/* ==========================================================
   Luyao Pro - Landing Page Styles
   ========================================================== */

:root {
  --bg: #FAF6F0;
  --bg-light: #FFFFFF;
  --dark: #2B1F18;
  --amber: #A87549;
  --amber-light: #C68B5A;
  --brown: #7E5436;
  --cream: #F0E4D2;
  --cream-light: #FBF7F1;
  --paypal: #FFC439;
  --star: #FFB229;
  --border: #E8DDD0;
  --text: #2B1F18;
  --text-muted: #6B5A4A;
  --text-light: #9A8878;

  --ds-deepseek: #4D6BFE;
  --ds-doubao: #FF5757;
  --ds-qwen: #615CED;
  --ds-glm: #3362F9;
  --ds-kimi: #1A1A1A;

  --shadow-sm: 0 1px 2px rgba(43, 31, 24, 0.04);
  --shadow-md: 0 4px 12px rgba(43, 31, 24, 0.06);
  --shadow-lg: 0 12px 32px rgba(43, 31, 24, 0.08);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --container: 1200px;
  --section-py: 96px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

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

button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--dark);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 18px;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  margin-bottom: 64px;
}

.section { padding: var(--section-py) 0; }

.section--dark {
  background: var(--dark);
  color: #FAF6F0;
}
.section--dark .section-title { color: #FAF6F0; }
.section--dark .section-sub { color: rgba(250, 246, 240, 0.72); }

/* ==========================================================
   Announcement Bar
   ========================================================== */
.announcement {
  background: var(--dark);
  color: rgba(250, 246, 240, 0.88);
  text-align: center;
  padding: 12px 24px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ==========================================================
   Header
   ========================================================== */
.header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--dark);
}
.logo__badge {
  background: var(--amber);
  color: var(--bg);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}
.nav a:hover { color: var(--dark); }
.header__actions { display: flex; align-items: center; gap: 16px; }
.btn--ghost {
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  transition: all 0.2s;
}
.btn--ghost:hover { background: var(--cream-light); }
.btn--primary {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  border-radius: 999px;
  background: var(--dark);
  transition: all 0.2s;
}
.btn--primary:hover { background: #1a1108; transform: translateY(-1px); }
.btn--amber {
  background: var(--amber);
  color: #fff;
}
.btn--amber:hover { background: #8B5F3A; }
.btn--lg {
  padding: 16px 32px;
  font-size: 16px;
}

/* ==========================================================
   Hero
   ========================================================== */
.hero {
  padding: 80px 0 96px;
  background: var(--bg);
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero__title {
  font-size: clamp(36px, 5.2vw, 60px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--dark);
  margin-bottom: 24px;
}
.hero__sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 540px;
}
.hero__ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.btn--play {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.btn--play:hover { background: var(--cream-light); }
.btn--play svg { width: 16px; height: 16px; }
.hero__proof {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}
.hero__avatars {
  display: flex;
}
.hero__avatars span {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--bg);
  display: inline-block;
  margin-left: -8px;
  background-size: cover;
  background-position: center;
}
.hero__avatars span:first-child { margin-left: 0; background: linear-gradient(135deg, #C68B5A, #A87549); }
.hero__avatars span:nth-child(2) { background: linear-gradient(135deg, #7E5436, #5C3D26); }
.hero__avatars span:nth-child(3) { background: linear-gradient(135deg, #A87549, #7E5436); }
.hero__avatars span:nth-child(4) { background: linear-gradient(135deg, #C68B5A, #7E5436); }
.hero__avatars span:nth-child(5) { background: linear-gradient(135deg, #5C3D26, #2B1F18); }
.hero__proof-text { display: flex; flex-direction: column; }
.hero__proof-text strong { color: var(--dark); font-weight: 600; }
.hero__proof-text span { color: var(--text-muted); font-size: 13px; }
.hero__stars { color: var(--star); margin-right: 4px; letter-spacing: 1px; }

