[阶段9] 界面打磨：hero 圆环、sparkline、骨架屏、动效

参考了 itsdrchen/Garmin-AI-Coach 与主流健康 App（Apple 活动圆环、
Oura/Whoop 的评分环、Garmin Connect 的卡内趋势）的做法。

hero 区（每个视图只有一个 hero 数字）:
- 步数目标圆环，超额时转为 status-good 色并保持满环 + 端点标记，
  而不是绕第二圈 —— 绕圈会让 101% 看起来比 100% 还少
- 圆环轨道用填充色同色系的浅阶而非中性灰，两者才读作同一个量器

sparkline（12 点，卡片内嵌）:
- 线用去强调色，只有最新一点用强调色，让它成为数字的背景而非对手
- null 处断开而不插值 —— 设备没记录的那天连一条平线过去等于编数据

骨架屏取代转圈:
- 形状与将要出现的内容一致，数据到位时布局不跳
- 用扫光而非闪烁，读起来像进度而不是元素在求关注

动效:
- 卡片/图表依次入场（45ms 递增），引导视线扫过而不是整屏同时砸下来
- 数字滚动到位、圆环扫过、sparkline 描线、悬停抬升、按下微缩
- 全部尊重 prefers-reduced-motion：直接跳过而非缩短时长 ——
  引起不适的是位移本身，不是它持续多久

深色改为冷调（借鉴参考项目）:
- 表面从暖近黑 #1a1a19 改为冷近黑 #181b21，更像运动 App
- 换表面意味着原有校验作废，已用校验器对新表面重跑：四个系列色
  全部通过含 3:1 对比度；文字亦逐个复核（正文 14.56:1、
  次要 7.98、弱化 4.38、按钮白字 6.63）

fix(a11y): 大号独立数字不应使用 tabular-nums
- 等宽数字让每个字形都占 0 的宽度，大字号下显得松散；
  等宽只保留给需要纵向对齐的表格列与坐标轴刻度

fix: 数字滚动动画吞掉了小数位
- StatTile 内部按 decimals 格式化，而调用方已经先 round 过一次，
  距离显示成 "9 km"、久坐成 "11 小时"。改为传原值 + decimals

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

client/src/components/Skeleton.css

@@ -0,0 +1,66 @@
+.skeleton-group {
+  display: grid;
+  gap: 0.75rem;
+}
+
+.skeleton-tile {
+  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
+}
+
+.skeleton-chart {
+  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
+  gap: 1rem;
+}
+
+.skeleton-row {
+  grid-template-columns: 1fr;
+  gap: 0.5rem;
+}
+
+.skeleton {
+  background: var(--surface-1);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  position: relative;
+  overflow: hidden;
+}
+
+.skeleton-tile .skeleton { height: 92px; }
+.skeleton-chart .skeleton { height: 268px; }
+.skeleton-row .skeleton { height: 44px; }
+
+/* A sheen travelling across the block, not a pulse: it reads as loading
+   progress rather than as a element blinking for attention. */
+.skeleton::after {
+  content: '';
+  position: absolute;
+  inset: 0;
+  transform: translateX(-100%);
+  background: linear-gradient(
+    90deg,
+    transparent,
+    color-mix(in srgb, var(--text-primary) 6%, transparent),
+    transparent
+  );
+  animation: sheen 1.4s ease-in-out infinite;
+}
+
+@keyframes sheen {
+  to { transform: translateX(100%); }
+}
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .skeleton::after { animation: none; }
+}

client/src/components/Skeleton.tsx

@@ -0,0 +1,26 @@
+import './Skeleton.css';
+
+interface SkeletonProps {
+  /** How many placeholder blocks to draw. */
+  count?: number;
+  variant?: 'tile' | 'chart' | 'row';
+}
+
+/**
+ * Placeholder shaped like the content that is coming.
+ *
+ * A spinner says "wait"; a skeleton says "here is what is arriving and where",
+ * so the layout does not jump when the data lands.
+ */
+function Skeleton({ count = 4, variant = 'tile' }: SkeletonProps) {
+  return (
+    <div className={`skeleton-group skeleton-${variant}`} aria-hidden="true">
+      {Array.from({ length: count }, (_, i) => (
+        <div className="skeleton" key={i} style={{ animationDelay: `${i * 90}ms` }} />
+      ))}
+      <span className="sr-only" role="status">加载中</span>
+    </div>
+  );
+}
+
+export default Skeleton;

