/* 松辰科技 — Brand: Navy / Electric Blue / Orange */
:root {
  --navy: #071428;
  --navy-2: #0c1f3d;
  --ink: #e8eef8;
  --muted: #8fa3c0;
  --blue: #2f7bff;
  --blue-bright: #5ca0ff;
  --cyan: #3ecbff;
  --orange: #ff6a1a;
  --orange-soft: #ff8f4d;
  --line: rgba(255, 255, 255, 0.08);
  --glass: rgba(12, 31, 61, 0.55);
  --radius: 4px;
  --font-display: "Syne", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--navy);
  color: var(--ink);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

#particles-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  transition: background 0.35s var(--ease), backdrop-filter 0.35s, border-color 0.35s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(7, 20, 40, 0.78);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}

.brand-logo {
  height: 48px;
  width: auto;
  filter: drop-shadow(0 2px 12px rgba(47, 123, 255, 0.25));
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.25s;
}

.nav a:hover {
  color: var(--ink);
}

.nav-cta {
  color: var(--navy) !important;
  background: linear-gradient(135deg, var(--orange), var(--orange-soft));
  padding: 0.55rem 1.1rem;
  font-weight: 700 !important;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.nav-cta:hover {
  filter: brightness(1.08);
}

.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
}

.menu-btn span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  transition: transform 0.3s var(--ease);
}

.menu-btn[aria-expanded="true"] span:first-child {
  transform: translateY(4.5px) rotate(45deg);
}

.menu-btn[aria-expanded="true"] span:last-child {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 32px) 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(47, 123, 255, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(255, 106, 26, 0.08), transparent 50%),
    linear-gradient(180deg, rgba(5, 13, 28, 0.55) 0%, rgba(7, 20, 40, 0.35) 45%, rgba(10, 26, 51, 0.5) 100%);
}

.hero-photo {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(5, 13, 28, 0.88) 28%, rgba(7, 20, 40, 0.62) 58%, rgba(7, 20, 40, 0.82) 100%),
    url("images/hero-earth.jpg")
      center / cover no-repeat;
  opacity: 0.42;
  mix-blend-mode: normal;
}

.service-media,
.capability-thumb,
.case-media,
.media-tile,
.visual-band-item,
.split-visual-media,
.process-visual {
  background: rgba(12, 31, 61, 0.9);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  animation: float 10s ease-in-out infinite;
}

.hero-orb--a {
  width: min(48vw, 520px);
  height: min(48vw, 520px);
  top: -8%;
  right: -5%;
  background: rgba(47, 123, 255, 0.22);
}

.hero-orb--b {
  width: min(36vw, 380px);
  height: min(36vw, 380px);
  bottom: 5%;
  left: -8%;
  background: rgba(255, 106, 26, 0.12);
  animation-delay: -4s;
}

.hero-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255, 255, 255, 0.015) 3px,
    rgba(255, 255, 255, 0.015) 4px
  );
  mask-image: linear-gradient(180deg, transparent, #000 20%, #000 80%, transparent);
  animation: scan 8s linear infinite;
  opacity: 0.5;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 24px) scale(1.05); }
}

@keyframes scan {
  0% { transform: translateY(-8%); }
  100% { transform: translateY(8%); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(920px, 100%);
  margin-inline: auto;
  text-align: center;
}

.hero-brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.22em;
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  color: var(--cyan);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 8vw, 5.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 1.35rem;
}

.hero-title .line {
  display: block;
}

.hero-title .accent {
  background: linear-gradient(105deg, var(--blue-bright), var(--cyan) 45%, var(--orange-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 34rem;
  margin: 0 auto 2rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.95rem 1.55rem;
  font-weight: 700;
  font-size: 0.98rem;
  transition: transform 0.25s var(--ease), filter 0.25s, background 0.25s, color 0.25s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), #1a5de0 40%, var(--orange));
  background-size: 160% 160%;
  color: #fff;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  animation: shimmer 4s ease infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  color: var(--muted);
}

.hero-scroll i {
  width: 1px;
  height: 42px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  animation: pulse-line 1.8s ease-in-out infinite;
}

@keyframes pulse-line {
  0%, 100% { opacity: 0.3; transform: scaleY(0.7); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Sections */
.section {
  position: relative;
  z-index: 1;
  padding: 110px 0;
  content-visibility: auto;
  contain-intrinsic-size: 1px 900px;
}

.hero.section,
.hero {
  content-visibility: visible;
}

.section-head {
  max-width: 560px;
  margin-bottom: 56px;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin-bottom: 0.75rem;
}

