/* ==========================================================================
   宸宇筑梦科技 · 企业官网样式表
   设计语言：深蓝底 + 品牌蓝渐变 + 金色点缀；环形轨道母题取自企业徽标。
   全部资源本地化，不请求任何外部 CDN（利于境内访问与备案审核）。
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  color-scheme: dark;

  /* 底色 */
  --ink-950: #04060D;
  --ink-900: #060A14;
  --ink-850: #080E1C;
  --ink-800: #0A1222;
  --ink-750: #0D1729;
  --ink-700: #111D33;

  /* 品牌 */
  --brand-600: #1D4ED8;
  --brand-500: #2563EB;
  --brand-400: #3B82F6;
  --brand-300: #60A5FA;
  --brand-200: #93C5FD;
  --gold-500: #F0B017;
  --gold-400: #FFC94A;
  --gold-300: #FFE0A3;

  /* 文字 */
  --text-hi: #EEF3FF;
  --text: #C6D4EE;
  --text-mute: #8CA0C2;
  --text-dim: #7B8BA9;

  /* 线条与表面 */
  --line: rgba(150, 180, 235, 0.16);
  --line-soft: rgba(150, 180, 235, 0.08);
  --line-strong: rgba(150, 180, 235, 0.28);
  --card-bg: linear-gradient(162deg, rgba(255, 255, 255, 0.062), rgba(255, 255, 255, 0.018));
  --card-bd: rgba(255, 255, 255, 0.10);
  --card-hd: rgba(255, 255, 255, 0.20);
  --glass-blur: 14px;

  /* 尺寸 */
  --maxw: 1200px;
  --gutter: clamp(20px, 4.4vw, 48px);
  --nav-h: 72px;
  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* 阴影 */
  --sh-1: 0 2px 10px rgba(2, 6, 20, 0.35);
  --sh-2: 0 18px 44px -26px rgba(2, 8, 26, 0.95);
  --sh-3: 0 40px 90px -50px rgba(2, 10, 34, 0.95);
  --sh-brand: 0 20px 48px -24px rgba(37, 99, 235, 0.55);

  /* 字体 */
  --font-cn: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-num: "SF Pro Display", "Segoe UI", Inter, "Helvetica Neue", Arial, sans-serif;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 0.55s;
}

/* 浅色区段：只切换令牌，组件自动跟随 */
.theme-light {
  color-scheme: light;
  --ink-950: #F7F9FE;
  --ink-900: #FFFFFF;
  --ink-850: #F7F9FE;
  --ink-800: #FFFFFF;
  --ink-750: #F2F6FD;
  --ink-700: #EAF0FA;
  --text-hi: #0A1628;
  --text: #33445F;
  --text-mute: #5D6F8C;
  --text-dim: #5F6C82;
  --line: rgba(16, 42, 84, 0.13);
  --line-soft: rgba(16, 42, 84, 0.07);
  --line-strong: rgba(16, 42, 84, 0.22);
  --card-bg: linear-gradient(162deg, #FFFFFF, #F7FAFF);
  --card-bd: rgba(16, 42, 84, 0.10);
  --card-hd: rgba(16, 42, 84, 0.16);
  --sh-1: 0 2px 8px rgba(16, 42, 84, 0.06);
  --sh-2: 0 20px 46px -28px rgba(16, 42, 84, 0.28);
  --sh-3: 0 40px 90px -54px rgba(16, 42, 84, 0.3);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--text);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  /* 极细颗粒，消除大面积渐变的塑料感 */
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
svg { display: block; }
::selection { background: rgba(37, 99, 235, 0.36); color: #fff; }

:focus-visible {
  outline: 2px solid var(--brand-300);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 3. 版式工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 2;
}

.section {
  position: relative;
  padding-block: clamp(72px, 9vw, 132px);
  background: var(--ink-900);
  isolation: isolate;
}

.section--tight { padding-block: clamp(56px, 6vw, 88px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand-300);
  font-family: var(--font-num);
}
.theme-light .eyebrow { color: var(--brand-600); }
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(240, 176, 23, 0.16);
}

.h1, .h2, .h3 {
  color: var(--text-hi);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.18;
  text-wrap: balance;
}
.h1 { font-size: clamp(32px, 4.6vw, 60px); }
.h2 { font-size: clamp(26px, 3.5vw, 44px); }
.h3 { font-size: clamp(19px, 1.7vw, 23px); line-height: 1.4; }

.lead {
  font-size: clamp(15px, 1.24vw, 17.5px);
  line-height: 1.85;
  color: var(--text-mute);
  max-width: 62ch;
}

.sec-head { display: grid; gap: 18px; max-width: 760px; }
.sec-head--split {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  max-width: none;
  gap: 32px;
}

.grad-text {
  background: linear-gradient(96deg, #FFFFFF 8%, var(--brand-200) 48%, var(--gold-300) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.theme-light .grad-text {
  background: linear-gradient(96deg, #0A1628 6%, var(--brand-600) 52%, #B8790A 98%);
  -webkit-background-clip: text;
  background-clip: text;
}

.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }

/* 背景点缀 */
.grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 62% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 62% at 50% 0%, #000 0%, transparent 78%);
}

.aurora {
  position: absolute;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.aurora span {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
}
.aurora span:nth-child(1) {
  width: 46vw; height: 46vw; left: -12vw; top: -16vw;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.55), transparent 68%);
  animation: drift 26s var(--ease) infinite alternate;
}
.aurora span:nth-child(2) {
  width: 38vw; height: 38vw; right: -10vw; top: -8vw;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.32), transparent 70%);
  animation: drift 32s var(--ease) infinite alternate-reverse;
}
.aurora span:nth-child(3) {
  width: 26vw; height: 26vw; right: 18vw; top: 30vw;
  background: radial-gradient(circle, rgba(240, 176, 23, 0.16), transparent 70%);
  animation: drift 38s var(--ease) infinite alternate;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4vw, 3vw, 0) scale(1.14); }
}

/* ---------- 4. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--text-hi);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--r-pill);
  border: 1px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease),
    background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease);
  will-change: transform;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn:hover { transform: translateY(-2px); }

.btn--brand {
  --btn-fg: #fff;
  border: 0;
  background: linear-gradient(132deg, var(--brand-500), #1B45C4 88%);
  box-shadow: var(--sh-brand), inset 0 1px 0 rgba(255, 255, 255, 0.24);
}
.btn--brand:hover { box-shadow: 0 26px 56px -22px rgba(37, 99, 235, 0.72), inset 0 1px 0 rgba(255, 255, 255, 0.3); }

.btn--ghost { background: rgba(255, 255, 255, 0.03); }
.theme-light .btn--ghost { background: #fff; --btn-bd: var(--line-strong); }
.btn--ghost:hover { --btn-bd: var(--brand-400); color: var(--brand-200); }
.theme-light .btn--ghost:hover { color: var(--brand-600); --btn-bd: var(--brand-500); }

