:root {
  --ink: #0c2438;
  --ink-soft: #1a3a52;
  --mist: #e4eef3;
  --fog: #f3f8fa;
  --cloud: #ffffff;
  --mute: #5a6f7d;
  --line: rgba(12, 36, 56, 0.12);
  --signal: #00a896;
  --signal-deep: #007f72;
  --flare: #ff8c42;
  --font-display: "Trebuchet MS", "DIN Alternate", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --wrap: 1120px;
  --ease: cubic-bezier(0.2, 0.85, 0.25, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 90% 50% at 10% -10%, rgba(0, 168, 150, 0.12), transparent 55%),
    radial-gradient(ellipse 70% 40% at 100% 0%, rgba(255, 140, 66, 0.1), transparent 50%),
    linear-gradient(180deg, var(--mist) 0%, var(--fog) 40%, #dce8ee 100%);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.shell { width: min(100% - 2rem, var(--wrap)); margin-inline: auto; }

/* —— top bar —— */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(243, 248, 250, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .topbar { background: var(--fog); }
}
.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.1rem;
}
.mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(0.92rem, 2vw, 1.12rem);
  letter-spacing: 0.01em;
  line-height: 1.25;
  color: var(--ink);
}
.mark em {
  display: block;
  font-style: normal;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--signal);
  margin-top: 0.12rem;
}
.menu-btn {
  display: none;
  border: 1.5px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  padding: 0.42rem 0.8rem;
  cursor: pointer;
}
.nav-links { display: flex; flex-wrap: wrap; gap: 0.1rem; }
.nav-links a {
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--mute);
  padding: 0.45rem 0.75rem;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.nav-links a:hover,
.nav-links a.is-on {
  color: var(--cloud);
  background: var(--ink);
}

@media (max-width: 860px) {
  .menu-btn { display: block; }
  .nav-panel {
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--cloud);
    border-bottom: 2px solid var(--signal);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease);
  }
  .nav-panel.open { max-height: 360px; }
  .nav-links { flex-direction: column; padding: 0.7rem 1rem 1.2rem; }
  .nav-links a { padding: 0.68rem 0.4rem; }
  .topbar { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--fog); }
}

/* —— hero —— */
.hero-plane {
  position: relative;
  min-height: min(92vh, 740px);
  display: flex;
  align-items: flex-end;
  color: var(--cloud);
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
}
.hero-plane > picture {
  position: absolute;
  inset: 0;
  z-index: -2;
  display: block;
}
.hero-plane img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: drift 18s ease-in-out infinite alternate;
}
.hero-plane::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(105deg, rgba(12, 36, 56, 0.92) 0%, rgba(12, 36, 56, 0.55) 48%, rgba(12, 36, 56, 0.2) 100%),
    linear-gradient(to top, rgba(12, 36, 56, 0.85) 0%, transparent 48%);
  pointer-events: none;
}
.hero-copy {
  padding: 4.75rem 0 3.75rem;
  max-width: 38rem;
  animation: lift 0.9s var(--ease) both;
}
.hero-copy .brand-lock {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.35rem, 6.2vw, 3.85rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.hero-copy .lede {
  font-size: clamp(1rem, 2vw, 1.12rem);
  color: rgba(228, 238, 243, 0.88);
  max-width: 34ch;
  margin-bottom: 1.7rem;
}
.cta-pack { display: flex; flex-wrap: wrap; gap: 0.7rem; }

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  padding: 0.82rem 1.3rem;
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}
.pill:hover { transform: translateY(-2px); }
.pill-signal { background: var(--signal); color: #fff; }
.pill-signal:hover { background: var(--signal-deep); }
.pill-ghost {
  background: transparent;
  color: var(--cloud);
  border: 1.5px solid rgba(255, 255, 255, 0.45);
}
.pill-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }
.pill-ink { background: var(--ink); color: var(--cloud); }
.pill-ink:hover { background: var(--signal); }
.pill-line {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
}
.pill-line:hover { background: var(--ink); color: var(--cloud); }

/* —— sections —— */
.block {
  padding: clamp(3.4rem, 7.5vw, 5.4rem) 0;
  content-visibility: auto;
  contain-intrinsic-size: 1px 680px;
}
.hero-plane + .block,
.page-band + .block,
.block:first-of-type {
  content-visibility: visible;
  contain-intrinsic-size: auto;
}
.block-cloud { background: rgba(255, 255, 255, 0.72); }
.block-ink {
  background: var(--ink);
  color: var(--cloud);
}
.block-ink .eyebrow { color: var(--flare); }
.block-ink .soft { color: rgba(228, 238, 243, 0.72); }

