/* ==========================================================================
   经纬互联 · 营销型官网样式
   移动端优先 · 营销转化导向 · 浅色主题
   ========================================================================== */

:root {
  --c-primary: #0B5FFF;
  --c-primary-dark: #0847C4;
  --c-primary-light: #E8F0FF;
  --c-accent: #FF7A00;
  --c-accent-light: #FFF3E8;
  --c-ink: #0F172A;
  --c-text: #1E293B;
  --c-text-2: #475569;
  --c-text-3: #64748B;
  --c-line: #E2E8F0;
  --c-bg: #FFFFFF;
  --c-bg-soft: #F8FAFC;
  --c-bg-mute: #F1F5F9;
  --c-success: #10B981;
  --c-danger: #EF4444;
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow: 0 4px 16px rgba(15, 23, 42, .08);
  --shadow-lg: 0 12px 40px rgba(11, 95, 255, .13);
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ---------- 布局容器 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 56px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--mute { background: var(--c-bg-mute); }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px; gap: 12px;
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 19px; color: var(--c-ink); letter-spacing: -.3px; }
.logo__mark {
  width: 34px; height: 34px; border-radius: 10px; flex: 0 0 34px;
  background: linear-gradient(135deg, var(--c-primary), #4D8DFF);
  color: #fff; display: grid; place-items: center;
  font-size: 14px; font-weight: 800; letter-spacing: -.5px;
  box-shadow: 0 4px 12px rgba(11, 95, 255, .3);
}
.logo__sub { display: block; font-size: 11px; font-weight: 500; color: var(--c-text-3); letter-spacing: 0; line-height: 1.2; }

.nav { display: none; }
.nav a {
  padding: 8px 13px; border-radius: 8px; font-size: 15px;
  color: var(--c-text-2); font-weight: 500; transition: .18s;
}
.nav a:hover, .nav a.is-active { color: var(--c-primary); background: var(--c-primary-light); }

/* 移动端隐藏顶部 CTA 按钮（提高选择器权重，避免被 .btn 的 display 覆盖） */
.header .header__cta { display: none; }

.burger {
  display: grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--c-line); border-radius: 10px; background: #fff;
  cursor: pointer; flex: 0 0 40px;
}
.burger span { display: block; width: 17px; height: 2px; background: var(--c-ink); border-radius: 2px; position: relative; }
.burger span::before, .burger span::after {
  content: ''; position: absolute; left: 0; width: 17px; height: 2px; background: var(--c-ink); border-radius: 2px;
}
.burger span::before { top: -5px; }
.burger span::after { top: 5px; }

.mobile-nav {
  display: none; border-top: 1px solid var(--c-line); background: #fff;
  padding: 8px 0 16px;
}
.mobile-nav.is-open { display: block; }
.mobile-nav a {
  display: block; padding: 13px 20px; font-size: 16px;
  color: var(--c-text); font-weight: 500; border-bottom: 1px solid var(--c-bg-mute);
}
.mobile-nav a:last-child { border-bottom: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 13px 24px; border-radius: 10px; font-size: 15.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .2s;
  font-family: inherit; line-height: 1.2; text-align: center;
}
.btn--primary {
  background: linear-gradient(135deg, var(--c-primary), #3D7DFF);
  color: #fff; box-shadow: 0 6px 18px rgba(11, 95, 255, .28);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(11, 95, 255, .36); }
.btn--ghost { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn--ghost:hover { background: var(--c-primary-light); }
.btn--light { background: #fff; color: var(--c-ink); border-color: var(--c-line); }
.btn--light:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn--block { width: 100%; }
.btn--lg { padding: 15px 30px; font-size: 16.5px; }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 52px 0 60px;
  background:
    radial-gradient(900px 420px at 88% -8%, rgba(11, 95, 255, .13), transparent 62%),
    radial-gradient(700px 380px at 4% 104%, rgba(255, 122, 0, .09), transparent 60%),
    linear-gradient(180deg, #FBFDFF 0%, #FFFFFF 100%);
}
.hero__grid { display: grid; gap: 40px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--c-primary-light); color: var(--c-primary);
  padding: 7px 14px; border-radius: 100px; font-size: 13.5px; font-weight: 600;
  margin-bottom: 20px;
}
.hero__eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(11, 95, 255, .18);
}
.hero h1 {
  font-size: 30px; line-height: 1.32; font-weight: 800; color: var(--c-ink);
  letter-spacing: -.6px; margin-bottom: 18px;
}
.hero h1 em { font-style: normal; color: var(--c-primary); position: relative; white-space: nowrap; }
.hero h1 em::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 2px; height: 8px;
  background: rgba(11, 95, 255, .13); border-radius: 4px; z-index: -1;
}
.hero__lead { font-size: 16.5px; color: var(--c-text-2); margin-bottom: 26px; max-width: 560px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero__note { font-size: 13.5px; color: var(--c-text-3); display: flex; align-items: center; gap: 7px; }
.hero__note svg { flex: 0 0 16px; }

