/* ===========================================================
   北京绩兴防水 · 官网样式
   1:1 还原 Ardot 画布 734282765724325（1440 设计稿）
   变量集中在 :root，可整体换色
   =========================================================== */

:root{
  /* 品牌 */
  --brand:        #10BA82;   /* 主色：导航当前态 / 主标题行2 / Badge */
  --brand-deep:   #059669;   /* 业务编号 / CECS 标题 / 页脚绩字块 */
  --brand-dark:   #052E24;   /* Tab 选中态 / 返回顶部 */
  --brand-line:   #34D399;   /* 次按钮描边 */

  /* 暖色点缀 */
  --warm:         #D97805;
  --warm-deep:    #B5540A;
  --warm-bright:  #F59E0A;   /* 标题饰条 */
  --warm-soft:    #FCF5E3;   /* 信任标签 / 工艺卡底 */

  /* 表面 */
  --bg:           #FFFFFF;
  --bg-soft:      #F2FAF5;   /* 薄荷区块底 / 数据小卡 */
  --bg-tint:      #EDF7F0;   /* TopBar / 理念卡 / 关于高亮卡 */
  --border:       #DEE3DE;

  /* 文字 */
  --ink:          #17211F;
  --ink-2:        #5C6B61;

  /* 尺寸 */
  --wrap:         1440px;
  --side:         80px;      /* 区块左右内边距 */
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:118px}
body{
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
/* 衬线字体：标题 / 编号 / 数值 */
.serif{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--side)}
.sec{padding:88px 0}
.sec-mint{background:var(--bg-soft)}
.sec-white{background:var(--bg)}
.sec-grad{background:linear-gradient(120deg,#EDF7F0 0%,#F5FAF7 100%)}

/* 区块标题组 */
.shead{display:flex;flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:40px}
.stitle{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:32px;font-weight:700;color:var(--ink);line-height:1.35}
.sbar{display:block;width:56px;height:4px;border-radius:2px;background:var(--warm-bright)}
.ssub{font-size:15px;color:var(--ink-2)}
#business .stitle{font-size:38px}
#technology .stitle{font-size:38px}
#business .sbar,#technology .sbar{width:52px}

/* ===================== 01 Header ===================== */
.header{position:sticky;top:0;z-index:100;background:var(--bg)}
.topbar{background:var(--bg-tint)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:40px}
.tb-slogan{font-size:13px;color:var(--ink-2)}
.tb-tel{display:flex;align-items:center;gap:10px}
.tb-label{font-size:13px;color:var(--ink-2)}
.tb-tel a{font-size:14px;font-weight:700;color:var(--warm)}

.mainbar{background:var(--bg);border-bottom:1px solid var(--border)}
.mainbar-inner{display:flex;align-items:center;gap:24px;height:78px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-img{width:46px;height:46px;border-radius:23px;overflow:hidden;background:var(--bg-tint)}
.logo-img img{width:100%;height:100%;object-fit:cover}
.logo-name{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:21px;font-weight:700;color:#051E17}

.nav{display:flex;align-items:center;gap:26px;margin-left:12px;flex:1}
.nav-link{font-size:15px;color:var(--ink-2);transition:color .2s;white-space:nowrap}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);font-weight:700}

.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px}

/* ===================== 02 Hero ===================== */
.hero{background:linear-gradient(100deg,#F5FAF7 0%,#E8F5EE 55%,#FAF0D9 100%);padding:72px 0}
.hero-inner{display:flex;gap:56px;align-items:center}
.hero-text{flex:1;min-width:0;display:flex;flex-direction:column;align-items:flex-start;gap:26px}

.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;
  background:var(--bg);border:1px solid var(--brand);
  font-size:13px;font-weight:500;color:var(--brand);
}
.badge-dot{width:7px;height:7px;border-radius:4px;background:var(--brand);flex-shrink:0}

.hero-titles{display:flex;flex-direction:column;gap:6px}
.ht1,.ht2{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  font-size:62px;font-weight:700;line-height:78px;
}
.ht1{color:#17211E}
.ht2{color:var(--brand)}

