/* ============================================================
   Peakstar — Inner page shared styles
   Used by: /services/, /products/, /industries/, /about/,
            /contact/, /case-studies/, /insights/
   ============================================================ */

/* ---------- Inner page hero ---------- */
.ipg-hero {
  position: relative;
  padding: 180px 0 96px;
  overflow: hidden;
  isolation: isolate;
  background: var(--bg-paper);
}
.ipg-hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 70% at 20% 10%, rgba(67,178,161,.14) 0%, rgba(67,178,161,0) 60%),
    radial-gradient(40% 50% at 90% 30%, rgba(34,87,122,.1) 0%, rgba(34,87,122,0) 60%);
  z-index: -1;
}
.ipg-hero .container {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: end;
}
.ipg-hero--center .container { grid-template-columns: 1fr; max-width: 880px; text-align: center; }
.ipg-crumbs {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  margin-bottom: 32px;
}
.ipg-crumbs a { color: var(--fg-3); }
.ipg-crumbs a:hover { color: var(--peak-jade); }
.ipg-crumbs .sep { opacity: 0.5; }
.ipg-hero__eyebrow {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--peak-jade);
  margin: 0 0 20px;
  display: inline-flex; align-items: center; gap: 10px;
}
.ipg-hero__eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--peak-jade);
}
.ipg-hero--center .ipg-hero__eyebrow { margin-left: auto; margin-right: auto; }
.ipg-hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(44px, 5.5vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--fg-1);
  margin: 0 0 24px;
}
.ipg-hero__title .zh {
  font-family: var(--font-zh); font-weight: 500; letter-spacing: -0.02em;
}
.ipg-hero__title .gr {
  background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ipg-hero__desc {
  font-family: var(--font-zh);
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg-2);
  max-width: 56ch;
  margin: 0;
}
.ipg-hero--center .ipg-hero__desc { margin: 0 auto; }
.ipg-hero__side {
  font-family: var(--font-zh);
  font-size: 15px;
  line-height: 1.75;
  color: var(--fg-2);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}
.ipg-hero__ctas { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.ipg-hero--center .ipg-hero__ctas { justify-content: center; }

/* Key metrics strip */
.ipg-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  padding: 40px 0;
  border-top: 1px solid var(--border-subtle);
  margin-top: 64px;
}
.ipg-metric__value {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--fg-1);
  line-height: 1;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ipg-metric__label {
  font-family: var(--font-zh);
  font-size: 14px;
  color: var(--fg-3);
  margin-top: 10px;
}

/* ---------- Section headers ---------- */
.ipg-section { padding: 96px 0; }
.ipg-section--mist { background: var(--bg-mist); }
.ipg-section--ink { background: var(--ink-900); color: var(--gray-0); }
.ipg-section--ink .ipg-shead__title { color: var(--gray-0); }
.ipg-section--ink .ipg-shead__desc { color: rgba(255,255,255,.72); }

.ipg-shead {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 64px;
}
.ipg-shead--center { grid-template-columns: 1fr; text-align: center; max-width: 820px; margin: 0 auto 64px; }
.ipg-shead__eyebrow {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--peak-jade);
  margin: 0 0 16px;
}
.ipg-section--ink .ipg-shead__eyebrow { color: var(--peak-mint); }
.ipg-shead__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 3.5vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--fg-1);
  margin: 0;
}
.ipg-shead__title .zh { font-family: var(--font-zh); font-weight: 500; }
.ipg-shead__desc {
  font-family: var(--font-zh);
  font-size: 16px;
  line-height: 1.75;
  color: var(--fg-2);
  margin: 0;
}

/* ---------- Info cards ---------- */
.ipg-card {
  background: var(--gray-0);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease-out-quart),
              box-shadow var(--dur-base) var(--ease-out-quart);
}
.ipg-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.ipg-card__eyebrow {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--peak-jade);
  margin: 0 0 12px;
}
.ipg-card__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg-1);
  margin: 0 0 10px;
  line-height: 1.25;
}
.ipg-card__desc {
  font-family: var(--font-zh);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fg-2);
  margin: 0;
}

/* ---------- Two-column prose ---------- */
.ipg-prose {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 80px;
  margin-bottom: 96px;
}
.ipg-prose__label {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.ipg-prose__body {
  font-family: var(--font-zh);
  font-size: 17px;
  line-height: 1.85;
  color: var(--fg-2);
}
.ipg-prose__body p { margin: 0 0 20px; }
.ipg-prose__body p:last-child { margin: 0; }
.ipg-prose__body h3 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 600;
  color: var(--fg-1);
  margin: 40px 0 12px;
  letter-spacing: -0.01em;
}
.ipg-prose__body ul { padding-left: 20px; margin: 0 0 20px; }
.ipg-prose__body ul li { margin-bottom: 10px; }
.ipg-prose__body strong { color: var(--fg-1); font-weight: 600; }