/* 首屏下方的案例图带（紧凑横排，不喧宾夺主） */
.hero__strip { margin-top: 46px; }
.hero__strip-head {
  display: flex; align-items: baseline; gap: 10px;
  margin-bottom: 14px; flex-wrap: wrap;
}
.hero__strip-title { font-size: 13px; font-weight: 700; color: var(--c-primary); letter-spacing: 1.2px; text-transform: uppercase; }
.hero__strip-note { font-size: 13px; color: var(--c-text-3); }
.hero__strip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.hero__strip-item {
  display: block; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--c-line); background: #fff;
  box-shadow: var(--shadow-sm); transition: .24s;
}
.hero__strip-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(11, 95, 255, .3); }
.hero__strip-item .media { aspect-ratio: 16 / 10; }
.hero__strip-item .media img { transition: transform .5s cubic-bezier(.2, .7, .3, 1); }
.hero__strip-item:hover .media img { transform: scale(1.05); }
.hero__strip-cap {
  padding: 9px 11px; font-size: 12.5px; font-weight: 600; color: var(--c-text);
  line-height: 1.45; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.hero__panel {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 22px; box-shadow: var(--shadow-lg);
}
.hero__panel-title { font-size: 14px; font-weight: 700; color: var(--c-ink); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.hero__panel-title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-success); box-shadow: 0 0 0 4px rgba(16, 185, 129, .15); }

.flow { display: grid; gap: 10px; }
.flow__row {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 8px;
  background: var(--c-bg-soft); border-radius: var(--radius-sm); padding: 11px 12px;
  border: 1px solid var(--c-line);
}
.flow__node {
  font-size: 12.5px; font-weight: 600; color: var(--c-text); text-align: center;
  background: #fff; border-radius: 7px; padding: 7px 6px; border: 1px solid var(--c-line);
  line-height: 1.35;
}
.flow__node--hl { background: var(--c-primary-light); color: var(--c-primary); border-color: rgba(11, 95, 255, .25); }
.flow__arrow { color: var(--c-primary); font-size: 15px; font-weight: 700; }

/* ---------- 数据条 ---------- */
.stats { border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); background: #fff; }
.stats__grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.stat { padding: 22px 10px; text-align: center; border-right: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.stat:nth-child(2n) { border-right: 0; }
.stat:nth-child(n+3) { border-bottom: 0; }
.stat__value { font-size: 27px; font-weight: 800; color: var(--c-primary); letter-spacing: -.8px; line-height: 1.1; }
.stat__label { font-size: 13px; color: var(--c-text-3); margin-top: 4px; }

/* ---------- 区块标题 ---------- */
.sec-head { margin-bottom: 30px; }
.sec-head--center { text-align: center; }
.sec-head__eyebrow {
  font-size: 13px; font-weight: 700; color: var(--c-primary);
  letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 10px;
}
.sec-head h2 {
  font-size: 24px; font-weight: 800; color: var(--c-ink);
  letter-spacing: -.4px; line-height: 1.36; margin-bottom: 12px;
}
.sec-head p { color: var(--c-text-2); font-size: 15.5px; max-width: 660px; }
.sec-head--center p { margin-left: auto; margin-right: auto; }

