/* ============================================================================
   店领航 ERP 落地页 — 样式表
   设计令牌来源：ui-ux-pro-max design-system（sky 蓝色系 / Inter + 中文系统字体）
   原则：轻盈浅蓝、沉稳克制、简约专业；正文对比度 ≥ 4.5:1；动效 150–300ms
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  /* 品牌蓝阶 */
  --brand-50:  #F0F9FF;
  --brand-100: #E0F2FE;
  --brand-200: #BAE6FD;
  --brand-300: #7DD3FC;
  --brand-400: #38BDF8;
  --brand-500: #0EA5E9;
  --brand-600: #0284C7;
  --brand-700: #0369A1;
  --brand-800: #075985;
  --brand-900: #0C4A6E;

  /* 中性与文字 */
  --ink:        #0C4A6E;   /* 标题，深蓝 */
  --ink-body:   #1E5C86;   /* 正文 7.17:1 */
  --ink-muted:  #4A7695;   /* 次要文字 4.86:1 */
  --surface:    #FFFFFF;
  --surface-2:  #F7FBFE;
  --line:       #D7E7F2;
  --line-soft:  #E8F2F9;

  --success:    #0F8A5F;
  --warn:       #B45309;

  /* 字体：不引外部 CDN，国内访问稳定 */
  --font-sans: "Inter", "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont,
               "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;

  /* 间距与圆角 */
  --container: 1200px;
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 18px;

  --shadow-xs: 0 1px 2px rgba(12, 74, 110, .06);
  --shadow-sm: 0 2px 8px rgba(12, 74, 110, .06);
  --shadow-md: 0 8px 24px rgba(12, 74, 110, .08);
  --shadow-lg: 0 18px 48px rgba(12, 74, 110, .12);

  /* z-index 阶梯 */
  --z-header: 20;
  --z-topbar: 10;
  --z-panel: 30;
  --z-skip: 50;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px; /* 锚点跳转时避开吸顶导航 */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-body);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 0;
}

p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }

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

a {
  color: var(--brand-700);
  text-decoration: none;
  transition: color .2s var(--ease);
}
a:hover { color: var(--brand-600); }

/* 可见焦点环：键盘导航必须看得见 */
:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: var(--z-skip);
  padding: 10px 18px;
  background: var(--brand-700);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; color: #fff; }

.icon-sprite {
  position: absolute;
  width: 0; height: 0;
  overflow: hidden;
}

/* 线性描边图标 */
.ico {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -.18em;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow { max-width: 860px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .2s var(--ease), border-color .2s var(--ease),
              color .2s var(--ease), box-shadow .2s var(--ease);
}
.btn--lg { min-height: 50px; padding: 13px 28px; font-size: 16px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--brand-700);
  color: #fff;
  box-shadow: var(--shadow-xs);
}
.btn--primary:hover {
  background: var(--brand-800);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn--primary:active { background: var(--ink); }

.btn--outline {
  background: transparent;
  color: var(--brand-700);
  border-color: var(--brand-200);
}
.btn--outline:hover {
  background: var(--brand-50);
  border-color: var(--brand-400);
  color: var(--brand-800);
}

.btn--ghost {
  background: transparent;
  color: var(--ink-body);
}
.btn--ghost:hover { background: var(--brand-50); color: var(--brand-700); }

/* ---------- 顶部提示条 ---------- */
.topbar {
  position: relative;
  z-index: var(--z-topbar);
  background: var(--brand-900);
  color: #CDE9FB;
  font-size: 13px;
}
.topbar__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 38px;
  flex-wrap: wrap;
}
.topbar__note {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--brand-400), var(--brand-600));
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.brand__logo { width: 24px; height: 24px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__text strong { font-size: 17px; font-weight: 600; letter-spacing: -.01em; }
.brand__text small { font-size: 11.5px; color: var(--ink-muted); }

