:root {
  --bg: #fff8f5;
  --bg-soft: #ffe8df;
  --text: #2b1b16;
  --text-soft: #6c4d43;
  --primary: #ff4d2a;
  --primary-strong: #cc3d21;
  --primary-soft: #ff7a5c;
  --line: #f2c9bc;
  --card: #fff2ed;
  --shadow: 0 20px 60px rgba(122, 26, 15, 0.12);
  --bg-grad-1: #ffd4c8;
  --bg-grad-2: #ffe6de;
  --grain-dot: rgba(122, 26, 15, 0.1);
  --compare-bg: #fff0e8;
  --compare-bad: #fff4ef;
  --compare-good: #ffe8df;
  --compare-good-line: #ffbba7;
  --demo-bg: #2e1c17;
  --demo-text: #ffd4c8;
  --demo-title: #fff2ed;
  --demo-badge: #ffad96;
  --footer-line: var(--line);
  --menu-bg-mobile: var(--bg);
  --theme-bg: color-mix(in oklab, white 60%, var(--bg) 40%);
  --theme-border: var(--line);
  --theme-text: var(--text-soft);
  --logo-shadow: 0 6px 16px rgba(122, 26, 15, 0.2);
  --header-bg: color-mix(in oklab, var(--bg) 86%, white 14%);
  --header-border: color-mix(in oklab, var(--line) 70%, transparent);
  --surface: color-mix(in oklab, var(--card) 78%, white 22%);
  --surface-soft: color-mix(in oklab, var(--card) 72%, white 28%);
  --surface-panel: color-mix(in oklab, white 52%, var(--card) 48%);
  --panel-grad-1: var(--card);
  --panel-grad-2: #ffe3d9;
  --chip-bg: color-mix(in oklab, var(--card) 64%, white 36%);
  --chip-border: var(--line);
  --chip-text: var(--text-soft);
  --ghost-bg: color-mix(in oklab, white 60%, var(--bg) 40%);
  --ghost-border: var(--line);
  --ghost-text: var(--primary-strong);
  --nav-hover: var(--primary-strong);
  --tab-bg: color-mix(in oklab, var(--card) 70%, white 30%);
  --tab-text: var(--text-soft);
  --eyebrow-color: var(--primary-strong);
  --cta-grad-1: #ffd3c5;
  --cta-grad-2: #ffc3ae;
  --cta-grad-3: #ffb093;
  --cta-border: #ff9f84;
  --cta-text: #7a1a0f;
  --motion-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-fast: 420ms;
  --motion-base: 640ms;
  --motion-slow: 900ms;
  --motion-y: 18px;
}

:root[data-theme='dark'] {
  --bg: #120d0c;
  --bg-soft: #1b1312;
  --text: #f8dfd6;
  --text-soft: #d9b7ab;
  --line: #4c3029;
  --card: #221716;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  --bg-grad-1: #2f1f1b;
  --bg-grad-2: #1f1513;
  --grain-dot: rgba(255, 122, 92, 0.12);
  --compare-bg: #181110;
  --compare-bad: #201614;
  --compare-good: #271714;
  --compare-good-line: #915040;
  --demo-bg: #0f0d12;
  --demo-text: #f1c7bb;
  --demo-title: #ffebe4;
  --demo-badge: #ff9b80;
  --footer-line: #412722;
  --menu-bg-mobile: #130f0e;
  --theme-bg: #201513;
  --theme-border: #5f3b32;
  --theme-text: #f3d3c8;
  --logo-shadow: 0 0 0 rgba(0, 0, 0, 0);
  --header-bg: color-mix(in oklab, var(--bg) 92%, #241715 8%);
  --header-border: color-mix(in oklab, var(--line) 72%, transparent);
  --surface: color-mix(in oklab, var(--card) 88%, #2a1a17 12%);
  --surface-soft: color-mix(in oklab, var(--card) 80%, #30201c 20%);
  --surface-panel: color-mix(in oklab, var(--card) 76%, #311f1c 24%);
  --panel-grad-1: #281b19;
  --panel-grad-2: #1f1615;
  --chip-bg: color-mix(in oklab, var(--card) 68%, #3a241f 32%);
  --chip-border: #664037;
  --chip-text: #f2c8bc;
  --ghost-bg: color-mix(in oklab, var(--card) 74%, #35231f 26%);
  --ghost-border: #74463a;
  --ghost-text: #ffd1c4;
  --nav-hover: #ffd2c7;
  --tab-bg: color-mix(in oklab, var(--card) 72%, #2d1e1b 28%);
  --tab-text: #efcdc2;
  --eyebrow-color: #ff9d86;
  --cta-grad-1: #3a201a;
  --cta-grad-2: #52271f;
  --cta-grad-3: #6a2f22;
  --cta-border: #8f4b3c;
  --cta-text: #ffe3da;
  --motion-fast: 480ms;
  --motion-base: 720ms;
  --motion-slow: 980ms;
  --motion-y: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: radial-gradient(circle at 85% -10%, var(--bg-grad-1) 0, transparent 35%),
    radial-gradient(circle at 10% 10%, var(--bg-grad-2) 0, transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background-image: radial-gradient(circle at 2px 2px, var(--grain-dot) 1px, transparent 0);
  background-size: 24px 24px;
}