/* ---------- 痛点卡片 ---------- */
.pain-grid { display: grid; gap: 14px; }
.pain-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 20px; display: flex; gap: 14px; align-items: flex-start;
  transition: .22s; box-shadow: var(--shadow-sm);
}
.pain-card:hover { border-color: rgba(11, 95, 255, .4); box-shadow: var(--shadow); transform: translateY(-2px); }
.pain-card__icon {
  flex: 0 0 40px; width: 40px; height: 40px; border-radius: 11px;
  background: var(--c-accent-light); display: grid; place-items: center;
  font-size: 19px;
}
.pain-card__title { font-size: 16px; font-weight: 700; color: var(--c-ink); margin-bottom: 5px; line-height: 1.5; }
.pain-card__desc { font-size: 14.5px; color: var(--c-text-2); line-height: 1.7; }

/* ==========================================================================
   图片 / 媒体（有图与无图都能优雅呈现）
   --------------------------------------------------------------------------
   原则：
   1. 图片字段为空时，模板不渲染 .media 容器，卡片自然回退为纯文字版式，
      不会留下空白占位。
   2. 所有图片固定 aspect-ratio，避免加载时页面跳动（CLS）。
   3. 卡片图懒加载，详情页首图立即加载并提权（LCP）。
   ========================================================================== */
.media {
  position: relative; display: block; overflow: hidden;
  background: linear-gradient(135deg, #E8F0FF, #F1F5F9);
}
.media img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 图片加载失败时的降级：隐藏破图图标，保留渐变底 */
.media--fallback::after {
  content: attr(data-fallback);
  position: absolute; inset: 0;
  display: grid; place-items: center; text-align: center; padding: 20px;
  font-size: 14px; font-weight: 600; color: var(--c-text-3); line-height: 1.6;
}

/* 卡片缩略图（16:10） */
.media--card { aspect-ratio: 16 / 10; border-bottom: 1px solid var(--c-line); }
.media--card img { transition: transform .5s cubic-bezier(.2, .7, .3, 1); }
.case-card:hover .media--card img,
.sol-card:hover .media--card img { transform: scale(1.045); }

/* 详情页首图（21:9 横幅，桌面更显气势） */
.media--hero {
  aspect-ratio: 16 / 9; border-radius: var(--radius-lg);
  border: 1px solid var(--c-line); box-shadow: var(--shadow);
  margin-bottom: 30px;
}
.media--hero img { aspect-ratio: 16 / 9; }

/* 详情页内嵌图 */
.media--inline {
  aspect-ratio: 16 / 10; border-radius: var(--radius);
  border: 1px solid var(--c-line); margin: 22px 0;
}

/* 图片说明文字 */
.media__cap {
  font-size: 13px; color: var(--c-text-3); text-align: center;
  margin-top: 10px; line-height: 1.6;
}

/* 无图时的版式补偿：卡片首块多留一点上边距 */
.case-card--noimg .case-card__head { padding-top: 24px; }
.sol-card--noimg { padding-top: 26px; }

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; gap: 18px; }
.case-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; transition: .24s; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
}
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: rgba(11, 95, 255, .32); }
.case-card__head { padding: 22px 22px 0; }
.case-card__cat {
  display: inline-block; font-size: 12px; font-weight: 700; color: var(--c-primary);
  background: var(--c-primary-light); padding: 4px 10px; border-radius: 6px; margin-bottom: 12px;
}
.case-card__title { font-size: 19px; font-weight: 800; color: var(--c-ink); line-height: 1.42; margin-bottom: 8px; letter-spacing: -.3px; }
.case-card__sub { font-size: 13.5px; color: var(--c-text-3); margin-bottom: 13px; }
.case-card__body { padding: 0 22px; flex: 1; }
.case-card__summary { font-size: 14.5px; color: var(--c-text-2); line-height: 1.72; }
.case-card__tags { padding: 16px 22px 0; display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-size: 12px; color: var(--c-text-2); background: var(--c-bg-mute);
  padding: 4px 9px; border-radius: 6px; font-weight: 500;
}
.case-card__foot { padding: 16px 22px 20px; }
.case-card__link { font-size: 14.5px; font-weight: 700; color: var(--c-primary); display: inline-flex; align-items: center; gap: 5px; }
.case-card__link::after { content: '→'; transition: .2s; }
.case-card:hover .case-card__link::after { transform: translateX(4px); }