.section-head h2,
.geo-copy h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.section-desc,
.geo-copy > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.geo-copy > p + p {
  margin-top: 1rem;
}

.geo-copy strong {
  color: var(--ink);
  font-weight: 700;
}

/* Services */
.services {
  background: linear-gradient(180deg, transparent, rgba(15, 40, 80, 0.18) 30%, transparent);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.service-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0;
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(47, 123, 255, 0.08), transparent 40%),
    rgba(8, 22, 44, 0.7);
  overflow: hidden;
  transition: border-color 0.35s, transform 0.35s var(--ease);
  color: inherit;
  text-decoration: none;
}

.service-panel:hover {
  border-color: rgba(47, 123, 255, 0.45);
  transform: translateY(-4px);
}

.service-panel--geo {
  background:
    linear-gradient(160deg, rgba(255, 106, 26, 0.1), transparent 42%),
    rgba(8, 22, 44, 0.7);
}

.service-panel--geo:hover {
  border-color: rgba(255, 106, 26, 0.45);
}

.service-media {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.service-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.service-panel:hover .service-media img {
  transform: scale(1.06);
}

.service-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5, 14, 28, 0.85));
  pointer-events: none;
}

.service-body {
  padding: 28px 28px 26px;
}

.service-index {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--blue-bright);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.service-panel--geo .service-index {
  color: var(--orange-soft);
}

.service-panel h3 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-panel .service-body > p {
  color: var(--muted);
  margin-bottom: 1.25rem;
  font-size: 0.98rem;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.5rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.92rem;
  color: #c5d4ea;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.service-panel--geo .feature-list li::before {
  background: var(--orange);
}

.service-more {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.service-panel--geo .service-more {
  color: var(--orange-soft);
}

/* Visual band */
.visual-band {
  position: relative;
  z-index: 1;
  padding: 0 0 8px;
  overflow: hidden;
}

.visual-band-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  width: min(1200px, calc(100% - 32px));
  margin-inline: auto;
}

.visual-band-item {
  margin: 0;
  height: 140px;
  overflow: hidden;
  border: 1px solid var(--line);
  opacity: 0.88;
}

.visual-band-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
  transition: transform 0.7s var(--ease), filter 0.4s;
}

.visual-band-item:hover img {
  transform: scale(1.08);
  filter: saturate(1.05) contrast(1.08);
}

/* Split visual */
.split-visual {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
  margin-bottom: 36px;
}

.split-visual-media {
  overflow: hidden;
  border: 1px solid var(--line);
  min-height: 280px;
}

.split-visual-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

.split-visual-copy h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.split-visual-copy > p {
  color: var(--muted);
  margin-bottom: 1.1rem;
}

.split-visual-list {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.split-visual-list li {
  position: relative;
  padding-left: 1.1rem;
  color: #c5d4ea;
  font-size: 0.95rem;
}

.split-visual-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

/* Media row (GEO) */
.media-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 36px;
}

.media-tile {
  margin: 0;
  border: 1px solid var(--line);
  background: rgba(5, 14, 28, 0.55);
  overflow: hidden;
}

.media-tile img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}

.media-tile figcaption {
  padding: 12px 14px;
  font-size: 0.85rem;
  color: var(--muted);
}

.process-visual {
  margin-bottom: 36px;
  overflow: hidden;
  border: 1px solid var(--line);
  max-height: 280px;
}

.process-visual img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  filter: saturate(0.9);
}

/* Detail / Dev / Cases */
.detail {
  background: linear-gradient(180deg, rgba(8, 22, 44, 0.28), transparent);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.capability {
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(5, 14, 28, 0.55);
  border-top: 2px solid rgba(47, 123, 255, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.capability-thumb {
  height: 110px;
  overflow: hidden;
}

.capability-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.capability:hover .capability-thumb img {
  transform: scale(1.06);
}

.capability h3 {
  font-size: 1.05rem;
  margin: 14px 16px 0.55rem;
}

.capability p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0 16px 16px;
}

.stack-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin-bottom: 48px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: rgba(47, 123, 255, 0.05);
}

.stack-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stack-tags span {
  font-size: 0.82rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(92, 160, 255, 0.25);
  color: #c5d4ea;
  background: rgba(8, 22, 44, 0.6);
}

.detail-block {
  margin-bottom: 48px;
}

.detail-block-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.deliver-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.deliver-item {
  padding: 22px 18px;
  background: rgba(5, 14, 28, 0.55);
  border: 1px solid var(--line);
}

