:root {
  --bg: #07110f;
  --bg-soft: #0d1c18;
  --panel: rgba(16, 35, 30, 0.78);
  --panel-solid: #10231e;
  --line: rgba(210, 225, 215, 0.14);
  --text: #eef5ef;
  --muted: #a9b8ae;
  --subtle: #7e9186;
  --green: #43c38d;
  --green-deep: #123f32;
  --cyan: #6ec4d8;
  --gold: #d6a85f;
  --warm: #f0dec0;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.36);
  --font: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 0%, rgba(67, 195, 141, 0.14), transparent 34rem),
    radial-gradient(circle at 82% 10%, rgba(214, 168, 95, 0.11), transparent 28rem),
    linear-gradient(180deg, #07110f 0%, #0b1513 48%, #07110f 100%);
  color: var(--text);
  font-family: var(--font);
  -webkit-tap-highlight-color: rgba(67, 195, 141, 0.22);
}

body {
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(238, 245, 239, 0.045) 1px, transparent 1px) 0 0 / 74px 74px,
    linear-gradient(0deg, rgba(238, 245, 239, 0.035) 1px, transparent 1px) 0 0 / 74px 74px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 88%);
  content: "";
}

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

button,
input,
select,
textarea {
  font: inherit;
}

button,
a,
input,
select,
textarea {
  touch-action: manipulation;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 14px;
  left: 14px;
  transform: translateY(-140%);
  padding: 10px 14px;
  background: var(--gold);
  color: #07110f;
  font-weight: 700;
  transition: transform 0.18s ease;
}

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

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1220px, calc(100vw - 44px));
  min-height: 86px;
  padding: 18px 0;
  transform: translateX(-50%);
  border-bottom: 0;
  background: linear-gradient(180deg, rgba(7, 17, 15, 0.62), rgba(7, 17, 15, 0.18) 74%, transparent);
  backdrop-filter: blur(8px);
  box-shadow: none;
}

.brand {
  display: flex;
  align-items: center;
  min-width: 360px;
}

.brand-copy strong,
.brand-copy em {
  display: block;
}

.brand-copy strong {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-copy em {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}

nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

nav a {
  position: relative;
  padding: 10px 0;
  color: rgba(238, 245, 239, 0.74);
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s ease;
}

nav a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--gold);
  content: "";
  transition: transform 0.2s ease;
}

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

nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

nav a:focus-visible,
.btn:focus-visible,
.brand:focus-visible,
.solution-tabs button:focus-visible,
.contact-form button:focus-visible {
  box-shadow: 0 0 0 4px rgba(214, 168, 95, 0.22);
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px max(22px, calc((100vw - 1220px) / 2)) 34px;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.95) contrast(1.04);
}

.hero-backdrop::after {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 17, 15, 0.96) 0%, rgba(7, 17, 15, 0.88) 34%, rgba(7, 17, 15, 0.46) 69%, rgba(7, 17, 15, 0.84) 100%),
    linear-gradient(0deg, #07110f 0%, rgba(7, 17, 15, 0.18) 36%, rgba(7, 17, 15, 0.42) 100%);
  content: "";
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(320px, 0.62fr);
  gap: 54px;
  align-items: center;
  min-height: calc(100vh - 260px);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 26px;
  font-size: clamp(44px, 6.8vw, 92px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.24;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 23px;
  line-height: 1.38;
}

.lead {
  max-width: 690px;
  color: #c8d6ce;
  font-size: 20px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid rgba(238, 245, 239, 0.22);
  font-size: 15px;
  font-weight: 700;
}

.btn.primary {
  border-color: rgba(67, 195, 141, 0.62);
  background: var(--green);
  color: #05100d;
}

.btn.secondary {
  background: rgba(238, 245, 239, 0.06);
  color: var(--text);
}

.hero-card {
  align-self: end;
  padding: 26px;
  border: 1px solid rgba(238, 245, 239, 0.16);
  background: rgba(11, 28, 24, 0.72);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.status {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 7px 10px;
  background: rgba(214, 168, 95, 0.12);
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

.hero-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 28px;
  line-height: 1.35;
}

.hero-card p {
  color: var(--muted);
  line-height: 1.75;
}

.card-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 22px;
  background: var(--line);
}

.card-metrics span {
  min-height: 86px;
  padding: 14px;
  background: rgba(7, 17, 15, 0.62);
  color: var(--muted);
  font-size: 13px;
}

