/* ==========================================================================
   广西云数信息科技有限公司 · 官网设计系统
   版式参考 Apple：大字号、大留白、极少颜色、清晰的信息层级。
   零依赖、纯 CSS，可直接双击 HTML 打开。
   ========================================================================== */

/* ---------- 1. 基础变量 ---------- */
:root {
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #86868b;
  --line: #d2d2d7;
  --line-soft: #e8e8ed;
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --dark: #000000;
  --dark-2: #0b0b0f;

  --blue: #0071e3;
  --blue-hover: #0077ed;
  --blue-on-dark: #2997ff;
  --orange: #bf4800;
  --green: #1d8a51;

  --radius-s: 12px;
  --radius-m: 20px;
  --radius-l: 28px;
  --radius-xl: 36px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --nav-h: 48px;
  --wrap: 1080px;
  --wrap-wide: 1400px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "SF Pro SC", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 56px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
::selection { background: rgba(0, 113, 227, 0.18); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 3. 版心 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 22px;
}
.wrap--wide { max-width: var(--wrap-wide); }
.wrap--narrow { max-width: 820px; }

.sec { padding-block: clamp(64px, 9vw, 128px); }
.sec--tight { padding-block: clamp(44px, 6vw, 80px); }
.sec--alt { background: var(--bg-alt); }
.sec--dark { background: var(--dark); color: #f5f5f7; }
.sec--dark a { color: var(--blue-on-dark); }
.sec--dark .lede,
.sec--dark .text-2 { color: #a1a1a6; }

/* ---------- 4. 字体层级 ---------- */
.display {
  font-size: clamp(44px, 7.4vw, 92px);
  line-height: 1.04;
  font-weight: 600;
  letter-spacing: -0.022em;
}

.h1 {
  font-size: clamp(36px, 5.4vw, 64px);
  line-height: 1.07;
  font-weight: 600;
  letter-spacing: -0.018em;
}

.h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.014em;
}

.h3 {
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.18;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.h4 {
  font-size: 21px;
  line-height: 1.24;
  font-weight: 600;
  letter-spacing: -0.008em;
}

.lede {
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.42;
  font-weight: 400;
  color: var(--ink-2);
  letter-spacing: -0.005em;
}

.body-lg { font-size: 19px; line-height: 1.55; }
.text-2 { color: var(--ink-2); }
.text-3 { color: var(--ink-3); }
.small { font-size: 14px; line-height: 1.5; }
.tiny { font-size: 12px; line-height: 1.45; }

.eyebrow {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--blue);
  margin-bottom: 12px;
}
.eyebrow--orange { color: var(--orange); }
.eyebrow--muted { color: var(--ink-3); font-weight: 500; }

.display,
.h1,
.h2,
.h3,
.quote {
  text-wrap: balance;
}

.measure { max-width: 62ch; }
.measure--tight { max-width: 46ch; }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }

/* ---------- 5. 通用间距 ---------- */
.stack > * + * { margin-top: 16px; }
.stack-lg > * + * { margin-top: 28px; }
.stack-sm > * + * { margin-top: 10px; }

.sec-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: clamp(32px, 4vw, 56px);
}
.sec-head--center { align-items: center; text-align: center; }
.sec-head__kicker {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.sec--dark .sec-head__kicker { color: #86868b; }

/* ---------- 6. 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 90;
  height: var(--nav-h);
  background: rgba(251, 251, 253, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.is-scrolled { border-bottom-color: rgba(0, 0, 0, 0.1); }

.nav__inner {
  height: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 22px;
  height: 22px;
  flex: none;
  color: var(--ink);
}
.brand__name { line-height: 1; }
.brand__name em {
  font-style: normal;
  font-weight: 400;
  color: var(--ink-3);
  margin-left: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav__links a {
  color: var(--ink);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.01em;
  opacity: 0.86;
  transition: opacity 0.2s ease;
  text-decoration: none;
}
.nav__links a:hover { opacity: 1; text-decoration: none; }
.nav__links a[aria-current="page"] { opacity: 1; font-weight: 500; }

