/* ==========================================================================
   云住养官网 · 共享样式
   ========================================================================== */

:root {
  --c-primary: #29c0d3;
  --c-primary-dark: #1ea3b5;
  --c-primary-soft: #e9f9fb;
  --c-accent: #ef899a;
  --c-accent-soft: #f8c2cc;
  --c-bg: #ffffff;
  --c-bg-soft: #f6fbfc;
  --c-bg-dark: #0e3a4a;
  --c-text: #2e3033;
  --c-text-soft: #6b7480;
  --c-border: #e3eef0;
  --r-md: 12px;
  --r-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(14, 58, 74, .06), 0 1px 2px rgba(14, 58, 74, .04);
  --shadow-md: 0 8px 24px rgba(41, 192, 211, .12);
  --shadow-lg: 0 24px 48px rgba(41, 192, 211, .18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ Nav ============ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; }
.logo-img { height: 36px; width: auto; display: block; }
footer .logo-img { filter: brightness(0) invert(1); opacity: .92; }

.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 15px; color: var(--c-text-soft);
  position: relative; padding: 6px 0;
  transition: color .2s;
}
.nav-links a:hover { color: var(--c-primary); }
.nav-links a.active { color: var(--c-primary); font-weight: 500; }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -22px;
  height: 2px; background: var(--c-primary); border-radius: 1px;
}
.nav-cta {
  padding: 7px 18px; border-radius: 999px;
  background: transparent; color: var(--c-primary-dark) !important;
  border: 1.5px solid var(--c-primary);
  font-size: 15px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all .2s;
  box-sizing: border-box;
}
.nav-cta svg { width: 14px; height: 14px; stroke-width: 2; }
.nav-cta:hover {
  background: var(--c-primary); color: #fff !important;
  transform: translateY(-1px); box-shadow: var(--shadow-md);
}
.nav-cta:hover svg { stroke: #fff; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--c-text); margin: 5px 0; border-radius: 1px;
  transition: .3s;
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav-mobile-open .nav-links {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--c-border);
    padding: 12px 24px;
  }
  .nav-mobile-open .nav-links a {
    padding: 14px 0; border-bottom: 1px solid var(--c-bg-soft);
  }
  .nav-mobile-open .nav-links a.active::after { display: none; }
}

/* ============ Buttons ============ */
.btn {
  padding: 14px 28px; border-radius: 10px;
  font-size: 15px; font-weight: 500;
  transition: all .2s; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  border: none; text-decoration: none;
}
.btn-primary {
  background: var(--c-primary); color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary {
  background: #fff; color: var(--c-text);
  border: 1px solid var(--c-border);
}
.btn-secondary:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-accent { background: var(--c-accent); color: #fff; }
.btn-accent:hover { filter: brightness(.95); transform: translateY(-2px); }

/* ============ Section base ============ */
section { padding: 90px 0; }
@media (max-width: 768px) { section { padding: 60px 0; } }

.sec-head { text-align: center; margin-bottom: 56px; }
.sec-eyebrow {
  color: var(--c-primary); font-size: 15px; font-weight: 600;
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 12px;
}
.sec-title {
  font-size: 36px; font-weight: 800; line-height: 1.3;
  letter-spacing: -.3px;
}
.sec-sub {
  color: var(--c-text-soft); font-size: 19px;
  margin-top: 16px; max-width: 720px;
  margin-left: auto; margin-right: auto;
}
@media (max-width: 768px) { .sec-title { font-size: 28px; } .sec-sub { font-size: 15px; } }

/* ============ Page hero (sub-pages) ============ */
.page-hero {
  padding: 90px 0 70px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(41,192,211,.10), transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(239,137,154,.10), transparent 60%),
    var(--c-bg-soft);
  text-align: center;
}
.page-hero h1 {
  font-size: 44px; font-weight: 800; letter-spacing: -.5px;
  margin-bottom: 18px;
}
.page-hero h1 .highlight {
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero p {
  color: var(--c-text-soft); font-size: 20px;
  max-width: 720px; margin: 0 auto;
}
.crumb {
  color: var(--c-text-soft); font-size: 15px;
  margin-bottom: 24px; letter-spacing: .5px;
}
.crumb a:hover { color: var(--c-primary); }
@media (max-width: 768px) { .page-hero h1 { font-size: 30px; } .page-hero p { font-size: 15px; } }

/* ============ Cards (generic) ============ */
.card {
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 28px;
  transition: all .25s;
}
.card:hover {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

