:root {
  --ink: #0c1b2a;
  --muted: #5e6b78;
  --paper: #f7f9fc;
  --card: #ffffff;
  --line: rgba(12, 27, 42, 0.12);
  --navy: #0a1830;
  --accent: #2462ad;
  --accent-2: #1599c8;
  --accent-soft: rgba(20, 135, 212, 0.12);
  --shadow: 0 18px 50px rgba(22, 58, 101, 0.09);
  --radius: 18px;
  --max: 1180px;
}

body[data-theme="dste"] {
  --accent: #315ba8;
  --accent-2: #5c83ca;
  --accent-soft: rgba(49, 91, 168, 0.1);
}

body[data-theme="ltc"] {
  --accent: #2970a5;
  --accent-2: #d0a03a;
  --accent-soft: rgba(41, 112, 165, 0.1);
}

body[data-theme="itr"] {
  --accent: #18758f;
  --accent-2: #2b9eb5;
  --accent-soft: rgba(24, 117, 143, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
summary {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 999;
  padding: 10px 16px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  inset: 0 0 auto;
  z-index: 20;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(12, 27, 42, 0.08);
  backdrop-filter: blur(18px);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand img {
  width: 102px;
  height: auto;
}

.brand-note {
  padding-left: 14px;
  color: #7c8997;
  font-size: 12px;
  letter-spacing: 0.18em;
  border-left: 1px solid rgba(12, 27, 42, 0.15);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
}

.top-nav a {
  color: #455263;
  transition: color 0.2s ease;
}

.top-nav a:hover,
.top-nav a:focus-visible {
  color: var(--accent);
}

.solution-back {
  padding: 8px 14px;
  color: var(--accent) !important;
  font-weight: 700;
  background: var(--accent-soft);
  border-radius: 999px;
}

.solution-back:hover,
.solution-back:focus-visible {
  background: color-mix(in srgb, var(--accent) 17%, #fff);
}

.nav-cta {
  padding: 9px 20px;
  color: #fff !important;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(12, 27, 42, 0.16);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  content: "";
}

.banner {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 42%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 27%),
    linear-gradient(180deg, #fbfcfe 0%, #f4f7fb 100%);
}

.banner::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(36, 98, 173, 0.12) 0.8px, transparent 0.8px);
  background-size: 18px 18px;
  mask-image: linear-gradient(to bottom, #000, transparent 94%);
  content: "";
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(340px, 0.78fr);
  gap: 70px;
  align-items: center;
  min-height: 650px;
  padding-top: 48px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 30px;
  height: 2px;
  background: currentColor;
  content: "";
}

.tit-cn {
  max-width: 800px;
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: clamp(48px, 6.4vw, 78px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.title-code {
  white-space: nowrap;
}

.hero-lead {
  max-width: 700px;
  margin: 28px 0 0;
  color: #5c6877;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 14px 35px color-mix(in srgb, var(--accent) 24%, transparent);
}

.button-ghost {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
}

.hero-note {
  margin: 26px 0 0;
  color: #7a8795;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  min-height: 420px;
}

.orbit {
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(36, 98, 173, 0.17);
  border-radius: 50%;
}

.orbit::before,
.orbit::after {
  position: absolute;
  inset: 13%;
  border: 1px dashed rgba(36, 98, 173, 0.22);
  border-radius: inherit;
  content: "";
}

.orbit::after {
  inset: 31%;
  border-style: solid;
  border-color: color-mix(in srgb, var(--accent-2) 55%, transparent);
  box-shadow: 0 0 70px color-mix(in srgb, var(--accent) 22%, transparent);
}

.core-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 128px;
  height: 128px;
  place-items: center;
  color: #fff;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #0a1830));
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 32px;
  box-shadow: 0 22px 70px color-mix(in srgb, var(--accent) 42%, transparent);
  transform: translate(-50%, -50%) rotate(8deg);
}

.core-mark span {
  transform: rotate(-8deg);
}

.node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  color: #365064;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(36, 98, 173, 0.16);
  box-shadow: 0 10px 30px rgba(22, 58, 101, 0.08);
  border-radius: 999px;
  backdrop-filter: blur(12px);
}

.node::before {
  width: 7px;
  height: 7px;
  background: var(--accent-2);
  border-radius: 50%;
  box-shadow: 0 0 16px var(--accent-2);
  content: "";
}

.node-a { top: 12%; left: 4%; }
.node-b { top: 19%; right: 0; }
.node-c { right: 2%; bottom: 21%; }
.node-d { bottom: 10%; left: 8%; }