.deliver-item span {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  color: rgba(92, 160, 255, 0.45);
  margin-bottom: 0.65rem;
}

.deliver-item h4 {
  font-size: 1.02rem;
  margin-bottom: 0.45rem;
}

.deliver-item p {
  color: var(--muted);
  font-size: 0.88rem;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.case-card {
  padding: 0;
  border: 1px solid var(--line);
  background:
    linear-gradient(165deg, rgba(47, 123, 255, 0.07), transparent 45%),
    rgba(5, 14, 28, 0.7);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}

.case-media {
  height: 150px;
  overflow: hidden;
}

.case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s var(--ease);
}

.case-card:hover .case-media img {
  transform: scale(1.05);
}

.case-card .case-meta,
.case-card h4,
.case-card .case-desc,
.case-card .case-result,
.case-card .case-stats {
  margin-left: 22px;
  margin-right: 22px;
}

.case-card .case-meta {
  margin-top: 18px;
}

.case-card .case-result,
.case-card .case-stats {
  margin-bottom: 22px;
}

.case-card--geo {
  background:
    linear-gradient(165deg, rgba(255, 106, 26, 0.08), transparent 45%),
    rgba(5, 14, 28, 0.7);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.case-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  background: rgba(47, 123, 255, 0.2);
  color: var(--blue-bright);
  letter-spacing: 0.04em;
}

.case-tag--geo {
  background: rgba(255, 106, 26, 0.18);
  color: var(--orange-soft);
}

.case-type {
  font-size: 0.78rem;
  color: var(--muted);
  align-self: center;
}

.case-card h4 {
  font-size: 1.12rem;
  line-height: 1.35;
  margin-bottom: 0.7rem;
}

.case-desc {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  flex: 1;
}

.case-result {
  list-style: none;
  display: grid;
  gap: 0.4rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.case-result li {
  font-size: 0.88rem;
  color: #c5d4ea;
}

.case-result strong {
  color: var(--cyan);
  font-weight: 700;
  margin-right: 0.35rem;
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  text-align: center;
}

.case-stats div {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.case-stats b {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--orange-soft);
}

.case-stats span {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.3;
}

/* GEO expanded */
.geo {
  background:
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(255, 106, 26, 0.08), transparent 50%),
    radial-gradient(ellipse 50% 40% at 10% 60%, rgba(47, 123, 255, 0.1), transparent 55%);
}

.geo-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 36px;
}

.geo-subhead {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.85rem;
}

.geo-points--wide {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0 0 48px;
}

.geo-point {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.geo-point-num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--blue-bright);
  font-size: 0.9rem;
}

.geo-point h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.geo-point p {
  color: var(--muted);
  font-size: 0.9rem;
}

.geo-points--wide .geo-point {
  border: 1px solid var(--line);
  padding: 20px 18px;
  background: rgba(5, 14, 28, 0.45);
  flex-direction: column;
  gap: 0.65rem;
}

.geo-points--wide .geo-point-num {
  margin-bottom: 0.15rem;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.method-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: rgba(5, 14, 28, 0.55);
}

.method-card h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--ink);
}

.method-card p {
  color: var(--muted);
  font-size: 0.88rem;
}

.geo-note {
  margin-top: 28px;
  padding: 16px 20px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 106, 26, 0.06);
}

.geo-note p {
  color: var(--muted);
  font-size: 0.9rem;
}

.chat-mock {
  border: 1px solid var(--line);
  background: rgba(5, 14, 28, 0.85);
  padding: 20px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.chat-head .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #28c840;
  box-shadow: 0 0 10px #28c840;
}

.chat-bubble {
  padding: 14px 16px;
  margin-bottom: 12px;
  font-size: 0.92rem;
  line-height: 1.55;
  max-width: 92%;
}

.chat-bubble--user {
  margin-left: auto;
  background: rgba(47, 123, 255, 0.2);
  border: 1px solid rgba(47, 123, 255, 0.3);
}

.chat-bubble--ai {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: #c5d4ea;
}

.chat-bubble--ai p + p {
  margin-top: 0.55rem;
}

.chat-highlight {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem !important;
  color: var(--ink) !important;
  background: linear-gradient(90deg, rgba(255, 106, 26, 0.25), transparent);
  padding: 0.35rem 0.5rem;
  border-left: 3px solid var(--orange);
}

/* Process */
.process-track {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: none;
}

.process-step {
  position: relative;
  padding: 28px 22px;
  border-top: 2px solid rgba(47, 123, 255, 0.35);
  background: linear-gradient(180deg, rgba(47, 123, 255, 0.06), transparent);
}

