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

:root {
  --blue: #1a4fa0;
  --blue-dark: #0d1f4a;
  --blue-mid: #0f2355;
  --gold: #e8a020;
  --white: #ffffff;
  --text: #1a2340;
  --text-muted: #4a5670;
  --text-light: #8a96b0;
  --border: #e8ecf4;
  --bg-light: #f7f9fd;
  --bg-blue-light: #f0f5fc;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

/* ── NAV ── */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px; height: 68px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  gap: 16px;
}
.logo {
  height: 38px;
}
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-letters { display: flex; }
.logo-c, .logo-n { font-size: 28px; font-weight: 700; color: var(--gold); font-family: 'Noto Serif SC', serif; line-height: 1; }
.logo-a { font-size: 28px; font-weight: 700; color: var(--blue); font-family: 'Noto Serif SC', serif; line-height: 1; }
.logo-text { display: flex; flex-direction: column; gap: 1px; }
.logo-tagline { font-size: 13px; font-weight: 500; color: var(--text); letter-spacing: 0.02em; }
.logo-sub { font-size: 9px; color: var(--text-light); letter-spacing: 0.06em; text-transform: uppercase; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  font-size: 13px; color: var(--text-muted); text-decoration: none;
  letter-spacing: 0.02em; padding: 4px 0;
  border-bottom: 2px solid transparent; transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--blue); border-bottom-color: var(--blue); }
.nav-btn {
  padding: 9px 22px; background: var(--blue); color: var(--white);
  border: none; border-radius: 4px; font-size: 13px;
  font-family: 'Noto Sans SC', sans-serif; font-weight: 500;
  cursor: pointer; letter-spacing: 0.04em; transition: background 0.2s;
  text-decoration: none; display: inline-block;
}
.nav-btn:hover { background: #1556b8; }

/* Nav drawer: desktop = inline bar */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  color: var(--blue-dark);
  flex-shrink: 0;
}
.nav-toggle:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(7, 15, 36, 0.45);
  backdrop-filter: blur(2px);
}

@media (min-width: 901px) {
  .nav-backdrop {
    display: none !important;
    pointer-events: none;
  }
}

.nav-drawer {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-btn-drawer {
  flex-shrink: 0;
}

body.nav-no-scroll {
  overflow: hidden;
}

.btn-primary {
  padding: 12px 28px; background: var(--blue); color: var(--white);
  border: none; border-radius: 4px; font-size: 14px; font-weight: 500;
  font-family: 'Noto Sans SC', sans-serif; cursor: pointer;
  letter-spacing: 0.04em; transition: background 0.2s; text-decoration: none;
}
.btn-primary:hover { background: #1556b8; }
.btn-ghost {
  padding: 12px 28px; background: transparent; color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.5); border-radius: 4px;
  font-size: 14px; font-weight: 400; font-family: 'Noto Sans SC', sans-serif;
  cursor: pointer; letter-spacing: 0.04em; transition: all 0.2s; text-decoration: none;
}
.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.1); }
.container {
width: min(1200px, 92%);
margin: 0 auto;
}

.hero {
position: relative;
padding: 92px 0 110px;
color: #fff;
background-color: #10234b;
background-image: url("../image/banner.png");
background-position: center;
background-size: cover;
background-repeat: no-repeat;
overflow: hidden;
}

.hero::before {
content: "";
position: absolute;
inset: -20% -10% auto auto;
width: 680px;
height: 680px;
background: radial-gradient(circle, rgba(255, 255, 255, 0.25), transparent 60%);
}

.hero-mask {
position: absolute;
inset: 0;
background: linear-gradient(90deg, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.15));
}

.hero-content {
position: relative;
max-width: 1200px;
}

.hero-subtitle {
margin: 0 0 12px;
font-size: 13px;
letter-spacing: 0.08em;
opacity: 0.9;
}

h1 {
margin: 0;
font-size: clamp(34px, 5vw, 58px);
line-height: 1.2;
}

.tag-row {
display: flex;
flex-wrap: wrap;
gap: 14px;
margin: 24px 0 18px;
font-size: 20px;
font-weight: 600;
}

.hero-desc {
margin: 0;
max-width: 680px;
font-size: 17px;
opacity: 0.92;
}

.hero-actions {
display: flex;
gap: 14px;
margin-top: 30px;
}

.btn {
padding: 12px 24px;
border-radius: 10px;
font-size: 15px;
font-weight: 600;
}

.btn.primary {
color: #fff;
background: #0b5ad8;
}

.btn.secondary {
color: #17315c;
background: #fff;
}

.services-panel {
background: #05255a;
border-top: 1px solid rgba(255, 255, 255, 0.08);
border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

h2 {
margin: 0 0 24px;
color: #132a4f;
font-size: clamp(26px, 4vw, 36px);
}

.service-grid {
display: grid;
grid-template-columns: repeat(5, minmax(0, 1fr));
}

.service-card {
position: relative;
min-height: 140px;
padding: 26px 20px 24px;
display: flex;
align-items: center;
gap: 12px;
color: #f2f6ff;
}

