/* ============================================================
   CalorieAI 官网样式
   视觉基线：Android 端 CalorieAITheme（Material 3 · 蓝色品牌）
   · 颜色 / 圆角 / 字重均映射自 app/src/main/java/.../ui/theme/
     Color.kt · Theme.kt · GlassUtils.kt · BottomNavBar.kt
   · 浅色为默认（App 首装默认浅色）；深色跟随系统
     prefers-color-scheme，取 DarkColorScheme / GlassDarkColors
   · 卡片无模糊（App glassBlur 已全局关闭）；
     仅底部导航保留 haze 24dp 毛玻璃（与 BottomNavBar 一致）
   · 动画在 prefers-reduced-motion: reduce 下全部关闭
   ============================================================ */

/* ---------- 设计 token（Android → Web 映射） ---------- */

:root {
  /* Material 3 · LightColorScheme（Color.kt / Theme.kt / AppColors.kt） */
  --md-primary: #2196F3;               /* PrimaryLight */
  --md-on-primary: #FFFFFF;            /* OnPrimaryLight */
  --md-primary-container: #BBDEFB;     /* PrimaryContainerLight */
  --md-on-primary-container: #1565C0;  /* OnPrimaryContainerLight */
  --md-secondary: #03A9F4;             /* SecondaryLight */
  --md-on-secondary: #FFFFFF;
  --md-secondary-container: #B3E5FC;   /* SecondaryContainerLight */
  --md-on-secondary-container: #0288D1;/* OnSecondaryContainerLight */
  --md-tertiary: #00BCD4;              /* TertiaryLight */
  --md-on-tertiary: #FFFFFF;
  --md-tertiary-container: #B2EBF2;
  --md-on-tertiary-container: #0097A7;
  --md-water: #26C6DA;                 /* 饮水强调（OverviewScreen/WaterTracker） */
  --md-outline: #79747E;               /* OutlineLight */
  --md-outline-variant: #CAC4D0;       /* OutlineVariantLight */
  --md-surface-lowest: #FFFFFF;        /* SurfaceContainerLowestLight */
  --md-surface-low: #F8F8F8;           /* SurfaceContainerLowLight */
  --md-surface: #F0F0F0;               /* SurfaceContainerLight */
  --md-surface-high: #E8E8E8;          /* SurfaceContainerHighLight */
  --md-surface-highest: #E0E0E0;       /* SurfaceContainerHighestLight */
  --md-on-surface: #1C1B1F;            /* OnSurfaceLight */
  --md-on-surface-variant: #49454F;    /* OnSurfaceVariantLight */
  --md-card: #FFFFFF;                  /* BackgroundLight */
  --md-card-border: rgba(28, 27, 31, 0.08); /* 白卡在白底上的可感分层 */
  --md-green: #4CAF50;                 /* SuccessGreen */
  --md-chart-green: #82ABA3;           /* ChartGreen */
  --md-error: #B3261E;                 /* ErrorLight */
  --md-error-container: #F9DEDC;       /* ErrorContainerLight */
  --md-on-error-container: #410E0B;

  /* 站点语义 token */
  --bg: #FFFFFF;                       /* BackgroundLight */
  --bg-soft: #F7F9FB;                  /* 区块底（surfaceContainerLow 蓝调） */
  --panel: #FFFFFF;
  --panel-2: #FFFFFF;
  --ink: #1C1B1F;                      /* OnBackgroundLight */
  --ink-dim: #49454F;                  /* OnSurfaceVariantLight */
  --ink-faint: #7A7D85;
  --line: #E8EAED;
  --line-strong: #D9DDE2;
  --brand: #2196F3;
  --brand-deep: #1976D2;
  --brand-soft: rgba(33, 150, 243, 0.10);
  --green: #4CAF50;
  --cyan: #26C6DA;
  --orange: #FF9800;
  --red: #F44336;
  --hover: rgba(28, 27, 31, 0.045);
  --hover-strong: rgba(28, 27, 31, 0.08);
  --header-bg: rgba(255, 255, 255, 0.86);
  --snackbar-bg: #313033;              /* InverseSurfaceLight */
  --snackbar-ink: #F4EFF4;

  /* 形状（Material 3 规范与 Compose 源码映射） */
  --radius-xs: 4px;                    /* shapes.extraSmall */
  --radius-sm: 8px;                    /* shapes.small */
  --radius-md: 12px;                   /* shapes.medium */
  --radius-lg: 16px;                   /* shapes.large（记录卡、日历卡、菜谱卡 16dp） */
  --radius-section: 20px;              /* 概览/我的大卡 20dp */
  --radius-xl: 28px;                   /* shapes.extraLarge（今日概览卡、对话框 28dp） */
  --radius: 16px;                      /* 默认卡片 16dp */
  --btn-radius: 20px;                  /* M3 按钮 */

  --maxw: 1080px;
  /* App 使用 M3 默认 Roboto；网页使用同族无衬线 */
  --sans: "Roboto", -apple-system, BlinkMacSystemFont, "PingFang SC",
          "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Segoe UI",
          system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code",
          Consolas, monospace;

  --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.05), 0 2px 8px rgba(16, 24, 40, 0.04);
  --shadow-float: 0 16px 40px rgba(16, 24, 40, 0.14);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Material 3 · DarkColorScheme */
    --md-primary: #90CAF9;               /* PrimaryDark */
    --md-on-primary: #0D47A1;            /* OnPrimaryDark */
    --md-primary-container: #1565C0;     /* PrimaryContainerDark */
    --md-on-primary-container: #BBDEFB;  /* OnPrimaryContainerDark */
    --md-secondary: #81D4FA;             /* SecondaryDark */
    --md-on-secondary: #01579B;
    --md-secondary-container: #0288D1;   /* SecondaryContainerDark */
    --md-on-secondary-container: #B3E5FC;
    --md-tertiary: #80DEEA;              /* TertiaryDark */
    --md-on-tertiary: #006064;
    --md-tertiary-container: #0097A7;
    --md-on-tertiary-container: #B2EBF2;
    --md-water: #4DD0E1;
    --md-outline: #938F99;
    --md-outline-variant: #49454F;       /* OutlineVariantDark */
    --md-surface-lowest: #000000;        /* SurfaceContainerLowestDark */
    --md-surface-low: #0A0A0A;           /* SurfaceContainerLowDark */
    --md-surface: #101010;               /* SurfaceContainerDark */
    --md-surface-high: #161616;          /* SurfaceContainerHighDark */
    --md-surface-highest: #1E1E1E;       /* SurfaceContainerHighestDark */
    --md-on-surface: #E0E0E0;            /* OnSurfaceDark */
    --md-on-surface-variant: #CAC4D0;    /* OnSurfaceVariantDark */
    --md-card: #0D0D0D;                  /* GlassDarkColors.CardBackground */
    --md-card-border: rgba(255, 255, 255, 0.12); /* dark 边框 */
    --md-error: #F2B8B5;
    --md-error-container: #8C1D18;
    --md-on-error-container: #F9DEDC;

