:root {
  --paper: #f5f1ea;        /* warm ivory background */
  --paper-2: #efe9df;
  --card: #faf7f2;
  --ink: #1a1915;          /* near-black text */
  --ink-soft: #4a463d;
  --muted: #7c766a;
  --clay: #cc785c;         /* Anthropic-inspired clay/coral accent */
  --clay-dark: #b5624a;
  --line: #e2dbcf;
  --slate: #2b2a25;
  --maxw: 1120px;
  --focus: #2f6fd6;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Georgia", "Songti SC", "STSong", "PingFang SC", "Microsoft YaHei", serif;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}
.sans {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Helvetica, Arial, sans-serif;
}

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- accessibility: skip link + focus ---------- */
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--slate); color: var(--paper); padding: 10px 18px; border-radius: 8px;
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.9rem; text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- nav ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 241, 234, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
nav {
  display: flex; align-items: center; justify-content: space-between; height: 66px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
  position: relative;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.2px; }
.brand .mk {
  width: 26px; height: 26px; border-radius: 7px; background: var(--clay);
  position: relative;
}
.brand .mk::after { content:""; position:absolute; inset:6px 6px auto 6px; height:3px; background: var(--paper); border-radius:2px; box-shadow:0 6px 0 var(--paper); }

.navlinks { display: flex; gap: 28px; align-items: center; font-size: 0.92rem; }
.navlinks a { color: var(--ink-soft); text-decoration: none; transition: color 0.2s; }
.navlinks a:hover { color: var(--clay); }
.navlinks a[aria-current="page"] { color: var(--clay); font-weight: 600; }

/* ---------- nav dropdowns (Solutions / Products) ---------- */
.nav-item { position: relative; }
.nav-item summary {
  color: var(--ink-soft); cursor: pointer; list-style: none; display: inline-flex;
  align-items: center; gap: 6px; user-select: none;
}
.nav-item summary::-webkit-details-marker { display: none; }
.nav-item summary:hover { color: var(--clay); }
.nav-item .chev {
  width: 7px; height: 7px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px); transition: transform 0.2s;
}
.nav-item[open] .chev { transform: rotate(-135deg) translateY(1px); }
.nav-item .dropdown-panel {
  position: absolute; top: calc(100% + 14px); left: -14px; min-width: 240px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 18px 40px rgba(43,42,37,0.12); padding: 10px; z-index: 60;
  max-height: calc(100vh - 96px); overflow-y: auto;
}
.nav-item .dropdown-panel a {
  display: block; padding: 9px 12px; border-radius: 8px; font-size: 0.9rem; color: var(--ink-soft);
}
.nav-item .dropdown-panel a:hover { background: var(--paper-2); color: var(--clay); }
.nav-item .dropdown-panel .dropdown-viewall {
  margin-top: 6px; padding-top: 12px; border-top: 1px solid var(--line);
  font-weight: 600; color: var(--clay); font-size: 0.85rem;
}

.lang-toggle {
  color: var(--muted); font-size: 0.85rem; cursor: pointer; background: none; border: none;
  font-family: inherit; padding: 4px 6px;
}
.lang-toggle b { color: var(--ink); }

.pill {
  padding: 9px 18px; border-radius: 8px; background: var(--slate); color: var(--paper) !important;
  font-weight: 500; transition: background 0.2s;
}
.pill:hover { background: var(--clay) !important; }

/* mobile hamburger */
.menu-btn {
  display: none; background: none; border: 1px solid var(--line); border-radius: 8px;
  width: 40px; height: 40px; cursor: pointer; align-items: center; justify-content: center;
  flex-direction: column; gap: 4px;
}
.menu-btn span { display: block; width: 20px; height: 2px; background: var(--ink); transition: transform 0.2s, opacity 0.2s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- breadcrumb (detail pages) ---------- */
.breadcrumb {
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.85rem; color: var(--muted);
  padding: 20px 0 0;
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--clay); }
.breadcrumb .sep { margin: 0 8px; opacity: 0.5; }
.breadcrumb .current { color: var(--ink); }