/* ---------- 解决方案卡 ---------- */
.sol-grid { display: grid; gap: 16px; }
.sol-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 24px; transition: .24s; box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
}
/* 带图的方案卡：内边距归零，由媒体块自己撑开 */
.sol-card--img { padding: 0; display: flex; flex-direction: column; }
.sol-card--img .sol-card__inner { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.sol-card--img .sol-card__link { margin-top: auto; }
.sol-card::before {
  content: ''; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: linear-gradient(180deg, var(--c-primary), #6BA0FF);
  opacity: 0; transition: .24s; z-index: 2;
}
.sol-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: rgba(11, 95, 255, .3); }
.sol-card:hover::before { opacity: 1; }
.sol-card__num { font-size: 12px; font-weight: 800; color: var(--c-primary); letter-spacing: 1.2px; margin-bottom: 10px; }
.sol-card__title { font-size: 18.5px; font-weight: 800; color: var(--c-ink); margin-bottom: 10px; letter-spacing: -.3px; }
.sol-card__desc { font-size: 14.5px; color: var(--c-text-2); line-height: 1.72; margin-bottom: 16px; }
.sol-card__link { font-size: 14px; font-weight: 700; color: var(--c-primary); }
.sol-card__link::after { content: ' →'; }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; gap: 16px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 22px 22px 22px 24px; position: relative; box-shadow: var(--shadow-sm);
}
.step__num {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: var(--c-primary); color: #fff; font-size: 14px; font-weight: 800; margin-bottom: 13px;
}
.step__title { font-size: 16.5px; font-weight: 700; color: var(--c-ink); margin-bottom: 7px; }
.step__desc { font-size: 14.5px; color: var(--c-text-2); line-height: 1.72; }

/* ---------- 能力标签云 ---------- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
.tag-cloud span {
  font-size: 14px; font-weight: 600; color: var(--c-text);
  background: #fff; border: 1px solid var(--c-line);
  padding: 9px 15px; border-radius: 100px; transition: .2s;
}
.tag-cloud span:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-light); }

/* ---------- 案例 / 方案详情页 ---------- */
/* 移动端优先：默认单栏，正文占满（与列表页同宽） */
.detail-layout { display: block; }
.detail-side { display: none; }
.article { min-width: 0; }
.side-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.side-card__title {
  font-size: 14px; font-weight: 800; color: var(--c-ink);
  margin-bottom: 12px; letter-spacing: -.2px;
}
.side-card__list { display: grid; gap: 10px; }
.side-card__list li {
  position: relative; padding-left: 20px;
  font-size: 14px; color: var(--c-text-2); line-height: 1.65;
}
.side-card__list li::before {
  content: ''; position: absolute; left: 2px; top: 8px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--c-primary);
}
.side-card__meta { display: grid; gap: 9px; }
.side-card__meta div { font-size: 14px; color: var(--c-text-2); line-height: 1.6; }
.side-card__meta span { color: var(--c-text-3); }
.side-card--cta {
  background: linear-gradient(140deg, #0B5FFF, #2E7BFF 60%, #4D8DFF);
  border: 0; color: #fff; box-shadow: 0 10px 30px rgba(11, 95, 255, .28);
}
.side-card--cta .side-card__title { color: #fff; }
.side-card--cta p { font-size: 14px; color: rgba(255, 255, 255, .92); line-height: 1.72; margin-bottom: 14px; }
.side-card--cta .btn { width: 100%; justify-content: center; }
.side-card__phone {
  display: block; text-align: center; margin-top: 12px;
  font-size: 17px; font-weight: 800; color: #fff; letter-spacing: .4px;
}
.breadcrumb { font-size: 13.5px; color: var(--c-text-3); margin-bottom: 20px; }
.breadcrumb a { color: var(--c-text-3); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span { margin: 0 7px; color: var(--c-line); }

