@import url('https://fonts.googleapis.com/css2?family=Lexend+Mega:wght@100..900&family=Public+Sans:wght@100..900&display=swap');

/* ===== CSS 变量 ===== */
:root {
  --clr-primary: #eb879c;
  --clr-secondary: #ffb6c1;
  --clr-dark: #26171a;
  --clr-dark-mid: #3a2028;
  --clr-dark-light: #4e2d37;
  --clr-pink-pale: #fff0f3;
  --clr-pink-soft: #fde8ed;
  --clr-text-on-dark: #f9eef1;
  --clr-text-body: #2e1520;
  --clr-text-muted: #7a4a55;
  --clr-border: rgba(235, 135, 156, 0.25);
  --clr-shadow-color: rgba(38, 23, 26, 0.18);
  --font-head: 'Lexend Mega', 'Public Sans', system-ui, sans-serif;
  --font-body: 'Public Sans', system-ui, sans-serif;
  --nav-width: 220px;
  --radius-card: 18px;
  --radius-pill: 999px;
  --shadow-soft: 0 2px 8px rgba(235,135,156,0.12), 0 6px 24px rgba(38,23,26,0.10);
  --shadow-card: 0 4px 16px rgba(235,135,156,0.15), 0 2px 6px rgba(38,23,26,0.08);
  --shadow-hover: 0 8px 32px rgba(235,135,156,0.25), 0 4px 12px rgba(38,23,26,0.12);
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 17px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--clr-pink-pale);
  color: var(--clr-text-body);
  line-height: 1.7;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-dark); }
a:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 3px;
  border-radius: 4px;
}
ul { list-style: none; }

/* ===== 布局骨架 ===== */
.layout-home,
.layout-guide,
.layout-feature,
.layout-faq,
.layout-about,
.layout-privacy,
.layout-default {
  display: flex;
  min-height: 100vh;
}

/* ===== 左侧固定导航 ===== */
.site-nav-aside {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--clr-dark);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  z-index: 100;
  overflow-y: auto;
  box-shadow: 4px 0 20px rgba(38,23,26,0.3);
}

.nav-brand {
  margin-bottom: 2rem;
  text-align: center;
}

.brand-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition), box-shadow var(--transition);
}
.brand-icon-link:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

.logo-text-mark {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--clr-dark);
  letter-spacing: -0.02em;
}

.site-logo-mark {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

/* aside > nav > ul > li > a 结构 */
.site-nav-aside nav {
  flex: 1;
}

.site-nav-aside nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav-aside nav ul li a {
  display: block;
  padding: 0.6rem 0.9rem;
  color: var(--clr-text-on-dark);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 10px;
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.35;
  transition: background var(--transition), color var(--transition);
}

.site-nav-aside nav ul li a:hover,
.site-nav-aside nav ul li a[aria-current="page"] {
  background: rgba(235, 135, 156, 0.18);
  color: var(--clr-secondary);
}

.site-nav-aside nav ul li a[aria-current="page"] {
  background: rgba(235, 135, 156, 0.28);
  font-weight: 700;
}

.nav-cta {
  margin-top: 1.5rem;
  text-align: center;
}

.cta-pill-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--clr-primary), #e05a78);
  color: #fff !important;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-pill);
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(235,135,156,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.03em;
}
.cta-pill-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(235,135,156,0.5);
  color: #fff !important;
}

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

/* ===== Hero（首页）===== */
.hero-wrap {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(38,23,26,0.88) 0%,
    rgba(38,23,26,0.70) 50%,
    rgba(235,135,156,0.55) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 4rem 2rem 5rem;
  max-width: 780px;
  margin: 0 auto;
}

.hero-eyebrow {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--clr-secondary);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  color: #fff;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1rem;
  color: var(--clr-text-on-dark);
  opacity: 0.88;
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), #e05a78);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-pill);
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 4px 18px rgba(235,135,156,0.45);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.02em;
}
.hero-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(235,135,156,0.55);
  color: #fff;
}

