/* ==========================================================================
   中创云联企业官网 · 纯静态样式表
   基准视口 1440px / 内容区 1200px / 左右内边距 120px
   ========================================================================== */

:root {
  --brand: #14468C;
  --navy: #0C2340;
  --navy-deep: #081A30;
  --bg-soft: #F7F9FC;
  --border: #E3E9F1;
  --title: #16202E;
  --body: #5C6B7F;
  --body-strong: #334155;
  --muted: #8A97A8;
  --placeholder: #B45309;
  --placeholder-dark: #E2A65A;
  --card-shadow: 0 2px 10px rgba(16, 42, 76, 0.04);
  --gutter: 120px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: #FFFFFF;
  color: var(--body-strong);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Hiragino Sans GB", sans-serif;
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1,
h2,
h3,
p,
dl,
dd,
ol,
ul {
  margin: 0;
}

[id] {
  scroll-margin-top: 92px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid #5B9BEF;
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -70px;
  left: 16px;
  z-index: 60;
  padding: 10px 16px;
  border-radius: 8px;
  background: #FFFFFF;
  color: var(--brand);
  font-size: 13px;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(8, 26, 48, 0.16);
}

.skip-link:focus {
  top: 12px;
}

.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* --------------------------------------------------------------------------
   通用按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #FFFFFF;
}

.btn--primary:hover {
  background: #0F3A76;
  border-color: #0F3A76;
}

.btn--light {
  background: #FFFFFF;
  border-color: #FFFFFF;
  color: var(--brand);
}

.btn--light:hover {
  background: #EAF1FB;
  border-color: #EAF1FB;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: #FFFFFF;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 255, 255, 0.75);
}

/* --------------------------------------------------------------------------
   1. 顶部导航
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--title);
}

.brand-text small {
  margin-top: 3px;
  font-size: 8.5px;
  letter-spacing: 0.055em;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  flex: 1 1 auto;
  min-width: 0;
}

.nav-links a {
  padding: 8px 0;
  font-size: 13.5px;
  color: #4A5A70;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--brand);
}

.nav-links a.is-current {
  color: var(--brand);
  font-weight: 600;
}

.nav-cta {
  flex: none;
  min-height: 36px;
  padding: 0 18px;
  border-radius: 7px;
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   通用区块标题
   -------------------------------------------------------------------------- */
.section {
  padding-block: 88px;
}

.section--white {
  background: #FFFFFF;
}

.section--soft {
  background: var(--bg-soft);
}

.eyebrow {
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--brand);
}

.eyebrow span {
  margin-left: 6px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #7C93B4;
}

.eyebrow--on-dark {
  color: #8FB6F0;
}

.eyebrow--on-dark span {
  color: #6E8DB5;
}

.section-title {
  margin-bottom: 12px;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--title);
}

.section-desc {
  max-width: 840px;
  margin-bottom: 40px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--body);
}

.section-title--light {
  color: #FFFFFF;
}

.section-desc--light {
  color: #B7C7DD;
}

/* --------------------------------------------------------------------------
   2. 首屏
   -------------------------------------------------------------------------- */
.hero {
  padding-block: 92px 96px;
  color: #FFFFFF;
  background:
    radial-gradient(1000px 620px at 92% 0%, rgba(38, 103, 181, 0.55) 0%, rgba(38, 103, 181, 0) 62%),
    linear-gradient(118deg, #091C34 0%, #0E2C55 52%, #174B8C 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 72px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  font-size: 12.5px;
  color: #D8E6F7;
}

.hero-dot {
  width: 5px;
  height: 5px;
  flex: none;
  border-radius: 50%;
  background: #6FA8FF;
}

.hero h1 {
  margin-bottom: 22px;
  font-size: clamp(32px, 3.6vw, 48px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: #FFFFFF;
}

.hero-desc {
  max-width: 520px;
  margin-bottom: 30px;
  font-size: 15px;
  line-height: 1.95;
  color: #BFD0E6;
}

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

.hero-note {
  margin-top: 34px;
  font-size: 12.5px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: #8FA6C2;
}

.hero-media img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  box-shadow: 0 24px 60px rgba(2, 12, 28, 0.35);
}

/* --------------------------------------------------------------------------
   3. 企业简介
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: start;
  gap: 72px;
}

.about-copy p {
  margin-bottom: 18px;
  font-size: 14.5px;
  line-height: 2;
  color: var(--body);
}

.about-copy .pull-quote {
  margin: 26px 0 0;
  padding: 16px 20px;
  border-radius: 8px;
  background: #EDF3FC;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--brand);
}

.bottom-card {
  padding: 30px 32px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  box-shadow: var(--card-shadow);
}

.bottom-card h3 {
  margin-bottom: 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
}

.bottom-list {
  display: grid;
  gap: 18px;
  padding: 0;
  list-style: none;
}

.bottom-list li {
  display: flex;
  align-items: baseline;
  gap: 18px;
  font-size: 14px;
  color: var(--body-strong);
}

.bottom-list .num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   4. 核心优势
   -------------------------------------------------------------------------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: 24px;
}

.feature-card,
.solution-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #FFFFFF;
  box-shadow: var(--card-shadow);
}

.feature-card {
  padding: 30px 32px 32px;
}

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 22px;
  border-radius: 9px;
  background: #EAF1FB;
  color: var(--brand);
}