    --bg: #000000;                       /* BackgroundDark */
    --bg-soft: #0A0A0A;                  /* SurfaceContainerLowDark */
    --panel: #0D0D0D;
    --panel-2: #141414;                  /* SurfaceVariantDark */
    --ink: #E0E0E0;                      /* OnBackgroundDark */
    --ink-dim: #CAC4D0;                  /* OnSurfaceVariantDark */
    --ink-faint: #8B8D93;
    --line: #202124;
    --line-strong: #33363B;
    --brand: #90CAF9;
    --brand-deep: #64B5F6;
    --brand-soft: rgba(144, 202, 249, 0.14);
    --green: #81C995;
    --cyan: #4DD0E1;
    --orange: #FFB74D;
    --red: #F44336;
    --hover: rgba(255, 255, 255, 0.06);
    --hover-strong: rgba(255, 255, 255, 0.10);
    --header-bg: rgba(0, 0, 0, 0.86);
    --snackbar-bg: #E6E1E5;              /* InverseSurfaceDark */
    --snackbar-ink: #313033;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-float: 0 16px 40px rgba(0, 0, 0, 0.6);
  }
}

/* ---------- 基础 ---------- */

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s, color 0.25s;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4, h5 {
  font-family: var(--sans);
  font-weight: 700;              /* App 页面标题 headlineMedium + Bold */
  line-height: 1.3;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

p {
  overflow-wrap: break-word;
}

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

/* ---------- 导航栏 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  isolation: isolate;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
  height: 60px;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 20px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2px;
  flex-shrink: 0;
}
.brand:hover { text-decoration: none; }
.brand svg { width: 28px; height: 28px; border-radius: 8px; box-shadow: 0 1px 3px rgba(16,24,40,0.12); flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 7px 13px;
  border-radius: 999px;            /* App 底导航胶囊选中态语言 */
  color: var(--ink-dim);
  font-size: 14.5px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); background: var(--hover); text-decoration: none; }
/* 选中态 = App 底部导航：primaryContainer 底 + onPrimaryContainer 字 */
.nav-links a.active {
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
  font-weight: 600;
}

.nav-cta {
  margin-left: 10px;
  padding: 8px 18px !important;
  background: var(--brand);
  color: var(--md-on-primary) !important;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--brand-deep) !important; }
.nav-cta.active { background: var(--brand-deep) !important; color: #fff !important; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-toggle svg { width: 20px; height: 20px; }

/* 移动端菜单 */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--bg);
  padding: 10px clamp(16px, 3vw, 24px) max(18px, env(safe-area-inset-bottom, 18px));
  max-height: calc(100dvh - 60px - env(safe-area-inset-top, 0px));
  max-height: calc(100svh - 60px - env(safe-area-inset-top, 0px));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 16px;
}
.mobile-menu a.active { color: var(--brand); font-weight: 600; }
.mobile-menu .mobile-cta {
  margin-top: 14px;
  display: block;
  text-align: center;
  background: var(--brand);
  color: var(--md-on-primary);
  border-radius: 999px;
  padding: 12px;
  font-weight: 600;
  border-bottom: none;
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

/* ---------- 版式骨架 ---------- */

.view { display: none; }
.view.active { display: block; animation: viewIn 0.35s ease; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
  padding-left: max(clamp(16px, 3vw, 24px), env(safe-area-inset-left, 0px));
  padding-right: max(clamp(16px, 3vw, 24px), env(safe-area-inset-right, 0px));
}

.section {
  padding: clamp(48px, 7vw, 72px) 0 clamp(16px, 3vw, 24px);
  content-visibility: auto;
  contain-intrinsic-size: auto 720px;
}

.section-head { margin-bottom: clamp(24px, 4vw, 36px); }

/* 小节标签：中文短词，App 语言（去 Stitch 英文工作台标签） */
.kicker {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.kicker::before {
  content: "";
  width: 18px;
  height: 4px;
  border-radius: 999px;
  background: var(--brand);
  opacity: 0.85;
}

.section-head h2 { font-size: clamp(24px, 4vw, 30px); }
.section-head .lede { color: var(--ink-dim); margin-top: 12px; max-width: 640px; font-size: clamp(14.5px, 2.2vw, 16.5px); }

.rule { border: none; border-top: 1px solid var(--line); margin: 28px 0; }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1100px 460px at 78% -12%, rgba(33, 150, 243, 0.10), transparent 60%),
    radial-gradient(700px 360px at 6% 112%, rgba(38, 198, 218, 0.07), transparent 60%),
    var(--bg);
}
@media (prefers-color-scheme: dark) {
  .hero {
    background:
      radial-gradient(1100px 460px at 78% -12%, rgba(144, 202, 249, 0.10), transparent 60%),
      radial-gradient(700px 360px at 6% 112%, rgba(77, 208, 225, 0.06), transparent 60%),
      var(--bg);
  }
}

/* 首屏背景字符场：鼠标经过时只在指针附近提亮，避免整页持续漂浮。 */
.hero-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.32;
  color: var(--hero-field-ink, rgba(33, 150, 243, 0.42));
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 18%, #000 78%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 18%, #000 78%, transparent 100%);
}
.hero-field pre {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.05;
  letter-spacing: 0.04em;
  white-space: pre;
  user-select: none;
  transform: translate3d(0, 0, 0);
}
#vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(260px 220px at var(--hero-x, 50%) var(--hero-y, 36%), rgba(33, 150, 243, 0.11), transparent 72%),
    linear-gradient(90deg, var(--bg) 0%, transparent 20%, transparent 80%, var(--bg) 100%);
}
.hero-inner { position: relative; z-index: 2; }
@media (prefers-color-scheme: dark) {
  .hero-field { --hero-field-ink: rgba(144, 202, 249, 0.48); opacity: 0.4; }
  #vignette {
    background:
      radial-gradient(260px 220px at var(--hero-x, 50%) var(--hero-y, 36%), rgba(144, 202, 249, 0.15), transparent 72%),
      linear-gradient(90deg, var(--bg) 0%, transparent 20%, transparent 80%, var(--bg) 100%);
  }
}

