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

/* ===== 基础变量 ===== */
:root {
  --c-red: #ff0000;
  --c-pink: #ff1493;
  --c-dark: #261717;
  --c-dark2: #1a0e0e;
  --c-dark3: #321f1f;
  --c-dark4: #3d2626;
  --c-text: #f5e8e8;
  --c-text-dim: #c4a0a0;
  --c-text-muted: #8a5c5c;
  --c-border: rgba(255,20,147,0.18);
  --c-border-bright: rgba(255,0,0,0.35);
  --c-glass: rgba(38,23,23,0.75);
  --c-glass2: rgba(50,31,31,0.6);
  --gradient-aurora: linear-gradient(135deg, #ff0000 0%, #ff1493 50%, #ff6b9d 100%);
  --gradient-hero: radial-gradient(ellipse at 30% 60%, rgba(255,0,0,0.4) 0%, transparent 60%),
                   radial-gradient(ellipse at 80% 20%, rgba(255,20,147,0.35) 0%, transparent 55%),
                   radial-gradient(ellipse at 60% 90%, rgba(255,107,157,0.25) 0%, transparent 50%);
  --font-main: 'DM Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-card: 0;
  --nav-h: 68px;
  --max-prose: 760px;
  --max-site: 1280px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--c-dark);
  color: var(--c-text);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===== Aurora 背景网格 ===== */
.aurora-mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 50%, rgba(255,0,0,0.22) 0%, transparent 65%),
    radial-gradient(ellipse 60% 80% at 85% 20%, rgba(255,20,147,0.20) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 50% 100%, rgba(255,107,157,0.15) 0%, transparent 55%);
  background-size: 200% 200%;
  animation: auroraDrift 10s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}
.aurora-mesh--dim {
  opacity: 0.5;
}

@keyframes auroraDrift {
  0%   { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

/* Aurora Orbs */
.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 10s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}
.orb-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(255,0,0,0.38) 0%, transparent 70%);
  top: -120px; left: -80px;
  animation-duration: 9s;
}
.orb-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(255,20,147,0.32) 0%, transparent 70%);
  top: 20%; right: -100px;
  animation-duration: 11s;
  animation-delay: -3s;
}
.orb-3 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(255,107,157,0.28) 0%, transparent 70%);
  bottom: -80px; left: 40%;
  animation-duration: 8s;
  animation-delay: -5s;
}
.orb--sm { width: 280px; height: 280px; filter: blur(60px); }
.orb--sm.orb-1 { top: -60px; left: -40px; }
.orb--sm.orb-2 { top: 10%; right: -60px; }
.orb--sm.orb-3 { bottom: -40px; left: 50%; }

@keyframes orbFloat {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, 20px) scale(1.08); }
}

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

/* ===== 站点包裹 ===== */
.site-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(26, 14, 14, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
  overflow: hidden;
}
.site-header--compact { }

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-right { justify-content: flex-end; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text-dim);
  white-space: nowrap;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
  min-height: 44px;
}
.nav-link:hover { color: var(--c-text); background: rgba(255,20,147,0.12); }
.nav-icon { font-size: 10px; opacity: 0.6; flex-shrink: 0; }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 0 16px;
  text-decoration: none;
}
.brand-logo-mark { height: 32px; width: auto; }
.brand-name {
  font-size: 18px;
  font-weight: 700;
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  background: var(--gradient-aurora);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 4px;
  min-height: 44px;
  white-space: nowrap;
  transition: opacity var(--transition), transform var(--transition);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}
.nav-cta:hover { opacity: 0.88; transform: translateY(-1px); }

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50%       { background-position: 100% 50%; }
}

/* ===== Hero（首页） ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-dark2);
  margin-top: calc(-1 * var(--nav-h));
  padding-top: var(--nav-h);
}

.hero-aurora {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}
.hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(1.3);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 120px 48px 160px;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--c-border-bright);
  border-radius: 2px;
  font-size: 12px;
  font-weight: 500;
  color: var(--c-pink);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
  background: rgba(255,20,147,0.08);
}

.hero-h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 660px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,180,200,0.9) 60%, var(--c-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--c-text-dim);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-curve {
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 80px;
  z-index: 3;
  background: var(--c-dark);
  clip-path: ellipse(55% 100% at 50% 100%);
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 13px 28px;
  background: var(--gradient-aurora);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  min-height: 48px;
  transition: transform var(--transition), opacity var(--transition);
  letter-spacing: 0.01em;
}
.btn-primary:hover { transform: translateY(-2px); opacity: 0.9; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 13px 28px;
  border: 1px solid var(--c-border-bright);
  color: var(--c-text);
  font-size: 15px;
  font-weight: 500;
  border-radius: 4px;
  min-height: 48px;
  transition: border-color var(--transition), background var(--transition);
}
.btn-ghost:hover { border-color: var(--c-pink); background: rgba(255,20,147,0.08); }

