:root {
  --bg: #060b14;
  --bg-2: #0a1220;
  --bg-3: #0e1830;
  --card: rgba(14, 24, 44, 0.82);
  --text: #e8eef8;
  --text-2: #9ab4ce;
  --muted: #6b809c;
  --line: rgba(56, 189, 248, 0.14);
  --line-strong: rgba(34, 211, 238, 0.35);
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --magenta: #f43f8c;
  --gold: #fbbf24;
  --header-h: 64px;
  --font: "Manrope", "Noto Sans SC", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 980px;
  --radius: 14px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

#techCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

.tech-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 40% at 20% 0%, rgba(34, 211, 238, 0.16), transparent 55%),
    radial-gradient(ellipse 40% 35% at 90% 15%, rgba(244, 63, 140, 0.1), transparent 50%),
    radial-gradient(ellipse 45% 30% at 60% 90%, rgba(59, 130, 246, 0.1), transparent 50%);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

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

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

button,
input,
textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

ol,
ul {
  list-style: none;
}

::selection {
  background: rgba(34, 211, 238, 0.28);
  color: #fff;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: rgba(6, 11, 20, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s;
}

.site-header.is-scrolled {
  background: rgba(6, 11, 20, 0.92);
  border-bottom-color: var(--line);
}

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

.brand-logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-zh {
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.brand-en {
  font-size: 8px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  transition: color 0.2s;
}

.nav a:hover,
.nav a.is-active {
  color: var(--cyan);
}

.nav-cta {
  padding: 8px 14px !important;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--cyan), var(--blue), var(--magenta)) !important;
  color: #fff !important;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.25s var(--ease);
}

.nav-toggle.is-open span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle.is-open span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.2s;
}

.btn-primary {
  background: linear-gradient(120deg, #06b6d4, #2563eb 55%, #db2777);
  color: #fff;
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.28);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(34, 211, 238, 0.4);
}

.btn-outline {
  border: 1px solid var(--line-strong);
  background: rgba(34, 211, 238, 0.06);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.12);
}

.btn-block {
  width: 100%;
}

/* Hero */
.hero {
  padding: calc(var(--header-h) + 56px) 20px 52px;
  text-align: center;
}

.hero-content {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.hero-eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid var(--line-strong);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
}

.hero-brand {
  font-size: clamp(2.6rem, 8vw, 3.8rem);
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.1;
  margin-bottom: 12px;
  background: linear-gradient(120deg, #fff 15%, var(--cyan) 45%, var(--blue) 70%, var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-2);
  margin-bottom: 8px;
  letter-spacing: 0.12em;
}

.hero-desc {
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.08em;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.section {
  padding: 48px 20px;
}

.section:nth-of-type(even) {
  background: linear-gradient(180deg, transparent, rgba(14, 24, 48, 0.55), transparent);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-head {
  margin-bottom: 22px;
}

.section-label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.3;
}

.section-lead {
  color: var(--text-2);
  font-size: 0.95rem;
  max-width: 640px;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.value-card,
.capability-card,
.solution-card,
.adv-card,
.process-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 14px;
  backdrop-filter: blur(10px);
  transition: transform 0.25s var(--ease), border-color 0.25s, box-shadow 0.25s;
}

.value-card:hover,
.capability-card:hover,
.solution-card:hover,
.adv-card:hover,
.process-list li:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.12);
}

.value-card h3,
.capability-card h3,
.solution-card h3,
.adv-card h3,
.process-list h3 {
  font-size: 0.98rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.value-card p,
.capability-card > p,
.solution-card p,
.adv-card p,
.process-list p {
  color: var(--text-2);
  font-size: 0.88rem;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.capability-card > p {
  margin-bottom: 10px;
}

.capability-card ul {
  display: grid;
  gap: 5px;
}

.capability-card li {
  position: relative;
  padding-left: 12px;
  font-size: 0.85rem;
  color: var(--text-2);
}

.capability-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #061018;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 10px;
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.4);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 12px;
}

.contact-info {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.contact-row {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-k {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 3px;
}

.contact-v {
  font-size: 0.92rem;
  font-weight: 600;
}

.contact-form {
  display: grid;
  gap: 12px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
}

.contact-form label {
  display: grid;
  gap: 6px;
}

.contact-form label span {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(6, 11, 20, 0.65);
  border: 1px solid var(--line);
  outline: none;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--muted);
}

.form-note {
  text-align: center;
  color: var(--cyan);
  font-size: 0.88rem;
}

/* Footer */
.site-footer {
  background: #04080f;
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 36px 16px 32px;
}

.footer-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  display: grid;
  gap: 6px;
  justify-items: center;
  font-size: 12px;
  line-height: 1.7;
}

.footer-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  margin-bottom: 2px;
}

.footer-name {
  color: var(--text);
  font-weight: 800;
  font-size: 14px;
}

.footer-beian {
  margin-top: 8px;
}

.beian-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-2);
  font-weight: 600;
}

.beian-link:hover {
  color: var(--cyan);
}

.beian-icon {
  width: 18px;
  height: 20px;
  object-fit: contain;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav.is-open {
    display: flex;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 8px 16px 16px;
    background: rgba(6, 11, 20, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open .nav-cta {
    margin-top: 10px;
    text-align: center;
  }

  .value-grid,
  .adv-grid,
  .process-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 560px) {
  .value-grid,
  .adv-grid,
  .process-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}