/* =========================================================
   1. Material Design 3 颜色令牌（CSS 变量）
   浅色：纯白背景 + 靛蓝主色 / 青绿次色 / 玫红强调色
   深色：暖石墨灰（非纯黑）+ 明亮强调色 + 暖白文字
   ========================================================= */
:root {
  color-scheme: light;

  /* 主色 */
  --md-primary: #5b54d6;
  --md-on-primary: #ffffff;
  --md-primary-hover: #4d46c7;
  --md-primary-container: #e6e2ff;
  --md-on-primary-container: #1b1566;
  --md-primary-shadow: rgba(91, 84, 214, 0.28);

  /* 次色 */
  --md-secondary: #0f766e;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #ccefe8;
  --md-on-secondary-container: #06302c;

  /* 强调色 */
  --md-tertiary: #b03e63;
  --md-tertiary-container: #ffd9e3;
  --md-on-tertiary-container: #41001c;

  /* 背景与表面层级 */
  --md-background: #ffffff;
  --md-surface: #ffffff;
  --md-surface-1: #faf8ff;
  --md-surface-2: #f4f1fc;
  --md-surface-3: #ede9f7;

  /* 文字与边框 */
  --md-on-surface: #1b1a22;
  --md-on-surface-variant: #5c5969;
  --md-outline: #c9c4d9;
  --md-outline-variant: #e8e4f2;

  /* 反色（Snackbar） */
  --md-inverse-surface: #302d3a;
  --md-inverse-on-surface: #f6f2fb;

  /* 遮罩与光晕 */
  --md-scrim: rgba(24, 21, 40, 0.32);
  --md-glow-primary: rgba(91, 84, 214, 0.15);
  --md-glow-secondary: rgba(15, 118, 110, 0.11);
  --md-glow-tertiary: rgba(176, 62, 99, 0.1);

  /* 阴影与顶栏 */
  --md-shadow-1: 0 1px 2px rgba(34, 28, 60, 0.06), 0 2px 8px rgba(34, 28, 60, 0.06);
  --md-shadow-2: 0 12px 32px rgba(34, 28, 60, 0.14), 0 2px 8px rgba(34, 28, 60, 0.08);
  --md-appbar: rgba(255, 255, 255, 0.78);

  /* 形状与动效 */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;

  --md-primary: #c6bfff;
  --md-on-primary: #292169;
  --md-primary-hover: #d6d0ff;
  --md-primary-container: #423b8f;
  --md-on-primary-container: #e8e3ff;
  --md-primary-shadow: rgba(0, 0, 0, 0.28);

  --md-secondary: #7fe0d4;
  --md-on-secondary: #003730;
  --md-secondary-container: #1f4f49;
  --md-on-secondary-container: #c7f4ec;

  --md-tertiary: #ffb1c8;
  --md-tertiary-container: #742943;
  --md-on-tertiary-container: #ffd9e3;

  --md-background: #3c3833;
  --md-surface: #3c3833;
  --md-surface-1: #443f39;
  --md-surface-2: #4b463f;
  --md-surface-3: #534d45;

  --md-on-surface: #faf4ea;
  --md-on-surface-variant: #d8cec0;
  --md-outline: #8b8174;
  --md-outline-variant: #5b544b;

  --md-inverse-surface: #f4eee4;
  --md-inverse-on-surface: #322e29;

  --md-scrim: rgba(16, 14, 12, 0.48);
  --md-glow-primary: rgba(198, 191, 255, 0.22);
  --md-glow-secondary: rgba(127, 224, 212, 0.16);
  --md-glow-tertiary: rgba(255, 177, 200, 0.14);

  --md-shadow-1: 0 1px 2px rgba(0, 0, 0, 0.18);
  --md-shadow-2: 0 14px 34px rgba(0, 0, 0, 0.3);
  --md-appbar: rgba(60, 56, 51, 0.8);
}

/* =========================================================
   2. 基础样式
   ========================================================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  font-family: var(--font-sans);
  background-color: var(--md-background);
  color: var(--md-on-surface);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.35s var(--ease-standard), color 0.35s var(--ease-standard);
}

body.is-locked {
  overflow: hidden;
}

h1,
p {
  margin: 0;
}

a {
  color: var(--md-primary);
}

button {
  font: inherit;
  color: inherit;
}

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

::selection {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
}

/* 首次加载时先关闭过渡，避免主题闪动 */
html.preload *,
html.preload *::before,
html.preload *::after {
  transition: none !important;
}

.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;
}

/* Material Icons（通过 CDN 加载的字体） */
.mi {
  font-family: "Material Icons Round", "Material Icons", sans-serif;
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: "liga";
  font-feature-settings: "liga";
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* 跳转链接 */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--md-primary);
  color: var(--md-on-primary);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease-standard);
}