.service-content {
min-width: 0;
}

.service-card h3 {
margin: 0 0 8px;
color: #ffffff;
font-size: 16px;
line-height: 1.35;
}

.service-card p {
margin: 0;
color: rgba(234, 241, 255, 0.88);
font-size: 13px;
line-height: 1.6;
}

.service-card:not(:last-child)::after {
content: "";
position: absolute;
top: 24px;
right: 0;
width: 1px;
height: calc(100% - 48px);
background: rgba(255, 255, 255, 0.14);
}

.service-icon {
width: 42px;
height: 42px;
flex: 0 0 42px;
border-radius: 50%;
display: inline-flex;
align-items: center;
justify-content: center;
border: 1px solid rgba(244, 193, 86, 0.6);
background: rgba(6, 51, 111, 0.65);
}

.service-icon svg {
width: 24px;
height: 24px;
}

.service-icon path {
stroke: #f0be58;
stroke-width: 1.6;
fill: none;
stroke-linecap: round;
stroke-linejoin: round;
}


/* ── ABOUT ── */
.about { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--border); }
.about-left { padding: 64px 48px; background: var(--bg-light); border-right: 1px solid var(--border); }
.about-right { padding: 64px 48px; background: var(--white); }
.sec-label {
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--blue); margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.sec-label::before { content: ''; width: 20px; height: 1.5px; background: var(--blue); }
.sec-h2 {
  font-family: 'Noto Serif SC', serif; font-size: 26px; font-weight: 700;
  color: var(--blue-dark); line-height: 1.35; margin-bottom: 18px;
}
.sec-p { font-size: 13px; color: var(--text-muted); line-height: 1.85; font-weight: 300; margin-bottom: 16px; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.stat-card { padding: 18px 20px; background: var(--white); border: 1px solid var(--border); border-radius: 8px; }
.stat-num { font-family: 'Noto Serif SC', serif; font-size: 26px; font-weight: 700; color: var(--blue); margin-bottom: 4px; }
.stat-lbl { font-size: 11px; color: var(--text-light); letter-spacing: 0.03em; }
.promise-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 20px; background: var(--bg-light); border-radius: 8px; margin-bottom: 14px;
}
.promise-item:last-child { margin-bottom: 0; }
.promise-item .ti { font-size: 17px; margin-top: 1px; }
.promise-title { font-size: 13px; font-weight: 500; color: var(--blue-dark); margin-bottom: 4px; }
.promise-desc { font-size: 12px; color: #6a7a9a; font-weight: 300; line-height: 1.6; }

/* ── SERVICES ── */
.services { padding: 64px 48px; background: var(--white); }
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.svc-card {
  border: 1px solid var(--border); border-radius: 10px; padding: 32px 28px;
  transition: all 0.25s; position: relative; overflow: hidden;
}
.svc-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(to right, var(--blue), #3a7abf);
  transform: scaleX(0); transition: transform 0.3s; transform-origin: left;
}
.svc-card:hover { border-color: #b8ccec; box-shadow: 0 4px 20px rgba(26,79,160,0.08); }
.svc-card:hover::before { transform: scaleX(1); }
.svc-icon {
  width: 48px; height: 48px; background: #eef3fb; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue); font-size: 22px; margin-bottom: 20px;
}
.svc-title { font-size: 16px; font-weight: 500; color: var(--blue-dark); margin-bottom: 10px; }
.svc-desc { font-size: 12px; color: #6a7a9a; line-height: 1.75; font-weight: 300; margin-bottom: 18px; }
.svc-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.svc-list li {
  font-size: 12px; color: var(--text-muted);
  display: flex; align-items: flex-start; gap: 8px; line-height: 1.5;
}
.svc-list li::before {
  content: ''; width: 4px; height: 4px; background: var(--gold);
  border-radius: 50%; margin-top: 5px; flex-shrink: 0;
}

/* ── WHY ── */
.why { background: var(--bg-blue-light); padding: 64px 48px; border-top: 1px solid #dce6f4; border-bottom: 1px solid #dce6f4; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 44px; }
.why-card { background: var(--white); border-radius: 10px; padding: 28px 24px; border: 1px solid #e0e8f4; }
.why-icon {
  width: 40px; height: 40px; background: #eef3fb; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue); font-size: 19px; margin-bottom: 16px;
}
.why-title { font-size: 14px; font-weight: 500; color: var(--blue-dark); margin-bottom: 8px; }
.why-text { font-size: 12px; color: #6a7a9a; line-height: 1.7; font-weight: 300; }

/* ── INDUSTRIES ── */
.industries { padding: 64px 48px; background: var(--white); }
.chip-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }
.chip {
  padding: 10px 20px; border: 1px solid #dce6f4; border-radius: 24px;
  font-size: 13px; color: var(--text-muted); background: var(--bg-light);
  cursor: pointer; transition: all 0.2s;
}
.chip:hover, .chip.active { background: var(--blue); color: var(--white); border-color: var(--blue); }