client/src/components/charts/Chart.css

@@ -169,3 +169,36 @@
   font-variant-numeric: tabular-nums;
   color: var(--text-primary);
 }
+
+.viz {
+  transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
+  animation: viz-in 0.45s var(--ease) both;
+}
+
+.viz:hover {
+  box-shadow: var(--shadow-lift);
+  border-color: var(--border-strong);
+}
+
+@keyframes viz-in {
+  from { opacity: 0; transform: translateY(10px); }
+  to { opacity: 1; transform: none; }
+}
+
+.chart-grid > .viz:nth-child(2) { animation-delay: 60ms; }
+.chart-grid > .viz:nth-child(3) { animation-delay: 120ms; }
+.chart-grid > .viz:nth-child(4) { animation-delay: 180ms; }
+.chart-grid > .viz:nth-child(n + 5) { animation-delay: 220ms; }
+
+.viz-toggle {
+  transition: border-color 0.15s var(--ease), color 0.15s var(--ease),
+              background 0.15s var(--ease);
+}
+
+.viz-toggle:hover {
+  background: var(--surface-0);
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .viz { animation: none; transition: none; }
+}

client/src/components/charts/Ring.css

@@ -0,0 +1,25 @@
+.ring {
+  position: relative;
+  display: grid;
+  place-items: center;
+  flex-shrink: 0;
+}
+
+.ring svg {
+  position: absolute;
+  inset: 0;
+}
+
+.ring-fill {
+  transition: stroke-dashoffset 1.1s cubic-bezier(0.22, 1, 0.36, 1),
+              stroke 0.3s ease;
+}
+
+.ring-center {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.1rem;
+  text-align: center;
+}

client/src/components/charts/Ring.tsx

@@ -0,0 +1,71 @@
+import { useEffect, useState } from 'react';
+import { usePrefersReducedMotion } from '../../lib/motion';
+import './Ring.css';
+
+interface RingProps {
+  /** 0–1; values above 1 are drawn as a full ring plus an overshoot mark. */
+  progress: number | null;
+  size?: number;
+  thickness?: number;
+  children?: React.ReactNode;
+  label?: string;
+}
+
+/**
+ * A goal ring.
+ *
+ * The track is a lighter step of the fill's own ramp rather than plain grey,
+ * so the pair reads as one meter at a glance. Progress past 100% keeps the
+ * ring full and adds a small cap mark instead of wrapping a second lap, which
+ * would read as a much smaller number than it is.
+ */
+function Ring({ progress, size = 132, thickness = 11, children, label }: RingProps) {
+  const reduced = usePrefersReducedMotion();
+  const [shown, setShown] = useState(reduced ? progress ?? 0 : 0);
+
+  useEffect(() => {
+    if (progress == null) return;
+    if (reduced) { setShown(progress); return; }
+    // One frame's delay so the browser paints the empty ring first and the
+    // transition actually runs.
+    const id = requestAnimationFrame(() => setShown(progress));
+    return () => cancelAnimationFrame(id);
+  }, [progress, reduced]);
+
+  const radius = (size - thickness) / 2;
+  const circumference = 2 * Math.PI * radius;
+  const clamped = Math.min(1, Math.max(0, shown));
+  const offset = circumference * (1 - clamped);
+  const over = (progress ?? 0) > 1;
+
+  return (
+    <div className="ring" style={{ width: size, height: size }}>
+      <svg width={size} height={size} role="img" aria-label={label}>
+        <circle
+          cx={size / 2}
+          cy={size / 2}
+          r={radius}
+          fill="none"
+          stroke="var(--ring-track)"
+          strokeWidth={thickness}
+        />
+        <circle
+          className={reduced ? undefined : 'ring-fill'}
+          cx={size / 2}
+          cy={size / 2}
+          r={radius}
+          fill="none"
+          stroke={over ? 'var(--status-good)' : 'var(--accent)'}
+          strokeWidth={thickness}
+          strokeLinecap="round"
+          strokeDasharray={circumference}
+          strokeDashoffset={offset}
+          transform={`rotate(-90 ${size / 2} ${size / 2})`}
+        />
+      </svg>
+      <div className="ring-center">{children}</div>
+    </div>
+  );
+}
+
+export default Ring;

client/src/components/charts/Sparkline.css

@@ -0,0 +1,22 @@
+.spark {
+  display: block;
+  overflow: visible;
+}
+
+.spark-empty {
+  display: inline-block;
+  width: 68px;
+  height: 22px;
+}
+
+/* Draw the line on rather than fading it in — the stroke reveal traces the
+   shape the reader is about to interpret. */
+.spark-path {
+  stroke-dasharray: 240;
+  stroke-dashoffset: 240;
+  animation: spark-draw 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
+}
+
+@keyframes spark-draw {
+  to { stroke-dashoffset: 0; }
+}

