/* ============================================================
   小安智医 · 官网样式
   主题色：科技蓝 ｜ 白色背景 ｜ 全扁平设计
   ============================================================ */

:root {
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --cyan: #22d3ee;
  --cyan-600: #0ea5e9;
  --ink: #0e1f45;
  --muted: #55678c;
  --line: #e4ebf7;
  --white: #ffffff;
  --shadow: 0 24px 60px -24px rgba(29, 78, 216, .25);
  --radius: 22px;
}

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

html {
  scroll-snap-type: y proximity;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

::selection { background: var(--blue-100); color: var(--blue-700); }

/* ============ 通用布局 ============ */

.page {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  padding: 104px 5vw 72px;
  overflow: hidden;
}

/* 极淡的科技蓝光晕，保持白色主背景 */
.page::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(560px 380px at 88% 8%, rgba(37, 99, 235, .06), transparent 70%),
    radial-gradient(520px 360px at 6% 92%, rgba(34, 211, 238, .05), transparent 70%);
}

.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.wrap.center { text-align: center; }

/* ============ 顶栏 ============ */

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 4vw;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid rgba(228, 235, 247, .9);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .5px;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
}

.brand small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 2px;
}

.topnav {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.topnav a {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--muted);
  transition: color .25s, background .25s;
}

.topnav a:hover { color: var(--blue-700); background: var(--blue-50); }

.topnav a.active {
  color: var(--blue-700);
  background: var(--blue-100);
  font-weight: 600;
}

/* ============ 按钮 ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 32px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .5px;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s, background .25s, color .25s;
  border: 1.5px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: #fff;
  box-shadow: 0 14px 30px -10px rgba(37, 99, 235, .55);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 38px -10px rgba(37, 99, 235, .6);
}

.btn-ghost {
  background: #fff;
  color: var(--blue-700);
  border-color: var(--blue-100);
  box-shadow: 0 8px 22px -12px rgba(29, 78, 216, .25);
}

.btn-ghost:hover {
  border-color: var(--blue-400);
  background: var(--blue-50);
  transform: translateY(-2px);
}

.btn-sm { padding: 10px 22px; font-size: 14px; }

/* ============ 右侧圆点菜单 ============ */

.dotnav {
  position: fixed;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dotnav button {
  position: relative;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--blue-400);
  background: #fff;
  cursor: pointer;
  padding: 0;
  transition: transform .25s, background .25s, border-color .25s, box-shadow .25s;
}

.dotnav button:hover { transform: scale(1.35); }

.dotnav button.active {
  background: var(--blue-600);
  border-color: var(--blue-600);
  transform: scale(1.45);
  box-shadow: 0 0 0 5px rgba(37, 99, 235, .15);
}

.dotnav button span {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  white-space: nowrap;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-700);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 20px -8px rgba(29, 78, 216, .3);
  padding: 5px 12px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}

.dotnav button:hover span {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* ============ 滚动提示 ============ */

.scroll-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 1px;
  transition: opacity .4s;
}

.scroll-hint em { font-style: normal; }

.mouse {
  width: 22px;
  height: 34px;
  border: 2px solid var(--blue-400);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.mouse i {
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--blue-600);
  animation: wheel 1.6s infinite;
}

@keyframes wheel {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(8px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

.scroll-hint.hidden { opacity: 0; pointer-events: none; }

/* ============ 标题体系 ============ */

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2.5px;
  color: var(--blue-600);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.kicker i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .18);
}

h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.22;
  letter-spacing: .5px;
  margin-bottom: 18px;
}

.grad {
  background: linear-gradient(120deg, var(--blue-600) 10%, var(--cyan-600) 55%, var(--cyan) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--muted);
  max-width: 560px;
}

.shead.center { text-align: center; }
.shead.center .lead { margin: 0 auto; }

.shead { margin-bottom: 40px; }
.shead.center { margin-bottom: 52px; }

/* ============ 扁平图标基础 ============ */

.ic {
  width: 56px;
  height: 56px;
  display: block;
}

.fic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 92px;
  height: 92px;
  border-radius: 26px;
  background: linear-gradient(145deg, var(--blue-50), var(--blue-100));
  border: 1px solid #d3e3fd;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .9);
  transition: transform .3s, box-shadow .3s;
}

.fic.sm {
  width: 58px;
  height: 58px;
  border-radius: 17px;
  flex: none;
}

.fic.sm .ic { width: 32px; height: 32px; }

.fic.tx {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  vertical-align: -10px;
  margin-right: 8px;
}