.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 24px 88px;
  display: block;
}
.hero-copy {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.hero-copy .hero-sub { margin-left: auto; margin-right: auto; }
.hero-copy .hero-actions,
.hero-copy .hero-version { justify-content: center; }
.hero-preview {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 76px auto 0;
  padding-bottom: 96px;
}
.hero-demo-copy {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 22px;
  align-items: end;
  max-width: 780px;
  margin: 0 auto 22px;
}
.hero-demo-count {
  display: flex;
  align-items: baseline;
  gap: 4px;
  color: var(--ink-faint);
  font-family: var(--mono);
  white-space: nowrap;
}
.hero-demo-count strong { color: var(--brand); font-size: 42px; line-height: 1; }
.hero-demo-count span { font-size: 12px; }
.hero-demo-kicker {
  color: var(--brand);
  font: 600 12px/1.4 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-demo-copy h2 { margin-top: 5px; font-size: clamp(24px, 3vw, 34px); }
.hero-demo-copy p:last-child { color: var(--ink-dim); font-size: 14px; margin-top: 8px; max-width: 600px; }
.phone-demo-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  overflow: hidden;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  box-shadow: var(--shadow-card);
}
.phone-demo-pick {
  min-height: 70px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 12px 18px;
  color: var(--ink-dim);
  background: transparent;
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}
.phone-demo-pick:last-child { border-right: 0; }
.phone-demo-pick:hover { background: var(--hover); color: var(--ink); }
.phone-demo-pick:focus-visible { outline: 2px solid var(--brand); outline-offset: -2px; }
.phone-demo-pick.on {
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
}
.phone-demo-pick-no {
  color: var(--brand);
  font: 11px var(--mono);
  opacity: 0.8;
}
.phone-demo-pick b { display: block; font-size: 14px; font-weight: 700; }
.phone-demo-pick small { display: block; color: var(--ink-faint); font-size: 11px; margin-top: 2px; }
.phone-demo-pick.on small { color: var(--md-on-primary-container); opacity: 0.75; }
.phone-demo-stage {
  position: relative;
  min-height: 760px;
  margin-top: 30px;
  padding: 58px 40px 70px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  overflow: hidden;
  contain: paint;
  border: 1px solid color-mix(in srgb, var(--brand) 20%, transparent);
  border-radius: 16px;
  background:
    radial-gradient(360px 300px at 50% 44%, rgba(33, 150, 243, 0.11), transparent 70%),
    linear-gradient(145deg, color-mix(in srgb, var(--panel) 96%, #08111b), var(--bg));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03), 0 18px 50px rgba(16, 24, 40, 0.12);
}
.phone-demo-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image: linear-gradient(rgba(33, 150, 243, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(33, 150, 243, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at center, #000 12%, transparent 74%);
}
.phone-demo-stage-label {
  position: absolute;
  top: 18px;
  left: 22px;
  color: var(--brand);
  font: 10px/1 var(--mono);
  letter-spacing: 0.14em;
  opacity: 0.7;
}
.hero-preview .hero-phone { grid-column: 2 / 3; display: flex; justify-content: center; z-index: 2; margin-top: 0; }
.hero-preview .phone {
  width: 360px;
  padding: 12px;
  border-radius: 42px;
}
.hero-preview .phone .screen {
  min-height: 0;
  aspect-ratio: 9 / 20;
  padding: 18px 16px 14px;
  border-radius: 31px;
  font-size: 13px;
  contain: strict;
}
.hero-preview .phone .notch { width: 100px; height: 22px; margin-bottom: 14px; }
.hero-preview .phone .app-title { font-size: 20px; padding: 3px 5px 14px; }
.hero-preview .phone .app-title span:last-child { font-size: 13px; }
.hero-preview .phone .app-title span:last-child:empty { display: none; }
.hero-preview .p-card { padding: 13px 15px; margin-bottom: 12px; }
.hero-preview .phone-demo-home-view > .p-card { background: var(--md-surface); border-color: transparent; border-radius: 28px; }
.hero-preview .p-card .p-label { font-size: 12px; margin-bottom: 8px; }
.hero-preview .p-num b { font-size: 20px; }
.hero-preview .p-num span { font-size: 11px; }
.hero-preview .p-row { padding: 11px 5px; }
.hero-preview .p-row .p-food small { font-size: 11px; }
.hero-preview .p-row .p-kcal { font-size: 12px; }
.hero-preview .p-fab { right: 16px; bottom: 58px; width: 50px; height: 50px; font-size: 25px; }
.hero-preview .p-fab-stats { bottom: 121px; width: 38px; height: 38px; right: 22px; font-size: 16px; }
.hero-preview .p-nav { padding: 8px 8px 10px; }
.hero-preview .p-nav button { padding: 6px 0; font-size: 11px; }
  .hero-preview .phone-demo-panel { inset: 66px 0 59px; padding: 6px 16px 18px; }
.hero-preview .phone-demo-sheet { left: 14px; right: 14px; bottom: 59px; }
.hero-preview .phone-demo-feedback { left: 16px; right: 16px; bottom: 64px; font-size: 11px; }
.hero-preview .phone-demo-list-row b,
.hero-preview .phone-demo-setting b { font-size: 12px; }
.hero-preview .phone-demo-list-row small,
.hero-preview .phone-demo-setting small { font-size: 10px; }
.phone-demo-hotspot {
  position: relative;
  grid-column: 3 / 4;
  justify-self: start;
  margin-left: 24px;
  transform: translateY(-40px);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border: 0;
  padding: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
  cursor: pointer;
}
.phone-demo-hotspot span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 3px solid #fff;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  box-shadow: 0 0 0 1px var(--brand), 0 6px 16px rgba(33, 150, 243, 0.25);
  font: 700 14px/1 var(--mono);
  will-change: transform;
  backface-visibility: hidden;
}
.phone-demo-hotspot em {
  padding: 4px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-dim);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  font-size: 11px;
  font-style: normal;
  white-space: nowrap;
}
.phone-demo-hotspot:hover span { transform: scale(1.08); }
.phone-demo-hotspot:focus-visible { outline: 2px solid var(--brand); outline-offset: 5px; border-radius: 999px; }
.phone-demo-linkage {
  position: absolute;
  right: auto;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-faint);
  font-size: 12px;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  padding: 6px 16px;
  border-radius: 999px;
}
.phone-demo-linkage b { color: var(--ink-dim); font-weight: 600; }
.phone-demo-linkage i { width: 20px; height: 1px; background: var(--brand); opacity: 0.8; }
.phone-demo-linkage i::after { content: "›"; display: block; margin: -9px 0 0 13px; color: var(--brand); font-size: 14px; }

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--ink-dim);
  background: var(--panel);
  margin-bottom: 26px;
}
.hero-tag .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(76, 175, 80, 0.7);
}

.hero h1 {
  font-size: clamp(36px, 6vw, 54px);
  line-height: 1.2;
  font-weight: 700;
}
.hero h1 em {
  font-style: normal;
  color: var(--brand);
}

.hero .hero-sub {
  margin-top: 20px;
  font-size: 18px;
  color: var(--ink-dim);
  max-width: 560px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero-version {
  margin-top: 22px;
  font-size: 14px;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: center;
}
.hero-version strong { color: var(--ink-dim); font-weight: 600; }