.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

.section {
  padding: clamp(64px, 9vw, 120px) 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}

.nav-wrap {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 20px;
}

.brand {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 34px;
  height: 34px;
  display: block;
  border-radius: 10px;
  box-shadow: var(--logo-shadow);
}

.brand-name {
  font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  gap: 26px;
}

.nav-controls {
  margin-left: auto;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--theme-text);
  font-size: 0.92rem;
  font-weight: 600;
}

.theme-switch select {
  border-radius: 10px;
  border: 1px solid var(--theme-border);
  background: var(--theme-bg);
  color: var(--theme-text);
  min-height: 34px;
  padding: 0 10px;
  outline: none;
}

.theme-switch select:focus-visible {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 26%, transparent);
}

.site-nav a {
  text-decoration: none;
  color: var(--text-soft);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--nav-hover);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  border-radius: 12px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--eyebrow-color);
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: 1.08;
}

h2 {
  margin: 0 0 24px;
  font-size: clamp(1.6rem, 3.8vw, 2.8rem);
  line-height: 1.2;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.2rem;
}

.hero-subtitle {
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 48ch;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(130deg, var(--primary), var(--primary-strong));
  box-shadow: 0 14px 36px rgba(204, 61, 33, 0.28);
}

.btn-ghost {
  color: var(--ghost-text);
  border: 1px solid var(--ghost-border);
  background: var(--ghost-bg);
}

.hero-trust {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-trust span {
  font-size: 0.88rem;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--chip-border);
  color: var(--chip-text);
  background: var(--chip-bg);
}

.hero-panel {
  background: linear-gradient(170deg, var(--panel-grad-1), var(--panel-grad-2) 85%);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero-panel ol {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.hero-panel li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
}

.step-id {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
}

.compare {
  background: linear-gradient(180deg, transparent 0, var(--compare-bg) 100%);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.compare-card {
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--card);
}

.compare-card ul {
  margin: 0;
  padding-left: 20px;
}

.compare-card li + li {
  margin-top: 8px;
}

.is-bad {
  background: var(--compare-bad);
}

.is-good {
  background: var(--compare-good);
  border-color: var(--compare-good-line);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  min-height: 168px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in oklab, var(--primary) 40%, var(--line) 60%);
}

.feature-card p {
  margin: 0;
  color: var(--text-soft);
}

.demo-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.tab {
  border: 1px solid var(--line);
  background: var(--tab-bg);
  color: var(--tab-text);
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
}

.tab.is-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.demo-stage {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--demo-bg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.demo-screen {
  padding: clamp(24px, 4vw, 40px);
  color: var(--demo-text);
}

.screen-badge {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  color: var(--demo-badge);
  letter-spacing: 0.08em;
}

.demo-screen h3 {
  margin-top: 10px;
  color: var(--demo-title);
  font-size: clamp(1.3rem, 2.6vw, 2rem);
}

.demo-screen p {
  margin-top: 8px;
}

#demoSteps {
  margin: 18px 0 0;
  padding-left: 20px;
}

#demoSteps li + li {
  margin-top: 6px;
}

.trust-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
}

.trust-grid article {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  background: var(--surface-soft);
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-panel);
  padding: 12px 14px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  margin: 10px 0 0;
  color: var(--text-soft);
}

.final-cta-box {
  border-radius: 34px;
  padding: clamp(28px, 5vw, 56px);
  background: linear-gradient(130deg, var(--cta-grad-1), var(--cta-grad-2) 52%, var(--cta-grad-3));
  border: 1px solid var(--cta-border);
  box-shadow: var(--shadow);
}