.fic.tx .ic { width: 26px; height: 26px; }

/* ============ 01 首页 ============ */

.hero-grid {
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  align-items: center;
  gap: 4vw;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--blue-700);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 999px;
  padding: 8px 18px;
  margin-bottom: 26px;
}

.badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, .18);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(34, 197, 94, .18); }
  50% { box-shadow: 0 0 0 7px rgba(34, 197, 94, .08); }
}

.hero h1 {
  font-size: clamp(56px, 7.2vw, 96px);
  line-height: 1.04;
  letter-spacing: 2px;
  font-weight: 900;
}

.hero-sub {
  margin-top: 14px;
  font-size: clamp(20px, 2.3vw, 30px);
  font-weight: 700;
  letter-spacing: 6px;
  background: linear-gradient(120deg, var(--ink), var(--blue-600));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  margin-top: 22px;
  font-size: clamp(15px, 1.35vw, 17.5px);
  line-height: 1.9;
  color: var(--muted);
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 46px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.hero-stats div {
  flex: 1;
  padding-right: 18px;
}

.hero-stats div + div { border-left: 1px solid var(--line); padding-left: 22px; }

.hero-stats dt {
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 800;
  color: var(--blue-600);
}

.hero-stats dd {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .5px;
}

/* 右侧粒子 + 数字人 */

.hero-visual {
  position: relative;
  height: min(74vh, 640px);
  min-height: 460px;
}

.avatar-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(210px, 21vw, 300px);
  aspect-ratio: 1;
}

.hero-avatar {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-shadow:
    0 30px 70px -18px rgba(37, 99, 235, .45),
    0 0 0 10px rgba(255, 255, 255, .85);
  animation: bob 5s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px dashed rgba(37, 99, 235, .35);
  animation: spin 26s linear infinite;
}

.ring.r2 {
  inset: -26px;
  border-color: rgba(34, 211, 238, .3);
  animation-duration: 40s;
  animation-direction: reverse;
}

@keyframes spin { to { transform: rotate(360deg); } }

.chip-float {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue-700);
  background: rgba(255, 255, 255, .92);
  border: 1px solid var(--blue-100);
  border-radius: 999px;
  padding: 8px 16px 8px 9px;
  box-shadow: 0 14px 32px -12px rgba(29, 78, 216, .35);
  backdrop-filter: blur(6px);
}

.chip-float .ic { width: 26px; height: 26px; }

.cf1 { top: 8%; left: 2%; animation: bob 6s .3s ease-in-out infinite; }
.cf2 { top: 22%; right: 0; animation: bob 7s .8s ease-in-out infinite; }
.cf3 { bottom: 12%; left: 6%; animation: bob 6.5s .5s ease-in-out infinite; }
.cf4 { bottom: 4%; right: 4%; animation: bob 7.2s 1.1s ease-in-out infinite; }

/* ============ 02 功能矩阵 ============ */

.fgrid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.fcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 20px 26px;
  text-align: center;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.fcard:hover {
  transform: translateY(-6px);
  border-color: var(--blue-100);
  box-shadow: var(--shadow);
}

.fcard:hover .fic {
  transform: scale(1.08) rotate(-3deg);
  box-shadow: 0 14px 28px -10px rgba(37, 99, 235, .35);
}

.fcard h3 {
  margin-top: 18px;
  font-size: 17px;
  font-weight: 700;
}

.fcard p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 03-08 图文分屏 ============ */

.split {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  align-items: center;
  gap: 5vw;
}

.split.rev .shead { order: 2; }
.split.rev .stage { order: 1; }

.feats {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.feats li {
  display: flex;
  align-items: center;
  gap: 16px;
}

.feats strong { display: block; font-size: 16px; font-weight: 700; }
.feats em {
  display: block;
  font-style: normal;
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 3px;
  line-height: 1.6;
}

.stage {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ============ 手机壳（钛银白，非黑色） ============ */

.phone {
  position: relative;
  width: min(292px, 26vw);
  border-radius: 54px;
  padding: 11px;
  background: linear-gradient(160deg, #fbfcfe 0%, #e2e8f2 42%, #cdd6e4 100%);
  box-shadow:
    0 40px 80px -28px rgba(29, 78, 216, .35),
    0 4px 14px rgba(15, 31, 69, .08),
    inset 0 1px 2px rgba(255, 255, 255, .95);
  border: 1px solid #bfc9da;
}

.phone::after { /* 蓝色信号带装饰 */
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: 18%;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, .45), transparent);
  pointer-events: none;
}