.skip-link:focus {
  transform: none;
}

/* =========================================================
   3. 背景光晕
   ========================================================= */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.ambient__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
}

.ambient__blob--primary {
  width: 46vmax;
  height: 46vmax;
  top: -18vmax;
  left: -12vmax;
  background: var(--md-glow-primary);
}

.ambient__blob--secondary {
  width: 38vmax;
  height: 38vmax;
  top: 2vmax;
  right: -14vmax;
  background: var(--md-glow-secondary);
}

.ambient__blob--tertiary {
  width: 44vmax;
  height: 44vmax;
  right: 8vmax;
  bottom: -24vmax;
  background: var(--md-glow-tertiary);
}

/* =========================================================
   4. 顶部应用栏
   ========================================================= */
.app-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 10px;
  height: calc(64px + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) max(10px, env(safe-area-inset-right)) 0
    max(10px, env(safe-area-inset-left));
  background-color: var(--md-appbar);
  -webkit-backdrop-filter: blur(16px) saturate(1.35);
  backdrop-filter: blur(16px) saturate(1.35);
  transition: background-color 0.35s var(--ease-standard);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.brand__mark {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border-radius: 50%;
  background: conic-gradient(
    from 210deg,
    var(--md-primary),
    var(--md-secondary),
    var(--md-tertiary),
    var(--md-primary)
  );
  box-shadow: 0 0 0 3px var(--md-surface-1);
}

.brand__text {
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--md-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color 0.2s var(--ease-standard), color 0.2s var(--ease-standard),
    transform 0.18s var(--ease-standard);
}

.icon-btn:hover {
  background-color: var(--md-surface-2);
  color: var(--md-on-surface);
}

.icon-btn:active {
  transform: scale(0.94);
}

/* 主题按钮与图标切换 */
.theme {
  position: relative;
  margin-left: auto;
  display: flex;
  align-items: center;
}

.icon-swap {
  position: relative;
  display: block;
  width: 24px;
  height: 24px;
}

.icon-swap .mi {
  position: absolute;
  inset: 0;
  font-size: 24px;
  transition: opacity 0.3s var(--ease-standard), transform 0.4s var(--ease-emphasized);
}

.icon-swap__moon {
  opacity: 1;
  transform: none;
}

.icon-swap__sun {
  opacity: 0;
  transform: rotate(-70deg) scale(0.5);
}

html[data-theme="light"] .icon-swap__moon {
  opacity: 1;
  transform: none;
}

html[data-theme="light"] .icon-swap__sun {
  opacity: 0;
  transform: rotate(-70deg) scale(0.5);
}

html[data-theme="dark"] .icon-swap__moon {
  opacity: 0;
  transform: rotate(70deg) scale(0.5);
}

html[data-theme="dark"] .icon-swap__sun {
  opacity: 1;
  transform: none;
}

/* 轻量 tooltip */
.tooltip {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 55;
  max-width: calc(100vw - 24px);
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  font-size: 0.72rem;
  line-height: 1.4;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.18s var(--ease-standard), transform 0.22s var(--ease-standard),
    visibility 0.18s;
  pointer-events: none;
}

.theme__btn:hover + .tooltip,
.theme__btn:focus-visible + .tooltip {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.theme.is-open .tooltip {
  opacity: 0;
  visibility: hidden;
}

/* 主题下拉菜单 */
.theme-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 60;
  width: 218px;
  padding: 6px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
  background: var(--md-surface-1);
  box-shadow: var(--md-shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transform-origin: top right;
  transition: opacity 0.16s var(--ease-standard), transform 0.24s var(--ease-emphasized),
    visibility 0s linear 0.24s;
}

.theme-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.16s var(--ease-standard), transform 0.24s var(--ease-emphasized),
    visibility 0s;
}

.theme-menu__label {
  padding: 8px 10px 5px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--md-on-surface-variant);
}

.theme-menu__item {
  width: 100%;
  min-height: 46px;
  display: grid;
  grid-template-columns: 22px 1fr 20px;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--md-on-surface);
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color 0.18s var(--ease-standard), color 0.18s var(--ease-standard);
}

.theme-menu__item:hover {
  background: var(--md-surface-2);
}

.theme-menu__item .mi {
  font-size: 20px;
  color: var(--md-on-surface-variant);
}

.theme-menu__check {
  opacity: 0;
  transition: opacity 0.15s var(--ease-standard);
}

.theme-menu__item[aria-checked="true"] {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-weight: 600;
}

.theme-menu__item[aria-checked="true"] .mi {
  color: var(--md-on-primary-container);
}