/* ---------- hero ---------- */
.hero { padding: 96px 0 56px; }
.hero.detail-hero { padding: 28px 0 48px; }
.hero .tag-pill {
  display: inline-block; font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 0.78rem; font-weight: 600; color: var(--clay); text-transform: uppercase;
  letter-spacing: 1px; background: rgba(204,120,92,0.1); padding: 6px 14px; border-radius: 999px;
  margin-bottom: 18px;
}
.hero.detail-hero h1 { max-width: 20ch; }
.hero:not(.detail-hero) h1 { max-width: 18ch; }
.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 5rem); line-height: 1.12; font-weight: 500;
  letter-spacing: -1px; max-width: 14ch;
}
.hero h1 a { color: var(--clay); text-decoration: none; border-bottom: 2px solid rgba(204,120,92,0.35); }
.hero h1 a:hover { border-color: var(--clay); }
.hero .lead {
  margin-top: 30px; max-width: 560px; font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-soft); font-family: -apple-system, "PingFang SC", sans-serif; line-height: 1.6;
}
.hero .actions { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }
.detail-actions { align-items: center; }
.detail-actions .status-note {
  max-width: 520px; color: var(--muted); font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 0.88rem; line-height: 1.55;
}

.btn {
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.98rem; font-weight: 500;
  padding: 13px 26px; border-radius: 9px; text-decoration: none; cursor: pointer;
  transition: transform 0.15s, background 0.2s, border-color 0.2s; border: 1px solid transparent;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-solid { background: var(--slate); color: var(--paper); }
.btn-solid:hover { background: var(--clay); }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-outline:hover { border-color: var(--clay); color: var(--clay); }

/* ---------- proof points strip ---------- */
.proof {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px;
  margin-top: 54px; padding-top: 34px; border-top: 1px solid var(--line);
}
.proof-item { font-family: -apple-system, "PingFang SC", sans-serif; }
.proof-item .big { font-size: 1.12rem; font-weight: 700; color: var(--ink); }
.proof-item .small { font-size: 0.85rem; color: var(--muted); margin-top: 4px; }

/* ---------- feature strip (big clay panel) ---------- */
.feature {
  margin: 20px auto 0; border-radius: 16px; overflow: hidden;
  background: var(--clay); color: #fff8f4;
  display: grid; grid-template-columns: 1.1fr 0.9fr; min-height: 360px;
}
.feature .txt { padding: 54px; display: flex; flex-direction: column; justify-content: center; }
.feature .kick { font-family:-apple-system,"PingFang SC",sans-serif; font-size:0.8rem; letter-spacing:2px; text-transform:uppercase; opacity:0.85; }
.feature h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 500; line-height: 1.2; margin: 16px 0 18px; letter-spacing:-0.5px; }
.feature p { font-family:-apple-system,"PingFang SC",sans-serif; opacity:0.9; max-width: 440px; }
.feature .link { font-family:-apple-system,"PingFang SC",sans-serif; margin-top:26px; color:#fff; text-decoration:none; font-weight:500; border-bottom:1px solid rgba(255,255,255,0.5); width:fit-content; padding-bottom:2px; }
.feature .art {
  position: relative; background:
    radial-gradient(120% 100% at 100% 0%, rgba(255,255,255,0.22), transparent 55%),
    linear-gradient(160deg, var(--clay-dark), var(--clay));
}
.feature .art::before {
  content:""; position:absolute; inset:0;
  background-image: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.4) 1.5px, transparent 2px);
  background-size: 26px 26px; opacity: 0.25;
  mask-image: radial-gradient(ellipse 70% 70% at 70% 40%, #000, transparent 75%);
}
.feature .art .ring {
  position:absolute; border:1.5px solid rgba(255,255,255,0.35); border-radius:50%;
}
.feature .art .ring.r1 { inset: 22% 26% 22% 26%; }
.feature .art .ring.r2 { inset: 34% 38% 34% 38%; }
.feature .art .ring.r3 { inset: 44% 46% 44% 46%; background: rgba(255,255,255,0.15); }
.engine-facts {
  position: relative; z-index: 1; height: 100%; padding: 48px 44px;
  display: flex; flex-direction: column; justify-content: center; gap: 14px;
  list-style: none; font-family: -apple-system, "PingFang SC", sans-serif;
}
.engine-facts li {
  padding: 14px 16px 14px 42px; border: 1px solid rgba(255,255,255,0.28);
  border-radius: 10px; background: rgba(43,42,37,0.12); line-height: 1.45;
  position: relative;
}
.engine-facts li::before { content: "✓"; position: absolute; left: 16px; font-weight: 700; }

