@import url('https://fonts.googleapis.com/css2?family=Noto+Naskh+Arabic:wght@400;500;600;700&family=Noto+Sans+Arabic:wght@300;400;500;700&display=swap');

/* ─── 变量 ─── */
:root {
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-dark: #1c1726;
  --c-dark2: #251e33;
  --c-dark3: #332648;
  --c-light: #f3eeff;
  --c-white: #ffffff;
  --c-text: #f0e8ff;
  --c-muted: #b89fd8;
  --c-border: rgba(101, 20, 255, 0.4);
  --nav-w: 260px;
  --gap: 48px;
  --radius: 0;
  --font-main: 'Noto Naskh Arabic', 'Noto Sans Arabic', Georgia, serif;
  --font-ui: 'Noto Sans Arabic', system-ui, sans-serif;
  --trans: 220ms cubic-bezier(.25,.8,.25,1);
}

/* ─── 重置 ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 17px; line-height: 1.65; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--c-dark);
  color: var(--c-text);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-white); }
img { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
h1,h2,h3,h4 { font-family: var(--font-ui); font-weight: 700; line-height: 1.2; }

/* ─── 布局框架 ─── */
.page-wrap {
  display: flex;
  min-height: 100vh;
}

/* ─── 侧边导航 ─── */
.sidenav {
  position: fixed;
  top: 0; left: 0;
  width: var(--nav-w);
  height: 100vh;
  background: var(--c-dark2);
  border-right: 3px solid var(--c-primary);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidenav-brand {
  padding: 28px 24px 20px;
  border-bottom: 2px solid var(--c-border);
}

.brand-link {
  display: block;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.3;
  letter-spacing: 0.02em;
}
.brand-link:hover { color: var(--c-accent); }

/* details/summary 导航 */
.nav-group {
  flex: 1;
  padding: 16px 0;
}

.nav-summary {
  display: block;
  padding: 10px 24px;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-muted);
  cursor: pointer;
  user-select: none;
  list-style: none;
  min-height: 40px;
  display: flex;
  align-items: center;
}
.nav-summary::-webkit-details-marker { display: none; }
.nav-summary::after {
  content: '▾';
  margin-left: auto;
  transition: transform var(--trans);
}
details[open] .nav-summary::after { transform: rotate(-180deg); }

.nav-menu {
  padding: 4px 0;
}
.nav-menu li a {
  display: block;
  padding: 10px 24px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--c-text);
  border-left: 3px solid transparent;
  transition: background var(--trans), border-color var(--trans), color var(--trans);
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.3;
}
.nav-menu li a:hover,
.nav-menu li a[aria-current="page"] {
  background: rgba(101,20,255,0.18);
  border-left-color: var(--c-accent);
  color: var(--c-white);
}

.sidenav-contact {
  padding: 20px 24px;
  border-top: 2px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.contact-label {
  font-size: 0.75rem;
  color: var(--c-muted);
  letter-spacing: 0.08em;
}
.contact-link {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  background: var(--c-primary);
  color: var(--c-white);
  font-weight: 600;
  font-size: 0.9rem;
  transition: background var(--trans);
}
.contact-link:hover { background: var(--c-accent); color: var(--c-white); }

/* ─── 主内容区 ─── */
.main-wrap {
  margin-left: var(--nav-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--c-dark);
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(101,20,255,0.12) 0px,
      rgba(101,20,255,0.12) 1px,
      transparent 1px,
      transparent 48px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(191,0,255,0.08) 0px,
      rgba(191,0,255,0.08) 1px,
      transparent 1px,
      transparent 48px
    );
  animation: patternMove 20s linear infinite;
}

@keyframes patternMove {
  0% { background-position: 0 0, 0 0; }
  100% { background-position: 96px 96px, -96px 96px; }
}

.hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(28,23,38,0.85) 0%, rgba(101,20,255,0.35) 50%, rgba(191,0,255,0.25) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 40px;
  max-width: 800px;
}

.hero-eyebrow {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 20px;
  text-shadow: 0 2px 24px rgba(191,0,255,0.4);
  line-height: 1.15;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--c-text);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-badges {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── 徽章 ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.badge-alt {
  background: var(--c-accent);
}
.badge-lg {
  font-size: 0.9rem;
  padding: 8px 18px;
}
.float-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border: 2px solid var(--c-accent);
  color: var(--c-accent);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  animation: floatBadge 3s ease-in-out infinite;
}
.float-badge:nth-child(2) { animation-delay: 0.6s; }
.float-badge:nth-child(3) { animation-delay: 1.2s; }

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* ─── 按钮 ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1rem;
  min-height: 48px;
  transition: background var(--trans), transform var(--trans);
}
.btn-primary:hover {
  background: var(--c-accent);
  color: var(--c-white);
  transform: translateY(-2px);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 12px 26px;
  border: 2px solid var(--c-primary);
  color: var(--c-primary);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1rem;
  min-height: 48px;
  transition: background var(--trans), color var(--trans), border-color var(--trans);
}
.btn-outline:hover {
  background: var(--c-primary);
  color: var(--c-white);
}