.theme-menu__item[aria-checked="true"] .theme-menu__check {
  opacity: 1;
}

.theme-menu__item:focus-visible,
.btn:focus-visible,
.icon-btn:focus-visible {
  outline-offset: -3px;
}

/* =========================================================
   5. 遮罩与抽屉
   ========================================================= */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: var(--md-scrim);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-standard), visibility 0.3s;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.scrim.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* 抽屉：规格参考 mdui Navigation Drawer（模态遮罩、56px 菜单项、右缘圆角） */
.drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 60;
  width: min(340px, 86vw);
  display: flex;
  flex-direction: column;
  padding: calc(18px + env(safe-area-inset-top)) 14px
    calc(18px + env(safe-area-inset-bottom));
  border-radius: 0 24px 24px 0;
  background: var(--md-surface-1);
  color: var(--md-on-surface);
  box-shadow: var(--md-shadow-2);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(calc(-100% - 24px));
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.34s var(--ease-emphasized), visibility 0s linear 0.34s,
    background-color 0.35s var(--ease-standard);
}

.drawer.is-open {
  transform: none;
  visibility: visible;
  pointer-events: auto;
  transition: transform 0.34s var(--ease-emphasized), visibility 0s,
    background-color 0.35s var(--ease-standard);
}

.drawer__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 8px 18px;
}

.drawer__avatar {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.drawer__avatar .mi {
  font-size: 22px;
}

.drawer__headtext {
  min-width: 0;
}

.drawer__hello {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--md-on-surface-variant);
}

.drawer__title {
  margin-top: 3px;
  font-size: 1.04rem;
  font-weight: 600;
  color: var(--md-on-surface);
}

.drawer__divider {
  height: 1px;
  margin: 0 8px 14px;
  background: var(--md-outline-variant);
}

.drawer__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drawer__item {
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 58px;
  padding: 0 16px 0 11px;
  border-radius: 18px;
  color: var(--md-on-surface-variant);
  font-size: 0.94rem;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: background-color 0.2s var(--ease-standard), color 0.2s var(--ease-standard);
}

.drawer__item:hover {
  background: var(--md-surface-2);
  color: var(--md-on-surface);
}

.drawer__item:focus-visible {
  outline-offset: -2px;
}

.drawer__icon {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--md-surface-2);
  color: var(--md-secondary);
  transition: background-color 0.2s var(--ease-standard), color 0.2s var(--ease-standard);
}

.drawer__icon .mi {
  font-size: 21px;
}

.drawer__item--drive .drawer__icon {
  color: var(--md-tertiary);
}

.drawer__label {
  min-width: 0;
  overflow-wrap: anywhere;
}

.drawer__badge {
  margin-left: auto;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: var(--md-surface);
  color: var(--md-secondary);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.drawer__item:not(.is-active) .drawer__badge {
  display: none;
}

.drawer__external {
  margin-left: auto;
  font-size: 18px;
  color: var(--md-tertiary);
  opacity: 0.8;
}

.drawer__item.is-active {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  font-weight: 600;
}

.drawer__item.is-active .drawer__icon {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
}

.drawer__foot {
  margin-top: auto;
  padding: 26px 10px 2px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--md-on-surface-variant);
}

.palette {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.palette i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--md-primary);
}

.palette i:nth-child(2) {
  background: var(--md-secondary);
}

.palette i:nth-child(3) {
  background: var(--md-tertiary);
}

/* =========================================================
   6. 主内容
   ========================================================= */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: calc(88px + env(safe-area-inset-top)) max(20px, env(safe-area-inset-right))
    calc(104px + env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
}

.hero__inner {
  width: 100%;
  max-width: 760px;
  text-align: center;
  animation: hero-in 0.7s var(--ease-emphasized) both;
}

@keyframes hero-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.hero__dot {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--md-secondary);
  box-shadow: 0 0 0 3px var(--md-secondary-container);
}

.hero__title {
  font-size: clamp(1.95rem, 8vw, 4rem);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0.02em;
  color: var(--md-on-surface);
  overflow-wrap: break-word;
  text-wrap: balance;
}

.hero__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 5px;
  margin: 22px auto 0;
  border-radius: var(--radius-full);
  background: linear-gradient(
    90deg,
    var(--md-primary) 0%,
    var(--md-secondary) 55%,
    var(--md-tertiary) 100%
  );
}

.hero__subtitle {
  max-width: 26rem;
  margin: 18px auto 0;
  font-size: clamp(0.94rem, 2.4vw, 1.05rem);
  line-height: 1.9;
  color: var(--md-on-surface-variant);
  text-wrap: balance;
}

