/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

:root {
  --brand: #E63946;
  --brand-dim: #c22d39;
  --brand-glow: rgba(230, 57, 70, 0.15);
  --bg: #0d1117;
  --card: #161b22;
  --card-elevated: #1c2230;
  --border: #30363d;
  --border-light: rgba(48, 54, 61, 0.6);
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-faint: #484f58;
  --wa-green: #00a884;
  --wa-outgoing: #005c4b;
  --wa-incoming: #1f2c34;
  --wa-bg: #0b141a;
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.2vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.375rem, 1.1rem + 1.2vw, 2rem);
  --text-2xl: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang HK", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  font-size: var(--text-base);
  color: var(--text);
  background-color: var(--bg);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
h1, h2, h3, h4 { line-height: 1.2; text-wrap: balance; }
p { text-wrap: pretty; }

::selection { background: rgba(230, 57, 70, 0.3); color: var(--text); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: var(--space-5);
}

section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: var(--space-3) 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background: var(--brand);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.nav-cta:hover { background: var(--brand-dim); transform: translateY(-1px); }

/* ===== HERO ===== */
.hero {
  padding-top: clamp(7rem, 12vw, 10rem);
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.hero-content { position: relative; z-index: 1; }

.hero h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.hero h1 span { color: var(--brand); }

.hero-subtitle {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--brand);
  color: #fff;
  font-size: var(--text-base);
  font-weight: 700;
  border-radius: var(--radius-lg);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 24px rgba(230, 57, 70, 0.25);
  min-height: 48px;
}
.cta-primary:hover {
  background: var(--brand-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(230, 57, 70, 0.35);
}
.cta-primary:active { transform: translateY(0); }

.hero-meta {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-faint);
}

.hero-meta strong { color: var(--text-muted); }

/* ===== WHATSAPP CHAT MOCKUP ===== */
.wa-phone {
  background: var(--wa-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.06);
  max-width: 340px;
  margin: 0 auto;
}

.wa-header {
  background: #1f2c34;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.wa-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.wa-avatar svg { width: 20px; height: 20px; }

.wa-header-info { flex: 1; }
.wa-header-name { font-size: var(--text-sm); font-weight: 600; }
.wa-header-status { font-size: var(--text-xs); color: var(--wa-green); }

.wa-chat {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 260px;
}

.wa-msg {
  max-width: 82%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: 1.5;
  position: relative;
}

.wa-msg-out {
  align-self: flex-end;
  background: var(--wa-outgoing);
  border-bottom-right-radius: var(--space-1);
}

.wa-msg-in {
  align-self: flex-start;
  background: var(--wa-incoming);
  border-bottom-left-radius: var(--space-1);
}

.wa-msg-time {
  font-size: 0.625rem;
  color: rgba(255,255,255,0.4);
  text-align: right;
  margin-top: var(--space-1);
}

.wa-msg-in .wa-msg-time { color: rgba(255,255,255,0.35); }

/* ===== SECTION HEADERS ===== */
.section-label {
  font-size: var(--text-xs);
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: var(--text-base);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: var(--space-10);
}

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition), transform var(--transition);
}
.feature-card:hover {
  border-color: rgba(230, 57, 70, 0.3);
  transform: translateY(-2px);
}

.feature-emoji {
  font-size: 1.75rem;
  margin-bottom: var(--space-3);
  line-height: 1;
}

.feature-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.feature-chat {
  background: var(--wa-bg);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.fc-msg {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  line-height: 1.5;
  max-width: 88%;
}

.fc-out {
  align-self: flex-end;
  background: var(--wa-outgoing);
  border-bottom-right-radius: var(--space-1);
}

.fc-in {
  align-self: flex-start;
  background: var(--wa-incoming);
  border-bottom-left-radius: var(--space-1);
}

/* ===== STEPS ===== */
.steps-section { background: var(--card); }

.steps-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  counter-reset: step;
}