/* ---------- section ---------- */
section.block { padding: 78px 0; scroll-margin-top: 84px; }
.row, .rcard { scroll-margin-top: 96px; }
.row.nav-highlight, .rcard.nav-highlight { box-shadow: 0 0 0 2px var(--clay); border-radius: 10px; transition: box-shadow 1.6s ease-out; }
.eyebrow { font-family:-apple-system,"PingFang SC",sans-serif; font-size:0.8rem; letter-spacing:2px; text-transform:uppercase; color: var(--clay); font-weight:600; }
.h-sec { font-size: clamp(1.7rem, 4vw, 2.6rem); font-weight: 500; letter-spacing:-0.5px; line-height: 1.2; margin-top: 14px; }
.sec-sub { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--muted); margin-top:14px; max-width: 540px; line-height: 1.6; }

/* ---------- cards (news / products) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr)); gap: 20px; margin-top: 42px; }
.rcard {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 30px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  display:flex; flex-direction:column; min-height: 200px;
}
.rcard:hover, .rcard:focus-within { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(43,42,37,0.08); border-color: var(--clay); }
.rcard { text-decoration: none; color: inherit; }
.rcard .meta { font-family:-apple-system,"PingFang SC",sans-serif; font-size:0.78rem; color: var(--muted); text-transform:uppercase; letter-spacing:1px; }
.rcard .go {
  display: inline-block; margin-top: auto; padding-top: 4px; font-family:-apple-system,"PingFang SC",sans-serif;
  color: var(--clay); font-weight: 600; font-size: 0.9rem;
}
.rcard h3 { font-size: 1.35rem; font-weight: 500; letter-spacing: -0.2px; margin: 14px 0 12px; line-height:1.3; }
.rcard p { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--ink-soft); font-size:0.94rem; flex:1; }

.product-group { margin-top: 52px; }
.product-group + .product-group { padding-top: 48px; border-top: 1px solid var(--line); }
.product-group-head {
  display: grid; grid-template-columns: minmax(150px, 0.45fr) minmax(0, 1.55fr);
  gap: 24px; align-items: baseline; font-family: -apple-system, "PingFang SC", sans-serif;
}
.product-group-head span {
  color: var(--clay); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 1.4px; text-transform: uppercase;
}
.product-group-head h3 { font-size: 1.2rem; font-weight: 500; color: var(--ink-soft); }
.product-group .cards { margin-top: 24px; }
.product-group-rnd .rcard { background: var(--paper-2); border-style: dashed; }
.product-group-rnd .rcard .meta { color: var(--clay-dark); font-weight: 700; }

