/* AIZB — 对齐 Cursor 暗色营销页：暖炭黑底、琥珀强调、卡片悬停上浮与光晕 */

:root {
  --bg-page: #0b0a09;
  --bg-elevated: #141312;
  --bg-subtle: #11100f;
  --bg-header: rgba(11, 10, 9, 0.82);
  --text: #ffffff;
  --text-secondary: #9b9a97;
  --text-tertiary: #6b6966;
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(226, 126, 59, 0.45);
  --accent: #e27e3b;
  --accent-mid: #d97706;
  --accent-hover: #f0a060;
  --accent-text: #0b0a09;
  --glow-amber: rgba(226, 126, 59, 0.22);
  --link: #e8a060;
  --link-hover: #f5c49a;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Inter", "Noto Sans SC", system-ui, sans-serif;
  --max-w: min(1120px, 100% - 8vw);
  --header-h: 56px;
  --header-offset: 56px;
  --card-lift: -5px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card,
  .split__item,
  .footer__qr-wrap {
    transition: none !important;
  }

  .card:hover,
  .split__item:hover,
  .footer__qr-wrap:hover {
    transform: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg-page);
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background: rgba(226, 126, 59, 0.35);
  color: var(--text);
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.2s var(--ease-out), opacity 0.2s var(--ease-out);
}

a:hover {
  color: var(--link-hover);
}

/* —— 全屏区块：至少一屏高，内容垂直水平居中（随视口 dvh/vh 变化） —— */
.screen {
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-offset);
  padding-bottom: clamp(24px, 4vh, 40px);
  padding-left: max(24px, 4vw);
  padding-right: max(24px, 4vw);
  box-sizing: border-box;
}

.screen > * {
  width: 100%;
  max-width: var(--max-w);
}

.footer.screen > * {
  max-width: 520px;
}

/* —— 顶栏：固定顶部 —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  min-height: var(--header-h);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding: 12px max(24px, 4vw);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(140%) blur(16px);
}

.logo {
  order: 1;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.logo:hover {
  color: var(--text);
  opacity: 0.85;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  order: 3;
  width: 100%;
  padding-top: 8px;
  margin: 0 -4px;
  border-top: 1px solid var(--border);
  -webkit-overflow-scrolling: touch;
}

.nav a {
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color 0.2s var(--ease-out), background 0.2s var(--ease-out);
}

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

@media (min-width: 900px) {
  .site-header {
    flex-wrap: nowrap;
    padding-top: 0;
    padding-bottom: 0;
    height: var(--header-h);
  }

  .logo {
    order: 0;
  }

  .site-header__actions {
    order: 0;
    margin-left: 0;
  }

  .nav {
    order: 0;
    width: auto;
    padding-top: 0;
    margin: 0;
    border-top: none;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    gap: 8px;
  }

  .nav a {
    font-size: 14px;
  }
}

.site-header__actions {
  order: 2;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-downloads {
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  transition:
    background 0.2s var(--ease-out),
    border-color 0.2s var(--ease-out),
    color 0.2s var(--ease-out),
    transform 0.2s var(--ease-out),
    box-shadow 0.2s var(--ease-out);
}

.header-download--win:hover {
  color: var(--text);
  background: rgba(226, 126, 59, 0.12);
  border-color: rgba(226, 126, 59, 0.4);
  box-shadow: 0 0 0 1px rgba(226, 126, 59, 0.15);
  transform: translateY(-1px);
}

.header-download--mac {
  color: var(--text-tertiary);
  background: transparent;
  border-color: transparent;
  cursor: default;
  font-weight: 500;
}

/* —— 按钮：主按钮琥珀底 + 深色字（Cursor Continue 风格） —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background 0.2s var(--ease-out),
    color 0.2s var(--ease-out),
    border-color 0.2s var(--ease-out),
    transform 0.15s var(--ease-out),
    box-shadow 0.2s var(--ease-out);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.12) inset;
}

.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--accent-text);
  box-shadow:
    0 0 0 1px rgba(226, 126, 59, 0.35),
    0 8px 28px var(--glow-amber);
}

.btn--outline {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn--outline:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.btn--ghost {
  min-height: 36px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border-color: transparent;
}

