/* 字体：Muli（正文）+ Roboto（大标题）+ Rubik（小标题）*/
/* ---------- 设计变量 ---------- */
:root {
  --ara-navy:      #334f8d;
  --ara-navy-dark: #263a6b;
  --ara-sky:       #80c2d7;
  --ara-sky-light: #eef6fa;
  --ara-accent:    #b75136;
  --ara-ink:       #202022;
  --ara-ink-soft:  #4b4b50;
  --ara-muted:     #6f6f76;
  --ara-bg:        #ebebf1;
  --ara-bg-light:  #f6f7fb;
  --ara-white:     #ffffff;
  --ara-line:      #e2e4ec;
  --ara-radius:    14px;
  --ara-radius-sm: 10px;
  --ara-shadow:    0 20px 50px -20px rgba(32, 32, 34, .18);
  --ara-shadow-sm: 0 10px 30px -15px rgba(32, 32, 34, .15);
  --ara-font-body: "Muli", "Segoe UI", -apple-system, sans-serif;
  --ara-font-head: "Roboto", "Segoe UI", sans-serif;
  --ara-font-sub:  "Rubik", "Segoe UI", sans-serif;
 
  --ara-container:  1380px;
  --ara-gutter: 24px;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px;}
/* 断点体系：桌面 ≥1080 / 平板 768-1079 / 移动 <768（与导航断点一致） */
@media (max-width: 1080px) {
  :root {
    --ara-container: calc(100% - 5rem);
    --ara-gutter: 20px;
  }
}
@media (max-width: 767px) {
  :root {
    --ara-container: 100%;
    --ara-gutter: 20px;
  }
  html { font-size: 14px;}
}
/* ---------- 重置 ---------- */
body {
  margin: 0 auto;
  max-width: 1920px;
  font-family: var(--ara-font-body);
  font-size: 1.0rem;
  line-height: 1.65;
  color: var(--ara-ink);
  background: var(--ara-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%;}
a { color: inherit; text-decoration: none; transition: color .25s ease; }
a:hover{ text-decoration: none;}
ul, ol,li { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--ara-font-sub);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ara-ink);
}
p { margin: 0; }

/* ---------- 容器 ---------- */
.ara-container {
  width: 100%;
  max-width: var(--ara-container);
  margin: 0 auto;
  padding-left: var(--ara-gutter);
  padding-right: var(--ara-gutter);
}

/* ---------- 通用排版 ---------- */
.ara-eyebrow {
  font-family: var(--ara-font-sub);
  font-size: clamp(13px, 1.4vw, 16px);
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ara-accent);
  margin-bottom: 14px;
}
.ara-section-title {
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 900;
  line-height: 1.12;
}
.ara-title-accent { color: var(--ara-navy); }
.ara-section-subtitle {
  font-size: clamp(14px, 1.7vw, 18px);
  color: var(--ara-ink-soft);
  margin-top: 16px;
}
.ara-light { color: var(--ara-white); }

/* ---------- 按钮 ---------- */
.ara-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ara-font-sub);
  font-weight: 600;
  font-size: clamp(13px, 1.4vw, 15px);
  padding: 15px 3.0rem;
  border-radius: 100px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .28s ease;
  line-height: 1;
}
.ara-btn svg { flex-shrink: 0; }
.ara-btn-primary {
  background: var(--ara-navy);
  color: #fff;
  box-shadow: var(--ara-shadow-sm);
}
.ara-btn-primary:hover {
  background: var(--ara-navy-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--ara-shadow);
}
.ara-btn-ghost {
  background: transparent;
  color: var(--ara-ink);
  border-color: var(--ara-line);
}
.ara-btn-ghost:hover {
  border-color: var(--ara-navy);
  color: var(--ara-navy);
}
.ara-btn-xl { padding: 18px 36px; font-size: 18px; }
.ara-btn-block { width: 100%; justify-content: center; }

/* 深色背景上的亮色按钮（白描边，hover 反白） */
.ara-btn-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .55);
}
.ara-btn-light:hover {
  background: #fff;
  color: var(--ara-ink);
  border-color: #fff;
  transform: translateY(-2px);
}