/* ---------- running UI / prototype previews ---------- */
.preview-section {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.preview-section .sec-sub { max-width: 760px; }
.preview-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px; margin-top: 42px;
}
.preview-card {
  display: flex; flex-direction: column; min-width: 0; overflow: hidden;
  color: inherit; text-decoration: none; background: var(--card);
  border: 1px solid var(--line); border-radius: 16px;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.preview-card:hover, .preview-card:focus-visible {
  transform: translateY(-4px); border-color: var(--clay);
  box-shadow: 0 16px 36px rgba(43,42,37,0.08);
}
.preview-media, .product-shot-media {
  aspect-ratio: 16 / 10; overflow: hidden; background: var(--slate);
}
.preview-media { border-bottom: 1px solid var(--line); }
.preview-media img, .product-shot-media img {
  width: 100%; height: 100%; object-fit: cover;
}
.preview-copy {
  display: flex; flex: 1; flex-direction: column; align-items: flex-start;
  padding: 24px 26px 26px;
}
.preview-label {
  font-family: -apple-system, "PingFang SC", sans-serif;
  color: var(--clay-dark); font-size: 0.76rem; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
}
.preview-copy h3 {
  margin-top: 10px; font-size: 1.3rem; font-weight: 500;
  letter-spacing: -0.2px; line-height: 1.3;
}
.preview-copy p {
  margin-top: 10px; color: var(--ink-soft);
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.92rem;
}
.preview-link {
  margin-top: auto; padding-top: 18px; color: var(--clay);
  font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 0.88rem; font-weight: 700;
}
.product-preview { padding: 0 0 68px; }
.product-shot {
  overflow: hidden; background: var(--card);
  border: 1px solid var(--line); border-radius: 16px;
}
.product-shot-media { border-bottom: 1px solid var(--line); }
.product-shot figcaption {
  display: grid; grid-template-columns: minmax(180px, 0.45fr) minmax(0, 1.55fr);
  gap: 24px; align-items: start; padding: 22px 26px 24px;
  font-family: -apple-system, "PingFang SC", sans-serif;
}
.product-shot figcaption p { color: var(--ink-soft); font-size: 0.92rem; }

.evidence-link {
  display: inline-block; margin-top: 12px; color: var(--clay); text-decoration: none;
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.88rem; font-weight: 700;
}
.evidence-link:hover { color: var(--clay-dark); }
.evidence-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* details-based "read more" disclosure, styled to blend with card typography */
.rcard details, .row details { margin-top: 12px; }
.rcard summary, .row summary {
  font-family:-apple-system,"PingFang SC",sans-serif; color: var(--clay); font-weight:600; font-size:0.9rem;
  cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: 6px;
}
.rcard summary::-webkit-details-marker, .row summary::-webkit-details-marker { display: none; }
.rcard summary::after, .row summary::after { content: "→"; transition: transform 0.2s; }
.rcard details[open] summary::after, .row details[open] summary::after { transform: rotate(90deg); }
.rcard details p, .row details p {
  font-family:-apple-system,"PingFang SC",sans-serif; color: var(--ink-soft); font-size: 0.9rem;
  margin-top: 10px; line-height: 1.6;
}

/* ---------- industries list (editorial rows) ---------- */
.rows { margin-top: 44px; border-top: 1px solid var(--line); }
.row {
  display: grid; grid-template-columns: 0.5fr 1.4fr; gap: 24px;
  padding: 30px 8px; border-bottom: 1px solid var(--line);
  transition: background 0.2s, padding 0.2s;
}
.row { text-decoration: none; color: inherit; }
.row:hover, .row:focus-within { background: var(--paper-2); padding-left: 20px; }
.row .n { font-size: 1.5rem; font-weight: 500; color: var(--clay); }
.row .body h3 { font-size: 1.4rem; font-weight: 500; letter-spacing: -0.2px; line-height: 1.3; margin-bottom: 8px; }
.row .body p { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--muted); font-size:0.94rem; }
.row .body .cta {
  display: inline-block; margin-top: 12px; font-family:-apple-system,"PingFang SC",sans-serif;
  color: var(--clay); font-weight: 600; font-size: 0.88rem;
}

/* ---------- pain-point grid + approach steps (detail pages) ---------- */
.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 20px; margin-top: 40px; }
.pain-card { padding: 26px; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }
.pain-card h3 { font-size: 1.1rem; font-weight: 500; line-height: 1.35; margin-bottom: 10px; }
.pain-card p { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--muted); font-size: 0.92rem; }

