/* ============================================================
   润安势·成都成华区站 子站主题 · 样式表（基座A变体 · 堆叠式首屏）
   视觉：石板灰蓝 + 冷青 · 工业市政质感
   类前缀：rch-
   ============================================================ */
:root{
  --primary:#3F4E57;--primary-2:#54707E;--accent:#3FA7D6;
  --bg:#F5F7F8;--bg-alt:#EAEFF2;--line:#DCE4E8;
  --heading:#16262E;--ink:#24343C;--muted:#61737C;
  --radius:12px;--radius-s:8px;
  --shadow:0 10px 26px rgba(22,38,46,.10);
  --shadow-h:0 16px 38px rgba(22,38,46,.16);
  --gradient:linear-gradient(135deg,#2C3A42,#4E6B78);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;}
body.rch-noscroll{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-2);}
h1,h2,h3,h4{color:var(--heading);line-height:1.3;margin:0 0 .5em;}
p{margin:0 0 1em;}

/* 按钮 */
.rch-btn{display:inline-block;padding:.68em 1.5em;border-radius:999px;font-weight:600;border:1px solid transparent;transition:transform .15s ease,box-shadow .2s ease;cursor:pointer;}
.rch-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow);color:#fff;}
.rch-btn--primary{background:var(--gradient);color:#fff;}
.rch-btn--ghost{background:rgba(255,255,255,.75);color:var(--primary);border-color:rgba(47,102,176,.4);}
.rch-btn--outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.rch-btn--lg{padding:.85em 2em;font-size:1.05rem;}

/* 顶部：品牌标题 + 导航 */
.rch-header{position:sticky;top:0;z-index:40;background:rgba(246,248,251,.94);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);}
.rch-header__bar{max-width:1180px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.rch-brand{display:flex;align-items:center;gap:14px;min-width:0;}
.rch-brand__logo{flex:none;}
.rch-brand__img{height:44px;width:auto;}
.rch-brand__title{display:flex;flex-direction:column;border-left:1px solid var(--line);padding-left:14px;line-height:1.3;min-width:0;}
.rch-brand__text,.rch-brand__name{font-size:22px;font-weight:800;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap;}
.rch-brand__meta{font-size:12px;color:var(--muted);white-space:nowrap;}
.rch-brand__meta b{color:var(--primary);}
.rch-nav{max-width:1180px;margin:0 auto;padding:0 20px 10px;display:flex;gap:6px;flex-wrap:wrap;}
.rch-nav__link{padding:8px 14px;border-radius:999px;color:var(--ink);font-weight:600;font-size:15px;}
.rch-nav__link:hover{background:var(--bg-alt);color:var(--primary);}
.rch-nav__link--on{background:var(--gradient);color:#fff;}
.rch-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer;}
.rch-burger span{width:22px;height:2px;background:var(--heading);}

/* 移动抽屉 */
.rch-drawer{position:fixed;top:0;right:0;bottom:0;width:78%;max-width:320px;background:#fff;z-index:60;transform:translateX(105%);transition:transform .25s ease;display:flex;flex-direction:column;padding:18px;}
.rch-drawer--open{transform:translateX(0);}
.rch-drawer__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;}
.rch-drawer__name{font-weight:700;color:var(--heading);}
.rch-drawer__close{background:none;border:0;font-size:26px;color:var(--muted);cursor:pointer;line-height:1;}
.rch-drawer__nav{display:flex;flex-direction:column;}
.rch-drawer__link{padding:12px 6px;border-bottom:1px solid var(--line);color:var(--ink);font-weight:600;}
.rch-drawer__link--on{color:var(--primary);}
.rch-drawer__tel{margin-top:auto;background:var(--gradient);color:#fff;text-align:center;padding:12px;border-radius:var(--radius-s);font-weight:700;}
.rch-scrim{position:fixed;inset:0;background:rgba(23,39,59,.45);z-index:50;opacity:0;pointer-events:none;transition:opacity .2s;}
.rch-drawer--open ~ .rch-scrim{opacity:1;pointer-events:auto;}