.hero-btn-secondary {
  background: rgba(255,255,255,0.12);
  color: var(--clr-secondary);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-pill);
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  border: 1.5px solid rgba(255,182,193,0.4);
  backdrop-filter: blur(6px);
  transition: background var(--transition), color var(--transition);
}
.hero-btn-secondary:hover {
  background: rgba(255,182,193,0.2);
  color: #fff;
}

.hero-slant {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--clr-pink-pale);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  z-index: 3;
}

/* ===== 内页 Hero ===== */
.inner-hero-wrap {
  position: relative;
  min-height: 30vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--clr-dark);
}

.inner-hero-media {
  position: absolute;
  inset: 0;
}

.inner-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.inner-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(38,23,26,0.92) 0%,
    rgba(38,23,26,0.75) 60%,
    rgba(235,135,156,0.4) 100%
  );
}

.feature-overlay {
  background: linear-gradient(
    135deg,
    rgba(38,23,26,0.90) 0%,
    rgba(78,45,55,0.80) 50%,
    rgba(235,135,156,0.45) 100%
  );
}

.faq-overlay,
.privacy-overlay,
.about-overlay {
  background: linear-gradient(
    150deg,
    rgba(38,23,26,0.95) 0%,
    rgba(58,32,40,0.85) 60%,
    rgba(235,135,156,0.35) 100%
  );
}

.inner-hero-content {
  position: relative;
  z-index: 2;
  padding: 2rem 2.5rem 3.5rem;
  max-width: 900px;
}

.breadcrumb-link {
  display: inline-block;
  color: var(--clr-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  opacity: 0.85;
  transition: opacity var(--transition);
}
.breadcrumb-link:hover { opacity: 1; color: #fff; }

.inner-eyebrow {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--clr-primary);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.inner-h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.6rem);
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.inner-date {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--clr-secondary);
  opacity: 0.8;
}

.inner-hero-slant {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 50px;
  background: var(--clr-pink-pale);
  clip-path: polygon(0 100%, 100% 30%, 100% 100%);
  z-index: 3;
}

/* ===== 内容区布局：aside在左，figure在右 ===== */
.content-section {
  display: flex;
  gap: 2rem;
  padding: 3rem 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  align-items: flex-start;
}

.full-figure {
  padding: 2rem 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* 侧边栏（内容左侧）*/
.content-sidebar {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: sticky;
  top: 1.5rem;
}

.sidebar-inner {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 1.25rem 1rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--clr-border);
}

.sidebar-label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--clr-primary);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav-list a {
  display: block;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  font-size: 0.84rem;
  color: var(--clr-text-body);
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.35;
  transition: background var(--transition), color var(--transition);
}
.sidebar-nav-list a:hover,
.sidebar-nav-list a[aria-current="page"] {
  background: var(--clr-pink-soft);
  color: var(--clr-primary);
}

.sidebar-action-link {
  display: block;
  padding: 0.55rem 0.6rem;
  font-size: 0.84rem;
  color: var(--clr-primary);
  font-weight: 600;
  min-height: 40px;
  display: flex;
  align-items: center;
  border-radius: 8px;
  transition: background var(--transition);
}
.sidebar-action-link:hover {
  background: var(--clr-pink-soft);
}

.sidebar-cta-block { margin-top: 0; }

.about-brand-block {
  background: linear-gradient(135deg, var(--clr-dark), var(--clr-dark-mid));
}
.sidebar-brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  color: var(--clr-secondary);
  margin-bottom: 0.4rem;
}
.sidebar-brand-desc {
  font-size: 0.8rem;
  color: var(--clr-text-on-dark);
  opacity: 0.78;
  line-height: 1.55;
}