.process-step::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 40%;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--blue));
}

.step-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: rgba(92, 160, 255, 0.45);
  margin-bottom: 0.85rem;
}

.process-step h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.process-step p {
  color: var(--muted);
  font-size: 0.92rem;
}

/* Contact */
.contact {
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(47, 123, 255, 0.14), transparent 55%),
    radial-gradient(ellipse 40% 40% at 90% 80%, rgba(255, 106, 26, 0.08), transparent 50%);
}

.contact-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}

.contact-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.contact-head .accent {
  background: linear-gradient(105deg, var(--cyan), var(--blue-bright) 50%, var(--orange-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.contact-head > p:last-child {
  color: var(--muted);
  font-size: 1.02rem;
}

.contact-panel {
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(10, 24, 48, 0.92), rgba(10, 24, 48, 0.92)) padding-box,
    linear-gradient(135deg, rgba(62, 203, 255, 0.55), rgba(47, 123, 255, 0.35), rgba(255, 106, 26, 0.45)) border-box;
  padding: 40px 36px 36px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

.contact-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 32px;
  align-items: stretch;
}

.contact-item {
  text-align: center;
  padding: 12px 14px;
  position: relative;
  display: grid;
  grid-template-rows: 48px 1.4em 3.2em 4.5em;
  row-gap: 12px;
  align-items: start;
  justify-items: center;
}

.contact-item + .contact-item::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 12%;
  bottom: 12%;
  width: 1px;
  background: var(--line);
}

.contact-icon {
  width: 48px;
  height: 48px;
  margin: 0;
  display: grid;
  place-items: center;
  color: var(--cyan);
  background: rgba(47, 123, 255, 0.12);
  border: 1px solid rgba(92, 160, 255, 0.25);
}

.contact-icon--hot {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--orange));
  border: none;
  box-shadow: 0 10px 28px rgba(47, 123, 255, 0.35);
}

.contact-item-label {
  font-size: 0.88rem;
  color: var(--cyan);
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
}

.contact-item-main {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.35;
  color: var(--ink);
  margin: 0;
  word-break: break-word;
}

.contact-phone {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  background: linear-gradient(105deg, var(--blue-bright), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}

.contact-item-sub {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
  max-width: 17em;
  margin: 0;
  align-self: start;
}

.contact-todo {
  color: #ff2d2d !important;
  -webkit-text-fill-color: #ff2d2d;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 36px 0 48px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-logo {
  height: 36px;
  width: auto;
  opacity: 0.9;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.85rem;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.hero .reveal {
  transition-delay: 0s;
}

.hero .reveal:nth-child(1) { transition-delay: 0.05s; }
.hero .reveal:nth-child(2) { transition-delay: 0.15s; }
.hero .reveal:nth-child(3) { transition-delay: 0.28s; }
.hero .reveal:nth-child(4) { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 900px) {
  .service-grid,
  .geo-layout,
  .process-track,
  .contact-cols,
  .capability-grid,
  .deliver-grid,
  .case-grid,
  .method-grid,
  .geo-points--wide,
  .split-visual,
  .media-row,
  .visual-band-track {
    grid-template-columns: 1fr;
  }

  .visual-band-track {
    grid-template-columns: 1fr 1fr;
  }

  .capability-grid {
    grid-template-columns: 1fr 1fr;
  }

  .case-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact-item {
    grid-template-rows: 48px auto auto auto;
  }

  .contact-item + .contact-item::before {
    display: none;
  }

  .contact-panel {
    padding: 28px 20px 24px;
  }

  .contact-item--phone {
    order: -1;
  }

  .process-track {
    gap: 12px;
  }

  .menu-btn {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 24px;
    background: rgba(7, 20, 40, 0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s;
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    padding: 14px 8px;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 12px;
    text-align: center;
    clip-path: none;
  }

  .hero-title {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }
}

@media (max-width: 560px) {
  .container {
    width: calc(100% - 32px);
  }

  .site-header {
    padding: 0 16px;
  }

  .brand-logo {
    height: 34px;
  }

  .section {
    padding: 80px 0;
  }

  .service-body {
    padding: 22px 18px 20px;
  }

  .capability-grid,
  .visual-band-track {
    grid-template-columns: 1fr;
  }

  .case-stats {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .case-stats div {
    flex-direction: row;
    align-items: baseline;
    gap: 0.6rem;
  }

  .case-card .case-meta,
  .case-card h4,
  .case-card .case-desc,
  .case-card .case-result,
  .case-card .case-stats {
    margin-left: 16px;
    margin-right: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}