/* 按钮（M3 filled / outlined） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--btn-radius);
  padding: 12px 26px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  background: var(--panel);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  font-family: var(--sans);
  line-height: 1.4;
}
.btn:hover { background: var(--hover); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--md-on-primary);
}
.btn-primary:hover { background: var(--brand-deep); border-color: var(--brand-deep); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn .btn-note { font-weight: 400; opacity: 0.85; font-size: 13.5px; }

/* Hero 下方手机预览 */
.hero-phone { display: flex; justify-content: center; }

/* ---------- 手机模型（结构化产品预览，非截图）
   按 App 浅色界面绘制：白屏、surfaceContainerLow 卡片、
   底部导航毛玻璃 + primaryContainer 胶囊指示器、
   FAB secondaryContainer ---------- */

.phone {
  width: 264px;
  border: 1px solid var(--line-strong);
  border-radius: 34px;
  background: var(--md-surface);
  padding: 10px;
  box-shadow: var(--shadow-float);
}
.phone .screen {
  border-radius: 25px;
  background: var(--bg);           /* App BackgroundLight #FFFFFF */
  border: 1px solid var(--line);
  overflow: hidden;
  min-height: 460px;
  padding: 14px 12px 12px;
  font-size: 11px;
  position: relative;
  color: var(--ink);
}
.phone .notch {
  width: 76px; height: 18px;
  background: var(--md-surface);
  border-radius: 999px;
  margin: 0 auto 10px;
}
.phone .app-title {
  font-size: 15px;                 /* headlineMedium Bold 的缩小版 */
  font-weight: 700;
  padding: 2px 4px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
}
.phone .app-title span:last-child { font-size: 10px; font-weight: 400; color: var(--ink-faint); }

/* App 卡片：surfaceContainerLow、圆角 18dp、无模糊无边框 */
.p-card {
  background: var(--md-surface-low);
  border: 1px solid var(--md-card-border);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 10px;
}
.p-card .p-label { color: var(--ink-faint); font-size: 10px; margin-bottom: 6px; }
.p-card .p-title { font-size: 12px; font-weight: 600; color: var(--ink); }
.p-card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.p-card-head .p-label { margin-bottom: 0; }
.p-chevron { color: var(--ink-faint); font-size: 15px; line-height: 1; }
.p-calendar { display: flex; align-items: center; justify-content: space-between; }
.p-calendar-date { display: flex; align-items: baseline; gap: 6px; }
.p-calendar-date b { font-size: 11px; font-weight: 500; color: var(--ink); }
.p-calendar-date strong { font-size: 13px; color: var(--ink); }
.p-calendar-date span { color: var(--ink-faint); font-size: 10px; }

.p-nums { display: flex; gap: 8px; }
.p-num { flex: 1; }
.p-num b { display: block; font-size: 15px; color: var(--ink); font-weight: 700; }
.p-num b.accent { color: var(--brand); }
.p-num span { font-size: 9.5px; color: var(--ink-faint); }
.p-calorie-box {
  border-radius: 12px;
  padding: 7px 5px 6px;
  background: color-mix(in srgb, var(--md-surface-low) 86%, transparent);
}
.p-calorie-box:first-child,
.p-calorie-box:last-child { background: color-mix(in srgb, var(--md-primary-container) 56%, transparent); }
.hero-preview .p-calorie-box { background: var(--bg); }
.hero-preview .p-calorie-box:first-child,
.hero-preview .p-calorie-box:last-child { background: var(--md-primary-container); }
.p-encouragement {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  color: var(--ink-faint);
  font-size: 10px;
  line-height: 1.3;
  margin-top: 8px;
}
.p-water-card { position: relative; padding-bottom: 13px; }
.p-water-card .p-nums { padding-right: 48px; }
.p-water-box { background: color-mix(in srgb, var(--cyan) 10%, var(--md-surface-low)); border-radius: 12px; padding: 7px 5px 6px; }
.p-water-box b { color: var(--ink); }
.p-water-add {
  position: absolute;
  right: 14px;
  bottom: 13px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: var(--cyan);
  box-shadow: 0 5px 12px rgba(38, 198, 218, 0.3);
  font: 700 21px/1 var(--sans);
  cursor: pointer;
}
.p-water-add:hover { transform: translateY(-1px); }

.p-empty-state {
  min-height: 176px;
  padding: 20px 12px 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink-faint);
}
.p-empty-state-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 10px;
  fill: currentColor;
  opacity: 0.62;
}
.p-empty-state b { color: var(--ink-dim); font-size: 14px; }
.p-empty-state span { margin-top: 5px; color: var(--ink-faint); font-size: 10.5px; }

/* App LinearProgressIndicator：primary 单色 */
.p-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--md-surface-high);
  margin: 8px 0 4px;
  overflow: hidden;
}
.p-bar i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--brand);
}

