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

/* ===== 变量 ===== */
:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-dark: #26171f;
  --c-dark2: #1a0f16;
  --c-dark3: #3a2030;
  --c-glass: rgba(255, 255, 255, 0.06);
  --c-glass-border: rgba(255, 255, 255, 0.12);
  --c-glass-hover: rgba(255, 255, 255, 0.10);
  --c-text: rgba(255, 255, 255, 0.92);
  --c-text-muted: rgba(255, 255, 255, 0.55);
  --c-text-faint: rgba(255, 255, 255, 0.30);
  --c-accent-glow: rgba(255, 0, 128, 0.35);
  --r-card: 18px;
  --r-sm: 8px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-w: 1200px;
  --header-h: 110px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--c-dark2);
  color: var(--c-text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== Aurora 背景 ===== */
.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: 0.55;
  animation: aurora-drift 18s ease-in-out infinite alternate;
}
.aurora-1 {
  width: 80vw; height: 60vw;
  background: radial-gradient(ellipse, #ff0080 0%, transparent 70%);
  top: -20%; left: -20%;
  animation-duration: 20s;
}
.aurora-2 {
  width: 70vw; height: 55vw;
  background: radial-gradient(ellipse, #ff00ff 0%, transparent 65%);
  top: 10%; right: -25%;
  animation-duration: 25s;
  animation-delay: -8s;
}
.aurora-3 {
  width: 50vw; height: 40vw;
  background: radial-gradient(ellipse, rgba(255,0,128,0.6) 0%, rgba(255,0,255,0.3) 40%, transparent 70%);
  bottom: -10%; left: 30%;
  animation-duration: 30s;
  animation-delay: -15s;
}
@keyframes aurora-drift {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(4vw, 3vh) scale(1.08); }
  66%  { transform: translate(-3vw, 5vh) scale(0.95); }
  100% { transform: translate(2vw, -4vh) scale(1.05); }
}

/* 所有内容在 aurora-bg 上层 */
.announce-bar, .site-header, .fullscreen-menu, main, .site-footer {
  position: relative;
  z-index: 1;
}

/* ===== 公告条 ===== */
.announce-bar {
  background: linear-gradient(90deg, rgba(255,0,128,0.22), rgba(255,0,255,0.18), rgba(255,0,128,0.22));
  border-bottom: 1px solid rgba(255,0,255,0.2);
  text-align: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.75);
}

/* ===== Header ===== */
.site-header {
  background: rgba(26, 15, 22, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 600;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}
.brand-tagline {
  font-size: 0.78rem;
  color: var(--c-text-muted);
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* 汉堡按钮 */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border-radius: 8px;
  transition: background 0.2s;
  min-height: 44px;
  justify-content: center;
}
.hamburger:hover { background: var(--c-glass); }
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 导航行 */
.nav-row {
  padding: 0 32px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-row::-webkit-scrollbar { display: none; }
.main-nav p {
  display: flex;
  gap: 0;
  flex-wrap: nowrap;
  white-space: nowrap;
}
.main-nav p a {
  display: inline-block;
  padding: 12px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-muted);
  letter-spacing: 0.01em;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  min-height: 44px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
}
.main-nav p a:hover,
.main-nav p a[aria-current="page"] {
  color: var(--c-text);
  border-bottom-color: var(--c-primary);
}

/* ===== 全屏菜单 ===== */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(26, 10, 20, 0.97);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.fullscreen-menu.is-open {
  opacity: 1;
  pointer-events: auto;
}
.menu-close {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 1.5rem;
  color: var(--c-text-muted);
  padding: 10px 14px;
  min-height: 44px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.menu-close:hover { color: var(--c-text); background: var(--c-glass); }
.menu-nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}
.menu-nav ul li {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  transition-delay: calc(var(--i, 0) * 0.06s);
}
.fullscreen-menu.is-open .menu-nav ul li {
  opacity: 1;
  transform: translateY(0);
}
.menu-nav ul li a {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--c-text-muted);
  border-radius: 12px;
  transition: color 0.2s, background 0.2s;
  min-height: 44px;
  line-height: 1.2;
}
.menu-nav ul li a:hover {
  color: var(--c-primary);
  background: rgba(255,0,128,0.08);
}