/* ===== 正文区域 ===== */
.page-body {
  flex: 1;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  padding: 48px 24px;
}

.main-content { width: 100%; }

/* ===== 正文排版 ===== */
.prose {
  max-width: var(--max-prose);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}
.prose h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: #fff;
  letter-spacing: -0.02em;
  border-left: 3px solid var(--c-pink);
  padding-left: 14px;
}
.prose h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--c-text);
}
.prose h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--c-text-dim);
}
.prose p { margin-bottom: 1.2rem; }
.prose ul, .prose ol {
  padding-left: 1.4rem;
  margin-bottom: 1.2rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4rem; line-height: 1.7; }
.prose strong { color: #fff; font-weight: 600; }
.prose em { color: var(--c-pink); font-style: normal; font-weight: 500; }
.prose a {
  color: var(--c-pink);
  text-decoration: underline;
  text-decoration-color: rgba(255,20,147,0.4);
  transition: text-decoration-color var(--transition);
}
.prose a:hover { text-decoration-color: var(--c-pink); }
.prose blockquote {
  border-left: 3px solid var(--c-red);
  padding: 12px 20px;
  margin: 1.5rem 0;
  background: rgba(255,0,0,0.06);
  color: var(--c-text-dim);
  font-style: italic;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 14px;
}
.prose th {
  background: rgba(255,20,147,0.15);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  border: 1px solid var(--c-border);
}
.prose td {
  padding: 9px 14px;
  border: 1px solid var(--c-border);
  color: var(--c-text-dim);
}
.prose tr:nth-child(even) td { background: rgba(255,255,255,0.03); }
.prose code {
  background: rgba(255,20,147,0.12);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--c-pink);
}
.prose pre {
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  padding: 16px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.prose pre code { background: none; padding: 0; color: var(--c-text-dim); }
.prose hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 2.5rem 0;
}
.prose time { color: var(--c-text-muted); font-size: 0.875em; }
.prose img { border: 1px solid var(--c-border); margin: 1.5rem 0; }

/* ===== 指南专区 ===== */
.guide-section {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 64px 0;
}
.section-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 0 24px;
}
.section-header { margin-bottom: 40px; }
.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: var(--gradient-aurora);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.section-sub { color: var(--c-text-muted); font-size: 15px; }

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
}
.cards-grid--narrow {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.guide-card {
  background: var(--c-dark);
  display: flex;
  flex-direction: column;
  transition: background var(--transition);
}
.guide-card:hover { background: var(--c-dark3); }

.card-img-wrap { overflow: hidden; aspect-ratio: 16/9; }
.card-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.guide-card:hover .card-img { transform: scale(1.04); }

.card-body {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card-date {
  font-size: 12px;
  color: var(--c-text-muted);
  letter-spacing: 0.05em;
}
.card-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}
.card-title a { color: var(--c-text); transition: color var(--transition); }
.card-title a:hover { color: var(--c-pink); }
.card-desc {
  font-size: 13px;
  color: var(--c-text-dim);
  line-height: 1.6;
  flex: 1;
}
.card-more {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-red);
  letter-spacing: 0.04em;
  margin-top: 4px;
  transition: color var(--transition);
}
.card-more:hover { color: var(--c-pink); }

/* ===== CTA条带 ===== */
.cta-strip {
  background: linear-gradient(135deg, rgba(255,0,0,0.12) 0%, rgba(255,20,147,0.12) 100%);
  border-top: 1px solid var(--c-border-bright);
  border-bottom: 1px solid var(--c-border-bright);
  padding: 40px 24px;
}
.cta-strip-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-strip-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--c-text);
}

/* ===== 指南页布局 ===== */
.guide-hero-strip {
  position: relative;
  overflow: hidden;
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: stretch;
  min-height: 260px;
}
.guide-hero-text {
  position: relative;
  z-index: 1;
  flex: 1;
  padding: 48px 48px 48px 48px;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.guide-hero-img-wrap {
  width: 340px;
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.guide-hero-img { width: 100%; height: 100%; object-fit: cover; opacity: 0.7; }