.nav__actions { display: flex; align-items: center; gap: 18px; }

@media (min-width: 981px) {
  .nav__inner { display: grid; grid-template-columns: 1fr auto 1fr; }
  .brand { grid-column: 1; justify-self: start; }
  .nav__links { grid-column: 2; justify-self: center; }
  .nav__actions { grid-column: 3; justify-self: end; }
}
.nav__cta {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  border-radius: 980px;
  background: var(--blue);
  color: #fff !important;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: background 0.2s ease;
}
.nav__cta:hover { background: var(--blue-hover); text-decoration: none; }

.nav__toggle {
  display: none;
  width: 36px;
  height: 36px;
  margin-right: -6px;
  border: 0;
  background: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--ink);
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease), opacity 0.2s ease;
}
.nav__toggle span::before,
.nav__toggle span::after { content: ""; position: relative; }
.nav__toggle span::before { top: -6px; }
.nav__toggle span::after { top: 4.5px; }
.nav.is-open .nav__toggle span { transform: rotate(45deg); }
.nav.is-open .nav__toggle span::before { transform: translateY(6px) rotate(-90deg); }
.nav.is-open .nav__toggle span::after { opacity: 0; }

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 89;
  background: rgba(251, 251, 253, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line-soft);
  padding: 12px 22px 80px;
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, transform 0.28s var(--ease), visibility 0.28s;
}
.mobile-menu.is-visible { opacity: 1; transform: none; visibility: visible; }
.mobile-menu a {
  display: block;
  padding: 13px 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
}
.mobile-menu a:last-child { border-bottom: 0; }

/* ---------- 7. 按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 22px;
  border: 0;
  border-radius: 980px;
  background: var(--blue);
  color: #fff;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: -0.005em;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s var(--ease), box-shadow 0.2s ease;
}
.btn:hover { background: var(--blue-hover); text-decoration: none; }
.btn:active { transform: scale(0.985); }

.btn--ghost {
  background: transparent;
  color: var(--blue);
  box-shadow: inset 0 0 0 1px currentColor;
}
.btn--ghost:hover { background: rgba(0, 113, 227, 0.06); }

.btn--dark {
  background: #f5f5f7;
  color: #1d1d1f;
}
.btn--dark:hover { background: #fff; }

.btn--sm { min-height: 34px; padding: 0 16px; font-size: 14px; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 17px;
  color: var(--blue);
  text-decoration: none;
}
.link-arrow::after {
  content: "›";
  font-size: 1.15em;
  line-height: 1;
  transform: translateY(-0.02em);
  transition: transform 0.24s var(--ease);
}
.link-arrow:hover { text-decoration: underline; }
.link-arrow:hover::after { transform: translate(2px, -0.02em); }

.chev { display: inline-block; }

/* ---------- 8. Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(60px, 9vw, 120px) clamp(48px, 7vw, 96px);
  overflow: clip;
}
.hero--center { text-align: center; }
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 14px;
  border-radius: 980px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--blue);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-bottom: 22px;
}
.hero__eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.hero .display { margin-inline: auto; max-width: 16em; }
.hero__sub {
  margin-top: 22px;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.4;
  color: var(--ink-2);
  max-width: 30em;
  margin-inline: auto;
  letter-spacing: -0.006em;
}
.hero__ctas {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: center;
  justify-content: center;
}
.hero__meta {
  margin-top: 26px;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.01em;
}

/* 首屏背景光晕 */
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  pointer-events: none;
  z-index: -1;
}
.glow--a {
  width: 46vw;
  height: 46vw;
  max-width: 620px;
  max-height: 620px;
  background: radial-gradient(circle at 50% 50%, rgba(0, 113, 227, 0.35), transparent 68%);
  top: -16vw;
  left: -10vw;
}
.glow--b {
  width: 40vw;
  height: 40vw;
  max-width: 520px;
  max-height: 520px;
  background: radial-gradient(circle at 50% 50%, rgba(120, 80, 255, 0.28), transparent 68%);
  top: -8vw;
  right: -12vw;
}
.glow--c {
  width: 34vw;
  height: 34vw;
  max-width: 440px;
  max-height: 440px;
  background: radial-gradient(circle at 50% 50%, rgba(0, 200, 200, 0.22), transparent 68%);
  bottom: -14vw;
  left: 30vw;
}