.solution-nav {
  position: relative;
  z-index: 5;
  margin-top: -30px;
}

.solution-nav-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.solution-nav a {
  position: relative;
  padding: 24px 24px 22px;
  border-right: 1px solid var(--line);
}

.solution-nav a:last-child {
  border-right: 0;
}

.solution-nav small {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.solution-nav strong {
  font-size: 16px;
}

.solution-nav a[aria-current="page"] {
  background: var(--accent-soft);
}

.solution-nav a[aria-current="page"]::after {
  position: absolute;
  right: 18px;
  bottom: 12px;
  left: 18px;
  height: 3px;
  background: var(--accent);
  border-radius: 99px;
  content: "";
}

.section {
  padding: 104px 0;
}

.section-white {
  background: #fff;
}

.section-dark {
  color: var(--ink);
  background: #edf3fa;
}

.section-head {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 80px;
  align-items: end;
  margin-bottom: 56px;
}

.kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.section-dark .kicker {
  color: var(--accent);
}

.section h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.section-intro {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.section-dark .section-intro {
  color: var(--muted);
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.pain-card {
  min-height: 250px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 38px rgba(7, 27, 47, 0.05);
}

.pain-card .index {
  display: block;
  margin-bottom: 42px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.pain-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  line-height: 1.45;
}

.pain-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  counter-reset: flow;
}

.flow-step {
  position: relative;
  min-height: 196px;
  padding: 24px 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(36, 98, 173, 0.13);
  border-radius: 18px;
  counter-increment: flow;
}

.flow-step::before {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 34px;
  place-items: center;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: 50%;
  content: counter(flow, decimal-leading-zero);
}

.flow-step:not(:last-child)::after {
  position: absolute;
  top: 40px;
  right: -13px;
  z-index: 2;
  width: 13px;
  height: 1px;
  background: var(--accent);
  content: "";
}

.flow-step h3 {
  margin: 0 0 9px;
  font-size: 17px;
}

.flow-step p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.ai-panel {
  position: relative;
  overflow: hidden;
  padding: 52px;
  background: linear-gradient(135deg, var(--accent-soft), rgba(255, 255, 255, 0.9));
  border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
  border-radius: 30px;
}

.ai-panel::after {
  position: absolute;
  right: -110px;
  bottom: -140px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 25%, transparent), transparent 68%);
  border-radius: 50%;
  content: "";
}

.ai-head {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ai-title {
  margin: 0;
  font-size: clamp(34px, 4vw, 50px);
  line-height: 1.18;
}

.ai-title span {
  color: var(--accent);
}

.ai-copy {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.ai-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.ai-item {
  padding: 24px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 18px;
  backdrop-filter: blur(8px);
}

.ai-item strong {
  display: block;
  margin-bottom: 8px;
  font-size: 17px;
}

.ai-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.deliverables {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.deliverable {
  position: relative;
  min-height: 230px;
  padding: 30px 32px;
  overflow: hidden;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 12px 36px rgba(22, 58, 101, 0.06);
  border-radius: 22px;
}

.deliverable::after {
  position: absolute;
  top: -50px;
  right: -50px;
  width: 180px;
  height: 180px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.16;
  filter: blur(4px);
  content: "";
}

.deliverable-tag {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.deliverable h3 {
  margin: 46px 0 10px;
  font-size: 24px;
}

.deliverable p {
  max-width: 470px;
  margin: 0;
  color: var(--muted);
}

.phases {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.phase {
  padding-top: 22px;
  border-top: 3px solid var(--accent);
}

.phase small {
  color: var(--accent);
  font-weight: 800;
}

.phase h3 {
  margin: 18px 0 10px;
  font-size: 21px;
}

.phase p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.principle-band {
  padding: 42px 0;
  color: #fff;
  background: var(--accent);
}

.principle-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  align-items: center;
}

.principle-band h2 {
  margin: 0;
  font-size: clamp(28px, 3.5vw, 44px);
  line-height: 1.25;
}

.principle-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
}

.bootcamp-section {
  position: relative;
  overflow: hidden;
  padding: 94px 0;
  color: #fff;
  background:
    radial-gradient(circle at 86% 12%, color-mix(in srgb, var(--accent) 44%, transparent), transparent 30%),
    linear-gradient(135deg, #07182b 0%, #0b2945 100%);
}

.bootcamp-section::after {
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 430px;
  height: 430px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  box-shadow: 0 0 0 68px rgba(255, 255, 255, 0.025), 0 0 0 136px rgba(255, 255, 255, 0.018);
  pointer-events: none;
  content: "";
}

.bootcamp-section .shell {
  position: relative;
  z-index: 1;
}

.bootcamp-head {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 76px;
  align-items: end;
}