@media (min-width: 640px) {
  .steps-row { grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
}

.step {
  text-align: left;
  position: relative;
}

.step-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--brand-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.step-num {
  font-size: var(--text-xs);
  color: var(--brand);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.step h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

/* Connector line between steps on desktop */
@media (min-width: 640px) {
  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 28px;
    left: calc(56px + var(--space-4));
    right: calc(-1 * var(--space-4));
    height: 2px;
    background: linear-gradient(90deg, var(--border), transparent);
  }
}

/* ===== TESTIMONIALS ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .testimonials-grid { grid-template-columns: repeat(3, 1fr); }
}

.testimonial-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.testimonial-stars {
  color: #f0b429;
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-muted);
  flex-shrink: 0;
}

.testimonial-name {
  font-size: var(--text-sm);
  font-weight: 600;
}

.testimonial-role {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ===== PRICING ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}

.pricing-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.popular {
  border-color: var(--brand);
  box-shadow: 0 0 40px rgba(230, 57, 70, 0.1);
}

.pricing-badge {
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-4);
  border-radius: 9999px;
  white-space: nowrap;
}

.pricing-tier {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.pricing-price {
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--space-1);
}

.pricing-price span {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-desc {
  font-size: var(--text-sm);
  color: var(--text-faint);
  margin-bottom: var(--space-4);
}

.pricing-detail {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.pricing-cta {
  display: block;
  text-align: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
  margin-top: auto;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-card:not(.popular) .pricing-cta {
  background: rgba(230, 57, 70, 0.12);
  color: var(--brand);
}
.pricing-card:not(.popular) .pricing-cta:hover {
  background: rgba(230, 57, 70, 0.2);
}

.pricing-card.popular .pricing-cta {
  background: var(--brand);
  color: #fff;
}
.pricing-card.popular .pricing-cta:hover {
  background: var(--brand-dim);
  transform: translateY(-1px);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 720px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) 0;
  font-size: var(--text-base);
  font-weight: 600;
  text-align: left;
  gap: var(--space-4);
  min-height: 44px;
}

.faq-q::after {
  content: '+';
  font-size: var(--text-lg);
  color: var(--text-faint);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.open .faq-q::after {
  content: '−';
  color: var(--brand);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease, padding 300ms ease;
}

.faq-item.open .faq-a {
  max-height: 200px;
  padding-bottom: var(--space-5);
}

.faq-a p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== FINAL CTA ===== */
.final-cta {
  text-align: center;
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.final-cta h2 {
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--space-6);
  max-width: 480px;
  margin-inline: auto;
}

.final-meta {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-faint);
}

/* ===== FOOTER ===== */
.site-footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-faint);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--text-faint);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text-muted); }

/* ===== STICKY BOTTOM BAR ===== */
.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-light);
  padding: var(--space-3) var(--space-5);
  transform: translateY(100%);
  transition: transform 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

.sticky-bar.visible { transform: translateY(0); }

.sticky-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.sticky-text {
  font-size: var(--text-sm);
  color: var(--text-muted);
  display: none;
}

@media (min-width: 640px) {
  .sticky-text { display: block; }
}

.sticky-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--brand);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: background var(--transition);
  min-height: 44px;
  width: 100%;
  justify-content: center;
}

@media (min-width: 640px) {
  .sticky-cta { width: auto; }
}

.sticky-cta:hover { background: var(--brand-dim); }

/* ===== WHATSAPP FLOAT ===== */
.wa-float {
  position: fixed;
  bottom: calc(var(--space-8) + 60px);
  right: var(--space-5);
  z-index: 95;
  width: 52px;
  height: 52px;
  background: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}

.wa-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.4);
}

.wa-float svg { width: 28px; height: 28px; fill: #fff; }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1), transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }

/* ===== PULSE DOT ===== */
.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #25d366;
  border-radius: 50%;
  margin-right: var(--space-2);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Adjust bottom padding for sticky bar */
body { padding-bottom: 72px; }