/* CGG Trading S.A. */

:root {
  --ink: #1d2723;
  --pine: #1e3a2f;
  --pine-deep: #142921;
  --moss: #4a6a58;
  --paper: #f6f4ef;
  --sand: #ece8de;
  --line: #ddd7c9;
  --ochre: #a87e2a;
  --white: #fff;
  --grey: #5d6660;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Inter", -apple-system, system-ui, sans-serif;
  --w: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--sans); font-size: 16px; line-height: 1.65; color: var(--ink); background: var(--white); }
html:lang(zh-CN) body { font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", var(--sans); line-height: 1.75; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--pine); text-decoration: none; }
ul, ol { list-style: none; }
.wrap { max-width: var(--w); margin: 0 auto; padding: 0 28px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.15; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.35rem; }
p { color: var(--grey); }

.label {
  display: block; font-size: .72rem; font-weight: 600; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ochre); margin-bottom: 14px;
}

.btn {
  display: inline-block; padding: 13px 30px; font-family: var(--sans);
  font-size: .85rem; font-weight: 600; letter-spacing: .04em; cursor: pointer;
  border: 1px solid var(--pine); transition: background .2s, color .2s;
}
.btn-solid { background: var(--pine); color: var(--white); }
.btn-solid:hover { background: var(--pine-deep); }
.btn-line { background: transparent; color: var(--pine); }
.btn-line:hover { background: var(--pine); color: var(--white); }
.btn-white { border-color: var(--white); color: var(--white); background: transparent; }
.btn-white:hover { background: var(--white); color: var(--pine); }

/* nav */
.nav { background: var(--white); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 100; }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 96px; }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo img { height: 68px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links > li { position: relative; }
.nav-links a { font-size: .9rem; font-weight: 500; color: var(--ink); padding: 8px 0; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ochre); }
.nav-cta { margin-left: 10px; }
.nav-links .nav-cta a.btn-solid {
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 154px;
  min-height: 46px;
  padding: 12px 24px;
  white-space: nowrap;
  text-align: center;
  line-height: 1.2;
}
.nav-links .nav-cta a.btn-solid:hover,
.nav-links .nav-cta a.btn-solid:focus {
  background: var(--pine-deep);
  color: var(--white);
}
.sub { position: absolute; top: 100%; left: -18px; min-width: 230px; background: var(--white);
  border: 1px solid var(--line); padding: 10px 0; display: none; }
.nav-links li:hover .sub, .nav-links li:focus-within .sub { display: block; }
.sub a { display: block; padding: 9px 20px; font-size: .85rem; }
.sub a:hover { background: var(--paper); }
.burger { display: none; background: none; border: 0; cursor: pointer; padding: 10px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }
.mnav { display: none; background: var(--white); border-bottom: 1px solid var(--line); padding: 10px 28px 22px; }
.mnav.open { display: block; }
.mnav a { display: block; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .95rem; font-weight: 500; }

/* hero */
.hero { position: relative; color: var(--white); }
.hero img.bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(13,26,20,.88) 22%, rgba(13,26,20,.45) 65%, rgba(13,26,20,.25)); }
.hero .wrap { position: relative; z-index: 1; padding-top: 110px; padding-bottom: 64px; }
.hero h1 { color: var(--white); max-width: 640px; margin-bottom: 22px; }
.hero p.lead { color: rgba(255,255,255,.82); max-width: 540px; font-size: 1.08rem; margin-bottom: 34px; }
.hero .label { color: #d9b35c; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 0; margin-top: 72px; border-top: 1px solid rgba(255,255,255,.25); }
.hero-stats div { flex: 1; padding: 22px 26px 0 0; }
.hero-stats strong { font-family: var(--serif); font-size: 1.9rem; font-weight: 500; color: #e7c87c; display: block; line-height: 1.1; }
.hero-stats span { font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.6); }

/* certification strip */
.certs { border-bottom: 1px solid var(--line); background: var(--white); }
.certs .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 28px; padding-top: 18px; padding-bottom: 18px; }
.certs span { font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--grey); }

/* sections */
.sec { padding: 96px 0; }
.sec-paper { background: var(--paper); }
.sec-pine { background: var(--pine-deep); color: var(--white); }
.sec-pine h2 { color: var(--white); }
.sec-head { max-width: 620px; margin-bottom: 56px; }
.sec-head h2 { margin-bottom: 16px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* split layout */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split figure { position: relative; }
.split figure img { width: 100%; object-fit: cover; }
.split h2 { margin-bottom: 20px; }
.split p + p { margin-top: 14px; }
.split .btn { margin-top: 30px; }
.fig-note { position: absolute; left: 0; bottom: 0; background: var(--pine-deep); color: var(--white);
  padding: 18px 26px; font-size: .8rem; letter-spacing: .06em; }
.fig-note strong { font-family: var(--serif); display: block; font-size: 1.5rem; font-weight: 500; color: #e7c87c; }