.phone-btn {
  position: absolute;
  width: 3.5px;
  border-radius: 3px;
  background: linear-gradient(180deg, #c3cddf, #9fadc4);
}

.pb-vol { left: -4.5px; top: 120px; height: 56px; box-shadow: 0 -64px 0 -0.5px #c3cddf; }
.pb-pow { right: -4.5px; top: 150px; height: 76px; }

.phone-screen {
  position: relative;
  border-radius: 43px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #d5dcea;
}

.phone-screen img {
  display: block;
  width: 100%;
  aspect-ratio: 828 / 1560;
  object-fit: cover;
  object-position: top center;
}

.phone-island {
  position: absolute;
  top: 9px;
  left: 50%;
  transform: translateX(-50%);
  width: 74px;
  height: 9px;
  border-radius: 6px;
  background: linear-gradient(90deg, #3a4a68, #22304e);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
}

.float-a { animation: bob 6s ease-in-out infinite; }
.float-b { animation: bob 7s .6s ease-in-out infinite; }

/* ============ 06 提醒与慢病 ============ */

.rgrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.rcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 26px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.rcard:hover {
  transform: translateY(-6px);
  border-color: var(--blue-100);
  box-shadow: var(--shadow);
}

.rcard h3 { margin-top: 20px; font-size: 19px; font-weight: 700; }

.rcard p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ============ 09 三端适配 ============ */

.devgrid {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 4vw;
  flex-wrap: wrap;
}

.device {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.device strong {
  font-size: 17px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
}

.device > span {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .5px;
}

.phone.mini { width: 172px; border-radius: 40px; padding: 8px; }
.phone.mini .phone-screen { border-radius: 32px; }
.phone.mini .phone-island { width: 52px; height: 7px; top: 7px; }

.pad {
  width: min(330px, 30vw);
  border-radius: 30px;
  padding: 13px;
  background: linear-gradient(160deg, #fbfcfe, #dde4ef 55%, #c9d3e2);
  border: 1px solid #bfc9da;
  box-shadow:
    0 34px 70px -26px rgba(29, 78, 216, .32),
    inset 0 1px 2px rgba(255, 255, 255, .95);
}

.pad-screen {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid #d5dcea;
  background: #fff;
}

.pad-screen img {
  display: block;
  width: 100%;
  aspect-ratio: 828 / 1100;
  object-fit: cover;
  object-position: top center;
}

.monitor {
  width: min(420px, 36vw);
  border-radius: 18px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #c9d3e2;
  box-shadow: 0 34px 70px -26px rgba(29, 78, 216, .32);
}

.monitor-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: linear-gradient(180deg, #f4f7fc, #e8edf6);
  border-bottom: 1px solid #dce3ef;
}

.monitor-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.monitor-bar i:nth-child(1) { background: #93c5fd; }
.monitor-bar i:nth-child(2) { background: #60a5fa; }
.monitor-bar i:nth-child(3) { background: var(--blue-600); }

.monitor-bar b {
  margin-left: 10px;
  flex: 1;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 12px;
  text-align: left;
}

.monitor-screen { overflow: hidden; }

.monitor-screen img {
  display: block;
  width: 100%;
  aspect-ratio: 828 / 620;
  object-fit: cover;
  object-position: top center;
}

.adaptive-note {
  margin: 40px auto 0;
  max-width: 640px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  background: var(--blue-50);
  border: 1px dashed var(--blue-400);
  border-radius: 14px;
  padding: 14px 22px;
  line-height: 1.8;
}

/* ============ 10 技术架构 ============ */

.tgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.tcard {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.tcard:hover {
  transform: translateY(-6px);
  border-color: var(--blue-100);
  box-shadow: var(--shadow);
}

.tcard h3 { margin-top: 18px; font-size: 18px; font-weight: 700; }

.tcard p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.tech-chips {
  margin-top: 34px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.tech-chips span {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--blue-700);
  background: #fff;
  border: 1px solid var(--blue-100);
  border-radius: 999px;
  padding: 8px 20px;
  box-shadow: 0 6px 16px -8px rgba(29, 78, 216, .25);
}

/* ============ 11 CTA / 页脚 ============ */

.cta .wrap { max-width: 720px; }

.cta-logo {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  box-shadow: 0 26px 60px -18px rgba(37, 99, 235, .5);
  margin-bottom: 30px;
  animation: bob 5s ease-in-out infinite;
}

.center-cta { justify-content: center; }

.foot {
  margin-top: 64px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}

.foot-sep {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--blue-400);
}

/* ============================================================
   PAD 端适配（≤ 1100px）
   ============================================================ */

