@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

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

:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-dark: #26171f;
  --c-dark2: #1a0f16;
  --c-dark3: #2e1c28;
  --c-text: #f0e6ef;
  --c-text-muted: #b89ab5;
  --c-border: rgba(255,0,128,0.18);
  --c-glass: rgba(38,23,31,0.72);
  --nav-h: 96px;
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --radius: 4px;
  --radius-lg: 12px;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body.dark-theme {
  background-color: var(--c-dark);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Aurora Background ── */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.aurora-layer {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  mix-blend-mode: screen;
  opacity: 0.45;
}

.aurora-layer.a1 {
  width: 70vw; height: 60vh;
  top: -20%; left: -15%;
  background: radial-gradient(ellipse at center, #ff0080 0%, #ff00ff 45%, transparent 70%);
  animation: auroraFloat1 12s ease-in-out infinite alternate;
}

.aurora-layer.a2 {
  width: 55vw; height: 55vh;
  top: 10%; right: -10%;
  background: radial-gradient(ellipse at center, #ff00ff 0%, #8800ff 50%, transparent 70%);
  animation: auroraFloat2 16s ease-in-out infinite alternate;
}

.aurora-layer.a3 {
  width: 60vw; height: 45vh;
  bottom: -10%; left: 20%;
  background: radial-gradient(ellipse at center, #ff0080 0%, #ff5500 40%, transparent 70%);
  animation: auroraFloat3 10s ease-in-out infinite alternate;
}

@keyframes auroraFloat1 {
  from { transform: translate(0,0) scale(1); }
  to { transform: translate(8vw, 6vh) scale(1.1); }
}
@keyframes auroraFloat2 {
  from { transform: translate(0,0) scale(1.05); }
  to { transform: translate(-6vw, 8vh) scale(0.95); }
}
@keyframes auroraFloat3 {
  from { transform: translate(0,0) scale(1); }
  to { transform: translate(-4vw, -5vh) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
  .aurora-layer { animation: none; }
}

/* ── Layout Layers ── */
header, main, footer {
  position: relative;
  z-index: 1;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(38,23,31,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
}

.header-brand-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header-search {
  flex: 1;
  max-width: 340px;
  margin-left: auto;
}

.search-form {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  overflow: hidden;
  transition: border-color var(--transition);
}

.search-form:focus-within {
  border-color: var(--c-primary);
}

.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--c-text);
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 16px;
  min-width: 0;
}

.search-input::placeholder { color: var(--c-text-muted); }

.search-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-text-muted);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
  min-height: 44px;
}

.search-btn:hover { color: var(--c-primary); }

.burger-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.burger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.burger-btn[aria-expanded="true"] .burger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger-btn[aria-expanded="true"] .burger-bar:nth-child(2) {
  opacity: 0;
}
.burger-btn[aria-expanded="true"] .burger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header-nav-row {
  border-top: 1px solid var(--c-border);
  padding: 0 24px;
}

.site-nav p {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  align-items: center;
}

.site-nav p a {
  display: inline-flex;
  align-items: center;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 14px 14px;
  min-height: 44px;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition);
  letter-spacing: 0.02em;
}

.site-nav p a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 14px; right: 14px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav p a:hover {
  color: var(--c-text);
}

.site-nav p a:hover::after {
  transform: scaleX(1);
}

/* ── Fullscreen Menu ── */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(22,10,18,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.fullscreen-menu.is-open {
  opacity: 1;
  pointer-events: all;
}

.fullscreen-menu-inner {
  text-align: center;
  width: 100%;
  max-width: 480px;
  padding: 48px 24px;
}

.menu-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-text-muted);
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition);
}

.menu-close:hover { color: var(--c-primary); }

.menu-item {
  display: block;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  padding: 14px 24px;
  letter-spacing: -0.02em;
  transition: color var(--transition), transform var(--transition);
  transform: translateY(20px);
  opacity: 0;
}

.fullscreen-menu.is-open .menu-item {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease calc(var(--i) * 0.06s), transform 0.4s ease calc(var(--i) * 0.06s), color 0.28s;
}

.menu-item:hover {
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transform: translateX(8px);
}

@media (prefers-reduced-motion: reduce) {
  .menu-item { transition: color 0.2s; transform: none; opacity: 1; }
  .fullscreen-menu.is-open .menu-item { transition: color 0.2s; }
}

/* ── Main & Wrap ── */
main {
  min-height: 60vh;
}

.wrap {
  width: 100%;
}

/* ── Hero ── */
.hero-section {
  scroll-margin-top: var(--nav-h);
}

.hero-article {
  min-height: 45vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 40px;
  width: 100%;
}

.hero-text {
  flex: 1 1 55%;
  min-width: 0;
}

.hero-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary);
  border: 1px solid var(--c-primary);
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 16px;
}

.hero-text h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 50%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1rem;
  color: var(--c-text-muted);
  margin-bottom: 28px;
  max-width: 420px;
  line-height: 1.7;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-family: var(--font);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: var(--radius);
  letter-spacing: 0.02em;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 24px rgba(255,0,128,0.35);
  min-height: 48px;
}

.cta-btn:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,0,255,0.4);
}

.hero-media {
  flex: 0 0 42%;
  display: flex;
  justify-content: center;
}

.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: visible;
}

.hero-img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.hero-placeholder {
  width: 320px;
  height: 200px;
  background: var(--c-dark3);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-border);
}

.prism-orb {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #ff0080, #ff00ff, #8800ff, #ff0080);
  filter: blur(2px);
  animation: spinOrb 4s linear infinite;
}