.hero__actions {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero__hint {
  font-size: 0.74rem;
  color: var(--md-on-surface-variant);
  opacity: 0.9;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 25px;
  border: 0;
  border-radius: var(--radius-md);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.22s var(--ease-standard), color 0.22s var(--ease-standard),
    transform 0.18s var(--ease-standard), box-shadow 0.22s var(--ease-standard);
}

.btn .mi {
  font-size: 20px;
}

.btn--filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: 0 8px 20px var(--md-primary-shadow);
}

.btn--filled:focus-visible {
  outline-color: var(--md-on-primary);
}

.btn--filled:hover {
  background: var(--md-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 12px 26px var(--md-primary-shadow);
}

.btn--filled:active {
  transform: translateY(0) scale(0.985);
}

/* =========================================================
   7. 右下角日期
   ========================================================= */
.page-foot {
  position: fixed;
  right: calc(16px + env(safe-area-inset-right));
  bottom: calc(16px + env(safe-area-inset-bottom));
  z-index: 20;
}

.date-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  max-width: calc(100vw - 32px);
  padding: 9px 15px;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-full);
  background: var(--md-surface-1);
  color: var(--md-on-surface-variant);
  font-size: 0.79rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  box-shadow: var(--md-shadow-1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  white-space: nowrap;
  transition: background-color 0.35s var(--ease-standard), color 0.35s var(--ease-standard),
    border-color 0.35s var(--ease-standard);
}

.date-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--md-tertiary);
  box-shadow: 0 0 0 3px var(--md-tertiary-container);
}

/* =========================================================
   8. Snackbar 与波纹反馈
   ========================================================= */
.snackbar {
  position: fixed;
  left: 50%;
  bottom: calc(78px + env(safe-area-inset-bottom));
  z-index: 90;
  width: max-content;
  max-width: min(460px, calc(100vw - 32px));
  padding: 13px 18px;
  border-radius: 14px;
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  font-size: 0.83rem;
  line-height: 1.55;
  text-align: left;
  box-shadow: var(--md-shadow-2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 16px);
  transition: opacity 0.22s var(--ease-standard), transform 0.28s var(--ease-emphasized),
    visibility 0.28s;
}

.snackbar.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.18;
  transform: scale(0);
  animation: ripple-out 0.55s var(--ease-emphasized) forwards;
  pointer-events: none;
}

@keyframes ripple-out {
  to {
    transform: scale(1);
    opacity: 0;
  }
}

/* =========================================================
   9. 响应式
   ========================================================= */
@media (min-width: 600px) {
  .app-bar {
    padding-left: max(20px, env(safe-area-inset-left));
    padding-right: max(20px, env(safe-area-inset-right));
  }

  .brand__text {
    font-size: 1rem;
  }

  .hero {
    padding-left: max(40px, env(safe-area-inset-left));
    padding-right: max(40px, env(safe-area-inset-right));
  }

  .hero__eyebrow {
    margin-bottom: 26px;
  }

  .hero__title::after {
    margin-top: 26px;
  }

  .hero__actions {
    margin-top: 34px;
  }

  .drawer {
    width: min(360px, 88vw);
    padding-left: 18px;
    padding-right: 18px;
  }

  .date-chip {
    padding: 10px 16px;
    font-size: 0.83rem;
  }
}

@media (min-width: 840px) {
  .snackbar {
    bottom: calc(30px + env(safe-area-inset-bottom));
  }
}

@media (min-width: 1024px) {
  .hero__inner {
    max-width: 820px;
  }

  .page-foot {
    right: calc(28px + env(safe-area-inset-right));
    bottom: calc(24px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 359px) {
  .hero__eyebrow {
    letter-spacing: 0.12em;
  }

  .hero__title {
    letter-spacing: 0;
  }
}

@media (max-width: 420px) {
  .hero__hint {
    display: none;
  }
}

/* 横屏手机等矮屏，避免内容被裁切 */
@media (max-height: 560px) {
  .hero {
    padding-top: calc(78px + env(safe-area-inset-top));
    padding-bottom: calc(84px + env(safe-area-inset-bottom));
  }

  .hero__eyebrow {
    margin-bottom: 14px;
  }

  .hero__title::after {
    margin-top: 14px;
  }

  .hero__actions {
    margin-top: 20px;
  }
}

/* 横屏手机：压缩留白，保证标题、按钮、日期同屏且不拥挤 */
@media (max-height: 560px) and (orientation: landscape) {
  .hero {
    padding-top: calc(68px + env(safe-area-inset-top));
    padding-bottom: calc(62px + env(safe-area-inset-bottom));
  }

  .hero__eyebrow,
  .hero__hint {
    display: none;
  }

  .hero__title::after {
    margin-top: 14px;
  }

  .hero__actions {
    margin-top: 18px;
  }
}

@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;
  }
}