:root {
  --kanata-blue: #86cef9;
  --halo-gold: #ffd700;
  --cloud-white: #f0f8ff;
  --space-grey: #333333;
  --mulberry: #b5528f;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Noto Sans TC", "Segoe UI", sans-serif;
  color: var(--space-grey);
  background-image: radial-gradient(circle at top, #ffffff 0, var(--cloud-white) 45%, #e0f4ff 100%);
  scroll-behavior: smooth;
  text-autospace: normal;
}
img {
  max-width: 100%;
  height: auto;
}
figure{
  text-align: center;
}

a {
  color: var(--kanata-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
  text-decoration: none;
}
h1,h2{
  font-family: "Zen Maru Gothic";
}
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* header / nav */

.site-header {
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(240, 248, 255, 0.96), rgba(240, 248, 255, 0.8));
  border-bottom: 1px solid rgba(134, 206, 249, 0.3);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: "Zen Maru Gothic";
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1rem;
}

.nav-logo-mark {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--halo-gold);
  box-shadow: 0 0 0 2px rgba(134, 206, 249, 0.5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  background: radial-gradient(circle at 30% 0, #ffffff 0, #fff9e3 40%, #ffe9a3 100%);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.nav-link {
  position: relative;
  padding-bottom: 0.15rem;
  color: #345066;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 50%;
  background: linear-gradient(to right, var(--kanata-blue), var(--halo-gold));
  transition: width 0.15s ease-out;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.is-active {
  font-weight: bold;
  color: #223649;
}

.nav-link.is-active::after {
  width: 100%;
}

/* main */

.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  width: 100%;
  flex: 1;
}

/* hero */

.hero {
  padding: 1.5rem 1.25rem;
  border-radius: 1.5rem;
  background:
    linear-gradient(135deg, rgba(134, 206, 249, 0.12), rgba(181, 82, 143, 0.12)),
    rgba(255, 255, 255, 0.9);
  box-shadow:
    0 18px 40px rgba(124, 163, 196, 0.28),
    0 0 0 1px rgba(255, 255, 255, 0.8);
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.65rem;
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: linear-gradient(to right, rgba(255, 255, 255, 0.9), rgba(134, 206, 249, 0.18));
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #285a82;
}

.hero-title {
  margin: 0.6rem 0 0.4rem;
  font-size: clamp(1.8rem, 3vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: 0.03em;
  color: #1f3c57;
}

.hero-title span {
  background: linear-gradient(120deg, #86cef9, #ffd700, #b5528f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  margin: 0.25rem 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #505f6c;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  color: #3d5364;
}

.hero-meta-badge {
  padding: 0.2rem 0.65rem;
  border-radius: 50%;
  border: 1px solid rgba(134, 206, 249, 0.7);
  background: rgba(255, 255, 255, 0.9);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: bold;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #1f2733;
  background-image: linear-gradient(120deg, #ffeaa3, #ffd700, #ffc25a);
  box-shadow:
    0 12px 26px rgba(255, 204, 102, 0.6),
    0 0 0 1px rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.btn-primary:hover {
  filter: brightness(1.05);
  box-shadow:
    0 14px 30px rgba(255, 204, 102, 0.75),
    0 0 0 1px rgba(255, 255, 255, 1);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 50%;
  border: 1px solid rgba(134, 206, 249, 0.75);
  background: rgba(255, 255, 255, 0.9);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 4px 12px rgba(134, 206, 249, 0.4);
}

.section {
  margin-top: 2.5rem;
}

.section-header {
  margin-bottom: 1rem;
}

.section-kicker {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6c7c8b;
  margin-bottom: 0.25rem;
}

.section-title {
  font-size: 1.2rem;
  margin: 0;
}

.section-lead {
  margin: 0.4rem 0 0.6rem;
  font-size: 0.9rem;
  color: #4a5c6c;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
}

.feature-card {
  padding: 0.9rem 0.9rem 0.85rem;
  border-radius: 0.9rem;
  border: 1px solid rgba(134, 206, 249, 0.35);
  background: rgba(255, 255, 255, 0.95);
}

.feature-title {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
}

.feature-body {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.6;
}

/* discography table */

.table-wrapper {
  margin-top: 1rem;
  overflow-x: auto;
}

.discography-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 0.75rem;
  overflow: hidden;
}

.discography-table th,
.discography-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid rgba(200, 220, 235, 0.6);
  text-align: left;
}

.discography-table th {
  background: linear-gradient(to right, rgba(134, 206, 249, 0.35), rgba(255, 215, 0, 0.25));
  font-weight: bold;
}

.discography-table tr:last-child td {
  border-bottom: none;
}

/* footer */

.site-footer {
  border-top: 1px solid rgba(134, 206, 249, 0.3);
  background: rgba(240, 248, 255, 0.9);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1rem 1.5rem;
  font-size: 0.78rem;
  color: #4a5c6c;
  line-height: 1.7;
}

.footer-disclaimer-title {
  font-weight: bold;
  margin-bottom: 0.25rem;
}

/* utilities */

.text-muted {
  color: #6c7c8b;
}

.mt-sm {
  margin-top: 0.5rem;
}

.mt-md {
  margin-top: 1rem;
}

.mt-lg {
  margin-top: 1.5rem;
}
.text-center {
  text-align: center;
}
.border-radius-999{
  border-radius: 999px;
}

/* 2. 按鈕樣式 */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--space-grey);
  color: var(--kanata-blue);
  border-radius: 50%;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  z-index: 1000;
  opacity: 0;
  transform: translateY(1rem);
  pointer-events: none; 
  animation: appear linear forwards;
  animation-timeline: scroll();
  animation-range: 0px 500px;
}

@keyframes appear {
  to {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 1.1rem 1rem;
  }
}
#cusdis_thread {
  height: 90dvh;
  max-height: 1800px;
    iframe {
    width: 100%;
    min-height: 480px;
    height: 100%;
  }
}