/* Top Sun Power - 拓普太阳能 | topsunpower.top */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:#1a2b4a;line-height:1.7;background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1240px;margin:0 auto;padding:0 20px}

/* ===== Top bar ===== */
.top-bar{background:#0a2656;color:#c9d4e8;font-size:13px;padding:8px 0}
.top-bar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.top-bar a{color:#ffb347}
.top-bar .tb-info span{margin-right:18px}

/* ===== Header ===== */
header{background:#fff;border-bottom:1px solid #eef2f8;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(10,38,86,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:20px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:44px;height:44px;background:linear-gradient(135deg,#1558c7 0%,#2d7fef 50%,#ffb347 100%);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px;box-shadow:0 6px 14px rgba(45,127,239,.3)}
.logo-text{line-height:1.15}
.logo-cn{font-size:20px;font-weight:700;color:#0a2656;letter-spacing:1px}
.logo-en{font-size:11px;color:#6b7a99;letter-spacing:2px;text-transform:uppercase}
.menu{display:flex;gap:32px}
.menu a{font-size:15px;font-weight:500;color:#1a2b4a;padding:10px 0;position:relative;transition:.3s}
.menu a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:#ffb347;transform:scaleX(0);transition:.3s}
.menu a:hover,.menu a.active{color:#1558c7}
.menu a:hover::after,.menu a.active::after{transform:scaleX(1)}
.cta-btn{background:linear-gradient(90deg,#ffb347,#ff8c1a);color:#fff;padding:11px 24px;border-radius:30px;font-size:14px;font-weight:600;box-shadow:0 6px 14px rgba(255,140,26,.3);transition:.3s;white-space:nowrap}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(255,140,26,.45)}
.menu-toggle{display:none;font-size:26px;background:none;border:none;color:#0a2656;cursor:pointer}

/* ===== Hero ===== */
.hero{position:relative;height:620px;background:linear-gradient(120deg,rgba(10,38,86,.78) 0%,rgba(21,88,199,.55) 55%,rgba(255,140,26,.25) 100%),url('https://images.unsplash.com/photo-1509391366360-2e959784a276?w=1800&auto=format&fit=crop') center/cover no-repeat;color:#fff;display:flex;align-items:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,179,71,.25),transparent 50%)}
.hero-inner{position:relative;z-index:2;max-width:720px}
.hero .tag{display:inline-block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);padding:6px 18px;border-radius:30px;font-size:13px;letter-spacing:3px;margin-bottom:22px;backdrop-filter:blur(6px)}
.hero h1{font-size:54px;font-weight:800;margin-bottom:18px;letter-spacing:3px;line-height:1.2;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero h1 em{font-style:normal;color:#ffb347}
.hero p{font-size:18px;max-width:600px;margin-bottom:32px;opacity:.95;line-height:1.8}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 34px;border-radius:30px;font-size:15px;font-weight:600;transition:.3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(90deg,#ffb347,#ff8c1a);color:#fff;box-shadow:0 8px 18px rgba(255,140,26,.35)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-outline{background:rgba(255,255,255,.1);color:#fff;border:2px solid rgba(255,255,255,.6);backdrop-filter:blur(6px)}
.btn-outline:hover{background:#fff;color:#0a2656}

/* Hero stats bar */
.hero-stats{position:absolute;left:0;right:0;bottom:0;z-index:2;background:linear-gradient(90deg,rgba(10,38,86,.92),rgba(21,88,199,.92));padding:22px 0;border-top:1px solid rgba(255,255,255,.15)}
.hero-stats .row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;color:#fff;text-align:center}
.hero-stats .num{font-size:30px;font-weight:800;color:#ffb347;line-height:1}
.hero-stats .lbl{font-size:13px;opacity:.85;margin-top:6px;letter-spacing:1px}

