@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=IBM+Plex+Mono:wght@400;500&family=Noto+Sans+SC:wght@400;500&display=swap');

:root {
  --bg: #EDE6D8;
  --panel: #F6F1E6;
  --ink: #2A2620;
  --dim: #97917F;
  --line: rgba(42,38,32,0.13);
  --acc: #C9A05C;
  --font-title: 'Fraunces', serif;
  --font-data: 'IBM Plex Mono', monospace;
  --font-body: 'Noto Sans SC', sans-serif;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.9;
  overflow-x: hidden;
  position: relative;
  /* hide default cursor if desired, but user can still click. "全站自定义光标环跟随" */
  cursor: none;
}

a, summary, .btn, details, .glass-card {
  cursor: none; /* override default pointers so our custom cursor ring shows nicely */
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  line-height: 1.2;
  color: var(--ink);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 10;
}

/* Header */
header {
  padding: 30px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  animation: fadeUp 0.8s cubic-bezier(0.22,1,0.36,1) forwards;
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-menu a {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  transition: color 0.3s cubic-bezier(0.22,1,0.36,1);
}

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

.logo a {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink);
}

/* Button */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--panel);
  background: var(--ink);
  border-radius: 4px;
  transition: all 0.3s cubic-bezier(0.22,1,0.36,1);
  border: 1px solid var(--ink);
  text-align: center;
}

.btn:hover {
  background: var(--acc);
  color: var(--ink);
  border-color: var(--acc);
}

.header-btn {
  background: transparent;
  color: var(--ink);
}

.header-btn:hover {
  background: var(--acc);
  color: var(--panel);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 120px 0 100px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  transition: letter-spacing 0.5s cubic-bezier(0.22,1,0.36,1);
}

.hero h1:hover {
  letter-spacing: 0.05em;
}

.hero p {
  font-size: 1.1rem;
  color: var(--dim);
  max-width: 640px;
  margin: 0 auto 40px;
}

.hero p strong {
  color: var(--ink);
  font-weight: 500;
}

/* Sections */
section {
  padding: 80px 0;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.22,1,0.36,1), transform 0.8s cubic-bezier(0.22,1,0.36,1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 60px;
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

/* Panel Card */
.glass-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 40px 30px;
  transition: all 0.3s cubic-bezier(0.22,1,0.36,1);
}

.glass-card:hover {
  border-color: rgba(201,160,92,0.5); /* var(--acc) with opacity */
  transform: translateY(-4px);
}

.glass-card h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  transition: color 0.3s cubic-bezier(0.22,1,0.36,1);
}

.glass-card:hover h3 {
  color: var(--acc);
}

.glass-card p {
  color: var(--dim);
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: center;
}

.price-card {
  text-align: center;
  position: relative;
}

.price-card.popular {
  border-color: var(--acc);
  transform: scale(1.02);
}

.price-card.popular::before {
  content: 'BEST VALUE';
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--acc);
  color: var(--ink);
  padding: 4px 12px;
  border-radius: 4px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
}

.price-amount {
  font-family: var(--font-title);
  font-size: 2.5rem;
  margin: 20px 0;
  color: var(--ink);
}

.price-amount span {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--dim);
}

.price-features {
  list-style: none;
  margin-bottom: 30px;
  text-align: left;
}

.price-features li {
  margin-bottom: 10px;
  color: var(--dim);
  font-size: 0.95rem;
}

/* FAQ Details */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  margin-bottom: 15px;
  padding: 20px;
  transition: border-color 0.3s cubic-bezier(0.22,1,0.36,1);
}

details:hover {
  border-color: rgba(201,160,92,0.5);
}

summary {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--ink);
  outline: none;
  list-style: none;
  position: relative;
  padding-right: 20px;
  transition: color 0.3s cubic-bezier(0.22,1,0.36,1);
}

details:hover summary {
  color: var(--acc);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--font-data);
  color: var(--dim);
}

details[open] summary::after {
  content: '-';
}

details p {
  margin-top: 15px;
  color: var(--dim);
}

/* Support Tags */
.support-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.support-tag {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 10px 20px;
  border-radius: 4px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.3s cubic-bezier(0.22,1,0.36,1);
}

.support-tag:hover {
  color: var(--acc);
  border-color: rgba(201,160,92,0.5);
}

/* Reviews */
.review-content {
  font-style: italic;
  margin-bottom: 20px;
}

.review-author {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
}

/* Page specific content (About, Terms, etc.) */
.page-header {
  text-align: center;
  padding: 80px 0 40px;
  animation: fadeUp 0.8s cubic-bezier(0.22,1,0.36,1) forwards;
}

.page-content {
  max-width: 800px;
  margin: 0 auto 100px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 50px;
  animation: fadeUp 0.8s cubic-bezier(0.22,1,0.36,1) forwards;
}

.page-content h2 {
  font-family: var(--font-title);
  color: var(--ink);
  margin: 30px 0 15px;
}

.page-content p, .page-content li {
  color: var(--dim);
  margin-bottom: 15px;
}

.page-content ul {
  padding-left: 20px;
}

/* Footer */
footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  margin-top: 50px;
}

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

.footer-links {
  display: flex;
  gap: 30px;
}

.footer-links a {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  transition: color 0.3s cubic-bezier(0.22,1,0.36,1);
}

.footer-links a:hover {
  color: var(--acc);
}

.copyright {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

/* Corner Overlay */
.corner-label {
  position: fixed;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-transform: uppercase;
  z-index: 1;
  pointer-events: none;
}
.label-tl { top: 20px; left: 20px; }
.label-bl { bottom: 20px; left: 20px; }
.label-tr { top: 20px; right: 20px; text-align: right; }

#click-counter {
  display: block;
  margin-top: 4px;
  color: var(--acc);
}

/* Custom Cursor Ring */
#cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  border: 1px solid var(--acc);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.2s cubic-bezier(0.22,1,0.36,1), height 0.2s cubic-bezier(0.22,1,0.36,1), background-color 0.2s cubic-bezier(0.22,1,0.36,1);
}
#cursor-ring.active {
  width: 40px;
  height: 40px;
  background-color: rgba(201,160,92,0.1);
}

/* Canvas Background */
#otter-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0; /* behind content but above nothing */
  pointer-events: none;
}

/* Basic Keyframes */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Media Queries */
@media (max-width: 900px) {
  .hero h1 { font-size: 2.8rem; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; gap: 40px; }
  .price-card.popular { transform: scale(1); }
}

@media (max-width: 600px) {
  header { flex-wrap: wrap; justify-content: space-between; }
  .nav-menu { order: 3; width: 100%; justify-content: center; margin-top: 15px; gap: 15px; flex-wrap: wrap; }
  .logo { order: 1; }
  .header-btn { order: 2; padding: 10px 15px; }
  .hero h1 { font-size: 2.2rem; }
  .grid-3 { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; gap: 20px; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
  .btn { width: 100%; padding: 14px 20px; }
  .corner-label { display: none; } /* hide corner labels on small screens to avoid clutter */
}

/* Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 20px;
  z-index: 9999;
  transition: top 0.3s;
  text-decoration: none;
  font-weight: bold;
}
.skip-link:focus {
  top: 0;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}