/* ---------- Pricing tiers ---------- */
.ipg-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ipg-tier {
  background: var(--gray-0);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  display: flex; flex-direction: column; gap: 24px;
}
.ipg-tier--featured {
  background: var(--ink-900);
  color: var(--gray-0);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-12px);
}
.ipg-tier--featured .ipg-tier__name,
.ipg-tier--featured .ipg-tier__price { color: var(--gray-0); }
.ipg-tier__recommend {
  position: absolute; top: -14px; left: 32px;
  padding: 6px 14px;
  font-family: var(--font-display); font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--peak-mint); color: var(--ink-900);
  border-radius: var(--radius-pill);
}
.ipg-tier__name {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-3);
  margin: 0;
}
.ipg-tier__price {
  font-family: var(--font-display);
  font-size: 42px; font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--fg-1);
  line-height: 1;
  margin: 0;
}
.ipg-tier__price small {
  font-family: var(--font-zh);
  font-size: 14px;
  font-weight: 400;
  color: var(--fg-3);
  margin-left: 6px;
}
.ipg-tier--featured .ipg-tier__price small { color: rgba(255,255,255,.6); }
.ipg-tier__desc {
  font-family: var(--font-zh);
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-2);
  margin: 0;
}
.ipg-tier--featured .ipg-tier__desc { color: rgba(255,255,255,.72); }
.ipg-tier__list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 10px;
  flex: 1;
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
}
.ipg-tier--featured .ipg-tier__list { border-top-color: rgba(255,255,255,.12); }
.ipg-tier__list li {
  font-family: var(--font-zh);
  font-size: 14px;
  color: var(--fg-2);
  padding-left: 24px; position: relative; line-height: 1.5;
}
.ipg-tier--featured .ipg-tier__list li { color: rgba(255,255,255,.84); }
.ipg-tier__list li::before {
  content: "";
  position: absolute; left: 0; top: 5px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background-color: rgba(67,178,161,.14);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2343B2A1' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='5 12 10 17 19 7'/></svg>");
  background-size: 9px 9px; background-position: center; background-repeat: no-repeat;
}
.ipg-tier--featured .ipg-tier__list li::before {
  background-color: rgba(128,237,165,.18);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2380EDA5' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='5 12 10 17 19 7'/></svg>");
}
.ipg-tier__cta {
  margin-top: auto;
  display: inline-flex; justify-content: center; align-items: center; gap: 8px;
  padding: 14px 24px;
  font-family: var(--font-display); font-weight: 500; font-size: 15px;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--dur-base) var(--ease-out-quart);
}
.ipg-tier__cta--outline { border: 1px solid var(--border-strong); color: var(--fg-1); }
.ipg-tier__cta--outline:hover { border-color: var(--peak-jade); color: var(--peak-jade); }
.ipg-tier__cta--solid { background: var(--peak-mint); color: var(--ink-900); }
.ipg-tier__cta--solid:hover { background: var(--gray-0); }

/* ---------- Feature grid ---------- */
.ipg-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ipg-feature {
  padding: 32px;
  background: var(--gray-0);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}
.ipg-feature__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: rgba(67,178,161,.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--peak-jade);
  margin-bottom: 20px;
}
.ipg-feature__icon svg { width: 22px; height: 22px; stroke-width: 1.6; }
.ipg-feature__title {
  font-family: var(--font-display);
  font-size: 18px; font-weight: 600; letter-spacing: -0.01em;
  color: var(--fg-1); margin: 0 0 10px; line-height: 1.3;
}
.ipg-feature__desc {
  font-family: var(--font-zh);
  font-size: 14px; line-height: 1.7; color: var(--fg-2); margin: 0;
}

/* ---------- FAQ ---------- */
.ipg-faq { max-width: 820px; margin: 0 auto; }
.ipg-faq__item {
  border-bottom: 1px solid var(--border-subtle);
  padding: 24px 0;
}
.ipg-faq__item summary {
  font-family: var(--font-zh);
  font-size: 18px;
  font-weight: 500;
  color: var(--fg-1);
  cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px;
}
.ipg-faq__item summary::-webkit-details-marker { display: none; }
.ipg-faq__item summary::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 24px; font-weight: 300;
  color: var(--peak-jade);
  transition: transform var(--dur-base) var(--ease-out-quart);
  line-height: 1;
}
.ipg-faq__item[open] summary::after { transform: rotate(45deg); }
.ipg-faq__answer {
  font-family: var(--font-zh);
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-2);
  margin: 16px 0 0;
  padding-right: 48px;
}

/* ---------- CTA block ---------- */
.ipg-cta-block {
  padding: 80px;
  border-radius: var(--radius-xl);
  background: var(--ink-900);
  color: var(--gray-0);
  position: relative; overflow: hidden; isolation: isolate;
}
.ipg-cta-block::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 70% at 100% 0%, rgba(67,178,161,.3) 0%, rgba(67,178,161,0) 60%),
    radial-gradient(50% 50% at 0% 100%, rgba(34,87,122,.4) 0%, rgba(34,87,122,0) 60%);
  z-index: -1;
}
.ipg-cta-block__eyebrow {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--peak-mint);
  margin: 0 0 16px;
}
.ipg-cta-block__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(32px, 4vw, 52px);
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--gray-0);
  margin: 0 0 24px;
  max-width: 20ch;
}
.ipg-cta-block__desc {
  font-family: var(--font-zh);
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,.72);
  margin: 0 0 40px;
  max-width: 48ch;
}
.ipg-cta-block__row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

/* ---------- Grid lists ---------- */
.ipg-list-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 48px;
  list-style: none; padding: 0; margin: 0;
}
.ipg-list-2col li {
  font-family: var(--font-zh);
  font-size: 15px;
  color: var(--fg-2);
  padding-left: 28px;
  position: relative;
  line-height: 1.6;
}
.ipg-list-2col li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 16px; height: 1px; background: var(--peak-jade);
}
.ipg-list-2col li strong { color: var(--fg-1); display: block; margin-bottom: 4px; font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .ipg-hero { padding: 140px 0 64px; }
  .ipg-hero .container,
  .ipg-shead { grid-template-columns: 1fr; gap: 32px; }
  .ipg-prose { grid-template-columns: 1fr; gap: 24px; margin-bottom: 64px; }
  .ipg-tiers { grid-template-columns: 1fr; }
  .ipg-tier--featured { transform: none; }
  .ipg-features { grid-template-columns: 1fr; }
  .ipg-section { padding: 64px 0; }
  .ipg-cta-block { padding: 48px 32px; }
  .ipg-list-2col { grid-template-columns: 1fr; }
}