/* 浅蓝实底按钮（设计稿 Hero / FinalCTA：#80c2d7 底 + 深色文字） */
.ara-btn-sky {
  background: var(--ara-sky);
  border-color: var(--ara-sky);
}
.ara-btn-sky:hover {
  background: #9fd4e6;
  border-color: #9fd4e6;
  color: #101014;
  transform: translateY(-2px);
}

/* 浅色背景上的深色按钮 */
.ara-btn-dark {
  background: var(--ara-navy);
  color: #fff;
  border-color: var(--ara-navy);
}
.ara-btn-dark:hover {
  background: var(--ara-navy-dark);
  border-color: var(--ara-navy-dark);
  color: #fff;
  transform: translateY(-2px);
}

/* ============================================================
   顶部导航（按 ARA PDF 设计稿：深色背景 + 白字 + Logo 左 + 主菜单右）
   ============================================================ */
.ara-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--ara-ink);
}
.ara-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 24px;
}

/* Logo（白色） */
.ara-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.ara-logo img {
  height: 62px;
  width: auto;
}

/* 主导航 */
.ara-nav { display: flex; align-items: center; }
.ara-nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.ara-nav-item { position: relative; }
.ara-nav-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--ara-font-sub);
  font-size: 18px;
  color: #fff;
  padding: 10px 18px;
  border-radius: 6px;
  transition: color .2s ease;
  white-space: nowrap;
}
.ara-nav-link:hover { color: var(--ara-sky); }

/* 下拉菜单 */
.ara-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0;
  min-width: 280px;
  background: #1b1b1d;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 0 0 var(--ara-radius-sm) var(--ara-radius-sm);
  box-shadow: 0 24px 50px -18px rgba(0, 0, 0, .55);
  padding: 14px 16px;
  display: flex;
  gap: 24px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all .22s ease;
  z-index: 100;
}
.ara-dropdown-single { min-width: 220px; }
.ara-dropdown-col {
  flex: 0 0 auto;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ara-dropdown-group-title {
  font-family: var(--ara-font-sub);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ara-ink);
  padding: 6px 10px 2px;
  margin: 0;
  line-height: 1.3;
}
.ara-dropdown-link {
  display: block;
  padding: 7px 10px;
  font-family: var(--ara-font-sub);
  font-weight: 600;
  font-size: 16px;
  color: #fff;
  border-radius: 6px;
  line-height: 1.4;
  transition: color .2s ease, background .2s ease;
  white-space: nowrap;
}
.ara-dropdown-link:hover { background: rgba(255, 255, 255, .08); color: var(--ara-sky); }

/* 下拉显示（hover / focus） */
.ara-nav-item.has-dropdown:hover > .ara-dropdown,
.ara-nav-item.has-dropdown:focus-within > .ara-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 语言切换（地球图标） */
.ara-lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 50%;
  cursor: pointer;
  flex-shrink: 0;
  transition: all .25s ease;
  display: none;
}
.ara-lang:hover { background: rgba(255, 255, 255, .1); border-color: #fff; }

/* 汉堡按钮（移动端） */
.ara-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
}
.ara-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
  transition: all .3s ease;
}

