:root {
  --bg: #f6f8f5;
  --surface: #ffffff;
  --surface-strong: #edf5f0;
  --ink: #102022;
  --muted: #5c6b6e;
  --line: #dce6e1;
  --teal: #0b8f81;
  --teal-dark: #07534e;
  --green: #069dec;
  --amber: #d8942f;
  --coral: #c75f48;
  --hero-ink: #f5fffb;
  --shadow: 0 18px 42px rgba(16, 32, 34, 0.12);
  --header-height: 76px;
  --font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  font-family: var(--font-family);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-family);
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-140%);
  border-radius: 6px;
  background: var(--ink);
  color: #ffffff;
  padding: 10px 14px;
  transition: transform 0.2s ease;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--header-height);
  background: rgba(246, 248, 245, 0.9);
  border-bottom: 1px solid rgba(220, 230, 225, 0.82);
  backdrop-filter: blur(14px);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 28px rgba(16, 32, 34, 0.08);
}

.nav {
  width: min(1220px, calc(100% - 40px));
  min-height: var(--header-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img{ height: 42px;}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--teal), var(--green));
  color: #ffffff;
  font-weight: 800;
  font-size: 14px;
}

.brand-text {
  display: grid;
  gap: 1px;
}

.brand-text strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand-text small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.2;
}

.nav-menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 26px;
  color: #263b3d;
  font-size: 15px;
}

.nav-menu a {
  position: relative;
  padding: 26px 0;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 18px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--teal);
  transition: transform 0.2s ease;
}

.nav-menu a:hover::after,
.nav-menu a:focus-visible::after {
  transform: scaleX(1);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 6px;
  font-weight: 700;
}

.nav-cta {
  flex: 0 0 auto;
  padding: 0 18px;
  background: var(--ink);
  color: #ffffff;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero {
  position: relative;
  min-height: clamp(560px, calc(100svh - 132px), 760px);
  overflow: hidden;
  isolation: isolate;
  color: var(--hero-ink);
}

.hero-media,
.hero-media img,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  z-index: -1;
  background: rgba(4, 15, 17, 0.2);
}

.hero-media {
  z-index: -2;
  background: #071214;
}

.hero-content {
  min-height: inherit;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 58px 0 48px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--green);
  font-weight: 800;
  font-size: 14px;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  color: #ffffff;
  font-size: 64px;
  line-height: 1.08;
  font-weight: 800;
}

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

.hero-intro {
  max-width: 680px;
  margin: 24px 0 0;
  color: rgba(245, 255, 251, 0.86);
  font-size: 20px;
}

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

.button {
  padding: 0 22px;
  border: 1px solid transparent;
  font-size: 15px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.button-primary {
  background: #ffffff;
  color: var(--teal-dark);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  width: min(720px, 100%);
  margin: 44px 0 0;
}

.hero-metrics div {
  min-height: 96px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  padding: 18px;
  background: rgba(3, 21, 22, 0.45);
}

.hero-metrics dt {
  color: #ffffff;
  font-weight: 800;
  font-size: 18px;
}

.hero-metrics dd {
  margin: 6px 0 0;
  color: rgba(245, 255, 251, 0.72);
  font-size: 13px;
}

.section {
  padding: 92px 0;
}

.section-intro {
  padding-top: 64px;
  background: #ffffff;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 70px;
  align-items: start;
}

h2,
h3,
p {
  margin-top: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 40px;
  line-height: 1.18;
}

h3 {
  font-size: 22px;
  line-height: 1.28;
}

.lead-text {
  color: var(--muted);
  font-size: 18px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.solution-card,
.scenario-grid article,
.capability-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(16, 32, 34, 0.06);
}

.solution-card {
  min-height: 420px;
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.card-index {
  width: 46px;
  height: 32px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 28px;
  border-radius: 6px;
  background: var(--surface-strong);
  color: var(--teal-dark);
  font-weight: 800;
}

.solution-card h3 {
  margin-bottom: 16px;
}

.solution-card p,
.scenario-grid p,
.capability-grid p {
  color: var(--muted);
}

.solution-card ul {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  color: #294447;
}

.solution-card li {
  position: relative;
  padding-left: 18px;
}

.solution-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
}

.section-band {
  background: #102022;
  color: #effbf7;
}

.section-heading-light p:last-child {
  color: rgba(239, 251, 247, 0.72);
}

.architecture {
  display: grid;
  grid-template-columns: 1fr 28px 1fr 28px 1fr 28px 1fr 28px 1fr;
  align-items: center;
  gap: 8px;
  margin: 38px 0 24px;
}

.arch-node {
  min-height: 116px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.06);
}

.arch-node span {
  display: block;
  margin-bottom: 10px;
  color: #069dec;
  font-weight: 800;
}