.nav { display: flex; align-items: center; gap: 20px; }
.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__list a {
  display: inline-block;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  color: var(--ink-body);
  font-size: 15px;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.nav__list a:hover { background: var(--brand-50); color: var(--brand-700); }
.nav__cta { display: flex; align-items: center; gap: 8px; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}
.nav-toggle .ico { width: 22px; height: 22px; }

/* ---------- 通用区块 ---------- */
.section {
  padding-block: 88px;
}
.section--tint {
  background: linear-gradient(180deg, var(--brand-50) 0%, var(--surface-2) 100%);
  border-block: 1px solid var(--line-soft);
}
.section__head {
  max-width: 720px;
  margin: 0 auto 52px;
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 13px;
  border-radius: 999px;
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  color: var(--brand-800);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .02em;
}
.section__title {
  font-size: clamp(26px, 3.4vw, 36px);
  margin-bottom: 16px;
}
.section__lead {
  color: var(--ink-body);
  font-size: 16.5px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: 72px;
  padding-bottom: 0;
  background:
    radial-gradient(1000px 460px at 78% -8%, var(--brand-100) 0%, rgba(224, 242, 254, 0) 62%),
    linear-gradient(180deg, var(--brand-50) 0%, var(--surface) 88%);
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 165, 233, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, .055) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(720px 420px at 50% 0%, #000 0%, transparent 78%);
  mask-image: radial-gradient(720px 420px at 50% 0%, #000 0%, transparent 78%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 52px;
  align-items: center;
  padding-bottom: 76px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 22px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--brand-200);
  color: var(--brand-800);
  font-size: 13.5px;
  box-shadow: var(--shadow-xs);
}
.eyebrow .ico { color: var(--brand-500); }

.hero__title {
  font-size: clamp(32px, 5.2vw, 52px);
  line-height: 1.22;
  letter-spacing: -.02em;
  margin-bottom: 22px;
}
.hero__title .hl {
  background: linear-gradient(100deg, var(--brand-600), var(--brand-800));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  font-size: 17px;
  max-width: 34em;
  margin-bottom: 26px;
}
.hero__points {
  display: grid;
  gap: 11px;
  margin-bottom: 32px;
}
.hero__points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15.5px;
  color: var(--ink-body);
}
.hero__points .ico {
  margin-top: 5px;
  color: var(--brand-600);
  stroke-width: 2.4;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}
.hero__hint {
  font-size: 13.5px;
  color: var(--ink-muted);
}

/* --- 产品界面示意 --- */
.hero__visual { position: relative; }
.mock {
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.mock__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line-soft);
}
.mock__dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--brand-200);
}
.mock__url {
  margin-left: 10px;
  font-size: 11.5px;
  color: var(--ink-muted);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 2px 12px;
}
.mock__body { padding: 18px; }
.mock__kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.kpi {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
}
.kpi__label { font-size: 11.5px; color: var(--ink-muted); }
.kpi__value { font-size: 18px; font-weight: 600; color: var(--ink); letter-spacing: -.01em; }
.kpi__trend { font-size: 11px; color: var(--ink-muted); }
.kpi__trend.up { color: var(--success); }
.kpi__trend.down { color: var(--warn); }

.mock__chart {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: var(--surface);
  margin-bottom: 14px;
}
.mock__chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--ink-body);
  margin-bottom: 12px;
}
.chip {
  font-size: 10.5px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--brand-50);
  color: var(--brand-700);
  border: 1px solid var(--brand-200);
}
.bars {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  height: 76px;
}
.bars i {
  flex: 1;
  height: var(--h);
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, var(--brand-300), var(--brand-500));
  opacity: .9;
}
.bars i:last-child { background: linear-gradient(180deg, var(--brand-500), var(--brand-700)); }

.mock__table {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.row {
  display: grid;
  grid-template-columns: 1.6fr .8fr .9fr;
  gap: 10px;
  padding: 9px 14px;
  font-size: 12.5px;
  align-items: center;
  border-bottom: 1px solid var(--line-soft);
}
.row:last-child { border-bottom: 0; }
.row--head {
  background: var(--surface-2);
  color: var(--ink-muted);
  font-size: 11.5px;
}
.tag {
  justify-self: start;
  font-size: 10.5px;
  padding: 2px 9px;
  border-radius: 999px;
}
.tag--ok { background: #E7F6EF; color: var(--success); }
.tag--wait { background: var(--brand-50); color: var(--brand-700); }