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 0.55rem;
}
.heading {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4vw, 2.55rem);
  line-height: 1.15;
  max-width: 14ch;
}
.heading::after {
  content: "";
  display: block;
  width: 2.6rem;
  height: 3px;
  background: var(--signal);
  margin-top: 0.8rem;
}
.soft {
  margin-top: 0.95rem;
  color: var(--mute);
  max-width: 42ch;
  font-size: 0.98rem;
}

/* —— product mosaic (unique vs lane rows) —— */
.mosaic {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 0.9rem;
}
.tile {
  position: relative;
  display: block;
  overflow: hidden;
  color: var(--cloud);
  min-height: 220px;
  isolation: isolate;
}
.tile:first-child {
  grid-row: 1 / 3;
  min-height: 100%;
}
.tile picture, .tile img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  transition: transform 0.7s var(--ease);
}
.tile::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(to top, rgba(12, 36, 56, 0.88) 0%, rgba(12, 36, 56, 0.15) 65%);
}
.tile:hover img { transform: scale(1.06); }
.tile-body {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 1.35rem 1.25rem;
}
.tile-tag {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--flare);
  margin-bottom: 0.35rem;
}
.tile h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 800;
}
.tile p {
  margin-top: 0.3rem;
  font-size: 0.86rem;
  color: rgba(228, 238, 243, 0.8);
  max-width: 28ch;
}
@media (max-width: 860px) {
  .mosaic { grid-template-columns: 1fr 1fr; }
  .tile:first-child { grid-row: auto; min-height: 260px; grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .mosaic { grid-template-columns: 1fr; }
  .tile:first-child { grid-column: auto; }
}

/* —— split story —— */
.duo {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.4rem, 4vw, 3rem);
  align-items: center;
}
.duo-visual { overflow: hidden; }
.duo-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.duo-copy .heading { max-width: 12ch; }
.duo-copy p { margin-top: 1rem; color: var(--mute); }
.duo-copy p + p { margin-top: 0.8rem; }
@media (max-width: 800px) { .duo { grid-template-columns: 1fr; } }

/* —— promise strip —— */
.promise {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  margin-top: 2.2rem;
}
.promise article {
  border-top: 3px solid var(--signal);
  padding-top: 1rem;
}
.promise h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
}
.promise p { font-size: 0.92rem; color: var(--mute); }
.block-ink .promise p { color: rgba(228, 238, 243, 0.72); }
.block-ink .promise article { border-top-color: var(--flare); }
@media (max-width: 720px) { .promise { grid-template-columns: 1fr; } }

/* —— dispatch list —— */
.feed { margin-top: 2rem; border-top: 1px solid var(--line); }
.feed-row {
  display: grid;
  grid-template-columns: 6rem 1fr auto;
  gap: 1.2rem;
  align-items: baseline;
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.3s var(--ease);
}
.feed-row:hover { padding-left: 0.4rem; }
.feed-row time {
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--signal);
}
.feed-row h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}
.feed-row p { font-size: 0.9rem; color: var(--mute); }
.feed-row .more {
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 800;
  color: var(--signal);
  white-space: nowrap;
}
@media (max-width: 640px) {
  .feed-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .feed-row .more { display: none; }
}

/* —— catalog grid —— */
.shelf {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-top: 2.2rem;
}
.shelf a { display: block; color: inherit; }
.shelf figure {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--mist);
}
.shelf img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--ease);
}
.shelf a:hover img { transform: scale(1.05); }
.shelf h3 {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 800;
  margin-top: 0.8rem;
}
.shelf p {
  font-size: 0.88rem;
  color: var(--mute);
  margin-top: 0.28rem;
}
@media (max-width: 860px) { .shelf { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .shelf { grid-template-columns: 1fr; } }

/* —— page banner —— */
.page-band {
  position: relative;
  min-height: 250px;
  display: flex;
  align-items: flex-end;
  color: var(--cloud);
  background: var(--ink);
  isolation: isolate;
  overflow: hidden;
}
.page-band > picture {
  position: absolute;
  inset: 0;
  z-index: -2;
  display: block;
}
.page-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(to top, rgba(12, 36, 56, 0.9), rgba(12, 36, 56, 0.35));
  pointer-events: none;
}
.page-band-body {
  padding: 3rem 0 2.1rem;
  max-width: 36rem;
  animation: lift 0.7s var(--ease) both;
}
.page-band h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  margin: 0.3rem 0 0.65rem;
}
.page-band p { color: rgba(228, 238, 243, 0.8); max-width: 36ch; }
.page-band .eyebrow { color: var(--flare); }