.step-list { margin-top: 40px; counter-reset: step; }
.step-item {
  display: grid; grid-template-columns: 56px 1fr; gap: 20px; padding: 26px 0;
  border-bottom: 1px solid var(--line); align-items: start;
}
.step-item:first-child { border-top: 1px solid var(--line); }
.step-num {
  counter-increment: step; width: 40px; height: 40px; border-radius: 50%;
  background: var(--clay); color: #fff; display: flex; align-items: center; justify-content: center;
  font-family: -apple-system, "PingFang SC", sans-serif; font-weight: 700; font-size: 1rem;
}
.step-num::before { content: counter(step); }
.step-item h3 { font-size: 1.15rem; font-weight: 500; line-height: 1.35; margin-bottom: 8px; }
.step-item p { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--muted); font-size: 0.94rem; }
.solution-track {
  display: grid; grid-template-columns: 56px 1fr; column-gap: 20px; align-items: baseline;
  padding: 34px 0 12px; border-bottom: 1px solid var(--line);
}
.track-num {
  grid-row: span 2; color: var(--clay); font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 0.82rem; font-weight: 700; letter-spacing: 1px;
}
.solution-track h3 { font-size: 1.25rem; font-weight: 500; letter-spacing: -0.2px; line-height: 1.3; }
.solution-track p {
  grid-column: 2; margin-top: 7px; font-family: -apple-system, "PingFang SC", sans-serif;
  color: var(--muted); font-size: 0.94rem; max-width: 58ch;
}

/* ---------- related links (detail pages cross-linking) ---------- */
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 16px; margin-top: 32px; }
.related-card {
  display: block; background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px; text-decoration: none; color: inherit; transition: transform 0.2s, border-color 0.2s;
}
.related-card:hover { transform: translateY(-3px); border-color: var(--clay); }
.related-card .related-tag {
  font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 1px; color: var(--muted);
}
.related-card h4 { font-size: 1.1rem; font-weight: 500; line-height: 1.35; margin-top: 8px; }
.related-card p { font-family: -apple-system, "PingFang SC", sans-serif; color: var(--ink-soft); font-size: 0.88rem; line-height: 1.55; margin-top: 8px; }
.related-card .go { font-family: -apple-system, "PingFang SC", sans-serif; color: var(--clay); font-size: 0.85rem; font-weight: 600; margin-top: 10px; display: block; }

/* ---------- capabilities minimal grid ---------- */
.cap-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap:2px; margin-top:44px; background: var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden; }
.cap { background: var(--card); padding: 32px; }
.cap .num { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--clay); font-size:0.85rem; font-weight:600; }
.cap h3 { font-size:1.2rem; font-weight:500; line-height:1.3; margin:14px 0 8px; }
.cap p { font-family:-apple-system,"PingFang SC",sans-serif; color: var(--muted); font-size:0.9rem; }

/* ---------- delivery flow ---------- */
.operating-model { background: var(--paper-2); }
.flow-grid {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0; margin-top: 44px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
}
.flow-step { padding: 28px; background: var(--card); position: relative; }
.flow-step + .flow-step { border-left: 1px solid var(--line); }
.flow-step + .flow-step::before {
  content: "→"; position: absolute; left: -10px; top: 30px; width: 20px; height: 20px;
  border-radius: 50%; background: var(--paper-2); color: var(--clay); display: grid; place-items: center;
  font-family: -apple-system, sans-serif; font-weight: 700;
}
.flow-step > span {
  color: var(--clay); font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 1px;
}
.flow-step h3 { margin-top: 18px; font-size: 1.12rem; font-weight: 500; line-height: 1.35; }
.flow-step p { margin-top: 9px; color: var(--muted); font-family: -apple-system, "PingFang SC", sans-serif; font-size: 0.9rem; }

/* ---------- statement + contact form ---------- */
.statement { background: var(--slate); color: var(--paper); border-radius:16px; padding: 64px 54px; margin: 40px auto; }
.statement h2 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight:500; letter-spacing:-0.5px; max-width: 20ch; line-height:1.15; }
.statement .sub { font-family:-apple-system,"PingFang SC",sans-serif; color: rgba(245,241,234,0.75); margin-top: 14px; max-width: 46ch; }
.btn-light { background: var(--paper); color: var(--ink); }
.btn-light:hover { background: var(--clay); color: #fff; }
.btn-lineonly { background: transparent; border-color: rgba(245,241,234,0.4); color: var(--paper); }
.btn-lineonly:hover { border-color: var(--paper); }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 36px; align-items: start; }
.contact-direct { font-family:-apple-system,"PingFang SC",sans-serif; }
.contact-direct .item { margin-bottom: 18px; }
.contact-direct .label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(245,241,234,0.6); }
.contact-direct .value { font-size: 1.05rem; margin-top: 4px; }
.contact-direct .value a { color: var(--paper); text-decoration: underline; text-underline-offset: 3px; }

