@import url('https://fonts.googleapis.com/css2?family=Cormorant:wght@400;500;600;700&family=Montserrat:wght@300;400;500;600;700&display=swap');

/* ===== 基础重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 72px;
}

body {
  background-color: #26171f;
  color: #f0dde8;
  font-family: 'Montserrat', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* ===== Aurora 背景层 ===== */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

#aurora-canvas {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.55;
}

.mesh-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, rgba(255,0,128,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 70%, rgba(255,0,255,0.14) 0%, transparent 55%),
    radial-gradient(ellipse 50% 50% at 50% 10%, rgba(255,0,200,0.1) 0%, transparent 50%);
  mix-blend-mode: screen;
  animation: meshShift 12s ease-in-out infinite alternate;
}

@keyframes meshShift {
  0% { transform: translateX(0) translateY(0) scale(1); opacity: 1; }
  50% { transform: translateX(2%) translateY(-1%) scale(1.02); opacity: 0.85; }
  100% { transform: translateX(-1%) translateY(2%) scale(0.98); opacity: 1; }
}

/* ===== 通用层叠 ===== */
header, main, footer {
  position: relative;
  z-index: 1;
}

/* ===== 页头 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(38,23,31,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,0,128,0.2);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

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

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

.logo-text {
  font-family: 'Cormorant', serif;
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.03em;
}

/* ===== 导航：details > summary + menu > li > a ===== */
.site-nav {
  flex: 1;
}

.nav-details {
  position: relative;
}

.nav-details[open] .nav-toggle .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
.nav-details[open] .nav-toggle .hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav-details[open] .nav-toggle .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  list-style: none;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  background: transparent;
  border: none;
}

.nav-toggle::-webkit-details-marker { display: none; }

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: #ff0080;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-menu li {
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.65rem;
  min-height: 44px;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: #f0dde8;
  text-decoration: none;
  white-space: nowrap;
  border-radius: 3px;
  transition: color 0.2s, background 0.2s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 0.65rem;
  right: 0.65rem;
  height: 1px;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover {
  color: #ff0080;
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.header-contact {
  flex-shrink: 0;
  font-size: 0.72rem;
  font-family: 'Montserrat', sans-serif;
  color: rgba(240,221,232,0.5);
  letter-spacing: 0.08em;
}

/* ===== Hero ===== */
.hero-section {
  min-height: 45vh;
  display: flex;
  align-items: center;
  padding: 3rem 0 2rem;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,0,128,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,128,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-article {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 3rem;
  justify-content: space-between;
}

.hero-text {
  flex: 1;
  max-width: 640px;
  text-align: left;
}

.eyebrow-tag {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: #ff0080;
  border: 1px solid rgba(255,0,128,0.4);
  border-radius: 2px;
  padding: 0.2em 0.7em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.hero-h1 {
  font-family: 'Cormorant', serif;
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #ff80bf 40%, #ff00ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.2rem;
}

.hero-desc {
  font-size: 0.95rem;
  color: rgba(240,221,232,0.75);
  line-height: 1.8;
  margin-bottom: 2rem;
  max-width: 500px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  min-height: 48px;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #fff;
  background: linear-gradient(135deg, #ff0080, #ff00ff);
  border: none;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 20px rgba(255,0,128,0.4);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 30px rgba(255,0,255,0.5);
}

.btn-primary:hover::before {
  opacity: 1;
}

/* ===== Hero 棱镜装饰 ===== */
.hero-deco {
  flex-shrink: 0;
  position: relative;
  width: 200px;
  height: 200px;
}

.prism-block {
  position: absolute;
  border-radius: 4px;
  filter: blur(1px);
}

.prism-1 {
  width: 100px;
  height: 100px;
  top: 0;
  right: 0;
  background: linear-gradient(135deg, rgba(255,0,128,0.6), rgba(255,0,255,0.3));
  transform: rotate(15deg);
  animation: prismFloat 6s ease-in-out infinite;
}

.prism-2 {
  width: 70px;
  height: 70px;
  bottom: 20px;
  left: 10px;
  background: linear-gradient(225deg, rgba(255,0,255,0.5), rgba(255,0,128,0.2));
  transform: rotate(-20deg);
  animation: prismFloat 8s ease-in-out infinite reverse;
}

.prism-3 {
  width: 50px;
  height: 50px;
  top: 30px;
  left: 40px;
  background: linear-gradient(45deg, rgba(255,128,200,0.4), rgba(255,0,255,0.6));
  transform: rotate(35deg);
  animation: prismFloat 5s ease-in-out infinite 1s;
}

@keyframes prismFloat {
  0%, 100% { transform: rotate(15deg) translateY(0); }
  50% { transform: rotate(15deg) translateY(-12px); }
}

.prism-2 {
  animation-name: prismFloat2;
}
@keyframes prismFloat2 {
  0%, 100% { transform: rotate(-20deg) translateY(0); }
  50% { transform: rotate(-20deg) translateY(-8px); }
}

.prism-3 {
  animation-name: prismFloat3;
}
@keyframes prismFloat3 {
  0%, 100% { transform: rotate(35deg) translateY(0); }
  50% { transform: rotate(35deg) translateY(-15px); }
}

/* ===== 内容区 main > section.wrap > article > div ===== */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.content-section {
  padding: 3rem 0 4rem;
}

.content-article {
  width: 100%;
}

.content-with-aside {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 3rem;
  align-items: start;
}

/* ===== 正文内容 ===== */
.main-content {
  min-width: 0;
}

.main-content article {
  margin-bottom: 3.5rem;
  padding-top: 1rem;
  scroll-margin-top: 80px;
}

