/* Yipin PCB — Shenzhen Yipin Zhuoyan Electronics Co., Ltd. */
:root{
  --navy:#0b1f33; --navy-2:#12304d; --ink:#1b2a3a; --muted:#5a6b7d;
  --line:#dbe3ea; --bg:#f5f8fa; --white:#fff;
  --green:#0f7b4f; --green-2:#14a36a; --green-soft:#e6f4ed;
  --copper:#c8803a; --copper-soft:#fbf1e6;
  --radius:10px; --shadow:0 6px 24px rgba(11,31,51,.08);
  --max:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.6;font-size:17px}
img,svg{max-width:100%;display:block}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;color:var(--navy);margin:0 0 .5em}
h1{font-size:clamp(2rem,4.2vw,3.1rem);letter-spacing:-.02em}
h2{font-size:clamp(1.55rem,2.8vw,2.1rem);letter-spacing:-.01em}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(6px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:800;letter-spacing:.02em}
.brand:hover{text-decoration:none}
.brand img{height:38px;width:auto}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links a{display:block;padding:8px 11px;border-radius:6px;color:var(--ink);font-size:.95rem;font-weight:500}
.nav-links a:hover{background:var(--bg);text-decoration:none}
.nav-links a[aria-current="page"]{color:var(--green);font-weight:700}
.nav-links .btn{margin-left:8px;color:#fff}
.nav-links .btn[aria-current="page"]{color:#fff}
[hidden]{display:none!important}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--navy);margin:4px 0}

/* buttons */
.btn{display:inline-block;background:var(--green);color:#fff;font-weight:700;padding:13px 22px;border-radius:8px;border:0;cursor:pointer;font-size:1rem;line-height:1.3;text-align:center}
.btn:hover{background:var(--green-2);text-decoration:none}
.btn-sm{padding:9px 14px;font-size:.92rem}
.btn-ghost{background:transparent;color:var(--navy);border:1.5px solid var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}
.btn-light{background:#fff;color:var(--navy)}
.btn-light:hover{background:var(--green-soft)}

/* hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 70%,#173e60 100%);color:#d9e4ee;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.07) 1.2px,transparent 1.2px);background-size:22px 22px;pointer-events:none}
.hero .container{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-top:76px;padding-bottom:84px}
.hero h1{color:#fff}
.hero .lead{font-size:1.18rem;color:#c3d3e2;max-width:36em}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--copper);margin-bottom:14px}
.hero .eyebrow{color:#f0b77c}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px}
.hero-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.55)}
.hero-cta .btn-ghost:hover{background:#fff;color:var(--navy)}
.hero-points{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:.95rem;color:#b9cadb}
.hero-points li::before{content:"✓";color:var(--green-2);font-weight:800;margin-right:7px}
.hero-art{filter:drop-shadow(0 18px 40px rgba(0,0,0,.35))}

/* page hero (inner pages) */
.page-hero{background:var(--navy);color:#c3d3e2;padding:56px 0 48px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1.2px,transparent 1.2px);background-size:22px 22px}
.page-hero .container{position:relative}
.page-hero h1{color:#fff;font-size:clamp(1.8rem,3.4vw,2.5rem)}
.page-hero p{max-width:44em;font-size:1.1rem;margin:0}

/* sections */
.section{padding:76px 0}
.section-alt{background:var(--bg)}
.section-head{max-width:720px;margin-bottom:38px}
.section-head p{color:var(--muted);font-size:1.08rem}
.center{text-align:center;margin-left:auto;margin-right:auto}

.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.card h3{margin-top:14px}
.card p{color:var(--muted);margin:0}
.card ul{color:var(--muted);padding-left:1.1em;margin:.6em 0 0}
.icon{width:46px;height:46px;border-radius:10px;background:var(--green-soft);display:grid;place-items:center}
.icon svg{width:26px;height:26px}
.icon.copper{background:var(--copper-soft)}

/* split blocks */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.checklist{list-style:none;padding:0;margin:0}
.checklist li{position:relative;padding:0 0 12px 30px}
.checklist li::before{content:"";position:absolute;left:0;top:5px;width:18px;height:18px;border-radius:50%;background:var(--green-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3.2 3L15 6.5' fill='none' stroke='%230f7b4f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat}
.checklist.no li::before{background:#fdecec url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 6l8 8M14 6l-8 8' fill='none' stroke='%23b3261e' stroke-width='2.4' stroke-linecap='round'/%3E%3C/svg%3E") center/12px no-repeat}

/* steps */
.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:18px}
.steps.row{grid-template-columns:repeat(5,1fr)}
.steps li{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;position:relative}
.steps li::before{content:counter(step);display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;font-weight:800;margin-bottom:12px}
.steps li h3{font-size:1.05rem}
.steps li p{color:var(--muted);font-size:.95rem;margin:0}
.steps.long li{display:grid;grid-template-columns:52px 1fr;gap:6px 18px;padding:26px}
.steps.long li::before{grid-row:1/span 3;margin:0;width:44px;height:44px;font-size:1.1rem}
.steps.long li ul{margin:.4em 0 0;padding-left:1.1em;color:var(--muted);font-size:.95rem}