.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--cream);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__product {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right center;
  background: var(--cream);
}
.hero__badge {
  position: absolute;
  background: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--dark);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero__badge--online { top: 32px; left: 32px; }
.hero__badge--battery { bottom: 32px; right: 32px; }
.hero__badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #2BB673;
}

/* ==========================================================
   Stats Bar
   ========================================================== */
.stats {
  background: var(--dark);
  padding: 56px 0;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat__num {
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--bg);
  line-height: 1;
  margin-bottom: 10px;
}
.stat__num span { color: var(--amber); }
.stat__label {
  font-size: 14px;
  font-weight: 500;
  color: rgba(250, 246, 240, 0.6);
  letter-spacing: 0.02em;
}

/* ==========================================================
   Features (3 cards)
   ========================================================== */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--amber-light);
}
.card__icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--amber);
}
.card__icon svg { width: 28px; height: 28px; }
.card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}
.card__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ==========================================================
   Customization (4 cards)
   ========================================================== */
.custom__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.custom__card {
  background: var(--cream-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: left;
  border: 1px solid var(--border);
}
.custom__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--amber);
}
.custom__icon svg { width: 22px; height: 22px; }
.custom__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}
.custom__text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-muted);
}

/* ==========================================================
   AI Models (5 cards)
   ========================================================== */
.models__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.model__card {
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}
.model__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}
.model__card--deepseek::before { background: var(--ds-deepseek); }
.model__card--doubao::before { background: var(--ds-doubao); }
.model__card--qwen::before { background: var(--ds-qwen); }
.model__card--glm::before { background: var(--ds-glm); }
.model__card--kimi::before { background: var(--ds-kimi); }
.model__card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.model__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin: 8px 0 4px;
}
.model__name--deepseek { color: var(--ds-deepseek); }
.model__name--doubao { color: var(--ds-doubao); }
.model__name--qwen { color: var(--ds-qwen); }
.model__name--glm { color: var(--ds-glm); }
.model__name--kimi { color: var(--ds-kimi); }
.model__desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}
.model__icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
}
.model__icon--deepseek { background: var(--ds-deepseek); }
.model__icon--doubao { background: var(--ds-doubao); }
.model__icon--qwen { background: var(--ds-qwen); }
.model__icon--glm { background: var(--ds-glm); }
.model__icon--kimi { background: var(--ds-kimi); }

/* ==========================================================
   How It Works
   ========================================================== */
.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.step__card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
}
.step__num {
  font-size: 56px;
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.04em;
}
.step__time {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  background: var(--cream);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.step__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.step__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ==========================================================
   Specs
   ========================================================== */
.specs__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.spec__card {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: left;
}
.spec__value {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 8px;
}
.spec__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--brown);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.spec__text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ==========================================================
   Testimonials
   ========================================================== */
.testi__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.testi__card {
  background: rgba(250, 246, 240, 0.04);
  border: 1px solid rgba(250, 246, 240, 0.08);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: rgba(250, 246, 240, 0.88);
}
.testi__stars {
  color: var(--star);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.testi__quote {
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 24px;
  color: rgba(250, 246, 240, 0.88);
}
.testi__author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(250, 246, 240, 0.08);
  padding-top: 18px;
}
.testi__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--amber);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}
.testi__name {
  font-size: 14px;
  font-weight: 600;
  color: #FAF6F0;
}
.testi__meta {
  font-size: 12px;
  color: rgba(250, 246, 240, 0.6);
}