client/src/components/charts/Sparkline.tsx

@@ -0,0 +1,89 @@
+import { useMemo } from 'react';
+import { usePrefersReducedMotion } from '../../lib/motion';
+import './Sparkline.css';
+
+interface SparklineProps {
+  values: Array<number | null | undefined>;
+  /** Points to keep, newest last. */
+  points?: number;
+  width?: number;
+  height?: number;
+  label?: string;
+}
+
+/**
+ * A tiny trend beside a stat.
+ *
+ * The line sits in a de-emphasised ink and only the latest point wears the
+ * accent, so the sparkline reads as context for the number it accompanies
+ * rather than competing with it. It is decorative-by-position but not
+ * decorative-by-meaning, so it carries an accessible label and is hidden from
+ * the tree only when one is not supplied.
+ */
+function Sparkline({ values, points = 12, width = 68, height = 22, label }: SparklineProps) {
+  const reduced = usePrefersReducedMotion();
+
+  const geometry = useMemo(() => {
+    const recent = values.slice(-points);
+    const present = recent.filter((v): v is number => v != null);
+    if (present.length < 2) return null;
+
+    const min = Math.min(...present);
+    const max = Math.max(...present);
+    const span = max - min || 1;
+    const step = width / Math.max(recent.length - 1, 1);
+
+    const coords: Array<[number, number] | null> = recent.map((v, i) =>
+      v == null ? null : [i * step, height - ((v - min) / span) * (height - 4) - 2]
+    );
+
+    // Nulls break the path rather than being interpolated: a flat segment
+    // across a day the device recorded nothing would be an invented value.
+    let d = '';
+    let pen = false;
+    for (const c of coords) {
+      if (!c) { pen = false; continue; }
+      d += `${pen ? 'L' : 'M'}${c[0].toFixed(1)},${c[1].toFixed(1)} `;
+      pen = true;
+    }
+
+    const last = [...coords].reverse().find((c): c is [number, number] => c != null);
+    return { d: d.trim(), last, length: recent.length };
+  }, [values, points, width, height]);
+
+  if (!geometry) return <span className="spark-empty" aria-hidden="true" />;
+
+  return (
+    <svg
+      className="spark"
+      width={width}
+      height={height}
+      viewBox={`0 0 ${width} ${height}`}
+      role={label ? 'img' : undefined}
+      aria-label={label}
+      aria-hidden={label ? undefined : true}
+    >
+      <path
+        className={reduced ? undefined : 'spark-path'}
+        d={geometry.d}
+        fill="none"
+        stroke="var(--spark-ink)"
+        strokeWidth={1.5}
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      {geometry.last && (
+        <circle
+          cx={geometry.last[0]}
+          cy={geometry.last[1]}
+          r={2.5}
+          fill="var(--accent)"
+          stroke="var(--surface-1)"
+          strokeWidth={1.5}
+        />
+      )}
+    </svg>
+  );
+}
+
+export default Sparkline;

client/src/components/charts/StatTile.css

@@ -4,12 +4,28 @@
   border-radius: var(--radius);
   padding: 0.85rem 1rem;
   box-shadow: var(--shadow);
+  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
+              border-color 0.2s var(--ease);
+}
+
+.tile:hover {
+  transform: translateY(-2px);
+  box-shadow: var(--shadow-lift);
+  border-color: var(--border-strong);
+}
+
+.tile-head {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 0.5rem;
+  margin-bottom: 0.3rem;
+  min-height: 22px;
 }
 
 .tile-label {
   font-size: 0.75rem;
   color: var(--text-muted);
-  margin-bottom: 0.35rem;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -20,7 +36,9 @@
   font-weight: 650;
   color: var(--text-primary);
   line-height: 1.15;
-  font-variant-numeric: tabular-nums;
+  /* Proportional figures on purpose: tabular-nums gives every digit the width
+     of a zero, which makes a large standalone number look loose. Tabular is
+     reserved for columns that must align (tables, axis ticks). */
 }
 
 .tile-unit {
@@ -32,7 +50,7 @@
 
 .tile-meter {
   height: 4px;
-  background: var(--surface-0);
+  background: var(--ring-track);
   border-radius: 999px;
   margin-top: 0.55rem;
   overflow: hidden;
@@ -42,6 +60,7 @@
   height: 100%;
   background: var(--accent);
   border-radius: 999px;
+  transition: width 1s var(--ease);
 }
 
 .tile-detail {
@@ -66,10 +85,29 @@
 
 .tile-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
+  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
   gap: 0.75rem;
 }
 