.guide-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-red);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.guide-h1 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 12px;
}
.guide-date {
  font-size: 12px;
  color: var(--c-text-muted);
  letter-spacing: 0.05em;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.bc-link {
  font-size: 12px;
  color: var(--c-text-muted);
  transition: color var(--transition);
}
.bc-link:hover { color: var(--c-pink); }
.bc-sep { font-size: 12px; color: var(--c-text-muted); opacity: 0.5; }
.bc-current { font-size: 12px; color: var(--c-text-dim); }

/* ===== 指南双栏 ===== */
.guide-layout {
  flex: 1;
  display: flex;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  gap: 0;
  align-items: flex-start;
}

.guide-sidebar {
  width: 240px;
  flex-shrink: 0;
  padding: 40px 0 40px 0;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  max-height: calc(100vh - var(--nav-h) - 32px);
  overflow-y: auto;
  padding-right: 24px;
  border-right: 1px solid var(--c-border);
}

.guide-main-wrap {
  flex: 1;
  min-width: 0;
  padding: 40px 0 40px 40px;
}

.sibling-nav {
  margin-bottom: 28px;
}
.sibling-label, .sidebar-toc-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 10px;
}
.sibling-link, .sidebar-nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--c-text-dim);
  border-left: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  border-radius: 0 3px 3px 0;
  min-height: 40px;
  line-height: 1.4;
  display: flex;
  align-items: center;
}
.sibling-link:hover, .sidebar-nav-link:hover {
  color: var(--c-text);
  border-left-color: var(--c-pink);
  background: rgba(255,20,147,0.06);
}
.sibling-link.is-active, .sidebar-nav-link.is-active {
  color: var(--c-pink);
  border-left-color: var(--c-red);
  background: rgba(255,0,0,0.07);
  font-weight: 600;
}
.sidebar-toc { margin-top: 0; }

.related-aside { margin-bottom: 28px; }
.aside-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 10px;
}
.related-link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 12px;
  margin-bottom: 4px;
  border: 1px solid var(--c-border);
  border-radius: 2px;
  transition: border-color var(--transition), background var(--transition);
}
.related-link:hover { border-color: var(--c-pink); background: rgba(255,20,147,0.05); }
.related-title { font-size: 13px; color: var(--c-text); font-weight: 500; line-height: 1.3; }
.related-desc { font-size: 12px; color: var(--c-text-muted); line-height: 1.4; }

/* ===== 子页列表 ===== */
.child-pages {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--c-border);
}
.child-pages-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: #fff;
  letter-spacing: -0.02em;
}

/* ===== FAQ 页 ===== */
.faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 72px 24px 64px;
}
.faq-hero-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.faq-h1 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 12px 0 16px;
  max-width: 640px;
}
.faq-desc {
  font-size: 16px;
  color: var(--c-text-dim);
  max-width: 540px;
  line-height: 1.75;
  margin-bottom: 12px;
}

.faq-layout {
  flex: 1;
  display: flex;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  gap: 0;
  align-items: flex-start;
}
.faq-sidebar {
  width: 220px;
  flex-shrink: 0;
  padding: 40px 24px 40px 0;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  max-height: calc(100vh - var(--nav-h) - 32px);
  overflow-y: auto;
  border-right: 1px solid var(--c-border);
}
.faq-main {
  flex: 1;
  min-width: 0;
  padding: 40px 0 40px 40px;
}
.faq-prose { max-width: var(--max-prose); }
.faq-guides {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--c-border);
}

/* ===== About 页 ===== */
.about-header {
  position: relative;
  overflow: hidden;
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 72px 24px 64px;
}
.about-header-inner {
  max-width: var(--max-site);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.about-h1 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 12px 0 16px;
}
.about-sub {
  font-size: 16px;
  color: var(--c-text-dim);
  max-width: 520px;
  line-height: 1.75;
}

.about-pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--c-border);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
.pillar-card {
  background: var(--c-dark);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px 24px;
  border-top: 3px solid transparent;
  transition: background var(--transition), border-color var(--transition);
  min-height: 44px;
}
.pillar-card:hover { background: var(--c-dark3); border-top-color: var(--c-red); }
.pillar-label {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.01em;
}
.pillar-desc { font-size: 13px; color: var(--c-text-muted); line-height: 1.5; }

.about-layout {
  flex: 1;
  display: flex;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  gap: 0;
  align-items: flex-start;
}
.about-layout .page-body { flex: 1; padding: 40px 40px 40px 0; }
.about-prose { max-width: var(--max-prose); }
.about-sidebar {
  width: 220px;
  flex-shrink: 0;
  padding: 40px 0 40px 32px;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  max-height: calc(100vh - var(--nav-h) - 32px);
  overflow-y: auto;
  border-left: 1px solid var(--c-border);
}