@media (max-width: 1100px) {
  .topnav { display: none; }

  .fgrid { grid-template-columns: repeat(3, 1fr); }
  .rgrid { grid-template-columns: repeat(2, 1fr); }
  .tgrid { grid-template-columns: repeat(2, 1fr); }

  .ic { width: 64px; height: 64px; }
  .fic.sm .ic { width: 36px; height: 36px; }

  .split { gap: 5vw; }
  .phone { width: min(272px, 34vw); }
}

/* ============================================================
   手机端适配（≤ 760px）
   ============================================================ */

@media (max-width: 760px) {
  .page { padding: 92px 6vw 64px; }

  .topbar { padding: 12px 5vw; gap: 12px; }
  .brand { font-size: 18px; }
  .brand img { width: 38px; height: 38px; }

  .dotnav { right: 10px; gap: 10px; }
  .dotnav button span { display: none; }

  .scroll-hint { display: none; }

  /* 首页：纵向堆叠，粒子画布移到上方 */
  .hero-grid { grid-template-columns: 1fr; gap: 26px; }
  .hero-visual {
    order: -1;
    height: 44vh;
    min-height: 300px;
  }
  .hero h1 { text-align: center; }
  .hero-sub { text-align: center; letter-spacing: 4px; }
  .hero-desc { margin-left: auto; margin-right: auto; text-align: center; }
  .hero-cta { justify-content: center; }
  .hero-stats { flex-wrap: wrap; gap: 18px 0; }
  .hero-stats div { flex: 1 1 40%; }
  .hero-stats div + div { border-left: none; padding-left: 0; }

  /* 图标在手机上放大 */
  .ic { width: 76px; height: 76px; }
  .fic { width: 108px; height: 108px; border-radius: 30px; }
  .fic.sm { width: 66px; height: 66px; border-radius: 19px; }
  .fic.sm .ic { width: 42px; height: 42px; }
  .fic.tx { width: 52px; height: 52px; }
  .fic.tx .ic { width: 30px; height: 30px; }

  .fgrid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .fcard { padding: 22px 12px 20px; border-radius: 18px; }
  .fcard h3 { font-size: 15.5px; margin-top: 14px; }
  .fcard p { font-size: 12px; }

  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.rev .shead { order: 0; }
  .split.rev .stage { order: 1; }
  .shead { text-align: center; }
  .shead .lead { margin: 0 auto; }
  .feats li { text-align: left; }
  .feats { max-width: 420px; margin-left: auto; margin-right: auto; }

  /* 手机壳在手机上更宽更大 */
  .phone { width: min(320px, 78vw); }
  .phone.mini { width: 168px; }

  .rgrid { grid-template-columns: 1fr; gap: 16px; }
  .rcard { padding: 26px 24px; }

  .tgrid { grid-template-columns: 1fr; gap: 16px; }

  .devgrid { gap: 44px; }
  .pad { width: min(300px, 78vw); }
  .monitor { width: min(340px, 84vw); }

  h2 { font-size: clamp(26px, 7vw, 32px); }
  .btn { padding: 14px 26px; font-size: 15px; }

  .chip-float { font-size: 11.5px; padding: 6px 12px 6px 7px; }
  .chip-float .ic { width: 20px; height: 20px; }
  .cf1 { left: 2%; top: 4%; }
  .cf2 { right: 3%; top: 26%; }
}

/* ============ 真人医生双机位 ============ */

.stage.duo {
  gap: 0;
}

.duo .phone { width: min(258px, 23vw); }

.duo .duo-a {
  transform: translateY(26px) rotate(-3deg);
  z-index: 1;
  opacity: .98;
}

.duo .duo-b {
  margin-left: -84px;
  z-index: 2;
  position: relative;
  box-shadow:
    0 46px 90px -28px rgba(29, 78, 216, .42),
    0 4px 14px rgba(15, 31, 69, .08),
    inset 0 1px 2px rgba(255, 255, 255, .95);
}

@media (max-width: 760px) {
  .stage.duo { flex-direction: column; gap: 36px; }
  .duo .duo-a { transform: none; }
  .duo .duo-b { margin-left: 0; }
  .duo .phone { width: min(300px, 74vw); }
}

/* ============ CTA 二维码 ============ */

.qr-card {
  margin: 36px auto 0;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 26px 30px 22px;
  box-shadow: var(--shadow);
}

.qr-card img {
  width: 208px;
  height: 208px;
  border-radius: 16px;
  display: block;
}

.qr-card span {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 1px;
}

/* 减少动态 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}