/* ---------- 9. 卡片 / 磁贴 ---------- */
.grid { display: grid; gap: 16px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--gap-lg { gap: clamp(16px, 2.4vw, 28px); }

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 360px;
  padding: clamp(26px, 3vw, 40px);
  border-radius: var(--radius-l);
  background: var(--bg-alt);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.tile:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.28);
  text-decoration: none;
}
.tile--dark { background: #1d1d1f; color: #f5f5f7; }
.tile--gradient {
  background:
    radial-gradient(120% 120% at 15% 0%, rgba(0, 113, 227, 0.16), transparent 55%),
    radial-gradient(120% 120% at 90% 100%, rgba(120, 80, 255, 0.18), transparent 60%),
    var(--bg-alt);
}
.tile--wide { grid-column: span 2; }

/* 宽磁贴：左文右图，参考 Apple 的双栏产品块 */
@media (min-width: 861px) {
  .tile--wide {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
    gap: clamp(24px, 4vw, 56px);
    min-height: 380px;
  }
  .tile--wide .tile__head { max-width: 32em; }
  .tile--wide .tile__visual {
    margin-top: 0;
    min-height: 0;
  }
  .tile--wide .tile__visual > * { width: 100% !important; }
}

.tile__head { position: relative; z-index: 2; }
.tile__kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 10px;
}
.tile--dark .tile__kicker { color: #86868b; }
.tile__title {
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.014em;
}
.tile__text {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 34ch;
}
.tile--dark .tile__text { color: #a1a1a6; }
.tile__foot {
  position: relative;
  z-index: 2;
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  color: var(--blue);
}
.tile--dark .tile__foot { color: var(--blue-on-dark); }
.tile__visual {
  position: relative;
  margin-top: 34px;
  min-height: 160px;
  display: grid;
  place-items: center;
}

/* 仅文字的信息条目 */
.fact {
  padding: clamp(22px, 2.6vw, 32px);
  border-radius: var(--radius-m);
  background: var(--bg-alt);
  height: 100%;
}
.fact__num {
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 10px;
}
.fact__num small {
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0;
  margin-left: 4px;
  color: var(--ink-2);
}
.fact__label { font-size: 15px; color: var(--ink-2); line-height: 1.45; }

/* ---------- 10. 功能行（交错双栏） ---------- */
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding-block: clamp(40px, 5vw, 64px);
}
.row--reverse .row__text { order: 2; }
.row--reverse .row__visual { order: 1; }
.row__text { max-width: 440px; }
.row__text .h3 { margin-bottom: 14px; }
.row__list { margin-top: 22px; }
.row__list li {
  position: relative;
  padding-left: 22px;
  margin-top: 12px;
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.5;
}
.row__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  opacity: 0.7;
}

/* ---------- 11. 界面模拟（纯 CSS 产品视觉） ---------- */
.mock {
  position: relative;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.05),
    0 28px 60px -28px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  font-size: 13px;
  color: var(--ink);
}
.mock--dark {
  background: #17171a;
  border-color: rgba(255, 255, 255, 0.1);
  color: #ededf0;
}
.mock__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  background: rgba(0, 0, 0, 0.02);
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}
.mock--dark .mock__bar {
  background: rgba(255, 255, 255, 0.03);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
.mock__dots { display: flex; gap: 6px; }
.mock__dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #e0e0e4;
}
.mock__dots i:nth-child(1) { background: #ff5f57; }
.mock__dots i:nth-child(2) { background: #febc2e; }
.mock__dots i:nth-child(3) { background: #28c840; }
.mock__title {
  font-size: 11.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.mock--dark .mock__title { color: #8b8b93; }
.mock__body { padding: 18px; }

.skeleton {
  height: 8px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.07);
}
.mock--dark .skeleton { background: rgba(255, 255, 255, 0.12); }
.skeleton--short { width: 42%; }
.skeleton--mid { width: 68%; }

