/* Tongliang Waterproofing — English site */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --blue:#1e9de4;--darkblue:#0d65b5;--navy:#0a4d8c;
  --text:#333;--muted:#666;--light:#f4f9fd;--border:#e3eef6;
}
html{scroll-behavior:smooth}
body{font-family:"Helvetica Neue",Arial,"Segoe UI",Roboto,sans-serif;color:var(--text);line-height:1.7;font-size:16px;background:#fff}
img{max-width:100%;display:block}
a{color:var(--darkblue);text-decoration:none}
a:hover{color:var(--blue)}
h1,h2,h3,h4{line-height:1.3;color:#143b5c;font-weight:700}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:70px 0}
.section-alt{background:var(--light)}
.section-head{text-align:center;max-width:760px;margin:0 auto 50px}
.section-head h2{font-size:32px;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:17px}
.section-head .accent{display:inline-block;width:56px;height:4px;background:var(--blue);border-radius:2px;margin-top:14px}
.lead{font-size:18px;color:var(--muted)}

/* Buttons */
.btn{display:inline-block;padding:13px 30px;border-radius:4px;font-weight:600;font-size:15px;transition:.25s;border:2px solid transparent;cursor:pointer}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--darkblue);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(30,157,228,.35)}
.btn-outline{border-color:#fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--darkblue)}
.btn-dark{background:var(--darkblue);color:#fff}
.btn-dark:hover{background:var(--navy);color:#fff}

/* Top bar */
.topbar{background:var(--navy);color:#cfe6f8;font-size:13.5px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.topbar a{color:#fff;font-weight:600}
.topbar .tb-left span{margin-right:22px}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 12px rgba(13,101,181,.08)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:82px}
.logo{display:flex;flex-direction:column;line-height:1.2}
.logo .brand{font-size:22px;font-weight:800;color:var(--darkblue);letter-spacing:.3px}
.logo .sub{font-size:11px;color:var(--muted);letter-spacing:2.5px;text-transform:uppercase}
.main-nav ul{display:flex;list-style:none;gap:4px}
.main-nav a{display:block;padding:10px 14px;font-size:15px;font-weight:600;color:#2a4a63;border-radius:4px}
.main-nav a:hover,.main-nav a.active{color:var(--blue);background:var(--light)}
.header-right{display:flex;align-items:center;gap:14px}
.lang-switch{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--darkblue);border:1.5px solid var(--blue);padding:7px 14px;border-radius:30px;transition:.25s;white-space:nowrap}
.lang-switch:hover{background:var(--blue);color:#fff}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:6px}
.nav-toggle span{width:26px;height:3px;background:var(--darkblue);border-radius:2px;transition:.3s}

/* Hero */
.hero{position:relative;background:linear-gradient(120deg,rgba(10,77,140,.94),rgba(13,101,181,.82) 55%,rgba(30,157,228,.65)),url("../assets/hero-bg.jpg") center/cover;color:#fff;padding:120px 0;min-height:560px;display:flex;align-items:center}
.hero h1{color:#fff;font-size:46px;margin-bottom:20px;max-width:760px}
.hero p{font-size:19px;max-width:680px;margin-bottom:32px;color:#e3f1fb}
.hero .hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-badges{display:flex;gap:28px;margin-top:44px;flex-wrap:wrap}
.hero-badges div{font-size:15px;color:#cfe6f8}
.hero-badges strong{display:block;font-size:28px;color:#fff}

/* Page banner (inner pages) */
.page-banner{background:linear-gradient(120deg,rgba(10,77,140,.95),rgba(13,101,181,.78)),url("../assets/hero-bg.jpg") center/cover;color:#fff;padding:64px 0;text-align:center}
.page-banner h1{color:#fff;font-size:36px;margin-bottom:10px}
.page-banner p{color:#d8ebf9;font-size:17px;max-width:700px;margin:0 auto}
.breadcrumb{font-size:14px;color:#bcd7ee;margin-top:14px}
.breadcrumb a{color:#bcd7ee}
.breadcrumb a:hover{color:#fff}

/* Cards grid */
.grid{display:grid;gap:28px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 14px 32px rgba(13,101,181,.14);border-color:#c7e2f5}
.card-img{aspect-ratio:4/3;overflow:hidden;background:#eaf4fb}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-body{padding:22px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:19px;margin-bottom:10px}
.card-body p{color:var(--muted);font-size:14.5px;flex:1}
.card-body .more{margin-top:14px;font-weight:700;font-size:14px;color:var(--blue)}
.card-body .more::after{content:" \2192";transition:.2s}
.card:hover .more::after{margin-left:5px}