.p-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
  border-bottom: 1px solid var(--line);
}
.p-row:last-child { border-bottom: none; }
.p-row .p-food { color: var(--ink); font-weight: 500; }
.p-row .p-food small { display: block; color: var(--ink-faint); font-size: 9.5px; font-weight: 400; }
.p-row .p-kcal { color: var(--brand); font-weight: 600; }
.phone-demo-clickable { cursor: pointer; transition: background 0.15s, transform 0.15s, box-shadow 0.15s; }
.phone-demo-clickable:hover { background: var(--md-surface); box-shadow: 0 3px 10px rgba(16, 24, 40, 0.08); }
.phone-demo-clickable:active { transform: scale(0.985); }
.phone-demo-clickable:focus-visible,
.p-nav button:focus-visible,
.p-fab:focus-visible,
.phone-demo-sheet button:focus-visible,
.phone-demo-panel button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* 手机预览交互层：只覆盖演示内容，不改变官网外层页面路由 */
.phone-demo-panel {
  position: absolute;
  z-index: 6;
  inset: 51px 0 47px;
  overflow: auto;
  padding: 4px 12px 14px;
  background: var(--bg);
  scrollbar-width: none;
  contain: layout paint;
  animation: phoneDemoIn 0.18s ease-out both;
}
.phone-demo-panel::-webkit-scrollbar { display: none; }
.phone-demo-panel[hidden],
.phone-demo-sheet[hidden],
.phone-demo-feedback[hidden],
.phone-demo-tab-view[hidden],
.phone-demo-detail-mount[hidden],
.phone-demo-home-view[hidden],
.phone-demo .p-fab[hidden] { display: none; }
.phone-demo-view-mount,
.phone-demo-detail-mount { min-height: 100%; contain: layout; }
.phone-demo-panel .p-card { margin-bottom: 8px; }
.phone-demo-kicker {
  padding: 3px 4px 8px;
  color: var(--ink-faint);
  font-size: 9.5px;
  letter-spacing: 0.02em;
}
.phone-demo-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.phone-demo-stat b { font-size: 17px; color: var(--ink); }
.phone-demo-stat span { color: var(--ink-faint); font-size: 9.5px; }
.p-metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
.p-metric { padding: 9px 10px; border-radius: 12px; background: var(--md-surface-low); }
.p-metric b { display: block; font-size: 16px; color: var(--ink); }
.p-metric small { display: block; margin-top: 2px; color: var(--ink-faint); font-size: 8.5px; }
.p-chip-row { display: flex; gap: 5px; overflow: hidden; margin: 3px 0 8px; }
.p-chip { padding: 4px 8px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--ink-faint); font-size: 9px; white-space: nowrap; }
.p-chip.on { border-color: var(--brand); color: var(--md-on-primary-container); background: var(--md-primary-container); }
.p-summary-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5px; }
.p-summary { padding: 7px 3px; border-radius: 12px; background: var(--md-surface-low); text-align: center; }
.p-summary b { display: block; font-size: 13px; color: var(--ink); }
.p-summary small { display: block; margin-top: 2px; color: var(--ink-faint); font-size: 8px; }
.p-quick-list { display: grid; gap: 0; }
.p-quick { display: flex; align-items: center; gap: 7px; padding: 8px 3px; border-bottom: 1px solid var(--line); color: var(--ink); }
.p-quick:last-child { border-bottom: 0; }
.p-quick .ic { width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; border-radius: 6px; color: var(--brand); background: var(--brand-soft); font-size: 11px; }
.p-quick b { flex: 1; font-size: 10px; font-weight: 600; }
.p-quick span:last-child { color: var(--ink-faint); font-size: 13px; }
.phone-demo-note {
  color: var(--ink-faint);
  font-size: 9.5px;
  line-height: 1.45;
  padding: 2px 4px 0;
}
.phone-demo-detail-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 2px 0 10px;
}
.phone-demo-detail-back {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  color: var(--ink);
  background: var(--md-surface-low);
  font: 22px/1 var(--sans);
  cursor: pointer;
}
.phone-demo-detail-back:hover { background: var(--md-surface); }
.phone-demo-detail-head .phone-demo-kicker { padding: 0 0 1px; }
.phone-demo-detail-title { display: block; font-size: 13px; color: var(--ink); }
.phone-demo-detail-copy { color: var(--ink-dim); font-size: 10.5px; line-height: 1.55; padding: 2px 3px 10px; }
.phone-demo-detail-card {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 13px;
  border-radius: 14px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  margin-bottom: 10px;
}
.phone-demo-detail-card b { font-size: 18px; }
.phone-demo-detail-card span { font-size: 9px; opacity: 0.82; text-align: right; }
.phone-demo-detail-actions { display: flex; gap: 6px; margin-top: 8px; }
.phone-demo-detail-actions button {
  border: 0;
  border-radius: 999px;
  padding: 7px 11px;
  color: var(--md-on-primary);
  background: var(--brand);
  font: inherit;
  font-size: 10px;
  cursor: pointer;
}
.phone-demo-date-list { display: grid; gap: 5px; }
.phone-demo-date-option {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 7px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 8px 9px;
  color: var(--ink);
  background: var(--md-surface-low);
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.phone-demo-date-option:hover { border-color: var(--brand); background: var(--md-primary-container); }
.phone-demo-date-option b { font-size: 10px; color: var(--ink-dim); }
.phone-demo-date-option strong { font-size: 11px; }
.phone-demo-date-option small { color: var(--ink-faint); font-size: 9px; text-align: right; }
.phone-demo-setting-detail,
.phone-demo-form-preview,
.phone-demo-entry-preview {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 11px;
  margin-bottom: 7px;
  border-radius: 11px;
  background: var(--md-surface-low);
  color: var(--ink-dim);
  font-size: 9.5px;
  line-height: 1.45;
}
.phone-demo-setting-detail b { color: var(--ink); font-size: 10.5px; }
.phone-demo-form-preview { flex-direction: row; justify-content: space-between; color: var(--ink-faint); }
.phone-demo-form-preview b { color: var(--ink); font-size: 16px; }
.phone-demo-entry-preview { flex-direction: row; align-items: center; gap: 8px; }
.phone-demo-entry-preview span { color: var(--brand); font-size: 18px; }
.phone-demo-entry-preview b { color: var(--ink); font-size: 10.5px; }
.phone-demo-list-row,
.phone-demo-setting {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 7px;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 8px 4px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.phone-demo-list-row:last-child,
.phone-demo-setting:last-child { border-bottom: 0; }
.phone-demo-list-row > span:first-child,
.phone-demo-setting > span:nth-child(2) { flex: 1; min-width: 0; }
.phone-demo-list-row b,
.phone-demo-setting b { display: block; font-size: 10.5px; font-weight: 600; }
.phone-demo-list-row small,
.phone-demo-setting small { display: block; color: var(--ink-faint); font-size: 8.5px; margin-top: 2px; }
.phone-demo-list-row > span:last-child,
.phone-demo-setting > span:last-child { color: var(--ink-faint); font-size: 13px; }
.phone-demo-setting .ic {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--brand-soft);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
}
@keyframes phoneDemoIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: none; }
}

/* App PrimaryTabRow：选中蓝字 + 底部指示条 */
.p-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.p-tabs span {
  flex: 1;
  text-align: center;
  padding: 6px 0 5px;
  color: var(--ink-faint);
  font-size: 9.5px;
  position: relative;
}
.p-tabs span.on { color: var(--brand); font-weight: 600; }
.p-tabs span.on::after {
  content: "";
  position: absolute;
  left: 22%; right: 22%; bottom: 0;
  height: 2.5px;
  border-radius: 999px 999px 0 0;
  background: var(--brand);
}

.p-chart { display: flex; align-items: flex-end; gap: 5px; height: 64px; padding-top: 4px; }
.p-chart i {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: var(--brand-soft);
}
.p-chart i.hi { background: var(--brand); }

/* 12 周活跃热力图（概览页 CompactHeatmap 的示意） */
.p-heat {
  display: grid;
  grid-template-rows: repeat(7, 6px);
  grid-auto-flow: column;
  grid-auto-columns: 6px;
  gap: 2.5px;
  padding: 2px 0 4px;
}
.p-heat i { border-radius: 1.5px; background: var(--md-surface-high); }
.p-heat i.l1 { background: rgba(33, 150, 243, 0.25); }
.p-heat i.l2 { background: rgba(33, 150, 243, 0.5); }
.p-heat i.l3 { background: var(--brand); }
@media (prefers-color-scheme: dark) {
  .p-heat i.l1 { background: rgba(144, 202, 249, 0.25); }
  .p-heat i.l2 { background: rgba(144, 202, 249, 0.5); }
  .p-heat i.l3 { background: var(--brand); }
}

