/* ==========================================================================
   商析云创 30 站站群 —— 全站通用样式表 (base.css)
   纯静态 · 响应式 · 无外部依赖
   ========================================================================== */

:root {
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --accent: #0ea5e9;
  --accent-2: #22d3ee;
  --ink: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --soft: #f5f8fd;
  --card: #ffffff;
  --ok: #059669;
  --warn: #d97706;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
  --wrap: 1200px;
  --header-h: 68px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, "Courier New", monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: #fff;
  overflow-x: hidden;
}

img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4, h5 { color: var(--ink); line-height: 1.35; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(26px, 4vw, 42px); letter-spacing: -.5px; }
h2 { font-size: clamp(22px, 2.6vw, 30px); }
h3 { font-size: 19px; }
h4 { font-size: 16px; }
p { margin: 0 0 1.1em; }
ul, ol { padding-left: 1.35em; margin: 0 0 1.1em; }
li { margin-bottom: .45em; }
code { font-family: var(--font-mono); font-size: .92em; background: var(--soft); padding: 2px 6px; border-radius: 6px; color: var(--primary-dark); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.4rem 0; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--primary); color: #fff; padding: 10px 18px; z-index: 999; }
.skip-link:focus { left: 12px; top: 12px; }

/* ---------------------------------------------------------------- 滚动渐入 */
/* 默认完全可见（无 JS 或打印/预渲染时保证内容可读）；
   仅在脚本成功注册后由 body.js-reveal 打开动画初始态 */
body.js-reveal .card,
body.js-reveal .stat,
body.js-reveal .step,
body.js-reveal .post,
body.js-reveal .media-item,
body.js-reveal .timeline-item {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}
body.js-reveal .is-revealed { opacity: 1 !important; transform: none !important; }
@media (prefers-reduced-motion: reduce) {
  body.js-reveal .card,
  body.js-reveal .stat,
  body.js-reveal .step,
  body.js-reveal .post,
  body.js-reveal .media-item,
  body.js-reveal .timeline-item { opacity: 1; transform: none; transition: none; }
}

/* ---------------------------------------------------------------- 顶部导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: var(--header-h); }

.brand { display: flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 18px;
  box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-weight: 800; color: var(--ink); font-size: 16.5px; letter-spacing: -.2px; }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: .3px; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.nav a {
  display: block; padding: 9px 13px; border-radius: 9px; color: var(--text);
  font-size: 14.5px; font-weight: 500; white-space: nowrap;
}
.nav a:hover { background: var(--soft); color: var(--primary-dark); }
.nav a[aria-current="page"] { color: var(--primary-dark); background: var(--soft); font-weight: 600; }
.nav .nav-cta {
  margin-left: 8px; background: var(--primary); color: #fff !important; font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.nav .nav-cta:hover { background: var(--primary-dark); }

.nav-toggle {
  display: none; margin-left: auto; width: 44px; height: 40px; border: 1px solid var(--line);
  background: #fff; border-radius: 10px; cursor: pointer; padding: 0; position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  position: absolute; left: 50%; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transform: translateX(-50%); content: ""; transition: .2s ease;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

@media (max-width: 1000px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; align-items: stretch; gap: 2px; padding: 10px 16px 18px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; font-size: 15px; }
  .nav .nav-cta { margin: 8px 0 0; text-align: center; }
}

/* ---------------------------------------------------------------- 通用区块 */
.section { padding: 72px 0; }
.section.soft { background: var(--soft); }
.section.tight { padding: 48px 0; }
.section-head { max-width: 760px; margin: 0 auto 40px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head .eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 1.6px;
  text-transform: uppercase; color: var(--primary); background: var(--soft);
  padding: 5px 12px; border-radius: 20px; margin-bottom: 14px;
}
.section-head p { color: var(--muted); font-size: 16px; margin: 0; }
.section-head h2 { margin-bottom: 12px; }