.btn--sm { height: 40px; padding: 0 18px; font-size: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--brand-300);
  transition: gap 0.35s var(--ease), color 0.3s var(--ease);
}
.theme-light .link-arrow { color: var(--brand-600); }
.link-arrow svg { width: 15px; height: 15px; }
.link-arrow:hover { gap: 12px; }

/* ---------- 5. 顶部导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 90;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease),
    backdrop-filter 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(6, 10, 20, 0.78);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line-soft);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand__mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(150deg, #FFFFFF, #E8F0FF);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 18px -8px rgba(37, 99, 235, 0.7), inset 0 0 0 1px rgba(29, 78, 216, 0.16);
  overflow: hidden;
}
.brand__mark img { width: 32px; height: 32px; }
.brand__txt { display: grid; gap: 1px; line-height: 1.2; }
.brand__cn {
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-hi);
}
.brand__en {
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  font-family: var(--font-num);
  text-transform: uppercase;
}

.nav__menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 9px 14px;
  font-size: 14.5px;
  color: var(--text-mute);
  border-radius: var(--r-xs);
  transition: color 0.3s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--brand-400), var(--gold-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
  border-radius: 2px;
}
.nav__link:hover { color: var(--text-hi); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--text-hi); }
.nav__cta { margin-left: 10px; }
.nav__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--brand-500), var(--gold-500));
  z-index: 2;
}

.nav__burger {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  place-items: center;
  background: rgba(255, 255, 255, 0.03);
}
.nav__burger span {
  display: block;
  width: 18px;
  height: 1.6px;
  background: var(--text-hi);
  border-radius: 2px;
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease);
}
.nav__burger span + span { margin-top: 5px; }
.nav.is-open .nav__burger span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__burger span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(4, 7, 15, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: calc(var(--nav-h) + 28px) var(--gutter) 40px;
  display: none;
  flex-direction: column;
  gap: 6px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
.drawer.is-open { opacity: 1; transform: none; }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 4px;
  font-size: 20px;
  font-weight: 500;
  color: var(--text-hi);
  border-bottom: 1px solid var(--line-soft);
}
.drawer__link small {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  font-family: var(--font-num);
  text-transform: uppercase;
}
.drawer__foot { margin-top: auto; display: grid; gap: 14px; padding-top: 28px; }
.drawer__foot .btn { width: 100%; }

/* ---------- 6. 首屏 ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + clamp(48px, 7vw, 96px));
  padding-bottom: clamp(56px, 7vw, 104px);
  background:
    radial-gradient(ellipse 120% 80% at 78% -10%, rgba(37, 99, 235, 0.24), transparent 62%),
    radial-gradient(ellipse 90% 60% at 8% 4%, rgba(29, 78, 216, 0.18), transparent 60%),
    var(--ink-950);
  overflow: hidden;
  isolation: isolate;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 32px;
  padding: 0 14px 0 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text);
}
.hero__badge b {
  font-weight: 500;
  color: var(--gold-300);
  font-family: var(--font-num);
  letter-spacing: 0.08em;
}
.hero__badge i {
  width: 6px; height: 6px; border-radius: 50%;
  background: #34D399;
  box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.18);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.86); }
}
.hero h1 {
  margin-top: 24px;
  font-size: clamp(31px, 3.85vw, 55px);
  line-height: 1.16;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--brand-200), var(--gold-300));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub { margin-top: 22px; font-size: clamp(15px, 1.25vw, 17.5px); line-height: 1.9; color: var(--text-mute); max-width: 54ch; }
.hero__acts { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero__meta {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  font-size: 13px;
  color: var(--text-mute);
}
.hero__meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta svg { width: 15px; height: 15px; color: var(--brand-300); }

/* 环形轨道母题 */
.orbit {
  position: relative;
  aspect-ratio: 1;
  width: 100%;
  max-width: 470px;
  margin-inline: auto;
  display: grid;
  place-items: center;
}
.orbit__svg { width: 100%; height: 100%; overflow: visible; }
.orbit__ring { fill: none; stroke: rgba(150, 180, 235, 0.24); stroke-width: 1; }
.orbit__ring--dash { stroke-dasharray: 3 7; stroke: rgba(150, 180, 235, 0.3); }
.orbit__spinslow { transform-origin: 260px 260px; animation: spin 64s linear infinite; }
.orbit__spinfast { transform-origin: 260px 260px; animation: spin 40s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

.orbit__core {
  position: absolute;
  width: 30%;
  aspect-ratio: 1;
  border-radius: 30%;
  background: linear-gradient(160deg, #FFFFFF, #E6EFFF);
  display: grid;
  place-items: center;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.5),
    0 26px 60px -22px rgba(37, 99, 235, 0.75),
    0 0 90px -10px rgba(96, 165, 250, 0.45);
}
.orbit__core img { width: 74%; height: 74%; }

.orbit__node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(10, 18, 34, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text);
  box-shadow: var(--sh-1);
  white-space: nowrap;
  animation: float 7s var(--ease) infinite alternate;
}
.orbit__node svg { width: 14px; height: 14px; color: var(--brand-300); }
.orbit__node:nth-of-type(1) { top: 5%; left: 50%; transform: translate(-50%, 0); animation-delay: 0.2s; }
.orbit__node:nth-of-type(2) { top: 26%; right: -2%; animation-delay: 1.1s; }
.orbit__node:nth-of-type(3) { bottom: 22%; right: 2%; animation-delay: 0.6s; }
.orbit__node:nth-of-type(4) { bottom: 4%; left: 50%; transform: translate(-50%, 0); animation-delay: 1.6s; }
.orbit__node:nth-of-type(5) { top: 30%; left: -3%; animation-delay: 2.1s; }
@keyframes float {
  from { translate: 0 0; }
  to { translate: 0 -9px; }
}
.orbit__node--gold { border-color: rgba(240, 176, 23, 0.4); }
.orbit__node--gold svg { color: var(--gold-400); }

/* ---------- 7. 关键词跑马灯 ---------- */
.marquee {
  position: relative;
  border-block: 1px solid var(--line-soft);
  background: var(--ink-850);
  padding-block: 20px;
  overflow: hidden;
  --mask: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent);
  mask-image: var(--mask);
  -webkit-mask-image: var(--mask);
}
.marquee__track {
  display: flex;
  width: max-content;
  gap: 44px;
  animation: slide 42s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }
.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 44px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  white-space: nowrap;
}
.marquee__item::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-500);
  opacity: 0.6;
}

/* ---------- 8. 卡片与便当格 ---------- */
.card {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--card-bd);
  background: var(--card-bg);
  padding: clamp(22px, 2.4vw, 30px);
  overflow: hidden;
  transition: border-color 0.45s var(--ease), transform 0.45s var(--ease-out),
    box-shadow 0.45s var(--ease);
  isolation: isolate;
}
.card::before {
  /* 鼠标跟随光斑 */
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 0%), rgba(96, 165, 250, 0.16), transparent 70%);
}
.card:hover { border-color: var(--card-hd); transform: translateY(-3px); box-shadow: var(--sh-2); }
.card:hover::before { opacity: 1; }