@keyframes spinOrb {
  to { transform: rotate(360deg) scale(1.1); }
}

@media (prefers-reduced-motion: reduce) {
  .prism-orb { animation: none; }
}

.float-badge {
  position: absolute;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 20px;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 12px rgba(255,0,128,0.4);
  white-space: nowrap;
  animation: floatBadge 3s ease-in-out infinite alternate;
}

.float-badge:first-of-type { top: -12px; right: 16px; }
.float-badge.b2 { bottom: -10px; left: 16px; animation-delay: 1.5s; }

@keyframes floatBadge {
  from { transform: translateY(0); }
  to { transform: translateY(-6px); }
}

@media (prefers-reduced-motion: reduce) {
  .float-badge { animation: none; }
}

/* ── Aside + Content Section ── */
.aside-content-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.aside-content-article {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.content-aside {
  flex: 0 0 220px;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
}

.aside-inner {
  background: rgba(38,23,31,0.6);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(8px);
}

.aside-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-primary);
  margin-bottom: 10px;
}

.aside-inner hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin-bottom: 14px;
}

.aside-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 20px;
}

.aside-nav-list a {
  display: block;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 13px;
  padding: 10px 10px;
  min-height: 40px;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  line-height: 1.4;
  display: flex;
  align-items: center;
}

.aside-nav-list a:hover {
  color: var(--c-text);
  background: rgba(255,0,128,0.1);
}

.aside-brand-note {
  border-top: 1px solid var(--c-border);
  padding-top: 14px;
}

.aside-brand-note p {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 4px;
  line-height: 1.4;
}

.aside-kw {
  font-size: 11px !important;
  color: var(--c-text-muted) !important;
  font-weight: 400 !important;
}

.main-content {
  flex: 1;
  min-width: 0;
}

/* ── page.content 内部样式 ── */
.main-content section {
  padding: 48px 0 32px;
  scroll-margin-top: var(--nav-h);
  border-bottom: 1px solid var(--c-border);
}

.main-content section:last-child {
  border-bottom: none;
}

.main-content h2 {
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  line-height: 1.25;
  background: linear-gradient(90deg, var(--c-text) 0%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-content h2 + hr,
.main-content h3 + hr {
  border: none;
  border-top: 2px solid;
  border-image: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent) 1;
  margin-bottom: 20px;
}

.main-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 24px 0 8px;
  color: var(--c-primary);
}

.main-content p {
  margin-bottom: 14px;
  color: var(--c-text);
  font-size: 16px;
  line-height: 1.72;
}

.main-content ul, .main-content ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.main-content li {
  margin-bottom: 8px;
  line-height: 1.65;
}

.main-content a {
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,0,128,0.3);
  transition: border-color var(--transition), color var(--transition);
}

.main-content a:hover {
  color: var(--c-secondary);
  border-bottom-color: var(--c-secondary);
}

.main-content strong { color: var(--c-text); font-weight: 700; }

.main-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 14px;
}

.main-content th {
  background: rgba(255,0,128,0.12);
  color: var(--c-text);
  font-weight: 700;
  padding: 10px 14px;
  text-align: left;
  border: 1px solid var(--c-border);
}

.main-content td {
  padding: 9px 14px;
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
}

.main-content blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(255,0,128,0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--c-text-muted);
}

/* ── Footer ── */
.site-footer {
  position: relative;
  z-index: 1;
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
}

.footer-brand-section {
  padding: 48px 24px 32px;
  text-align: center;
  border-bottom: 1px solid var(--c-border);
}

.footer-super-brand {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary), #ff5500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-tagline {
  color: var(--c-text-muted);
  font-size: 15px;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

.footer-links-section {
  padding: 40px 24px 28px;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-cols {
  display: flex;
  gap: 48px;
  margin-bottom: 32px;
}

.footer-col {
  flex: 1;
}

.footer-col h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-primary);
  margin-bottom: 10px;
}

.footer-col h3 + hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
  min-height: 40px;
  line-height: 1.5;
}

.footer-col a:hover {
  color: var(--c-text);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--c-border);
  padding-top: 20px;
}

.footer-copy, .footer-policy {
  font-size: 12px;
  color: var(--c-text-muted);
  line-height: 1.5;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-dark2); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--c-primary), var(--c-secondary));
  border-radius: 3px;
}

/* ── Focus styles ── */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .aside-content-article {
    flex-direction: column;
  }
  .content-aside {
    flex: none;
    width: 100%;
    position: static;
  }
  .aside-nav-list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .aside-nav-list a {
    font-size: 12px;
    padding: 8px 8px;
    min-height: 40px;
  }
  .footer-cols {
    gap: 24px;
  }
}

@media (max-width: 680px) {
  :root { --nav-h: 108px; }

  .header-brand-row {
    padding: 10px 16px;
    gap: 10px;
  }

  .header-search {
    max-width: 180px;
  }

  .header-nav-row {
    padding: 0 8px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .header-nav-row::-webkit-scrollbar { display: none; }

  .site-nav p a {
    font-size: 12px;
    padding: 14px 8px;
    min-height: 44px;
  }

  .hero-content {
    flex-direction: column;
    padding: 32px 16px 28px;
    gap: 24px;
  }

  .hero-text { flex: none; width: 100%; }
  .hero-media { flex: none; width: 100%; }
  .hero-placeholder { width: 100%; }

  .hero-sub { max-width: 100%; }

  .aside-content-section {
    padding: 0 16px 32px;
  }

  .main-content section {
    padding: 32px 0 24px;
  }

  .footer-brand-section { padding: 32px 16px 24px; }
  .footer-links-section { padding: 28px 16px 20px; }

  .footer-cols {
    flex-direction: column;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 400px) {
  .header-search { display: none; }
  .site-nav p { gap: 0; }
  .site-nav p a { font-size: 11px; padding: 14px 6px; min-height: 44px; }
}