.bootcamp-head .kicker {
  color: var(--accent-2);
}

.bootcamp-head h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(36px, 4.6vw, 58px);
  line-height: 1.2;
}

.bootcamp-head > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 17px;
  line-height: 1.9;
}

.bootcamp-path {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 54px;
}

.bootcamp-path article {
  min-height: 250px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  backdrop-filter: blur(8px);
}

.bootcamp-path span {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 52px;
  place-items: center;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 800;
  border: 1px solid color-mix(in srgb, var(--accent-2) 52%, transparent);
  border-radius: 50%;
}

.bootcamp-path strong {
  display: block;
  margin-bottom: 12px;
  font-size: 19px;
}

.bootcamp-path p {
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.bootcamp-signals {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.bootcamp-signals span {
  padding: 10px 12px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
}

.case-section {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 84% 20%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 26%),
    linear-gradient(180deg, #f7f9fc 0%, #eef4fa 100%);
}

.case-section::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(36, 98, 173, 0.12) 0.8px, transparent 0.8px);
  background-size: 18px 18px;
  mask-image: linear-gradient(90deg, #000, transparent 72%);
  pointer-events: none;
  content: "";
}

.case-section .shell {
  position: relative;
  z-index: 1;
}

.case-viewport {
  min-height: 650px;
}

.case-slide[hidden] {
  display: none;
}

.case-slide.is-active {
  animation: case-enter 0.45s ease both;
}

@keyframes case-enter {
  from { opacity: 0; transform: translateX(18px); }
  to { opacity: 1; transform: translateX(0); }
}

.case-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.case-label .kicker {
  margin: 0;
}

.case-label span {
  color: var(--muted);
  font-size: 13px;
}

.case-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: 70px;
  align-items: center;
  padding: 54px 0 48px;
}

.case-hero h2 {
  max-width: 880px;
  font-size: clamp(34px, 4.6vw, 58px);
}

.case-quote {
  max-width: 900px;
  margin: 24px 0 0;
  color: #48586b;
  font-size: 18px;
  line-height: 1.9;
}

.case-mark {
  display: grid;
  width: 156px;
  height: 156px;
  place-items: center;
  color: #fff;
  background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 58%, #0a1830));
  border-radius: 42px;
  box-shadow: 0 22px 55px color-mix(in srgb, var(--accent) 28%, transparent);
  transform: rotate(7deg);
}

.case-mark span {
  font-size: 28px;
  font-weight: 800;
  transform: rotate(-7deg);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.case-grid > div {
  min-height: 220px;
  padding: 30px;
  background: rgba(255, 255, 255, 0.94);
}

.case-grid small {
  display: block;
  margin-bottom: 46px;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.case-grid p {
  margin: 0;
  color: #4f5d6d;
  line-height: 1.8;
}

.case-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 30px;
}

.case-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.case-dot {
  width: 34px;
  height: 5px;
  padding: 0;
  background: rgba(36, 98, 173, 0.2);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: width 0.2s ease, background 0.2s ease;
}

.case-dot.is-active {
  width: 64px;
  background: var(--accent);
}

.case-buttons {
  display: flex;
  align-items: center;
  gap: 10px;
}

.case-status {
  margin-right: 10px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.case-status strong {
  color: var(--accent);
  font-size: 17px;
}

.case-buttons button {
  display: grid;
  width: 46px;
  height: 46px;
  padding: 0;
  place-items: center;
  color: var(--accent);
  font-size: 22px;
  background: #fff;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 50%;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.case-buttons button:hover,
.case-buttons button:focus-visible {
  color: #fff;
  background: var(--accent);
  transform: translateY(-2px);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 86px;
}

.faq-aside {
  position: sticky;
  top: 40px;
  align-self: start;
}

.faq-aside h2 {
  margin-bottom: 20px;
}

.faq-aside p {
  color: var(--muted);
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  position: relative;
  padding: 26px 56px 26px 0;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::before,
.faq-item summary::after {
  position: absolute;
  top: 38px;
  right: 8px;
  width: 18px;
  height: 2px;
  background: var(--accent);
  content: "";
  transition: transform 0.2s ease;
}

.faq-item summary::after {
  transform: rotate(90deg);
}

.faq-item[open] summary::after {
  transform: rotate(0deg);
}

.faq-answer {
  max-width: 760px;
  padding: 0 56px 28px 0;
  color: var(--muted);
}

