:root {
  color-scheme: light;
  --bg: #f5f6f1;
  --surface: #fffdfa;
  --surface-strong: #ffffff;
  --ink: #171511;
  --muted: #625d55;
  --line: #ded8cb;
  --charcoal: #161411;
  --charcoal-2: #292117;
  --gold: #c99a37;
  --gold-deep: #82591e;
  --emerald: #176b5d;
  --ruby: #7e3035;
  --mist: #edf2ee;
  --shadow: 0 18px 44px rgba(23, 21, 17, 0.1);
  font-family: "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(23, 21, 17, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(23, 21, 17, 0.03) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  color: var(--ink);
  line-height: 1.68;
  letter-spacing: 0;
}

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

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(222, 216, 203, 0.9);
  background: rgba(255, 253, 250, 0.94);
  backdrop-filter: blur(14px);
}

.topbar-inner {
  min-height: 68px;
  display: grid;
  grid-template-columns: minmax(210px, 1fr) auto auto;
  gap: 22px;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: #fffdfa;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  box-shadow: inset 0 0 0 2px rgba(255, 253, 250, 0.28);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.nav a {
  text-decoration: none;
}

.nav a:hover {
  color: var(--gold-deep);
}

.header-call,
.call-link,
.ghost-link,
.cta-strip a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 900;
  text-decoration: none;
}

.header-call {
  border: 1px solid rgba(201, 154, 55, 0.45);
  color: var(--gold-deep);
  background: #fff8e7;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 610px;
  display: grid;
  align-items: center;
  padding: 92px 0 86px;
  color: #fffdfa;
  background-image:
    linear-gradient(90deg, rgba(18, 16, 13, 0.9), rgba(18, 16, 13, 0.7) 46%, rgba(18, 16, 13, 0.35)),
    url("/assets/gold-recycle-hero.png");
  background-position: center;
  background-size: cover;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--gold), var(--emerald), var(--ruby));
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-copy {
  max-width: 820px;
}

.kicker,
.eyebrow {
  margin: 0 0 14px;
  color: #f4cf77;
  font-size: 15px;
  font-weight: 900;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: 68px;
  font-weight: 900;
}

.lead {
  max-width: 780px;
  margin: 0;
  color: #f1e8d5;
  font-size: 21px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.call-link,
.cta-strip a {
  border: 1px solid #e2bd66;
  color: #19140c;
  background: linear-gradient(135deg, #f1d27a, #c6922b);
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.22);
}

.ghost-link {
  color: #fffdfa;
  border: 1px solid rgba(255, 253, 250, 0.5);
  background: rgba(255, 253, 250, 0.08);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.trust-row span,
.pill,
.area-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.trust-row span {
  color: #fff7df;
  border: 1px solid rgba(255, 253, 250, 0.24);
  background: rgba(255, 253, 250, 0.1);
}

.section {
  padding: 58px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-title {
  margin: 0 0 28px;
  font-size: 34px;
  font-weight: 900;
  text-align: center;
}

.section-title::after {
  content: "";
  display: block;
  width: 78px;
  height: 4px;
  margin: 14px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), var(--emerald));
}

.section-title.left {
  text-align: left;
}

.section-title.left::after {
  margin-left: 0;
}

.section-lead {
  max-width: 830px;
  margin: -12px auto 28px;
  color: var(--muted);
  text-align: center;
}

.intro-section,
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.68fr) minmax(300px, 0.32fr);
  gap: 24px;
  align-items: start;
}

.intro-copy h2 {
  margin-bottom: 14px;
  font-size: 36px;
}

.intro-copy p {
  color: var(--muted);
  font-size: 17px;
}

.proof-panel,
.related-box,
.product-card,
.service-card,
.site-card,
.process-grid article,
.area-group {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 26px rgba(23, 21, 17, 0.045);
}