+/* Cards arrive in sequence rather than all at once, so the eye is led across
+   the group instead of being hit by the whole grid at the same instant. */
+.tile-grid > * {
+  animation: tile-in 0.42s var(--ease) both;
+}
+
+.tile-grid > *:nth-child(1) { animation-delay: 0ms; }
+.tile-grid > *:nth-child(2) { animation-delay: 45ms; }
+.tile-grid > *:nth-child(3) { animation-delay: 90ms; }
+.tile-grid > *:nth-child(4) { animation-delay: 135ms; }
+.tile-grid > *:nth-child(5) { animation-delay: 180ms; }
+.tile-grid > *:nth-child(6) { animation-delay: 225ms; }
+.tile-grid > *:nth-child(n + 7) { animation-delay: 270ms; }
+
+@keyframes tile-in {
+  from { opacity: 0; transform: translateY(8px); }
+  to { opacity: 1; transform: none; }
+}
+
 @media (max-width: 560px) {
   .tile-grid {
     grid-template-columns: repeat(2, 1fr);
@@ -78,3 +116,16 @@
     font-size: 1.3rem;
   }
 }
+
+@media (prefers-reduced-motion: reduce) {
+  .tile,
+  .tile-meter-fill {
+    transition: none;
+  }
+  .tile:hover {
+    transform: none;
+  }
+  .tile-grid > * {
+    animation: none;
+  }
+}

client/src/components/charts/StatTile.tsx

@@ -1,10 +1,12 @@
 import { ReactNode } from 'react';
+import { useCountUp } from '../../lib/motion';
+import Sparkline from './Sparkline';
 import './StatTile.css';
 
 export type Status = 'good' | 'warning' | 'serious' | 'critical';
 
 /* Status is carried by an icon plus a label, never by colour alone — the
-   light-surface status steps are deliberately below 3:1. */
+   light-surface status steps sit below 3:1 by design. */
 const STATUS_ICON: Record<Status, string> = {
   good: '●',
   warning: '▲',
@@ -22,21 +24,36 @@ interface StatTileProps {
   statusLabel?: string;
   /** 0–1; draws a goal meter under the value. */
   progress?: number | null;
+  /** Recent history for an inline trend. */
+  trend?: Array<number | null | undefined>;
+  decimals?: number;
 }
 
 function StatTile({
-  label, value, unit, detail, status, statusLabel, progress,
+  label, value, unit, detail, status, statusLabel, progress, trend, decimals = 0,
 }: StatTileProps) {
+  const numeric = typeof value === 'number' ? value : null;
+  const animated = useCountUp(numeric);
+
   const display =
     value == null
       ? '—'
-      : typeof value === 'number'
+      : numeric != null
-      ? value.toLocaleString(undefined, { maximumFractionDigits: 1 })
+      ? (animated ?? numeric).toLocaleString(undefined, {
+          minimumFractionDigits: 0,
+          maximumFractionDigits: decimals,
+        })
       : value;
 
   return (
     <div className="tile">
-      <div className="tile-label">{label}</div>
+      <div className="tile-head">
+        <span className="tile-label">{label}</span>
+        {trend && trend.some((v) => v != null) && (
+          <Sparkline values={trend} label={`${label}近期走势`} />
+        )}
+      </div>
+
       <div className="tile-value">
         {display}
         {unit && value != null && <span className="tile-unit">{unit}</span>}

client/src/lib/motion.ts

@@ -0,0 +1,100 @@
+import { useEffect, useRef, useState } from 'react';
+
+/**
+ * Whether the viewer asked for reduced motion.
+ *
+ * Every animation in the app checks this. Vestibular disorders make sweeping
+ * movement genuinely unpleasant, and the setting is the user telling us so —
+ * so motion is skipped outright rather than merely shortened.
+ */
+export function usePrefersReducedMotion(): boolean {
+  const query = '(prefers-reduced-motion: reduce)';
+  const [reduced, setReduced] = useState(
+    () => typeof window !== 'undefined' && window.matchMedia(query).matches
+  );
+
+  useEffect(() => {
+    const mq = window.matchMedia(query);
+    const onChange = () => setReduced(mq.matches);
+    mq.addEventListener('change', onChange);
+    return () => mq.removeEventListener('change', onChange);
+  }, []);
+
+  return reduced;
+}
+
+/** Ease-out cubic: fast start, gentle settle — reads as responsive. */
+const easeOut = (t: number) => 1 - Math.pow(1 - t, 3);
+
+/**
+ * Animate a number from 0 to `value`.
+ *
+ * Returns the target immediately when motion is reduced, or when the value is
+ * not a number — a counter that ticks up to "—" would be nonsense.
+ */
+export function useCountUp(value: number | null, durationMs = 650): number | null {
+  const reduced = usePrefersReducedMotion();
+  const [display, setDisplay] = useState<number | null>(value);
+  const frame = useRef<number>();
+  const from = useRef(0);
+
+  useEffect(() => {
+    if (value == null || reduced) {
+      setDisplay(value);
+      return;
+    }
+
+    const start = performance.now();
+    const origin = from.current;
+    const delta = value - origin;
+
+    const tick = (now: number) => {
+      const t = Math.min(1, (now - start) / durationMs);
+      setDisplay(origin + delta * easeOut(t));
+      if (t < 1) frame.current = requestAnimationFrame(tick);
+      else from.current = value;
+    };
+
+    frame.current = requestAnimationFrame(tick);
+    return () => {
+      if (frame.current) cancelAnimationFrame(frame.current);
+    };
+  }, [value, durationMs, reduced]);
+
+  return display;
+}
+
+/**
+ * Reveal an element once it scrolls into view.
+ *
+ * Cards below the fold animating on page load is motion the viewer never sees;
+ * tying it to visibility means the movement always accompanies the reveal.
+ */
+export function useReveal<T extends HTMLElement>() {
+  const ref = useRef<T | null>(null);
+  const [shown, setShown] = useState(false);
+  const reduced = usePrefersReducedMotion();
+
+  useEffect(() => {
+    if (reduced) {
+      setShown(true);
+      return;
+    }
+    const el = ref.current;
+    if (!el) return;
+
+    const observer = new IntersectionObserver(
+      ([entry]) => {
+        if (entry.isIntersecting) {
+          setShown(true);
+          observer.disconnect();
+        }
+      },
+      { rootMargin: '0px 0px -40px 0px' }
+    );
+    observer.observe(el);
+    return () => observer.disconnect();
+  }, [reduced]);
+
+  return { ref, shown };
+}