.card__ico {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(37, 99, 235, 0.24), rgba(37, 99, 235, 0.06));
  color: var(--brand-200);
  margin-bottom: 18px;
}
.card__ico svg { width: 22px; height: 22px; }
.card h3 { margin-bottom: 9px; }
.card p { font-size: 14.5px; line-height: 1.8; color: var(--text-mute); }
.card__tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-size: 11.5px;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  color: var(--text-mute);
  background: rgba(255, 255, 255, 0.025);
}
.theme-light .tag { background: rgba(16, 42, 84, 0.035); }

.bento {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.bento > .card:nth-child(1) { grid-column: span 2; }
.bento > .card:nth-child(4) { grid-column: span 2; }

.bento .feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: 24px;
  align-items: center;
}
.bento .feature .card__art { width: 100%; }
.card__art { color: var(--brand-300); opacity: 0.9; }
.card__art svg { width: 100%; height: auto; }

/* ---------- 9. 解决方案（浅色区） ---------- */
.solutions {
  background: var(--paper, #F6F8FD);
  border-block: 1px solid rgba(16, 42, 84, 0.08);
}
.sol-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 52px; }
.sol {
  position: relative;
  border-radius: var(--r-xl);
  background: #fff;
  border: 1px solid rgba(16, 42, 84, 0.09);
  padding: clamp(26px, 2.8vw, 38px);
  box-shadow: var(--sh-1);
  overflow: hidden;
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease), border-color 0.4s var(--ease);
}
.sol:hover {
  transform: translateY(-4px);
  box-shadow: 0 34px 70px -40px rgba(16, 42, 84, 0.42);
  border-color: rgba(37, 99, 235, 0.3);
}
.sol__idx {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brand-600);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sol__idx::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.3), transparent);
}
.sol h3 { margin: 16px 0 10px; font-size: clamp(19px, 1.6vw, 22px); color: #0A1628; }
.sol p { font-size: 14.5px; color: #54657F; line-height: 1.85; }
.sol__list { margin-top: 20px; display: grid; gap: 10px; }
.sol__list li {
  display: flex;
  gap: 9px;
  font-size: 13.8px;
  color: #3E4E68;
  line-height: 1.7;
}
.sol__list li svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: var(--brand-500); }
.sol__ico {
  position: absolute;
  right: 22px;
  top: 22px;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, #EEF4FF, #DDE9FF);
  color: var(--brand-600);
}
.sol__ico svg { width: 20px; height: 20px; }

/* ---------- 10. 分层架构 / 流程 ---------- */
.stack { display: grid; gap: 12px; margin-top: 48px; }
.stack__row {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  padding: 20px clamp(18px, 2.2vw, 28px);
  border-radius: var(--r-md);
  border: 1px solid var(--card-bd);
  background: var(--card-bg);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease-out);
}
.stack__row:hover { border-color: var(--card-hd); transform: translateX(4px); }
.stack__label { display: flex; align-items: center; gap: 11px; }
.stack__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand-300); box-shadow: 0 0 12px rgba(96, 165, 250, 0.8); }
.stack__row:nth-child(2) .stack__dot { background: #7DD3FC; }
.stack__row:nth-child(3) .stack__dot { background: #A5B4FC; }
.stack__row:nth-child(4) .stack__dot { background: var(--gold-400); box-shadow: 0 0 12px rgba(240, 176, 23, 0.7); }
.stack__label b { font-size: 15px; font-weight: 600; color: var(--text-hi); letter-spacing: 0.02em; }
.stack__label small { display: block; font-size: 11px; letter-spacing: 0.14em; color: var(--text-dim); font-family: var(--font-num); text-transform: uppercase; }
.stack__chips { display: flex; flex-wrap: wrap; gap: 8px; }

.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin-top: 52px; counter-reset: step; }
.step { position: relative; padding-top: 30px; }
.step::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), var(--line-soft));
}
.step::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1.5px solid var(--brand-400);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}
.step__n { font-family: var(--font-num); font-size: 12px; letter-spacing: 0.18em; color: var(--gold-400); }
.step h4 { margin: 8px 0 8px; font-size: 16px; font-weight: 600; color: var(--text-hi); }
.step p { font-size: 13.5px; color: var(--text-mute); line-height: 1.75; }

/* ---------- 11. 数据与事实 ---------- */
.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 48px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--card-bd);
  background: var(--line-soft);
}
.fact {
  padding: clamp(22px, 2.6vw, 34px);
  background: var(--ink-850);
  transition: background 0.4s var(--ease);
}
.theme-light .fact { background: #fff; }
.fact:hover { background: var(--ink-800); }
.theme-light .fact:hover { background: #F6F9FF; }
.fact__n {
  font-family: var(--font-num);
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-hi);
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.fact__n small { font-size: 14px; font-weight: 500; letter-spacing: 0; color: var(--brand-300); }
.fact__t { margin-top: 10px; font-size: 14px; color: var(--text-hi); font-weight: 500; }
.fact__d { margin-top: 4px; font-size: 12.5px; color: var(--text-dim); }

/* ---------- 12. 常见问题 ---------- */
.faq { margin-top: 44px; display: grid; gap: 12px; max-width: 900px; }
.faq__item {
  border: 1px solid var(--card-bd);
  border-radius: var(--r-md);
  background: var(--card-bg);
  overflow: hidden;
  transition: border-color 0.4s var(--ease);
}
.faq__item[open] { border-color: var(--line-strong); }
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px clamp(18px, 2.4vw, 26px);
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text-hi);
  cursor: pointer;
  list-style: none;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q svg { width: 18px; height: 18px; flex: none; color: var(--brand-300); transition: transform 0.4s var(--ease-out); }
.faq__item[open] .faq__q svg { transform: rotate(45deg); }
.faq__a { padding: 0 clamp(18px, 2.4vw, 26px) 22px; font-size: 14.5px; line-height: 1.9; color: var(--text-mute); }