/* 聊天气泡：user = primaryContainer，ai = surfaceContainerLow（M3 惯例） */
.p-bubble {
  max-width: 82%;
  padding: 8px 11px;
  border-radius: 14px;
  margin-bottom: 8px;
  font-size: 10.5px;
  line-height: 1.55;
}
.p-bubble.user {
  margin-left: auto;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-bottom-right-radius: 4px;
}
.p-bubble.ai {
  background: var(--md-surface-low);
  color: var(--ink-dim);
  border-bottom-left-radius: 4px;
}
.p-bubble.ai .cursor {
  display: inline-block;
  width: 6px; height: 11px;
  background: var(--brand);
  vertical-align: -1px;
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 「我的」页头像：primary 径向渐变（MyScreen.UserProfileHeader） */
.p-avatar {
  width: 46px; height: 46px;
  border-radius: 50%;
  margin: 2px auto 8px;
  background: radial-gradient(circle at 50% 40%, var(--brand), var(--brand-deep));
  display: flex;
  align-items: center;
  justify-content: center;
}
.p-avatar svg { width: 24px; height: 24px; }
.p-me-name { text-align: center; font-weight: 700; font-size: 12.5px; }
.p-me-meta {
  text-align: center;
  color: var(--ink-faint);
  font-size: 9.5px;
  margin: 3px 0 10px;
}

/* 列表项（功能菜单 / 设置项）：40dp 圆角 10dp 图标块 + 两行文字 + 箭头 */
.p-set {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 2px;
  border-bottom: 1px solid var(--line);
}
.p-set:last-child { border-bottom: none; }
.p-set .ic {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 6px;              /* App 图标块 RoundedCornerShape(10dp) */
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
}
.p-set .tx { flex: 1; min-width: 0; }
.p-set .tx b { display: block; font-size: 10.5px; font-weight: 600; color: var(--ink); }
.p-set .tx small { display: block; font-size: 8.5px; color: var(--ink-faint); }
.p-set .arrow { color: var(--ink-faint); opacity: 0.6; font-size: 12px; }

/* FAB：App 用 secondaryContainer / onSecondaryContainer（HomeScreen） */
.p-fab {
  position: absolute;
  right: 12px;
  bottom: 46px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: 0;
  font-size: 21px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(2, 136, 209, 0.28);
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.p-fab:hover { transform: translateY(-1px); box-shadow: 0 8px 17px rgba(2, 136, 209, 0.34); }
.p-fab:active { transform: scale(0.94); }
.p-fab[aria-expanded="true"] { transform: rotate(45deg); }
.p-fab-stats { bottom: 111px; font-size: 17px; }
.p-fab-stats:hover { transform: translateY(-1px); }

/* 底部导航：半透明 surface + haze 24dp + primaryContainer 胶囊 */
.p-nav {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  gap: 2px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);   /* BottomNavBar haze 24dp */
  border-top: 1px solid color-mix(in srgb, var(--md-outline-variant) 70%, transparent);
  padding: 6px 6px 8px;
}
.p-nav button {
  flex: 1;
  text-align: center;
  font-size: 9px;
  color: var(--ink-faint);          /* onSurfaceVariant */
  padding: 4px 0;
  border-radius: 999px;
  border: 0;
  background: transparent;
  font-family: inherit;
  cursor: pointer;
}
.p-nav button span { display: block; flex: none; padding: 0; }
.p-nav .p-nav-icon { margin-bottom: 2px; font-size: 14px; line-height: 1; }
/* 选中态：primaryContainer 胶囊 + onPrimaryContainer */
.p-nav button.on {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-weight: 600;
}
.p-nav button.on .p-nav-icon { transform: scale(1.1); }

.phone-demo-sheet {
  position: absolute;
  z-index: 9;
  left: 10px;
  right: 10px;
  bottom: 47px;
  padding: 10px;
  border: 1px solid var(--md-card-border);
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg) 96%, transparent);
  box-shadow: 0 10px 24px rgba(16, 24, 40, 0.18);
  contain: layout paint;
  animation: phoneDemoIn 0.18s ease-out both;
}
.phone-demo-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2px 7px;
  color: var(--ink);
  font-size: 11px;
}
.phone-demo-close {
  width: 24px;
  height: 24px;
  border: 0;
  border-radius: 50%;
  color: var(--ink-faint);
  background: transparent;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
}
.phone-demo-close:hover { background: var(--md-surface-low); color: var(--ink); }
.phone-demo-entry-list { display: grid; gap: 4px; }
.phone-demo-entry-list button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 10px;
  padding: 7px 6px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.phone-demo-entry-list button:hover { background: var(--md-surface-low); }
.phone-demo-entry-list button > span:nth-child(2) { flex: 1; min-width: 0; }
.phone-demo-entry-list b { display: block; font-size: 10px; font-weight: 600; }
.phone-demo-entry-list small { display: block; color: var(--ink-faint); font-size: 8.5px; margin-top: 1px; }
.phone-demo-entry-icon {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  background: var(--brand-soft);
  font-size: 13px;
}
.phone-demo-arrow { color: var(--ink-faint); font-size: 13px; }
.phone-demo-feedback {
  position: absolute;
  z-index: 11;
  left: 12px;
  right: 12px;
  bottom: 52px;
  padding: 7px 9px;
  border-radius: 9px;
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
  font-size: 9.5px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.15s, transform 0.15s;
}
.phone-demo-feedback.show { opacity: 1; transform: none; }

.phone-caption {
  margin-top: 14px;
  text-align: center;
  color: var(--ink-faint);
  font-size: 12.5px;
}

/* 预览标注 */
.preview-note {
  margin-top: 18px;
  font-size: 12.5px;
  color: var(--ink-faint);
  text-align: center;
}

/* ---------- 首页功能区 ---------- */

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }

/* 功能卡 = App 卡片语言：白卡、18px 圆角、细边框 */
.feature-card {
  background: var(--panel);
  border: 1px solid var(--md-card-border);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover { border-color: var(--brand); transform: translateY(-2px); }

.feature-card .fc-icon {
  width: 40px; height: 40px;
  border-radius: 10px;             /* App 图标块 RoundedCornerShape(10dp) */
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 19px;
}
/* 色块底色全部来自 App 色板（primary/ChartPurple/SuccessGreen/饮水 cyan） */
.fc-icon.tint-blue { background: rgba(33, 150, 243, 0.13); }
.fc-icon.tint-purple { background: rgba(179, 157, 219, 0.18); }  /* ChartPurple #B39DDB */
.fc-icon.tint-green { background: rgba(76, 175, 80, 0.13); }     /* SuccessGreen */
.fc-icon.tint-cyan { background: rgba(38, 198, 218, 0.13); }     /* 饮水 #26C6DA */
.fc-icon.tint-teal { background: rgba(0, 188, 212, 0.12); }      /* TertiaryLight */