.hero-sub{font-size:17px;line-height:30px;color:var(--ink-2);max-width:560px}

.btn-ghost{
  display:inline-block;padding:15px 30px;border-radius:999px;
  border:1px solid var(--brand-line);
  font-size:16px;font-weight:500;color:var(--brand);
  transition:background .2s,color .2s;
}
.btn-ghost:hover{background:var(--brand);color:#fff}

.trust{display:flex;flex-wrap:wrap;gap:12px}
.trust span{
  padding:8px 14px;border-radius:8px;
  background:var(--warm-soft);color:var(--warm-deep);font-size:13px;
}

.hero-visual{width:560px;flex-shrink:0;display:flex;flex-direction:column;gap:14px}
.hero-shot{
  height:372px;border-radius:16px;overflow:hidden;
  border:1px solid var(--brand);
  box-shadow:0 24px 48px -10px rgba(0,0,0,.35);
}
.hero-shot img{width:100%;height:100%;object-fit:cover}
.hero-caption{font-size:13px;color:var(--ink-2);text-align:center}

.hero-qr{display:flex;gap:16px}
.qrc{
  flex:1;background:var(--bg);border-radius:14px;padding:20px;
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.qrc img{width:120px;height:120px;border-radius:8px;object-fit:cover}
.qrc-t{font-size:13px;font-weight:500;color:#17211E;text-align:center}
.qrc-d{font-size:11px;color:var(--ink-2);text-align:center;line-height:1.6}

/* ===================== 网格 ===================== */
.grid{display:grid;gap:20px}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g2w{grid-template-columns:repeat(2,1fr);gap:20px}

/* ===================== 03 业务领域 ===================== */
.biz{background:var(--bg);border-radius:14px;overflow:hidden;transition:transform .25s,box-shadow .25s}
.biz:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(23,33,31,.10)}
.biz-img{height:176px;overflow:hidden;background:var(--bg-tint)}
.biz-img img{width:100%;height:100%;object-fit:cover}
.biz-body{padding:18px 22px 20px;display:flex;flex-direction:column;gap:10px}
.biz-h{display:flex;align-items:center;gap:10px}
.biz-num{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:22px;font-weight:700;color:var(--brand-deep);line-height:1}
.biz-body h3{font-size:17px;font-weight:500;color:var(--ink)}
.biz-body p{font-size:13px;color:var(--ink-2);line-height:1.75}

/* ===================== 04 研究成效 ===================== */
.ach-wrap{display:flex;gap:56px;align-items:flex-start}
.ach-lead{width:400px;flex-shrink:0;display:flex;flex-direction:column;gap:20px}
.ach-eyebrow{font-size:13px;font-weight:500;color:var(--warm)}
.ach-title{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:40px;font-weight:700;color:var(--ink);line-height:1.25}
.ach-desc{font-size:15px;color:var(--ink-2);line-height:1.85}
.ach-chips{display:flex;flex-wrap:wrap;gap:10px}
.ach-chips span{padding:8px 14px;border-radius:999px;background:var(--bg);font-size:12px;font-weight:500;color:var(--ink-2)}

.grid.g2{flex:1;min-width:0}
.ach{background:var(--bg);border-radius:12px;padding:22px 24px;display:flex;flex-direction:column;gap:10px;transition:transform .25s,box-shadow .25s}
.ach:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(23,33,31,.10)}
.ach-num{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:20px;font-weight:700;color:var(--warm);line-height:1}
.ach h3{font-size:17px;font-weight:500;color:var(--ink)}
.ach p{font-size:13px;color:var(--ink-2);line-height:1.8}

/* ===================== 05/06 产品区 ===================== */
.prod-sec{padding:0 0 88px}
.ptabs{display:flex;gap:8px;padding:48px 0 0;flex-wrap:wrap}
.ptab{
  padding:12px 24px;border-radius:999px;border:none;cursor:pointer;
  font-family:inherit;font-size:15px;font-weight:500;
  background:var(--bg);color:var(--ink);transition:all .2s;
}
.ptab.is-active{background:var(--brand-dark);color:#fff}