/* ---------- 13. 行动号召 ---------- */
.cta {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  background:
    radial-gradient(ellipse 90% 140% at 12% 0%, rgba(37, 99, 235, 0.34), transparent 62%),
    radial-gradient(ellipse 70% 120% at 96% 100%, rgba(240, 176, 23, 0.14), transparent 60%),
    linear-gradient(160deg, #0B1424, #070C18);
  padding: clamp(36px, 5vw, 68px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
}
.cta h2 { font-size: clamp(26px, 3vw, 40px); }
.cta p { margin-top: 14px; color: var(--text-mute); font-size: 15px; max-width: 52ch; }
.cta__acts { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 14. 页脚 ---------- */
.footer {
  position: relative;
  background: var(--ink-950);
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(52px, 6vw, 80px);
  overflow: hidden;
}
.footer__main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(36px, 4vw, 56px);
}
.footer__about p { margin-top: 18px; font-size: 13.5px; line-height: 1.9; color: var(--text-dim); max-width: 34ch; }
.footer__col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-hi);
  margin-bottom: 16px;
}
.footer__col ul { display: grid; gap: 11px; }
.footer__col a, .footer__col span {
  font-size: 13.5px;
  color: var(--text-mute);
  transition: color 0.3s var(--ease);
}
.footer__col a:hover { color: var(--brand-300); }
.footer__bottom {
  border-top: 1px solid var(--line-soft);
  padding-block: 22px 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  font-size: 12.5px;
  color: var(--text-dim);
}
.footer__legal { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; }
.footer__legal a:hover { color: var(--brand-300); }
.footer__glow {
  position: absolute;
  left: 50%;
  bottom: -70%;
  width: 90vw;
  height: 60vw;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(37, 99, 235, 0.16), transparent 62%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- 15. 子页页头 ---------- */
.page-hero {
  position: relative;
  padding-top: calc(var(--nav-h) + clamp(52px, 7vw, 88px));
  padding-bottom: clamp(44px, 5vw, 68px);
  background:
    radial-gradient(ellipse 90% 90% at 84% -20%, rgba(37, 99, 235, 0.26), transparent 62%),
    var(--ink-950);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.page-hero h1 { font-size: clamp(30px, 4.2vw, 52px); margin-top: 16px; }
.page-hero .lead { margin-top: 20px; }
.crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}
.crumb a:hover { color: var(--brand-300); }
.crumb svg { width: 12px; height: 12px; }

/* ---------- 16. 长文排版 ---------- */
.prose { max-width: 820px; }
.prose h2 { font-size: clamp(20px, 2.2vw, 26px); color: var(--text-hi); margin: 44px 0 14px; font-weight: 600; letter-spacing: -0.01em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 17px; color: var(--text-hi); margin: 26px 0 10px; font-weight: 600; }
.prose p, .prose li { font-size: 14.8px; line-height: 1.95; color: var(--text-mute); }
.prose p + p { margin-top: 14px; }
.prose ul { display: grid; gap: 9px; margin: 14px 0; }
.prose ul li { position: relative; padding-left: 18px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-400);
}
.prose .note {
  margin: 22px 0;
  padding: 18px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold-500);
  background: rgba(255, 255, 255, 0.03);
  font-size: 13.8px;
  line-height: 1.9;
  color: var(--text-mute);
}
.prose strong { color: var(--text-hi); font-weight: 600; }

/* 信息表 */
.info-table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 14px; }
.info-table th, .info-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
.info-table th {
  width: 172px;
  font-weight: 500;
  color: var(--text-dim);
  font-size: 13.5px;
  white-space: nowrap;
}
.info-table td { color: var(--text); line-height: 1.8; }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }
.info-card {
  border: 1px solid var(--card-bd);
  border-radius: var(--r-lg);
  background: var(--card-bg);
  padding: 8px clamp(16px, 2vw, 26px);
  margin-top: 36px;
}

/* ---------- 17. 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr); gap: 24px; margin-top: 48px; }
.talk {
  position: relative;
  border-radius: var(--r-xl);
  border: 1px solid var(--card-bd);
  background:
    radial-gradient(ellipse 90% 120% at 100% 0%, rgba(37, 99, 235, 0.2), transparent 60%),
    var(--card-bg);
  padding: clamp(26px, 3vw, 40px);
  overflow: hidden;
}
.talk h3 { font-size: 20px; color: var(--text-hi); }
.talk > p { margin-top: 10px; font-size: 14px; color: var(--text-mute); line-height: 1.85; }
.wx-list { margin-top: 26px; display: grid; gap: 14px; }
.wx {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.wx:hover { border-color: rgba(37, 99, 235, 0.45); background: rgba(37, 99, 235, 0.07); }
.wx__ico {
  width: 40px; height: 40px; flex: none;
  border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, rgba(37, 99, 235, 0.28), rgba(37, 99, 235, 0.08));
  color: var(--brand-200);
}
.wx__ico svg { width: 20px; height: 20px; }
.wx__body { display: grid; gap: 2px; min-width: 0; }
.wx__role { font-size: 12px; letter-spacing: 0.08em; color: var(--text-dim); }
.wx__id { font-family: var(--font-num); font-size: 16.5px; letter-spacing: 0.03em; color: var(--text-hi); }
.wx__copy {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-mute);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.wx__copy:hover { color: var(--brand-200); border-color: rgba(37, 99, 235, 0.5); background: rgba(37, 99, 235, 0.1); }
.wx__copy svg { width: 14px; height: 14px; }
.wx__copy.is-done { color: #6EE7B7; border-color: rgba(110, 231, 183, 0.4); }

.side-card {
  border-radius: var(--r-xl);
  border: 1px solid var(--card-bd);
  background: var(--card-bg);
  padding: clamp(24px, 2.8vw, 34px);
}
.side-card h4 { font-size: 15px; color: var(--text-hi); font-weight: 600; display: flex; align-items: center; gap: 9px; }
.side-card h4 svg { width: 17px; height: 17px; color: var(--gold-400); }
.side-card + .side-card { margin-top: 20px; }
.side-list { margin-top: 16px; display: grid; gap: 13px; }
.side-list li { display: flex; gap: 11px; font-size: 13.8px; line-height: 1.8; color: var(--text-mute); }
.side-list li b { color: var(--text-hi); font-weight: 500; }
.side-list li svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--brand-300); }

/* ---------- 18. 404 ---------- */
.err {
  min-height: 78vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: calc(var(--nav-h) + 60px) var(--gutter) 80px;
  background: radial-gradient(ellipse 70% 70% at 50% 0%, rgba(37, 99, 235, 0.2), transparent 60%), var(--ink-950);
}
.err__code {
  font-family: var(--font-num);
  font-size: clamp(84px, 16vw, 180px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.05em;
  background: linear-gradient(160deg, #FFFFFF 20%, rgba(96, 165, 250, 0.5) 70%, transparent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.err p { margin-top: 18px; color: var(--text-mute); }

/* ---------- 19. 滚动进场 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: 1fr; }
  .orbit { max-width: 440px; margin-top: 12px; }
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bento > .card:nth-child(1), .bento > .card:nth-child(4) { grid-column: span 2; }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 34px; }
  .footer__main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
  .cta { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  :root { --nav-h: 64px; }
  .nav__menu { display: none; }
  .nav__burger { display: grid; }
  .sol-grid { grid-template-columns: 1fr; }
  .stack__row { grid-template-columns: 1fr; gap: 14px; }
  .bento .feature { grid-template-columns: 1fr; }
  .bento .feature .card__art { max-width: 240px; }
  .sec-head--split { grid-template-columns: 1fr; align-items: start; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .bento { grid-template-columns: 1fr; }
  .bento > .card:nth-child(1), .bento > .card:nth-child(4) { grid-column: auto; }
  .steps { grid-template-columns: 1fr; }
  .step { padding-top: 24px; padding-left: 22px; }
  .step::before { top: 0; bottom: 0; left: 4px; right: auto; width: 1px; height: auto; background: linear-gradient(180deg, var(--line-strong), var(--line-soft)); }
  .step::after { top: 4px; left: 0; }
  .facts { grid-template-columns: 1fr; }
  .footer__main { grid-template-columns: 1fr; gap: 30px; }
  .hero__meta { gap: 10px 20px; font-size: 12.5px; }
  .orbit__node { font-size: 11.5px; height: 32px; padding: 0 11px; }
  .orbit__node:nth-of-type(2) { right: -1%; }
  .orbit__node:nth-of-type(5) { left: -1%; }
  .marquee__track { gap: 30px; }
  .marquee__item { gap: 30px; font-size: 13px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .info-table th { width: 108px; font-size: 13px; }
  .info-table th, .info-table td { padding: 12px 0; }
  .info-card { padding-inline: 16px; }
}

