/* ============================================================
   SOLUTION page
   ============================================================ */

.sol-hero {
  position: relative;
  padding: calc(var(--nav-h) + 100px) 0 100px;
  text-align: center;
  overflow: hidden;
}
.sol-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 55% 45% at 50% 0%, rgba(0, 208, 240, 0.12), transparent 70%);
}
.sol-hero__inner { position: relative; width: min(820px, 92%); margin: 0 auto; }
.sol-hero .kicker { justify-content: center; }
.sol-hero .kicker::after { content: ""; width: 28px; height: 1px; background: var(--cyan); }
.sol-hero__title {
  font-family: var(--font-display);
  font-size: clamp(38px, 5.6vw, 64px);
  font-weight: 700;
  line-height: 1.12;
  margin-bottom: 24px;
}
.sol-hero__title em { font-style: normal; color: var(--cyan); }
.sol-hero p.lead { margin: 0 auto; }

/* Flagship project */
.flagship {
  width: min(var(--max-w), 92%);
  margin: 0 auto 110px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  overflow: hidden;
  background: var(--bg-2);
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.5);
}
.flagship__visual { position: relative; min-height: 480px; }
.flagship__visual > img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 40%;
  /* source photo is low-res: soften tone so upscaling reads less */
  filter: saturate(0.85) brightness(0.9);
}
.flagship__visual::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 55%, rgba(19, 27, 46, 0.85));
}
.flagship__insets {
  position: absolute;
  left: 24px; right: 24px; bottom: 24px;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  gap: 12px;
}
.flagship__inset {
  width: 34%;
  max-width: 200px;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-1);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}
.flagship__inset--wide { width: 52%; max-width: 300px; }
.flagship__inset img { display: block; width: 100%; height: auto; }
.flagship__inset figcaption {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.flagship__label {
  position: absolute;
  top: 24px; left: 24px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--bg-0);
  background: var(--cyan);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
}

.flagship__body {
  padding: 52px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.flagship__body .kicker { margin-bottom: 16px; }
.flagship__title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 10px;
}
.flagship__subtitle {
  color: var(--cyan);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 22px;
}
.flagship__desc {
  color: var(--ink-dim);
  font-size: 15px;
  margin-bottom: 34px;
}

.impact { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.impact__cell {
  padding: 20px 22px;
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
}
.impact__cell:nth-child(-n+2) { border-top: none; }
.impact__cell:nth-child(odd) { border-left: none; }
.impact__cell .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.impact__cell .value {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
}

/* Live dashboard mock */
.livecard {
  width: min(1000px, 92%);
  margin: 0 auto 110px;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background: linear-gradient(160deg, var(--bg-2), var(--bg-0));
  overflow: hidden;
}
.livecard__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.livecard__dots { display: flex; gap: 7px; }
.livecard__dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--bg-3); border: 1px solid var(--line-strong); }
.livecard__dots span:first-child { background: rgba(0, 208, 240, 0.7); border-color: var(--cyan); }
.livecard__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.livecard__live {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-transform: uppercase;
}
.livecard__live::before {
  content: "";
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse-dot 1.6s infinite;
}

.livecard__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.livecard__cell {
  padding: 26px 26px 24px;
  border-left: 1px solid var(--line);
}
.livecard__cell:first-child { border-left: none; }
.livecard__cell .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.livecard__cell .value {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 700;
}
.livecard__cell .value em { font-style: normal; color: var(--cyan); }
.livecard__cell canvas { width: 100%; height: 44px; display: block; margin-top: 14px; }

/* Industrial boiler IoT section */
.boiler {
  width: min(var(--max-w), 92%);
  margin: 0 auto;
  padding-bottom: 110px;
}
.boiler__status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  border: 1px solid rgba(0, 208, 240, 0.35);
  border-radius: 999px;
  background: var(--cyan-soft);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
}
.boiler__status::before {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: pulse-dot 1.6s infinite;
}

.boiler__features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.bfeat {
  padding: 30px 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-2);
  transition: border-color 0.3s, transform 0.3s;
}
.bfeat:hover { border-color: rgba(0, 208, 240, 0.4); transform: translateY(-4px); }
.bfeat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 18px;
}
.bfeat h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.bfeat p { color: var(--ink-dim); font-size: 14px; }