/* product grid */
.pgrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.pcard { background: var(--white); border: 1px solid var(--line); display: flex; flex-direction: column; transition: box-shadow .2s; }
.pcard:hover { box-shadow: 0 10px 30px rgba(20,40,30,.10); }
.pcard figure { aspect-ratio: 4/3; overflow: hidden; }
.pcard figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.pcard:hover figure img { transform: scale(1.04); }
.pcard-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.pcard-kicker { font-size: .68rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ochre); margin-bottom: 6px; }
.pcard h3 { font-size: 1.12rem; margin-bottom: 8px; }
.pcard p { font-size: .85rem; flex: 1; margin-bottom: 16px; }
.pcard a.more { font-size: .8rem; font-weight: 600; letter-spacing: .05em; color: var(--pine); }
.pcard a.more:hover { color: var(--ochre); }

/* numbers band */
.numbers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.numbers div { border-top: 1px solid rgba(255,255,255,.25); padding-top: 22px; }
.numbers strong { font-family: var(--serif); font-size: 2.6rem; font-weight: 500; color: #e7c87c; display: block; line-height: 1.1; margin-bottom: 6px; }
.numbers span { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,.6); }

/* markets / three-col editorial */
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.coln { border-top: 1px solid var(--line); padding-top: 24px; }
.coln em { font-family: var(--serif); font-style: normal; font-size: 1.05rem; color: var(--ochre); display: block; margin-bottom: 10px; }
.coln h3 { font-size: 1.15rem; margin-bottom: 10px; }
.coln p { font-size: .9rem; }
.coln ul { margin-top: 12px; }
.coln li { font-size: .85rem; color: var(--grey); padding: 5px 0; border-bottom: 1px dotted var(--line); }

/* insights cards */
.igrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.icard { border: 1px solid var(--line); background: var(--white); display: flex; flex-direction: column; }
.icard figure { aspect-ratio: 16/9; overflow: hidden; }
.icard figure img { width: 100%; height: 100%; object-fit: cover; }
.icard-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.icard time { font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--grey); margin-bottom: 8px; }
.icard h3 { font-size: 1.12rem; margin-bottom: 10px; }
.icard h3 a { color: var(--ink); }
.icard h3 a:hover { color: var(--ochre); }
.icard p { font-size: .85rem; flex: 1; }

/* CTA band */
.cta { background: var(--pine); color: var(--white); }
.cta .wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-top: 64px; padding-bottom: 64px; flex-wrap: wrap; }
.cta h2 { color: var(--white); max-width: 540px; }
.cta p { color: rgba(255,255,255,.75); margin-top: 10px; max-width: 480px; }
.cta-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* page header */
.phead { background: var(--paper); border-bottom: 1px solid var(--line); padding: 64px 0 52px; }
.phead h1 { max-width: 720px; margin-bottom: 14px; }
.phead p { max-width: 600px; font-size: 1.05rem; }
.crumbs { font-size: .78rem; color: var(--grey); margin-bottom: 26px; }
.crumbs a { color: var(--grey); }
.crumbs a:hover { color: var(--ochre); }
.crumbs span { margin: 0 8px; color: var(--line); }

/* product detail */
.pdetail { display: grid; grid-template-columns: 1.6fr 1fr; gap: 64px; align-items: start; }
.pdetail-photo { margin-bottom: 36px; }
.pdetail-photo img { width: 100%; max-height: 440px; object-fit: cover; }
.pdetail h2 { font-size: 1.6rem; margin: 36px 0 14px; }
.pdetail h2:first-of-type { margin-top: 0; }
.pdetail p + p { margin-top: 12px; }
.specbox { border: 1px solid var(--line); background: var(--paper); padding: 30px; position: sticky; top: 96px; }
.specbox h3 { margin-bottom: 18px; }
.specbox table { width: 100%; border-collapse: collapse; }
.specbox th { text-align: left; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--grey); font-weight: 600; padding: 9px 12px 9px 0; vertical-align: top; width: 42%; }
.specbox td { font-size: .85rem; padding: 9px 0; border-bottom: 1px solid var(--line); }
.specbox tr:last-child td { border-bottom: 0; }
.specbox .btn { width: 100%; text-align: center; margin-top: 20px; }
.uses { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.uses div { border-left: 2px solid var(--ochre); padding: 4px 0 4px 18px; }
.uses h3 { font-size: 1rem; margin-bottom: 4px; }
.uses p { font-size: .82rem; }
.datarow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 22px 0 8px; }
.datarow div { background: var(--paper); border: 1px solid var(--line); padding: 18px; text-align: center; }
.datarow strong { font-family: var(--serif); font-size: 1.5rem; font-weight: 500; color: var(--pine); display: block; }
.datarow span { font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--grey); }