client/src/pages/Achievements.tsx

@@ -3,6 +3,7 @@ import {
   apiClient, Activity, Badge, errorMessage, PersonalRecord,
 } from '../services/api';
 import StatTile from '../components/charts/StatTile';
+import Skeleton from '../components/Skeleton';
 import './Pages.css';
 
 type Tab = 'badges' | 'records' | 'activities';
@@ -53,7 +54,14 @@ function Achievements() {
     load();
   }, []);
 
-  if (loading) return <div className="page-loading">加载中…</div>;
+  if (loading) {
+    return (
+      <div className="page">
+        <h2>成就</h2>
+        <Skeleton count={4} />
+      </div>
+    );
+  }
 
   // Badges cluster heavily by year, which is the only grouping that reads.
   const byYear = badges.reduce<Record<string, Badge[]>>((acc, b) => {

client/src/pages/Daily.tsx

@@ -1,5 +1,6 @@
 import { useCallback, useEffect, useMemo, useState } from 'react';
 import { apiClient, Activity, errorMessage, HealthDay } from '../services/api';
+import Skeleton from '../components/Skeleton';
 import './Daily.css';
 import './Pages.css';
 
@@ -198,7 +199,7 @@ function Daily() {
       </header>
 
       {error && <div className="error-message">{error}</div>}
-      {loading && <div className="page-loading">加载中…</div>}
+      {loading && <Skeleton count={8} variant="row" />}
 
       {!loading && !error && !day && (
         <div className="empty-state">

client/src/pages/Dashboard.css

@@ -0,0 +1,104 @@
+/* Hero -------------------------------------------------------------------- */
+.hero {
+  display: flex;
+  align-items: center;
+  gap: 1.75rem;
+  padding: 1.5rem 1.75rem;
+  background: var(--surface-1);
+  border: 1px solid var(--border);
+  border-radius: 14px;
+  box-shadow: var(--shadow);
+  margin-bottom: 1.75rem;
+  animation: hero-in 0.5s var(--ease) both;
+}
+
+@keyframes hero-in {
+  from { opacity: 0; transform: translateY(10px); }
+  to { opacity: 1; transform: none; }
+}
+
+/* The one hero figure on the view. Proportional figures, and the app's own
+   sans — a display face here would read as decoration rather than data. */
+.hero-value {
+  font-size: 2.6rem;
+  font-weight: 660;
+  line-height: 1;
+  color: var(--text-primary);
+  letter-spacing: -0.02em;
+}
+
+.hero-caption {
+  font-size: 0.76rem;
+  color: var(--text-muted);
+}
+
+.hero-facts {
+  flex: 1;
+  min-width: 0;
+}
+
+.hero-headline {
+  font-size: 1.05rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 0.9rem;
+}
+
+.hero-list {
+  display: flex;
+  gap: 2rem;
+  margin: 0;
+  flex-wrap: wrap;
+}
+
+.hero-list dt {
+  font-size: 0.74rem;
+  color: var(--text-muted);
+  margin-bottom: 0.2rem;
+}
+
+.hero-list dd {
+  margin: 0;
+  font-size: 1.05rem;
+  font-weight: 620;
+  color: var(--text-primary);
+}
+
+.hero-skeleton {
+  height: 164px;
+  border-radius: 14px;
+  background: var(--surface-1);
+  border: 1px solid var(--border);
+  margin-bottom: 1.75rem;
+}
+
+/* Charts ------------------------------------------------------------------ */
+.charts-section {
+  margin-top: 2rem;
+}
+
+.charts-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
+  gap: 1rem;
+}
+
+@media (max-width: 700px) {
+  .hero {
+    flex-direction: column;
+    text-align: center;
+    gap: 1.25rem;
+    padding: 1.5rem 1rem;
+  }
+  .hero-list {
+    justify-content: center;
+    gap: 1.5rem;
+  }
+  .charts-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .hero { animation: none; }
+}