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

.btn--lg {
  min-height: 48px;
  padding: 0 24px;
  font-size: 15px;
}

.section.screen {
  gap: clamp(1.25rem, 3vh, 2rem);
}

/* —— Hero —— */
.hero {
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 70% at 50% 0%, rgba(226, 126, 59, 0.14), transparent 52%),
    radial-gradient(ellipse 60% 45% at 80% 60%, rgba(217, 119, 6, 0.06), transparent 50%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.hero__title {
  margin: 0 auto 24px;
  font-size: clamp(34px, 6vw, 60px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--text);
  max-width: 920px;
}

.hero__title-line {
  display: block;
}

.hero__title-line--accent {
  margin-top: 10px;
  color: var(--text-secondary);
  font-weight: 600;
}

.hero__lead {
  margin: 0 auto 32px;
  max-width: 580px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.hero__lead strong {
  color: var(--text);
  font-weight: 600;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

/* —— 区块 —— */
.section {
  position: relative;
  border-top: 1px solid var(--border);
}

.section--muted {
  background: var(--bg-subtle);
}

.section--surface {
  background: var(--bg-page);
}

.section__head {
  margin: 0 auto 0;
  text-align: center;
}

.screen .section__head {
  margin-bottom: clamp(1.25rem, 3vh, 2rem);
}

.section__title {
  margin: 0 0 12px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.18;
  color: var(--text);
}

.section__subtitle {
  margin: 0;
  font-size: 15px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* —— 卡片：悬停上浮 + 琥珀光晕边框 —— */
.cards {
  margin: 0 auto;
  display: grid;
  gap: 16px;
  text-align: left;
}

@media (min-width: 700px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  position: relative;
  padding: 28px 24px 28px 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 0 0 transparent;
  transition:
    transform 0.28s var(--ease-out),
    border-color 0.28s var(--ease-out),
    box-shadow 0.28s var(--ease-out),
    background 0.28s var(--ease-out);
}

.card:hover {
  transform: translateY(var(--card-lift));
  border-color: var(--border-hover);
  box-shadow:
    0 0 0 1px rgba(226, 126, 59, 0.12),
    0 12px 40px rgba(0, 0, 0, 0.45),
    0 0 48px var(--glow-amber);
}

.card__num {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.card__title {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--text);
}

.card__plain {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.card__plain strong {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
}

.card__hype {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  transition: border-color 0.28s var(--ease-out);
}

.card:hover .card__hype {
  border-color: rgba(255, 255, 255, 0.14);
}

/* —— 分栏 —— */
.split {
  margin: 0 auto;
  display: grid;
  gap: 16px;
  text-align: left;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.split--two {
  gap: 16px;
}

.split__item {
  padding: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition:
    transform 0.28s var(--ease-out),
    border-color 0.28s var(--ease-out),
    box-shadow 0.28s var(--ease-out);
}

.split__item:hover {
  transform: translateY(var(--card-lift));
  border-color: var(--border-hover);
  box-shadow:
    0 0 0 1px rgba(226, 126, 59, 0.1),
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 40px var(--glow-amber);
}

.split__item--border {
  border-left: 3px solid var(--accent-mid);
}

.split__item--border:hover {
  border-left-color: var(--accent-hover);
}

.split__h {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.split__detail {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.split__detail strong {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
}

.split__hype {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.split__hype strong {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 600;
}

/* —— 页脚 —— */
.footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
}

.footer__inner {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
}

.footer__title {
  margin: 0 0 16px;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.footer__text {
  margin: 0 0 28px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.footer__brand {
  margin: 0 0 24px;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-tertiary);
}

.footer__brand strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.footer__qr {
  margin-bottom: 24px;
}

.footer__qr-wrap {
  display: inline-block;
  padding: 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition:
    transform 0.28s var(--ease-out),
    border-color 0.28s var(--ease-out),
    box-shadow 0.28s var(--ease-out);
}

.footer__qr-wrap:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 36px var(--glow-amber);
}

.footer__qr-img {
  display: block;
  width: 168px;
  height: 168px;
  border-radius: calc(var(--radius-md) - 4px);
  object-fit: cover;
  background: #1a1918;
}

.footer__qr-fallback {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

.footer__qr-fallback code {
  font-size: 12px;
  padding: 2px 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
}

.footer__contact {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.footer__contact a {
  font-weight: 600;
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.footer__contact a:hover {
  color: var(--link-hover);
  border-bottom-color: rgba(240, 160, 96, 0.45);
}

.footer__company {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer__actions {
  margin-bottom: 32px;
}

.footer__copy {
  margin: 0;
  font-size: 12px;
  color: var(--text-tertiary);
  letter-spacing: 0.01em;
}