:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --panel: rgba(0, 0, 0, 0.04);
  --panel-2: rgba(0, 0, 0, 0.06);
  --text: rgba(11, 18, 32, 0.92);
  --muted: rgba(11, 18, 32, 0.7);
  --muted-2: rgba(11, 18, 32, 0.58);
  --border: rgba(11, 18, 32, 0.12);
  --shadow: rgba(11, 18, 32, 0.1);
  --card-shadow: 0 10px 24px rgba(11, 18, 32, 0.08);
  --card-shadow-soft: 0 8px 16px rgba(11, 18, 32, 0.06);
  --accent: #7c5cff;
  --accent-2: #3dd6ff;
  --danger: #ff5c87;
  --radius: 16px;
  --container: 1100px;
  --page-bg: radial-gradient(1600px 900px at 10% 0%, rgba(124, 92, 255, 0.12), transparent 70%),
    radial-gradient(1400px 900px at 95% 10%, rgba(61, 214, 255, 0.1), transparent 70%),
    radial-gradient(1500px 950px at 55% 95%, rgba(255, 92, 135, 0.08), transparent 75%), var(--bg);
  --header-bg: rgba(246, 247, 251, 0.78);
  --stat-bg: rgba(255, 255, 255, 0.7);
  --stat-border: rgba(11, 18, 32, 0.1);
  --hint-bg: rgba(255, 255, 255, 0.7);
  --hint-border: rgba(11, 18, 32, 0.12);
  --footer-bg: rgba(246, 247, 251, 0.82);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #070b15;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.7);
  --muted-2: rgba(255, 255, 255, 0.58);
  --border: rgba(255, 255, 255, 0.12);
  --shadow: rgba(0, 0, 0, 0.35);
  --card-shadow: 0 14px 40px var(--shadow);
  --card-shadow-soft: 0 14px 40px var(--shadow);
  --page-bg: radial-gradient(1200px 700px at 10% 10%, rgba(124, 92, 255, 0.24), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(61, 214, 255, 0.22), transparent 55%),
    radial-gradient(900px 650px at 60% 90%, rgba(255, 92, 135, 0.12), transparent 55%), var(--bg);
  --header-bg: rgba(7, 11, 21, 0.72);
  --stat-bg: rgba(0, 0, 0, 0.18);
  --stat-border: rgba(255, 255, 255, 0.08);
  --hint-bg: rgba(0, 0, 0, 0.18);
  --hint-border: rgba(255, 255, 255, 0.1);
  --footer-bg: rgba(7, 11, 21, 0.8);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  background: var(--page-bg);
  background-attachment: fixed;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
  background: transparent;
  color: var(--text);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 0;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 180px;
}

.brand__icon {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px var(--shadow);
}

.brand__name {
  font-weight: 650;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav__link {
  padding: 4px 6px;
  border-radius: 12px;
  color: var(--muted);
  border: 1px solid transparent;
}

.nav__btn {
  padding: 4px 6px;
  border-radius: 12px;
  color: var(--muted);
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  font: inherit;
}

.nav__link:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.nav__btn:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.hero {
  padding: 52px 0 30px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: start;
  gap: 22px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(124, 92, 255, 0.18), rgba(61, 214, 255, 0.12));
  border: 1px solid rgba(124, 92, 255, 0.35);
  color: var(--text);
  font-size: 13px;
}

.hero__title {
  margin: 14px 0 10px;
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.4px;
}

.hero__subtitle {
  margin: 0;
  font-size: 16px;
  color: var(--muted);
  max-width: 56ch;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.hero__note {
  margin: 16px 0 0;
  color: var(--muted-2);
  font-size: 13px;
}

.hero__note--important {
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--hint-bg);
  border: 1px solid var(--hint-border);
  color: var(--muted);
}

.hero__card {
  padding: 16px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.035));
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.stat {
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--stat-border);
  background: var(--stat-bg);
}

.stat + .stat {
  margin-top: 10px;
}

.stat__k {
  color: var(--muted-2);
  font-size: 12px;
  letter-spacing: 0.3px;
}

