/* ============ 兴越环保官网样式 ============ */
:root{
  --blue:#1660c4;
  --blue-deep:#0d3f8f;
  --blue-dark:#0a2c62;
  --green:#7ab648;
  --green-deep:#5d9430;
  --ink:#1c2b3a;
  --gray:#5d6b7a;
  --line:#e3e9f0;
  --bg:#f5f8fb;
  --white:#ffffff;
  --radius:14px;
  --shadow:0 10px 30px rgba(13,63,143,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC","Segoe UI",sans-serif;
  color:var(--ink);background:var(--white);line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,92%);margin:0 auto}
.pc-only{display:inline}
@media(max-width:768px){.pc-only{display:none}}

/* ---------- 顶栏 ---------- */
.topbar{background:linear-gradient(90deg,var(--blue-dark),var(--blue));color:#dbe7f7;font-size:13px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;padding:7px 0;gap:12px;flex-wrap:wrap}
.topbar-contact{display:flex;gap:18px}
.topbar-contact a:hover{color:#fff}
.topbar-slogan{color:#bcd7a9;letter-spacing:1px}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 24px rgba(13,63,143,.12)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{background:#fff;border-radius:12px;padding:3px 8px;box-shadow:0 2px 10px rgba(13,63,143,.12)}
.brand-logo img{height:44px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:20px;color:var(--blue);letter-spacing:2px}
.brand-text em{font-style:normal;font-size:10px;color:var(--green-deep);letter-spacing:1.5px}
.nav-links{display:flex;gap:6px}
.nav-links a{padding:8px 15px;border-radius:8px;font-size:15px;font-weight:600;color:#33475c;transition:.25s;position:relative}
.nav-links a:hover{color:var(--blue);background:#eaf1fb}
.nav-links a.active{color:#fff;background:linear-gradient(90deg,var(--blue),#2e86e0)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:3px;background:var(--blue);border-radius:2px;transition:.3s}

/* ---------- 首屏 ---------- */
.hero{position:relative;min-height:86vh;display:flex;flex-direction:column;justify-content:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url("../img/hero-tech.jpg") center/cover no-repeat;transform:scale(1.05);animation:heroZoom 18s ease-in-out infinite alternate}
@keyframes heroZoom{from{transform:scale(1)}to{transform:scale(1.12)}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(23,88,178,.72) 0%,rgba(30,110,210,.42) 45%,rgba(30,120,220,.18) 75%,rgba(40,140,230,.10) 100%)}
.hero-overlay::after{content:"";position:absolute;inset:auto 0 0 0;height:34%;
  background:linear-gradient(transparent,rgba(10,44,98,.55))}
.hero-content{position:relative;z-index:2;padding:90px 0 130px}
.hero-kicker{display:inline-block;border:1px solid rgba(255,255,255,.65);background:rgba(13,63,143,.28);border-radius:999px;padding:5px 18px;font-size:14px;letter-spacing:3px;color:#ffffff;margin-bottom:22px;text-shadow:0 1px 6px rgba(13,63,143,.5)}
.hero h1{font-size:clamp(30px,4.6vw,54px);line-height:1.28;letter-spacing:2px;margin-bottom:20px;
  text-shadow:0 4px 24px rgba(0,0,0,.35),0 2px 8px rgba(13,63,143,.5)}
.hero h1::after{content:"";display:block;width:88px;height:5px;margin-top:22px;border-radius:3px;
  background:linear-gradient(90deg,var(--green),transparent)}
.hero-sub{max-width:820px;color:#eaf3ff;font-size:16.5px;margin-bottom:34px;text-shadow:0 2px 10px rgba(13,63,143,.6)}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 34px;border-radius:999px;font-weight:700;letter-spacing:1px;transition:.3s;font-size:15px}
.btn-primary{background:linear-gradient(90deg,var(--green),#93c95f);color:#fff;box-shadow:0 8px 24px rgba(122,182,72,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(122,182,72,.55)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}

