@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;500;600;700&family=Quicksand:wght@300;400;500;600;700&display=swap');

/* ===== 变量 ===== */
:root {
  --green: #87ff71;
  --yellow: #ffce5c;
  --dark: #192617;
  --dark2: #1f3020;
  --dark3: #253d22;
  --light: #f4ffe0;
  --light2: #fffbe8;
  --text: #f0fde8;
  --text-muted: #a8d4a0;
  --font-main: 'Quicksand', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-accent: 'Caveat', cursive;
  --radius: 4px;
  --radius-lg: 12px;
  --shadow: 4px 4px 0 rgba(135,255,113,0.25);
  --shadow-y: 4px 4px 0 rgba(255,206,92,0.3);
  --max-w: 1200px;
  --prose-max: 780px;
  --transition: 0.25s ease;
}

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

/* ===== 页面包裹 ===== */
.page-wrap { min-height: 100vh; display: flex; flex-direction: column; }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  border-bottom: 3px solid var(--green);
}

.header-brand-row {
  background: var(--dark2);
  padding: 0.6rem 1.5rem;
  border-bottom: 2px dashed var(--yellow);
}

.brand-block {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-name {
  font-family: var(--font-accent);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.04em;
  text-decoration: none;
  line-height: 1.2;
}
.brand-name:hover { color: var(--yellow); text-decoration: none; }

.brand-logo { width: 36px; height: 36px; border-radius: 50%; }

.brand-geo {
  display: inline-block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.tri-deco {
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  background: var(--yellow);
  transform: rotate(-15deg);
}
.sq-deco {
  background: var(--green);
  transform: rotate(22deg);
  border-radius: 2px;
}

.header-nav-row {
  background: var(--dark3);
  padding: 0 1.5rem;
}

.main-nav {
  max-width: var(--max-w);
  margin: 0 auto;
}

.main-nav > p {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  align-items: stretch;
}

.main-nav > p > a {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  border-right: 1px solid rgba(135,255,113,0.12);
  transition: background var(--transition), color var(--transition);
  min-height: 44px;
  white-space: nowrap;
}
.main-nav > p > a:first-child { border-left: none; }
.main-nav > p > a:hover,
.main-nav > p > a[aria-current="page"] {
  background: rgba(135,255,113,0.12);
  color: var(--green);
  text-decoration: none;
}

/* ===== HERO（首页） ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  background: var(--dark2);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.hero-bg-text {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  font-family: var(--font-accent);
  font-size: clamp(12rem, 30vw, 28rem);
  font-weight: 700;
  color: rgba(135,255,113,0.04);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  line-height: 1;
  letter-spacing: -0.05em;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-visual {
  position: relative;
  min-height: 320px;
}

.hero-shape-block {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
  gap: 1rem;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--yellow);
  text-transform: uppercase;
}

.hero-h1 {
  font-family: var(--font-accent);
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--green);
  line-height: 1.2;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.8;
}

.hero-cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-top: 0.5rem;
}

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: repeating-linear-gradient(
    90deg,
    var(--dark) 0px, var(--dark) 8px,
    transparent 8px, transparent 16px
  );
  clip-path: polygon(0 60%, 3% 30%, 6% 60%, 9% 30%, 12% 60%, 15% 30%, 18% 60%, 21% 30%, 24% 60%, 27% 30%, 30% 60%, 33% 30%, 36% 60%, 39% 30%, 42% 60%, 45% 30%, 48% 60%, 51% 30%, 54% 60%, 57% 30%, 60% 60%, 63% 30%, 66% 60%, 69% 30%, 72% 60%, 75% 30%, 78% 60%, 81% 30%, 84% 60%, 87% 30%, 90% 60%, 93% 30%, 96% 60%, 99% 30%, 100% 60%, 100% 100%, 0 100%);
  opacity: 0.5;
}