/* ===== 玻璃卡片 ===== */
.glass-card {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--r-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 28px;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}
.glass-card:hover {
  background: var(--c-glass-hover);
  border-color: rgba(255,0,255,0.25);
  transform: translateY(-2px);
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  min-height: 48px;
  background: linear-gradient(135deg, #ff0080, #ff00ff);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 12px;
  letter-spacing: 0.02em;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 24px rgba(255,0,128,0.35);
}
.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(255,0,128,0.5);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  min-height: 48px;
  border: 1px solid rgba(255,0,255,0.4);
  color: var(--c-text);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 12px;
  letter-spacing: 0.02em;
  transition: background 0.2s, border-color 0.2s;
}
.btn-ghost:hover {
  background: rgba(255,0,255,0.1);
  border-color: rgba(255,0,255,0.7);
}

/* ===== Hero - 首页 ===== */
.hero-section {
  min-height: 45vh;
  display: flex;
  align-items: center;
  padding: 60px 32px 48px;
  position: relative;
  overflow: hidden;
}
.dot-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,0,255,0.18) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
}
.hero-text {
  max-width: 680px;
  text-align: right;
}
.hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 16px;
}
.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, #ff99cc 50%, #ff00ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
}
.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* ===== Hero - 内页 ===== */
.page-hero {
  padding: 48px 32px 36px;
  border-bottom: 1px solid var(--c-glass-border);
  background: linear-gradient(180deg, rgba(255,0,128,0.05) 0%, transparent 100%);
}
.page-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: right;
}
.page-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 0%, #ffaadd 60%, #ff00ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.meta-dates {
  display: flex;
  gap: 20px;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-top: 10px;
}
.pub-date, .mod-date {
  font-size: 0.78rem;
  color: var(--c-text-muted);
  letter-spacing: 0.03em;
}

/* ===== 主体布局 ===== */
.content-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 32px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

/* figure/aside 交错 */
.content-figure {
  min-width: 0;
  display: block;
  margin: 0;
}
.content-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ===== Prose ===== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
}
.prose h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2em 0 0.75em;
  color: #fff;
  letter-spacing: -0.01em;
}
.prose h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.6em 0 0.6em;
  color: rgba(255,255,255,0.9);
}
.prose p { margin-bottom: 1.2em; }
.prose ul, .prose ol {
  padding-left: 1.4em;
  margin-bottom: 1.2em;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.5em; }
.prose strong { color: #fff; font-weight: 600; }
.prose em { color: var(--c-secondary); }
.prose a {
  color: var(--c-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--c-secondary); }
.prose blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(255,0,128,0.06);
  border-radius: 0 8px 8px 0;
  color: var(--c-text-muted);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}
.prose th, .prose td {
  padding: 10px 14px;
  border: 1px solid var(--c-glass-border);
  text-align: left;
}
.prose th {
  background: rgba(255,0,128,0.1);
  font-weight: 600;
}
.prose code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}
.prose pre {
  background: rgba(0,0,0,0.4);
  padding: 20px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.5em 0;
}
.prose time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-top: 0.5em;
}

/* ===== 侧边栏 ===== */
.aside-panel {
  padding: 22px 22px;
}
.aside-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,0,128,0.2);
}
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.aside-links li a {
  display: block;
  padding: 8px 10px;
  font-size: 0.84rem;
  color: var(--c-text-muted);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  line-height: 1.4;
}
.aside-links li a:hover,
.aside-links li a.active {
  color: var(--c-text);
  background: rgba(255,0,128,0.1);
}
.aside-panel p {
  font-size: 0.84rem;
  color: var(--c-text-muted);
  line-height: 1.65;
}
.sibling-nav {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--r-card);
  padding: 20px 22px;
}
.sibling-nav h3 {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-secondary);
  margin-bottom: 12px;
}
.sibling-nav ul li a {
  display: block;
  padding: 7px 10px;
  font-size: 0.82rem;
  color: var(--c-text-muted);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.sibling-nav ul li a:hover {
  color: var(--c-text);
  background: rgba(255,0,255,0.08);
}

