:root {
  --bg: #08152a;
  --bg-soft: #0f2242;
  --card: #10284d;
  --text: #e9f1ff;
  --muted: #9fb2d1;
  --brand: #2f8cff;
  --brand-2: #49b4ff;
  --line: rgba(160, 190, 230, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 0, #122f5f 0, var(--bg) 45%);
  line-height: 1.6;
}

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

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(8px);
  background: rgba(8, 21, 42, 0.84);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 68px;
  gap: 12px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
  white-space: nowrap;
}

.logo span {
  color: var(--brand-2);
}

.menu {
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: var(--muted);
}

.menu a.active {
  color: #d5e8ff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-toggle,
.menu-toggle {
  border: 1px solid var(--line);
  background: rgba(10, 22, 44, 0.65);
  color: #d6e9ff;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
}

.menu-toggle {
  display: none;
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--line);
  padding: 10px 0 16px;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 10px 0;
  color: #bfd3f1;
  border-bottom: 1px dashed rgba(160, 190, 230, 0.18);
}

.hero {
  padding: 82px 0 66px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid rgba(73, 180, 255, 0.35);
  border-radius: 999px;
  color: #b7dcff;
  font-size: 12px;
  margin-bottom: 14px;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4.5vw, 48px);
  line-height: 1.2;
}

.hero p {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 680px;
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.btn-primary {
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  color: #fff;
}

.btn-ghost {
  border: 1px solid var(--line);
  color: #c6d9f7;
}

.hero-side {
  background: linear-gradient(160deg, rgba(47, 140, 255, 0.24), rgba(73, 180, 255, 0.08));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}

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

.kpi {
  background: rgba(7, 17, 36, 0.5);
  border: 1px solid rgba(160, 190, 230, 0.18);
  border-radius: 10px;
  padding: 12px;
}

.kpi b {
  display: block;
  font-size: 22px;
  color: #cbe4ff;
}

section {
  padding: 62px 0;
}

.section-title {
  margin: 0 0 10px;
  font-size: 28px;
}

.section-desc {
  margin: 0 0 26px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  background: linear-gradient(180deg, rgba(25, 56, 102, 0.55), rgba(16, 40, 77, 0.75));
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  min-height: 130px;
}

.step i {
  display: inline-flex;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(47, 140, 255, 0.25);
  justify-content: center;
  align-items: center;
  font-style: normal;
  font-size: 13px;
  margin-bottom: 10px;
  color: #cce3ff;
}

.step h4 {
  margin: 0 0 8px;
  font-size: 15px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.case {
  background: #0f2445;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}

.case-link {
  display: block;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.case-link:hover {
  transform: translateY(-3px);
  border-color: rgba(73, 180, 255, 0.5);
}

.case h4 {
  margin: 0 0 8px;
  color: #d5e9ff;
}

.case p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.case-more {
  margin-top: 12px;
  color: #cde4ff;
  font-size: 13px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.case-cover {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0c1d39;
  display: block;
}

.case-gallery {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.case-gallery img {
  width: 100%;
  height: 96px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #0c1d39;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  color: #b9d7ff;
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
}

.list li {
  margin: 6px 0;
}

.contact {
  background: linear-gradient(160deg, #0f2242, #0b1a35);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.contact strong {
  font-size: 22px;
  color: #d8ebff;
}

footer {
  padding: 18px 0 30px;
  color: #8fa4c6;
  font-size: 13px;
  text-align: center;
}

.page-banner {
  padding: 54px 0 28px;
  border-bottom: 1px solid var(--line);
}

.page-banner h1 {
  margin-bottom: 8px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .menu {
    display: none;
  }

  .menu-toggle {
    display: inline-block;
  }

  .hero-grid,
  .cards,
  .timeline,
  .cases,
  .promise-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding-top: 52px;
  }
}


/* 让 6 个证书在一行显示，和系统运维流程样式一致 */
.certification-timeline {
  display: flex;
  gap: 16px;
}
.certification-timeline .step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.certification-timeline .step h4 {
  width: 100%;
  min-height: 48px;
  margin-bottom: 12px;
}
.certification-timeline .cert-img-wrapper {
  width: 82%;
  margin-top: auto;
}
.certification-step {
  flex: 1;
  min-width: 0;
}

/* 证书图片容器：缩小、比例946:1280、蓝色背景 */
.cert-img-wrapper {
  width: 100%;
  aspect-ratio: 946 / 1280;
  background: linear-gradient(135deg, #e6f4ff 0%, #c6e2ff 100%);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  box-shadow: 0 2px 8px rgba(0,100,200,0.1);
}

/* 图片完整显示、不变形 */
.cert-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

/* 鼠标悬浮放大 */
.cert-img-wrapper:hover .cert-img {
  transform: scale(1.08);
}

/* 响应式适配：移动端缩小容器高度 */
@media (max-width: 768px) {
  .cert-img-wrapper {
    height: 160px;
  }
}