/* ==========================================================================
   Jailey Power Electronics Testing — site stylesheet
   Palette: blue / gray / white — technical, minimal
   ========================================================================== */

:root {
  --navy:        #17492c;   /* primary dark blue */
  --blue:        #1e6b3a;   /* mid blue */
  --accent:      #8cc63f;   /* accent blue */
  --accent-soft: #eef6e2;   /* pale blue background */
  --ink:         #1f2933;   /* body text */
  --gray:        #5b6770;   /* secondary text */
  --line:        #d9dee3;   /* borders */
  --bg:          #ffffff;
  --bg-alt:      #f4f6f8;   /* light gray section background */
  --max-w:       1120px;
  --radius:      6px;
  font-size: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   Header / navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 3px solid var(--accent);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 2px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  flex: none;
}

.brand-sub {
  display: block;
  font-size: 0.68rem;
  font-weight: 400;
  color: #a9c4a0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: normal;
  line-height: 1.3;
  max-width: 280px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 4px;
  color: #fff;
  font-size: 1.3rem;
  line-height: 1;
  padding: 6px 10px;
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  color: #dcebd0;
  font-size: 0.92rem;
  border-radius: 4px;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}
.nav-links a[aria-current="page"] {
  color: #fff;
  background: rgba(140, 198, 63, 0.35);
}

.nav-links a.nav-cta {
  margin-left: 8px;
  background: var(--accent);
  color: #143c26;
  font-weight: 600;
}
.nav-links a.nav-cta:hover { background: #9ad04f; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  background:
    linear-gradient(rgba(23, 73, 44, 0.88), rgba(23, 73, 44, 0.93)),
    url("../images/hero-solar-field.jpg") center / cover no-repeat,
    var(--navy);
  color: #fff;
  padding: 88px 0 96px;
}

.hero .eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.2;
  font-weight: 650;
  max-width: 780px;
  margin-bottom: 20px;
}

.hero p.lead {
  font-size: 1.12rem;
  color: #d2e3c4;
  max-width: 680px;
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover { text-decoration: none; }

.btn-primary { background: var(--accent); color: #143c26; }
.btn-primary:hover { background: #9ad04f; }

.btn-outline { border-color: #a4c887; color: #f0f8e6; background: transparent; }
.btn-outline:hover { border-color: #fff; color: #fff; }

.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: #123a22; }

/* Key-facts strip under hero */
.fact-strip {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--line);
}
.fact-strip .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0;
}
.fact {
  padding: 22px 20px;
  border-left: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--gray);
}
.fact:first-child { border-left: none; }
.fact strong {
  display: block;
  color: var(--navy);
  font-size: 1rem;
  margin-bottom: 2px;
}

/* --------------------------------------------------------------------------
   Generic sections
   -------------------------------------------------------------------------- */

.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); }

.section-head { max-width: 720px; margin-bottom: 44px; }

.section-head .eyebrow,
.page-hero .eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-head p { color: var(--gray); }

/* Page hero (sub-pages) */
.page-hero {
  background: var(--navy);
  color: #fff;
  padding: 56px 0;
}

/* Page-hero theme images (navy overlay keeps text readable) */
.page-hero.ph-services {
  background:
    linear-gradient(rgba(23, 73, 44, 0.88), rgba(23, 73, 44, 0.92)),
    url("../images/pcb-macro-dark.jpg") center / cover no-repeat, var(--navy);
}
.page-hero.ph-about {
  background:
    linear-gradient(rgba(23, 73, 44, 0.9), rgba(23, 73, 44, 0.94)),
    url("../images/engineering-review.jpg") center / cover no-repeat, var(--navy);
}
.page-hero.ph-references {
  background:
    linear-gradient(rgba(23, 73, 44, 0.88), rgba(23, 73, 44, 0.92)),
    url("../images/solar-farm-aerial.jpg") center / cover no-repeat, var(--navy);
}
.page-hero.ph-contact {
  background:
    linear-gradient(rgba(23, 73, 44, 0.88), rgba(23, 73, 44, 0.92)),
    url("../images/solar-panel-closeup.jpg") center / cover no-repeat, var(--navy);
}