.article__header { padding-bottom: 26px; border-bottom: 1px solid var(--c-line); margin-bottom: 30px; }
.article__cat {
  display: inline-block; font-size: 12.5px; font-weight: 700; color: var(--c-primary);
  background: var(--c-primary-light); padding: 5px 12px; border-radius: 7px; margin-bottom: 15px;
}
.article h1 { font-size: 27px; font-weight: 800; color: var(--c-ink); line-height: 1.36; letter-spacing: -.5px; margin-bottom: 12px; }
.article__sub { font-size: 16px; color: var(--c-text-3); margin-bottom: 18px; }
.article__meta { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 13.5px; color: var(--c-text-3); }

.article__body h2 {
  font-size: 20px; font-weight: 800; color: var(--c-ink);
  margin: 34px 0 15px; letter-spacing: -.3px;
  padding-left: 13px; border-left: 4px solid var(--c-primary); line-height: 1.45;
}
.article__body h2:first-child { margin-top: 0; }
.article__body h3 { font-size: 16.5px; font-weight: 700; color: var(--c-ink); margin: 22px 0 10px; }
.article__body p { font-size: 16px; color: var(--c-text); line-height: 1.85; margin-bottom: 15px; }
.article__body ul { margin: 0 0 18px; display: grid; gap: 10px; }
.article__body ul li {
  position: relative; padding-left: 26px; font-size: 15.5px;
  color: var(--c-text); line-height: 1.78;
}
.article__body ul li::before {
  content: ''; position: absolute; left: 6px; top: 11px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-light);
}

/* 详情页首图（放在标题下方，占满内容宽度） */
.article__cover { margin: 0 0 30px; }
.article__cover .media--hero { margin-bottom: 0; }

/* 详情页图集（可选多图） */
.article__gallery { display: grid; gap: 14px; margin: 26px 0; }
.article__gallery figure { margin: 0; }
.article__gallery .media--inline { margin: 0; }

/* 详情页导语（首屏摘要，标题下方） */
.article__summary {
  font-size: 16.5px; color: var(--c-text-2); line-height: 1.8;
  padding: 0 0 26px; margin: 0 0 30px;
  border-bottom: 1px solid var(--c-line);
}

/* 正文开场白：直接对访客说话，字号略大、颜色略深 */
.article__lead {
  background: linear-gradient(135deg, #F7FAFF, #F1F7FF);
  border: 1px solid rgba(11, 95, 255, .14);
  border-left: 4px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 22px 24px; margin: 0 0 30px;
}
.article__lead p { font-size: 16.5px; color: var(--c-text); line-height: 1.9; margin-bottom: 14px; }
.article__lead p:last-child { margin-bottom: 0; }

/* 痛点清单：换成"!"标记，视觉上更像"对照自查" */
.article__body ul.check-list { margin: 0 0 18px; display: grid; gap: 11px; }
.article__body ul.check-list li { position: relative; padding-left: 30px; font-size: 15.5px; color: var(--c-text); line-height: 1.78; }
.article__body ul.check-list li::before {
  content: '!'; position: absolute; left: 0; top: 3px;
  width: 19px; height: 19px; border-radius: 6px;
  display: grid; place-items: center;
  background: #FFF1E6; color: #D97706;
  font-size: 12px; font-weight: 800; box-shadow: none;
}

/* 结果清单：换成对勾标记 */
.article__body ul.result-list { margin: 0 0 18px; display: grid; gap: 11px; }
.article__body ul.result-list li { position: relative; padding-left: 30px; font-size: 15.5px; color: var(--c-text); line-height: 1.78; }
.article__body ul.result-list li::before {
  content: '✓'; position: absolute; left: 0; top: 3px;
  width: 19px; height: 19px; border-radius: 6px;
  display: grid; place-items: center;
  background: var(--c-primary-light); color: var(--c-primary);
  font-size: 12px; font-weight: 800; box-shadow: none;
}