.stat__v {
  margin-top: 4px;
  font-weight: 620;
  font-size: 14px;
}

.section {
  padding: 46px 0;
}

.section__title {
  margin: 0 0 16px;
  font-size: 20px;
  letter-spacing: -0.2px;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border-radius: var(--radius);
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

.card--plain {
  background: var(--panel);
  box-shadow: var(--card-shadow-soft);
}

.card__title {
  margin: 0;
  font-size: 16px;
  letter-spacing: -0.15px;
}

.card__text {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.card--download {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  background: linear-gradient(180deg, rgba(124, 92, 255, 0.1), rgba(255, 255, 255, 0.04));
}

.card__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.card--link {
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.card--link:hover {
  transform: translateY(-2px);
  background: var(--panel-2);
  border-color: rgba(124, 92, 255, 0.35);
}

.card__meta {
  margin-top: 10px;
  color: var(--muted-2);
  font-size: 12px;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: 12px;
  height: 34px;
  padding: 0 12px;
  font-weight: 600;
  font-size: 14px;
  font-family: inherit;
  letter-spacing: 0.2px;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  line-height: 1;
  vertical-align: middle;
}

.btn--primary {
  border-color: rgba(124, 92, 255, 0.45);
  background: var(--panel);
}

.btn--primary:hover {
  background: var(--panel-2);
  border-color: rgba(124, 92, 255, 0.6);
}

.btn--ghost {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
}

.btn--ghost:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.hint {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--hint-bg);
  border: 1px solid var(--hint-border);
}

.hint__title {
  font-weight: 650;
  font-size: 13px;
}

.hint__text {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.footer {
  border-top: 1px solid var(--border);
  background: var(--footer-bg);
  padding: 24px 0;
  margin-top: 10px;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
}

.footer__icon {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
}

.footer__text {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.footer__link {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
}

.footer__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.footer__build {
  margin-top: 14px;
  padding: 12px 0 2px;
  border-top: 1px dashed var(--border);
  font-size: 11px;
  color: var(--muted-2);
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 50;
  padding: 0 18px;
  width: min(560px, calc(100% - 24px));
}

.toast__inner {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(10px);
  color: var(--text);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.modal__panel {
  position: relative;
  width: min(520px, 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.4);
  padding: 16px;
}

.modal__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.1px;
}

.modal__text {
  margin-top: 8px;
  color: var(--muted);
}

.modal__actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── 主题切换圆形波纹动画 (View Transitions API) ────────────────── */

/* 切换到暗色：新页面从圆心向外扩展 */
.theme-to-dark::view-transition-new(root) {
  animation: ripple-expand 0.55s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  clip-path: circle(0% at var(--ripple-x) var(--ripple-y));
  z-index: 1;
}
.theme-to-dark::view-transition-old(root) {
  animation: none;
  z-index: 0;
}

/* 切换到明色：新页面从圆心向外扩展（与暗色完全对称） */
.theme-to-light::view-transition-new(root) {
  animation: ripple-expand 0.55s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  clip-path: circle(0% at var(--ripple-x) var(--ripple-y));
  z-index: 1;
}
.theme-to-light::view-transition-old(root) {
  animation: none;
  z-index: 0;
}

@keyframes ripple-expand {
  from { clip-path: circle(0% at var(--ripple-x) var(--ripple-y)); }
  to   { clip-path: circle(var(--ripple-r) at var(--ripple-x) var(--ripple-y)); }
}

/* 通用：关闭默认的淡入淡出 */
::view-transition-old(root),
::view-transition-new(root) {
  mix-blend-mode: normal;
  animation-duration: 0.55s;
}

/* ── 主题切换按钮样式优化 ────────────────────────────────────────── */
.nav__btn#themeToggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
}
.nav__btn#themeToggle:hover {
  color: var(--text);
  background: var(--panel-2);
  border-color: rgba(124, 92, 255, 0.4);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.12);
}
.nav__btn#themeToggle svg {
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .grid--2 {
    grid-template-columns: 1fr;
  }
  .brand {
    min-width: auto;
  }
}