.final-cta-box p {
  margin-top: 8px;
  color: var(--cta-text);
}

.waitlist-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 14px;
}

.waitlist-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--surface-soft);
}

.waitlist-card p {
  color: var(--text-soft);
}

.waitlist-form {
  margin-top: 14px;
  display: grid;
  gap: 12px;
}

.waitlist-form label {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.waitlist-form input,
.waitlist-form select {
  width: 100%;
  min-height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  padding: 0 12px;
  outline: none;
}

.waitlist-form input:focus-visible,
.waitlist-form select:focus-visible {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 24%, transparent);
}

.waitlist-message {
  min-height: 24px;
  margin: 0;
  font-size: 0.92rem;
}

.waitlist-message.is-success {
  color: #1a7a2e;
}

.waitlist-message.is-error {
  color: #c23323;
}

:root[data-theme='dark'] .waitlist-message.is-success {
  color: #90e7a0;
}

:root[data-theme='dark'] .waitlist-message.is-error {
  color: #ff9380;
}

.launch-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.site-footer {
  border-top: 1px solid var(--footer-line);
  padding: 24px 0;
}

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

.footer-wrap nav {
  display: flex;
  gap: 18px;
}

.footer-wrap a {
  text-decoration: none;
  color: var(--text-soft);
}

.hero-content {
  animation: enter-up var(--motion-base) var(--motion-ease) both;
}

.hero-panel {
  animation: enter-up var(--motion-slow) var(--motion-ease) both;
}

.js-enabled .section {
  opacity: 0;
  transform: translateY(var(--motion-y));
  transition:
    opacity var(--motion-base) var(--motion-ease),
    transform var(--motion-base) var(--motion-ease);
  will-change: opacity, transform;
}

.js-enabled .section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .feature-card,
.js-enabled .compare-card,
.js-enabled .trust-grid article,
.js-enabled .faq-list details {
  opacity: 0;
  transform: translateY(calc(var(--motion-y) * 0.75));
  transition:
    opacity var(--motion-fast) var(--motion-ease),
    transform var(--motion-fast) var(--motion-ease),
    border-color 0.2s ease;
}

.js-enabled .section.is-visible .feature-card,
.js-enabled .section.is-visible .compare-card,
.js-enabled .section.is-visible .trust-grid article,
.js-enabled .section.is-visible .faq-list details {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .section.is-visible .feature-card:nth-child(2),
.js-enabled .section.is-visible .compare-card:nth-child(2),
.js-enabled .section.is-visible .trust-grid article:nth-child(2),
.js-enabled .section.is-visible .faq-list details:nth-child(2) {
  transition-delay: 70ms;
}

.js-enabled .section.is-visible .feature-card:nth-child(3),
.js-enabled .section.is-visible .trust-grid article:nth-child(3),
.js-enabled .section.is-visible .faq-list details:nth-child(3) {
  transition-delay: 130ms;
}

.js-enabled .section.is-visible .feature-card:nth-child(4),
.js-enabled .section.is-visible .faq-list details:nth-child(4) {
  transition-delay: 190ms;
}

.js-enabled .section.is-visible .feature-card:nth-child(5) {
  transition-delay: 250ms;
}

.js-enabled .section.is-visible .feature-card:nth-child(6) {
  transition-delay: 310ms;
}

:root[data-theme='dark'] .grain {
  opacity: 0.2;
}

:root[data-theme='dark'] .btn-primary {
  box-shadow: 0 18px 42px rgba(255, 77, 42, 0.34);
}

:root[data-theme='dark'] .theme-switch select {
  box-shadow: inset 0 1px 0 rgba(255, 214, 200, 0.08);
}

:root[data-theme='dark'] .site-nav a {
  color: #e8c6bb;
}

@keyframes enter-up {
  from {
    opacity: 0;
    transform: translateY(var(--motion-y));
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .js-enabled .section,
  .js-enabled .feature-card,
  .js-enabled .compare-card,
  .js-enabled .trust-grid article,
  .js-enabled .faq-list details {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .compare-grid,
  .features-grid,
  .trust-grid,
  .waitlist-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--menu-bg-mobile);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 18px;
    flex-direction: column;
    display: none;
    margin-left: 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-controls {
    margin-left: auto;
  }

  .theme-switch span {
    display: none;
  }

  .menu-toggle {
    display: block;
    margin-left: 0;
  }
}