/* 移动端抽屉 */
.ara-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 22, .5);
  opacity: 0;
  visibility: hidden;
  transition: all .3s ease;
  z-index: 1100;
}
.ara-drawer-overlay.is-open { opacity: 1; visibility: visible; }
.ara-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  max-width: 85vw;
  height: 100vh;
  background: #fff;
  z-index: 1200;
  padding: 20px;
  overflow-y: auto;
  transition: right .35s cubic-bezier(.22, .61, .36, 1);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.ara-drawer.is-open { right: 0; }
.ara-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ara-drawer-logo img { height: 36px; width: auto; }
.ara-drawer-close {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--ara-ink);
  padding: 6px;
}
.ara-drawer-nav { display: flex; flex-direction: column; }
.ara-drawer-link {
  display: block;
  padding: 14px 4px;
  font-family: var(--ara-font-sub);
  font-weight: 600;
  font-size: 18px;
  color: var(--ara-ink);
  border-bottom: 1px solid var(--ara-line);
}
/* 有二级菜单的项：一行内「左侧链接 + 右侧三角切换按钮」 */
.ara-drawer-item {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--ara-line);
}
.ara-drawer-item .ara-drawer-link {
  flex: 1;
  min-width: 0;
  border-bottom: none;
}
.ara-drawer-toggle {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: 8px;
  background: transparent;
  border: none;
  color: var(--ara-ink);
  cursor: pointer;
}
.ara-drawer-toggle svg { transition: transform .3s ease; }
/* 展开时三角旋转 180°，指向向上 */
.ara-drawer-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.ara-drawer-sub {
  display: none;
  padding: 8px 12px 14px;
  background: var(--ara-bg-light);
  border-radius: 0 0 var(--ara-radius-sm) var(--ara-radius-sm);
}
.ara-drawer-sub.is-open { display: block; }
.ara-drawer-sub-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ara-muted);
  margin: 10px 0 4px;
}
.ara-drawer-sub a {
  display: block;
  padding: 7px 0;
  font-size: 15px;
  color: var(--ara-ink-soft);
}
/* 当前位置 */
.position{
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}
.position ul.crumb,.ny-nav{
    display: flex;
}
.position ul.crumb li{
    padding: 0px 2px;
}
.m-pro-nav{
    display: block;
}
.m-pro-nav .dropdown .btn{
    width:100%;
    background: transparent;
    color: #fff;
    border: 1px solid #dcdcdc;
    padding:10px 2.0rem;
}
.m-pro-nav .dropdown .dropdown-menu{
    width:100%;
    padding:10px 20px;
    min-height:220px;
    overflow: auto;
}
.m-pro-nav .dropdown .dropdown-menu li{
    padding:8px 10px;
    border-bottom:1px solid #ddd;
}
/* ============================================================
   页脚（按设计稿：深底 + 左单列品牌信息 + 右产品图，无导航列）
   ============================================================ */
/* ============================================================
   页脚（按参考图 1_04.jpg 重建：小 logo + 左品牌信息 +
   右侧深藏蓝面板三列导航 + 底部大 ARA 标志）
   ============================================================ */
.ara-footer {
  background: var(--ara-ink);
  color: #fff;
  padding: 5.0rem 0 0;
  overflow: hidden;
}

/* 顶部小 logo：白圆标记 + Cooling Solutions */
.ara-footer-brand { margin-bottom: 2.0rem; }
.ara-footer-logo { display: inline-flex; align-items: center; gap: 16px; text-decoration: none; }
.ara-footer-logo img { height: 80px; }

/* 主体：左品牌信息 + 右三列面板 */
.ara-footer-main {
  display: flex;
  justify-content: space-between;
  gap: 48px;
}
.ara-footer-text { max-width: 48%; }
.ara-footer-name {
  font-family: var(--ara-font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.5vw, 40px);
  line-height: 1.12;
  color: #fff;
}
.ara-footer-slogan {
  font-family: var(--ara-font-sub);
  font-weight: 700;
  font-size: clamp(18px, 1.8vw, 22px);
  color: var(--ara-sky);
  margin: 0.5rem 0px 2.0rem;
}
.ara-footer-mail,
.ara-footer-addr {
  display: block;
  font-family: var(--ara-font-sub);
  font-weight: 600;
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.3;
  color: #fff;
}
.ara-footer-mail:hover { color: var(--ara-sky); }

/* 右：深藏蓝面板三列导航 */
.ara-footer-panel {
  width: 50%;
  display: flex;
  justify-content: space-between;
  gap: 64px;
}
.ara-footer-col-title {
  font-weight: 700;
  font-size: 1.5rem;
  color: #1890c8;
  margin: 0 0 20px;
}
.ara-footer-col ul { list-style: none; margin: 0; padding: 0; }
.ara-footer-col li { margin-bottom: 10px; }
.ara-footer-col li:last-child { margin-bottom: 0; }
.ara-footer-col a {
  font-size: 1.0rem; 
  color: rgba(255, 255, 255, .9);
  text-decoration: none;
  transition: color .2s ease;
}
.ara-footer-col a:hover { color: var(--ara-sky); }