/* 交付清单网格 */
.deliver-grid { display: grid; gap: 12px; margin: 0 0 18px; }
.deliver-item {
  display: flex; align-items: flex-start; gap: 13px;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-sm);
  padding: 15px 17px; box-shadow: var(--shadow-sm); transition: .2s;
}
.deliver-item:hover { border-color: rgba(11, 95, 255, .32); box-shadow: var(--shadow-lg); }
.deliver-item__num {
  flex: 0 0 auto; display: grid; place-items: center; width: 26px; height: 26px;
  border-radius: 8px; background: var(--c-primary); color: #fff;
  font-size: 13px; font-weight: 800; line-height: 1; margin-top: 1px;
}
.deliver-item__text { font-size: 15px; color: var(--c-text); line-height: 1.68; }

/* 补充说明（弱化呈现） */
.article__note {
  background: var(--c-bg-soft); border-radius: var(--radius);
  padding: 20px 22px; margin: 0 0 18px;
}
.article__note p { font-size: 15.5px; color: var(--c-text-2); line-height: 1.85; margin-bottom: 13px; }
.article__note p:last-child { margin-bottom: 0; }

.callout {
  background: linear-gradient(135deg, #F4F8FF, #EDF4FF);
  border: 1px solid rgba(11, 95, 255, .18); border-radius: var(--radius);
  padding: 20px 22px; margin: 26px 0;
}
.callout__label { font-size: 13px; font-weight: 800; color: var(--c-primary); letter-spacing: .6px; margin-bottom: 9px; }
.callout p { margin-bottom: 0; font-size: 15.5px; }

.quote {
  border-left: 3px solid var(--c-primary); background: var(--c-bg-soft);
  padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0; font-size: 15.5px; color: var(--c-text-2); line-height: 1.8;
}

/* ---------- CTA 区块 ---------- */
.cta-band {
  background: linear-gradient(135deg, #0B5FFF 0%, #1E6BFF 55%, #4D8DFF 100%);
  border-radius: var(--radius-lg); padding: 38px 26px; color: #fff;
  position: relative; overflow: hidden; text-align: center;
}
.cta-band::before {
  content: ''; position: absolute; width: 320px; height: 320px; border-radius: 50%;
  background: rgba(255, 255, 255, .09); top: -140px; right: -90px;
}
.cta-band::after {
  content: ''; position: absolute; width: 200px; height: 200px; border-radius: 50%;
  background: rgba(255, 255, 255, .07); bottom: -110px; left: -50px;
}
.cta-band__inner { position: relative; z-index: 1; }
.cta-band h2 { font-size: 23px; font-weight: 800; margin-bottom: 12px; letter-spacing: -.4px; line-height: 1.4; }
.cta-band p { font-size: 15.5px; opacity: .93; margin-bottom: 24px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-band .btn--light { box-shadow: 0 8px 22px rgba(0, 0, 0, .15); }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* ---------- FAQ 手风琴 ---------- */
.faq-list { display: grid; gap: 11px; }
.faq-item {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-sm);
  overflow: hidden; transition: .2s;
}
.faq-item[open] { border-color: rgba(11, 95, 255, .35); box-shadow: var(--shadow); }
.faq-item summary {
  padding: 17px 20px; font-size: 16px; font-weight: 700; color: var(--c-ink);
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  line-height: 1.55;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; font-size: 21px; font-weight: 400; color: var(--c-primary);
  flex: 0 0 auto; transition: .2s; line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__a { padding: 0 20px 19px; font-size: 15px; color: var(--c-text-2); line-height: 1.82; }