.card-metrics b {
  display: block;
  margin-bottom: 6px;
  color: var(--warm);
  font-size: 27px;
  line-height: 1;
}

.hero-bottom {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 28px;
  border: 1px solid rgba(238, 245, 239, 0.15);
  background: rgba(238, 245, 239, 0.12);
  backdrop-filter: blur(14px);
}

.hero-bottom article {
  min-height: 174px;
  padding: 24px;
  background: rgba(8, 22, 18, 0.78);
}

.hero-bottom span,
.case-grid span {
  color: var(--gold);
  font-size: 28px;
  font-weight: 700;
}

.hero-bottom strong {
  display: block;
  margin: 12px 0 9px;
  font-size: 19px;
}

.hero-bottom p,
.about-main p,
.business-grid p,
.solution-panel p,
.case-grid p,
.contact p {
  color: var(--muted);
  line-height: 1.78;
}

.section,
.contact,
footer {
  width: min(1220px, calc(100vw - 32px));
  margin-inline: auto;
}

.section {
  padding-top: 112px;
  scroll-margin-top: 112px;
}

.section-head {
  display: block;
  max-width: 860px;
  margin-bottom: 38px;
}

.section-head .eyebrow {
  margin-bottom: 12px;
}

.section-head h2 {
  max-width: 820px;
  text-wrap: balance;
}

.section-head.narrow {
  max-width: 720px;
}

.section-head.narrow h2 {
  max-width: 700px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
}

.about-main,
.culture,
.business-grid article,
.solution-shell,
.case-grid article,
.contact {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.22);
}

.about-main {
  padding: 32px;
  font-size: 17px;
}

.about-main p:last-child {
  margin-bottom: 0;
}

.culture {
  display: grid;
}

.culture article {
  padding: 26px;
  border-bottom: 1px solid var(--line);
}

.culture article:last-child {
  border-bottom: 0;
}

.culture span,
.business-grid small,
.solution-panel span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

.culture strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
  line-height: 1.5;
}

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

.business-grid article {
  min-height: 330px;
  padding: 28px;
  background:
    linear-gradient(150deg, rgba(67, 195, 141, 0.08), transparent 46%),
    rgba(16, 35, 30, 0.78);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.business-grid article:hover {
  transform: translateY(-7px);
  border-color: rgba(67, 195, 141, 0.38);
}

.business-grid small {
  display: inline-flex;
  margin-bottom: 24px;
  padding: 6px 10px;
  background: rgba(214, 168, 95, 0.11);
}

.solution-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  min-height: 440px;
  overflow: hidden;
}

.solution-tabs {
  display: grid;
  border-right: 1px solid var(--line);
}

.solution-tabs button {
  border: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 15, 0.22);
  color: #d3dfd8;
  cursor: pointer;
  font-size: 18px;
  font-weight: 700;
  text-align: left;
  padding: 26px;
}

.solution-tabs button:last-child {
  border-bottom: 0;
}

.solution-tabs button.active {
  background: linear-gradient(135deg, rgba(67, 195, 141, 0.28), rgba(214, 168, 95, 0.12));
  color: var(--text);
}

.solution-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px;
  background:
    radial-gradient(circle at 82% 14%, rgba(110, 196, 216, 0.14), transparent 24rem),
    radial-gradient(circle at 70% 82%, rgba(214, 168, 95, 0.12), transparent 22rem);
}

.solution-panel h3 {
  margin: 16px 0;
  font-size: clamp(30px, 4vw, 52px);
}

.solution-panel p {
  max-width: 780px;
  font-size: 18px;
}

.solution-panel ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.solution-panel li {
  padding: 9px 13px;
  border: 1px solid rgba(67, 195, 141, 0.24);
  background: rgba(67, 195, 141, 0.09);
  color: #d9f8e9;
  font-weight: 700;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.case-grid article {
  min-height: 250px;
  padding: 28px;
}

.contact {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 40px;
  align-items: start;
  margin-top: 28px;
  padding: 40px;
  background:
    linear-gradient(135deg, rgba(18, 63, 50, 0.94), rgba(14, 31, 27, 0.92)),
    var(--panel-solid);
}

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

.contact-form label {
  display: grid;
  gap: 8px;
}

.contact-form span {
  color: #dbe9e0;
  font-size: 13px;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(238, 245, 239, 0.16);
  background: rgba(7, 17, 15, 0.42);
  color: var(--text);
  padding: 13px 14px;
  caret-color: var(--gold);
}