/* 底部：大 ARA 标志（低对比深蓝，同参考图） */
.ara-footer-biglogo {
  margin-top: -3.0rem;
  text-align: center;
}
.ara-footer-biglogo-ara {
  display: block;
  font-family: var(--ara-font-head);
  font-weight: 900;
  font-size: clamp(96px, 17vw, 230px);
  line-height: .86;
  letter-spacing: .06em;
  color: #262e41;
  white-space: nowrap;
}
.ara-footer-biglogo-sub {
  display: block;
  font-family: var(--ara-font-sub);
  font-weight: 600;
  font-size: clamp(15px, 2.2vw, 26px);
  letter-spacing: .3em;
  color: #262e41;
  margin-top: 10px;
}

/* ---------- 页脚响应式 ---------- */
/* 768–1280 区间紧凑度修正：1081–1280 加宽右侧导航面板，避免列被挤到 100px 出头；
   768–1080 品牌信息与三列导航改为上下堆叠，避免第三列（Quick Links）被裁切 */
@media (max-width: 1280px) {
  .ara-footer-text { max-width: 42%; }
  .ara-footer-panel { width: 56%; gap: 32px; }
  .ara-footer-col { min-width: 165px; }
  .ara-footer-col-title { white-space: nowrap; }
}
@media (max-width: 1080px) {
  .ara-footer-main { flex-wrap: wrap; gap: 40px; }
  .ara-footer-text { flex: 1 1 100%; max-width: 100%; }
  .ara-footer-panel { width: 100%; gap: 36px; }
}
@media (max-width: 767px) {
  .ara-footer { padding-top: 3.5rem; }
  .ara-footer-logo img { height: 84px; }
  .ara-footer-main {
    flex-direction: column;
    gap: 36px;
  }
  .ara-footer-text { max-width: 100%; }
  .ara-footer-name { font-size: clamp(26px, 8vw, 36px); }
  .ara-footer-slogan { font-size: clamp(17px, 5vw, 22px); margin-bottom: 1.5rem; }
  .ara-footer-mail,
  .ara-footer-addr { font-size: clamp(15px, 4.5vw, 20px); }
  .ara-footer-panel {
    width: 100%;
    flex-wrap: wrap;
    gap: 28px 32px;
  }
  .ara-footer-col { flex: 1 1 40%; min-width: 150px; }
  .ara-footer-col-title { font-size: 1.2rem; margin-bottom: 14px; }
  .ara-footer-biglogo { margin-top: 2rem; }
  .ara-footer-biglogo-ara { font-size: clamp(72px, 24vw, 110px); }
  .ara-footer-biglogo-sub { letter-spacing: .2em; }
}
@media (max-width: 767px) {
  .ara-footer-panel { flex-direction: column; gap: 22px; }
  .ara-footer-col { flex: 1 1 100%; min-width: 0; }
}

/* ============================================================
   返回顶部
   ============================================================ */
.ara-gotop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ara-navy);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--ara-shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .3s ease;
  z-index: 900;
}
.ara-gotop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.ara-gotop:hover { background: var(--ara-navy-dark); }

/* ---------- 响应式：导航 ---------- */
@media (max-width: 1080px) {
  .ara-lang { display: none; }
  .ara-nav { display: none; }
  .ara-burger { display: flex; }
  
  .ara-header-inner { height: 70px; }
  .ara-logo img { height: 36px; }
}

/* ============================================================
   导航滚动阴影（由 common.js 动态添加 .is-scrolled）
   ============================================================ */
.ara-header.is-scrolled {
  box-shadow: 0 8px 30px -12px rgba(32, 32, 34, .22);
}

/* ============================================================
   滚动入场动画（.reveal，由 common.js 的 IntersectionObserver 触发）
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1),
              transform .7s cubic-bezier(.22, .61, .36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}