.hero-stats{position:relative;z-index:2;background:rgba(255,255,255,.06);backdrop-filter:blur(6px);border-top:1px solid rgba(255,255,255,.14)}
.hero-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:26px 0}
.stat{text-align:center}
.stat-num{font-size:clamp(24px,3vw,38px);font-weight:800;color:#fff;font-family:"DIN Alternate","Arial",sans-serif}
.stat-num i{font-style:normal;font-size:.6em;color:var(--green);margin-left:3px}
.stat-label{font-size:13px;color:#b9cde6;letter-spacing:1px}

/* ---------- 通用 Section ---------- */
.section{padding:84px 0}
.section-alt{background:var(--bg)}
.sec-head{text-align:center;margin-bottom:52px}
.sec-tag{display:inline-block;font-size:12px;letter-spacing:4px;color:var(--green-deep);font-weight:700;
  border:1px solid var(--green);border-radius:999px;padding:3px 16px;margin-bottom:12px}
.sec-head h2{font-size:clamp(26px,3.2vw,36px);letter-spacing:3px;color:var(--blue-dark)}
.sec-head h2::after{content:"";display:block;width:56px;height:4px;margin:14px auto 0;border-radius:2px;
  background:linear-gradient(90deg,var(--blue),var(--green))}
.sec-head p{color:var(--gray);margin-top:12px;font-size:15px}
.sec-head.light h2{color:#fff}
.sec-head.light p{color:#c8d8ea}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:start}
.about-text h3{color:var(--blue);font-size:20px;margin-bottom:16px;letter-spacing:1px}
.about-text p{margin-bottom:14px;color:#3c4c5e;text-align:justify}
.about-text b{color:var(--blue-deep)}
.about-points{margin-top:18px;list-style:none;display:grid;gap:10px}
.about-points li{background:#eef5fd;border-left:4px solid var(--blue);border-radius:0 10px 10px 0;padding:10px 16px;font-size:14.5px;color:#33475c}
.about-points b{color:var(--blue-deep);margin-right:8px}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.value-card{border-radius:var(--radius);padding:26px 20px;color:#fff;box-shadow:var(--shadow);transition:.3s}
.value-card:hover{transform:translateY(-6px)}
.vc-blue{background:linear-gradient(150deg,#1d6fd0,#0d3f8f)}
.vc-green{background:linear-gradient(150deg,#83bd52,#4e8027)}
.vc-icon{font-size:26px;opacity:.9}
.value-card h4{margin:8px 0 6px;font-size:17px;letter-spacing:2px}
.value-card p{font-size:13px;opacity:.92;line-height:1.7}

/* ---------- 核心业务 ---------- */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.biz-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.35s;display:flex;flex-direction:column}
.biz-card:hover{transform:translateY(-8px);box-shadow:0 18px 44px rgba(13,63,143,.16)}
.biz-img{position:relative;background:#f0f5fa;padding:14px;display:flex;align-items:center;justify-content:center;min-height:220px}
.biz-img img{max-height:230px;width:auto;object-fit:contain;transition:.4s}
.biz-card:hover .biz-img img{transform:scale(1.05)}
.biz-no{position:absolute;top:10px;right:14px;font-size:34px;font-weight:800;color:rgba(22,96,196,.14);font-family:Arial,sans-serif}
.biz-body{padding:22px 22px 24px}
.biz-body.full{padding-top:8px}
.biz-body h3{color:var(--blue-dark);font-size:18.5px;margin-bottom:10px;letter-spacing:1px;position:relative;padding-left:14px}
.biz-body h3::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--blue),var(--green))}
.biz-body p{font-size:14px;color:#4a5a6b;text-align:justify;margin-bottom:10px}
.biz-body b{color:var(--blue-deep)}
.formula{font-family:Consolas,monospace;font-size:12.5px;color:#4e6b2f;background:#f2f8ec;border-radius:6px;padding:5px 10px;margin-bottom:6px}
.biz-tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.biz-tags li{font-size:12px;color:var(--blue);background:#eaf1fb;border:1px solid #cfe0f5;border-radius:999px;padding:3px 12px}

