/* 锦书光网 — 月满西楼主题 */

:root {
  --bg-deep: #0a0e1a;
  --bg-card: rgba(18, 24, 42, 0.72);
  --bg-card-hover: rgba(24, 32, 56, 0.85);
  --moon: #f4e4bc;
  --moon-glow: rgba(244, 228, 188, 0.25);
  --gold: #c9a962;
  --gold-light: #e8d5a3;
  --jade: #5a8f7b;
  --mist: rgba(200, 210, 230, 0.08);
  --text: #e8eaf0;
  --text-muted: #9aa3b8;
  --border: rgba(201, 169, 98, 0.2);
  --border-strong: rgba(201, 169, 98, 0.45);
  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-display: "Ma Shan Zheng", "Noto Serif SC", serif;
  --font-sans: "Noto Sans SC", system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

/* Sky background */
.sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(45, 55, 90, 0.4) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(90, 143, 123, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #060912 0%, #0d1225 40%, #121a30 100%);
  overflow: hidden;
}

.stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 15%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 80% 45%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 35% 70%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 80%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 10% 55%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 50% 90%, rgba(255,255,255,0.25) 0%, transparent 100%),
    radial-gradient(1px 1px at 75% 25%, rgba(255,255,255,0.45) 0%, transparent 100%);
  animation: twinkle 8s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.7; }
  to { opacity: 1; }
}

.cloud {
  position: absolute;
  background: var(--mist);
  border-radius: 50%;
  filter: blur(40px);
  animation: drift 60s linear infinite;
}

.cloud-1 {
  width: 320px;
  height: 80px;
  top: 12%;
  left: -10%;
  animation-duration: 80s;
}

.cloud-2 {
  width: 240px;
  height: 60px;
  top: 25%;
  right: -5%;
  animation-duration: 100s;
  animation-direction: reverse;
}

.cloud-3 {
  width: 400px;
  height: 100px;
  top: 55%;
  left: 30%;
  opacity: 0.5;
  animation-duration: 120s;
}

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(30vw); }
}

.moon {
  position: absolute;
  top: 8%;
  right: 12%;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle at 35% 35%, var(--moon) 0%, #d4c49a 60%, #a89870 100%);
  border-radius: 50%;
  box-shadow:
    0 0 60px var(--moon-glow),
    0 0 120px rgba(244, 228, 188, 0.12),
    inset -8px -8px 20px rgba(0, 0, 0, 0.15);
  animation: moonPulse 6s ease-in-out infinite;
}

.moon-glow {
  position: absolute;
  inset: -40px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--moon-glow) 0%, transparent 70%);
}

@keyframes moonPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.03); opacity: 0.95; }
}

.geese {
  position: absolute;
  top: 18%;
  left: 0;
  width: 100%;
  color: rgba(201, 169, 98, 0.35);
  pointer-events: none;
}

.goose-formation {
  position: absolute;
  width: 80px;
  height: 28px;
}

.goose-1 {
  animation: flyAcross 45s linear infinite;
  top: 0;
}

.goose-2 {
  animation: flyAcross 55s linear infinite 15s;
  top: 30px;
  opacity: 0.6;
  width: 60px;
}

@keyframes flyAcross {
  from { left: -10%; transform: translateY(0); }
  50% { transform: translateY(-8px); }
  to { left: 110%; transform: translateY(0); }
}

.pavilion {
  position: absolute;
  bottom: 8%;
  right: 8%;
  opacity: 0.15;
  pointer-events: none;
}

.pavilion-roof {
  width: 80px;
  height: 24px;
  background: linear-gradient(180deg, var(--gold) 0%, transparent 100%);
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
  margin: 0 auto;
}

.pavilion-body {
  width: 60px;
  height: 40px;
  margin: 0 auto;
  border: 1px solid var(--gold);
  border-top: none;
  background: rgba(201, 169, 98, 0.05);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  background: linear-gradient(180deg, rgba(6, 9, 18, 0.9) 0%, transparent 100%);
  backdrop-filter: blur(12px);
  transition: background var(--transition);
}

.site-header.scrolled {
  background: rgba(6, 9, 18, 0.92);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 100%);
  border-radius: 8px;
}

.logo-text {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--gold-light);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-nav {
  background: rgba(201, 169, 98, 0.12);
  color: var(--gold-light);
  border-color: var(--border);
}