/* ── CONTACT ── */
.contact { background: var(--blue-mid); padding: 64px 48px; }
.contact-label {
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold); display: flex; align-items: center; gap: 8px;
  justify-content: center; margin-bottom: 14px;
}
.contact-label::before, .contact-label::after { content: ''; width: 28px; height: 1px; background: var(--gold); }
.contact h2 {
  font-family: 'Noto Serif SC', serif; font-size: 28px; font-weight: 700;
  color: var(--white); text-align: center; margin-bottom: 10px;
}
.contact-sub {
  font-size: 13px; color: #8a9abf; line-height: 1.8; font-weight: 300;
  text-align: center; max-width: 540px; margin: 0 auto 52px;
}
.contact-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.07); border-radius: 12px; overflow: hidden;
  max-width: 1000px; margin: 0 auto;
}
.contact-item {
  background: var(--blue-mid); padding: 32px 24px;
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 14px; transition: background 0.2s;
}
.contact-item:hover { background: #152d6a; }
.contact-icon {
  width: 44px; height: 44px; background: rgba(232,160,32,0.12);
  border-radius: 10px; display: flex; align-items: center;
  justify-content: center; color: var(--gold); font-size: 20px;
}
.contact-lbl { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: #4a5a80; margin-bottom: 2px; }
.contact-val { font-size: 14px; color: #d0daee; font-weight: 400; line-height: 1.5; }
.contact-hint { font-size: 11px; color: #4a5a80; margin-top: 2px; }

/* ── FOOTER ── */
.footer {
  background: #070f24; padding: 24px 48px;
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.footer-logo-letters { display: flex; }
.fl-c, .fl-n { font-size: 18px; font-weight: 700; color: var(--gold); font-family: 'Noto Serif SC', serif; }
.fl-a { font-size: 18px; font-weight: 700; color: #4a8ae0; font-family: 'Noto Serif SC', serif; }
.footer-tagline { font-size: 12px; color: #4a5a80; }
.footer-sub-text { font-size: 10px; color: #2a3a5a; letter-spacing: 0.04em; }
.footer-copy { font-size: 11px; color: #2a3a5a; letter-spacing: 0.03em; }

/* ── 平板 / 移动端 ── */
@media (max-width: 1100px) {
  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .service-card::after {
    display: none !important;
  }
  .service-card:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }
}

@media (max-width: 1024px) and (min-width: 901px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .nav {
    padding: 0 16px;
    height: 60px;
  }
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
  .nav-drawer {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 28px;
    background: var(--white);
    border-top: 1px solid var(--border);
    box-shadow: 0 12px 40px rgba(7, 15, 36, 0.12);
    transform: translateX(100%);
    transition: transform 0.28s ease;
    overflow-y: auto;
    z-index: 101;
    -webkit-overflow-scrolling: touch;
  }
  .nav-open .nav-drawer {
    transform: translateX(0);
  }
  .nav-links {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }
  .nav-links li {
    border-bottom: 1px solid var(--border);
  }
  .nav-links a {
    display: block;
    padding: 16px 20px;
    font-size: 15px;
    border-bottom: none;
  }
  .nav-btn-drawer {
    margin: 20px 20px 0;
    text-align: center;
    padding: 14px 22px;
  }

  .hero {
    padding: 56px 0 72px;
  }
  .hero::before {
    width: 320px;
    height: 320px;
    inset: -10% -20% auto auto;
  }
  .hero-mask {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.2));
  }
  .tag-row {
    font-size: clamp(15px, 4vw, 18px);
    gap: 10px;
    margin: 18px 0 14px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    margin-top: 22px;
  }
  .hero-actions .btn {
    text-align: center;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }
  .service-card::after {
    display: none !important;
  }
  .service-card {
    min-height: 0;
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .service-card:last-child {
    border-bottom: none;
  }

  .about {
    grid-template-columns: 1fr;
  }
  .about-left {
    padding: 40px 20px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .about-right {
    padding: 40px 20px;
  }

  .services,
  .why,
  .industries,
  .contact {
    padding: 40px 20px;
  }
  .svc-grid {
    grid-template-columns: 1fr;
    margin-top: 28px;
    gap: 16px;
  }
  .svc-card {
    padding: 24px 20px;
  }

  .why-grid {
    grid-template-columns: 1fr;
    margin-top: 28px;
    gap: 14px;
  }

  .chip-row {
    margin-top: 24px;
    gap: 8px;
  }
  .chip {
    padding: 9px 16px;
    font-size: 12px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    max-width: none;
  }
  .contact-item {
    padding: 24px 18px;
  }
  .contact-val {
    overflow-wrap: anywhere;
    word-break: break-word;
  }
  .contact h2 {
    font-size: clamp(22px, 5.5vw, 28px);
  }
  .contact-sub {
    margin-bottom: 32px;
    font-size: 14px;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px 20px;
  }
}

@media (max-width: 380px) {
  .logo-text .logo-tagline {
    font-size: 11px;
  }
  .nav-logo {
    gap: 8px;
    min-width: 0;
  }
  .logo {
    height: 32px;
  }
}