/* 云上宝清 · 官网样式
   无外部依赖（不引 CDN 字体 / 图标 / JS），保证审核环境可完整加载。 */

:root {
  --ink:        #12304a;
  --ink-soft:   #3c5a70;
  --muted:      #6b8294;
  --accent:     #0e7c7b;
  --accent-lt:  #5fd0c5;
  --line:       #dce6ea;
  --line-soft:  #e9f0f2;
  --bg:         #ffffff;
  --bg-tint:    #f5f9fa;
  --bg-deep:    #0f2b42;
  --radius:     10px;
  --shadow:     0 2px 14px rgba(18, 48, 74, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

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

h1, h2, h3 { line-height: 1.35; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: 2.5rem; font-weight: 750; }
h2 { font-size: 1.85rem; font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 700; }
p  { margin: 0 0 1em; color: var(--ink-soft); }
p:last-child { margin-bottom: 0; }

.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--ink);
  color: #fff; padding: 8px 14px; z-index: 200;
}
.skip-link:focus { left: 12px; top: 12px; }

.eyebrow {
  font-size: .78rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin: 0 0 .8em;
}
.accent { color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 22px; border-radius: 7px; font-weight: 600; font-size: .94rem;
  border: 1px solid transparent; transition: .18s ease; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #0a6564; color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: saturate(160%) blur(8px);
}
.header-inner { display: flex; align-items: center; gap: 26px; min-height: 72px; }

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-text strong { font-size: 1.02rem; font-weight: 750; color: var(--ink); }
.brand-text small { font-size: .72rem; color: var(--muted); letter-spacing: .03em; }

.site-nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.site-nav a { font-size: .92rem; color: var(--ink-soft); font-weight: 500; }
.site-nav a:hover, .site-nav a.active { color: var(--accent); }
.header-cta { padding: 9px 18px; font-size: .88rem; }

.nav-toggle {
  display: none; margin-left: auto; padding: 8px 14px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); border-radius: 6px;
  font-family: var(--font); font-size: .88rem; color: var(--ink);
}

/* ---------------------------------------------------------- hero */
.hero {
  background: linear-gradient(180deg, #f7fbfb 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line-soft);
}
.hero-inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px;
  align-items: center; padding: 76px 0 80px;
}
.hero-copy h1 { margin-bottom: .55em; }
.hero-lead { font-size: 1.04rem; max-width: 560px; margin-bottom: 1.7em; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 2em; }
.hero-points { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.hero-points li {
  position: relative; padding-left: 22px; font-size: .91rem; color: var(--ink-soft);
}
.hero-points li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent-lt); box-shadow: 0 0 0 3px rgba(95, 208, 197, .18);
}
.hero-visual { width: 100%; }

/* ---------------------------------------------------------- facts */
.facts { background: var(--bg-deep); color: #fff; }
.facts-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact {
  padding: 22px 20px; border-right: 1px solid rgba(255,255,255,.12);
  display: flex; flex-direction: column; gap: 3px;
}
.fact:last-child { border-right: none; }
.fact strong { font-size: 1.02rem; font-weight: 700; color: #ffffff; }
.fact span { font-size: .82rem; color: #a9c6d2; }

/* ---------------------------------------------------------- sections */
.section { padding: 78px 0; }
.section-tint { background: var(--bg-tint); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.section-head { max-width: 720px; margin: 0 auto 46px; text-align: center; }
.section-lead { color: var(--muted); font-size: .99rem; }

.prose h3 { color: var(--ink); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; max-width: 980px; margin: 0 auto; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px 24px; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
}
.card-no {
  font-size: .78rem; font-weight: 700; letter-spacing: .12em;
  color: var(--accent); display: block; margin-bottom: 14px;
}
.card h3 { margin-bottom: .55em; }
.card p { font-size: .92rem; flex: 1; }
.card-tags { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 7px; }
.card-tags li {
  font-size: .75rem; color: var(--accent); background: #eaf5f4;
  border: 1px solid #cfe8e5; border-radius: 4px; padding: 3px 9px;
}