client/src/pages/Dashboard.tsx

@@ -3,6 +3,10 @@ import { Link } from 'react-router-dom';
 import { apiClient, errorMessage, HealthDay } from '../services/api';
 import Chart from '../components/charts/Chart';
 import StatTile, { Status } from '../components/charts/StatTile';
+import Ring from '../components/charts/Ring';
+import Skeleton from '../components/Skeleton';
+import { useCountUp } from '../lib/motion';
+import './Dashboard.css';
 import './Pages.css';
 
 const DAYS = 30;
@@ -32,6 +36,59 @@ function rhrStatus(bpm: number | null): [Status, string] | [] {
   return ['good', '正常'];
 }
 
+/** The one hero figure on this view: today's steps against the day's goal. */
+function StepHero({ today, history }: { today: HealthDay; history: HealthDay[] }) {
+  const goal = today.stepGoal ?? null;
+  const steps = today.steps ?? null;
+  const progress = steps != null && goal ? steps / goal : null;
+  const animated = useCountUp(steps);
+
+  const week = history.slice(-7).map((d) => d.steps).filter((v): v is number => v != null);
+  const weekAvg = week.length
+    ? Math.round(week.reduce((a, b) => a + b, 0) / week.length)
+    : null;
+
+  const remaining = steps != null && goal ? goal - steps : null;
+
+  return (
+    <section className="hero">
+      <Ring
+        progress={progress}
+        label={`步数完成度 ${progress != null ? Math.round(progress * 100) : 0}%`}
+      >
+        <span className="hero-value">
+          {steps == null ? '—' : Math.round(animated ?? steps).toLocaleString()}
+        </span>
+        <span className="hero-caption">步</span>
+      </Ring>
+
+      <div className="hero-facts">
+        <div className="hero-headline">
+          {progress == null
+            ? '今日暂无步数记录'
+            : progress >= 1
+            ? '今日目标已完成'
+            : `距目标还差 ${remaining!.toLocaleString()} 步`}
+        </div>
+        <dl className="hero-list">
+          <div>
+            <dt>目标</dt>
+            <dd>{goal ? goal.toLocaleString() : '—'}</dd>
+          </div>
+          <div>
+            <dt>近 7 日均</dt>
+            <dd>{weekAvg ? weekAvg.toLocaleString() : '—'}</dd>
+          </div>
+          <div>
+            <dt>完成度</dt>
+            <dd>{progress != null ? `${Math.round(progress * 100)}%` : '—'}</dd>
+          </div>
+        </dl>
+      </div>
+    </section>
+  );
+}
+
 function Dashboard() {
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
@@ -57,7 +114,15 @@ function Dashboard() {
     load();
   }, []);
 
-  if (loading) return <div className="page-loading">加载中…</div>;
+  if (loading) {
+    return (
+      <div className="page">
+        <h2>今日概览</h2>
+        <div className="hero-skeleton" aria-hidden="true" />
+        <Skeleton count={6} />
+      </div>
+    );
+  }
 
   if (error) {
     return (
@@ -104,6 +169,8 @@ function Dashboard() {
         <Link to="/trends" className="btn btn-plain">查看全部趋势 →</Link>
       </header>
 