.faq-answer p {
  margin: 0;
}

.contact-cta {
  padding: 80px 0 46px;
}

.contact-panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 54px;
  overflow: hidden;
  padding: 58px 52px;
  color: #fff;
  background:
    radial-gradient(circle at 92% 8%, rgba(36, 98, 173, 0.32), transparent 40%),
    radial-gradient(circle at 0 100%, rgba(184, 137, 45, 0.13), transparent 38%),
    linear-gradient(135deg, #101f2b, #091219);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  box-shadow: 0 24px 80px rgba(5, 19, 32, 0.18);
}

.contact-copy {
  align-self: center;
}

.contact-eyebrow,
.contact-label,
.contact-modal-eyebrow {
  margin: 0 0 22px;
  color: #c69a43;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.contact-eyebrow::before,
.contact-modal-eyebrow::before {
  display: inline-block;
  width: 42px;
  height: 3px;
  margin: 0 20px 4px 0;
  background: #c69a43;
  border-radius: 999px;
  content: "";
}

.contact-copy h2 {
  max-width: 690px;
  margin: 0;
  font-size: clamp(38px, 4.6vw, 64px);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.contact-copy > p:last-child {
  max-width: 720px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.67);
  font-size: 17px;
  line-height: 1.9;
}

.contact-side {
  padding-left: 48px;
  border-left: 1px solid rgba(255, 255, 255, 0.17);
}

.contact-label {
  margin-bottom: 22px;
}

.contact-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.contact-tags span,
.contact-tags a {
  padding: 8px 14px;
  color: #6f99e2;
  border: 1px solid rgba(79, 124, 198, 0.48);
  border-radius: 10px;
}

.contact-tags a:hover,
.contact-tags a:focus-visible {
  color: #fff;
  border-color: rgba(111, 153, 226, 0.9);
}

.contact-button {
  min-width: 144px;
  padding: 14px 28px;
  color: #fff;
  font-weight: 800;
  background: #b8892d;
  border: 0;
  border-radius: 999px;
  box-shadow: 0 12px 34px rgba(184, 137, 45, 0.2);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.contact-button:hover,
.contact-button:focus-visible {
  background: #c99a3c;
  transform: translateY(-2px);
}

.contact-qr {
  display: flex;
  align-items: center;
  gap: 22px;
  margin: 34px 0 0;
}

.contact-qr img {
  width: 142px;
  height: 142px;
  padding: 8px;
  object-fit: contain;
  background: #fff;
  border-radius: 14px;
}

.contact-qr figcaption {
  color: rgba(255, 255, 255, 0.62);
  font-size: 15px;
}

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 22px;
}

.contact-modal[hidden] {
  display: none;
}

.contact-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 13, 22, 0.7);
  backdrop-filter: blur(8px);
}

.contact-modal-card {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: 42px;
  background: #f8faff;
  border: 1px solid rgba(12, 27, 42, 0.16);
  border-radius: 28px;
  box-shadow: 0 30px 100px rgba(2, 13, 24, 0.38);
  animation: contact-modal-in 0.24s ease both;
}

@keyframes contact-modal-in {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

.contact-modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 46px;
  height: 46px;
  color: #526071;
  font-size: 28px;
  line-height: 1;
  background: #eef1f6;
  border: 1px solid var(--line);
  border-radius: 14px;
  cursor: pointer;
}

.contact-modal-eyebrow {
  margin-bottom: 24px;
  color: var(--accent);
}

.contact-modal-eyebrow::before {
  background: #b8892d;
}

.contact-modal-card h2 {
  max-width: 470px;
  margin: 0;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.contact-modal-intro {
  margin: 20px 0 28px;
  color: var(--muted);
  line-height: 1.8;
}

.contact-modal-rows {
  display: grid;
  gap: 14px;
}

.contact-modal-row {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.contact-modal-row span {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.15em;
}

.contact-modal-row a {
  color: var(--ink);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.contact-modal-qr {
  display: grid;
  justify-items: center;
  gap: 18px;
  margin-top: 20px;
  padding: 26px;
  color: var(--muted);
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.contact-modal-qr img {
  width: min(280px, 100%);
  aspect-ratio: 1;
  object-fit: contain;
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  background: #04111e;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 30px;
}

.footer-row a:hover {
  color: #fff;
}

.preview-home {
  min-height: 100vh;
  padding: 80px 0;
  color: #fff;
  background: var(--navy);
}

.preview-home h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(48px, 8vw, 86px);
  line-height: 1.08;
}

.preview-home .lead {
  max-width: 700px;
  margin: 24px 0 60px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 18px;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.preview-card {
  min-height: 280px;
  padding: 34px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.preview-card:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.preview-card small {
  color: var(--accent-2);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.preview-card h2 {
  margin: 62px 0 12px;
  font-size: 30px;
}

