:root {
  /* iOS system palette — 白色调 light */
  --bg: #ffffff;             /* 纯白页面底 */
  --card: #ffffff;           /* 白卡片，靠发丝边+浅阴影分层 */
  --field: #f0f0f4;          /* 搜索框填充 */
  --ink: #1c1c1e;            /* label */
  --sub: #8a8a8e;            /* secondaryLabel */
  --tri: #c7c7cc;           /* tertiaryLabel / chevron */
  --sep: rgba(60, 60, 67, 0.09);
  --card-border: rgba(0, 0, 0, 0.07);
  --accent: #007aff;         /* systemBlue */
  --chip: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.82);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 6px 18px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.06), 0 18px 40px rgba(0, 0, 0, 0.10);
  --title-grad: none;
  --radius: 22px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --field: #1c1c1e;
    --ink: #f5f5f7;
    --sub: #8d8d93;
    --tri: #48484a;
    --sep: rgba(84, 84, 88, 0.5);
    --card-border: rgba(255, 255, 255, 0.08);
    --accent: #0a84ff;
    --chip: #1c1c1e;
    --nav-bg: rgba(0, 0, 0, 0.72);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 12px 34px rgba(0, 0, 0, 0.6);
  }
}

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

html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.47;
  letter-spacing: -0.01em;
  transition: background 0.3s, color 0.3s;
  padding-bottom: env(safe-area-inset-bottom);
}

/* ---------- 导航（毛玻璃小标题） ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--sep);
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
}
.nav-title { font-size: 17px; font-weight: 600; letter-spacing: -0.02em; }

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 60px 20px 34px;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  translate: -50% 0;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 6%, transparent) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.hero-badge {
  width: 66px; height: 66px;
  margin: 0 auto 22px;
  border-radius: 20px;
  display: grid; place-items: center;
  color: #fff;
  background: linear-gradient(160deg, #2f9bff 0%, #0060df 100%);
  box-shadow: 0 10px 26px rgba(0, 122, 255, 0.4);
  transition: transform 0.4s cubic-bezier(0.2,0.7,0.2,1), box-shadow 0.4s;
}
.hero-badge:hover {
  transform: scale(1.06);
  box-shadow: 0 14px 34px rgba(0, 122, 255, 0.5);
}
.hero-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(180deg, var(--ink) 0%, #555 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 17px;
  color: var(--sub);
  margin-top: 10px;
}

/* ---------- iOS 搜索框 ---------- */
.search-box {
  position: relative;
  margin: 30px auto 0;
  max-width: 480px;
  display: flex;
  align-items: center;
  background: var(--field);
  border-radius: 14px;
  height: 50px;
  padding: 0 12px 0 40px;
  transition: box-shadow 0.25s, background 0.2s;
}
.search-box:focus-within {
  background: var(--card);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}
.field-ico {
  position: absolute;
  left: 13px; top: 50%;
  transform: translateY(-50%);
  color: var(--sub);
  pointer-events: none;
}
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 17px;
  background: transparent;
  color: var(--ink);
  font-family: var(--font);
}
.search-box input::placeholder { color: var(--sub); }
.search-box input::-webkit-search-cancel-button { -webkit-appearance: none; }

.kbd-hint {
  font-size: 12px;
  color: var(--sub);
  background: color-mix(in srgb, var(--sub) 14%, transparent);
  border-radius: 6px;
  padding: 3px 7px;
  font-family: var(--font);
  user-select: none;
}
.search-box:focus-within .kbd-hint { display: none; }

.clear-btn {
  border: none; background: none; cursor: pointer;
  color: var(--tri); display: grid; place-items: center;
  padding: 4px; margin-left: 4px;
  transition: color 0.2s, transform 0.15s;
}
.clear-btn:hover { color: var(--sub); }
.clear-btn:active { transform: scale(0.85); }

/* Spinner（加载态） */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  display: none;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.search-box.loading .ico-search { display: none; }
.search-box.loading .spinner { display: block; }