/* ===== 内页 HERO ===== */
.inner-hero {
  position: relative;
  background: var(--dark2);
  padding: 4rem 1.5rem 3rem;
  border-bottom: 3px solid var(--yellow);
  overflow: hidden;
}

.inner-hero-bg-text {
  position: absolute;
  right: -1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-accent);
  font-size: clamp(6rem, 15vw, 14rem);
  font-weight: 700;
  color: rgba(255,206,92,0.05);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  line-height: 1;
}

.inner-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
}

.inner-h1 {
  font-family: var(--font-accent);
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--green);
  line-height: 1.25;
  margin: 0.5rem 0 0.75rem;
}

.inner-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.8;
}

.inner-hero-shapes {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 240px;
  pointer-events: none;
}

/* ===== GUIDE HERO ===== */
.guide-hero {
  position: relative;
  background: linear-gradient(135deg, var(--dark2) 0%, var(--dark3) 100%);
  padding: 4rem 1.5rem 3rem;
  border-bottom: 4px solid var(--green);
  overflow: hidden;
}

.guide-hero-bg-num {
  position: absolute;
  left: -0.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-accent);
  font-size: clamp(8rem, 20vw, 18rem);
  font-weight: 700;
  color: rgba(135,255,113,0.05);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

.guide-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
}

.guide-h1 {
  font-family: var(--font-accent);
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--yellow);
  line-height: 1.25;
  margin: 0.5rem 0 0.75rem;
}

.guide-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.8;
}

.guide-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.guide-hero-shapes {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 200px;
  pointer-events: none;
}

/* ===== HERO 装饰形状 ===== */
.memphis-circle {
  position: absolute;
  border-radius: 50%;
  border: 4px solid;
}
.c1 {
  width: 140px; height: 140px;
  top: 10%; left: 15%;
  border-color: var(--yellow);
  opacity: 0.45;
}
.c2 {
  width: 80px; height: 80px;
  bottom: 15%; right: 10%;
  border-color: var(--green);
  background: rgba(135,255,113,0.08);
  opacity: 0.6;
}
.c3 {
  width: 100px; height: 100px;
  top: 20%; right: 15%;
  border-color: var(--yellow);
  opacity: 0.4;
}

.memphis-tri {
  position: absolute;
  width: 0; height: 0;
}
.t1 {
  top: 20%; right: 20%;
  border-left: 45px solid transparent;
  border-right: 45px solid transparent;
  border-bottom: 78px solid var(--green);
  opacity: 0.18;
  transform: rotate(25deg);
}
.t2 {
  top: 30%; right: 10%;
  border-left: 35px solid transparent;
  border-right: 35px solid transparent;
  border-bottom: 60px solid var(--yellow);
  opacity: 0.22;
  transform: rotate(-15deg);
}

.memphis-squiggle {
  position: absolute;
  bottom: 20%; left: 5%;
  width: 80px; height: 30px;
  border-bottom: 4px solid var(--green);
  border-radius: 0 0 40px 40px;
  opacity: 0.5;
}
.sq2 {
  top: 30%; right: 5%;
  border-bottom-color: var(--yellow);
  width: 60px;
  opacity: 0.4;
}

.memphis-dot-grid {
  position: absolute;
  top: 40%; left: 30%;
  width: 120px; height: 80px;
  background-image: radial-gradient(circle, var(--yellow) 2px, transparent 2px);
  background-size: 14px 14px;
  opacity: 0.25;
}
.dg2 {
  top: 20%; right: 20%;
  background-image: radial-gradient(circle, var(--green) 2px, transparent 2px);
  opacity: 0.2;
}

/* ===== 内容区 + 侧边栏 ===== */
.content-with-aside {
  flex: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  padding: 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  align-items: start;
}

.main-content { min-width: 0; }

.page-article { display: flex; flex-direction: column; gap: 3rem; }

/* ===== article ===== */
.section-prose,
.section-children,
.section-nav-links,
.section-guide-links,
.section-links { }