/* Content photos */
figure.photo {
  margin: 0;
}
figure.photo img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
figure.photo figcaption {
  font-size: 0.8rem;
  color: var(--gray);
  margin-top: 8px;
}
.split figure.photo { margin-top: 20px; }
.page-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 650;
  margin-bottom: 12px;
}
.page-hero p {
  color: #d2e3c4;
  max-width: 680px;
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px;
}

.card h3 {
  color: var(--navy);
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.35;
}

.card p { color: var(--gray); font-size: 0.94rem; }

.card .card-num {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.card ul {
  margin: 12px 0 0 18px;
  color: var(--gray);
  font-size: 0.92rem;
}
.card ul li { margin-bottom: 6px; }

/* Service detail blocks (services page) */
.service-block {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}
.service-block:last-child { border-bottom: none; }

.service-index {
  width: 56px;
  height: 56px;
  border: 2px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.service-block h3 {
  color: var(--navy);
  font-size: 1.25rem;
  margin-bottom: 10px;
}
.service-block p { color: var(--gray); margin-bottom: 10px; }
.service-block ul { margin: 8px 0 0 18px; color: var(--gray); font-size: 0.95rem; }
.service-block ul li { margin-bottom: 6px; }

/* --------------------------------------------------------------------------
   Two-column layout helper
   -------------------------------------------------------------------------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.split h2 {
  color: var(--navy);
  font-size: clamp(1.4rem, 2.6vw, 1.8rem);
  margin-bottom: 14px;
}
.split p { color: var(--gray); margin-bottom: 14px; }

/* Definition-style spec list */
.spec-list {
  list-style: none;
  border-top: 1px solid var(--line);
}
.spec-list li {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
}
.spec-list li span:first-child { color: var(--navy); font-weight: 600; }
.spec-list li span:last-child { color: var(--gray); }

/* Check list */
.check-list { list-style: none; }
.check-list li {
  position: relative;
  padding: 6px 0 6px 30px;
  color: var(--gray);
  font-size: 0.96rem;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 14px;
  height: 8px;
  border-left: 2.5px solid var(--accent);
  border-bottom: 2.5px solid var(--accent);
  transform: rotate(-45deg);
}
.check-list li strong { color: var(--ink); }

/* --------------------------------------------------------------------------
   References page
   -------------------------------------------------------------------------- */

.ref-card {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}
.ref-card h3 { color: var(--navy); font-size: 1.2rem; margin-bottom: 4px; }
.ref-card .ref-meta {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.ref-card p { color: var(--gray); font-size: 0.96rem; margin-bottom: 10px; }
.ref-card ul { margin: 8px 0 0 18px; color: var(--gray); font-size: 0.94rem; }
.ref-card ul li { margin-bottom: 6px; }

blockquote.pull {
  border-left: 3px solid var(--accent);
  padding: 6px 0 6px 20px;
  margin: 20px 0;
  color: var(--ink);
  font-size: 1.02rem;
  font-style: italic;
}
blockquote.pull footer {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--gray);
  margin-top: 8px;
}

/* --------------------------------------------------------------------------
   Contact page / form
   -------------------------------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2 { color: var(--navy); font-size: 1.4rem; margin-bottom: 14px; }
.contact-info p { color: var(--gray); margin-bottom: 18px; font-size: 0.96rem; }

.contact-details { list-style: none; margin-top: 8px; }
.contact-details li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
  color: var(--gray);
}
.contact-details li strong {
  display: block;
  color: var(--navy);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

form.inquiry {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-field { margin-bottom: 18px; }

.form-field label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}
.form-field label .req { color: #c0392b; }

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font: inherit;
  font-size: 0.94rem;
  color: var(--ink);
  background: #fff;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(140, 198, 63, 0.15);
}

.form-field textarea { resize: vertical; min-height: 140px; }

.form-note { font-size: 0.82rem; color: var(--gray); margin: 4px 0 18px; }

.form-status {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 4px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--navy);
  font-size: 0.92rem;
}
.form-status.visible { display: block; }

/* --------------------------------------------------------------------------
   CTA band
   -------------------------------------------------------------------------- */