.proof-panel,
.related-box,
.site-card,
.area-group {
  padding: 22px;
}

.proof-panel {
  border-top: 5px solid var(--gold);
}

.proof-panel h3,
.related-box h2,
.site-card h3,
.area-group h3 {
  margin-bottom: 12px;
  font-size: 21px;
}

.proof-panel ul,
.related-box ul {
  margin: 0;
  padding-left: 20px;
}

.proof-panel li + li,
.related-box li + li {
  margin-top: 7px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-grid article {
  padding: 22px;
}

.process-grid span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--gold-deep);
  font-size: 26px;
  font-weight: 900;
}

.process-grid h3,
.service-card h3,
.product-info h4 {
  margin-bottom: 8px;
  font-size: 19px;
}

.process-grid p,
.service-card p,
.product-info p,
.site-card p,
.related-box p,
.area-group p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.product-section {
  margin-bottom: 40px;
}

.product-section:last-child {
  margin-bottom: 0;
}

.subsection-title {
  display: inline-flex;
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 5px solid var(--gold);
  font-size: 24px;
  font-weight: 900;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.product-card {
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--mist);
}

.product-info,
.service-card {
  padding: 18px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.service-card {
  border-top: 4px solid var(--emerald);
}

.cta-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin-top: 20px;
  padding: 22px;
  border: 1px solid rgba(201, 154, 55, 0.42);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(255, 248, 231, 0.96), rgba(237, 242, 238, 0.96)),
    var(--surface);
}

.cta-strip.wide {
  margin-top: 0;
}

.cta-strip strong {
  display: block;
  font-size: 20px;
}

.cta-strip span {
  display: block;
  color: var(--muted);
}

.area-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.area-tags,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.area-tag {
  color: #1d372f;
  border: 1px solid rgba(23, 107, 93, 0.24);
  background: #edf6f1;
}

.pill {
  color: var(--gold-deep);
  border: 1px solid rgba(201, 154, 55, 0.28);
  background: #fff8e7;
}

.faq {
  display: grid;
  gap: 10px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  padding: 16px 18px;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.related-box {
  border-top: 5px solid var(--ruby);
}

.related-box a,
.site-card a {
  color: var(--emerald);
  font-weight: 900;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.site-card {
  min-height: 230px;
}

.site-card h3 {
  margin-bottom: 10px;
}

.footer {
  padding: 34px 0;
  color: #ddd4c3;
  background: var(--charcoal);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
}

.footer p {
  margin: 6px 0 0;
  color: #bfb6a5;
}

.footer a {
  color: #f0d186;
  font-weight: 900;
}

.mobile-call-btn {
  display: none;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--mist);
}

@media (max-width: 980px) {
  .topbar-inner {
    grid-template-columns: 1fr auto;
  }

  .nav {
    grid-column: 1 / -1;
    order: 3;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .intro-section,
  .two-column,
  .area-grid {
    grid-template-columns: 1fr;
  }

  .process-grid,
  .product-grid,
  .service-grid,
  .site-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    min-height: 560px;
  }

  h1 {
    font-size: 52px;
  }
}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 24px, 1180px);
  }

  .topbar-inner {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px 0;
  }

  .header-call {
    width: 100%;
  }

  .hero {
    min-height: 530px;
    padding: 70px 0 58px;
    background-position: 62% center;
  }

  h1 {
    font-size: 38px;
  }

  .lead {
    font-size: 18px;
  }

  .section {
    padding: 42px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .intro-copy h2 {
    font-size: 29px;
  }

  .process-grid,
  .product-grid,
  .service-grid,
  .site-list,
  .cta-strip,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .cta-strip a,
  .call-link,
  .ghost-link {
    width: 100%;
  }

  .mobile-call-btn {
    display: inline-flex;
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 30;
    width: 58px;
    height: 58px;
    padding: 0;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    color: #19140c;
    background: linear-gradient(135deg, #f1d27a, #c6922b);
    box-shadow: 0 12px 24px rgba(49, 35, 18, 0.25);
    font-size: 13px;
    font-weight: 900;
    text-decoration: none;
  }
}