/* ---------- 服务卡 ---------- */
.svc-grid { display: grid; gap: 14px; }
.svc-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); transition: .22s;
}
.svc-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: rgba(11, 95, 255, .3); }
.svc-card__top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 11px; }
.svc-card__title { font-size: 17px; font-weight: 800; color: var(--c-ink); }
.svc-card__badge {
  font-size: 11.5px; font-weight: 700; color: var(--c-accent);
  background: var(--c-accent-light); padding: 4px 9px; border-radius: 6px; white-space: nowrap;
}
.svc-card__desc { font-size: 14.5px; color: var(--c-text-2); line-height: 1.74; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; gap: 26px; }
.about-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.about-card h2 { font-size: 20px; font-weight: 800; color: var(--c-ink); margin-bottom: 14px; letter-spacing: -.3px; }
.about-card p { font-size: 15.5px; color: var(--c-text-2); line-height: 1.85; margin-bottom: 13px; }
.about-card p:last-child { margin-bottom: 0; }

.value-list { display: grid; gap: 13px; margin-top: 6px; }
.value-item { display: flex; gap: 12px; align-items: flex-start; }
.value-item__dot {
  flex: 0 0 22px; width: 22px; height: 22px; border-radius: 7px;
  background: var(--c-primary-light); color: var(--c-primary);
  display: grid; place-items: center; font-size: 12px; font-weight: 800; margin-top: 3px;
}
.value-item__text { font-size: 15px; color: var(--c-text); line-height: 1.72; }
.value-item__text strong { color: var(--c-ink); }

/* ---------- 系统对接矩阵表 ---------- */
.matrix { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius); border: 1px solid var(--c-line); background: #fff; }
.matrix table { width: 100%; border-collapse: collapse; min-width: 560px; }
.matrix th, .matrix td { padding: 13px 16px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--c-line); }
.matrix th { background: var(--c-bg-soft); font-weight: 700; color: var(--c-ink); white-space: nowrap; }
.matrix td { color: var(--c-text-2); }
.matrix tr:last-child td { border-bottom: 0; }
.matrix td:first-child { font-weight: 600; color: var(--c-ink); white-space: nowrap; }

/* ---------- 页脚 ---------- */
.footer { background: #0F172A; color: #CBD5E1; padding: 44px 0 26px; margin-top: 0; }
.footer__grid { display: grid; gap: 30px; }
.footer__brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 19px; color: #fff; margin-bottom: 13px; }
.footer__desc { font-size: 14px; color: #94A3B8; line-height: 1.78; max-width: 380px; margin-bottom: 18px; }
.footer__title { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 13px; }
.footer__links { display: grid; gap: 9px; }
.footer__links a { font-size: 14px; color: #94A3B8; transition: .18s; }
.footer__links a:hover { color: #fff; }
.footer__contact { display: grid; gap: 11px; }
.footer__contact-item { display: flex; gap: 10px; font-size: 14px; color: #94A3B8; line-height: 1.6; }
.footer__contact-item strong { color: #E2E8F0; font-weight: 600; }
.footer__bottom {
  margin-top: 34px; padding-top: 22px; border-top: 1px solid #1E293B;
  font-size: 13px; color: #64748B; display: grid; gap: 8px;
}
.footer__bottom a { color: #64748B; }
.footer__bottom a:hover { color: #94A3B8; }

/* ---------- 悬浮咨询条（移动端） ---------- */
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--c-line);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  display: flex; gap: 10px; align-items: center;
  box-shadow: 0 -4px 20px rgba(15, 23, 42, .07);
}
.sticky-cta__text { flex: 1; font-size: 13px; color: var(--c-text-2); line-height: 1.45; }
.sticky-cta__text strong { display: block; color: var(--c-ink); font-size: 14px; font-weight: 700; }
.sticky-cta .btn { padding: 11px 18px; font-size: 14.5px; flex: 0 0 auto; }

body.has-sticky { padding-bottom: 74px; }

/* ---------- 滚动出现动画（渐进增强：默认可见，JS 启用后才隐藏） ---------- */
.reveal { opacity: 1; transform: none; }