/* ---------- 21. 无障碍与省电 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .nav, .drawer, .marquee, .cta, .footer__glow { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ==========================================================================
   子页组件
   ========================================================================== */

/* 方案详情条目 */
.detail {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(22px, 3vw, 48px);
  padding-block: clamp(34px, 4vw, 54px);
  border-top: 1px solid var(--line-soft);
  align-items: start;
}
.detail:first-of-type { border-top: 0; padding-top: 0; }
.detail__head { display: flex; gap: 16px; align-items: flex-start; }
.detail__no {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-400);
  padding-top: 8px;
  flex: none;
}
.detail h2 { font-size: clamp(21px, 2.3vw, 28px); color: var(--text-hi); font-weight: 600; letter-spacing: -0.01em; line-height: 1.35; }
.detail__sum { margin-top: 14px; font-size: 14.8px; line-height: 1.9; color: var(--text-mute); }
.detail__list { display: grid; gap: 12px; margin-top: 22px; }
.detail__list li { display: flex; gap: 11px; font-size: 14.3px; line-height: 1.8; color: var(--text-mute); }
.detail__list li svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--brand-300); }
.detail__list li b { color: var(--text-hi); font-weight: 500; }

/* 侧栏信息面板 */
.panel {
  border-radius: var(--r-lg);
  border: 1px solid var(--card-bd);
  background: var(--card-bg);
  padding: clamp(20px, 2.4vw, 28px);
}
.panel__t {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-hi);
  margin-bottom: 6px;
}
.panel__t svg { width: 16px; height: 16px; color: var(--brand-300); }
.panel__rows { display: grid; }
.panel__rows > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 13.3px;
  color: var(--text-dim);
}
.panel__rows > div:last-child { border-bottom: 0; padding-bottom: 0; }
.panel__rows > div b { color: var(--text-hi); font-weight: 500; text-align: right; }

/* 三列说明带 */
.band { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 44px; }
.band .card p { font-size: 14px; }

/* 检查清单 */
.checklist { display: grid; gap: 11px; margin-top: 18px; }
.checklist li { display: flex; gap: 10px; font-size: 14px; line-height: 1.8; color: var(--text-mute); }
.checklist li svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--gold-400); }

/* 引用块 */
.quote {
  margin-top: 40px;
  padding: clamp(24px, 3vw, 36px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand-500);
  background: linear-gradient(120deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.02));
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
}
.quote b { color: var(--text-hi); font-weight: 600; }

/* 横向滚动技术栈 */
.chips-wrap { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
.chip {
  font-size: 13px;
  padding: 7px 13px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background 0.3s var(--ease);
}
.chip:hover { border-color: rgba(37, 99, 235, 0.5); color: var(--brand-200); background: rgba(37, 99, 235, 0.1); }

@media (max-width: 900px) {
  .detail { grid-template-columns: 1fr; }
  .band { grid-template-columns: 1fr; }
}

/* 通用栅格 */
.g2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.g4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 1080px) {
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .g2, .g4 { grid-template-columns: 1fr; }
}

/* 轨道图注释 */
.orbit__cap {
  margin-top: 6px;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}
.orbit__cap::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  margin-right: 9px;
  vertical-align: middle;
  background: linear-gradient(90deg, transparent, var(--gold-500));
}
.hero__visual { display: grid; }

/* 段落序号眉题 */
.eyebrow--idx { gap: 12px; }
.eyebrow--idx b {
  font-family: var(--font-num);
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

/* 刻度尺分隔线 */
.ruler {
  height: 12px;
  border-block: 1px solid var(--line-soft);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 24px);
  background-size: 24px 5px;
  background-position: 0 0;
  background-repeat: repeat-x;
  opacity: 0.5;
}

/* 微信二维码联系人卡 */
.wxq {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.wxq + .wxq { margin-top: 14px; }
.wxq:hover { border-color: rgba(37, 99, 235, 0.42); background: rgba(37, 99, 235, 0.06); }
.wxq__qr {
  display: block;
  width: 132px;
  height: 132px;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 22px -12px rgba(2, 8, 26, 0.75), 0 0 0 1px rgba(255, 255, 255, 0.14);
}
.wxq__qr img { width: 100%; height: 100%; object-fit: contain; }
.wxq__body { min-width: 0; display: grid; gap: 5px; }
.wxq__name {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text-hi);
  letter-spacing: 0.02em;
}
.wxq__name small {
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}
.wxq__role { font-size: 12.5px; color: var(--brand-200); letter-spacing: 0.04em; }
.wxq__id {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--text-mute);
  letter-spacing: 0.03em;
  word-break: break-all;
}
.wxq .wx__copy { margin: 8px 0 0; justify-self: start; }
.wxq__tip { margin-top: 4px; font-size: 11.5px; color: var(--text-dim); }

@media (max-width: 520px) {
  .wxq { grid-template-columns: 108px minmax(0, 1fr); gap: 14px; padding: 13px; }
  .wxq__qr { width: 108px; height: 108px; }
  .wxq__name { font-size: 15.5px; }
}


/* ==========================================================================
   主题系统
   —— 主题一（默认）：现有深色主题，保留深底 + 浅色节奏带的对比
   —— 主题二：珍珠白（html[data-theme="pearl"]），全站暖白，同构换肤
   切换入口在导航栏右侧，选择记入 localStorage。
   ========================================================================== */

/* 节奏带：由令牌控制，避免出现割裂的观感 */
.section--band { background: var(--ink-850); }

/* ---------- 珍珠白主题令牌 ---------- */
[data-theme="pearl"] {
  color-scheme: light;

  /* 底色：暖白珍珠 */
  --ink-950: #FBFAF6;
  --ink-900: #F7F6F1;
  --ink-850: #EFEDE5;
  --ink-800: #FFFFFF;
  --ink-750: #F3F2EB;
  --ink-700: #E8E6DD;

  /* 文字：近黑带一点冷，与暖白底形成克制对比 */
  --text-hi: #101720;
  --text: #3F4855;
  --text-mute: #5E6978;
  --text-dim: #5B677C;

  /* 品牌与金色在小字上需要更深一档才够对比度 */
  --brand-200: #1D4ED8;
  --brand-300: #1D4ED8;
  --gold-300: #A2700A;
  --gold-400: #B57C08;

