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

/* ===== CSS 变量 ===== */
:root {
  --red: #ff0000;
  --purple: #8b00ff;
  --dark: #261717;
  --dark-2: #1a0f0f;
  --dark-3: #0e0808;
  --glass-bg: rgba(255,255,255,0.10);
  --glass-border: rgba(255,255,255,0.18);
  --glass-blur: 15px;
  --text-primary: #f5e6e6;
  --text-secondary: #c9a8a8;
  --text-muted: #8a6060;
  --font-serif: 'Cormorant Garamond', 'Libre Baskerville', Georgia, serif;
  --font-sans: 'Libre Baskerville', 'Noto Serif SC', Georgia, serif;
  --radius-card: 10px;
  --nav-height: 120px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-serif);
  background-color: var(--dark-3);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
body.dark-theme {
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(139,0,255,0.22) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(255,0,0,0.18) 0%, transparent 55%),
    linear-gradient(160deg, #1a0808 0%, #0e0808 50%, #110614 100%);
  background-attachment: fixed;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1,h2,h3,h4 { line-height: 1.25; font-family: var(--font-serif); font-weight: 700; }

/* ===== 滚动边距（固定导航补偿） ===== */
section[id] { scroll-margin-top: 130px; }

/* ===== 玻璃卡片基础 ===== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.45),
    inset 0 1px 0 rgba(255,255,255,0.12);
}

/* ===== 按钮 ===== */
.btn-cta-main, .btn-hero {
  display: inline-block;
  padding: 14px 32px;
  min-height: 48px;
  border-radius: 6px;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
}
.btn-cta-main {
  background: linear-gradient(135deg, var(--red) 0%, var(--purple) 100%);
  color: #fff;
  border: none;
  box-shadow: 0 4px 20px rgba(255,0,0,0.35);
}
.btn-cta-main:hover, .btn-cta-main:focus-visible {
  box-shadow: 0 6px 30px rgba(255,0,0,0.55), 0 0 0 2px rgba(255,255,255,0.3);
  transform: translateY(-2px);
}
.btn-hero {
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-hero:hover, .btn-hero:focus-visible {
  background: rgba(255,0,0,0.20);
  border-color: var(--red);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 页头 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(26,8,8,0.75);
  border-bottom: 1px solid rgba(139,0,255,0.25);
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
.header-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.brand-inner {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand-anchor {
  display: flex;
  align-items: center;
  gap: 10px;
  transition: opacity var(--transition);
}
.brand-anchor:hover { opacity: 0.85; }
.brand-logo { height: 36px; width: auto; }
.brand-mark { height: 36px; width: auto; }
.brand-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--red), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.04em;
}
.brand-tagline {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  display: none;
}
.header-cta-wrap { flex-shrink: 0; }

/* 导航行 */
.header-nav-row {
  padding: 6px 32px;
}
.main-nav { width: 100%; }
.nav-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  align-items: center;
}
.nav-link {
  display: inline-block;
  padding: 10px 18px;
  min-height: 40px;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-family: var(--font-serif);
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  border-radius: 4px;
  line-height: 1.4;
}
.nav-link:hover, .nav-link:focus-visible {
  color: #fff;
  background: rgba(255,0,0,0.15);
}

/* ===== 主体 ===== */
.site-main {
  margin-top: var(--nav-height);
}

/* ===== 英雄区 ===== */
.hero-section {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  grid-template-rows: 1fr;
  min-height: calc(100vh - var(--nav-height));
  align-items: center;
  gap: 40px;
  padding: 60px 48px 60px 32px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 70% at 30% 50%, rgba(139,0,255,0.15) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 70% 40%, rgba(255,0,0,0.12) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero-aside {
  grid-column: 1;
  grid-row: 1;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-self: center;
  z-index: 2;
  position: relative;
}
.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255,0,0,0.18);
  border: 1px solid rgba(255,0,0,0.35);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffaaaa;
  letter-spacing: 0.08em;
  text-align: center;
  transition: background var(--transition);
}
.hero-badge.accent {
  background: rgba(139,0,255,0.20);
  border-color: rgba(139,0,255,0.40);
  color: #cc88ff;
}
.hero-badge:hover { background: rgba(255,0,0,0.30); }
.aside-tip {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.55;
}
.hero-figure {
  grid-column: 2;
  grid-row: 1;
  z-index: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-img {
  width: 100%;
  max-width: 500px;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(139,0,255,0.30), 0 4px 20px rgba(0,0,0,0.5);
  border: 1px solid rgba(255,255,255,0.12);
}
.hero-img-placeholder {
  width: 100%;
  max-width: 460px;
  height: 340px;
  background:
    radial-gradient(ellipse 60% 60% at 50% 50%, rgba(139,0,255,0.30) 0%, transparent 70%),
    linear-gradient(135deg, rgba(255,0,0,0.20) 0%, rgba(139,0,255,0.20) 100%);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.10);
}
.hero-fig-caption {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 10px;
  letter-spacing: 0.06em;
}
.hero-text {
  grid-column: 3;
  grid-row: 1;
  text-align: right;
  z-index: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 22px;
}
.hero-h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  background: linear-gradient(135deg, #fff 0%, var(--red) 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 380px;
  line-height: 1.65;
}