.contact-form option {
  color: #07110f;
}

.contact-form textarea {
  min-height: 112px;
  resize: vertical;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(238, 245, 239, 0.45);
}

.contact-form button {
  min-height: 48px;
  border: 0;
  background: var(--gold);
  color: #0b1513;
  cursor: pointer;
  font-weight: 800;
}

.contact-form button:disabled,
.captcha-actions button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: #dbe9e0;
  font-size: 14px;
  line-height: 1.7;
}

.form-status.is-error {
  padding: 10px 12px;
  border: 1px solid rgba(255, 180, 168, 0.28);
  background: rgba(255, 180, 168, 0.1);
  color: #ffb4a8;
}

.form-status.is-success {
  padding: 12px 14px;
  border: 1px solid rgba(67, 195, 141, 0.36);
  background: rgba(67, 195, 141, 0.14);
  color: #b8f2d3;
  font-weight: 700;
}

.contact-form input:focus-visible,
.contact-form select:focus-visible,
.contact-form textarea:focus-visible {
  border-color: rgba(214, 168, 95, 0.62);
  box-shadow: 0 0 0 4px rgba(214, 168, 95, 0.16);
}

.captcha-dialog {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(3, 9, 8, 0.72);
  backdrop-filter: blur(16px);
}

.captcha-dialog[hidden] {
  display: none;
}

.captcha-card {
  position: relative;
  width: min(520px, 100%);
  padding: 30px;
  border: 1px solid rgba(238, 245, 239, 0.18);
  background:
    linear-gradient(145deg, rgba(18, 63, 50, 0.96), rgba(11, 28, 24, 0.98)),
    var(--panel-solid);
  box-shadow: var(--shadow);
}

.captcha-card h2 {
  margin-bottom: 12px;
  font-size: 30px;
}

.captcha-question {
  margin-bottom: 20px;
  color: var(--text);
  font-size: 24px;
  font-weight: 800;
}

.captcha-card label {
  display: grid;
  gap: 8px;
}

.captcha-card label span {
  color: #dbe9e0;
  font-size: 13px;
  font-weight: 700;
}

.captcha-card input {
  width: 100%;
  border: 1px solid rgba(238, 245, 239, 0.18);
  background: rgba(7, 17, 15, 0.48);
  color: var(--text);
  padding: 13px 14px;
}

.captcha-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(238, 245, 239, 0.16);
  background: rgba(238, 245, 239, 0.06);
  color: var(--text);
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
}

.captcha-actions {
  display: flex;
  gap: 12px;
  margin: 18px 0 12px;
}

.captcha-actions button {
  min-height: 44px;
  border: 1px solid rgba(238, 245, 239, 0.16);
  cursor: pointer;
  font-weight: 800;
  padding: 0 16px;
}

.captcha-actions button:first-child {
  background: rgba(238, 245, 239, 0.06);
  color: var(--text);
}

.captcha-actions button:last-child {
  border-color: var(--gold);
  background: var(--gold);
  color: #0b1513;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 34px 0 46px;
  color: var(--subtle);
  font-size: 14px;
}

footer p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@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;
  }

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

@media (max-width: 980px) {
  .site-header {
    position: sticky;
    top: 0;
    width: 100%;
    transform: none;
    left: auto;
    margin: 0;
    padding: 14px 16px;
    border-width: 0;
    background: rgba(7, 17, 15, 0.86);
    backdrop-filter: blur(14px);
  }

  .brand {
    min-width: 0;
  }

  nav {
    display: none;
  }

  .hero {
    padding-top: 78px;
  }

  .hero-inner,
  .about-grid,
  .solution-shell,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    gap: 28px;
  }

  .hero-card {
    align-self: auto;
  }

  .hero-bottom,
  .business-grid,
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-tabs {
    grid-template-columns: repeat(4, 1fr);
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .solution-tabs button {
    padding: 18px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    font-size: 16px;
  }
}

@media (max-width: 640px) {
  .section,
  .contact,
  footer {
    width: calc(100vw - 24px);
  }

  .brand-copy strong {
    font-size: 14px;
  }

  .brand-copy em {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 17px;
  }

  .hero {
    padding-inline: 12px;
  }

  .hero-bottom,
  .business-grid,
  .case-grid,
  .solution-tabs,
  .card-metrics {
    grid-template-columns: 1fr;
  }

  .solution-tabs button {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .about-main,
  .solution-panel,
  .contact {
    padding: 24px;
  }

  footer {
    display: block;
  }

  footer p + p {
    margin-top: 8px;
  }
}