.preview-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .top-nav {
    position: absolute;
    top: 76px;
    right: 24px;
    display: none;
    width: min(320px, calc(100vw - 48px));
    padding: 22px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(12, 27, 42, 0.1);
    border-radius: 18px;
    box-shadow: 0 20px 60px rgba(22, 58, 101, 0.16);
    backdrop-filter: blur(14px);
  }

  .top-nav.is-open {
    display: grid;
  }

  .top-nav a {
    color: #344255;
  }

  .top-nav .nav-cta {
    color: #fff;
    text-align: center;
  }

  .menu-toggle {
    display: block;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 160px;
    padding-bottom: 90px;
  }

  .hero-visual {
    min-height: 380px;
    max-width: 520px;
    width: 100%;
    margin: 0 auto;
  }

  .solution-nav-inner {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-nav a:nth-child(2) {
    border-right: 0;
  }

  .solution-nav a:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .section-head,
  .ai-head,
  .faq-layout,
  .case-hero,
  .bootcamp-head {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .bootcamp-path {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .case-mark {
    display: none;
  }

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

  .pain-grid,
  .phases {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .flow-step:nth-child(3)::after {
    display: none;
  }

  .faq-aside {
    position: static;
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }

  .contact-side {
    padding: 36px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.17);
    border-left: 0;
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(100% - 28px, var(--max));
  }

  .nav-row {
    height: 74px;
  }

  .brand img {
    width: 86px;
  }

  .brand-note {
    display: none;
  }

  .banner {
    min-height: auto;
  }

  .hero-grid {
    gap: 28px;
    padding-top: 132px;
    padding-bottom: 72px;
  }

  .tit-cn {
    font-size: clamp(40px, 14vw, 58px);
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-visual {
    min-height: 330px;
  }

  .node {
    font-size: 11px;
  }

  .node-a { left: 0; }
  .node-b { right: 0; }
  .node-c { right: 0; }
  .node-d { left: 0; }

  .core-mark {
    width: 108px;
    height: 108px;
    font-size: 22px;
  }

  .solution-nav {
    margin-top: -24px;
  }

  .solution-nav a {
    padding: 18px 16px;
  }

  .solution-nav strong {
    font-size: 14px;
  }

  .section {
    padding: 78px 0;
  }

  .bootcamp-section {
    padding: 76px 0;
  }

  .bootcamp-path {
    grid-template-columns: 1fr;
    margin-top: 38px;
  }

  .bootcamp-path article {
    min-height: 0;
  }

  .bootcamp-path span {
    margin-bottom: 28px;
  }

  .bootcamp-signals {
    grid-template-columns: repeat(2, 1fr);
  }

  .section-head {
    margin-bottom: 36px;
  }

  .pain-grid,
  .deliverables,
  .phases,
  .ai-grid,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  .pain-card {
    min-height: 0;
  }

  .pain-card .index {
    margin-bottom: 26px;
  }

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

  .flow-step:nth-child(3)::after {
    display: block;
  }

  .flow-step:nth-child(even)::after {
    display: none;
  }

  .ai-panel {
    padding: 32px 22px;
  }

  .principle-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .contact-cta {
    padding: 54px 0 30px;
  }

  .contact-panel {
    gap: 32px;
    padding: 38px 24px;
    border-radius: 22px;
  }

  .contact-copy h2 {
    font-size: clamp(34px, 11vw, 48px);
  }

  .contact-copy > p:last-child {
    margin-top: 22px;
    font-size: 15px;
  }

  .contact-side {
    padding-top: 30px;
  }

  .contact-tags {
    display: grid;
  }

  .contact-tags span,
  .contact-tags a {
    width: fit-content;
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .contact-qr {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-modal {
    padding: 12px;
  }

  .contact-modal-card {
    max-height: calc(100vh - 24px);
    padding: 34px 20px 24px;
    border-radius: 22px;
  }

  .contact-modal-close {
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
  }

  .case-label {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .case-hero {
    padding: 38px 0 32px;
  }

  .case-quote {
    font-size: 16px;
  }

  .case-viewport {
    min-height: 0;
  }

  .case-grid > div {
    min-height: 0;
    padding: 24px;
  }

  .case-grid small {
    margin-bottom: 18px;
  }

  .case-controls {
    align-items: flex-end;
    flex-direction: column-reverse;
  }

  .case-dots {
    align-self: stretch;
  }

  .case-dot {
    flex: 1;
  }

  .case-dot.is-active {
    flex: 1.8;
    width: auto;
  }

  .faq-item summary {
    padding-right: 42px;
    font-size: 17px;
  }

  .faq-answer {
    padding-right: 36px;
  }

  .footer-row {
    display: grid;
  }
}