  /* 线条与表面 */
  --line: rgba(18, 28, 44, 0.14);
  --line-soft: rgba(18, 28, 44, 0.075);
  --line-strong: rgba(18, 28, 44, 0.24);
  --card-bg: linear-gradient(162deg, #FFFFFF, #FCFBF6);
  --card-bd: rgba(18, 28, 44, 0.10);
  --card-hd: rgba(18, 28, 44, 0.20);

  /* 阴影：暖灰、低对比，珍珠白最怕脏阴影 */
  --sh-1: 0 2px 10px rgba(28, 32, 40, 0.06);
  --sh-2: 0 18px 44px -26px rgba(28, 32, 40, 0.22);
  --sh-3: 0 40px 90px -50px rgba(28, 32, 40, 0.24);
  --sh-brand: 0 18px 40px -22px rgba(29, 78, 216, 0.36);

  /* 节奏带 */
  --band-light: #FFFFFF;
}

/* ---------- 珍珠白主题：局部硬编码色值覆盖 ---------- */
[data-theme="pearl"] body::before { opacity: 0.22; mix-blend-mode: multiply; }

[data-theme="pearl"] .nav.is-scrolled {
  background: rgba(251, 250, 246, 0.88);
  border-bottom-color: var(--line-soft);
}
[data-theme="pearl"] .drawer { background: rgba(251, 250, 246, 0.985); }
[data-theme="pearl"] .nav__burger { background: rgba(255, 255, 255, 0.8); }
[data-theme="pearl"] .nav__burger span { background: var(--text-hi); }

[data-theme="pearl"] .hero {
  background:
    radial-gradient(ellipse 120% 80% at 78% -10%, rgba(37, 99, 235, 0.13), transparent 62%),
    radial-gradient(ellipse 90% 60% at 8% 4%, rgba(29, 78, 216, 0.10), transparent 60%),
    var(--ink-950);
}
[data-theme="pearl"] .page-hero {
  background:
    radial-gradient(ellipse 90% 90% at 84% -20%, rgba(37, 99, 235, 0.13), transparent 62%),
    var(--ink-950);
}
[data-theme="pearl"] .aurora span { opacity: 0.26; }
[data-theme="pearl"] .aurora span:nth-child(3) { opacity: 0.16; }
[data-theme="pearl"] .grid-bg { opacity: 0.8; }

[data-theme="pearl"] .hero h1 em {
  background: linear-gradient(100deg, #1D4ED8 10%, #A2700A 96%);
  -webkit-background-clip: text;
  background-clip: text;
}
[data-theme="pearl"] .hero__badge { background: rgba(255, 255, 255, 0.86); }
[data-theme="pearl"] .hero__badge b { color: var(--brand-600); }

/* 轨道图：属性色值用 CSS 覆盖（CSS 声明优先于 presentation attribute） */
[data-theme="pearl"] .orbit__ring { stroke: rgba(18, 28, 44, 0.16); }
[data-theme="pearl"] .orbit__ring--dash { stroke: rgba(18, 28, 44, 0.22); }
[data-theme="pearl"] .orbit__svg [stroke] { stroke: rgba(29, 78, 216, 0.28); }
[data-theme="pearl"] .orbit__svg [fill="#F0B017"],
[data-theme="pearl"] .orbit__svg [fill="#60A5FA"],
[data-theme="pearl"] .orbit__svg [fill="#93C5FD"] { fill: #1D4ED8; }
[data-theme="pearl"] .orbit__core {
  background: linear-gradient(160deg, #FFFFFF, #EFF3FB);
  box-shadow:
    0 0 0 1px rgba(18, 28, 44, 0.07),
    0 22px 48px -22px rgba(29, 78, 216, 0.42),
    0 0 70px -12px rgba(96, 165, 250, 0.55);
}
[data-theme="pearl"] .orbit__node {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 18px -12px rgba(28, 32, 40, 0.4);
}
[data-theme="pearl"] .orbit__node svg { color: var(--brand-600); }
[data-theme="pearl"] .orbit__node--gold svg { color: var(--gold-400); }

[data-theme="pearl"] .brand__mark {
  background: linear-gradient(150deg, #FFFFFF, #F0F4FC);
  box-shadow: 0 6px 16px -8px rgba(29, 78, 216, 0.38), inset 0 0 0 1px rgba(18, 28, 44, 0.09);
}

[data-theme="pearl"] .btn--ghost { background: #FFFFFF; }
[data-theme="pearl"] .btn--ghost:hover { background: #FFFFFF; color: var(--brand-600); }

[data-theme="pearl"] .card::before {
  background: radial-gradient(220px circle at var(--mx, 50%) var(--my, 0%),
    rgba(29, 78, 216, 0.09), transparent 70%);
}
[data-theme="pearl"] .card__ico {
  background: linear-gradient(150deg, rgba(37, 99, 235, 0.14), rgba(37, 99, 235, 0.04));
  border-color: rgba(29, 78, 216, 0.16);
}

[data-theme="pearl"] .tag,
[data-theme="pearl"] .chip { background: rgba(255, 255, 255, 0.86); }
[data-theme="pearl"] .step::after { background: var(--ink-900); }
[data-theme="pearl"] .fact:hover { background: var(--ink-750); }

/* 深色 CTA 卡在珍珠白主题里改成浅色描边卡，保持实体感 */
[data-theme="pearl"] .cta {
  background:
    radial-gradient(ellipse 90% 140% at 12% 0%, rgba(37, 99, 235, 0.12), transparent 62%),
    radial-gradient(ellipse 70% 120% at 96% 100%, rgba(181, 124, 8, 0.10), transparent 60%),
    linear-gradient(160deg, #FFFFFF, #F6F4EC);
  box-shadow: var(--sh-2);
}

[data-theme="pearl"] .footer__glow {
  background: radial-gradient(circle, rgba(29, 78, 216, 0.10), transparent 62%);
}

[data-theme="pearl"] .wx,
[data-theme="pearl"] .wxq { background: rgba(255, 255, 255, 0.9); }
[data-theme="pearl"] .wx:hover,
[data-theme="pearl"] .wxq:hover { background: rgba(237, 242, 255, 0.95); }
[data-theme="pearl"] .wx__ico {
  background: linear-gradient(150deg, rgba(37, 99, 235, 0.16), rgba(37, 99, 235, 0.05));
  color: var(--brand-600);
}
[data-theme="pearl"] .wxq__qr {
  box-shadow: 0 6px 18px -12px rgba(28, 32, 40, 0.45), 0 0 0 1px rgba(18, 28, 44, 0.10);
}
[data-theme="pearl"] .talk {
  background:
    radial-gradient(ellipse 90% 120% at 100% 0%, rgba(37, 99, 235, 0.10), transparent 60%),
    var(--card-bg);
}