/* --- 平台条 --- */
.platforms {
  position: relative;
  padding-bottom: 62px;
  text-align: center;
}
.platforms__label {
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 18px;
}
.platforms__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.platforms__list li {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink-body);
  font-size: 14px;
}

/* ---------- 功能卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
.feature {
  display: flex;
  flex-direction: column;
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
  cursor: default;
}
.feature:hover {
  border-color: var(--brand-300);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.feature__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 11px;
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  color: var(--brand-600);
}
.feature__icon .ico { width: 21px; height: 21px; }
.feature h3 { font-size: 17px; margin-bottom: 9px; }
.feature p {
  font-size: 14.5px;
  color: var(--ink-body);
  margin-bottom: 16px;
  flex: 1;
}
.feature__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.feature__tags li {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  color: var(--ink-muted);
}

/* ---------- 流程 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  counter-reset: flow;
}
.flow__step {
  position: relative;
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
}
.flow__num {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--brand-600);
  background: var(--brand-50);
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: 14px;
}
.flow__step h3 { font-size: 17px; margin-bottom: 8px; }
.flow__step p { font-size: 14.5px; color: var(--ink-body); }

/* ---------- 优势 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
.adv { text-align: center; padding: 8px 12px; }
.adv__icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--brand-50), var(--brand-100));
  border: 1px solid var(--brand-200);
  color: var(--brand-700);
}
.adv__icon .ico { width: 23px; height: 23px; }
.adv h3 { font-size: 17px; margin-bottom: 8px; }
.adv p { font-size: 14.5px; color: var(--ink-body); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 52px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}
.stats li {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stats strong {
  font-size: clamp(26px, 3.2vw, 34px);
  font-weight: 600;
  color: var(--brand-800);
  letter-spacing: -.02em;
  line-height: 1.2;
}
.stats strong em {
  font-style: normal;
  font-size: .5em;
  font-weight: 500;
  margin-left: 2px;
  color: var(--brand-600);
}
.stats span { font-size: 13.5px; color: var(--ink-muted); }

/* ---------- 安全合规 ---------- */
.sec-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
.sec {
  padding: 24px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}
.sec__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 10px;
  background: var(--brand-50);
  color: var(--brand-700);
}
.sec__icon .ico { width: 20px; height: 20px; }
.sec h3 { font-size: 16.5px; margin-bottom: 8px; }
.sec p { font-size: 14.5px; color: var(--ink-body); }

/* ---------- 关于我们 ---------- */
.about {
  display: grid;
  grid-template-columns: 1.25fr .95fr;
  gap: 52px;
  align-items: start;
}
.about__copy p { margin-bottom: 18px; font-size: 15.5px; }
.about__copy .section__title { margin-bottom: 20px; }
.about__copy .section__eyebrow { margin-bottom: 12px; }
.about__card {
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
}
.about__card-title { font-size: 16px; margin-bottom: 18px; }
.deflist > div {
  padding: 11px 0;
  border-bottom: 1px dashed var(--brand-200);
}
.deflist > div:last-child { border-bottom: 0; padding-bottom: 0; }
.deflist dt { font-size: 12.5px; color: var(--ink-muted); margin-bottom: 3px; }
.deflist dd { font-size: 14.5px; color: var(--ink); font-weight: 500; overflow-wrap: anywhere; }

/* ---------- FAQ ---------- */
.faq {
  display: grid;
  gap: 12px;
}
.faq__item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.faq__item[open] {
  border-color: var(--brand-300);
  box-shadow: var(--shadow-sm);
}
.faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  font-size: 16px;
  font-weight: 500;
  min-height: 56px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary:hover { color: var(--brand-700); }
.faq__chev {
  flex: none;
  color: var(--brand-600);
  transition: transform .25s var(--ease);
}
.faq__item[open] .faq__chev { transform: rotate(180deg); }
.faq__answer { padding: 0 22px 20px; }
.faq__answer p { font-size: 14.5px; color: var(--ink-body); }