.icon-box svg {
  width: 21px;
  height: 21px;
}

.feature-card h3 {
  margin-bottom: 22px;
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
}

.plain-list {
  display: grid;
  gap: 14px;
  padding: 0;
  list-style: none;
}

.plain-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--body);
}

.dark-band {
  margin-top: 26px;
  padding: 22px 32px;
  border-radius: 10px;
  background: var(--navy);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: #E8F0FB;
}

/* --------------------------------------------------------------------------
   5. 产品方案
   -------------------------------------------------------------------------- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 24px;
}

.solution-card {
  display: flex;
  flex-direction: column;
  padding: 28px 28px 30px;
}

.solution-card h3 {
  margin-bottom: 14px;
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
}

.solution-desc {
  margin-bottom: 20px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--body);
}

.solution-points {
  margin-top: auto;
}

.solution-points p {
  margin-bottom: 7px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--brand);
}

.solution-points p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   6. 联系我们
   -------------------------------------------------------------------------- */
.contact {
  padding-block: 88px;
  background: var(--navy);
  color: #FFFFFF;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: 88px;
}

.contact-copy .section-desc {
  max-width: 480px;
  margin-bottom: 30px;
}

.contact-hint {
  margin-top: 24px;
  font-size: 13px;
  line-height: 1.9;
  color: #8FA6C2;
}

.contact-hint a {
  color: #BBD4F5;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-card {
  padding: 32px 34px;
  border-radius: 12px;
  background: #FFFFFF;
  color: var(--title);
  box-shadow: 0 18px 44px rgba(3, 14, 30, 0.18);
}

.contact-card h3 {
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
}

.contact-row {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.8;
}

.contact-row dt {
  width: 72px;
  flex: none;
  color: var(--body);
}

.contact-row dd {
  color: var(--body-strong);
}

.contact-list a {
  color: inherit;
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.contact-rule {
  height: 1px;
  margin: 18px 0;
  background: var(--border);
}

.contact-list--pending .contact-row {
  font-weight: 600;
}

.contact-list--pending dt,
.contact-list--pending dd {
  color: var(--placeholder);
}

.contact-note {
  margin-top: 22px;
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   7. 页脚与备案信息
   -------------------------------------------------------------------------- */
.site-footer {
  padding-block: 64px 40px;
  background: var(--navy-deep);
  color: #9AACC2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  align-items: start;
  gap: 48px;
}

.site-footer .brand-text strong {
  color: #FFFFFF;
}

.site-footer .brand-text small {
  color: #7A90AB;
}

.footer-brand p {
  max-width: 330px;
  margin-top: 18px;
  font-size: 12.5px;
  line-height: 1.9;
  color: #8A9CB2;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.footer-col h3 {
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
}

.footer-col a {
  font-size: 13px;
  color: #9AACC2;
  text-decoration: none;
}

.footer-col a:hover {
  color: #FFFFFF;
}

.footer-rule {
  height: 1px;
  margin: 48px 0 24px;
  background: #20364F;
}

.footer-org {
  margin-bottom: 12px;
  font-size: 12.5px;
  line-height: 1.8;
  color: #8A9CB2;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px 20px;
}

.copyright {
  font-size: 12.5px;
  color: #8A9CB2;
}

.beian {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 12.5px;
}

.beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.beian a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.beian-icon {
  width: 14px;
  height: 14px;
  flex: none;
}

.placeholder-on-dark {
  color: var(--placeholder-dark);
}

/* --------------------------------------------------------------------------
   响应式：≤1024px 收窄内边距；≤768px 所有横向排布改单列
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --gutter: 48px;
  }

  .section,
  .contact {
    padding-block: 72px;
  }

  .hero {
    padding-block: 76px 80px;
  }

  .nav-inner {
    gap: 20px;
  }

  .nav-links {
    gap: 20px;
  }

  .hero-grid,
  .about-grid {
    gap: 40px;
  }

  .contact-grid {
    gap: 48px;
  }

  .footer-grid {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --gutter: 20px;
  }

  .section,
  .contact {
    padding-block: 60px;
  }

  .hero {
    padding-block: 56px 64px;
  }

  .nav-inner {
    height: auto;
    min-height: 64px;
    flex-wrap: wrap;
    gap: 10px 14px;
    padding-block: 10px;
  }

  .nav-cta {
    margin-left: auto;
  }

  .nav-links {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
    gap: 20px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .hero-grid,
  .about-grid,
  .advantage-grid,
  .solution-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-media {
    margin-top: 8px;
  }

  .hero h1 {
    font-size: clamp(29px, 7.2vw, 38px);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 320px;
  }

  .section-title {
    font-size: 26px;
  }

  .section-desc {
    margin-bottom: 32px;
  }

  .advantage-grid,
  .solution-grid {
    gap: 16px;
  }

  .dark-band {
    padding: 18px 20px;
    text-align: center;
  }

  .contact-grid {
    gap: 36px;
  }

  .footer-grid {
    gap: 28px;
  }

  .footer-rule {
    margin: 36px 0 22px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .beian {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .brand-text small {
    display: none;
  }

  .contact-card {
    padding: 26px 22px;
  }

  .contact-row dt {
    width: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}