.sidebar-note {
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
}

/* figure（主内容容器）*/
.content-figure {
  flex: 1;
  min-width: 0;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--clr-border);
  padding: 2.25rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ===== 正文排版 ===== */
.prose-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--clr-text-body);
}
.prose-content h2,
.prose-content h3,
.prose-content h4 {
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--clr-dark);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}
.prose-content h2 { font-size: 1.45rem; }
.prose-content h3 { font-size: 1.2rem; }
.prose-content h4 { font-size: 1rem; }
.prose-content p { margin-bottom: 1.1rem; }
.prose-content ul,
.prose-content ol {
  margin: 0.75rem 0 1.1rem 1.5rem;
  list-style: disc;
}
.prose-content ol { list-style: decimal; }
.prose-content li { margin-bottom: 0.4rem; }
.prose-content strong { font-weight: 700; color: var(--clr-dark); }
.prose-content a {
  color: var(--clr-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose-content a:hover { color: var(--clr-dark); }
.prose-content blockquote {
  border-left: 4px solid var(--clr-primary);
  padding: 0.75rem 1.25rem;
  background: var(--clr-pink-soft);
  border-radius: 0 10px 10px 0;
  margin: 1.25rem 0;
  font-style: italic;
  color: var(--clr-text-muted);
}
.prose-content code {
  background: var(--clr-pink-soft);
  padding: 0.15em 0.45em;
  border-radius: 5px;
  font-size: 0.9em;
}
.prose-content pre {
  background: var(--clr-dark);
  color: var(--clr-text-on-dark);
  padding: 1.25rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.25rem 0;
}
.prose-content pre code { background: transparent; padding: 0; }
.prose-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}
.prose-content th {
  background: var(--clr-dark);
  color: var(--clr-secondary);
  padding: 0.65rem 1rem;
  text-align: left;
  font-family: var(--font-head);
  font-weight: 700;
}
.prose-content td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--clr-border);
}
.prose-content tr:nth-child(even) td { background: var(--clr-pink-soft); }

.page-date,
.update-tip {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
}
.update-tip { background: var(--clr-pink-soft); padding: 0.4rem 0.8rem; border-radius: 8px; }

/* ===== 标题装饰（h2 > span）===== */
.section-heading {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  color: var(--clr-dark);
  margin-bottom: 1.75rem;
  letter-spacing: -0.02em;
}
.section-heading span {
  position: relative;
  display: inline-block;
}
.section-heading span::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
  border-radius: 2px;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  gap: 1.25rem;
}
.guide-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.feature-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* child-card：a 直接子元素是 strong */
.child-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: #fff;
  border-radius: var(--radius-card);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow-card);
  border: 1.5px solid var(--clr-border);
  color: var(--clr-text-body);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
}
.child-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--clr-primary);
  color: var(--clr-text-body);
}
.child-card strong {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--clr-dark);
  line-height: 1.35;
  display: block;
}
.child-card .card-desc {
  font-size: 0.84rem;
  color: var(--clr-text-muted);
  line-height: 1.55;
  flex: 1;
}
.child-card .card-arrow {
  font-size: 1.1rem;
  color: var(--clr-primary);
  align-self: flex-end;
  transition: transform var(--transition);
}
.child-card:hover .card-arrow { transform: translateX(4px); }

/* ===== Inline Related（figure 内 aside）===== */
.inline-related {
  background: var(--clr-pink-soft);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--clr-border);
}

.related-label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--clr-primary);
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.related-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* related-pill：a 直接子元素是 strong */
.related-pill {
  display: inline-flex;
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-pill);
  padding: 0.45rem 1rem;
  min-height: 40px;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  color: var(--clr-text-body);
}
.related-pill:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  transform: translateY(-2px);
  color: #fff;
}
.related-pill:hover strong { color: #fff; }
.related-pill strong {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-dark);
  display: block;
}

/* ===== 首页特殊区块 ===== */
.home-intro-section { padding-top: 3.5rem; }

.home-figure { background: transparent; box-shadow: none; border: none; padding: 0; }
.home-prose { font-size: 1.05rem; }

.home-guide-section,
.home-feature-section {
  flex-direction: column;
  padding: 2rem 2.5rem 3rem;
}

