:root {
  --ink: #102844;
  --muted: #4d647c;
  --blue: #1d6fe8;
  --blue-deep: #0c4f8c;
  --sky: #eef5fc;
  --line: #d5e3f2;
  --card: #ffffff;
  --hero-0: #062646;
  --hero-1: #0b4a86;
  --hero-2: #1874be;
  --nav-h: 72px;
  --max: 1120px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Noto Sans SC", sans-serif;
  --shadow: 0 16px 40px rgba(12, 48, 92, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: #f7fbff;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea { font: inherit; color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--blue);
  color: #fff;
  padding: 0.7rem 1rem;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(16, 40, 68, 0.05);
}
.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #e8f3ff;
  object-fit: cover;
}
.brand-name { font-size: 1.05rem; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}
.nav-links a {
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 500;
}
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--blue-deep); background: var(--sky); }
.nav-cta {
  margin-left: 0.35rem;
  background: var(--blue) !important;
  color: #fff !important;
}
.nav-cta:hover { background: var(--blue-deep) !important; }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--ink);
  transition: 0.2s;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(ellipse 55% 45% at 88% 8%, rgba(120, 196, 255, 0.28), transparent 60%),
    radial-gradient(ellipse 40% 40% at 8% 90%, rgba(64, 140, 220, 0.35), transparent 70%),
    linear-gradient(165deg, var(--hero-0) 0%, var(--hero-1) 52%, var(--hero-2) 100%);
  padding: 4.5rem 0 4.8rem;
}
.hero-glow {
  position: absolute;
  width: 280px;
  height: 280px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  right: -40px;
  top: -60px;
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  border: 1px solid #b9d4f5;
  color: var(--blue-deep);
  background: #fff;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}
.eyebrow.light {
  color: #d7ebff;
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
}
.hero-en {
  margin-top: 1rem;
  font-family: var(--display);
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.72);
}
.hero h1 {
  margin-top: 0.35rem;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: 0.04em;
  font-weight: 700;
}
.hero-alias {
  margin-top: 0.15rem;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.15;
  font-weight: 700;
  color: #b9dcff;
}
.hero-tagline {
  margin-top: 1.25rem;
  font-size: 1.12rem;
  max-width: 28em;
}
.hero-sub {
  margin-top: 0.35rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 30em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}
.hero-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  padding: 1rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.hero-tile {
  min-height: 132px;
  padding: 1rem 1rem 0.9rem;
  border-radius: 16px;
  background: rgba(8, 36, 70, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-tile strong {
  display: block;
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
}
.hero-tile span {
  display: block;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.86rem;
  line-height: 1.55;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); }
.btn-light { background: #fff; color: var(--blue-deep); }
.btn-light:hover { background: #e7f2ff; }
.btn-line {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}
.btn-line:hover { background: rgba(255, 255, 255, 0.1); }

.band { padding: 4.5rem 0; }
.band-sky { background: linear-gradient(180deg, #f3f8fd 0%, #ffffff 100%); }
.section-head { max-width: 760px; margin-bottom: 1.8rem; }
.section-head h2 {
  margin-top: 0.75rem;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
}
.section-lead {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 1.02rem;
}
.section-lead.light { color: rgba(255, 255, 255, 0.84); }
.section-actions { margin-top: 1.5rem; }

.point-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.point {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.25rem 1.3rem 1.35rem;
  box-shadow: var(--shadow);
}
.point-no {
  font-family: var(--display);
  color: var(--blue);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}
.point h3 { font-size: 1.12rem; margin-bottom: 0.35rem; }
.point p { color: var(--muted); }

.about-copy p {
  color: #24384e;
  margin-bottom: 0.95rem;
  max-width: 68em;
}
.about-copy p:last-child { margin-bottom: 0; }
.promise-bar {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: linear-gradient(90deg, #0b3e72, #1564aa);
  color: #fff;
  border-radius: 18px;
  overflow: hidden;
}
.promise-bar li {
  padding: 1.2rem 1rem;
  text-align: center;
}
.promise-bar li + li { box-shadow: inset 1px 0 0 rgba(255, 255, 255, 0.16); }
.promise-bar strong { display: block; font-size: 1.35rem; }
.promise-bar span { color: rgba(255, 255, 255, 0.82); }

.service-list { display: grid; gap: 1rem; }
.service {
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 1.2rem;
  padding: 1.3rem;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.service-badge {
  border-radius: 18px;
  background: linear-gradient(180deg, #1d74ea, #0e4f92);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 148px;
  text-align: center;
  padding: 1rem;
}
.service-badge b {
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
}
.service-badge small {
  margin-top: 0.45rem;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  opacity: 0.85;
}
.service-body h3 { font-size: 1.35rem; margin-bottom: 0.45rem; }
.service-body p { color: #31475e; margin-bottom: 0.7rem; }
.service-body ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem 1rem;
}
.service-body li {
  background: var(--sky);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  color: #24384e;
  font-size: 0.95rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.8rem;
}
.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem 0.9rem 1.1rem;
}
.step-no {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #e7f1fd;
  color: var(--blue-deep);
  font-weight: 700;
  margin-bottom: 0.7rem;
}
.steps h3 { font-size: 1.02rem; margin-bottom: 0.3rem; }
.steps p { color: var(--muted); font-size: 0.92rem; }

.band-contact {
  background:
    radial-gradient(ellipse 40% 80% at 0% 100%, rgba(90, 170, 240, 0.25), transparent 60%),
    linear-gradient(160deg, #072746, #0e4d88 70%, #1668b0);
  color: #fff;
}
.band-contact h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 0.7rem 0 0.4rem; }
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  align-items: start;
}
.contact-list { margin-top: 1.4rem; display: grid; gap: 0.85rem; }
.contact-list span {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.68);
}
.contact-list a,
.contact-list strong {
  font-size: 1.2rem;
  font-weight: 700;
}
.contact-form {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 22px;
  padding: 1.2rem;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  display: block;
  font-size: 0.82rem;
  margin-bottom: 0.3rem;
  color: rgba(255, 255, 255, 0.8);
}
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 0.9rem;
}
.form-hint, .form-ok { color: rgba(255, 255, 255, 0.8); font-size: 0.9rem; }
.form-ok { margin-bottom: 0.7rem; }

.site-footer {
  background: #061e38;
  color: rgba(255, 255, 255, 0.78);
  padding: 1.6rem 0 1.8rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}
.footer-brand { display: flex; gap: 0.75rem; align-items: center; }
.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #e8f3ff;
}
.footer-brand strong { display: block; color: #fff; }
.footer-brand span, .footer-meta { font-size: 0.86rem; }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  justify-content: flex-end;
}
.footer-meta a:hover { color: #fff; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  transform: translateX(-50%) translateY(12px);
  background: #0e2a4a;
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 980px) {
  .hero-grid,
  .contact-grid,
  .service { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .service-badge { min-height: 92px; flex-direction: row; gap: 0.8rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 0.6rem 1rem 1rem;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.is-open { display: flex; }
  .nav-cta { margin: 0.3rem 0 0; text-align: center; }
  .point-grid,
  .service-body ul,
  .form-grid,
  .promise-bar,
  .hero-panel,
  .steps { grid-template-columns: 1fr; }
  .promise-bar li + li { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16); }
  .hero { padding: 3rem 0 3.2rem; }
  .band { padding: 3.2rem 0; }
}