/* ─── 装饰色块 ─── */
.section-deco {
  position: absolute;
  top: 0; right: 0;
  width: 120px;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.deco-block {
  flex: 1;
}
.deco-block--a { background: rgba(101,20,255,0.18); }
.deco-block--b { background: rgba(191,0,255,0.12); }
.deco-block--c { background: rgba(101,20,255,0.10); }

/* ─── 文章区段 ─── */
.content-section,
.article-section,
.about-section,
.privacy-section {
  position: relative;
  display: flex;
  gap: var(--gap);
  padding: var(--gap) 56px var(--gap) 56px;
  align-items: flex-start;
}

.section-inner,
.article-body,
.about-body,
.privacy-body {
  flex: 1;
  min-width: 0;
  max-width: 720px;
}

/* ─── 侧边栏 ─── */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 24px;
}

.sidebar-block {
  background: var(--c-dark2);
  border-left: 4px solid var(--c-primary);
  padding: 20px;
}
.sidebar-block--alt {
  border-left-color: var(--c-accent);
}
.sidebar-block--highlight {
  background: rgba(101,20,255,0.15);
  border-left-color: var(--c-accent);
}

.sidebar-title {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  margin-bottom: 12px;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-links li a {
  display: block;
  padding: 7px 0;
  font-size: 0.9rem;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
  transition: color var(--trans), padding-left var(--trans);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.sidebar-links li a:hover {
  color: var(--c-accent);
  padding-left: 6px;
}

/* ─── Section 标题 ─── */
.section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
}
h2 + hr, h3 + hr {
  border: none;
  border-top: 3px solid var(--c-primary);
  margin-bottom: 32px;
}
hr {
  border: none;
  border-top: 2px solid var(--c-border);
  margin: 20px 0;
}

/* ─── 文章区 ─── */
.articles-section,
.related-section,
.privacy-extra-section,
.about-nav-section {
  display: flex;
  gap: var(--gap);
  padding: var(--gap) 56px;
  background: var(--c-dark2);
  align-items: flex-start;
}

.articles-aside,
.related-aside {
  width: 200px;
  flex-shrink: 0;
}
.aside-tip {
  background: var(--c-dark3);
  border-top: 4px solid var(--c-accent);
  padding: 20px;
}
.aside-icon {
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-white);
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}
.aside-tip p {
  font-size: 0.9rem;
  color: var(--c-muted);
  line-height: 1.6;
}

.articles-main,
.related-main,
.about-nav-main,
.privacy-extra-main {
  flex: 1;
  min-width: 0;
}

/* ─── 卡片网格 ─── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.card-grid--sm {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  background: var(--c-dark3);
  border-top: 4px solid var(--c-primary);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--trans), transform var(--trans);
}
.card:hover {
  border-top-color: var(--c-accent);
  transform: translateY(-4px);
}
.card--sm {
  padding: 18px;
}

.card-badge {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-primary);
}

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
}
.card h3 a {
  color: var(--c-white);
  transition: color var(--trans);
}
.card h3 a:hover { color: var(--c-accent); }

.card p {
  font-size: 0.88rem;
  color: var(--c-muted);
  line-height: 1.6;
}

.card-date {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--c-muted);
  margin-top: auto;
}
.card-date time { color: var(--c-muted); }

/* ─── 文章 Hero ─── */
.article-hero,
.about-hero,
.privacy-hero {
  position: relative;
  padding: 80px 56px 60px;
  background: var(--c-dark2);
  border-bottom: 3px solid var(--c-primary);
  overflow: hidden;
}

.article-hero-mask,
.about-hero-mask,
.privacy-hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(101,20,255,0.25) 0%, rgba(191,0,255,0.15) 100%);
  pointer-events: none;
}

.about-hero-pattern {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(101,20,255,0.07) 0px,
      rgba(101,20,255,0.07) 1px,
      transparent 1px,
      transparent 48px
    );
  pointer-events: none;
}

.article-hero-content,
.about-hero-content,
.privacy-hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.article-eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-h1,
.about-h1,
.privacy-h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.2;
  margin-bottom: 16px;
}

.article-date {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--c-muted);
}
.article-mod-wrap { margin-top: 8px; }
.article-mod {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--c-muted);
}

/* ─── 正文 prose ─── */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}
.prose h2 {
  font-size: 1.5rem;
  margin: 2em 0 0.5em;
  color: var(--c-white);
}
.prose h3 {
  font-size: 1.2rem;
  margin: 1.6em 0 0.4em;
  color: var(--c-white);
}
.prose p { margin-bottom: 1.1em; }
.prose ul, .prose ol {
  padding-left: 1.4em;
  margin-bottom: 1.1em;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4em; }
.prose a { color: var(--c-accent); border-bottom: 1px solid rgba(191,0,255,0.35); }
.prose a:hover { color: var(--c-white); border-bottom-color: var(--c-white); }
.prose strong { color: var(--c-white); font-weight: 700; }
.prose blockquote {
  border-left: 4px solid var(--c-primary);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(101,20,255,0.1);
  color: var(--c-muted);
}
.prose code {
  background: var(--c-dark3);
  padding: 2px 6px;
  font-size: 0.9em;
}
.prose pre {
  background: var(--c-dark3);
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 1.1em;
}
.prose time { color: var(--c-muted); font-style: italic; }
.prose hr {
  border: none;
  border-top: 2px solid var(--c-border);
  margin: 2em 0;
}
.prose figure { margin: 1.5em 0; }
.prose figcaption { font-size: 0.85rem; color: var(--c-muted); margin-top: 8px; }