[data-theme="pearl"] .prose .note,
[data-theme="pearl"] .quote { background: rgba(255, 255, 255, 0.88); }
[data-theme="pearl"] .err {
  background:
    radial-gradient(ellipse 70% 70% at 50% 0%, rgba(37, 99, 235, 0.12), transparent 60%),
    var(--ink-950);
}
[data-theme="pearl"] .err__code {
  background: linear-gradient(160deg, #101720 18%, rgba(29, 78, 216, 0.6) 72%, transparent);
  -webkit-background-clip: text;
  background-clip: text;
}

/* 浅色节奏带（方案区）在珍珠白主题里改用纯白，与暖白底形成细微层次 */
.solutions { background: var(--band-light, #F6F8FD); }
[data-theme="pearl"] .solutions { border-color: rgba(18, 28, 44, 0.07); }
[data-theme="pearl"] .sol { box-shadow: 0 1px 3px rgba(28, 32, 40, 0.05); }

/* ---------- 主题切换按钮 ---------- */
.theme-btn {
  flex: none;
  width: 40px;
  height: 40px;
  margin-left: 4px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-mute);
  display: grid;
  place-items: center;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease), transform 0.4s var(--ease-out);
}
[data-theme="pearl"] .theme-btn { background: rgba(255, 255, 255, 0.86); }
.theme-btn:hover {
  color: var(--brand-300);
  border-color: var(--brand-400);
  transform: translateY(-1px);
}
[data-theme="pearl"] .theme-btn:hover { color: var(--brand-600); }
.theme-btn svg { width: 18px; height: 18px; }
.theme-btn .theme-btn__moon { display: none; }
[data-theme="pearl"] .theme-btn .theme-btn__sun { display: none; }
[data-theme="pearl"] .theme-btn .theme-btn__moon { display: block; }

@media (max-width: 860px) {
  .nav__burger { margin-left: 8px; }
  .theme-btn { margin-left: auto; }
}

/* 抽屉里的主题入口 */
.drawer__theme {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 4px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  color: var(--text-hi);
}
.drawer__theme span small {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-top: 2px;
}
.drawer__theme .switch {
  width: 52px;
  height: 30px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: rgba(150, 180, 235, 0.12);
  position: relative;
  flex: none;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease);
}
.drawer__theme .switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(2, 8, 26, 0.4);
  transition: transform 0.35s var(--ease-out), background 0.35s var(--ease);
}
[data-theme="pearl"] .drawer__theme .switch { background: var(--brand-600); border-color: var(--brand-600); }
[data-theme="pearl"] .drawer__theme .switch::after { transform: translateX(22px); background: #fff; }

/* 珍珠白主题：金色小字加深，保证 12px 也达到 AA（装饰性金色点不影响） */
[data-theme="pearl"] .step__n,
[data-theme="pearl"] .detail__no { color: #8A5E06; }

[data-theme="pearl"] .checklist li svg { color: #8A5E06; }

/* 珍珠白主题：白底卡片的边界比深色底更依赖描边，这里加一档可见度 */
[data-theme="pearl"] .card,
[data-theme="pearl"] .panel,
[data-theme="pearl"] .side-card,
[data-theme="pearl"] .info-card,
[data-theme="pearl"] .faq__item,
[data-theme="pearl"] .stack__row { border-color: rgba(18, 28, 44, 0.13); }

[data-theme="pearl"] .section--band .card,
[data-theme="pearl"] .section--band .panel { border-color: rgba(18, 28, 44, 0.10); }

/* 珍珠白主题：把首屏轨道图"托"出来 —— 浅底上需要更明确的层次 */
.orbit { isolation: isolate; }
.orbit::before {
  content: "";
  position: absolute;
  inset: -6%;
  z-index: -1;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 255, 255, 0.9), transparent 62%),
    radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.10), transparent 68%);
}
[data-theme="pearl"] .orbit::before { opacity: 1; }

[data-theme="pearl"] .orbit__ring { stroke: rgba(18, 28, 44, 0.22); }
[data-theme="pearl"] .orbit__ring--dash { stroke: rgba(18, 28, 44, 0.30); }
[data-theme="pearl"] .orbit__svg [stroke] { stroke: rgba(29, 78, 216, 0.4); }
[data-theme="pearl"] .orbit__node {
  border-color: rgba(18, 28, 44, 0.16);
  color: var(--text-hi);
  font-weight: 500;
}
[data-theme="pearl"] .orbit__node--gold { border-color: rgba(138, 94, 6, 0.4); }
[data-theme="pearl"] .orbit__cap { color: var(--text-mute); }

/* 轨道图锚点连线：让五个节点"挂"在轨道结构上，而不是漂浮 */
.orbit__links line {
  stroke: rgba(96, 165, 250, 0.42);
  stroke-width: 1;
  stroke-dasharray: 2 5;
  stroke-linecap: round;
}
.orbit__links circle {
  fill: rgba(150, 195, 255, 0.85);
}

[data-theme="pearl"] .orbit__links line { stroke: rgba(29, 78, 216, 0.42); }
[data-theme="pearl"] .orbit__links circle { fill: #1D4ED8; }
[data-theme="pearl"] .orbit__ring { stroke: rgba(18, 28, 44, 0.26); }
[data-theme="pearl"] .orbit__ring--dash { stroke: rgba(18, 28, 44, 0.34); }

/* 珍珠白主题：标题高亮改成同色系渐变，避免一行里蓝金双跳 */
[data-theme="pearl"] .hero h1 em {
  background: linear-gradient(100deg, #2563EB 6%, #123A9E 96%);
  -webkit-background-clip: text;
  background-clip: text;
}

/* 珍珠白主题：跑马灯与注释行加深一档 */
[data-theme="pearl"] .marquee__item { color: var(--text); }

/* ==========================================================================
   节奏带统一：深色主题下不再出现整块亮白，消除 "翻到白页刺眼" 的跳变
   所有区块统一走令牌；浅色只在「珍珠白主题」里成立。
   ========================================================================== */

/* 深色主题：方案区与 FAQ 区都是深色节奏带，仅靠明度差分层 */
.section--band {
  background: var(--ink-850);
}
.solutions {
  background: linear-gradient(180deg, var(--ink-850), var(--ink-800) 55%, var(--ink-850));
  border-block: 1px solid var(--line-soft);
}

/* 方案卡：改为随主题走的表面，而不是固定白卡 */
.sol {
  background: var(--card-bg);
  border: 1px solid var(--card-bd);
  box-shadow: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.sol:hover {
  border-color: rgba(37, 99, 235, 0.42);
  box-shadow: var(--sh-2);
}
.sol__idx { color: var(--brand-300); }
.sol__idx::after { background: linear-gradient(90deg, var(--line-strong), transparent); }
.sol h3 { color: var(--text-hi); }
.sol p { color: var(--text-mute); }
.sol__list li { color: var(--text); }
.sol__list li svg { color: var(--brand-300); }
.sol__ico {
  background: linear-gradient(150deg, rgba(37, 99, 235, 0.24), rgba(37, 99, 235, 0.06));
  border: 1px solid var(--line);
  color: var(--brand-200);
}