/* Feature / advantage cards */
.adv-card{text-align:center;padding:34px 24px;background:#fff;border-radius:8px;border:1px solid var(--border);transition:.3s;height:100%}
.adv-card:hover{box-shadow:0 14px 32px rgba(13,101,181,.13);transform:translateY(-5px)}
.adv-icon{width:70px;height:70px;margin:0 auto 20px;background:linear-gradient(135deg,var(--blue),var(--darkblue));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:30px;color:#fff}
.adv-card h3{font-size:19px;margin-bottom:10px}
.adv-card p{color:var(--muted);font-size:14.5px}

/* Process steps */
.process{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;counter-reset:step}
.step{text-align:center;position:relative;padding:0 6px}
.step .num{counter-increment:step;width:64px;height:64px;margin:0 auto 16px;border-radius:50%;background:#fff;border:3px solid var(--blue);color:var(--darkblue);font-size:24px;font-weight:800;display:flex;align-items:center;justify-content:center;position:relative;z-index:2;transition:.3s}
.step .num::before{content:counter(step,decimal-leading-zero)}
.step:not(:last-child) .num::after{content:"";position:absolute;top:50%;left:calc(50% + 32px);width:calc(100% + 20px - 52px);height:3px;background:var(--blue);z-index:-1}
.step h4{font-size:15.5px;margin-bottom:6px}
.step p{font-size:13px;color:var(--muted)}
.step:hover .num{background:var(--blue);color:#fff}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--darkblue),var(--blue));color:#fff;border-radius:10px;padding:50px 46px;display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:8px}
.cta-band p{color:#dceffa;font-size:16px}
.cta-band .btn{background:#fff;color:var(--darkblue)}
.cta-band .btn:hover{background:var(--navy);color:#fff}

/* Hotline strip */
.hotline-strip{display:block;background:linear-gradient(90deg,#0d65b5,#1e9de4);color:#fff;text-align:center;padding:18px 16px;font-size:20px;font-weight:700;letter-spacing:.5px}
.hotline-strip:hover{color:#fff;filter:brightness(1.08)}
.hotline-strip .hl-num{font-size:26px}

/* Content / article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.article-body h2{font-size:26px;margin:38px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--border)}
.article-body h3{font-size:20px;margin:28px 0 12px;color:var(--darkblue)}
.article-body p{margin-bottom:16px;color:#3a3a3a}
.article-body ul,.article-body ol{margin:0 0 16px 24px}
.article-body li{margin-bottom:8px}
.article-body strong{color:#143b5c}
.article-body .abstract{background:var(--light);border-left:4px solid var(--blue);padding:18px 22px;border-radius:0 6px 6px 0;margin-bottom:26px;font-size:15px}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 12px;text-align:left}
.article-body th{background:var(--light);color:var(--darkblue)}
.article-meta{color:var(--muted);font-size:14px;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.article-hero{border-radius:8px;overflow:hidden;margin-bottom:30px;aspect-ratio:16/7;background:#eaf4fb}
.article-hero img{width:100%;height:100%;object-fit:cover}

/* Sidebar */
.sidebar{position:sticky;top:104px}
.side-box{background:#fff;border:1px solid var(--border);border-radius:8px;padding:24px;margin-bottom:24px}
.side-box h3{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--blue);display:inline-block}
.side-box ul{list-style:none}
.side-box li{border-bottom:1px dashed var(--border);padding:10px 0;font-size:14.5px}
.side-box li:last-child{border-bottom:0}
.side-box li a{color:#3a5368}
.side-box li a:hover{color:var(--blue)}
.side-contact{background:linear-gradient(140deg,var(--darkblue),var(--blue));color:#fff;border-radius:8px;padding:26px;text-align:center}
.side-contact h3{color:#fff;border:0;margin-bottom:12px}
.side-contact p{font-size:14.5px;color:#dceffa;margin-bottom:8px}
.side-contact .phone{font-size:23px;font-weight:800;color:#fff;display:block;margin:10px 0}

