/* Southwind EV — B2B charging hardware, light industrial system */
:root{
  --ink:#0d211c; --ink-2:#16362d; --muted:#5f736b; --line:#dfe7e2;
  --paper:#f6f8f6; --white:#fff; --lime:#b9f36b; --lime-dk:#5f9e27;
  --teal:#124b3f; --warn:#b45309;
  --r:8px; --wrap:1200px;
  --shadow:0 1px 2px rgba(13,33,28,.05),0 12px 28px -18px rgba(13,33,28,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:min(var(--wrap),92%);margin:0 auto}
h1,h2,h3,h4{margin:0;line-height:1.14;letter-spacing:-.02em;font-weight:800}
h1{font-size:clamp(34px,4.6vw,58px)}
h2{font-size:clamp(26px,3.2vw,38px)}
h3{font-size:19px;line-height:1.3}
p{margin:0 0 14px}
.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:var(--lime-dk)}
.lead{font-size:18px;color:var(--muted);max-width:64ch}
.small{font-size:13.5px;color:var(--muted)}

/* header */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.navin{display:flex;align-items:center;gap:26px;height:70px}
.logo{display:flex;align-items:baseline;gap:6px;font-weight:900;font-size:21px;letter-spacing:-.03em;white-space:nowrap}
.logo b{color:var(--ink)}.logo i{font-style:normal;color:#6aa83a}
.logo em{font-style:normal;font-size:10px;letter-spacing:.14em;color:#8aa096;font-weight:800}
.navlinks{display:flex;gap:22px;font-size:14px;font-weight:600;margin-left:auto}
.navlinks a{color:#33473f;padding:6px 0;border-bottom:2px solid transparent}
.navlinks a:hover{color:var(--ink);border-color:var(--lime)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 20px;border-radius:6px;
  font-weight:800;font-size:14.5px;border:1px solid transparent;cursor:pointer;transition:.15s}
.btn.primary{background:var(--ink);color:#fff}
.btn.primary:hover{background:#1a3f34}
.btn.lime{background:var(--lime);color:var(--ink)}
.btn.lime:hover{filter:brightness(1.05)}
.btn.ghost{border-color:#c3d2ca;color:var(--ink);background:#fff}
.btn.clear{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn.clear:hover{background:rgba(255,255,255,.1)}
.btn.ghost:hover{border-color:var(--ink)}
.btn.sm{padding:9px 14px;font-size:13px}
.navcta{margin-left:22px}
@media(max-width:1000px){.navlinks{display:none}.navcta{margin-left:auto}}

/* hero */
.hero{background:linear-gradient(160deg,#0b1f1a 0%,#124b3f 55%,#16614f 100%);color:#fff;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 78% 30%,rgba(185,243,107,.18),transparent 45%),
             radial-gradient(circle at 12% 88%,rgba(185,243,107,.08),transparent 40%)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:72px 0 64px}
.hero h1{color:#fff;max-width:19ch}
.hero h1 span{color:var(--lime)}
.hero .lead{color:#c8dcd3;margin:18px 0 26px;font-size:17.5px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  border-radius:999px;padding:7px 12px;font-size:12.5px;font-weight:700;color:#dff0e6}
.hero-visual{position:relative;isolation:isolate}
/* 产品后方的柔光，让抠图自然融进深绿背景 */
.hero-visual:before{content:"";position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);
  width:88%;aspect-ratio:1/1;border-radius:50%;z-index:-1;
  background:radial-gradient(circle,rgba(185,243,107,.16) 0%,rgba(185,243,107,.07) 42%,rgba(185,243,107,0) 68%)}
/* 地面接触阴影，避免产品"飘"在背景上 */
.hero-visual:after{content:"";position:absolute;left:14%;right:14%;bottom:3%;height:34px;z-index:-1;
  background:radial-gradient(ellipse at center,rgba(0,0,0,.55) 0%,rgba(0,0,0,0) 72%);
  filter:blur(6px)}
.hero-visual img{width:100%;max-height:440px;object-fit:contain;position:relative;
  filter:drop-shadow(0 18px 22px rgba(0,0,0,.40)) drop-shadow(0 2px 4px rgba(0,0,0,.25))}
.hero-badge{position:absolute;top:-8px;right:0;background:var(--lime);color:var(--ink);z-index:3;
  font-size:12px;font-weight:900;padding:9px 14px;border-radius:999px;box-shadow:0 10px 24px rgba(0,0,0,.35)}
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;padding:44px 0 48px;gap:26px}
  .hero-visual{order:-1}.hero-visual img{max-height:280px}
  .hero h1{max-width:22ch}.hero-badge{position:static;display:inline-block;margin-bottom:10px}
}