/* ===== 卡片网格 ===== */
.cards-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px 72px;
}
.section-heading {
  font-size: 1.2rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.card-grid .glass-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}
.card-grid .glass-card h3 a {
  color: var(--c-text);
  transition: color 0.2s;
}
.card-grid .glass-card h3 a:hover { color: var(--c-primary); }
.card-grid .glass-card p {
  font-size: 0.84rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}
.card-date {
  display: block;
  font-size: 0.76rem;
  color: var(--c-text-faint);
  letter-spacing: 0.03em;
}

/* ===== 子页列表 ===== */
.child-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px 64px;
}
.child-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.child-list .glass-card h3 {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.child-list .glass-card h3 a {
  color: var(--c-text);
  transition: color 0.2s;
}
.child-list .glass-card h3 a:hover { color: var(--c-secondary); }
.child-list .glass-card p {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}
.child-list .glass-card time {
  display: block;
  font-size: 0.74rem;
  color: var(--c-text-faint);
  margin-top: 10px;
}

/* ===== FAQ 特化 ===== */
.faq-intro {
  margin-bottom: 28px;
}
.faq-intro p {
  font-size: 0.95rem;
  color: var(--c-text-muted);
  line-height: 1.7;
}
.faq-tip p {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  line-height: 1.65;
}

/* ===== 联系表单 ===== */
.contact-form-wrap {
  margin-top: 36px;
}
.form-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: #fff;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-muted);
  letter-spacing: 0.02em;
}
.form-group input,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-glass-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.9rem;
  font-family: var(--font);
  color: var(--c-text);
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  min-height: 44px;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--c-text-faint);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(255,0,128,0.5);
  background: rgba(255,255,255,0.06);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(26, 10, 20, 0.9);
  border-top: 1px solid var(--c-glass-border);
  margin-top: 40px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 32px 40px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
}
.footer-brand {
  font-size: 1.05rem;
  font-weight: 600;
  background: linear-gradient(90deg, #ff0080, #ff00ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}
.footer-about {
  font-size: 0.84rem;
  color: var(--c-text-muted);
  line-height: 1.65;
}
.footer-col h3 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-text-faint);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  transition: color 0.2s;
  display: inline-block;
  min-height: 28px;
  line-height: 1.6;
}
.footer-col ul li a:hover { color: var(--c-primary); }
.footer-bar {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-size: 0.78rem;
  color: var(--c-text-faint);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.78rem;
  color: var(--c-text-faint);
  transition: color 0.2s;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-links a:hover { color: var(--c-text-muted); }

/* ===== Reveal 动画 ===== */
.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: calc(var(--i, 0) * 0.08s);
}
.reveal-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal-item, .aurora-layer, .fullscreen-menu, .menu-nav ul li {
    transition: none !important;
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .fullscreen-menu { opacity: 0; }
  .fullscreen-menu.is-open { opacity: 1; }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .content-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .content-aside {
    order: -1;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer-inner .footer-col:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .brand-row { padding: 12px 16px; }
  .brand-tagline { display: none; }
  .nav-row { padding: 0 16px; }
  .main-nav p a { padding: 10px 10px; font-size: 0.78rem; }
  .hero-section { padding: 40px 16px 36px; min-height: 45vh; }
  .hero-h1 { font-size: 1.8rem; }
  .hero-desc { font-size: 0.9rem; }
  .hero-cta { flex-direction: column; align-items: flex-end; }
  .page-hero { padding: 36px 16px 28px; }
  .page-hero h1 { font-size: 1.5rem; }
  .content-section { padding: 36px 16px; }
  .cards-section { padding: 0 16px 48px; }
  .child-section { padding: 0 16px 48px; }
  .card-grid { grid-template-columns: 1fr; }
  .child-list { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; padding: 36px 16px 24px; gap: 24px; }
  .footer-bar { padding: 14px 16px; flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 12px; }
  .announce-bar { font-size: 0.72rem; padding: 6px 12px; }
  .glass-card { padding: 20px; }
}