/* 顶部胶囊状态条 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 22px;
  padding: 0 9px;
  border-radius: 980px;
  background: rgba(0, 113, 227, 0.1);
  color: var(--blue);
  font-size: 11px;
  font-weight: 500;
}
.chip--green { background: rgba(29, 138, 81, 0.12); color: var(--green); }
.chip--gray { background: rgba(0, 0, 0, 0.06); color: var(--ink-2); }

/* 条形图 */
.bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 76px;
  margin-top: 14px;
}
.bars i {
  flex: 1;
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, rgba(0, 113, 227, 0.9), rgba(0, 113, 227, 0.35));
  height: var(--h, 40%);
  transform-origin: bottom center;
}

@keyframes barGrow {
  from { transform: scaleY(0.12); opacity: 0.25; }
  to { transform: none; opacity: 1; }
}
.js [data-reveal].is-in .bars i { animation: barGrow 0.85s var(--ease) both; }
.js [data-reveal].is-in .bars i:nth-child(2) { animation-delay: 60ms; }
.js [data-reveal].is-in .bars i:nth-child(3) { animation-delay: 120ms; }
.js [data-reveal].is-in .bars i:nth-child(4) { animation-delay: 180ms; }
.js [data-reveal].is-in .bars i:nth-child(5) { animation-delay: 240ms; }
.js [data-reveal].is-in .bars i:nth-child(6) { animation-delay: 300ms; }
.js [data-reveal].is-in .bars i:nth-child(7) { animation-delay: 360ms; }
.js [data-reveal].is-in .bars i:nth-child(8) { animation-delay: 420ms; }

/* 跳转链接（键盘可达） */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 0 0 12px 0;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
  color: #fff;
  text-decoration: none;
}

/* 幻灯片缩略 */
.slide-mock {
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 55%, #334155 100%);
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #fff;
}
.slide-mock__title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  max-width: 12em;
  line-height: 1.3;
}
.slide-mock__lines { display: grid; gap: 5px; margin-top: 8px; }
.slide-mock__lines i {
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.35);
}
.slide-mock__lines i:nth-child(2) { width: 82%; }
.slide-mock__lines i:nth-child(3) { width: 64%; }

/* 列表行 */
.mock-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  font-size: 12.5px;
}
.mock--dark .mock-row { border-bottom-color: rgba(255, 255, 255, 0.08); }
.mock-row:last-child { border-bottom: 0; }
.mock-row__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  flex: none;
}
.mock-row__dot--green { background: #28c840; }
.mock-row__dot--amber { background: #febc2e; }
.mock-row__text { flex: 1; color: var(--ink-2); }
.mock--dark .mock-row__text { color: #a1a1a6; }
.mock-row__meta { font-size: 11px; color: var(--ink-3); }

/* 代码块 */
.code {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: #d6d6de;
  background: #0f0f13;
  border-radius: 12px;
  padding: 16px 18px;
  overflow-x: auto;
  white-space: pre;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.code .c { color: #6b6b76; }
.code .k { color: #ff7ab2; }
.code .s { color: #a5e075; }
.code .n { color: #7ec8ff; }

/* ---------- 12. 分节导航（产品页） ---------- */
.subnav {
  position: sticky;
  top: var(--nav-h);
  z-index: 80;
  background: rgba(251, 251, 253, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line-soft);
}
.subnav__inner {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 52px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 22px;
  overflow-x: auto;
  scrollbar-width: none;
}
.subnav__inner::-webkit-scrollbar { display: none; }
.subnav__name {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  margin-right: 4px;
}
.subnav a {
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}
.subnav a:hover { color: var(--ink); }
.subnav__cta {
  margin-left: auto;
  padding-left: 20px;
  color: var(--blue) !important;
  font-weight: 500;
}