/* System flow: field -> edge -> cloud -> monitor */
.bflow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-bottom: 40px;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.bflow li {
  position: relative;
  padding: 24px 26px;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.bflow li:first-child { border-left: none; }
.bflow li:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%; right: -11px;
  transform: translateY(-50%);
  z-index: 1;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg-1);
  border: 1px solid rgba(0, 208, 240, 0.4);
  color: var(--cyan);
  font-size: 11px;
  display: grid; place-items: center;
}
.bflow__step {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.bflow strong { font-size: 16px; font-weight: 700; }
.bflow small { color: var(--ink-dim); font-size: 13px; }

.boiler .livecard { width: 100%; margin: 0; }
.boiler__note { margin-top: 14px; color: var(--ink-faint); font-size: 12px; }

/* Edge computing section */
.edge {
  width: min(var(--max-w), 92%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
  padding-bottom: 110px;
}
.edge__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.22;
  margin-bottom: 20px;
}
.edge__desc { color: var(--ink-dim); margin-bottom: 34px; max-width: 520px; }
.edge__stack { display: flex; flex-wrap: wrap; gap: 12px; }

.edge__panel {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 36px;
  background:
    radial-gradient(ellipse 60% 60% at 80% 20%, rgba(0, 208, 240, 0.08), transparent 70%),
    var(--bg-2);
  overflow: hidden;
}
.edge__panel .ring {
  position: absolute;
  border: 1px solid rgba(0, 208, 240, 0.22);
  border-radius: 50%;
}
.edge__panel .ring1 { width: 260px; height: 260px; top: -70px; right: -70px; }
.edge__panel .ring2 { width: 170px; height: 170px; top: -25px; right: -25px; border-color: rgba(0, 208, 240, 0.35); }
.edge__panel .ring3 { width: 90px; height: 90px; top: 15px; right: 15px; background: rgba(0, 208, 240, 0.1); border-color: var(--cyan); }
.edge__panel .core {
  position: absolute;
  top: 15px; right: 15px;
  width: 90px; height: 90px;
  display: grid; place-items: center;
}
.edge__panel .core span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}
.edge__list { display: grid; gap: 22px; margin-top: 10px; }
.edge__list .item { display: flex; gap: 16px; align-items: flex-start; }
.edge__list .item .dot {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border: 1px solid rgba(0, 208, 240, 0.4);
  border-radius: 10px;
  display: grid; place-items: center;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
}
.edge__list h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.edge__list p { color: var(--ink-dim); font-size: 14px; }

@media (max-width: 960px) {
  .flagship { grid-template-columns: 1fr; }
  .flagship__visual { min-height: 320px; }
  .flagship__visual::after { background: linear-gradient(0deg, rgba(19,27,46,0.92), transparent 55%); }
  .livecard__grid { grid-template-columns: 1fr 1fr; }
  .livecard__cell:nth-child(3) { border-left: none; }
  .livecard__cell:nth-child(n+3) { border-top: 1px solid var(--line); }
  .edge { grid-template-columns: 1fr; gap: 40px; }
  .boiler__features { grid-template-columns: 1fr 1fr; }
  .bflow { grid-template-columns: 1fr 1fr; }
  .bflow li:nth-child(3) { border-left: none; }
  .bflow li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .bflow li:nth-child(2)::after { display: none; }
}
@media (max-width: 560px) {
  .livecard__grid { grid-template-columns: 1fr; }
  .livecard__cell { border-left: none; border-top: 1px solid var(--line); }
  .livecard__cell:first-child { border-top: none; }
  .flagship__body { padding: 36px 28px; }
  .flagship__insets { left: 14px; right: 14px; bottom: 14px; gap: 8px; }
  .flagship__inset figcaption { padding: 6px 8px; font-size: 9px; letter-spacing: 0.06em; white-space: nowrap; }
  .boiler__features { grid-template-columns: 1fr; }
  .bflow { grid-template-columns: 1fr; }
  .bflow li { border-left: none; border-top: 1px solid var(--line); }
  .bflow li:first-child { border-top: none; }
  .bflow li:not(:last-child)::after { display: none; }
}