/* ---------- 最近搜索 ---------- */
.history { margin: 20px auto 0; max-width: 480px; text-align: left; }
.history-label { font-size: 13px; color: var(--sub); padding-left: 4px; }
.history-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  font-size: 15px;
  color: var(--accent);
  background: var(--chip);
  border: 0.5px solid var(--sep);
  border-radius: 980px;
  padding: 7px 8px 7px 15px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.18s cubic-bezier(0.2,0.7,0.2,1);
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font);
}
.chip:active { transform: scale(0.94); }
.chip .x { color: var(--tri); font-size: 17px; line-height: 0.8; padding: 0 4px; }
.chip .x:hover { color: var(--sub); }

.hero-hint { margin-top: 22px; font-size: 14px; color: var(--sub); }

/* ---------- 结果 ---------- */
.results { max-width: 1120px; margin: 8px auto 0; padding: 16px 24px 60px; }
.results-head { text-align: center; margin-bottom: 26px; }
.results-head h2 { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.results-note { color: var(--sub); font-size: 14px; margin-top: 6px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
  list-style: none;
}

/* iOS 卡片 */
.card {
  background: var(--card);
  border: 0.5px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 3px;
  box-shadow: var(--shadow);
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.28s;
  position: relative;
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  animation: rise 0.5s cubic-bezier(0.2,0.7,0.2,1) forwards;
}
@keyframes rise { to { opacity: 1; transform: translateY(0) scale(1); } }
@media (hover: hover) {
  .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
}
.card:active { transform: scale(0.97); }
.card:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; }

.card .dot {
  position: relative;
  width: 46px; height: 46px; border-radius: 13px;
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 21px;
  margin-bottom: 12px;
  background:
    linear-gradient(160deg,
      color-mix(in srgb, var(--dot, var(--accent)) 78%, white) 0%,
      var(--dot, var(--accent)) 60%,
      color-mix(in srgb, var(--dot, var(--accent)) 88%, black) 100%);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--ink) 12%, transparent);
  overflow: hidden;
}
.card .dot .letter {
  position: relative; z-index: 1;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}
.card .dot::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.28), transparent 55%);
}
.card .dot.has-logo::before { display: none; }
.card .dot .logo {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 9px;
  opacity: 0;
  transition: opacity 0.3s;
}
/* logo 加载成功：换成干净的白色 iOS 图标底，隐藏首字母 */
.card .dot.has-logo {
  background: #fff;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--ink) 12%, transparent),
    inset 0 0 0 0.5px var(--sep);
}
.card .dot.has-logo .letter { display: none; }
.card .dot.has-logo .logo { opacity: 1; }
.card .cat {
  font-size: 11px; color: var(--sub);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.card .name { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.card .desc { font-size: 14px; color: var(--sub); line-height: 1.35; }
.card .chev {
  position: absolute; top: 20px; right: 16px;
  color: var(--tri); transition: transform 0.25s, color 0.2s;
}
.card:hover .chev { transform: translateX(3px); color: var(--accent); }

/* 骨架屏 */
.skeleton {
  background: var(--card);
  border: 0.5px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 10px;
}
.skeleton .bar { height: 11px; border-radius: 6px; background: color-mix(in srgb, var(--ink) 8%, transparent); overflow: hidden; position: relative; }
.skeleton .bar.sq { width: 46px; height: 46px; border-radius: 13px; margin-bottom: 12px; }
.skeleton .bar.w60 { width: 60%; } .skeleton .bar.w40 { width: 40%; } .skeleton .bar.w80 { width: 80%; }
.skeleton .bar::after {
  content: ""; position: absolute; inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--ink) 6%, transparent), transparent);
  animation: shimmer 1.3s infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }

/* 空 / 错误状态 */
.state-box {
  text-align: center;
  padding: 46px 22px;
  background: var(--card);
  border: 0.5px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--sub);
}
.state-box .emoji { font-size: 44px; }
.state-box .msg { margin-top: 12px; font-size: 18px; font-weight: 600; color: var(--ink); }
.state-box .sub { margin-top: 6px; font-size: 14px; }
.state-box .retry {
  margin-top: 22px;
  border: none; cursor: pointer;
  background: var(--accent); color: #fff;
  font-size: 16px; font-weight: 600;
  padding: 11px 26px; border-radius: 980px;
  transition: transform 0.15s;
  font-family: var(--font);
}
.state-box .retry:active { transform: scale(0.94); }

/* Footer */
.footer {
  text-align: center;
  padding: 30px 22px calc(50px + env(safe-area-inset-bottom));
  color: var(--sub);
  font-size: 12px;
}
.footer-sub { margin-top: 6px; }
.footer code {
  background: color-mix(in srgb, var(--sub) 14%, transparent);
  padding: 2px 6px; border-radius: 5px; font-size: 11px;
}

@media (max-width: 560px) {
  .hero { padding-top: 40px; }
  .hero-title { font-size: 28px; }
  .hero-sub { font-size: 16px; }
  .kbd-hint { display: none; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
}

/* 桌面大屏：用好横向空间，字号与留白放大 */
@media (min-width: 1024px) {
  .hero { max-width: 760px; padding: 90px 20px 50px; }
  .hero::before { width: 800px; height: 800px; top: -160px; }
  .hero-badge { width: 86px; height: 86px; border-radius: 24px; margin-bottom: 30px; }
  .hero-badge svg { width: 36px; height: 36px; }
  .hero-title { font-size: 52px; }
  .hero-sub { font-size: 21px; margin-top: 14px; }
  .search-box { max-width: 580px; height: 58px; border-radius: 16px; padding: 0 14px 0 46px; margin-top: 36px; }
  .search-box input { font-size: 19px; }
  .field-ico { left: 15px; }
  .field-ico svg { width: 21px; height: 21px; }
  .history { max-width: 580px; }
  .results { padding: 24px 32px 80px; }
  .results-head { margin-bottom: 36px; }
  .results-head h2 { font-size: 30px; }
  .grid { grid-template-columns: repeat(4, 1fr); gap: 22px; }
  .card { padding: 24px; border-radius: 24px; }
  .card .dot { width: 54px; height: 54px; border-radius: 16px; font-size: 24px; margin-bottom: 14px; }
  .card .cat { font-size: 11px; }
  .card .name { font-size: 20px; }
  .card .desc { font-size: 14px; }
  .card .chev { top: 22px; right: 18px; }
  .card .chev svg { width: 10px; height: 16px; }
  .skeleton { padding: 24px; border-radius: 24px; }
  .skeleton .bar { height: 12px; }
  .skeleton .bar.sq { width: 54px; height: 54px; border-radius: 16px; }
  .state-box { padding: 56px 32px; }
  .state-box .emoji { font-size: 52px; }
  .state-box .msg { font-size: 20px; }
  .footer { padding: 40px 24px 60px; font-size: 13px; }
}

@media (min-width: 1360px) {
  .hero { max-width: 820px; padding: 100px 20px 56px; }
  .hero::before { width: 960px; height: 960px; top: -200px; }
  .hero-badge { width: 96px; height: 96px; border-radius: 26px; margin-bottom: 34px; }
  .hero-badge svg { width: 40px; height: 40px; }
  .hero-title { font-size: 58px; }
  .hero-sub { font-size: 22px; }
  .search-box { max-width: 600px; height: 62px; border-radius: 18px; padding: 0 16px 0 50px; }
  .search-box input { font-size: 20px; }
  .grid { grid-template-columns: repeat(5, 1fr); gap: 24px; }
  .card { padding: 26px; }
  .card .dot { width: 58px; height: 58px; border-radius: 17px; font-size: 26px; }
  .card .name { font-size: 21px; }
  .nav-inner { height: 52px; }
  .nav-title { font-size: 18px; }
  .results { padding: 28px 40px 100px; max-width: 1320px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}