/* ---------- 13. 数据/指标 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.stats > div {
  background: var(--bg);
  padding: clamp(22px, 2.6vw, 34px);
}
.sec--alt .stats > div { background: var(--bg-alt); }
.sec--dark .stats { background: rgba(255, 255, 255, 0.12); }
.sec--dark .stats > div { background: var(--dark); }
.stat__num {
  font-size: clamp(30px, 3.6vw, 46px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat__num small { font-size: 0.4em; font-weight: 500; letter-spacing: 0; margin-left: 3px; color: var(--ink-2); }
.stat__label { margin-top: 10px; font-size: 14px; color: var(--ink-2); line-height: 1.4; }

/* ---------- 14. 引文 / 结语 ---------- */
.quote {
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.28;
  font-weight: 600;
  letter-spacing: -0.018em;
  text-align: center;
  max-width: 20em;
  margin-inline: auto;
}
.quote__by {
  margin-top: 22px;
  text-align: center;
  font-size: 14px;
  color: var(--ink-3);
}

/* ---------- 15. CTA 区块 ---------- */
.cta-band {
  border-radius: var(--radius-xl);
  padding: clamp(40px, 6vw, 76px) clamp(26px, 5vw, 72px);
  background:
    radial-gradient(90% 140% at 12% 0%, rgba(0, 113, 227, 0.22), transparent 58%),
    radial-gradient(90% 140% at 88% 100%, rgba(120, 80, 255, 0.24), transparent 58%),
    #101014;
  color: #f5f5f7;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.cta-band .h2 { max-width: 15em; color: #f5f5f7; }
.cta-band .lede { color: #a1a1a6; margin-top: 12px; }

/* ---------- 16. 页脚 ---------- */
.footer {
  background: var(--bg-alt);
  color: var(--ink-2);
  font-size: 12px;
  line-height: 1.6;
  padding-block: 44px 36px;
  border-top: 1px solid var(--line-soft);
}
.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.footer h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}
.footer li { margin-top: 7px; }
.footer a { color: var(--ink-2); text-decoration: none; }
.footer a:hover { color: var(--ink); text-decoration: underline; }
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  padding-top: 22px;
  color: var(--ink-3);
}
.footer__note { margin-top: 14px; color: var(--ink-3); max-width: 70ch; }
.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
.footer__brand svg { width: 20px; height: 20px; }

/* ---------- 17. 动效 ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}
.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.9s var(--ease),
    transform 0.9s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}
.js [data-reveal="fade"] { transform: none; }
.js [data-reveal="scale"] { transform: scale(0.965); }
.js [data-reveal="scale"].is-in { transform: none; }

.parallax { transition: transform 0.18s linear; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal],
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .js [data-reveal].is-in .bars i { animation: none; }
  .parallax { transform: none !important; }
  .btn, .tile, .link-arrow::after { transition: none; }
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 980px) {
  .nav__links { display: none; }
  .nav__toggle { display: inline-flex; }
  .nav__actions .nav__cta { display: none; }

  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tile--wide { grid-column: span 2; }

  .row { grid-template-columns: 1fr; gap: 30px; }
  .row--reverse .row__text,
  .row--reverse .row__visual { order: 0; }
  .row__text { max-width: none; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 18px; }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .tile--wide { grid-column: span 1; }
  .tile { min-height: 320px; }
  .hero { padding-top: 44px; }
  .hero__ctas { flex-direction: column; align-items: stretch; }
  .hero__ctas .btn { width: 100%; }
  .hero__ctas .link-arrow { justify-content: center; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .stats { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr 1fr; gap: 22px; }
  .brand__name em { display: none; }
  .subnav__inner { gap: 18px; }
  .subnav__cta { display: none; }
}

/* ---------- 20. 首页产品舞台 ---------- */
.stage {
  position: relative;
  margin-top: clamp(40px, 6vw, 80px);
  padding: clamp(18px, 2.6vw, 34px);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(0, 113, 227, 0.07), transparent 55%),
    radial-gradient(120% 90% at 85% 100%, rgba(120, 80, 255, 0.08), transparent 55%),
    var(--bg-alt);
  border: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 18px;
  align-items: start;
}
.stage__glow {
  position: absolute;
  inset: auto 10% -30px 10%;
  height: 120px;
  background: radial-gradient(50% 100% at 50% 0%, rgba(0, 0, 0, 0.12), transparent);
  filter: blur(24px);
  z-index: 0;
  pointer-events: none;
}
.stage { text-align: left; }
.stage__main { grid-row: span 2; position: relative; z-index: 1; }
.stage__side { position: relative; z-index: 1; }
.stage__chipchip { position: relative; z-index: 1; }
.stage__caption {
  margin-top: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.01em;
}