/* table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:.97rem}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--navy);color:#fff;font-weight:600}
tbody tr:nth-child(even){background:#fafcfd}
tbody tr:last-child td{border-bottom:0}
.note{font-size:.92rem;color:var(--muted);background:var(--copper-soft);border-left:4px solid var(--copper);padding:12px 16px;border-radius:6px;margin-top:18px}

/* faq */
.faq{max-width:820px}
.faq details{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:12px}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:700;color:var(--navy);list-style:none;position:relative;padding-right:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:22px;top:14px;font-size:1.4rem;color:var(--green)}
.faq details[open] summary::after{content:"–"}
.faq details > div{padding:0 22px 18px;color:var(--muted)}
.faq h2{margin-top:36px;font-size:1.3rem}
.faq h2:first-child{margin-top:0}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--green) 0%,#0c6a44 100%);color:#e6f4ed}
.cta-band .container{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-top:52px;padding-bottom:52px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .3em}
.cta-band p{margin:0;max-width:40em}
.cta-actions{display:flex;flex-direction:column;align-items:center;gap:10px}
.cta-alt{color:#e6f4ed;font-size:.92rem;text-decoration:underline}
.cta-alt:hover{color:#fff}

/* form */
.form-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:36px;align-items:start}
form.quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:16px 18px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-weight:600;font-size:.93rem;color:var(--navy)}
label .opt{font-weight:400;color:var(--muted)}
input,select,textarea{font:inherit;font-size:1rem;padding:11px 12px;border:1px solid #c6d2dc;border-radius:7px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid var(--green-2);outline-offset:0;border-color:var(--green-2)}
textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-5000px}
.form-actions{margin-top:22px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.form-hint{font-size:.9rem;color:var(--muted);margin:0}
.upload-note{grid-column:1/-1;background:var(--green-soft);border:1px dashed var(--green);border-radius:8px;padding:14px 16px;font-size:.94rem}
.upload-note strong{color:var(--navy)}
.form-status{margin-top:16px;padding:12px 16px;border-radius:7px;display:none}
.form-status.ok{display:block;background:var(--green-soft);color:#0b5a39}
.form-status.err{display:block;background:#fdecec;color:#8c1d16}
.side-box{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.side-box h3{margin-top:0}
.side-box + .side-box{margin-top:18px}
.side-box p,.side-box li{color:var(--muted);font-size:.95rem}

/* footer */
.site-footer{background:#081726;color:#9fb2c4;padding:52px 0 26px;font-size:.94rem}
.site-footer a{color:#d4e0ea}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px}
.site-footer h4{color:#fff;margin:0 0 12px;font-size:.95rem;letter-spacing:.04em}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:7px}
.footer-brand img{height:40px;margin-bottom:12px}
.legal{border-top:1px solid #1b3249;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.86rem}

/* misc */
.pill-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:16px 0 0}
.pill-list li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.9rem}
.kicker{font-weight:700;color:var(--copper);font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}
.muted{color:var(--muted)}
.quote-box{border-left:4px solid var(--green);padding:6px 0 6px 20px;font-size:1.1rem;color:var(--navy);margin:22px 0}

/* responsive */
@media (max-width:1020px){
  .steps.row{grid-template-columns:repeat(3,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1100px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px}
  .nav-links .btn{margin:8px 0 0}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px}
  .nav-links .btn{margin:8px 0 0}
  .hero .container{grid-template-columns:1fr;padding-top:52px;padding-bottom:60px;gap:36px}
  .hero-art{max-width:460px;margin:0 auto}
  .split,.form-grid{grid-template-columns:1fr}
  .g3{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  body{font-size:16px}
  .section{padding:56px 0}
  .g2,.g3,.g4,.steps.row,.fields{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .cta-band .btn{width:100%}
  .cta-actions{width:100%}
  form.quote{padding:22px}
  .steps.long li{grid-template-columns:1fr}
  .steps.long li::before{grid-row:auto}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* photo gallery */
.gallery{display:grid;gap:20px}
.gallery.g3{grid-template-columns:repeat(3,1fr)}
.gallery.g2{grid-template-columns:repeat(2,1fr)}
.photo{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.photo img{width:100%;height:240px;object-fit:cover;background:#eef2f5}
.photo figcaption{padding:10px 14px;font-size:.9rem;color:var(--muted)}
@media (max-width:900px){.gallery.g3{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.gallery.g3,.gallery.g2{grid-template-columns:1fr}.photo img{height:auto;max-height:320px}}
.gallery.g2 .photo img{height:300px}
/* v7: six-stage process strip */
.steps.row.six{grid-template-columns:repeat(6,1fr)}
.steps.row.six li{padding:20px 16px}
.process-starts{margin-top:22px;color:var(--muted)}
.card[id]{scroll-margin-top:90px}
@media (max-width:1020px){.steps.row.six{grid-template-columns:repeat(3,1fr)}}
@media (max-width:620px){.steps.row.six{grid-template-columns:1fr}}