/* ===== Section base ===== */
.section{padding:90px 0}
.section.alt{background:#f5f8fd}
.section-title{text-align:center;margin-bottom:56px}
.section-title .sub{color:#ff8c1a;letter-spacing:4px;font-size:13px;text-transform:uppercase;font-weight:600}
.section-title h2{font-size:38px;color:#0a2656;margin:10px 0 14px;font-weight:700;letter-spacing:2px}
.section-title .line{width:60px;height:3px;background:linear-gradient(90deg,#1558c7,#ffb347);margin:0 auto}
.section-title p{max-width:640px;margin:20px auto 0;color:#5a6782;font-size:15px}

/* ===== Business blocks (业务板块) ===== */
.biz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.biz-card{background:#fff;border-radius:12px;padding:32px 26px;border:1px solid #e8eef8;transition:.35s;position:relative;overflow:hidden}
.biz-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,#1558c7,#ffb347);transform:scaleX(0);transform-origin:left;transition:.4s}
.biz-card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(10,38,86,.12);border-color:transparent}
.biz-card:hover::before{transform:scaleX(1)}
.biz-icon{width:64px;height:64px;border-radius:14px;background:linear-gradient(135deg,#e8f0ff,#fff3e0);display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:20px}
.biz-card h3{font-size:20px;color:#0a2656;margin-bottom:10px;font-weight:700}
.biz-card p{color:#5a6782;font-size:14px;line-height:1.8}

/* ===== Solutions ===== */
.solutions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.sol-card{position:relative;border-radius:14px;overflow:hidden;height:340px;background:#0a2656;cursor:pointer;transition:.35s}
.sol-card img{width:100%;height:100%;object-fit:cover;transition:.6s;opacity:.82}
.sol-card:hover img{transform:scale(1.08);opacity:.7}
.sol-card .overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(10,38,86,.92) 0%,rgba(10,38,86,.35) 50%,transparent 100%);padding:30px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}
.sol-card h3{font-size:22px;margin-bottom:8px;letter-spacing:1px}
.sol-card p{font-size:14px;opacity:.9;margin-bottom:14px}
.sol-card .more{color:#ffb347;font-size:13px;font-weight:600;letter-spacing:2px}
.sol-card .more::after{content:" →";transition:.3s}
.sol-card:hover .more::after{margin-left:6px}

/* ===== Cases ===== */
.cases-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:26px}
.case-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 6px 20px rgba(10,38,86,.08);transition:.35s}
.case-card:hover{transform:translateY(-6px);box-shadow:0 16px 36px rgba(10,38,86,.14)}
.case-img{height:220px;overflow:hidden;position:relative}
.case-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.case-card:hover .case-img img{transform:scale(1.06)}
.case-tag{position:absolute;top:14px;left:14px;background:rgba(255,140,26,.95);color:#fff;font-size:12px;padding:4px 12px;border-radius:4px;letter-spacing:1px}
.case-body{padding:22px}
.case-body h3{font-size:18px;color:#0a2656;margin-bottom:8px}
.case-body p{color:#5a6782;font-size:14px;margin-bottom:12px}
.case-meta{display:flex;justify-content:space-between;font-size:13px;color:#8a93ab;border-top:1px solid #eef2f8;padding-top:12px}

/* ===== About intro (home) ===== */
.about-intro{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-intro .img-wrap{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 20px 50px rgba(10,38,86,.18)}
.about-intro .img-wrap img{height:460px;object-fit:cover;width:100%}
.about-intro .img-wrap .badge{position:absolute;right:-20px;bottom:30px;background:#ffb347;color:#0a2656;padding:20px 28px;border-radius:10px;box-shadow:0 10px 30px rgba(255,140,26,.35);font-weight:700}
.about-intro .img-wrap .badge .big{font-size:36px;display:block;line-height:1}
.about-text .sub{color:#ff8c1a;letter-spacing:4px;font-size:13px;font-weight:600}
.about-text h2{font-size:36px;color:#0a2656;margin:12px 0 20px;line-height:1.3;font-weight:700}
.about-text > p{color:#5a6782;margin-bottom:16px;font-size:15px}
.about-features{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:28px 0}
.about-features li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:#1a2b4a}
.about-features .tick{color:#ff8c1a;font-size:20px;flex-shrink:0}