/* ===== 默认布局 ===== */
.content-default { padding-top: 3rem; }
.content-main-body h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.8vw, 2.4rem);
  color: var(--clr-dark);
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.content-main-body .page-date {
  margin-bottom: 1.25rem;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--clr-dark);
  color: var(--clr-text-on-dark);
  padding: 2.5rem 2.5rem 1.75rem;
  text-align: center;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* footer address */
.footer-address {
  font-style: normal;
}

.footer-brand-big {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  display: block;
}

/* footer ul > li > a */
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: center;
}
.footer-links li a {
  color: var(--clr-text-on-dark);
  font-size: 0.88rem;
  opacity: 0.75;
  padding: 0.35rem 0;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: opacity var(--transition), color var(--transition);
}
.footer-links li a:hover {
  opacity: 1;
  color: var(--clr-secondary);
}

.footer-copy {
  font-size: 0.8rem;
  opacity: 0.55;
  line-height: 1.6;
}

/* ===== Scroll Reveal ===== */
.reveal-section {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 280ms ease, transform 280ms ease;
}
.reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .child-card,
  .cta-pill-btn,
  .hero-btn-primary,
  .hero-btn-secondary,
  .related-pill,
  .brand-icon-link {
    transition: none;
  }
}

/* ===== 移动端响应式 ===== */
@media (max-width: 900px) {
  :root { --nav-width: 0px; }

  .site-nav-aside {
    width: 100%;
    height: auto;
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    flex-direction: row;
    padding: 0.5rem 1rem;
    gap: 0.5rem;
    align-items: center;
    z-index: 200;
    overflow-x: auto;
    overflow-y: hidden;
    border-top: 1px solid rgba(235,135,156,0.2);
  }

  .nav-brand { margin-bottom: 0; flex-shrink: 0; }
  .brand-icon-link { width: 40px; height: 40px; }
  .logo-text-mark { font-size: 1.2rem; }

  .site-nav-aside nav { flex: 1; overflow-x: auto; }
  .site-nav-aside nav ul {
    flex-direction: row;
    gap: 4px;
    white-space: nowrap;
  }
  .site-nav-aside nav ul li a {
    padding: 0.5rem 0.75rem;
    font-size: 0.78rem;
    min-height: 40px;
    white-space: nowrap;
  }

  .nav-cta { margin-top: 0; flex-shrink: 0; }
  .cta-pill-btn { font-size: 0.75rem; padding: 0.55rem 1rem; white-space: nowrap; }

  .page-body-wrap { margin-left: 0; padding-bottom: 70px; }

  .content-section {
    flex-direction: column;
    padding: 1.75rem 1.25rem;
  }

  .content-sidebar {
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .sidebar-inner { flex: 1 1 200px; }

  .content-figure { padding: 1.5rem 1.25rem; }

  .hero-content { padding: 3rem 1.25rem 4.5rem; }
  .hero-h1 { font-size: clamp(1.5rem, 6vw, 2.4rem); }

  .inner-hero-content { padding: 1.5rem 1.25rem 3rem; }
  .inner-h1 { font-size: clamp(1.3rem, 5vw, 2rem); }

  .home-guide-section,
  .home-feature-section { padding: 1.5rem 1.25rem 2rem; }

  .cards-grid { grid-template-columns: 1fr; }
  .guide-grid,
  .feature-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }

  .site-footer { padding: 2rem 1.25rem 1.5rem; }
}

@media (max-width: 480px) {
  html { font-size: 16px; }
  .guide-grid,
  .feature-grid { grid-template-columns: 1fr; }
  .related-links-row { flex-direction: column; }
  .footer-brand-big { font-size: 2rem; }
  .hero-wrap { min-height: 50vh; }
  .hero-h1 { font-size: 1.6rem; }
  .hero-actions { flex-direction: column; align-items: center; }
}

/* ===== 无障碍焦点 ===== */
:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 3px;
}

/* ===== 打印 ===== */
@media print {
  .site-nav-aside { display: none; }
  .page-body-wrap { margin-left: 0; }
}