.main-content h2 {
  font-family: 'Cormorant', serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, #fff 60%, #ff80c0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-content h2 + hr,
.main-content h3 + hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, #ff0080, rgba(255,0,255,0.3), transparent);
  margin: 0.6rem 0 1.4rem;
}

.main-content h3 {
  font-family: 'Cormorant', serif;
  font-size: 1.35rem;
  font-weight: 600;
  color: #ff80bf;
  margin: 1.8rem 0 0.8rem;
  letter-spacing: 0.02em;
}

.main-content p {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(240,221,232,0.88);
  margin-bottom: 1.1rem;
}

.main-content ul,
.main-content ol {
  padding-left: 1.4rem;
  margin-bottom: 1.2rem;
  color: rgba(240,221,232,0.85);
}

.main-content li {
  margin-bottom: 0.5rem;
  line-height: 1.75;
}

.main-content a {
  color: #ff80bf;
  text-decoration: underline;
  text-decoration-color: rgba(255,0,128,0.4);
  transition: color 0.2s;
}

.main-content a:hover {
  color: #ff00ff;
}

.main-content strong {
  color: #fff;
  font-weight: 600;
}

.main-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.main-content th {
  background: rgba(255,0,128,0.15);
  color: #ff80bf;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 0.6rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid rgba(255,0,128,0.3);
}

.main-content td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: rgba(240,221,232,0.8);
}

.main-content blockquote {
  border-left: 3px solid #ff0080;
  padding: 0.8rem 1.2rem;
  margin: 1.5rem 0;
  background: rgba(255,0,128,0.06);
  border-radius: 0 4px 4px 0;
  font-style: italic;
  color: rgba(240,221,232,0.75);
}

/* 卡片风格：底部强调线 + 圆角4px */
.main-content .card,
.card {
  background: rgba(38,23,31,0.6);
  border: 1px solid rgba(255,0,128,0.15);
  border-radius: 4px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.2rem;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}

.main-content .card::after,
.card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  border-radius: 0 0 4px 4px;
}

.main-content .card:hover,
.card:hover {
  border-color: rgba(255,0,128,0.4);
  transform: translateY(-2px);
}

/* ===== 侧边栏 aside ===== */
.content-aside {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.aside-block {
  background: rgba(38,23,31,0.7);
  border: 1px solid rgba(255,0,128,0.18);
  border-radius: 4px;
  padding: 1.2rem;
  position: relative;
}

.aside-block::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  border-radius: 0 0 4px 4px;
}

.aside-title {
  font-family: 'Cormorant', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.aside-block hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, #ff0080, rgba(255,0,255,0.2), transparent);
  margin-bottom: 1rem;
}

.aside-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.aside-nav-list li {
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.aside-nav-list li:last-child {
  border-bottom: none;
}

.aside-link {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.82rem;
  font-family: 'Montserrat', sans-serif;
  color: rgba(240,221,232,0.7);
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-link:hover {
  color: #ff0080;
  padding-left: 0.4rem;
}

.aside-tip p {
  font-size: 0.82rem;
  color: rgba(240,221,232,0.65);
  line-height: 1.7;
}

/* ===== 页脚 ===== */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255,0,128,0.2);
  background: rgba(20,10,16,0.9);
  padding-top: 0;
}

.footer-brand-bar {
  text-align: center;
  padding: 2.5rem 1.5rem 1rem;
  border-bottom: 1px solid rgba(255,0,128,0.1);
}

.footer-brand-big {
  font-family: 'Cormorant', serif;
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,0,128,0.6) 40%, rgba(255,0,255,0.4) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.footer-dl {
  /* 三列 dl 并排 */
}

.footer-dl dt {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #ff0080;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.footer-dl dd {
  margin: 0 0 0.4rem;
  font-size: 0.85rem;
  color: rgba(240,221,232,0.55);
  line-height: 1.6;
}

.footer-link {
  color: rgba(240,221,232,0.55);
  text-decoration: none;
  transition: color 0.2s;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.85rem;
}

.footer-link:hover {
  color: #ff0080;
}

.footer-bottom {
  text-align: center;
  padding: 1rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  font-family: 'Montserrat', sans-serif;
  color: rgba(240,221,232,0.35);
  letter-spacing: 0.05em;
}

/* ===== 滚动揭示动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 移动端断点 ===== */
@media (max-width: 900px) {
  .content-with-aside {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .aside-block {
    flex: 1;
    min-width: 240px;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }

  .hero-deco {
    display: none;
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-details {
    position: static;
  }

  .nav-details:not([open]) .nav-menu {
    display: none;
  }

  .nav-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(30,15,24,0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,0,128,0.2);
    padding: 0.5rem 0;
    z-index: 200;
  }

  .nav-link {
    padding: 0.75rem 1.5rem;
    min-height: 48px;
    font-size: 0.85rem;
    border-radius: 0;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-section {
    min-height: auto;
    padding: 2rem 0 1.5rem;
  }

  .hero-h1 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 1rem;
  }

  .hero-article,
  .wrap {
    padding: 0 1rem;
  }

  .footer-cols {
    padding: 1.5rem 1rem;
  }

  .aside-block {
    min-width: 100%;
  }
}

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

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 辅助 ===== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

:focus-visible {
  outline: 2px solid #ff0080;
  outline-offset: 3px;
}

::selection {
  background: rgba(255,0,128,0.35);
  color: #fff;
}

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #26171f;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #ff0080, #ff00ff);
  border-radius: 3px;
}