/* Hero：分屏（左文案 + 右图） */
.rch-main{display:block;}
.rch-hero{background:var(--gradient);}
.rch-hero__inner{max-width:1180px;margin:0 auto;padding:56px 20px;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;}
.rch-hero__badge{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);color:#fff;border-radius:999px;padding:4px 14px;font-size:14px;margin-bottom:14px;}
.rch-hero__title{color:#fff;font-size:clamp(30px,4.2vw,44px);margin:0 0 .4em;}
.rch-hero__sub{color:rgba(255,255,255,.88);font-size:17px;}
.rch-hero__meta{color:rgba(255,255,255,.75);font-size:14px;}
.rch-hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px;}
.rch-hero__media{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-h);}
.rch-hero__img{width:100%;height:100%;object-fit:cover;}
.rch-hero__tel{color:#fff;font-weight:800;}

/* 数据条（负边距悬浮） */
.rch-stats{max-width:1040px;margin:-34px auto 0;padding:0 20px;position:relative;z-index:2;}
.rch-stats__inner{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:22px 10px;}
.rch-stat{text-align:center;}
.rch-stat b{display:block;font-size:26px;color:var(--primary);font-weight:800;}
.rch-stat span{font-size:13px;color:var(--muted);}

/* 区块通用 */
.rch-sec{padding:56px 0;}
.rch-sec--alt{background:var(--bg-alt);}
.rch-sec--band{background:var(--gradient);}
.rch-sec--band h2,.rch-sec--band h3,.rch-sec--band p,.rch-sec--band .rch-eyebrow{color:#fff;}
.rch-sec--band .rch-sec__lead{color:rgba(255,255,255,.85);}
.rch-sec__inner{max-width:1180px;margin:0 auto;padding:0 20px;}
.rch-sec__inner--center{text-align:center;}
.rch-sec__inner--narrow{max-width:860px;}
.rch-sec--tight{padding:28px 0;}
.rch-sec__head{margin-bottom:22px;}
.rch-sec__head--center{text-align:center;}
.rch-eyebrow{display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--accent);font-weight:700;margin-bottom:6px;text-transform:uppercase;}
.rch-sec__title{font-size:clamp(22px,2.6vw,30px);}
.rch-sec__title--sm{font-size:20px;}
.rch-sec__lead{color:var(--muted);}
.rch-morelink{font-weight:700;color:var(--primary);}
.rch-morelink:hover{color:var(--accent);}

/* 关于（折叠简介） */
.rch-about{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center;}
.rch-about__full{max-height:250px;overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(180deg,#000 78%,transparent);mask-image:linear-gradient(180deg,#000 78%,transparent);}
.rch-about__full.rchopen{max-height:none;-webkit-mask-image:none;mask-image:none;}
.rch-about__full p{margin:0 0 .8em;}
.rch-about__full img{display:none;}
.rch-about__btn{display:inline-block;margin-top:12px;padding:4px 0;border:0;background:none;color:var(--primary);font-size:14px;font-weight:700;cursor:pointer;}
.rch-about__linkwrap{margin-top:14px;}

/* 卡片网格 */
.rch-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;}
.rch-grid--3{grid-template-columns:repeat(3,1fr);}
.rch-grid--4{grid-template-columns:repeat(4,1fr);}
.rch-grid--2{grid-template-columns:repeat(2,1fr);}
.rch-grid--gap{margin-top:18px;}
.rch-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 4px 14px rgba(38,69,107,.06);transition:transform .18s ease,box-shadow .18s ease;}
.rch-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);}
.rch-card__ico{display:inline-flex;width:40px;height:40px;border-radius:var(--radius-s);background:var(--bg-alt);color:var(--accent);align-items:center;justify-content:center;font-weight:800;margin-bottom:10px;}
.rch-card h3{font-size:17px;}
.rch-card p{color:var(--muted);font-size:14px;margin:0;}
.rch-card__img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-s) var(--radius-s) 0 0;}
.rch-card__link{display:block;color:inherit;}
.rch-card__title{font-size:16px;padding:12px 6px 4px;margin:0;}
.rch-card__desc{font-size:14px;color:var(--muted);padding:0 6px 6px;margin:0;}
.rch-region{display:inline-block;background:var(--bg-alt);color:var(--primary);border-radius:4px;padding:0 6px;font-size:12px;font-weight:700;margin-right:6px;vertical-align:2px;}
.rch-sec--band .rch-region{background:rgba(255,255,255,.18);color:#fff;}