/* ─── 关于页导航列表 ─── */
.about-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.about-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--c-dark3);
  color: var(--c-text);
  font-size: 0.95rem;
  border-left: 3px solid transparent;
  min-height: 48px;
  transition: background var(--trans), border-color var(--trans), color var(--trans);
}
.about-nav-item:hover {
  background: rgba(101,20,255,0.18);
  border-left-color: var(--c-accent);
  color: var(--c-white);
}
.about-nav-title { font-weight: 500; }
.about-nav-arrow { color: var(--c-primary); font-size: 1rem; }

/* ─── 关于页装饰 ─── */
.about-deco {
  position: absolute;
  top: 0; right: 0;
  width: 80px;
  height: 100%;
  display: flex;
  flex-direction: column;
  pointer-events: none;
  overflow: hidden;
}

/* ─── 隐私页 ─── */
.privacy-note {
  font-size: 1rem;
  color: var(--c-muted);
  line-height: 1.8;
}
.privacy-note a { color: var(--c-accent); }

/* ─── 页脚 ─── */
.site-footer {
  background: var(--c-dark);
  border-top: 3px solid var(--c-primary);
  margin-top: auto;
}

.footer-brand-bar {
  padding: 36px 56px 24px;
  border-bottom: 1px solid var(--c-border);
}
.footer-brand-text {
  font-family: var(--font-ui);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  color: rgba(255,255,255,0.08);
  letter-spacing: 0.04em;
  user-select: none;
  display: block;
}

.footer-cols {
  display: flex;
  gap: var(--gap);
  padding: 32px 56px;
  border-bottom: 1px solid var(--c-border);
}

.footer-dl {
  flex: 1;
  min-width: 0;
}
.footer-dl dt {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-muted);
  margin-bottom: 12px;
}
.footer-dl dd {
  margin-bottom: 6px;
}
.footer-dl dd a {
  font-size: 0.9rem;
  color: var(--c-text);
  transition: color var(--trans);
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}
.footer-dl dd a:hover { color: var(--c-accent); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 56px;
}
.footer-copy {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--c-muted);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--c-muted);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color var(--trans);
}
.footer-links a:hover { color: var(--c-white); }

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── 移动端适配 ─── */
@media (max-width: 900px) {
  :root { --nav-w: 0px; }

  .sidenav {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 3px solid var(--c-primary);
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }

  .sidenav-brand {
    padding: 16px 20px;
    border-bottom: none;
    flex: 1;
  }

  .nav-group {
    width: 100%;
    padding: 0;
  }

  .nav-summary {
    padding: 12px 20px;
    font-size: 0.85rem;
  }

  .nav-menu li a {
    padding: 10px 20px;
  }

  .sidenav-contact {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-top: 1px solid var(--c-border);
    width: 100%;
  }

  .main-wrap {
    margin-left: 0;
  }

  .hero-content {
    padding: 40px 20px;
  }
  .hero-h1 { font-size: 2rem; }

  .content-section,
  .article-section,
  .about-section,
  .privacy-section {
    flex-direction: column;
    padding: 32px 20px;
    gap: 32px;
  }

  .section-deco,
  .about-deco {
    display: none;
  }

  .sidebar {
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .sidebar-block { flex: 1; min-width: 220px; }

  .articles-section,
  .related-section,
  .privacy-extra-section,
  .about-nav-section {
    flex-direction: column;
    padding: 32px 20px;
    gap: 24px;
  }

  .articles-aside,
  .related-aside {
    width: 100%;
  }

  .article-hero,
  .about-hero,
  .privacy-hero {
    padding: 48px 20px 36px;
  }

  .footer-brand-bar { padding: 24px 20px 16px; }
  .footer-cols {
    flex-direction: column;
    gap: 24px;
    padding: 24px 20px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    padding: 16px 20px;
    text-align: center;
  }
  .footer-links { justify-content: center; }

  .card-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  html { font-size: 16px; }
  .hero-h1 { font-size: 1.6rem; }
  .article-h1, .about-h1, .privacy-h1 { font-size: 1.4rem; }
  .footer-brand-text { font-size: 1.4rem; }
  .sidebar { flex-direction: column; }
  .sidebar-block { min-width: 0; }
}

/* ─── prefers-reduced-motion ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .float-badge { animation: none; }
  .hero-bg-pattern { animation: none; }
}