:root {
  --blue-900: #12345a;
  --blue-700: #1f6fb8;
  --blue-500: #43a4e8;
  --blue-100: #eaf6ff;
  --gray-900: #1f2937;
  --gray-700: #4b5563;
  --gray-500: #6b7280;
  --gray-100: #f4f7fb;
  --white: #ffffff;
  --shadow: 0 14px 34px rgba(31, 111, 184, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--gray-900);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.7;
  background: var(--white);
}

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.section-anchor {
  scroll-margin-top: 84px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(31, 111, 184, 0.1);
  backdrop-filter: blur(12px);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 12px;
  font-weight: 700;
  color: var(--blue-900);
}

.brand-mark {
  display: inline-grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius);
  color: var(--white);
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
}

.brand-text {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--gray-700);
  font-size: 15px;
}

.nav-menu a:hover {
  color: var(--blue-700);
}

.nav-call {
  padding: 9px 16px;
  color: var(--white) !important;
  border-radius: var(--radius);
  background: var(--blue-700);
  box-shadow: 0 8px 20px rgba(31, 111, 184, 0.2);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(31, 111, 184, 0.18);
  border-radius: var(--radius);
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--blue-900);
}

.hero {
  padding: 92px 0 78px;
  background:
    linear-gradient(115deg, rgba(234, 246, 255, 0.96), rgba(255, 255, 255, 0.86)),
    url("assets/hero-printing.png") center/cover;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  align-items: center;
  gap: 54px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue-700);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--blue-900);
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.2;
  letter-spacing: 0;
}

.hero-subtitle {
  margin-bottom: 12px;
  color: var(--gray-900);
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 700;
}

.hero-intro {
  max-width: 640px;
  margin-bottom: 32px;
  color: var(--gray-700);
  font-size: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--white);
  background: var(--blue-700);
  box-shadow: 0 12px 26px rgba(31, 111, 184, 0.25);
}

.btn-primary:hover {
  background: var(--blue-900);
}

.btn-secondary {
  color: var(--blue-900);
  background: var(--white);
  border: 1px solid rgba(31, 111, 184, 0.2);
}

.hero-panel {
  padding: 22px;
  border: 1px solid rgba(31, 111, 184, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

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

.panel-card {
  min-height: 84px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--gray-100);
  color: var(--blue-900);
  font-weight: 700;
}

.panel-card.large {
  display: flex;
  align-items: center;
  min-height: 120px;
  margin-bottom: 12px;
  gap: 18px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
}

.panel-number {
  font-size: 56px;
  line-height: 1;
}

.section {
  padding: 86px 0;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 38px;
  text-align: center;
}

.section-heading.align-left {
  margin: 0;
  text-align: left;
}

.section-heading h2,
.contact-info h2 {
  margin-bottom: 12px;
  color: var(--blue-900);
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.25;
}

.section-heading p,
.contact-tip {
  color: var(--gray-700);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.service-card,
.advantage-item,
.wechat-card {
  border: 1px solid rgba(31, 111, 184, 0.1);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.service-card {
  min-height: 220px;
  padding: 28px;
}

.service-card-wide {
  grid-column: span 2;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 26px;
  border-radius: var(--radius);
  color: var(--blue-700);
  background: var(--blue-100);
  font-weight: 800;
}

.service-card h3,
.advantage-item h3 {
  margin-bottom: 10px;
  color: var(--blue-900);
  font-size: 21px;
}

.service-card p,
.advantage-item p {
  margin-bottom: 0;
  color: var(--gray-700);
}

.about {
  padding: 78px 0;
  background: var(--gray-100);
}

.about-inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: start;
}

.about-text {
  padding: 34px;
  border-left: 4px solid var(--blue-700);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--gray-700);
  font-size: 18px;
  box-shadow: var(--shadow);
}

.about-text p {
  margin-bottom: 0;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.advantage-item {
  padding: 26px;
}

.advantage-item::before {
  content: "";
  display: block;
  width: 38px;
  height: 4px;
  margin-bottom: 22px;
  border-radius: 999px;
  background: var(--blue-500);
}

.contact {
  padding: 86px 0;
  background: linear-gradient(180deg, var(--blue-100), var(--white));
}

.contact-inner {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: start;
}

.contact-tip {
  margin-bottom: 28px;
}

.contact-list {
  margin: 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(31, 111, 184, 0.12);
}

.contact-list dt {
  color: var(--gray-500);
}

.contact-list dd {
  margin: 0;
  color: var(--blue-900);
  font-weight: 700;
}

.contact-list a {
  color: var(--blue-700);
}

.wechat-card {
  display: grid;
  justify-items: center;
  gap: 22px;
  padding: 34px;
  text-align: center;
}

.wechat-qr-wrap {
  width: min(260px, 100%);
  padding: 16px;
  border: 1px solid rgba(31, 111, 184, 0.14);
  border-radius: var(--radius);
  background: var(--white);
}

.wechat-qr-wrap img {
  display: block;
  width: 100%;
  height: auto;
}

.wechat-card-text h3 {
  margin-bottom: 10px;
  color: var(--blue-900);
  font-size: 24px;
}

.wechat-card-text p {
  max-width: 430px;
  margin: 0 auto 16px;
  color: var(--gray-700);
}

.wechat-card-text span {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--blue-700);
  background: var(--blue-100);
  font-weight: 700;
}

.site-footer {
  padding: 24px 0;
  color: rgba(255, 255, 255, 0.86);
  text-align: center;
  background: var(--blue-900);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 20px 20px;
    background: var(--white);
    border-bottom: 1px solid rgba(31, 111, 184, 0.1);
    box-shadow: 0 16px 30px rgba(18, 52, 90, 0.08);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 12px 0;
  }

  .nav-call {
    margin-top: 8px;
    text-align: center;
  }

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

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1160px);
  }

  .navbar {
    min-height: 66px;
  }

  .brand-text {
    max-width: calc(100vw - 126px);
    font-size: 15px;
  }

  .nav-menu {
    top: 66px;
  }

  .hero {
    padding: 58px 0 52px;
  }

  .hero-intro {
    font-size: 16px;
  }

  .hero-actions,
  .hero-actions .btn {
    width: 100%;
  }

  .section,
  .contact {
    padding: 62px 0;
  }

  .service-grid,
  .advantage-grid,
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .service-card-wide {
    grid-column: auto;
  }

  .service-card,
  .advantage-item,
  .wechat-card,
  .about-text {
    padding: 22px;
  }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}