/* 图片画廊 */
.rch-pic{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);overflow:hidden;}
.rch-pic img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.rch-pic figcaption{padding:8px 10px;font-size:13px;color:var(--ink);font-weight:600;}

/* 服务流程 */
.rch-flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:flow;}
.rch-flow li{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);border-radius:var(--radius-s);padding:18px;text-align:center;}
.rch-flow b{display:block;color:#fff;font-size:17px;margin-bottom:4px;}
.rch-flow span{color:rgba(255,255,255,.82);font-size:13px;}

/* 新闻列表 */
.rch-newslist{display:flex;flex-direction:column;}
.rch-newsrow{display:flex;align-items:center;gap:10px;padding:13px 4px;border-bottom:1px solid var(--line);}
.rch-newsrow__title{flex:1;color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.rch-newsrow__title:hover{color:var(--primary);}
.rch-newsrow__date{color:var(--muted);font-size:13px;white-space:nowrap;}
.rch-empty{color:var(--muted);text-align:center;padding:26px 0;}

/* FAQ */
.rch-faq{display:flex;flex-direction:column;gap:10px;max-width:900px;margin:0 auto;}
.rch-sec__inner .rch-faq{margin:0;}
.rch-faq__item,.rch-faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:2px 16px;}
.rch-faq summary{cursor:pointer;font-weight:700;color:var(--heading);padding:10px 0;}
.rch-faq__body{padding:2px 0 12px;color:var(--ink);}
.rch-faq__body p{margin:0;}

/* 分站互联 */
.rch-citylinks{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;}
.rch-citylinks__item{display:flex;flex-direction:column;gap:2px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:12px 14px;transition:box-shadow .18s,transform .18s;}
.rch-citylinks__item:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
.rch-citylinks__region{font-weight:800;color:var(--heading);}
.rch-citylinks__site{font-size:12px;color:var(--muted);}
.rch-fold{display:none;}
.rch-open .rch-fold{display:flex;}
.rch-citymore{display:block;margin:16px auto 0;padding:8px 26px;border-radius:999px;border:1px solid var(--primary);background:none;color:var(--primary);font-weight:700;cursor:pointer;}

/* 关联企业推荐 */
.rch-partners{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;}
.rch-partners__item{display:flex;justify-content:space-between;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:10px 14px;}
.rch-partners__item b{color:var(--heading);font-size:14px;}
.rch-partners__item span{color:var(--muted);font-size:12px;white-space:nowrap;}
.rch-partners--chips{display:flex;flex-wrap:wrap;gap:10px;}
.rch-partners__chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;color:var(--ink);font-weight:600;font-size:14px;}
.rch-partners__chip:hover{border-color:var(--primary);color:var(--primary);}

/* CTA */
.rch-cta{color:#fff;}
.rch-cta__phone{display:inline-block;font-size:clamp(28px,4vw,40px);font-weight:800;color:#fff;letter-spacing:.02em;margin:8px 0 14px;}
.rch-cta__phone:hover{color:#fff;}
.rch-cta .rch-btn--outline{border-color:rgba(255,255,255,.7);color:#fff;}
.rch-cta__title,.rch-cta__lead{color:#fff;}

