:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #0b1221;
  --muted: #5f6b84;
  --primary: #111827;
  --accent: #3b82f6;
  --line: #dce3ef;
  --radius: 18px;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans SC', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.14), transparent 36%),
    radial-gradient(circle at 85% 15%, rgba(16, 185, 129, 0.12), transparent 28%),
    var(--bg);
  line-height: 1.7;
}

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

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.section-gap {
  padding: 84px 0;
}

.section-surface {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(245, 247, 251, 0.85);
  border-bottom: 1px solid rgba(220, 227, 239, 0.9);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.brand-main {
  font-weight: 800;
  font-size: 1.1rem;
}

.brand-sub {
  font-size: 0.85rem;
  color: var(--muted);
}

.main-nav .menu-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 18px;
}

.main-nav a {
  font-size: 0.95rem;
  color: #1c2640;
}

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

.header-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 20px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.header-cta,
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #1f2937, #374151);
  box-shadow: 0 10px 24px rgba(31, 41, 55, 0.22);
}

.header-cta:hover,
.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid #c5cfde;
  color: #1f2b46;
  background: #fff;
}

.hero {
  padding-top: 96px;
}

.hero-inner {
  max-width: 820px;
}

.hero-kicker,
.section-kicker {
  display: inline-block;
  border-radius: 999px;
  background: #e6efff;
  color: #2451a6;
  font-size: 0.88rem;
  padding: 6px 12px;
  margin: 0 0 14px;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.65rem, 4vw, 2.3rem);
}

h3 {
  font-size: 1.2rem;
}

.hero-desc,
.section-desc {
  color: var(--muted);
  margin: 16px 0 0;
  max-width: 760px;
}

.hero-badges {
  list-style: none;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 26px 0;
  padding: 0;
}

.hero-badges li {
  border: 1px solid #d7e0ee;
  background: #fff;
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 500;
}

.hero-badges span {
  margin-right: 6px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.grid {
  display: grid;
  gap: 16px;
}

.cards-4 {
  margin-top: 28px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.case-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.advantage-card {
  padding: 20px;
}

.advantage-card .icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #eef4ff;
  margin-bottom: 12px;
  font-size: 1.35rem;
}

.advantage-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.service-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.pill {
  border-radius: 999px;
  border: 1px solid #ced9ea;
  background: #fff;
  padding: 8px 14px;
  font-size: 0.92rem;
}

.cards-3 {
  margin-top: 28px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.case-card {
  overflow: hidden;
}

.case-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.case-content {
  padding: 16px;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-tags span {
  border: 1px solid #d5deec;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: #3a4a66;
}

.case-content p {
  margin: 8px 0 0;
  color: var(--muted);
}

.contact-block {
  text-align: center;
}

.contact-inner {
  max-width: 760px;
}

.contact-inner p {
  color: var(--muted);
}

.contact-inner .btn {
  margin: 12px 0 14px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}

.blog-archive .archive-title {
  margin-top: 4px;
}

.blog-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.blog-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.blog-card-link {
  display: block;
}

.blog-card-thumb img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.blog-card-body {
  padding: 16px;
}

.blog-card-title {
  font-size: 1.1rem;
}

.blog-card-meta {
  margin: 8px 0;
  color: #52617f;
  font-size: 0.9rem;
}

.blog-card-excerpt {
  margin: 0;
  color: var(--muted);
}

.blog-card-more {
  display: inline-block;
  margin-top: 12px;
  font-weight: 700;
  color: #1f3d88;
}

.blog-empty {
  grid-column: 1 / -1;
  padding: 22px;
}

.archive-pagination {
  margin-top: 26px;
}

.archive-pagination .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.archive-pagination .page-numbers {
  border: 1px solid #cfdaeb;
  border-radius: 8px;
  padding: 5px 10px;
  background: #fff;
}

.archive-pagination .current {
  color: #fff;
  border-color: #223468;
  background: #223468;
}

@media (max-width: 980px) {
  .cards-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cards-3 {
    grid-template-columns: 1fr;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 10px 0;
  }

  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 6px;
  }
}

@media (max-width: 640px) {
  .section-gap {
    padding: 64px 0;
  }

  .cards-4 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 72px;
  }
}