/* ===================== Design Tokens ===================== */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fb;
  --color-bg-dark: #0e2a47;
  --color-bg-darker: #0a1f35;
  --color-text: #1a2740;
  --color-text-muted: #5b6a82;
  --color-text-on-dark: #e9eef7;
  --color-text-on-dark-muted: #9fb2cb;
  --color-primary: #1e6fd9;
  --color-primary-dark: #155bb5;
  --color-accent: #c9a35a;
  --color-accent-dark: #a8853f;
  --color-border: #e3e8f0;
  --color-border-dark: #1c3a5e;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(14, 42, 71, 0.06);
  --shadow-md: 0 8px 24px rgba(14, 42, 71, 0.08);
  --shadow-lg: 0 16px 48px rgba(14, 42, 71, 0.12);

  --font-sans: 'Inter', 'Noto Sans HK', 'PingFang HK', 'Microsoft JhengHei', sans-serif;
  --container: 1200px;

  --transition: 0.25s ease;
}

/* ===================== Reset ===================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul, ol { padding-left: 1.2em; }
h1, h2, h3, h4 { color: var(--color-text); font-weight: 700; line-height: 1.3; margin: 0 0 0.6em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.btn-outline-light:hover { background: #fff; color: var(--color-bg-dark); }
.btn-gold { background: var(--color-accent); color: #fff; }
.btn-gold:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); }

/* ===================== Header ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  font-weight: 700;
}
.brand:hover { color: var(--color-text); }
.brand-logo {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-logo svg { width: 100%; height: 100%; display: block; }
.site-footer .brand-logo .stem { fill: #fff; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-zh { font-size: 1rem; }
.brand-en { font-size: 0.72rem; color: var(--color-text-muted); font-weight: 500; letter-spacing: 0.02em; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav a:hover { background: var(--color-bg-alt); color: var(--color-primary); }
.nav a.active { color: var(--color-primary); }

.header-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch {
  display: flex;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--color-border);
}
.lang-switch button {
  background: transparent;
  border: none;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text-muted);
  border-radius: 4px;
  transition: all var(--transition);
}
.lang-switch button.active { background: #fff; color: var(--color-text); box-shadow: var(--shadow-sm); }

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 40px; height: 40px;
  cursor: pointer;
  align-items: center; justify-content: center;
}
.menu-toggle span {
  display: block; width: 18px; height: 2px; background: var(--color-text);
  position: relative;
}
.menu-toggle span::before,
.menu-toggle span::after {
  content: ''; position: absolute; left: 0; width: 18px; height: 2px; background: var(--color-text);
}
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

/* ===================== Hero ===================== */
.hero {
  position: relative;
  background:
    radial-gradient(circle at 80% 20%, rgba(30, 111, 217, 0.18), transparent 50%),
    radial-gradient(circle at 20% 80%, rgba(201, 163, 90, 0.10), transparent 50%),
    linear-gradient(180deg, #0a1f35 0%, #0e2a47 60%, #0e2a47 100%);
  color: var(--color-text-on-dark);
  padding: 96px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(201, 163, 90, 0.12);
  border: 1px solid rgba(201, 163, 90, 0.4);
  border-radius: 999px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero h1 { color: #fff; margin-bottom: 24px; }
.hero h1 .accent { color: var(--color-accent); }
.hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-on-dark-muted);
  margin-bottom: 36px;
  max-width: 640px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 72px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat .num { font-size: 1.6rem; font-weight: 700; color: var(--color-accent); }
.hero-stat .label { font-size: 0.9rem; color: var(--color-text-on-dark-muted); }

/* ===================== Sections ===================== */
.section { padding: 96px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: var(--color-text-on-dark); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head p { color: var(--color-text-muted); font-size: 1.05rem; }

/* ===================== Cards Grid ===================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
}
.card:hover { border-color: var(--color-primary); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-dark) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 12px; }
.card p { color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }

/* ===================== Why Us ===================== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}
.why-item { display: flex; gap: 16px; align-items: flex-start; }
.why-item .num {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.why-item h3 { font-size: 1.1rem; margin-bottom: 6px; }
.why-item p { color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }

/* ===================== CTA Banner ===================== */
.cta-banner {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #122e54 50%, #1a4378 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 32px;
}
.cta-banner h2 { color: #fff; margin: 0 0 8px; }
.cta-banner p { color: var(--color-text-on-dark-muted); margin: 0; }

/* ===================== About ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.about-mvv {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.mvv-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  border-top: 3px solid var(--color-accent);
}
.mvv-card h3 { font-size: 1.05rem; color: var(--color-primary); margin-bottom: 10px; }
.mvv-card p { color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }

.credentials {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-top: 48px;
}
.credentials h3 { margin-bottom: 18px; }
.credentials ul { list-style: none; padding: 0; margin: 0; }
.credentials li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.credentials li:last-child { border-bottom: none; }
.credentials li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===================== Service Detail Blocks ===================== */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--color-border);
}
.service-block:last-child { border-bottom: none; }
.service-block.reverse > div:first-child { order: 2; }
.service-block .visual {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-dark) 100%);
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.9);
  position: relative;
  overflow: hidden;
}
.service-block .visual::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.service-block .visual svg { width: 90px; height: 90px; position: relative; z-index: 1; opacity: 0.85; }
.service-block .meta { color: var(--color-primary); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; }
.service-block h2 { margin-bottom: 18px; }
.service-block .lead { color: var(--color-text-muted); font-size: 1.05rem; margin-bottom: 22px; }
.service-block ul { list-style: none; padding: 0; margin: 0; }
.service-block li {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 8px 0;
  color: var(--color-text);
  font-size: 0.97rem;
}
.service-block li::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-accent);
  margin-top: 11px;
  flex-shrink: 0;
}

/* ===================== Solutions Industries ===================== */
.industries {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.industry {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}
.industry:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.industry .tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(201, 163, 90, 0.12);
  color: var(--color-accent-dark);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.industry h3 { margin-bottom: 10px; }
.industry p { color: var(--color-text-muted); font-size: 0.95rem; margin-bottom: 18px; }
.industry ul { list-style: none; padding: 0; margin: 0; font-size: 0.9rem; color: var(--color-text); }
.industry li { padding: 4px 0; padding-left: 18px; position: relative; }
.industry li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--color-primary);
}

/* ===================== Process ===================== */
.process {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  margin-top: 16px;
}
.process-step {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
}
.process-step .step-num {
  display: inline-block;
  width: 44px; height: 44px; line-height: 44px;
  border-radius: 50%;
  background: var(--color-bg-dark);
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 14px;
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 6px; }
.process-step p { color: var(--color-text-muted); font-size: 0.9rem; margin: 0; }

/* ===================== Contact ===================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}
.contact-info {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.contact-info h2 { color: #fff; margin-bottom: 8px; }
.contact-info .lead { color: var(--color-text-on-dark-muted); margin-bottom: 32px; }
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border-dark);
}
.contact-item:last-of-type { border-bottom: none; }
.contact-item .icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-accent);
}
.contact-item .icon svg { width: 20px; height: 20px; }
.contact-item .label { font-size: 0.8rem; color: var(--color-text-on-dark-muted); margin-bottom: 2px; }
.contact-item .value { color: #fff; font-weight: 500; font-size: 0.97rem; }
.contact-item .value a { color: #fff; }
.contact-item .value a:hover { color: var(--color-accent); }

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}
.form-field label .req { color: #d04545; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.12);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 14px; }

.map-wrap {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  height: 380px;
}
.map-wrap iframe { width: 100%; height: 100%; border: 0; }

/* ===================== Page Header (inner pages) ===================== */
.page-header {
  background: linear-gradient(135deg, var(--color-bg-darker) 0%, var(--color-bg-dark) 100%);
  color: #fff;
  padding: 80px 0 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.page-header > .container { position: relative; z-index: 1; }
.page-header h1 { color: #fff; margin-bottom: 12px; }
.page-header p { color: var(--color-text-on-dark-muted); font-size: 1.05rem; max-width: 640px; margin: 0 auto; }

/* ===================== Footer ===================== */
.site-footer {
  background: var(--color-bg-darker);
  color: var(--color-text-on-dark-muted);
  padding: 64px 0 28px;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand .brand-zh { font-size: 1.1rem; }
.footer-brand p { color: var(--color-text-on-dark-muted); font-size: 0.92rem; margin: 0; }
.footer-col h4 {
  color: #fff;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--color-text-on-dark-muted); }
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid var(--color-border-dark);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--color-text-on-dark-muted);
}

/* ===================== Responsive ===================== */
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .service-block { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .service-block.reverse > div:first-child { order: 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cta-banner { flex-direction: column; align-items: flex-start; padding: 40px; }
}
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .hero { padding: 72px 0 80px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px 16px; }
  .menu-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; border-radius: var(--radius-sm); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 32px; }
  .contact-info, .contact-form { padding: 28px; }
  .brand-en { display: none; }
  .site-header .brand-text { display: none; }
}