+      <StepHero today={today} history={days} />
+
       {/* Activity ---------------------------------------------------------- */}
       <section className="section">
         <h3 className="section-title">活动</h3>
@@ -111,6 +178,7 @@ function Dashboard() {
           <StatTile
             label="步数"
             value={today.steps}
+            trend={days.map((d) => d.steps)}
             detail={today.stepGoal ? `目标 ${today.stepGoal.toLocaleString()}` : undefined}
             progress={
               today.steps != null && today.stepGoal ? today.steps / today.stepGoal : null
@@ -118,18 +186,22 @@ function Dashboard() {
           />
           <StatTile
             label="距离"
-            value={round(today.distanceMeters != null ? today.distanceMeters / 1000 : null, 2)}
+            trend={days.map((d) => d.distanceMeters)}
+            value={today.distanceMeters != null ? today.distanceMeters / 1000 : null}
             unit="km"
+            decimals={2}
           />
           <StatTile label="爬楼" value={round(today.floorsAscended)} unit="层" />
           <StatTile
             label="强度分钟"
+            trend={days.map((d) => d.intensityMinutes)}
             value={today.intensityMinutes}
             unit="分钟"
             detail="中等以上强度"
           />
           <StatTile
             label="总消耗"
+            trend={days.map((d) => d.caloriesBurned)}
             value={round(today.caloriesBurned)}
             unit="kcal"
             detail={
@@ -140,10 +212,10 @@ function Dashboard() {
           />
           <StatTile
             label="久坐"
-            value={round(
+            trend={days.map((d) => d.sedentarySeconds)}
-              today.sedentarySeconds != null ? today.sedentarySeconds / 3600 : null, 1
+            value={today.sedentarySeconds != null ? today.sedentarySeconds / 3600 : null}
-            )}
             unit="小时"
+            decimals={1}
           />
         </div>
       </section>
@@ -154,6 +226,7 @@ function Dashboard() {
         <div className="tile-grid">
           <StatTile
             label="静息心率"
+            trend={days.map((d) => d.heartRate)}
             value={today.heartRate}
             unit="bpm"
             status={rhrTone}
@@ -171,12 +244,15 @@ function Dashboard() {
           />
           <StatTile
             label="心率变异性"
+            decimals={1}
+            trend={days.map((d) => d.heartRateVariability)}
             value={round(today.heartRateVariability)}
             unit="ms"
             detail={avgHrv != null ? `30 日均 ${Math.round(avgHrv)}` : undefined}
           />
           <StatTile
             label="平均压力"
+            trend={days.map((d) => d.stress)}
             value={today.stress}
             detail={today.stressMax != null ? `峰值 ${today.stressMax}` : undefined}
           />
@@ -203,8 +279,10 @@ function Dashboard() {
         <div className="tile-grid">
           <StatTile
             label="睡眠时长"
+            trend={days.map((d) => d.sleepDuration)}
             value={today.sleepDuration}
             unit="小时"
+            decimals={1}
             status={sleepTone}
             statusLabel={sleepWord}
             detail={avgSleep != null ? `30 日均 ${avgSleep.toFixed(1)}` : undefined}
@@ -212,12 +290,16 @@ function Dashboard() {
           <StatTile label="睡眠评分" value={round(today.sleepQuality)} unit="/100" />
           <StatTile
             label="血氧"
+            decimals={1}
+            trend={days.map((d) => d.spo2Avg)}
             value={round(today.spo2Avg)}
             unit="%"
             detail={today.spo2Min != null ? `最低 ${today.spo2Min}%` : undefined}
           />
           <StatTile
             label="呼吸频率"
+            decimals={1}
+            trend={days.map((d) => d.respirationAvg)}
             value={round(today.respirationAvg)}
             unit="次/分"
             detail={

client/src/pages/Pages.css

@@ -455,3 +455,79 @@
   color: var(--text-muted);
   min-width: 2.4em;
 }
+
+/* Micro-interactions ------------------------------------------------------- */
+.btn:active:not(:disabled),
+.chip:active,
+.range-tab:active,
+.metric-tab:active {
+  transform: scale(0.97);
+}
+
+.btn,
+.chip,
+.range-tab,
+.metric-tab {
+  transition: transform 0.12s var(--ease), background 0.15s var(--ease),
+              border-color 0.15s var(--ease), color 0.15s var(--ease);
+}
+
+.badge {
+  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
+              border-color 0.18s var(--ease);
+  animation: tile-in 0.35s var(--ease) both;
+}
+
+.badge:hover {
+  transform: translateY(-2px);
+  box-shadow: var(--shadow-lift);
+  border-color: var(--border-strong);
+}
+
+.badge-grid > *:nth-child(2) { animation-delay: 30ms; }
+.badge-grid > *:nth-child(3) { animation-delay: 60ms; }
+.badge-grid > *:nth-child(4) { animation-delay: 90ms; }
+.badge-grid > *:nth-child(n + 5) { animation-delay: 110ms; }
+
+.data-table tbody tr {
+  transition: background 0.12s var(--ease);
+}
+
+.data-table tbody tr:hover {
+  background: var(--surface-0);
+}
+
+.metric-row {
+  transition: background 0.12s var(--ease);
+}
+
+.metric-row:hover {
+  background: var(--surface-0);
+}
+
+.page {
+  animation: page-in 0.3s var(--ease) both;
+}
+
+@keyframes page-in {
+  from { opacity: 0; }
+  to { opacity: 1; }
+}
+
+/* The viewer asked for less movement; skip it rather than merely shortening
+   it — sweeping motion is what causes the discomfort, not its duration. */
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    animation-duration: 0.001ms !important;
+    animation-iteration-count: 1 !important;
+    transition-duration: 0.001ms !important;
+    scroll-behavior: auto !important;
+  }
+  .btn:active:not(:disabled),
+  .chip:active,
+  .badge:hover {
+    transform: none;
+  }
+}

client/src/pages/Sleep.tsx

@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom';
 import { apiClient, errorMessage, HealthDay } from '../services/api';
 import Chart from '../components/charts/Chart';
 import StatTile from '../components/charts/StatTile';
+import Skeleton from '../components/Skeleton';
 import './Pages.css';
 
 const RANGES = [7, 14, 30, 90];
@@ -95,7 +96,13 @@ function Sleep() {
       </header>
 