/* ---------- 氢冶金项目 ---------- */
#hydrogen{background:linear-gradient(180deg,#f2f8ee 0%,#fff 30%)}
.hy-intro{background:linear-gradient(120deg,var(--blue-dark),var(--blue) 60%,#2e86e0);border-radius:18px;color:#fff;padding:36px 38px;box-shadow:var(--shadow)}
.hy-config h3{letter-spacing:3px;font-size:17px;color:#a8d5f5;margin-bottom:20px}
.config-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.cfg-item{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);border-radius:14px;padding:14px 20px;min-width:190px}
.cfg-num{font-size:40px;font-weight:800;color:#9ad26a;font-family:Arial,sans-serif}
.cfg-item b{display:block;font-size:16px;letter-spacing:1px}
.cfg-item em{font-style:normal;font-size:12.5px;color:#c9dcf2;line-height:1.6}
.cfg-arrow{font-size:26px;color:#9ad26a;font-weight:700}
.hy-note{margin-top:20px;font-size:13.5px;color:#b9d2ec;border-top:1px dashed rgba(255,255,255,.25);padding-top:14px}

.hy-kpi{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin:34px 0 44px}
.kpi{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;padding:24px 10px;border-top:4px solid var(--green);transition:.3s}
.kpi:hover{transform:translateY(-6px);border-top-color:var(--blue)}
.kpi-num{display:block;font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--blue-dark);font-family:"DIN Alternate",Arial,sans-serif}
.kpi-num i{font-style:normal;font-size:.55em;color:var(--green-deep);margin-left:3px}
.kpi-label{font-size:13px;color:var(--gray)}

.hy-detail{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:start}
.hy-left h3,.hy-right h3{color:var(--blue-dark);font-size:19px;letter-spacing:1px;margin:26px 0 16px;position:relative;padding-left:14px}
.hy-left h3::before,.hy-right h3::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--blue),var(--green))}
.tech-list{list-style:none;counter-reset:t;display:grid;gap:12px}
.tech-list li{counter-increment:t;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px 14px 54px;position:relative;font-size:14.5px;color:#3c4c5e;box-shadow:0 4px 14px rgba(13,63,143,.05)}
.tech-list li::before{content:counter(t,decimal-leading-zero);position:absolute;left:14px;top:12px;font-size:22px;font-weight:800;color:var(--green);font-family:Arial}
.tech-list b{color:var(--blue-deep)}

.cost-bars{display:grid;gap:10px}
.cb-row{display:grid;grid-template-columns:86px 1fr 120px;align-items:center;gap:12px;font-size:13.5px}
.cb-row span{color:var(--gray)}
.cb-track{background:#e8eef6;border-radius:999px;height:14px;overflow:hidden}
.cb-bar{height:100%;border-radius:999px;width:0;background:linear-gradient(90deg,var(--blue),#3f92e8);transition:width 1.2s ease}
.cb-bar.bar-green{background:linear-gradient(90deg,var(--green),#a4d377)}
.cb-row b{font-size:12.5px;color:var(--blue-dark);text-align:right;white-space:nowrap}
.reveal.visible .cb-bar{width:var(--w)}

.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:14px}
.spec-table th{background:linear-gradient(90deg,var(--blue-dark),var(--blue));color:#fff;padding:12px 18px;text-align:left;letter-spacing:2px}
.spec-table td{padding:11px 18px;border-bottom:1px solid var(--line);color:#3c4c5e}
.spec-table td:last-child{font-weight:700;color:var(--blue-deep)}
.spec-table tr:nth-child(even) td{background:#f7fafd}
.spec-table tr:last-child td{border-bottom:0}

.hy-quote{margin-top:20px;background:#f2f8ec;border-left:4px solid var(--green);border-radius:0 12px 12px 0;padding:16px 18px;font-size:14px;color:#3f5527}

/* ---------- 工程案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:230px;gap:18px}
.case-item{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin:0}
.case-item.tall{grid-row:span 2}
.case-item img{width:100%;height:100%;object-fit:cover;transition:.5s}
.case-item:hover img{transform:scale(1.07)}
.case-item figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 14px 10px;font-size:13px;color:#fff;letter-spacing:1px;
  background:linear-gradient(transparent,rgba(8,32,74,.85))}