/* ===== H2 + subtitle ===== */
h2 {
  font-family: var(--font-accent);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 0.25rem;
  position: relative;
  display: inline-block;
}
h2::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--green);
  margin-top: 4px;
  border-radius: 2px;
}

p.subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-style: italic;
  line-height: 1.6;
}

/* ===== 正文 ===== */
.prose-body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}
.prose-body h2,
.prose-body h3 { margin: 1.5rem 0 0.5rem; color: var(--green); }
.prose-body h3 { font-size: 1.15rem; color: var(--yellow); }
.prose-body p { margin-bottom: 1rem; }
.prose-body ul, .prose-body ol { padding-left: 1.5rem; margin-bottom: 1rem; list-style: disc; }
.prose-body ol { list-style: decimal; }
.prose-body li { margin-bottom: 0.4rem; }
.prose-body strong { color: var(--green); font-weight: 700; }
.prose-body a { color: var(--yellow); text-decoration: underline; }
.prose-body a:hover { color: var(--green); }
.prose-body blockquote {
  border-left: 4px solid var(--green);
  padding: 0.75rem 1.25rem;
  background: rgba(135,255,113,0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 1rem;
  font-style: italic;
  color: var(--text-muted);
}
.prose-body code {
  background: rgba(135,255,113,0.1);
  color: var(--green);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-size: 0.92em;
}
.prose-body table { width: 100%; border-collapse: collapse; margin-bottom: 1rem; }
.prose-body th { background: var(--dark3); color: var(--green); padding: 0.6rem 0.8rem; text-align: left; }
.prose-body td { padding: 0.5rem 0.8rem; border-bottom: 1px solid rgba(135,255,113,0.1); }

/* ===== 日期 ===== */
.pub-date, .mod-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: inline-block;
}
.pub-date::before { content: '📅 '; }
.mod-date::before { content: '🔄 '; }

/* ===== 子页卡片（table结构） ===== */
.child-table { width: 100%; border-collapse: separate; border-spacing: 0 0.75rem; }

.card-cell { padding: 0; }

.child-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.25rem 1.25rem 1rem;
  background: var(--dark2);
  border-radius: var(--radius);
  border-bottom: 4px solid var(--green);
  text-decoration: none;
  color: var(--text);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.child-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--yellow), transparent);
}
.child-card:hover {
  transform: translateY(-3px);
  border-color: var(--yellow);
  box-shadow: 0 6px 20px rgba(135,255,113,0.15);
  text-decoration: none;
}

.card-accent {
  display: none;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--green);
  line-height: 1.4;
}

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

.card-date {
  font-size: 0.78rem;
  color: rgba(168,212,160,0.6);
}

/* ===== 内联导航链接 ===== */
.inline-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.inline-nav-a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--dark3);
  color: var(--green);
  border: 2px solid var(--green);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
}
.inline-nav-a:hover {
  background: var(--green);
  color: var(--dark);
  text-decoration: none;
}

/* ===== 侧边栏 ===== */
.page-aside {
  position: sticky;
  top: 100px;
}

.aside-inner {
  background: var(--dark2);
  border: 2px solid rgba(135,255,113,0.2);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}
.aside-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--yellow));
}

.aside-inner h2 {
  font-size: 1.1rem;
  margin-bottom: 0.15rem;
}
.aside-inner h2::after { width: 40%; height: 2px; }

.aside-inner p.subtitle {
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.aside-inner nav {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.aside-link {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius);
  border-left: 3px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  min-height: 40px;
  line-height: 1.4;
}
.aside-link:hover,
.aside-link--active {
  background: rgba(135,255,113,0.08);
  color: var(--green);
  border-left-color: var(--green);
  text-decoration: none;
}

.aside-deco {
  position: absolute;
  bottom: -20px; right: -20px;
  opacity: 0.15;
  pointer-events: none;
}