/* 内页通用（页头/内容/侧栏） */
.rch-layout{max-width:1180px;margin:0 auto;padding:36px 20px;display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start;}
.rch-post{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 4px 14px rgba(38,69,107,.06);}
.rch-post__kicker{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.1em;}
.rch-post__title{font-size:24px;margin:.2em 0 .3em;}
.rch-post__meta{color:var(--muted);font-size:13px;border-bottom:1px solid var(--line);padding-bottom:12px;}
.rch-post__thumb{margin:16px 0;}
.rch-post__body{color:var(--ink);}
.rch-post__body img{border-radius:var(--radius-s);}
.rch-post__back{margin-top:20px;}
.rch-post__cta{margin-top:20px;border-top:1px solid var(--line);padding-top:16px;}
.rch-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;}
.rch-side__title{font-size:18px;border-bottom:2px solid var(--primary);padding-bottom:8px;}
.rch-side__list{list-style:none;margin:0;padding:0;}
.rch-side__item{padding:10px 0;border-bottom:1px dashed var(--line);display:flex;flex-direction:column;gap:2px;}
.rch-side__link{color:var(--ink);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.rch-side__date{color:var(--muted);font-size:12px;}
.rch-side__more{display:inline-block;margin-top:12px;font-weight:700;}
.rch-side__block{border-bottom:1px dashed var(--line);padding:12px 0;}
.rch-side__h{font-size:15px;color:var(--primary);}
.rch-side__p{font-size:13px;color:var(--muted);margin:0;}
.rch-side__ul{list-style:none;margin:0;padding:0;font-size:14px;}
.rch-side__ul li{padding:3px 0;}
.rch-side__ul li::before{content:"· ";color:var(--accent);font-weight:800;}
.rch-side__tags{display:flex;flex-wrap:wrap;gap:8px;}
.rch-tag{background:var(--bg-alt);color:var(--primary);border-radius:4px;padding:2px 8px;font-size:12px;}
.rch-prodhero{background:var(--bg-alt);border-bottom:1px solid var(--line);}
.rch-prodhero__inner{max-width:1180px;margin:0 auto;padding:40px 20px;display:grid;grid-template-columns:1fr 1.1fr;gap:32px;align-items:center;}
.rch-prodhero__media img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow);}
.rch-prodhero__kicker{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.1em;}
.rch-prodhero__title{font-size:clamp(22px,2.6vw,30px);}
.rch-prodhero__desc{color:var(--muted);}
.rch-prodhero__info{list-style:none;margin:0 0 18px;padding:0;font-size:14px;}
.rch-prodhero__info li{padding:6px 0;border-bottom:1px dashed var(--line);}
.rch-prodhero__info span{display:inline-block;width:76px;color:var(--muted);}
.rch-prodhero__actions{display:flex;gap:12px;flex-wrap:wrap;}
.rch-prodshow{padding:36px 0;}
.rch-prodshow__title{font-size:22px;}
.rch-prose{color:var(--ink);max-width:860px;}
.rch-prose p{margin:0 0 .8em;}
.rch-qual{white-space:normal;}
.rch-contact{max-width:640px;margin:0 auto 26px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;}
.rch-contact__item{display:flex;border-bottom:1px solid var(--line);}
.rch-contact__k{flex:none;width:130px;background:var(--bg-alt);padding:13px 16px;font-weight:700;color:var(--heading);font-size:14px;}
.rch-contact__v{padding:13px 16px;color:var(--ink);}
.rch-steps{list-style:none;counter-reset:st;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:900px;margin-left:auto;margin-right:auto;}
.rch-steps li{counter-increment:st;background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:16px;}
.rch-steps li::before{content:"0" counter(st);display:block;font-weight:800;color:var(--accent);}
.rch-steps b{display:block;color:var(--heading);}
.rch-steps span{font-size:13px;color:var(--muted);}
.rch-pager{margin-top:24px;text-align:center;}
.pagination{display:inline-flex;flex-wrap:wrap;gap:6px;}
.pagination a,.pagination span{display:inline-block;min-width:34px;padding:6px 10px;border:1px solid var(--line);border-radius:var(--radius-s);background:#fff;color:var(--ink);font-size:14px;text-align:center;}
.pagination span{background:var(--gradient);color:#fff;border-color:transparent;font-weight:700;}
.pagination a:hover{border-color:var(--primary);color:var(--primary);}

/* 页脚 */
.rch-foot{background:#0F1A20;color:#B7C2CE;margin-top:40px;}
.rch-foot__inner{max-width:1180px;margin:0 auto;padding:36px 20px 24px;}
.rch-nap{font-size:13px;color:#8FA0B3;border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:14px;}
.rch-nap p{margin:0 0 4px;}
.rch-foot__cities{display:flex;flex-wrap:wrap;gap:8px 18px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.rch-foot__city{color:#B7C2CE;font-size:13px;}
.rch-foot__city:hover{color:#fff;}
.rch-foot__bar{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center;padding-top:16px;font-size:13px;}
.rch-foot__copy{margin:0;color:#8FA0B3;}
.rch-foot__links{margin:0;display:flex;gap:14px;}
.rch-foot__links a{color:#B7C2CE;}
.rch-foot__tel{font-weight:800;color:#fff;font-size:18px;}
.rch-dial{display:none;}