.cta-band {
  background: var(--navy);
  color: #fff;
  padding: 56px 0;
}
.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: 1.5rem; font-weight: 650; margin-bottom: 6px; }
.cta-band p { color: #d2e3c4; max-width: 560px; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: #0f3520;
  color: #a9c4a0;
  padding: 48px 0 28px;
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 36px;
  margin-bottom: 36px;
}

.site-footer h4 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 8px; }
.site-footer a { color: #a9c4a0; }
.site-footer a:hover { color: #fff; }

.footer-brand p { max-width: 320px; margin-top: 12px; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: #8aa37c;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .split, .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .spec-list li { grid-template-columns: 1fr; gap: 2px; }
}

@media (max-width: 760px) {
  .hero { padding: 64px 0 72px; }
  .section { padding: 56px 0; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .service-block { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Language switch (EN / ZH)
   -------------------------------------------------------------------------- */

.nav-bar { position: relative; flex-wrap: nowrap; }
.brand { order: 0; margin-right: auto; }
.nav-links { order: 1; }
.lang-switch {
  display: flex;
  order: 2;
  flex: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 4px;
  overflow: hidden;
}
.lang-switch button {
  background: transparent;
  border: none;
  color: #d2e3c4;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  cursor: pointer;
}
.lang-switch button.active { background: var(--accent); color: #143c26; }
.lang-switch button:not(.active):hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.nav-toggle { order: 3; }
html[lang="zh-CN"] body { font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; }

/* Collapse to a hamburger menu below 980px so the full nav never crowds the brand */
@media (max-width: 980px) {
  .nav-toggle { display: block; order: 3; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--navy);
    border-bottom: 3px solid var(--accent);
    padding: 8px 16px 16px;
    gap: 2px;
    z-index: 200;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-links a.nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
}

/* Tiny screens: drop the subtitle and tighten spacing so nothing overflows */
@media (max-width: 430px) {
  .container { padding: 0 16px; }
  .nav-bar { gap: 10px; }
  .brand { font-size: 0.95rem; gap: 8px; }
  .brand-mark { height: 30px; }
  .brand-sub { display: none; }
  .lang-switch button { padding: 6px 9px; font-size: 0.75rem; }
  .nav-toggle { padding: 6px 9px; }
}

@media (max-width: 360px) {
  .brand { font-size: 0.85rem; gap: 6px; }
  .brand-mark { height: 27px; }
  .nav-bar { gap: 8px; }
}

/* Photo band */
.photo-band { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.photo-band img { width: 100%; height: 280px; object-fit: cover; display: block; }
@media (max-width: 760px) {
  .photo-band { grid-template-columns: 1fr; }
  .photo-band img { height: 180px; }
}

/* Service block photos */
.service-block { grid-template-columns: 64px 1fr 260px; align-items: start; }
.service-photo { width: 100%; height: 190px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line); }
@media (max-width: 900px) {
  .service-block { grid-template-columns: 64px 1fr; }
  .service-photo { grid-column: 1 / -1; height: 200px; }
}
@media (max-width: 760px) {
  .service-block { grid-template-columns: 1fr; }
  .service-photo { grid-column: auto; }
}

/* Brand logo (DY Renewables) */
.brand-mark { border: none; width: auto; height: 36px; color: #fff; }
.brand-mark svg { height: 100%; width: auto; display: block; }

/* Darker leaf tone for accents on white backgrounds */
.section-head .eyebrow { color: #4e9126; }
.card .card-num { color: #4e9126; }
.service-index { border-color: #6aa832; color: #4e9126; }
.check-list li::before { border-left-color: #6aa832; border-bottom-color: #6aa832; }
.ref-card .ref-meta { color: #4e9126; }

/* Contact page photo: centered, height-limited (suits portrait images) */
.contact-info figure.photo { text-align: center; }
.contact-info figure.photo img {
  width: auto;
  max-width: 100%;
  max-height: 420px;
  margin: 0 auto;
}

/* Footer logo */
.footer-logo { display: block; height: 38px; color: #fff; margin-bottom: 14px; }
.footer-logo svg { height: 100%; width: auto; display: block; }