/* article */
.article { max-width: 760px; margin: 0 auto; }
.article-meta { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--grey); margin-bottom: 18px; }
.article h2 { font-size: 1.55rem; margin: 40px 0 14px; }
.article h3 { font-size: 1.15rem; margin: 28px 0 10px; }
.article p { margin-bottom: 16px; }
.article ul, .article ol { margin: 0 0 18px 22px; }
.article ul { list-style: disc; }
.article ol { list-style: decimal; }
.article li { color: var(--grey); margin-bottom: 7px; font-size: .95rem; }
.article table { width: 100%; border-collapse: collapse; margin: 8px 0 24px; font-size: .88rem; }
.article th { text-align: left; background: var(--paper); padding: 10px 14px; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--grey); border: 1px solid var(--line); }
.article td { padding: 10px 14px; border: 1px solid var(--line); color: var(--grey); }
.article figure { margin: 28px 0; }
.article figure img { width: 100%; }
.article figcaption { font-size: .76rem; color: var(--grey); margin-top: 8px; }
.article .note { background: var(--paper); border-left: 3px solid var(--ochre); padding: 18px 22px; margin: 24px 0; font-size: .9rem; color: var(--grey); }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.cdetail { padding: 18px 0; border-bottom: 1px solid var(--line); }
.cdetail strong { display: block; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ochre); margin-bottom: 5px; }
.cdetail span, .cdetail a { font-size: .95rem; color: var(--ink); }
form.quote { border: 1px solid var(--line); padding: 38px; background: var(--white); }
form.quote { scroll-margin-top: 120px; }
form.quote h3 { margin-bottom: 24px; }
.frow { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.fgroup { margin-bottom: 18px; }
.fgroup label { display: block; font-size: .78rem; font-weight: 600; margin-bottom: 7px; }
.fgroup input, .fgroup select, .fgroup textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); background: var(--white);
  font-family: var(--sans); font-size: .9rem; color: var(--ink);
}
.fgroup input:focus, .fgroup select:focus, .fgroup textarea:focus { outline: 2px solid var(--pine); outline-offset: -1px; }
.fgroup textarea { min-height: 120px; resize: vertical; }
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary { font-weight: 600; font-size: .98rem; cursor: pointer; color: var(--ink); }
.faq details p { margin-top: 12px; font-size: .92rem; }

/* footer */
footer { background: var(--pine-deep); color: rgba(255,255,255,.7); font-size: .87rem; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 48px; padding: 64px 0 48px; }
.foot-grid h4 { font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.45); margin-bottom: 16px; font-weight: 600; }
.foot-grid a { color: rgba(255,255,255,.72); display: block; padding: 4px 0; }
.foot-grid a:hover { color: #fff; }
.foot-brand img { height: 68px; width: auto; background: #fff; padding: 7px 12px; margin-bottom: 16px; }
.foot-brand p { color: rgba(255,255,255,.55); font-size: .82rem; max-width: 280px; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 22px 0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: .78rem; color: rgba(255,255,255,.45); }
.foot-bottom a { color: rgba(255,255,255,.55); margin-left: 20px; }

/* responsive */
@media (max-width: 1020px) {
  .pgrid { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid, .pdetail { grid-template-columns: 1fr; gap: 44px; }
  .specbox { position: static; }
  .numbers { grid-template-columns: repeat(2, 1fr); }
  .cols3, .igrid { grid-template-columns: 1fr; gap: 32px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav-links, .nav-cta { display: none; }
  .burger { display: block; }
  .nav .wrap { min-height: 82px; }
  .nav-logo img, .foot-brand img { height: 56px; }
  .sec { padding: 64px 0; }
  .hero .wrap { padding-top: 80px; }
  .hero-stats { flex-direction: column; gap: 0; }
  .hero-stats div { padding: 14px 0 0; }
  .pgrid, .frow, .uses, .datarow { grid-template-columns: 1fr; }
  .numbers { grid-template-columns: 1fr; gap: 26px; }
  .cta .wrap { flex-direction: column; align-items: flex-start; }
  form.quote { padding: 26px 20px; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
}