.btn-nav:hover {
  background: rgba(201, 169, 98, 0.22);
  border-color: var(--border-strong);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold) 0%, #a88b45 100%);
  color: var(--bg-deep);
  box-shadow: 0 4px 20px rgba(201, 169, 98, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(201, 169, 98, 0.4);
}

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

.btn-ghost:hover {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
}

.btn-outline {
  background: transparent;
  color: var(--gold-light);
  border-color: var(--border-strong);
  width: 100%;
}

.btn-outline:hover {
  background: rgba(201, 169, 98, 0.1);
}

.btn-large {
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
}

.hero-inner {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  border: 1px solid var(--border);
  border-radius: 100px;
  background: rgba(201, 169, 98, 0.08);
  margin-bottom: 1.5rem;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.title-main {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  background: linear-gradient(180deg, var(--text) 0%, var(--gold-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
}

.title-sub {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 3vw, 1.35rem);
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.25em;
}

.hero-poem {
  margin: 2rem 0;
  padding-left: 1.2rem;
  border-left: 2px solid var(--gold);
}

.hero-poem p {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-style: italic;
  color: var(--gold-light);
  letter-spacing: 0.15em;
  line-height: 1.9;
}

.hero-poem cite {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  font-style: normal;
  color: var(--text-muted);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat-value {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--gold-light);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: 0.08em;
}

.section-header p {
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  transition: all var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  color: var(--gold-light);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Features */
.features {
  background: linear-gradient(180deg, transparent 0%, rgba(201, 169, 98, 0.03) 50%, transparent 100%);
}

.feature-list {
  display: grid;
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.feature-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  transition: border-color var(--transition);
}

.feature-item:hover {
  border-color: var(--border-strong);
}

.feature-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold);
  opacity: 0.6;
  flex-shrink: 0;
}

.feature-content h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.feature-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Nodes */
.node-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.node-region {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
}

.node-region h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--gold-light);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.node-region ul {
  list-style: none;
}

.node-region li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  padding-left: 1rem;
  position: relative;
}

.node-region li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--gold);
}

/* Subscribe */
.subscribe-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 3rem;
  background: linear-gradient(135deg, rgba(201, 169, 98, 0.08) 0%, var(--bg-card) 50%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  margin-bottom: 3rem;
  backdrop-filter: blur(20px);
}

.subscribe-poem .poem-line {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.75rem);
  color: var(--gold-light);
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.subscribe-poem .poem-sub {
  margin-top: 1rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.subscribe-form h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.subscribe-form > p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.subscribe-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.8;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.price-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  backdrop-filter: blur(12px);
  transition: all var(--transition);
}

.price-card:hover {
  border-color: var(--border-strong);
}

.price-card.featured {
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(201, 169, 98, 0.12) 0%, var(--bg-card) 100%);
  transform: scale(1.02);
}

.price-card .badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.2rem 0.8rem;
  font-size: 0.7rem;
  background: var(--gold);
  color: var(--bg-deep);
  border-radius: 100px;
  font-weight: 600;
}

.price-card h4 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--gold-light);
}

.price {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
}

.price-card ul {
  list-style: none;
  margin-bottom: 1.5rem;
  text-align: left;
}

.price-card li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 0.4rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.price-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--jade);
  font-size: 0.75rem;
}

.price-card .btn {
  width: 100%;
}

/* Footer */
.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  background: rgba(6, 9, 18, 0.6);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand strong {
  font-family: var(--font-serif);
  display: block;
  letter-spacing: 0.1em;
}

.footer-brand p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}

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

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}

.footer-poem {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-serif);
  font-style: italic;
  color: rgba(201, 169, 98, 0.5);
  letter-spacing: 0.15em;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.75rem 1.5rem;
  background: rgba(18, 24, 42, 0.95);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--gold-light);
  font-size: 0.9rem;
  z-index: 200;
  opacity: 0;
  transition: all 0.4s ease;
  backdrop-filter: blur(12px);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links,
  .btn-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: rgba(6, 9, 18, 0.98);
    border-bottom: 1px solid var(--border);
    gap: 1rem;
  }

  .nav.open .btn-nav {
    display: inline-flex;
    margin: 0 1.5rem 1rem;
  }

  .moon {
    width: 70px;
    height: 70px;
    right: 8%;
    top: 6%;
  }

  .pavilion {
    display: none;
  }

  .subscribe-panel {
    grid-template-columns: 1fr;
    padding: 2rem;
  }

  .price-card.featured {
    transform: none;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-brand {
    flex-direction: column;
  }
}

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