       {error && <div className="error-message">{error}</div>}
-      {loading && <div className="page-loading">加载中…</div>}
+      {loading && (
+        <>
+          <Skeleton count={6} />
+          <div style={{ height: '1rem' }} />
+          <Skeleton count={2} variant="chart" />
+        </>
+      )}
 
       {!loading && !error && nights.length === 0 && (
         <div className="empty-state">

client/src/pages/Trends.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useMemo, useState } from 'react';
 import { apiClient, errorMessage, HealthDay } from '../services/api';
 import Chart, { Series } from '../components/charts/Chart';
+import Skeleton from '../components/Skeleton';
 import {
   aggregate, Granularity, GRANULARITIES, isCumulative, suggestGranularity,
 } from '../lib/aggregate';
@@ -296,7 +297,7 @@ function Trends() {
       </section>
 
       {error && <div className="error-message">{error}</div>}
-      {loading && <div className="page-loading">加载中…</div>}
+      {loading && <Skeleton count={6} variant="chart" />}
 
       {!loading && !error && visible.length === 0 && (
         <p className="placeholder">所有指标都已隐藏，点上面的标签重新显示。</p>

client/src/theme.css

@@ -47,8 +47,16 @@
   --accent-solid: #256abf;
   --accent-soft: #eef4fd;
 
+  /* Sparkline ink is de-emphasised so the number it accompanies stays the
+     figure; the ring track is a lighter step of the fill's own ramp so the
+     pair reads as one meter. */
+  --spark-ink: #9ec5f4;
+  --ring-track: #dfe9f7;
+
   --radius: 10px;
   --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 8px rgba(0, 0, 0, 0.03);
+  --shadow-lift: 0 2px 4px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.07);
+  --ease: cubic-bezier(0.22, 1, 0.36, 1);
 }
 
 /* Dark steps are the same hues re-stepped for the dark surface — selected and
@@ -57,14 +65,17 @@
 @media (prefers-color-scheme: dark) {
   :root:where(:not([data-theme='light'])) {
     color-scheme: dark;
-    --surface-0: #131312;
+    /* A cool near-black rather than a warm one: the blue-black surface is
-    --surface-1: #1a1a19;
+       what reads as a fitness app, and the series steps were re-validated
-    --surface-2: #232322;
+       against it (all four still clear 3:1 and every CVD gate). */
-    --border: #34342f;
+    --surface-0: #0f1115;
-    --border-strong: #45443e;
+    --surface-1: #181b21;
-    --text-primary: #ffffff;
+    --surface-2: #1f232b;
-    --text-secondary: #c3c2b7;
+    --border: #262a33;
-    --text-muted: #8f8e85;
+    --border-strong: #363b47;
+    --text-primary: #e9ecf1;
+    --text-secondary: #a9b1bd;
+    --text-muted: #78818f;
 
     --series-1: #3987e5;
     --series-2: #d95926;
@@ -73,25 +84,32 @@
     --series-5: #d55181;
     --series-6: #008300;
 
-    --grid: #2c2c28;
+    --grid: #22262e;
     --accent: #3987e5;
     --accent-solid: #1c5cab;
-    --accent-soft: #1d2938;
+    --accent-soft: #17233a;
+
+    --spark-ink: #4a6f9e;
+    --ring-track: #2c3a4d;
 
     --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
+    --shadow-lift: 0 2px 6px rgba(0, 0, 0, 0.5);
   }
 }
 
 :root[data-theme='dark'] {
   color-scheme: dark;
-  --surface-0: #131312;
+  /* A cool near-black rather than a warm one: the blue-black surface is
-  --surface-1: #1a1a19;
+     what reads as a fitness app, and the series steps were re-validated
-  --surface-2: #232322;
+     against it (all four still clear 3:1 and every CVD gate). */
-  --border: #34342f;
+  --surface-0: #0f1115;
-  --border-strong: #45443e;
+  --surface-1: #181b21;
-  --text-primary: #ffffff;
+  --surface-2: #1f232b;
-  --text-secondary: #c3c2b7;
+  --border: #262a33;
-  --text-muted: #8f8e85;
+  --border-strong: #363b47;
+  --text-primary: #e9ecf1;
+  --text-secondary: #a9b1bd;
+  --text-muted: #78818f;
 
   --series-1: #3987e5;
   --series-2: #d95926;
@@ -100,10 +118,14 @@
   --series-5: #d55181;
   --series-6: #008300;
 
-  --grid: #2c2c28;
+  --grid: #22262e;
   --accent: #3987e5;
   --accent-solid: #1c5cab;
-  --accent-soft: #1d2938;
+  --accent-soft: #17233a;
+
+  --spark-ink: #4a6f9e;
+  --ring-track: #2c3a4d;
 
   --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
+  --shadow-lift: 0 2px 6px rgba(0, 0, 0, 0.5);
 }