/* ==========================================================
   Pricing
   ========================================================== */
.pricing__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: stretch;
}
.pricing__main {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
}
.pricing__title {
  font-size: clamp(28px, 3.5vw, 36px);
  font-weight: 700;
  color: var(--dark);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.pricing__amount {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}
.pricing__amount .currency {
  font-size: 32px;
  font-weight: 600;
  color: var(--dark);
}
.pricing__amount .price {
  font-size: 72px;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.04em;
  line-height: 1;
}
.pricing__amount .unit {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-muted);
}
.pricing__sub {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
}
.pricing__btn {
  display: inline-block;
  background: var(--paypal);
  color: #003087;
  font-weight: 700;
  font-size: 17px;
  padding: 16px 32px;
  border-radius: 12px;
  text-align: center;
  width: 100%;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
  box-shadow: 0 4px 12px rgba(255, 196, 57, 0.32);
  transition: all 0.2s;
}
.pricing__btn:hover {
  background: #F5B500;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(255, 196, 57, 0.44);
}
.pricing__btn--paypal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.pricing__btn--paypal svg { width: 80px; height: auto; }
.pricing__trust {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 28px;
}
.pricing__divider {
  height: 1px;
  background: var(--border);
  margin: 28px 0;
}
.pricing__ship {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
}
.ship__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 4px;
}
.ship__label {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.pricing__side {
  background: var(--cream);
  border-radius: var(--radius-xl);
  padding: 40px;
}
.pricing__side-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 24px;
}
.box__item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.box__item:last-child { border-bottom: none; }
.box__icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  flex-shrink: 0;
}
.box__icon svg { width: 20px; height: 20px; }
.box__text {
  font-size: 15px;
  font-weight: 500;
  color: var(--dark);
}

/* ==========================================================
   FAQ
   ========================================================== */
.faq__list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq__item {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.2s;
}
.faq__item[open] { border-color: var(--amber-light); }
.faq__q {
  padding: 22px 28px;
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: var(--amber);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.faq__item[open] .faq__q::after { transform: rotate(45deg); }
.faq__a {
  padding: 0 28px 24px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ==========================================================
   Final CTA
   ========================================================== */
.cta {
  background: var(--dark);
  padding: 96px 0;
  text-align: center;
}
.cta__title {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  color: #FAF6F0;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 16px;
}
.cta__sub {
  font-size: 18px;
  color: rgba(250, 246, 240, 0.7);
  margin-bottom: 36px;
}

/* ==========================================================
   Footer
   ========================================================== */
.footer {
  background: #1a1108;
  color: rgba(250, 246, 240, 0.72);
  padding: 72px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer__brand .logo { color: #FAF6F0; margin-bottom: 16px; }
.footer__tagline {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(250, 246, 240, 0.6);
  max-width: 280px;
  margin-bottom: 20px;
}
.footer__social { display: flex; gap: 10px; }
.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(250, 246, 240, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(250, 246, 240, 0.72);
  transition: all 0.2s;
}
.footer__social a:hover { background: var(--amber); color: #fff; }
.footer__social svg { width: 16px; height: 16px; }
.footer__col-title {
  font-size: 13px;
  font-weight: 600;
  color: #FAF6F0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer__col ul { list-style: none; }
.footer__col li { margin-bottom: 10px; }
.footer__col a {
  font-size: 14px;
  color: rgba(250, 246, 240, 0.6);
  transition: color 0.2s;
}
.footer__col a:hover { color: #FAF6F0; }
.footer__bottom {
  border-top: 1px solid rgba(250, 246, 240, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(250, 246, 240, 0.5);
  flex-wrap: wrap;
  gap: 16px;
}
.footer__legal { display: flex; gap: 24px; flex-wrap: wrap; }
.footer__legal a:hover { color: #FAF6F0; }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { max-width: 480px; margin: 0 auto; }
  .features__grid, .steps__grid, .testi__grid { grid-template-columns: 1fr; }
  .custom__grid, .specs__grid { grid-template-columns: repeat(2, 1fr); }
  .models__grid { grid-template-columns: repeat(3, 1fr); }
  .pricing__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .nav { display: none; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  :root { --section-py: 64px; }
  .hero { padding: 48px 0 64px; }
  .hero__ctas { flex-direction: column; align-items: stretch; }
  .hero__ctas .btn--primary, .hero__ctas .btn--play { width: 100%; justify-content: center; }
  .custom__grid, .models__grid, .specs__grid, .pricing__ship { grid-template-columns: 1fr 1fr; }
  .pricing__main, .pricing__side { padding: 32px 24px; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .header__actions .btn--ghost { display: none; }
}