/* —— product detail —— */
.facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 2.3rem;
}
.facts li {
  background: var(--cloud);
  padding: 1.15rem 1.25rem;
}
.facts strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 0.35rem;
}
@media (max-width: 560px) { .facts { grid-template-columns: 1fr; } }

.also {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.7rem;
}
.also a { display: block; color: inherit; }
.also img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.also a:hover img { transform: scale(1.04); }
.also span {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  margin-top: 0.6rem;
}
@media (max-width: 700px) { .also { grid-template-columns: 1fr; } }

/* —— contact —— */
.reach {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.4rem, 4vw, 2.8rem);
  align-items: start;
}
.reach dl { margin-top: 1.4rem; }
.reach dt {
  font-family: var(--font-display);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
  margin-top: 1.05rem;
}
.reach dt:first-child { margin-top: 0; }
.reach dd { margin-top: 0.28rem; font-size: 1.02rem; }
.reach dd a {
  color: var(--signal-deep);
  border-bottom: 1px solid transparent;
}
.reach dd a:hover { border-bottom-color: var(--signal); }
.reach-shot img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
@media (max-width: 720px) { .reach { grid-template-columns: 1fr; } }

.form-panel {
  background: var(--cloud);
  border: 1px solid var(--line);
  padding: 1.4rem 1.35rem 1.5rem;
  margin-top: 1.5rem;
}
.form-panel h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}
.field { margin-bottom: 0.9rem; }
.field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.field .need { color: var(--flare); margin-left: 0.15rem; }
.field input,
.field textarea {
  width: 100%;
  border: 1.5px solid var(--line);
  background: var(--fog);
  color: var(--ink);
  font: inherit;
  padding: 0.65rem 0.75rem;
  outline: none;
  transition: border-color 0.2s;
}
.field input:focus,
.field textarea:focus { border-color: var(--signal); }
.field textarea { min-height: 120px; resize: vertical; }
.form-note {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--mute);
}

/* —— prose —— */
.prose { max-width: 42rem; }
.prose p + p { margin-top: 1rem; }
.prose h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin: 2rem 0 0.7rem;
}
.prose h2:first-child { margin-top: 0; }
.prose ul, .prose ol {
  padding-left: 1.25rem;
  margin-top: 0.7rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-top: 0.4rem; color: var(--mute); }

/* —— footer —— */
.foot {
  background: var(--ink);
  color: rgba(228, 238, 243, 0.7);
  padding: 3.4rem 0 1.4rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 1.8rem;
  padding-bottom: 2.3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.foot h2 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--cloud);
  margin-bottom: 0.8rem;
}
.foot p { font-size: 0.88rem; line-height: 1.65; }
.foot p + p { margin-top: 0.35rem; }
.foot-links a {
  display: block;
  font-size: 0.88rem;
  padding: 0.22rem 0;
  color: rgba(228, 238, 243, 0.7);
  transition: color 0.2s;
}
.foot-links a:hover { color: var(--flare); }
.foot-bar {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 1.2rem;
  font-size: 0.76rem;
  color: rgba(228, 238, 243, 0.45);
}
@media (max-width: 900px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .foot-grid { grid-template-columns: 1fr; } }

/* —— motion —— */
.js .rise:not(.shown) {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.js .rise.shown { opacity: 1; transform: none; }

@keyframes lift {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}
@keyframes drift {
  from { transform: scale(1.02) translateY(0); }
  to { transform: scale(1.08) translateY(-1.5%); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .rise:not(.shown),
  .js .rise.shown { opacity: 1; transform: none; transition: none; }
  .hero-copy, .page-band-body { animation: none; }
  .hero-plane img { animation: none; }
  .tile img, .shelf img, .also img { transition: none; }
  .pill:hover { transform: none; }
}

.duo-visual picture,
.reach-shot picture,
.shelf figure picture,
.also a picture { display: block; width: 100%; height: 100%; }
.duo-visual picture img,
.reach-shot picture img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.shelf figure picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.also a picture img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.tile picture { position: absolute; inset: 0; z-index: -2; }