/* ---------- 预约演示 ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  max-width: 680px;
  margin-inline: auto;
}
.contact__copy { text-align: center; }
.contact__copy .section__title { margin-bottom: 14px; }
.contact__copy .section__eyebrow { margin-bottom: 12px; }
.contact__copy .section__lead { max-width: 32em; margin-inline: auto; }

.contact__form {
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}
.form__title { font-size: 18px; margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 7px;
}
.field label span { color: var(--brand-600); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 14px;
  min-height: 46px;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink-body);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field textarea { min-height: 92px; resize: vertical; line-height: 1.6; }
.field input::placeholder,
.field textarea::placeholder { color: #8AA9BF; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, .16);
}
.field input[aria-invalid="true"] {
  border-color: #DC2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, .12);
}
.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234A7695' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 38px;
}
.form__note {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--ink-muted);
  line-height: 1.6;
}
.form__status {
  margin-top: 10px;
  font-size: 14px;
  color: var(--success);
  min-height: 1.2em;
}
.form__status.is-error { color: #DC2626; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--brand-900);
  color: #B9DCF2;
  padding-top: 62px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, .85fr) 1.15fr;
  gap: 36px;
  padding-bottom: 46px;
}
.brand--footer { color: #fff; }
.brand--footer:hover { color: #fff; }
.brand--footer .brand__mark { background: linear-gradient(140deg, var(--brand-400), var(--brand-600)); }
.brand--footer .brand__text small { color: #8FC6E6; }
.footer__desc {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  max-width: 34em;
  color: #A9D2EC;
}
.footer__owner {
  margin-top: 16px;
  font-size: 13px;
  color: #8FC6E6;
}
.footer__col h3 {
  font-size: 14.5px;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 600;
}
.footer__col ul { display: grid; gap: 10px; }
.footer__col a,
.footer__col span {
  color: #A9D2EC;
  font-size: 14px;
  line-height: 1.6;
  transition: color .2s var(--ease);
}
.footer__col a:hover { color: #fff; }
.footer__col--contact a { font-size: 15px; color: #D6EDFB; font-weight: 500; }

.footer__beian {
  border-top: 1px solid rgba(185, 220, 242, .18);
  background: rgba(7, 89, 133, .5);
}
.footer__beian-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
}
.beian {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13.5px;
}
.beian a { color: #CDE9FB; }
.beian a:hover { color: #fff; text-decoration: underline; }
.copyright { font-size: 13px; color: #8FC6E6; }

/* ---------- 滚动揭示 ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .feature-grid,
  .adv-grid,
  .sec-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 22px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }
  .nav.is-open { display: flex; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav__list a { display: block; padding: 13px 4px; font-size: 15.5px; }
  .nav__cta {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-top: 14px;
    padding-top: 16px;
    border-top: 1px solid var(--line-soft);
  }
  .nav-toggle { display: inline-flex; }
  .header__inner { position: relative; }

  .hero__inner { grid-template-columns: 1fr; gap: 44px; padding-bottom: 56px; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about { grid-template-columns: 1fr; gap: 34px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 18px; }
  .mock__kpis { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { padding-inline: 20px; }
  .section { padding-block: 58px; }
  .section__head { margin-bottom: 36px; }
  .hero { padding-top: 48px; }
  .hero__actions .btn { width: 100%; }
  .feature-grid,
  .adv-grid,
  .sec-grid,
  .flow { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 22px; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 22px; }
  .footer__beian-inner { flex-direction: column; align-items: flex-start; }
  .row { grid-template-columns: 1.4fr .6fr .9fr; font-size: 11.5px; }
  .mock__body { padding: 14px; }
}

/* ---------- 无障碍：降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  .feature:hover { transform: none; }
}