/* Detail page */
.detail-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:start}
.detail-gallery img{border-radius:8px;width:100%;border:1px solid var(--border)}
.detail-info h1{font-size:30px;margin-bottom:14px}
.detail-info p{color:var(--muted);margin-bottom:18px}
.detail-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}
.detail-tags span{background:var(--light);border:1px solid var(--border);color:var(--darkblue);padding:6px 14px;border-radius:30px;font-size:13.5px;font-weight:600}
.spec-table{width:100%;border-collapse:collapse;margin:14px 0 24px}
.spec-table th,.spec-table td{border:1px solid var(--border);padding:11px 14px;text-align:left;font-size:14.5px}
.spec-table th{background:var(--light);width:34%;color:var(--darkblue)}
.detail-cta{background:var(--light);border:1px solid var(--border);border-radius:8px;padding:24px;text-align:center}
.detail-cta p{margin-bottom:14px;font-weight:600}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.about-img img{border-radius:8px;width:100%}
.fact-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.fact-strip .fact strong{display:block;font-size:40px;color:var(--blue);font-weight:800}
.fact-strip .fact span{color:var(--muted);font-size:15px}
.value-card{padding:28px;border:1px solid var(--border);border-radius:8px;height:100%;background:#fff}
.value-card h3{font-size:18px;margin-bottom:10px}
.value-card p{color:var(--muted);font-size:14.5px}

/* Cases */
.case-card .card-img{aspect-ratio:4/3;position:relative}
.case-tag{position:absolute;left:12px;top:12px;background:rgba(13,101,181,.9);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:start}
.contact-info-list{list-style:none}
.contact-info-list li{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-info-list .ci-icon{width:46px;height:46px;flex:none;background:var(--light);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px}
.contact-info-list h4{font-size:16px;margin-bottom:3px}
.contact-info-list p{color:var(--muted);font-size:15px}
.contact-info-list a{font-weight:600}
.qr-box{text-align:center;border:1px solid var(--border);border-radius:8px;padding:30px;background:#fff}
.qr-box img{width:210px;margin:0 auto 16px;border:1px solid var(--border);border-radius:6px}
.qr-box h3{font-size:18px;margin-bottom:6px}
.qr-box p{color:var(--muted);font-size:14px}
.map-note{background:var(--light);border-radius:8px;padding:22px;margin-top:22px;font-size:14.5px;color:var(--muted)}
.service-area{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.service-area span{background:#fff;border:1px solid var(--border);padding:7px 16px;border-radius:30px;font-size:14px;color:var(--darkblue);font-weight:600}

/* Footer */
.site-footer{background:#0c2f4a;color:#a9c4d8;padding:60px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:10px}
.site-footer a{color:#a9c4d8}
.site-footer a:hover{color:var(--blue)}
.footer-brand .brand{font-size:21px;font-weight:800;color:#fff;margin-bottom:6px}
.footer-brand .sub{font-size:11px;letter-spacing:2px;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8}
.footer-contact li{display:flex;gap:10px;align-items:flex-start}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:13.5px;color:#84a6bd}

/* Responsive */
@media (max-width:991px){
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .grid-3{grid-template-columns:repeat(2,1fr)}
 .process{grid-template-columns:repeat(3,1fr);gap:30px 20px}
 .step:not(:last-child) .num::after{display:none}
 .article-layout{grid-template-columns:1fr}
 .sidebar{position:static}
 .detail-layout,.about-grid,.contact-grid{grid-template-columns:1fr}
 .fact-strip{grid-template-columns:repeat(2,1fr);gap:30px}
 .footer-grid{grid-template-columns:1fr 1fr}
 .hero h1{font-size:36px}
}
@media (max-width:767px){
 .nav-toggle{display:flex}
 .main-nav{position:fixed;top:82px;left:0;right:0;background:#fff;box-shadow:0 12px 20px rgba(0,0,0,.12);max-height:0;overflow:hidden;transition:max-height .35s}
 .main-nav.open{max-height:80vh;overflow-y:auto}
 .main-nav ul{flex-direction:column;padding:10px 0}
 .main-nav a{padding:14px 24px}
 .section{padding:52px 0}
 .section-head h2{font-size:26px}
 .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
 .process{grid-template-columns:repeat(2,1fr)}
 .hero{padding:80px 0;min-height:auto}
 .hero h1{font-size:29px}
 .hero p{font-size:16.5px}
 .cta-band{padding:36px 26px;text-align:center;justify-content:center}
 .footer-grid{grid-template-columns:1fr}
 .topbar .tb-left span{display:block;margin:0}
 .hotline-strip{font-size:16px}
 .hotline-strip .hl-num{font-size:21px}
 .page-banner h1{font-size:27px}
}