.contact-form { font-family:-apple-system,"PingFang SC",sans-serif; display: flex; flex-direction: column; gap: 14px; }
.contact-form label { font-size: 0.85rem; color: rgba(245,241,234,0.85); display: block; margin-bottom: 6px; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 14px; border-radius: 8px; border: 1px solid rgba(245,241,234,0.25);
  background: rgba(245,241,234,0.06); color: var(--paper); font-family: inherit; font-size: 0.95rem;
}
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(245,241,234,0.4); }
.contact-form textarea { min-height: 96px; resize: vertical; }
.contact-form .form-note { font-size: 0.78rem; color: rgba(245,241,234,0.55); margin-top: 2px; }
.contact-form button {
  align-self: flex-start; margin-top: 4px;
}
.contact-form .form-status { font-size: 0.85rem; margin-top: 4px; min-height: 1.2em; }
.contact-form .form-status.ok { color: #b6e3c6; }
.contact-form .form-status.err { color: #f0b3a3; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 56px 0 34px; font-family:-apple-system,"PingFang SC",sans-serif; }
.fgrid { display:flex; justify-content:space-between; flex-wrap:wrap; gap:34px; }
.fcol h4 { font-size:0.82rem; text-transform:uppercase; letter-spacing:1px; color:var(--muted); margin-bottom:14px; }
.fcol a, .fcol summary { display:block; color: var(--ink-soft); text-decoration:none; font-size:0.9rem; margin-bottom:10px; cursor: pointer; }
.fcol a:hover, .fcol summary:hover { color: var(--clay); }
.fcol summary::-webkit-details-marker { display: none; }
.fcol details p { font-size: 0.84rem; color: var(--muted); margin: -4px 0 12px; max-width: 32ch; line-height: 1.6; }
.fbottom { margin-top:44px; padding-top:22px; border-top:1px solid var(--line); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; color:var(--muted); font-size:0.82rem; }

/* ---------- reveal-on-scroll (progressive enhancement) ---------- */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s, transform .7s; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- mobile ---------- */
@media (max-width: 820px) {
  .menu-btn { display: inline-flex; }
  .navlinks {
    position: absolute; top: 66px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; gap: 0; padding: 8px 28px 20px;
    display: none;
  }
  .navlinks.open { display: flex; }
  .navlinks a, .navlinks .lang-toggle { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .navlinks .pill { width: 100%; justify-content: center; margin-top: 10px; border-bottom: none; }

  .feature { grid-template-columns: 1fr; }
  .feature .art { min-height: 200px; }
  .engine-facts { padding: 28px; }
  .row { grid-template-columns: auto 1fr; }
  .product-group-head { grid-template-columns: 1fr; gap: 8px; }
  .preview-grid { grid-template-columns: 1fr; }
  .product-shot figcaption { grid-template-columns: 1fr; gap: 8px; }
  .flow-grid { grid-template-columns: 1fr; }
  .evidence-cards { grid-template-columns: 1fr; }
  .flow-step + .flow-step { border-left: none; border-top: 1px solid var(--line); }
  .flow-step + .flow-step::before { content: "↓"; left: 28px; top: -10px; }
  .solution-track { grid-template-columns: 40px 1fr; column-gap: 16px; }
  .contact-grid { grid-template-columns: 1fr; }

  .nav-item .dropdown-panel {
    position: static; box-shadow: none; border: none; background: none; padding: 4px 0 4px 12px;
    margin-top: 4px;
  }
  .nav-item .dropdown-panel a { padding: 8px 0; border-radius: 0; }
}