.ppanel{display:none;padding-top:40px}
.ppanel.is-active{display:block}

.phead{display:flex;flex-direction:column;gap:12px;margin-bottom:36px}
.plabel-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.plabel{padding:5px 12px;border-radius:6px;background:var(--warm);color:#fff;font-size:12px;font-weight:500}
.plabel-note{font-size:14px;color:var(--ink-2)}
.pname{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:36px;font-weight:700;color:var(--ink)}
.pname sup{font-size:14px;font-weight:500}
.ppos{font-size:15px;color:var(--ink-2);line-height:1.8}

.pbody{display:flex;gap:48px;align-items:flex-start}
.pcol-l{width:420px;flex-shrink:0;background:var(--bg);border-radius:16px;padding:28px;display:flex;flex-direction:column;gap:16px}
.pcol-r{flex:1;min-width:0;display:flex;flex-direction:column;gap:20px}

.pstitle{font-size:18px;font-weight:500;color:var(--ink)}
.feat{display:flex;flex-direction:column;gap:2px;padding-left:16px}
.fn{font-size:14px;font-weight:500;color:var(--warm)}
.fd{font-size:13px;color:var(--ink-2)}

.craft{background:var(--warm-soft);border-radius:10px;padding:14px 18px;font-size:13px;color:var(--ink);line-height:1.75}
.craft-2{padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.craft-t{font-size:14px;font-weight:500;color:var(--ink)}
.craft-p{font-size:13px;color:var(--ink);line-height:1.7}
.craft-note{font-size:12px;font-weight:500;color:var(--warm-deep)}

.shots{display:flex;gap:16px}
.shot-b,.shot-s{margin:0;border-radius:12px;overflow:hidden;background:var(--bg-tint);height:340px}
.shot-b img,.shot-s img{width:100%;height:100%;object-fit:cover}
.shot-b{flex:0 0 320px;width:320px}
.shot-s{flex:1;min-width:0}

.dcard{background:var(--bg);border-radius:16px;padding:22px 24px;display:flex;flex-direction:column;gap:16px}
.dgrid{display:flex;flex-wrap:wrap;gap:16px}
.dc{
  width:244px;flex:0 0 244px;background:var(--bg-soft);border-radius:10px;
  padding:14px 18px;display:flex;flex-direction:column;gap:4px;
}
.dv{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:28px;font-weight:700;color:var(--warm);line-height:1.2}
.dn{font-size:12px;color:var(--ink-2);line-height:1.5}
.std{font-size:12px;color:var(--ink-2)}
.std.minor{margin-top:-6px}

/* ===================== 07 专业技术 ===================== */
.tech{
  background:var(--bg);border-radius:12px;padding:20px 22px;
  display:flex;align-items:center;gap:14px;min-height:62px;
  transition:transform .25s,box-shadow .25s;
}
.tech:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(23,33,31,.10)}
.tn{font-size:12px;font-weight:500;color:var(--warm);flex-shrink:0}
.tname{font-size:15px;font-weight:500;color:var(--ink);line-height:1.6}

.cecs{margin-top:20px;background:var(--bg);border-radius:16px;padding:28px 32px;display:flex;flex-direction:column;gap:14px}
.cecs h3{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:20px;font-weight:700;color:var(--brand-deep);line-height:1.55}
.cecs p{font-size:14px;color:var(--ink-2);line-height:2;text-align:justify}

/* ===================== 08 服务流程 ===================== */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.fstep{background:var(--bg);border-radius:14px;padding:24px 22px;display:flex;flex-direction:column;gap:10px;transition:transform .25s,box-shadow .25s}
.fstep:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(23,33,31,.10)}
.fnum{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:26px;font-weight:700;color:var(--warm);line-height:1}
.fstep h3{font-size:18px;font-weight:500;color:var(--ink)}
.fstep p{font-size:13px;color:var(--ink-2);line-height:1.7}