.mock-slides {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.slide-mock--alt { background: linear-gradient(135deg, #0b3d4f 0%, #0e5a6e 55%, #14808f 100%); }
.slide-mock--warm { background: linear-gradient(135deg, #3d1f1a 0%, #6b3220 55%, #9a4a2b 100%); }

.mini-tool {
  aspect-ratio: 1 / 1;
  border-radius: 9px;
  background: rgba(0, 0, 0, 0.055);
  border: 1px solid rgba(0, 0, 0, 0.04);
}
.mini-tool--on {
  background: linear-gradient(135deg, rgba(0, 113, 227, 0.9), rgba(0, 113, 227, 0.55));
  border-color: transparent;
}

@media (max-width: 860px) {
  .stage {
    grid-template-columns: 1fr;
  }
  .stage__main { grid-row: auto; }
  .mock-slides { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mock-slides > :nth-child(3) { display: none; }
}

/* ---------- 21. 内页首屏与补充组件 ---------- */
.hero--sm {
  padding-block: clamp(46px, 6vw, 84px) clamp(22px, 3vw, 38px);
}
.hero--sm .display {
  font-size: clamp(40px, 5.4vw, 70px);
  max-width: 24em;
}
.hero--sm .hero__sub { margin-top: 16px; }

.sec--dark .row__list li { color: #a1a1a6; }

.timeline {
  display: flex;
  gap: 4px;
  height: 38px;
  align-items: stretch;
}
.timeline span {
  border-radius: 5px;
  background: linear-gradient(180deg, rgba(41, 151, 255, 0.95), rgba(41, 151, 255, 0.35));
}
.timeline span:nth-child(2n) {
  background: linear-gradient(180deg, rgba(255, 122, 178, 0.9), rgba(255, 122, 178, 0.3));
}
.timeline span:nth-child(3n) {
  background: linear-gradient(180deg, rgba(120, 220, 200, 0.9), rgba(120, 220, 200, 0.3));
}

/* 规格表 */
.specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
  margin-top: 8px;
}
.specs > div {
  background: var(--bg);
  padding: 22px 24px;
}
.specs dt {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.specs dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.45;
}

/* 步骤 */
.steps { display: grid; gap: 1px; background: var(--line-soft); border-radius: var(--radius-m); overflow: hidden; }
.steps > div { background: var(--bg); padding: 26px 24px; display: grid; gap: 8px; }
.step__n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue);
  letter-spacing: 0.08em;
}
.step__t { font-size: 17px; font-weight: 600; }
.step__d { font-size: 14px; color: var(--ink-2); line-height: 1.5; }

/* 引用块 */
.note {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 18px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
}

/* FAQ */
.faq { border-top: 1px solid var(--line-soft); }
.faq details {
  border-bottom: 1px solid var(--line-soft);
  padding: 18px 0;
}
.faq summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--ink-3); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin-top: 12px; color: var(--ink-2); font-size: 15px; line-height: 1.6; max-width: 62ch; }

/* 工具集：九宫格与证件照示意 */
.tool-cell {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.045);
  border: 1px solid rgba(0, 0, 0, 0.04);
  display: grid;
  place-items: center;
  font-size: 12px;
  color: var(--ink-3);
}
.tool-cell--on {
  background: linear-gradient(135deg, rgba(0, 113, 227, 0.95), rgba(0, 113, 227, 0.52));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}
.photo-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.photo-cell {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(160deg, #e6e6ea, #f7f7f9);
}
.photo-cell::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -16%;
  width: 64%;
  aspect-ratio: 1 / 1;
  transform: translateX(-50%);
  border-radius: 50% 50% 0 0;
  background: rgba(0, 0, 0, 0.12);
}
.photo-cell--blue { background: linear-gradient(160deg, #dbeafe, #eff6ff); }
.photo-cell--red { background: linear-gradient(160deg, #fee2e2, #fff1f2); }