/* ===== Page banner ===== */
.page-banner{height:300px;background:linear-gradient(rgba(10,38,86,.75),rgba(10,38,86,.75)),url('https://images.unsplash.com/photo-1466611653911-95081537e5b7?w=1800&auto=format&fit=crop') center/cover;color:#fff;display:flex;align-items:center;justify-content:center;text-align:center}
.page-banner h1{font-size:44px;letter-spacing:4px;margin-bottom:10px}
.page-banner .crumb{opacity:.9;letter-spacing:2px;font-size:14px}
.page-banner .crumb a{color:#ffb347}

/* ===== About page ===== */
.about-block{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center;margin-bottom:70px}
.about-block.reverse{grid-template-columns:1fr 1.1fr}
.about-block.reverse .img-side{order:-1}
.about-block h3{font-size:28px;color:#0a2656;margin-bottom:18px}
.about-block .sub{color:#ff8c1a;font-weight:600;letter-spacing:3px;font-size:13px}
.about-block p{color:#5a6782;margin-bottom:12px}
.about-block img{border-radius:12px;box-shadow:0 14px 36px rgba(10,38,86,.12);height:380px;width:100%;object-fit:cover}
.value-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px;margin-top:40px}
.value-card{text-align:center;padding:34px 22px;border-radius:12px;background:#fff;border:1px solid #e8eef8;transition:.3s}
.value-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(10,38,86,.1)}
.value-card .v-icon{font-size:40px;margin-bottom:14px}
.value-card h4{color:#0a2656;font-size:18px;margin-bottom:8px}
.value-card p{color:#5a6782;font-size:13px}

/* ===== Products page ===== */
.product-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px}
.prod-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(10,38,86,.08);transition:.35s;border:1px solid #eef2f8}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 16px 36px rgba(10,38,86,.14)}
.prod-img{height:240px;background:#f5f8fd;overflow:hidden}
.prod-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.prod-card:hover .prod-img img{transform:scale(1.06)}
.prod-body{padding:24px}
.prod-body .cat{color:#ff8c1a;font-size:12px;letter-spacing:2px;font-weight:600}
.prod-body h3{font-size:20px;color:#0a2656;margin:8px 0 12px}
.prod-body p{color:#5a6782;font-size:14px;margin-bottom:16px}
.prod-specs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.prod-specs span{background:#f0f5fd;color:#1558c7;font-size:12px;padding:4px 10px;border-radius:4px}
.prod-body .link{color:#1558c7;font-size:14px;font-weight:600}
.prod-body .link::after{content:" →"}

/* ===== Solutions page ===== */
.sol-block{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;margin-bottom:60px;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 8px 24px rgba(10,38,86,.06)}
.sol-block.reverse{grid-template-columns:1fr 1fr}
.sol-block.reverse .sb-img{order:-1}
.sol-block .sb-img{height:360px}
.sol-block .sb-img img{width:100%;height:100%;object-fit:cover}
.sol-block .sb-text{padding:40px 40px 40px 0}
.sol-block.reverse .sb-text{padding:40px 0 40px 40px}
.sol-block .sub{color:#ff8c1a;letter-spacing:3px;font-size:12px;font-weight:600}
.sol-block h3{font-size:28px;color:#0a2656;margin:10px 0 16px}
.sol-block p{color:#5a6782;margin-bottom:14px;font-size:15px}
.sol-block ul.bullets{margin:14px 0 20px;padding-left:0}
.sol-block ul.bullets li{padding:6px 0 6px 26px;position:relative;color:#1a2b4a;font-size:14px}
.sol-block ul.bullets li::before{content:"☀";position:absolute;left:0;color:#ff8c1a;font-size:16px}