.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { color: var(--ink-dim); font-size: 14.5px; }
.feature-card ul { margin-top: 12px; list-style: none; }
.feature-card li {
  color: var(--ink-dim);
  font-size: 14px;
  padding: 5px 0 5px 18px;
  position: relative;
}
.feature-card li::before {
  content: "";
  position: absolute;
  left: 2px; top: 13px;
  width: 6px; height: 6px;
  border-radius: 999px;            /* 圆点，去 Stitch 方角 */
  background: var(--brand);
  opacity: 0.75;
}

/* 隐私横幅 */
.privacy-banner {
  border: 1px solid var(--md-card-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(600px 200px at 90% 0%, rgba(76, 175, 80, 0.06), transparent 60%),
    var(--md-surface-low);
  padding: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}
.privacy-banner h3 { font-size: 24px; margin-bottom: 12px; }
.privacy-banner p { color: var(--ink-dim); font-size: 15px; }
.privacy-points { display: grid; gap: 14px; align-content: center; }
.privacy-point {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.privacy-point .pp-ico {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: rgba(76, 175, 80, 0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}
.privacy-point b { display: block; font-size: 15px; margin-bottom: 2px; }
.privacy-point span { color: var(--ink-dim); font-size: 13.5px; }

/* 底部系统要求条 */
.sysbar {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}
.sysbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
  color: var(--ink-faint);
  font-size: 13.5px;
}
.sysbar b { color: var(--ink-dim); font-weight: 600; }

/* ---------- 章节分组（功能 / 帮助 / 隐私）
   去 Stitch 编号章节：左列改为普通小标题 ---------- */

.chapter {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 40px;
  padding: 44px 0;
  border-top: 1px solid var(--line);
}
.chapter:first-of-type { border-top: none; }

.chapter-no {
  font-size: 15px;
  color: var(--ink);
}
.chapter-no .ch-title {
  display: block;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}
.chapter-no .ch-sub { color: var(--ink-faint); font-size: 13.5px; line-height: 1.6; }

.chapter-body h3 { font-size: 24px; margin-bottom: 14px; }
.chapter-body p { color: var(--ink-dim); font-size: 15.5px; margin-bottom: 12px; }
.chapter-body p strong { color: var(--ink); font-weight: 600; }

.spec-list { list-style: none; margin: 16px 0 6px; display: grid; gap: 0; }
.spec-list li {
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
}
.spec-list li:last-child { border-bottom: none; }
.spec-list .k { color: var(--ink-faint); }
.spec-list .v { color: var(--ink-dim); }
.spec-list .v strong { color: var(--ink); font-weight: 600; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 4px; }
.chip {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 4px 13px;
  font-size: 13px;
  color: var(--ink-dim);
  background: var(--panel);
}
.chip.hl {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-soft);
}

.callout {
  border-left: 3px solid var(--brand);
  background: var(--brand-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
  margin: 16px 0 4px;
  font-size: 14.5px;
  color: var(--ink-dim);
}
.callout.warn { border-color: var(--orange); background: rgba(255, 152, 0, 0.09); }
.callout.safe { border-color: var(--green); background: rgba(76, 175, 80, 0.09); }
.callout b { color: var(--ink); }

.code-pill {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--md-surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 7px;
  color: var(--ink);
  word-break: break-all;
}

/* ---------- 下载视图 ---------- */

.download-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 24px; align-items: start; }

.dl-card {
  background: var(--panel);
  border: 1px solid var(--md-card-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-card);
}
.dl-card h3 { font-size: 21px; margin-bottom: 6px; }
.dl-card .dl-sub { color: var(--ink-dim); font-size: 14px; margin-bottom: 20px; }

/* 清单读取状态 */
.manifest-state { min-height: 210px; }
.state-loading {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 12px 0;
}
.state-loading .sl-line {
  height: 14px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--md-surface) 25%, var(--md-surface-high) 45%, var(--md-surface) 65%);
  background-size: 240% 100%;
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { 0% { background-position: 120% 0; } 100% { background-position: -120% 0; } }
.state-loading .sl-text { color: var(--ink-faint); font-size: 14px; }

.state-error {
  border: 1px dashed color-mix(in srgb, var(--red) 50%, transparent);
  border-radius: var(--radius-sm);
  padding: 20px;
  background: rgba(244, 67, 54, 0.05);
}
.state-error b { color: var(--red); display: block; margin-bottom: 6px; font-size: 15.5px; }
.state-error p { color: var(--ink-dim); font-size: 14px; margin-bottom: 14px; }

/* 版本信息表 */
.version-table { list-style: none; }
.version-table li {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
  align-items: baseline;
}
.version-table li:last-child { border-bottom: none; }
.version-table .k { color: var(--ink-faint); font-size: 13.5px; }
.version-table .v { color: var(--ink); word-break: break-all; }
.version-table .v.dim { color: var(--ink-dim); }

.sha-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--md-surface-low);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: 6px;
}
.sha-box code {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-dim);
  word-break: break-all;
  flex: 1;
  line-height: 1.5;
}
.copy-btn {
  flex-shrink: 0;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--ink-dim);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 12.5px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  font-family: var(--sans);
}
.copy-btn:hover { color: var(--brand); border-color: var(--brand); }
.copy-btn.done { color: var(--green); border-color: var(--green); }

.release-notes {
  background: var(--md-surface-low);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--ink-dim);
  white-space: pre-wrap;
  max-height: 220px;
  overflow: auto;
}

/* 安装步骤 */
.steps { list-style: none; counter-reset: step; margin-top: 8px; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 18px 44px;
  font-size: 14.5px;
  color: var(--ink-dim);
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 0;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid transparent;
  border-radius: 999px;
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
}
.steps li b { color: var(--ink); display: block; margin-bottom: 3px; font-size: 15px; }

/* 更新状态说明表 */
.state-list { list-style: none; margin-top: 10px; }
.state-list li {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.state-list li:last-child { border-bottom: none; }
.state-list .st-name { color: var(--ink); font-weight: 600; }
.state-list .st-name small { display: block; font-weight: 400; color: var(--ink-faint); font-size: 12px; }
.state-list .st-desc { color: var(--ink-dim); }