.fbot{display:flex;gap:24px;margin-top:24px;align-items:stretch}
.idea{width:400px;flex-shrink:0;background:var(--bg-tint);border-radius:14px;padding:28px 30px;display:flex;flex-direction:column;gap:12px}
.idea h3{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:24px;font-weight:700;color:var(--warm-deep)}
.idea p{font-size:14px;color:var(--ink);line-height:1.9}
.judge{flex:1;background:var(--bg);border-radius:14px;padding:28px 30px;display:flex;flex-direction:column;gap:12px}
.jtag{font-size:12px;font-weight:500;color:var(--brand)}
.judge p{font-size:15px;color:var(--ink);line-height:1.9}

/* ===================== 09 工程案例 ===================== */
.case{
  background:var(--bg);border-radius:16px;padding:32px;
  display:flex;gap:48px;align-items:flex-start;margin-bottom:24px;
}
.case:last-child{margin-bottom:0}
.case-rev{flex-direction:row-reverse}

.c-text{width:480px;flex-shrink:0;display:flex;flex-direction:column;gap:12px}
.ctag{align-self:flex-start;padding:5px 12px;border-radius:6px;background:var(--warm);color:#fff;font-size:12px;font-weight:500}
.cname{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:24px;font-weight:700;color:var(--ink);line-height:1.4}
.ch{font-size:14px;font-weight:500;color:var(--warm-deep);margin-top:4px}
.c-text p{font-size:13px;color:var(--ink-2);line-height:1.85}

.c-gal{flex:1;min-width:0;display:flex;flex-wrap:wrap;gap:16px}
.c-gal figure{margin:0;width:240px;height:170px;flex:0 0 240px;border-radius:10px;overflow:hidden;background:var(--bg-tint)}
.c-gal img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.c-gal figure:hover img{transform:scale(1.06)}

/* ===================== 10 关于绩兴 ===================== */
.about-hl{background:var(--bg-tint);border-radius:16px;padding:34px 36px;display:flex;flex-direction:column;gap:14px}
.about-hl h3{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:20px;font-weight:700;color:var(--brand)}
.about-hl p{font-size:14px;color:var(--ink);line-height:2;text-align:justify}

.about-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}
.apara{background:var(--bg-soft);border-radius:14px;padding:26px 28px;display:flex;flex-direction:column;gap:10px}
.apara h4{font-size:15px;font-weight:500;color:var(--brand)}
.apara p{font-size:13px;color:var(--ink-2);line-height:1.9}

/* ===================== 11 联系我们 ===================== */
.contact{padding:64px 0 40px}
.c-main{display:flex;gap:64px;align-items:flex-start}
.cbrand{width:340px;flex-shrink:0;display:flex;flex-direction:column;gap:14px}
.cbrand-row{display:flex;align-items:center;gap:12px}
.cmark{
  padding:6px 10px;border-radius:8px;background:var(--brand-deep);color:#fff;
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  font-size:22px;font-weight:700;line-height:1.3;
}
.cname{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:20px;font-weight:700;color:var(--ink)}
.csub{font-size:12px;color:var(--ink-2)}
.cslogan{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;font-size:16px;font-weight:700;color:var(--warm)}
.cwelcome{font-size:12px;color:var(--ink-2);line-height:1.8}

.cinfo{flex:1;min-width:0;display:flex;flex-direction:column;gap:20px}
.ctitle{font-size:16px;font-weight:500;color:var(--ink)}
.cgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.ci{display:flex;flex-direction:column;gap:6px}
.cil{font-size:12px;color:var(--warm)}
.ci a,.ci p{font-size:13px;color:var(--ink);line-height:1.7}
.ci a:first-of-type{font-size:14px;font-weight:700}
.ci a:hover{color:var(--brand)}