/* ---------------------------------------------------------------- Hero */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--accent) 130%);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, .16) 1px, transparent 1px);
  background-size: 26px 26px; opacity: .5; pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; padding: 84px 0 88px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; }
.hero-home .hero-inner { grid-template-columns: 1fr; text-align: center; max-width: 900px; margin: 0 auto; }
.hero-home .hero-actions { justify-content: center; }
.hero h1 { color: #fff; margin-bottom: 18px; }
.hero .lead { font-size: 17.5px; color: rgba(255, 255, 255, .9); max-width: 620px; margin-bottom: 24px; }
.hero-home .lead { margin-left: auto; margin-right: auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600;
  background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .26);
  padding: 6px 14px; border-radius: 30px; margin-bottom: 20px; color: #fff;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 28px; padding: 0; list-style: none; }
.hero-points li { font-size: 14.5px; color: rgba(255, 255, 255, .92); display: flex; align-items: center; gap: 8px; margin: 0; }
.hero-points li::before { content: "✓"; font-weight: 700; color: #fff; background: rgba(255, 255, 255, .2); width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; }
.hero-figure { position: relative; z-index: 2; }
.hero-figure img { border-radius: 16px; box-shadow: var(--shadow-lg); background: #fff; }
.hero-home .hero-figure { max-width: 940px; margin: 46px auto 0; }

/* ---------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 11px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .18s ease; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-ghost { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn-ghost:hover { background: rgba(255, 255, 255, .24); color: #fff; }
.btn-outline { background: #fff; color: var(--primary-dark); border-color: var(--line); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 15px 32px; font-size: 16px; }

/* ---------------------------------------------------------------- 网格与卡片 */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 980px) { .g3, .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .g2, .g3, .g4 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm); transition: .2s ease; height: 100%;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #cbd8ea; }
.card h3 { margin-bottom: 10px; font-size: 17.5px; }
.card p { color: var(--muted); font-size: 14.5px; margin: 0; }
.card .icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff;
  font-weight: 700; font-size: 17px; margin-bottom: 16px;
}
.card-accent { border-top: 3px solid var(--primary); }
.card ul { margin: 10px 0 0; padding-left: 1.1em; color: var(--muted); font-size: 14px; }

/* 特色图文区块：图在上、文在下，避免架构图在窄列中被压缩 */
.card-row { display: block; max-width: 920px; margin: 0 auto; }
.card-row + hr { max-width: 920px; margin: 44px auto; }
.card-row-media { margin-bottom: 26px; }
.card-row-media img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff; }
.card-row-body { max-width: 860px; }
.card-row-body h2 { margin-bottom: 14px; }
.card-row-body p { color: var(--text); }

/* ---------------------------------------------------------------- 数据指标 */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
@media (max-width: 860px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .stats { grid-template-columns: 1fr; } }
.stat {
  background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm); padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.stat:nth-child(even) { border-left-color: var(--accent); }
.stat .value { font-size: 30px; font-weight: 800; color: var(--ink); line-height: 1.2; letter-spacing: -1px; }
.stat .label { font-size: 13.5px; color: var(--muted); margin-top: 4px; }
.stat .note { font-size: 12px; color: var(--ok); margin-top: 6px; }

/* ---------------------------------------------------------------- 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-sm); }
table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: 14.5px; }
caption { caption-side: top; text-align: left; padding: 16px 20px 0; color: var(--muted); font-size: 13.5px; }
th, td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--soft); color: var(--ink); font-weight: 700; font-size: 13.5px; letter-spacing: .2px; white-space: nowrap; }
tbody tr:hover { background: #fbfdff; }
tbody tr:last-child td { border-bottom: 0; }
td.yes { color: var(--ok); font-weight: 600; }
td.no { color: #b91c1c; }

/* ---------------------------------------------------------------- 步骤 */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { position: relative; padding: 22px 24px 22px 78px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 22px; top: 22px; width: 38px; height: 38px; border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff;
  display: grid; place-items: center; font-size: 14px; font-weight: 700;
}
.step h3 { font-size: 16.5px; margin-bottom: 6px; }
.step p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------------------------------------------------------------- 时间轴 */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline-item { position: relative; padding-bottom: 26px; }
.timeline-item::before {
  content: ""; position: absolute; left: -28px; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 4px solid var(--primary);
}
.timeline-item .year { font-size: 13px; font-weight: 700; color: var(--primary); letter-spacing: .5px; }
.timeline-item h3 { font-size: 16.5px; margin: 4px 0 6px; }
.timeline-item p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------------------------------------------------------------- 列表样式 */
.ticks { list-style: none; padding: 0; margin: 0; }
.ticks li { position: relative; padding-left: 28px; margin-bottom: .6em; color: var(--text); }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 2px; width: 18px; height: 18px; border-radius: 50%;
  background: rgba(29, 78, 216, .1); color: var(--primary); font-size: 11px; font-weight: 700;
  display: grid; place-items: center;
}
.quote {
  border-left: 4px solid var(--primary); background: var(--soft); padding: 22px 26px;
  border-radius: 0 var(--radius) var(--radius) 0; font-size: 16px; color: var(--ink); font-style: normal;
}
.quote footer { margin-top: 12px; font-size: 13.5px; color: var(--muted); }