/* ===== 内容区（aside + content） ===== */
.content-sections {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding: 60px 48px 80px 32px;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}
.content-aside {
  grid-column: 1;
  padding: 28px 20px;
  position: sticky;
  top: 140px;
  align-self: flex-start;
  height: fit-content;
}
.aside-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 16px;
  letter-spacing: 0.08em;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  padding-bottom: 10px;
}
.aside-title span { display: inline-block; }
.aside-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.aside-nav-list li a.aside-link {
  display: block;
  padding: 9px 12px;
  min-height: 40px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-radius: 5px;
  transition: color var(--transition), background var(--transition);
  line-height: 1.4;
}
.aside-nav-list li a.aside-link:hover,
.aside-nav-list li a.aside-link:focus-visible {
  color: var(--text-primary);
  background: rgba(255,0,0,0.12);
}
.page-content-body { grid-column: 2; min-width: 0; }

/* ===== page.content 内部样式 ===== */
.page-content-body h2 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 18px;
  margin-top: 60px;
  color: #fff;
}
.page-content-body h2:first-child { margin-top: 0; }
.page-content-body h2 span { display: inline-block; }
.page-content-body h3 {
  font-size: 1.2rem;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.page-content-body h3 span { display: inline-block; }
.page-content-body p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.page-content-body ul, .page-content-body ol {
  padding-left: 1.4em;
  margin-bottom: 14px;
}
.page-content-body li {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.page-content-body a {
  color: #ff6666;
  text-decoration: underline;
  text-decoration-color: rgba(255,100,100,0.4);
  transition: color var(--transition);
}
.page-content-body a:hover { color: var(--red); }
.page-content-body section {
  padding: 48px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  position: relative;
}
.page-content-body section:last-child { border-bottom: none; }
.page-content-body figure {
  margin: 24px 0;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.page-content-body aside {
  background: rgba(139,0,255,0.12);
  border: 1px solid rgba(139,0,255,0.25);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(14,8,8,0.92);
  border-top: 1px solid rgba(139,0,255,0.22);
}
.footer-cta-section {
  padding: 64px 32px;
  text-align: center;
}
.footer-cta-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 40px;
  background: linear-gradient(135deg, rgba(255,0,0,0.12) 0%, rgba(139,0,255,0.15) 100%);
  border: 1px solid rgba(255,255,255,0.14);
}
.footer-cta-title {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  margin-bottom: 16px;
  color: #fff;
}
.footer-cta-title span { display: inline-block; }
.footer-cta-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.65;
}
.footer-links-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding: 48px 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: 0.06em;
}
.footer-col-title span { display: inline-block; }
.footer-col-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 6px;
}
.footer-nav-list { display: flex; flex-direction: column; gap: 4px; }
.footer-link {
  display: inline-block;
  padding: 6px 0;
  min-height: 40px;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
  line-height: 1.5;
}
.footer-link:hover, .footer-link:focus-visible {
  color: var(--text-primary);
}
.footer-bottom-section {
  padding: 20px 32px;
  text-align: center;
}
.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== 动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  .hero-aside,
  .hero-figure,
  .hero-text {
    animation: fadeSlideUp 0.7s ease both;
  }
  .hero-figure { animation-delay: 0.12s; }
  .hero-text { animation-delay: 0.22s; }

  @keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  .page-content-body section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .page-content-body section.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  .aside-link, .footer-link, .nav-link { transition: color var(--transition), background var(--transition); }
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .hero-section {
    grid-template-columns: 180px 1fr 1fr;
    padding: 48px 24px;
    gap: 28px;
  }
  .content-sections {
    grid-template-columns: 190px 1fr;
    padding: 48px 24px 60px;
    gap: 32px;
  }
  .footer-links-section { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

@media (max-width: 768px) {
  :root { --nav-height: 108px; }

  .brand-tagline { display: none; }
  .header-brand-row { padding: 10px 16px 6px; }
  .header-nav-row { padding: 4px 8px; overflow-x: auto; }
  .nav-link { padding: 10px 12px; font-size: 0.82rem; }

  .hero-section {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    min-height: auto;
    padding: 32px 16px 48px;
    gap: 24px;
  }
  .hero-aside {
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero-figure { grid-column: 1; grid-row: 2; }
  .hero-text {
    grid-column: 1;
    grid-row: 3;
    align-items: center;
    text-align: center;
  }
  .hero-sub { max-width: 100%; }

  .content-sections {
    grid-template-columns: 1fr;
    padding: 32px 16px 48px;
  }
  .content-aside {
    position: static;
    order: -1;
  }
  .aside-nav-list { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .aside-nav-list li a.aside-link { padding: 8px 12px; }

  .footer-links-section {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 32px 16px;
  }
  .footer-cta-section { padding: 40px 16px; }
  .footer-cta-inner { padding: 32px 20px; }
  .footer-bottom-section { padding: 16px; }
}

@media (max-width: 480px) {
  .footer-links-section { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 1.8rem; }
  .btn-cta-main, .btn-hero { padding: 14px 22px; font-size: 0.95rem; }
  .nav-links-row { flex-wrap: nowrap; }
}