.c-qr-map{display:flex;gap:24px;margin-top:36px}
.qcard{background:var(--bg);border-radius:14px;padding:22px 24px;display:flex;flex-direction:column;gap:10px}
.qcard:first-child{width:371px;flex-shrink:0}
.qcard:last-child{flex:1;min-width:0}
.qt{font-size:13px;font-weight:500;color:var(--ink)}
.qd{font-size:11px;color:var(--ink-2)}
.qp{display:flex;gap:16px;margin-top:4px}
.qp img{width:110px;height:110px;border-radius:8px;object-fit:cover}
.map-ph{height:120px;border-radius:8px;background:var(--bg-tint);margin-bottom:4px}

.legal{margin-top:36px;display:flex;flex-direction:column;gap:8px}
.legal .line{height:1px;background:var(--border);margin-bottom:14px}
.legal p{font-size:12px;color:var(--ink-2);text-align:center}
.legal a:hover{color:var(--brand);text-decoration:underline}
.sep{margin:0 6px;color:var(--border)}

/* ===================== 返回顶部 ===================== */
.to-top{
  position:fixed;right:40px;bottom:40px;z-index:90;
  display:flex;align-items:center;gap:6px;
  padding:14px 16px;border:none;border-radius:999px;
  background:var(--brand-dark);color:#fff;
  font-family:inherit;font-size:14px;font-weight:700;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(12px);transition:all .28s;
  box-shadow:0 4px 12px rgba(0,102,77,.22);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-deep)}

/* ===================== 响应式 ===================== */
@media (max-width:1400px){
  :root{--side:48px}
  .hero-visual{width:480px}
  .ht1,.ht2{font-size:52px;line-height:66px}
  .dc{width:calc(33.333% - 11px);flex:0 0 calc(33.333% - 11px)}
  .c-gal figure{width:calc(33.333% - 11px);flex:0 0 calc(33.333% - 11px)}
}
@media (max-width:1180px){
  :root{--side:32px}
  .hero-inner{flex-direction:column;gap:40px}
  .hero-visual{width:100%}
  .hero-shot{height:300px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .ach-wrap{flex-direction:column;gap:32px}
  .ach-lead{width:100%}
  .pbody{flex-direction:column;gap:24px}
  .pcol-l{width:100%}
  .flow{grid-template-columns:repeat(3,1fr)}
  .fbot{flex-direction:column}
  .idea{width:100%}
  .case,.case-rev{flex-direction:column;gap:28px}
  .c-text{width:100%}
  .c-main{flex-direction:column;gap:32px}
  .cbrand{width:100%}
  .c-qr-map{flex-direction:column}
  .qcard:first-child{width:100%}
}
@media (max-width:860px){
  :root{--side:20px;--wrap:100%}
  .topbar{display:none}
  html{scroll-padding-top:64px}
  .mainbar-inner{height:64px;position:relative;flex-wrap:wrap}
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;margin-left:0;
    background:var(--bg);border-top:1px solid var(--border);
    box-shadow:0 12px 28px rgba(23,33,31,.12);padding:8px 0;
  }
  .nav.open{display:flex}
  .nav-link{padding:14px 20px}
  .nav-toggle{display:flex}
  .sec{padding:56px 0}
  .stitle,#business .stitle,#technology .stitle{font-size:26px}
  .ht1,.ht2{font-size:34px;line-height:46px}
  .hero{padding:48px 0}
  .hero-qr{flex-direction:column}
  .g4,.g2,.g2w,.about-2,.cgrid{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .shots{flex-direction:column}
  .shot-b,.shot-s{width:100%;flex:1 1 auto;height:260px}
  .dc{width:calc(50% - 8px);flex:0 0 calc(50% - 8px)}
  .c-gal figure{width:calc(50% - 8px);flex:0 0 calc(50% - 8px);height:150px}
  .ach-title{font-size:30px}
  .qp img{width:96px;height:96px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:520px){
  .flow{grid-template-columns:1fr}
  .dc{width:100%;flex:0 0 100%}
  .qp{flex-wrap:wrap;justify-content:center}
}