/* ===== Contact page ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:40px}
.contact-info{background:linear-gradient(135deg,#0a2656,#1558c7);color:#fff;padding:40px;border-radius:14px}
.contact-info h3{font-size:24px;margin-bottom:10px}
.contact-info > p{opacity:.85;margin-bottom:26px;font-size:14px}
.contact-info ul li{display:flex;gap:14px;margin-bottom:22px;align-items:flex-start}
.contact-info .ci-icon{width:40px;height:40px;background:rgba(255,179,71,.2);border:1px solid rgba(255,179,71,.4);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-info .ci-label{font-size:12px;opacity:.7;letter-spacing:1px;text-transform:uppercase}
.contact-info .ci-value{font-size:15px;margin-top:2px}
.contact-form{background:#fff;padding:40px;border-radius:14px;box-shadow:0 10px 30px rgba(10,38,86,.08)}
.contact-form h3{font-size:24px;color:#0a2656;margin-bottom:10px}
.contact-form > p{color:#5a6782;margin-bottom:22px;font-size:14px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;color:#0a2656;font-size:14px;font-weight:600;margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1px solid #d9e1f0;border-radius:8px;font-size:14px;font-family:inherit;transition:.3s;background:#f8fafd}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#1558c7;background:#fff;box-shadow:0 0 0 3px rgba(21,88,199,.1)}
.form-group textarea{resize:vertical;min-height:120px}
.map-block{margin-top:40px;height:340px;border-radius:14px;overflow:hidden;background:#eef2f8;display:flex;align-items:center;justify-content:center;color:#5a6782}
.map-block img{width:100%;height:100%;object-fit:cover}

/* ===== CTA strip ===== */
.cta-strip{background:linear-gradient(120deg,#0a2656 0%,#1558c7 60%,#ff8c1a 120%);padding:60px 0;color:#fff}
.cta-strip .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
.cta-strip h3{font-size:28px;margin-bottom:6px}
.cta-strip p{opacity:.9;font-size:15px}

/* ===== Footer ===== */
footer{background:#071c3f;color:#a8b5cf;padding:60px 0 20px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;margin-bottom:40px}
.footer-grid h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-grid h4::after{content:"";position:absolute;left:0;bottom:0;width:30px;height:2px;background:#ffb347}
.footer-col p{margin-bottom:10px;line-height:1.8}
.footer-col ul li{margin-bottom:10px}
.footer-col a{transition:.2s}
.footer-col a:hover{color:#ffb347;padding-left:4px}
.footer-logo{font-size:22px;color:#fff;font-weight:700;margin-bottom:14px;letter-spacing:1px}
.footer-contact li{display:flex;gap:10px;align-items:flex-start}
.footer-contact .fc-icon{color:#ffb347;flex-shrink:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#7686a6;font-size:13px}
.footer-bottom a{color:#ffb347}

/* ===== Responsive ===== */
@media(max-width:960px){
  .menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;gap:0;box-shadow:0 6px 18px rgba(10,38,86,.1)}
  .menu.open{display:flex}
  .menu a{padding:14px 0;border-bottom:1px solid #eef2f8}
  .menu-toggle{display:block}
  .nav{position:relative}
  .hero h1{font-size:38px;letter-spacing:2px}
  .hero p{font-size:16px}
  .hero{height:auto;padding:80px 0 160px}
  .hero-stats .row{grid-template-columns:repeat(2,1fr);gap:22px}
  .section{padding:60px 0}
  .section-title h2{font-size:28px}
  .about-intro,.about-block,.about-block.reverse,.sol-block,.sol-block.reverse,.contact-grid{grid-template-columns:1fr;gap:30px}
  .about-block.reverse .img-side,.sol-block.reverse .sb-img{order:0}
  .sol-block .sb-text,.sol-block.reverse .sb-text{padding:0 24px 30px}
  .sol-block .sb-img{height:240px}
  .about-intro .img-wrap img{height:320px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .form-row{grid-template-columns:1fr}
  .cta-strip .container{text-align:center;justify-content:center}
  .page-banner{height:220px}
  .page-banner h1{font-size:30px}
}
@media(max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .hero-stats .row{grid-template-columns:1fr 1fr}
  .logo-en{display:none}
  .biz-grid,.solutions-grid,.cases-grid,.product-list{grid-template-columns:1fr}
}