/* fact bar */
.facts{background:#fff;border-bottom:1px solid var(--line)}
.facts .wrap{display:grid;grid-template-columns:repeat(5,1fr);gap:0;padding:0}
.fact{padding:22px 18px;border-right:1px solid var(--line)}
.fact:last-child{border-right:0}
.fact b{display:block;font-size:23px;letter-spacing:-.02em}
.fact span{font-size:12.5px;color:var(--muted);line-height:1.35;display:block;margin-top:3px}
@media(max-width:820px){.facts .wrap{grid-template-columns:repeat(2,1fr)}.fact{border-bottom:1px solid var(--line)}}

/* sections */
section{padding:64px 0}
.sec-head{max-width:70ch;margin-bottom:30px}
.sec-head h2{margin:10px 0 12px}

/* product cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:980px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  display:flex;flex-direction:column;transition:.18s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:#cbd9d1}
.card .ph{background:#fff;border-bottom:1px solid #eef2f0;padding:14px;display:grid;place-items:center}
.card .ph img{height:180px;width:100%;object-fit:contain}
.card .bd{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{font-size:18px}
.card p{font-size:14px;color:var(--muted);margin:0}
.card .meta{font-size:12px;font-weight:800;color:#34603f;background:#eef7e6;
  border-radius:4px;padding:5px 8px;align-self:flex-start;letter-spacing:.01em}
.card .go{margin-top:auto;padding-top:10px;font-size:13.5px;font-weight:800;color:var(--lime-dk)}

/* table */
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:620px}
/* 表格横向滚动容器：手机上只让表格自己横滑，不让整页溢出 */
.tw{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;
  border-radius:8px;border:1px solid var(--line);margin:10px 0}
.tw table{border:0;margin:0}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid #eef2f0;vertical-align:top}
th{background:#f2f6f3;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:#436053;font-weight:800}
tr:last-child td{border-bottom:0}
td b{font-weight:800}
.tbl-note{font-size:12.5px;color:var(--muted);margin-top:10px}

/* value list */
.vals{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(max-width:760px){.vals{grid-template-columns:1fr}}
.val{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.val h3{font-size:16.5px;margin-bottom:8px;display:flex;gap:9px;align-items:center}
.val h3 i{width:22px;height:22px;border-radius:50%;background:var(--lime);color:var(--ink);
  font-style:normal;font-size:12px;display:grid;place-items:center;font-weight:900;flex:none}
.val p{font-size:14px;color:var(--muted);margin:0}

/* gallery */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.gal img{height:170px;width:100%;object-fit:cover;border-radius:6px;border:1px solid var(--line)}
.gal figure{margin:0}
.gal figcaption{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.35}
@media(max-width:900px){.gal{grid-template-columns:repeat(2,1fr)}}

/* process */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 16px}
.step:before{counter-increment:s;content:"0" counter(s);font-size:12px;font-weight:900;color:var(--lime-dk)}
.step b{display:block;margin:6px 0 5px;font-size:14.5px}
.step span{font-size:12.5px;color:var(--muted);line-height:1.4}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}

/* cta band */
.band{background:var(--ink);color:#fff}
.band .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;padding:56px 0}
.band h2{color:#fff}.band p{color:#b9cec5}
.band-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
@media(max-width:820px){.band .wrap{grid-template-columns:1fr}.band-actions{justify-content:flex-start}}

/* form */
.formcard{background:#fff;border:1px solid var(--line);border-radius:10px;padding:26px;box-shadow:var(--shadow)}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.fgrid .wide{grid-column:1/-1}
label{font-size:13px;font-weight:800;display:block}
input,select,textarea{width:100%;margin-top:6px;padding:11px 12px;border:1px solid #c6d4cc;
  border-radius:6px;font:inherit;font-size:14.5px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid #cbe98f;border-color:#7aaa3c}
textarea{min-height:96px;resize:vertical}
.formnote{font-size:12.5px;color:var(--muted)}
@media(max-width:640px){.fgrid{grid-template-columns:1fr}}

/* faq */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:820px){.faq{grid-template-columns:1fr}}
details{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
summary{cursor:pointer;font-weight:800;font-size:15px}
details p{font-size:14px;color:var(--muted);margin:10px 0 0}