/* ---------- 荣誉资质 ---------- */
.honor-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center}
.honor-img{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.honor-img img{border-radius:8px}
.honor-text h3{color:var(--blue-dark);font-size:21px;margin-bottom:14px;letter-spacing:1px}
.honor-text p{color:#3c4c5e;margin-bottom:18px;text-align:justify}
.honor-list{list-style:none;display:grid;gap:10px}
.honor-list li{position:relative;padding-left:30px;font-size:14.5px;color:#33475c}
.honor-list li::before{content:"✔";position:absolute;left:0;color:var(--green);font-weight:800}

/* 工商信息条 */
.reg-info{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
.reg-info div{background:#f2f7fd;border:1px solid var(--line);border-radius:10px;padding:12px 14px;text-align:center}
.reg-info b{display:block;font-size:12px;color:var(--gray);letter-spacing:1px;margin-bottom:4px}
.reg-info span{font-size:13px;font-weight:700;color:var(--blue-deep)}

/* 资质证书墙 */
.cert-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:56px;align-items:start}
.cert-item{margin:0;display:flex;flex-direction:column;gap:12px}
.cert-frame{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:0;transition:.35s;overflow:hidden;line-height:0}
.cert-item:hover .cert-frame{transform:translateY(-6px);box-shadow:0 16px 36px rgba(13,63,143,.18)}
.cert-frame img{width:100%;height:auto;display:block;border-radius:12px;aspect-ratio:4/5}
.cert-item figcaption{font-size:14px;font-weight:700;color:var(--blue-dark);text-align:center;line-height:1.5;min-height:3.2em;display:flex;flex-direction:column;justify-content:flex-start}
.cert-item figcaption small{display:block;font-size:11.5px;font-weight:400;color:var(--gray);margin-top:2px}
@media(max-width:1024px){
  .cert-grid{grid-template-columns:repeat(2,1fr)}
}

/* ---------- 联系 ---------- */
.contact-sec{background:linear-gradient(120deg,var(--blue-dark) 0%,var(--blue-deep) 55%,#14623b 130%);color:#fff}
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.contact-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius);padding:30px 20px;text-align:center;transition:.3s}
.contact-card:hover{background:rgba(255,255,255,.14);transform:translateY(-6px)}
.c-icon{font-size:30px;display:inline-block;margin-bottom:10px}
.contact-card h4{letter-spacing:2px;margin-bottom:8px;font-size:16px}
.contact-card p{font-size:14px;color:#cfe0f2;line-height:1.8}
.contact-card a{color:#9ad26a;font-weight:700}

/* ---------- 页脚 ---------- */
.footer{background:#081f45;color:#8fa8c7;padding:34px 0 26px}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand .brand-logo{padding:2px 6px}
.footer-brand .brand-logo img{height:36px}
.footer-brand strong{display:block;color:#fff;font-size:16px;letter-spacing:2px}
.footer-brand em{font-style:normal;font-size:10.5px;letter-spacing:1px;color:#5f7ba0}
.footer-nav{display:flex;gap:22px;font-size:13px;flex-wrap:wrap;justify-content:center}
.footer-nav a:hover{color:#9ad26a}
.copyright{font-size:12px;color:#587198}

/* ---------- 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .biz-grid{grid-template-columns:repeat(2,1fr)}
  .hy-kpi{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:200px}
}
@media(max-width:768px){
  .about-grid,.hy-detail,.honor-grid{grid-template-columns:1fr}
  .biz-grid{grid-template-columns:1fr}
  .hero-stats-grid{grid-template-columns:repeat(2,1fr);gap:18px}
  .hy-kpi{grid-template-columns:repeat(2,1fr)}
  .cb-row{grid-template-columns:70px 1fr 96px}
  .reg-info{grid-template-columns:1fr}
  .nav-toggle{display:flex}
  .nav-links{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:10px 5%;
    box-shadow:0 16px 30px rgba(13,63,143,.15);display:none;border-top:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px;border-radius:8px}
  .nav-links a.active{background:none;color:var(--blue)}
  .config-row{justify-content:center}
}