/* 珍珠白主题：方案区回到纯白，卡片用白底 + 极浅描边，绝不出现深色块 */
[data-theme="pearl"] .solutions {
  background: #FFFFFF;
  border-block-color: rgba(18, 28, 44, 0.07);
}
[data-theme="pearl"] .sol {
  background: linear-gradient(162deg, #FFFFFF, #FBFAF5);
  border-color: rgba(18, 28, 44, 0.10);
  box-shadow: 0 1px 3px rgba(28, 32, 40, 0.05);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
[data-theme="pearl"] .sol:hover {
  border-color: rgba(29, 78, 216, 0.30);
  box-shadow: 0 22px 46px -30px rgba(28, 32, 40, 0.28);
}
[data-theme="pearl"] .sol__ico {
  background: linear-gradient(150deg, #EEF4FF, #DDE9FF);
  border-color: rgba(29, 78, 216, 0.12);
  color: var(--brand-600);
}
[data-theme="pearl"] .sol__idx { color: var(--brand-600); }
[data-theme="pearl"] .sol__list li svg { color: var(--brand-600); }

/* FAQ：暗底下的卡片保留一点透光，避免"贴片感" */
.faq__item {
  background: var(--card-bg);
  border-color: var(--card-bd);
}
.faq__item[open] {
  border-color: rgba(37, 99, 235, 0.38);
  background: linear-gradient(162deg, rgba(37, 99, 235, 0.10), rgba(255, 255, 255, 0.02));
}
[data-theme="pearl"] .faq__item[open] {
  background: linear-gradient(162deg, #FFFFFF, #F7FAFF);
  border-color: rgba(29, 78, 216, 0.30);
}
.faq__q svg { color: var(--brand-300); }
[data-theme="pearl"] .faq__q svg { color: var(--brand-600); }

/* 分区之间加一道极细过渡，视觉上"暗→暗"有节奏又不跳 */
.section + .section--band,
.section--band + .section { box-shadow: inset 0 1px 0 var(--line-soft); }

/* ==========================================================================
   移动端适配增强
   ── 触控目标 ≥40px、最小字号 ≥12px、底部快捷联系条、安全区适配
   ========================================================================== */

/* 底部快捷条默认隐藏（桌面端不用） */
.mobar { display: none; }

@media (max-width: 860px) {
  /* ---- 触控目标 ---- */
  .footer__col li a,
  .footer__col li span {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
  }
  .footer__col ul { gap: 0; }
  .footer__legal { gap: 0 16px; }
  .footer__legal a,
  .footer__legal a[href] {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
  }
  .crumb a,
  .crumb span { display: inline-flex; align-items: center; min-height: 40px; }
  .wx__copy { height: 40px; padding: 0 15px; }
  .faq__q { min-height: 56px; }
  .link-arrow { min-height: 40px; }
  .prose a { text-decoration: underline; text-underline-offset: 3px; }

  /* ---- 最小字号 ---- */
  .tag { font-size: 12px; padding: 5px 11px; }
  .chip { font-size: 12.5px; }
  .wxq__tip { font-size: 12px; }
  .brand__en { font-size: 11px; letter-spacing: 0.16em; }
  .marquee__item { font-size: 13px; }
  .eyebrow { font-size: 12px; letter-spacing: 0.12em; }

  /* ---- 正文行高与可读性 ---- */
  .lead { font-size: 15.5px; line-height: 1.85; }
  .card p, .sol p, .faq__a { font-size: 14.5px; }
  .prose p, .prose li { font-size: 15px; line-height: 1.95; }

  /* ---- 表格窄屏：改为上下排布，避免挤压 ---- */
  .info-table th,
  .info-table td { display: block; width: auto; }
  .info-table th { padding-bottom: 2px; border-bottom: 0; }
  .info-table td { padding-top: 0; padding-bottom: 14px; }

  /* ---- 底部快捷联系条 ---- */
  .mobar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 70;
    display: flex;
    gap: 10px;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
    background: rgba(6, 10, 20, 0.9);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border-top: 1px solid var(--line-soft);
    box-shadow: 0 -12px 30px -22px rgba(0, 0, 0, 0.8);
  }
  [data-theme="pearl"] .mobar {
    background: rgba(251, 250, 246, 0.94);
  }
  .mobar__btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    height: 46px;
    border-radius: var(--r-pill);
    border: 1px solid var(--line-strong);
    font-size: 14.5px;
    font-weight: 500;
    color: var(--text-hi);
    background: rgba(255, 255, 255, 0.04);
    transition: transform 0.3s var(--ease-out);
  }
  [data-theme="pearl"] .mobar__btn { background: #fff; }
  .mobar__btn:active { transform: scale(0.97); }
  .mobar__btn svg { width: 17px; height: 17px; flex: none; }
  .mobar__btn--brand {
    border: 0;
    color: #fff;
    background: linear-gradient(132deg, var(--brand-500), #1B45C4 88%);
    box-shadow: 0 10px 24px -14px rgba(37, 99, 235, 0.9);
  }

  /* 给底部条让出空间，避免遮住页脚内容 */
  body { padding-bottom: calc(66px + env(safe-area-inset-bottom, 0px)); }

  /* 抽屉打开时让出底部条 */
  .drawer { padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px)); }
}

/* 横屏矮屏（手机横放）不占过多高度 */
@media (max-width: 860px) and (max-height: 480px) {
  .mobar { display: none; }
  body { padding-bottom: 0; }
}

/* 移动端：面包屑文字链补足横向触控宽度 */
@media (max-width: 860px) {
  .crumb a, .crumb span { padding-inline: 5px; }
  .crumb a + svg { margin-inline: -2px; }
}

/* 移动端收尾细节 */
html { -webkit-tap-highlight-color: transparent; }
.btn,
.mobar__btn,
.wx__copy,
.theme-btn,
.nav__burger,
.faq__q,
.drawer__link { touch-action: manipulation; }

@media (max-width: 480px) {
  .hero__badge {
    flex-wrap: wrap;
    justify-content: center;
    height: auto;
    padding: 7px 13px;
    row-gap: 2px;
    line-height: 1.5;
    text-align: center;
  }
}

@media (max-width: 400px) {
  .orbit { max-width: 330px; }
  .orbit__node { font-size: 11px; height: 30px; padding: 0 10px; gap: 6px; }
  .orbit__core { width: 34%; }
  .hero__meta { gap: 8px 16px; }
  .steps { row-gap: 26px; }
}

/* 联系页二维码：手机上放大到可长按识别/跨设备扫描的尺寸，并改为上下居中排布 */
@media (max-width: 520px) {
  .wxq {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: 14px;
    padding: 18px 14px;
  }
  .wxq__qr { width: 190px; height: 190px; }
  .wxq__body { justify-items: center; gap: 6px; }
  .wxq__name { justify-content: center; }
  .wxq .wx__copy { margin-top: 6px; }
  .wxq__tip { font-size: 12.5px; }
}