/* ==== 变体签名：成华站 · 堆叠式首屏（左对齐标题 + 宽幅广告图）+ 描边数据卡 ==== */
.rch-hero{background:linear-gradient(180deg,#EFF4F6,#FFFFFF);border-bottom:1px solid var(--line);}
.rch-hero__inner{max-width:1180px;margin:0 auto;padding:52px 20px 40px;display:block;}
.rch-hero__text{max-width:900px;}
.rch-hero__badge{display:inline-block;background:var(--bg-alt);border:1px solid var(--line);color:var(--primary);border-radius:999px;padding:5px 16px;font-size:14px;font-weight:700;}
.rch-hero__title{font-size:clamp(30px,4.4vw,48px);margin:.35em 0 .3em;letter-spacing:.01em;}
.rch-hero__sub{color:var(--muted);max-width:800px;}
.rch-hero__meta{color:var(--muted);font-size:14px;}
.rch-hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px;}
.rch-hero__wide{margin:28px 0 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.rch-hero__wide img{width:100%;aspect-ratio:21/8;object-fit:cover;}
.rch-hero .rch-btn--primary{background:var(--gradient);color:#fff;}
.rch-hero .rch-btn--ghost{background:#fff;border-color:var(--line);color:var(--primary);}
/* 数据条 → 描边数据卡 */
.rch-stats{margin:-26px auto 0;padding:0 20px;}
.rch-stats__inner{background:transparent;box-shadow:none;gap:14px;padding:0;grid-template-columns:repeat(4,1fr);}
.rch-stat{background:#fff;border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:var(--radius);padding:20px 10px;box-shadow:0 6px 18px rgba(22,38,46,.06);}
.rch-stat b{color:var(--primary);}
/* 卡片 → 左侧冷青竖线描边卡 */
.rch-card{border-left:3px solid var(--accent);box-shadow:0 5px 16px rgba(22,38,46,.06);}
.rch-card__ico{background:#E6F3F9;color:var(--primary);}

/* 响应式 */
@media (max-width:960px){
  .rch-nav{display:none;}
  .rch-burger{display:flex;}
  .rch-hero__inner{grid-template-columns:1fr;padding:40px 20px;}
  .rch-about{grid-template-columns:1fr;}
  .rch-layout{grid-template-columns:1fr;}
  .rch-prodhero__inner{grid-template-columns:1fr;}
  .rch-grid--3,.rch-grid--4{grid-template-columns:repeat(2,1fr);}
  .rch-grid--2{grid-template-columns:1fr;}
  .rch-flow{grid-template-columns:repeat(2,1fr);}
  .rch-steps{grid-template-columns:repeat(2,1fr);}
  .rch-stats__inner{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:640px){
  .rch-brand__img{height:34px;}
  .rch-brand__name{font-size:17px;}
  .rch-brand__meta{font-size:11px;}
  .rch-grid--3,.rch-grid--4{grid-template-columns:1fr;}
  .rch-flow,.rch-steps{grid-template-columns:1fr;}
  .rch-sec{padding:40px 0;}
  .rch-dial{display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:30;background:var(--gradient);color:#fff;justify-content:center;padding:12px;border-radius:999px;font-weight:700;box-shadow:var(--shadow-h);}
  .rch-foot{padding-bottom:70px;}
}

@media (max-width:960px){
  .rch-stats__inner{grid-template-columns:repeat(2,1fr);}
  .rch-hero__wide img{aspect-ratio:16/9;}
}
@media (max-width:640px){
  .rch-hero__inner{padding:36px 20px 30px;}
  .rch-stats__inner{grid-template-columns:1fr;}
}

/* 语义容器占位（补齐内页类名归属） */
.rch-about__media{min-width:0;}
.rch-about__text{min-width:0;}
.rch-card--ico{display:block;}
.rch-content{display:block;}
.rch-post__head{display:block;margin-bottom:18px;}
.rch-prodhero__detail{min-width:0;}
.rch-prodshow__main{display:block;}