.arch-figure {
  background: var(--bg-tint); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.figure-caption { font-size: .86rem; color: var(--muted); margin: 14px 0 0; text-align: center; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; position: relative;
}
.step-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%; background: var(--ink); color: #fff;
  font-weight: 700; font-size: .9rem; margin-bottom: 14px;
}
.step h3 { font-size: 1rem; }
.step p { font-size: .88rem; }

.notice {
  margin-top: 34px; background: #fff; border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0; padding: 20px 24px;
  border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.notice strong { display: block; margin-bottom: 6px; }
.notice p { font-size: .9rem; margin: 0; }
code { background: var(--bg-tint); border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; font-size: .88em; }

.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 960px; margin: 0 auto; }
.scenario { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; }
.scenario p { font-size: .92rem; }

.section-cta { background: var(--bg-deep); color: #fff; }
.section-cta .eyebrow { color: var(--accent-lt); }
.section-cta h2 { color: #fff; }
.section-cta p { color: #b9d0dc; }
.cta-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.contact-list { display: grid; gap: 14px; }
.contact-list div {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  border-bottom: 1px solid rgba(255,255,255,.14); padding-bottom: 12px;
}
.contact-list span { font-size: .85rem; color: #a9c6d2; }
.contact-list strong { font-size: .98rem; font-weight: 600; color: #fff; }

/* ---------------------------------------------------------- footer */
.site-footer { background: #0b2237; color: #c6d8e1; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 40px; padding: 56px 0 44px; }
.footer-brand strong { display: block; color: #fff; font-size: 1.05rem; margin-bottom: 12px; }
.footer-brand p { font-size: .86rem; color: #92b0c1; max-width: 320px; }
.footer-col h3 { color: #fff; font-size: .92rem; margin-bottom: 16px; }
.footer-col a { display: block; font-size: .86rem; color: #a8c3d0; padding: 3px 0; }
.footer-col a:hover { color: var(--accent-lt); }
.footer-legal p { font-size: .84rem; color: #a8c3d0; margin-bottom: 8px; }
.footer-legal span { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-bottom p { font-size: .8rem; color: #88a8b8; margin: 0; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: #a8c3d0; }
.footer-links a:hover { color: var(--accent-lt); }

/* ---------------------------------------------------------- 协议页 */
.legal-page { padding: 56px 0 80px; }
.legal-wrap { max-width: 860px; margin: 0 auto; }
.legal-wrap h1 { font-size: 2rem; margin-bottom: .3em; }
.legal-meta { color: var(--muted); font-size: .88rem; border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 30px; }
.legal-wrap h2 { font-size: 1.2rem; margin-top: 2em; padding-left: 12px; border-left: 3px solid var(--accent); }
.legal-wrap p, .legal-wrap li { font-size: .94rem; color: var(--ink-soft); }
.legal-wrap ol, .legal-wrap ul { padding-left: 22px; }
.legal-note { background: var(--bg-tint); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; font-size: .88rem; margin-top: 36px; }

/* ---------------------------------------------------------- responsive */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; padding: 52px 0 60px; }
  .hero-visual { max-width: 560px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .facts-grid { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(2) { border-right: none; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

@media (max-width: 720px) {
  .container { width: min(100% - 32px, 1160px); }
  .site-nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 16px;
    box-shadow: 0 8px 20px rgba(18,48,74,.08);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 0; border-bottom: 1px solid var(--line-soft); }
  .nav-toggle { display: inline-block; }
  .header-cta { display: none; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .section { padding: 54px 0; }
  .two-col, .cta-inner, .scenario-grid, .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cards, .steps { grid-template-columns: 1fr; }
  .facts-grid { grid-template-columns: 1fr; }
  .fact { border-right: none; border-bottom: 1px solid rgba(255,255,255,.12); }
  .fact:last-child { border-bottom: none; }
  .footer-bottom .container { flex-direction: column; }
}