/* ===== Privacy 页 ===== */
.privacy-header {
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 64px 24px 48px;
}
.privacy-header-inner {
  max-width: var(--max-site);
  margin: 0 auto;
}
.privacy-h1 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 12px 0 12px;
}
.privacy-updated { font-size: 13px; color: var(--c-text-muted); }
.privacy-updated time { color: var(--c-text-dim); }

.privacy-layout {
  flex: 1;
  display: flex;
  max-width: var(--max-site);
  margin: 0 auto;
  width: 100%;
  padding: 0 24px;
  gap: 0;
  align-items: flex-start;
}
.privacy-layout .page-body { flex: 1; padding: 40px 40px 40px 0; }
.privacy-prose { max-width: var(--max-prose); }
.privacy-sidebar {
  width: 200px;
  flex-shrink: 0;
  padding: 40px 0 40px 28px;
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  max-height: calc(100vh - var(--nav-h) - 32px);
  overflow-y: auto;
  border-left: 1px solid var(--c-border);
}

/* ===== 首页正文 ===== */
.home-prose { margin: 0 auto; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  margin-top: auto;
}
.footer-top {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 56px 24px 32px;
  border-bottom: 1px solid var(--c-border);
}
.footer-brand-block { }
.footer-brand-mega {
  display: block;
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, rgba(255,0,0,0.35) 0%, rgba(255,20,147,0.35) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-tagline { font-size: 14px; color: var(--c-text-muted); max-width: 400px; line-height: 1.6; }

.footer-main {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 40px 24px 32px;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.footer-dl { }
.footer-dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: 14px;
}
.footer-dd { margin-bottom: 8px; }
.footer-dd a {
  font-size: 14px;
  color: var(--c-text-dim);
  transition: color var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  line-height: 1.4;
}
.footer-dd a:hover { color: var(--c-pink); }

.footer-bottom {
  max-width: var(--max-site);
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid var(--c-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copy { font-size: 13px; color: var(--c-text-muted); }
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  font-size: 13px;
  color: var(--c-text-muted);
  transition: color var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-links a:hover { color: var(--c-pink); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .about-pillars { grid-template-columns: repeat(2, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .guide-hero-img-wrap { width: 240px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  .main-nav { padding: 0 16px; }
  .nav-left { display: none; }
  .nav-right { gap: 0; }
  .nav-link { display: none; }
  .nav-cta { padding: 8px 14px; font-size: 12px; min-height: 40px; }
  .brand-name { font-size: 15px; }

  .hero-content { padding: 80px 24px 120px; }
  .hero-h1 { font-size: 2rem; }
  .hero-desc { font-size: 15px; }

  .guide-layout, .faq-layout, .about-layout, .privacy-layout {
    flex-direction: column;
    padding: 0 16px;
  }
  .guide-sidebar, .faq-sidebar, .about-sidebar, .privacy-sidebar {
    width: 100%;
    position: static;
    max-height: none;
    border-right: none;
    border-left: none;
    border-bottom: 1px solid var(--c-border);
    padding: 24px 0;
    overflow: visible;
  }
  .guide-main-wrap, .faq-main { padding: 24px 0; }
  .about-layout .page-body, .privacy-layout .page-body { padding: 24px 0; }

  .guide-hero-strip { flex-direction: column; }
  .guide-hero-img-wrap { width: 100%; height: 180px; }
  .guide-hero-text { padding: 32px 24px; }

  .about-pillars { grid-template-columns: 1fr 1fr; }
  .footer-nav { grid-template-columns: 1fr 1fr; gap: 20px; }

  .cta-strip-inner { flex-direction: column; align-items: flex-start; }

  .page-body { padding: 32px 16px; }
  .cards-grid { grid-template-columns: 1fr; }
  .footer-brand-mega { font-size: 3.5rem; }
  .footer-main { padding: 28px 16px 20px; }
  .footer-top { padding: 32px 16px 24px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .about-pillars { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-badge { font-size: 11px; }
  .guide-hero-text { padding: 24px 16px; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--c-dark2); }
::-webkit-scrollbar-thumb { background: var(--c-dark4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-pink); }

/* ===== 焦点可访问性 ===== */
:focus-visible {
  outline: 2px solid var(--c-pink);
  outline-offset: 3px;
}

/* ===== 选中文字 ===== */
::selection { background: rgba(255,20,147,0.3); color: #fff; }