/* ---------------------------------------------------------------- FAQ */
.faq { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; box-shadow: var(--shadow-sm); }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: 0; }
.faq summary {
  cursor: pointer; padding: 18px 24px; font-weight: 600; color: var(--ink); font-size: 15.5px;
  list-style: none; position: relative; padding-right: 54px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%);
  font-size: 20px; color: var(--primary); font-weight: 400; transition: .2s ease;
}
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { background: var(--soft); }
.faq .faq-body { padding: 4px 24px 20px; color: var(--muted); font-size: 14.8px; }

/* ---------------------------------------------------------------- 标签 */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; padding: 0; list-style: none; }
.tags li { margin: 0; }
.tags a, .tag {
  display: inline-block; font-size: 12.5px; font-weight: 600; color: var(--primary-dark);
  background: var(--soft); border: 1px solid var(--line); padding: 5px 13px; border-radius: 20px;
}
.tags a:hover, .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------------------------------------------------------------- Logo 墙 */
.logo-wall { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 900px) { .logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 560px) { .logo-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.logo-item {
  display: grid; place-items: center; height: 74px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-sm); color: var(--muted); font-weight: 600; font-size: 13.5px;
  text-align: center; padding: 8px; box-shadow: var(--shadow-sm);
}

/* ---------------------------------------------------------------- 图文列表 */
.media-list { display: grid; gap: 26px; }
.media-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
}
.media-item > img {
  border-radius: var(--radius-sm); border: 1px solid var(--line);
  margin-bottom: 22px; background: #fff;
}
.media-item .media-body { max-width: 940px; }
.media-item h3 { font-size: 18.5px; margin-bottom: 10px; }
.media-item p { color: var(--muted); font-size: 15px; margin: 0 0 12px; }
.media-item .ticks { font-size: 14.5px; }

/* ---------------------------------------------------------------- 文章列表 */
.post-list { display: grid; gap: 16px; }
.post {
  display: grid; grid-template-columns: 96px 1fr; gap: 22px; padding: 22px 24px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); transition: .2s ease;
}
.post:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: #cbd8ea; }
.post .date { text-align: center; border-right: 1px solid var(--line); padding-right: 12px; }
.post .date .d { font-size: 24px; font-weight: 800; color: var(--primary); line-height: 1.1; }
.post .date .m { font-size: 12.5px; color: var(--muted); }
.post h3 { font-size: 17.5px; margin-bottom: 8px; }
.post h3 a { color: var(--ink); }
.post h3 a:hover { color: var(--primary); }
.post p { margin: 0; color: var(--muted); font-size: 14.5px; }
.post .meta { margin-top: 10px; font-size: 12.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 14px; }
@media (max-width: 640px) { .post { grid-template-columns: 1fr; } .post .date { border-right: 0; display: flex; gap: 8px; align-items: baseline; justify-content: flex-start; } }

/* ---------------------------------------------------------------- 内页头图 */
.page-head {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 70%, var(--accent) 140%);
  color: #fff; padding: 56px 0 52px; position: relative; overflow: hidden;
}
.page-head::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, .14) 1px, transparent 1px);
  background-size: 24px 24px; opacity: .55;
}
.page-head .wrap { position: relative; z-index: 2; }
.page-head h1 { color: #fff; font-size: clamp(24px, 3.2vw, 34px); margin-bottom: 12px; }
.page-head p { color: rgba(255, 255, 255, .9); max-width: 760px; margin: 0; font-size: 16px; }
.breadcrumb { font-size: 13px; color: rgba(255, 255, 255, .78); margin-bottom: 14px; }
.breadcrumb a { color: rgba(255, 255, 255, .92); }
.breadcrumb span { margin: 0 7px; opacity: .6; }