/* 表单 */
.form { display: grid; gap: 20px; }
.form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.field { display: grid; gap: 8px; font-size: 14px; color: var(--ink-2); }
.field--full { grid-column: 1 / -1; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, #86868b 50%),
    linear-gradient(135deg, #86868b 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 42px;
}
.field textarea { resize: vertical; min-height: 120px; line-height: 1.55; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}
.field input::placeholder,
.field textarea::placeholder { color: #b0b0b6; }

@media (max-width: 640px) {
  .form__grid { grid-template-columns: 1fr; }
}

/* 404 */
.notfound {
  min-height: calc(100vh - var(--nav-h));
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: 80px;
}
.notfound__code {
  font-size: clamp(72px, 12vw, 132px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink);
}

/* ---------- 23. 项目 / 案例卡片 ---------- */
.logo-mark {
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  background: linear-gradient(135deg, #0071e3, #4fb0ff);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}
.logo-mark--violet { background: linear-gradient(135deg, #5b5bf0, #a86bff); }
.logo-mark--teal { background: linear-gradient(135deg, #0e8f8a, #4fd1c5); }
.logo-mark--amber { background: linear-gradient(135deg, #c2410c, #f59e0b); }
.logo-mark--ink { background: linear-gradient(135deg, #1d1d1f, #4a4a52); }
.logo-mark--rose { background: linear-gradient(135deg, #be185d, #fb7185); }
.logo-mark--green { background: linear-gradient(135deg, #15803d, #4ade80); }
.logo-mark--sm { width: 40px; height: 40px; border-radius: 11px; font-size: 15px; }

.project {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
  padding: clamp(22px, 2.6vw, 32px);
  border-radius: var(--radius-l);
  background: var(--bg-alt);
}
.sec--alt .project { background: var(--bg); }
.project__head { display: flex; align-items: center; gap: 14px; }
.project__title { font-size: 21px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.2; }
.project__meta { font-size: 13px; color: var(--ink-3); margin-top: 3px; }
.project__text { font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.project__list { display: grid; gap: 7px; }
.project__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
}
.project__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ink-3);
  opacity: 0.6;
}
.project__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 6px;
}

.chip-tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 980px;
  background: rgba(0, 0, 0, 0.055);
  color: var(--ink-2);
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}
.sec--dark .chip-tag { background: rgba(255, 255, 255, 0.12); color: #d2d2d7; }
.chip-tag--blue { background: rgba(0, 113, 227, 0.1); color: var(--blue); }
.chip-tag--green { background: rgba(29, 138, 81, 0.12); color: var(--green); }
.chip-tag--amber { background: rgba(194, 65, 12, 0.12); color: var(--orange); }

/* 状态点 */
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ink-2);
}
.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}
.status--dev::before { background: #d97706; }
.status--lab::before { background: var(--ink-3); }

/* 项目分组标题 */
.group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}
.group-head h2 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 600; letter-spacing: -0.012em; }
.group-head p { font-size: 14px; color: var(--ink-3); }

/* 可点击的信息卡 */
a.fact {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.2s ease;
}
a.fact:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px -18px rgba(0, 0, 0, 0.35);
  text-decoration: none;
}
a.fact .logo-mark { margin-bottom: 14px; }

/* ---------- 22. 灰底区块内的卡片反差 ---------- */.sec--alt .tile,
.sec--alt .fact { background: var(--bg); }
.sec--alt .tile--gradient {
  background:
    radial-gradient(120% 120% at 15% 0%, rgba(0, 113, 227, 0.14), transparent 55%),
    radial-gradient(120% 120% at 90% 100%, rgba(120, 80, 255, 0.16), transparent 60%),
    var(--bg);
}
.sec--alt .tile--dark { background: #1d1d1f; }
.sec--alt .tile--dark .tile__text { color: #a1a1a6; }

/* ---------- 19. 打印 ---------- */
@media print {
  .nav, .subnav, .mobile-menu, .cta-band { display: none; }
  [data-reveal] { opacity: 1; transform: none; }
  body { color: #000; }
}