/* ============ Footer ============ */
footer {
  background: var(--c-bg-dark); color: rgba(255,255,255,.7);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand p { font-size: 16px; line-height: 1.7; max-width: 300px; margin-top: 16px; }
.footer-col h5 {
  color: #fff; font-size: 16px; font-weight: 600;
  margin-bottom: 16px; letter-spacing: 1px;
}
.footer-col ul { list-style: none; }
.footer-col li {
  font-size: 16px; padding: 4px 0;
  color: rgba(255,255,255,.6); transition: color .2s;
}
.footer-col a { display: block; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  padding-top: 30px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: space-between;
  font-size: 15px; color: rgba(255,255,255,.5);
  flex-wrap: wrap; gap: 12px;
}
.footer-contact {
  display: flex; flex-wrap: wrap; gap: 24px;
  margin-top: 16px; font-size: 15px;
  color: rgba(255,255,255,.7);
}
.footer-contact strong { color: #fff; font-size: 15px; }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 568px) {
  /* 手机端 footer：4 列变 2 列，缩字号 */
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-col h5 { font-size: 13px; margin-bottom: 12px; }
  .footer-col li { font-size: 13px; padding: 3px 0; }
  .footer-brand p { font-size: 13px; }
  .footer-contact { gap: 14px; font-size: 12px; }
  .footer-contact strong { font-size: 14px; }
  .footer-bottom { font-size: 11px; flex-direction: column; gap: 6px; text-align: center; }
}
@media (max-width: 480px) {
  /* 极窄屏：sec-title 再小一点 */
  .sec-title { font-size: 24px; }
  .page-hero h1 { font-size: 26px; }
}

/* ============ Common section variants ============ */
.bg-soft { background: var(--c-bg-soft); }
.bg-dark {
  background: var(--c-bg-dark); color: #fff;
  position: relative; overflow: hidden;
}
.bg-dark .sec-title, .bg-dark h2, .bg-dark h3, .bg-dark h4 { color: #fff; }
.bg-dark .sec-sub { color: rgba(255,255,255,.7); }
.bg-dark .sec-eyebrow { color: var(--c-accent-soft); }

/* ============ Icon badge (SVG line icon in colored pill) ============ */
.cn-ic {
  display: inline-grid; place-items: center;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), #57d5e7);
  color: #fff;
  vertical-align: middle;
  box-sizing: border-box;
  flex-shrink: 0;
}
.cn-ic svg { width: 22px; height: 22px; display: block; stroke-width: 2; }
.cn-ic-sm { width: 32px; height: 32px; border-radius: 8px; }
.cn-ic-sm svg { width: 16px; height: 16px; }
.cn-ic-lg { width: 56px; height: 56px; border-radius: 12px; }
.cn-ic-lg svg { width: 28px; height: 28px; }
.cn-ic-xl { width: 64px; height: 64px; border-radius: 14px; }
.cn-ic-xl svg { width: 32px; height: 32px; }
.cn-ic.accent { background: linear-gradient(135deg, var(--c-accent), #f8c2cc); }
.cn-ic.dark   { background: linear-gradient(135deg, var(--c-bg-dark), #1a5a72); }
.cn-ic.warm   { background: linear-gradient(135deg, #d68a3f, #e8b677); }
.cn-ic.cool   { background: linear-gradient(135deg, #5e9b6f, #8fc49d); }

/* When .cn-ic appears inline before heading text */
h2 .cn-ic, h3 .cn-ic, h4 .cn-ic, h5 .cn-ic { margin-right: 8px; }

/* ============ 中文长段落两端对齐 ============ */
/* text-justify: inter-ideograph 让汉字间距自动均匀分布，避免大空隙 */
.hero-sub,
.intro-grid p,
.region p,
.dwd-wheel li span,
.platform-cap p,
.plat p,
.feature-block .fb-l p,
.aiot-card p,
.cap-card p,
.sys p,
.sol-block .sb-l p,
.scope p,
.nineseventhree p,
.case-detail .case-body p,
.case-side blockquote,
.biz-card p,
.ctx-note,
.arch-q p,
.video-meta p {
  text-align: justify;
  text-justify: inter-ideograph;
}

/* ============ Tag pill ============ */
.pill {
  display: inline-block; padding: 4px 12px;
  background: var(--c-primary-soft); color: var(--c-primary-dark);
  border-radius: 999px; font-size: 15px; font-weight: 500;
}
.pill-accent { background: rgba(239,137,154,.15); color: #c75a6f; }
.pill-dark { background: rgba(255,255,255,.12); color: #fff; }