/* 正文排版 */
.prose { max-width: 880px; }
.prose h2 { margin-top: 2.2em; padding-bottom: .35em; border-bottom: 1px solid var(--line); }
.prose h3 { margin-top: 1.7em; }
.prose > h2:first-child, .prose > h3:first-child { margin-top: 0; }
.prose figure { margin: 28px 0; }
.prose figure img { border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); background: #fff; }
.prose figcaption { font-size: 13.5px; color: var(--muted); text-align: center; margin-top: 10px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
/* 侧栏 + 正文：使用 minmax(0,1fr) 防止宽表格/长串撑破栅格 */
.layout-side { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 44px; align-items: start; }
.layout-side .prose { max-width: none; }
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; gap: 26px; }
  .layout-side { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .layout-side .side-nav { position: static; display: none; }
}
.side-nav { position: sticky; top: calc(var(--header-h) + 20px); }
.side-nav h4 { font-size: 13px; letter-spacing: 1px; color: var(--muted); text-transform: uppercase; margin-bottom: 12px; }
.side-nav ul { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--line); }
.side-nav li { margin: 0; }
.side-nav a { display: block; padding: 8px 14px; font-size: 14.5px; color: var(--text); border-left: 2px solid transparent; margin-left: -2px; }
.side-nav a:hover { color: var(--primary); }
.side-nav a[aria-current="page"] { color: var(--primary-dark); border-left-color: var(--primary); font-weight: 600; background: var(--soft); }

/* ---------------------------------------------------------------- 表单 */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.field input, .field select, .field textarea {
  font-family: inherit; font-size: 15px; color: var(--ink); padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fbfdff; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(29, 78, 216, .28); border-color: var(--primary); background: #fff; }
.field textarea { min-height: 130px; resize: vertical; }
.field .hint { font-size: 12.5px; color: var(--muted); }
.form-note { font-size: 13px; color: var(--muted); margin-top: 14px; }

/* 联系信息块 */
.info-list { display: grid; gap: 18px; }
.info-item { display: flex; gap: 14px; align-items: flex-start; }
.info-item .k { width: 78px; flex: 0 0 auto; color: var(--muted); font-size: 14px; }
.info-item .v { color: var(--ink); font-weight: 600; font-size: 14.5px; }

/* ---------------------------------------------------------------- CTA */
.cta-band {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--accent) 130%);
  color: #fff; border-radius: 20px; padding: 46px 48px; display: flex; flex-wrap: wrap;
  gap: 26px; align-items: center; justify-content: space-between; box-shadow: var(--shadow);
}
.cta-band h2 { color: #fff; margin-bottom: 8px; font-size: clamp(20px, 2.4vw, 26px); }
.cta-band p { color: rgba(255, 255, 255, .9); margin: 0; max-width: 620px; }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; }
@media (max-width: 640px) { .cta-band { padding: 30px 24px; } }

/* ---------------------------------------------------------------- 页脚 */
.site-footer { background: #0b1220; color: #94a3b8; margin-top: 0; padding: 56px 0 0; font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 34px; padding-bottom: 40px; }
@media (max-width: 900px) { .footer-top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-top { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; letter-spacing: .3px; }
.site-footer a { color: #94a3b8; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 10px; }
.footer-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 16px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-sub { color: #7d8ca3; }
.footer-about { color: #8494ab; font-size: 13.5px; line-height: 1.8; max-width: 340px; }
.footer-bottom {
  border-top: 1px solid #1e293b; padding: 22px 0 26px; display: flex; flex-wrap: wrap;
  gap: 10px 22px; align-items: center; justify-content: space-between; font-size: 13px; color: #7d8ca3;
}
.footer-bottom .legal { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
.footer-bottom .legal a { color: #94a3b8; }
.footer-bottom .legal a:hover { color: #fff; }
.icp { display: inline-flex; align-items: center; gap: 7px; color: #a8b6ca; }
.icp a { color: #cbd5e1; text-decoration: none; border-bottom: 1px dashed #475569; }
.icp a:hover { color: #fff; border-bottom-color: #94a3b8; }
.icp-badge {
  display: inline-grid; place-items: center; width: 15px; height: 15px; border-radius: 3px;
  background: #1e293b; color: #94a3b8; font-size: 9px; font-weight: 700;
}

/* ---------------------------------------------------------------- 返回顶部 */
.to-top {
  position: fixed; right: 22px; bottom: 26px; width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary); color: #fff; border: 0; cursor: pointer; display: none;
  place-items: center; box-shadow: var(--shadow); z-index: 90; font-size: 18px;
}
.to-top.show { display: grid; }

/* ---------------------------------------------------------------- 提示条 */
.alert {
  border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px; font-size: 14.5px; color: var(--text); margin: 0 0 20px;
}
.alert strong { color: var(--ink); }
.notice-demo {
  background: #fffbeb; border: 1px solid #fde68a; color: #92400e; border-radius: var(--radius-sm);
  padding: 12px 18px; font-size: 13.5px; margin-bottom: 18px;
}

@media print {
  .site-header, .site-footer, .to-top, .cta-band { display: none; }
  body { font-size: 12pt; }
}