.js-enabled .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.js-enabled .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js-enabled .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   平板 ≥ 640px
   ========================================================================== */
@media (min-width: 640px) {
  .section { padding: 70px 0; }
  .hero { padding: 70px 0 78px; }
  .hero h1 { font-size: 38px; }
  .hero__lead { font-size: 17.5px; }
  .sec-head h2 { font-size: 29px; }
  .stat__value { font-size: 32px; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(4, 1fr); }
  .stat { border-bottom: 0; }
  .stat:nth-child(2n) { border-right: 1px solid var(--c-line); }
  .stat:last-child { border-right: 0; }
  .hero__strip-grid { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .article h1 { font-size: 32px; }
  .cta-band { padding: 50px 40px; }
  .cta-band h2 { font-size: 28px; }
  .footer__grid { grid-template-columns: 1.6fr 1fr 1.2fr; }
  .article__gallery { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   桌面 ≥ 900px
   ========================================================================== */
@media (min-width: 900px) {
  .header__inner { height: 70px; }
  .nav { display: flex; align-items: center; gap: 2px; }
  .header .header__cta { display: inline-flex; }
  .burger { display: none; }
  .mobile-nav { display: none !important; }

  .section { padding: 88px 0; }
  .hero { padding: 86px 0 96px; }
  .hero__grid { grid-template-columns: 1.12fr .88fr; align-items: center; gap: 56px; }
  .hero h1 { font-size: 46px; line-height: 1.24; }
  .hero__lead { font-size: 18px; }
  .sec-head h2 { font-size: 33px; }
  .sec-head { margin-bottom: 42px; }

  .pain-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .case-grid { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .sol-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .svc-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .article h1 { font-size: 37px; }
  .article__body h2 { font-size: 23px; }
  .about-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .cta-band { padding: 62px 56px; }
  .cta-band h2 { font-size: 32px; }

  .sticky-cta { display: none; }
  body.has-sticky { padding-bottom: 0; }

  /* 详情页双栏：正文 + 侧栏 = 1140px，与列表页左右边缘对齐 */
  .detail-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 44px;
    align-items: start;
  }
  .detail-side { display: grid; gap: 16px; position: sticky; top: 92px; }
}

/* ============ 分页导航 ============ */
.pager { display:flex; align-items:center; justify-content:center; gap:10px; flex-wrap:wrap; margin:28px 0 8px; }
.pager__btn { display:inline-flex; align-items:center; padding:9px 16px; border-radius:10px; border:1px solid var(--c-line, #E2E8F0); background:#fff; color:#1E293B; font-size:14px; font-weight:600; text-decoration:none; }
.pager__btn:hover:not(.is-disabled){ border-color:var(--c-primary, #0B5FFF); color:var(--c-primary, #0B5FFF); }
.pager__btn.is-disabled{ color:#CBD5E1; border-color:#F1F5F9; cursor:not-allowed; }
.pager__nums{ display:flex; gap:6px; overflow-x:auto; max-width:100%; -webkit-overflow-scrolling:touch; padding:2px; }
.pager__num{ min-width:38px; height:38px; display:inline-flex; align-items:center; justify-content:center; border-radius:10px; border:1px solid var(--c-line, #E2E8F0); background:#fff; color:#1E293B; font-size:14px; font-weight:600; text-decoration:none; }
.pager__num:hover:not(.is-current){ border-color:var(--c-primary, #0B5FFF); color:var(--c-primary, #0B5FFF); }
.pager__num.is-current{ background:var(--c-primary, #0B5FFF); border-color:var(--c-primary, #0B5FFF); color:#fff; }
@media (max-width:640px){ .pager{ gap:8px } .pager__nums{ max-width:62vw } }

/* ============ 日期标记 ============ */
.case-card__date { margin-top:8px; font-size:13px; color:#64748B; font-variant-numeric:tabular-nums; }
.article__date { color:var(--c-primary, #0B5FFF); font-weight:600; }
.faq-item__tag { display:inline-block; margin-left:10px; padding:2px 10px; border-radius:999px; font-size:12px; font-weight:600; background:#E0EDFF; color:#1D4ED8; vertical-align:middle; }
.faq-item__date { margin-top:10px; font-size:12px; color:#94A3B8; }

/* 打印 */
@media print {
  .header, .footer, .sticky-cta, .cta-band { display: none; }
  .article__body { font-size: 12pt; }
}