.arch-node strong {
  font-size: 15px;
  line-height: 1.5;
}

.arch-link {
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--amber));
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.capability-grid article {
  min-height: 220px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: process;
}

.process-list li {
  min-height: 280px;
  border-top: 4px solid var(--teal);
  padding: 24px 22px 22px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(16, 32, 34, 0.06);
}

.process-list li:nth-child(2) {
  border-color: var(--green);
}

.process-list li:nth-child(3) {
  border-color: var(--amber);
}

.process-list li:nth-child(4) {
  border-color: var(--coral);
}

.process-list span {
  display: block;
  margin-bottom: 34px;
  color: var(--muted);
  font-weight: 800;
}

.process-list h3 {
  margin-bottom: 12px;
}

.process-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-muted {
  background: #edf3ef;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.scenario-grid article {
  min-height: 240px;
  padding: 26px 24px;
}

.scenario-grid article::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 28px;
  border-radius: 4px;
  background: var(--teal);
}

.scenario-grid article:nth-child(2)::before {
  background: var(--green);
}

.scenario-grid article:nth-child(3)::before {
  background: var(--amber);
}

.scenario-grid article:nth-child(4)::before {
  background: var(--coral);
}

.proof-section {
  background: #ffffff;
}

.proof-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 72px;
  align-items: center;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.proof-grid div {
  min-height: 150px;
  border-left: 4px solid var(--teal);
  padding: 22px;
  background: #f7faf8;
}

.proof-grid div:nth-child(2) {
  border-color: var(--green);
}

.proof-grid div:nth-child(3) {
  border-color: var(--amber);
}

.proof-grid div:nth-child(4) {
  border-color: var(--coral);
}

.proof-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

.proof-grid span {
  color: var(--muted);
}

.contact-section {
  background: #102022;
  color: #effbf7;
}

.contact-section .lead-text {
  color: rgba(239, 251, 247, 0.76);
}

.contact-card {
  display: grid;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  padding: 32px;
  background: rgba(255, 255, 255, 0.06);
  font-style: normal;
}

.contact-card span {
  color: #069dec;
  font-weight: 800;
}

.contact-card strong {
  margin-bottom: 18px;
  font-size: 20px;
  line-height: 1.5;
}

.contact-card strong:last-child {
  margin-bottom: 0;
}

.site-footer {
  background: #071214;
  color: rgba(239, 251, 247, 0.7);
  font-size: 14px;
}

.footer-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

@media (max-width: 1040px) {
  .nav-menu {
    gap: 18px;
  }

  .hero h1 {
    max-width: 680px;
    font-size: 50px;
  }

  .solution-grid,
  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .arch-link {
    width: 2px;
    height: 22px;
    justify-self: center;
    background: linear-gradient(180deg, var(--green), var(--amber));
  }

  .capability-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 64px;
  }

  .container,
  .nav {
    width: min(100% - 28px, 1160px);
  }

  .brand-text small {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    inset: var(--header-height) 14px auto;
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--shadow);
    transform: translateY(-14px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu a {
    padding: 14px 12px;
    border-radius: 6px;
  }

  .nav-menu a::after {
    display: none;
  }

  .nav-menu a:hover,
  .nav-menu a:focus-visible {
    background: var(--surface-strong);
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .hero {
    min-height: clamp(560px, calc(100svh - 112px), 680px);
  }

  .hero-media img {
    object-position: 58% center;
  }

  .hero-content {
    padding: 44px 0 38px;
  }

  .hero h1 {
    font-size: 36px;
  }

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

  .hero-actions {
    margin-top: 26px;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .hero-metrics div {
    min-height: 78px;
    padding: 14px 16px;
  }

  .section {
    padding: 66px 0;
  }

  .section-intro {
    padding-top: 48px;
  }

  .split-layout,
  .proof-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  h2 {
    font-size: 30px;
  }

  .lead-text {
    font-size: 16px;
  }

  .solution-grid,
  .capability-grid,
  .process-list,
  .scenario-grid,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .solution-card,
  .process-list li,
  .scenario-grid article,
  .capability-grid article {
    min-height: auto;
  }

  .footer-inner {
    min-height: 88px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-text strong {
    font-size: 16px;
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding: 42px 0 34px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-intro {
    margin-top: 18px;
    font-size: 16px;
  }

  .button {
    width: 100%;
  }

  .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 22px;
  }

  .hero-metrics div {
    min-height: 56px;
    padding: 12px 8px;
    text-align: center;
  }

  .hero-metrics dt {
    font-size: 15px;
  }

  .hero-metrics dd {
    display: none;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .contact-card {
    padding: 24px;
  }

  .contact-card strong {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}