/* ---------- 更新记录 ---------- */

.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 6px; top: 8px; bottom: 8px;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--brand), var(--line));
}
.tl-item { position: relative; padding-bottom: 40px; }
.tl-item:last-child { padding-bottom: 8px; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -28.5px; top: 9px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--brand);
}
.tl-item.muted::before { border-color: var(--line-strong); }
.tl-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.tl-head h3 { font-size: 21px; }
.tl-badge {
  font-size: 11.5px;
  border-radius: 999px;
  padding: 2px 10px;
  border: 1px solid color-mix(in srgb, var(--green) 50%, transparent);
  color: var(--green);
  background: rgba(76, 175, 80, 0.09);
}
.tl-badge.prev { border-color: var(--line-strong); color: var(--ink-faint); background: transparent; }
.tl-date { color: var(--ink-faint); font-size: 13px; font-family: var(--mono); }
.tl-item p { color: var(--ink-dim); font-size: 14.5px; margin-bottom: 8px; max-width: 760px; }
.tl-item ul { list-style: none; max-width: 780px; }
.tl-item li {
  font-size: 14px;
  color: var(--ink-dim);
  padding: 3px 0 3px 16px;
  position: relative;
}
.tl-item li::before {
  content: "";
  position: absolute;
  left: 2px; top: 12px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--ink-faint);
  opacity: 0.6;
}
.tl-item li b { color: var(--ink); font-weight: 600; }

/* ---------- 帮助 / FAQ ---------- */

.help-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-bottom: 56px; }
.help-card {
  background: var(--panel);
  border: 1px solid var(--md-card-border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-card);
}
.help-card h4 { font-size: 16.5px; margin-bottom: 8px; }
.help-card p { color: var(--ink-dim); font-size: 14px; }

.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: none;
  border: none;
  color: var(--ink);
  font-size: 16.5px;
  font-weight: 600;
  font-family: var(--sans);
  text-align: left;
  padding: 20px 4px;
  cursor: pointer;
  line-height: 1.5;
}
.faq-q:hover { color: var(--brand); }
.faq-q .faq-arrow {
  flex-shrink: 0;
  transition: transform 0.25s;
  color: var(--ink-faint);
  font-size: 14px;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); color: var(--brand); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-a-inner {
  padding: 0 4px 22px;
  color: var(--ink-dim);
  font-size: 14.5px;
  max-width: 780px;
}
.faq-a-inner p { margin-bottom: 10px; }
.faq-a-inner p:last-child { margin-bottom: 0; }

/* ---------- 弹窗（M3 Dialog：白卡 + 大圆角） ---------- */

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(28, 27, 31, 0.45);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-mask.open { display: flex; }

.modal {
  background: var(--panel-2);
  border: 1px solid var(--md-card-border);
  border-radius: 24px;             /* M3 dialog 28dp 近似 */
  max-width: 480px;
  width: 100%;
  padding: 28px;
  box-shadow: var(--shadow-float);
  animation: modalIn 0.25s ease;
  max-height: 86vh;
  overflow: auto;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.modal h3 { font-size: 20px; margin-bottom: 12px; }
.modal p { color: var(--ink-dim); font-size: 14.5px; margin-bottom: 12px; }
.modal ul { list-style: none; margin: 14px 0 20px; }
.modal li {
  font-size: 14px;
  color: var(--ink-dim);
  padding: 7px 0 7px 24px;
  position: relative;
  border-bottom: 1px dashed var(--line);
}
.modal li:last-child { border-bottom: none; }
.modal li::before {
  content: "";
  position: absolute;
  left: 8px; top: 15px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand);
}
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 8px; }

/* ---------- Toast（App Snackbar：inverseSurface） ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%) translateY(20px);
  background: var(--snackbar-bg);
  color: var(--snackbar-ink);
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 120;
  box-shadow: var(--shadow-float);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  margin-top: 40px;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 52px 24px 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; margin-bottom: 12px; color: var(--ink); }
.footer-brand svg { width: 26px; height: 26px; border-radius: 7px; box-shadow: 0 1px 3px rgba(16,24,40,0.12); }
.footer-desc { color: var(--ink-faint); font-size: 13.5px; max-width: 340px; }
.footer-col h5 {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--ink-faint);
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-col a {
  display: block;
  color: var(--ink-dim);
  font-size: 14px;
  padding: 4px 0;
}
.footer-col a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  color: var(--ink-faint);
  font-size: 12.5px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .hero-inner { padding: 64px 24px 56px; }
  .hero-preview { margin-top: 58px; padding-bottom: 76px; }
  .phone-demo-pick { padding-left: 13px; padding-right: 13px; }
  .hero-field { opacity: 0.22; }
  .phone-demo-stage { min-height: 720px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .download-layout { grid-template-columns: 1fr; }
  .privacy-banner { grid-template-columns: 1fr; padding: 30px; }
  .chapter { grid-template-columns: 1fr; gap: 14px; padding: 36px 0; }
}

@media (max-width: 640px) {
  .hero-inner { padding: 58px 16px 56px; }
  .hero h1 { font-size: clamp(32px, 10vw, 46px); }
  .hero .hero-sub { font-size: 16px; }
  .hero-preview { margin-top: 42px; padding-bottom: 54px; }
  .hero-demo-copy { grid-template-columns: 1fr; gap: 8px; margin-bottom: 16px; }
  .hero-demo-count { order: 2; }
  .hero-demo-count strong { font-size: 30px; }
  .phone-demo-rail { display: flex; overflow-x: auto; border-radius: 13px; scrollbar-width: none; }
  .phone-demo-rail::-webkit-scrollbar { display: none; }
  .phone-demo-pick { flex: 0 0 132px; min-height: 62px; display: block; padding: 9px 11px; text-align: left; }
  .phone-demo-pick-no { display: block; font-size: 9px; margin-bottom: 2px; }
  .phone-demo-pick b { font-size: 12px; }
  .phone-demo-pick small { font-size: 9px; white-space: nowrap; }
  .phone-demo-stage {
    min-height: 700px;
    margin-top: 20px;
    padding: 48px 12px 64px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }
  .phone-demo-stage-label { top: 15px; left: 15px; font-size: 9px; }
  .hero-preview .hero-phone { grid-column: 1; width: 100%; margin-top: 28px; }
  .hero-preview .phone { width: min(360px, 100%); }
  .hero-preview .phone .screen { min-height: 570px; }
  .phone-demo-hotspot {
    position: absolute;
    top: 10px;
    right: 16px;
    left: auto;
    margin-left: 0;
    transform: none;
    gap: 6px;
  }
  .phone-demo-hotspot em { font-size: 10px; }
  .phone-demo-linkage { left: 50%; bottom: 15px; transform: translateX(-50%); gap: 5px; font-size: 9px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 52px 0 16px; }
  .section-head h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .spec-list li, .state-list li, .version-table li { grid-template-columns: 112px 1fr; gap: 10px; }
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions .btn { width: 100%; }
}

/* ---------- 无障碍：跟随系统减少动态效果 ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .view.active { animation: none; }
  .site-header,
  .p-nav,
  .modal-mask {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
  .site-header { background: var(--bg); }
  .p-nav { background: var(--bg); }
}