/* product page hero */
.phero{background:#fff;border-bottom:1px solid var(--line)}
.phero .wrap{display:grid;grid-template-columns:1fr .9fr;gap:40px;align-items:center;padding:48px 0}
.crumb{font-size:12.5px;color:var(--muted);margin-bottom:14px}
.crumb a{text-decoration:underline;text-decoration-color:#c8d6ce;text-underline-offset:3px}
.phero img{width:100%;height:auto;max-height:420px;object-fit:contain;background:#fff;border:1px solid #eef2f0;border-radius:10px}
@media(max-width:860px){.phero .wrap{grid-template-columns:1fr;padding:32px 0}.phero img{height:auto}}

/* sticky quote bar */
.qbar{position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);
  padding:9px 0;display:none}
.qbar .wrap{display:flex;gap:10px;align-items:center;justify-content:space-between}
.qbar span{font-size:13px;font-weight:700}
@media(max-width:820px){.qbar{display:block}body{padding-bottom:60px}}

/* footer */
footer.site{background:#0b1e19;color:#a9c2b7;padding:48px 0 26px;font-size:13.5px}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding-bottom:28px;border-bottom:1px solid #1d3a30}
footer.site h4{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px}
footer.site a:hover{color:var(--lime)}
footer.site .logo{color:#fff;margin-bottom:12px}
footer.site .logo b{color:#fff}
footer.site .logo i{color:var(--lime)}
footer.site .addr{line-height:1.7}
footer.site .copy{padding-top:18px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7f9a8f}
@media(max-width:900px){footer.site .cols{grid-template-columns:1fr 1fr}}

/* utility */
.mt0{margin-top:0}.mb0{margin-bottom:0}
.pill{display:inline-block;background:#eef7e6;color:#3c6b2a;border-radius:999px;padding:5px 11px;font-size:12px;font-weight:800}
.hr{height:1px;background:var(--line);margin:30px 0}
.note{background:#fffaf0;border:1px solid #f2dfb8;border-left:4px solid var(--warn);
  border-radius:6px;padding:12px 14px;font-size:13.5px;color:#6b4a10}
.kv{display:grid;grid-template-columns:180px 1fr;gap:6px 16px;font-size:14px}
.kv dt{color:var(--muted);font-weight:700}.kv dd{margin:0}
@media(max-width:640px){.kv{grid-template-columns:1fr}}

/* responsive two-column splits used across pages */
.split2{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
@media(max-width:900px){.split2{grid-template-columns:1fr;gap:26px}}
.phero .wrap.split2{align-items:center}

/* ===== mobile nav (hamburger + drawer) ===== */
.navtoggle{display:none;width:42px;height:42px;margin-left:14px;padding:0;border:1px solid #dce6e1;
  border-radius:8px;background:#fff;cursor:pointer;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;flex:0 0 auto;-webkit-tap-highlight-color:transparent}
.navtoggle span{display:block;width:18px;height:2px;background:#10251f;border-radius:2px;
  transition:transform .22s ease,opacity .15s ease}
header.nav-open .navtoggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
header.nav-open .navtoggle span:nth-child(2){opacity:0}
header.nav-open .navtoggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(max-width:1000px){
  .navtoggle{display:flex}
  header.nav-open .navlinks{display:flex;position:absolute;left:0;right:0;top:100%;margin:0;
    padding:6px 4% 16px;flex-direction:column;gap:0;background:#fff;border-top:1px solid #dce6e1;
    box-shadow:0 20px 32px rgba(16,37,31,.14);max-height:calc(100vh - 70px);overflow:auto}
  header.nav-open .navlinks a{padding:14px 0;border-bottom:1px solid #eef3f0;font-size:16px}
  header.nav-open .navlinks a:last-child{border-bottom:0}
}
@media(max-width:1000px){
  .navcta{margin-left:auto;font-size:13px;padding:9px 12px;white-space:nowrap}
  .navin{gap:12px}
}
@media(max-width:360px){ .navcta{font-size:12px;padding:8px 10px} }

/* 窄屏：CTA 收进抽屉，头部只留 logo + 汉堡 */
.menu-cta{display:none}
@media(max-width:1000px){
  .navcta{display:none}
  header.nav-open .navlinks .menu-cta{display:block;margin:14px 0 4px;text-align:center;
    background:var(--ink);color:#fff;border:0;border-radius:6px;padding:13px 16px;font-weight:800}
}