/* ---------- 21. 联系人（contact.html 与页脚） ---------- */
.people {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 22px);
}
.person {
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 2.8vw, 32px);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-soft);
  background: var(--bg);
  height: 100%;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.person:hover {
  border-color: var(--line);
  box-shadow: 0 10px 34px -22px rgba(0, 0, 0, 0.28);
}
.person__head { display: flex; align-items: center; gap: 14px; }
.person__avatar {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(150deg, #eaf1ff, #d8e6ff);
  color: #0055b3;
  font-size: 17px;
  font-weight: 600;
}
.person__name { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; color: var(--ink); }
.person__role { margin-top: 3px; font-size: 13.5px; color: var(--ink-3); }
.person__lines {
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  display: grid;
  gap: 10px;
}
.person__lines li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 14px; }
.person__k { flex: 0 0 30px; font-size: 13px; color: var(--ink-3); }
.person__lines a { color: var(--ink); font-size: 15px; font-variant-numeric: tabular-nums; }
.person__lines a:hover { color: var(--blue); }

.footer__contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 26px;
  margin-top: 16px;
  color: var(--ink-3);
}
.footer__contacts > span { display: inline-flex; flex-wrap: wrap; align-items: baseline; gap: 0 8px; }
.footer__contacts a + a::before { content: "·"; margin-right: 8px; color: var(--line); }
.footer__who { color: var(--ink); font-weight: 600; }

@media (max-width: 640px) {
  .people { grid-template-columns: 1fr; }
  .footer__contacts { flex-direction: column; gap: 8px; }
}

/* ---------- 22. 首页：左文右图首屏 ---------- */
.hero--split .hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  align-items: center;
  gap: clamp(26px, 4vw, 52px);
}
.hero--split .hero__eyebrow { margin-bottom: 18px; }
.hero--split .display {
  margin-inline: 0;
  max-width: none;
  text-align: left;
  font-size: clamp(32px, 4.1vw, 52px);
  line-height: 1.1;
}
.hero--split .hero__sub {
  margin-inline: 0;
  max-width: 31em;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.5;
}
.hero--split .hero__ctas { justify-content: flex-start; margin-top: 30px; }
.hero--split { padding-block: clamp(52px, 7vw, 96px) clamp(22px, 3vw, 40px); }

/* ---------- 23. 系统卡（项目与产品共用） ---------- */
.sys {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: clamp(22px, 2.6vw, 30px);
  border-radius: var(--radius-l);
  background: var(--bg-alt);
  border: 1px solid transparent;
}
.sec--alt .sys { background: #fff; }
.sys__role {
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.01em;
  margin-bottom: 8px;
}
.sys__name {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.28;
}
.sys__desc {
  margin-top: 12px;
  margin-bottom: 18px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
}
.sys__list {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 8px;
}
.sys__list li {
  position: relative;
  padding-left: 15px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
}
.sys__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.35;
}
.sys__foot {
  margin-top: auto;
  padding-top: 18px;
  font-size: 15px;
  color: var(--blue);
}
.sys__foot span { display: inline; }

.stats--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sec--dark .fact { background: rgba(255, 255, 255, 0.06); }
.sec--dark .fact .h4 { color: #f5f5f7; }
.sec--dark .fact .stat__label { color: #a1a1a6; }

@media (max-width: 940px) {
  .hero--split .hero__inner { grid-template-columns: 1fr; }
  .hero--split .display { max-width: none; }
}
@media (max-width: 720px) {
  .stats--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 520px) {
  .stats--3 { grid-template-columns: 1fr; }
}

/* ---------- 24. 页脚窄屏 ---------- */
@media (max-width: 640px) {
  .footer__cols { grid-template-columns: 1fr 1fr; row-gap: 22px; }
  .footer__cols > div:first-child { grid-column: 1 / -1; }
  .footer__legal { flex-direction: column; align-items: flex-start; gap: 4px; }
}

@media (max-width: 640px) {
  .hero--split .hero__ctas { align-items: flex-start; }
}