.aside-brand-block {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed rgba(135,255,113,0.2);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.aside-brand-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--green);
}
.aside-brand-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  background: var(--green);
  color: var(--dark);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  min-height: 44px;
  box-shadow: 3px 3px 0 var(--dark);
}
.btn-primary:hover {
  background: #6fe85a;
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--dark);
  text-decoration: none;
  color: var(--dark);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  background: transparent;
  color: var(--yellow);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius);
  border: 2px solid var(--yellow);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  min-height: 44px;
}
.btn-secondary:hover {
  background: var(--yellow);
  color: var(--dark);
  text-decoration: none;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--dark2);
  border-top: 4px solid var(--green);
  margin-top: auto;
}

.footer-cta-block {
  background: linear-gradient(135deg, var(--dark3) 0%, rgba(135,255,113,0.08) 100%);
  padding: 3rem 1.5rem;
  text-align: center;
  border-bottom: 2px dashed rgba(135,255,113,0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.footer-cta-title {
  font-family: var(--font-accent);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--green);
}

.footer-cols {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: 2rem;
}

.footer-dl dt {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--yellow);
  margin-bottom: 0.75rem;
  font-family: var(--font-accent);
  font-size: 1.05rem;
}

.footer-dl dd {
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-dl dd a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-dl dd a:hover { color: var(--green); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(135,255,113,0.12);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-copy {
  font-size: 0.82rem;
  color: rgba(168,212,160,0.5);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}
.footer-links a {
  font-size: 0.82rem;
  color: rgba(168,212,160,0.5);
  text-decoration: none;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-links a:hover { color: var(--green); }

/* ===== FAQ 样式 ===== */
.faq-body details {
  background: var(--dark3);
  border-radius: var(--radius);
  border-left: 4px solid var(--green);
  margin-bottom: 0.75rem;
  padding: 0;
  overflow: hidden;
}
.faq-body summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--yellow);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 44px;
}
.faq-body summary::-webkit-details-marker { display: none; }
.faq-body summary::after {
  content: '＋';
  font-size: 1.2rem;
  color: var(--green);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 1rem;
}
.faq-body details[open] summary::after {
  content: '－';
  transform: rotate(0deg);
}
.faq-body details > *:not(summary) {
  padding: 0 1.25rem 1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== REVEAL 动画 ===== */
.reveal-block {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal-block.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-block {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn-primary:hover {
    transform: none;
    box-shadow: 3px 3px 0 var(--dark);
  }
  .child-card:hover { transform: none; }
}

/* ===== 视差装饰 ===== */
.parallax-shape {
  will-change: transform;
}

/* ===== Memphis 背景图案 ===== */
.section-prose {
  position: relative;
}
.section-prose::before {
  content: '';
  position: absolute;
  top: -10px; right: -10px;
  width: 80px; height: 80px;
  background-image: radial-gradient(circle, rgba(135,255,113,0.18) 2px, transparent 2px);
  background-size: 12px 12px;
  pointer-events: none;
  border-radius: var(--radius);
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .content-with-aside {
    grid-template-columns: 1fr;
    padding: 2rem 1.25rem;
  }
  .page-aside { position: static; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .hero-inner {
    grid-template-columns: 1fr;
    padding: 4rem 1.25rem 3rem;
    gap: 2rem;
  }
  .hero-visual { min-height: 160px; }
  .hero-text {
    align-items: flex-start;
    text-align: left;
  }
  .hero-cta-row { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .header-brand-row { padding: 0.5rem 1rem; }
  .brand-name { font-size: 1.2rem; }
  .header-nav-row { padding: 0 0.75rem; overflow-x: auto; }
  .main-nav > p {
    flex-wrap: nowrap;
    gap: 0;
  }
  .main-nav > p > a {
    padding: 0.65rem 0.8rem;
    font-size: 0.8rem;
    white-space: nowrap;
  }
  .hero-section { min-height: auto; padding-bottom: 0; }
  .hero-inner { padding: 3rem 1rem 2rem; }
  .hero-h1 { font-size: 1.6rem; }
  .guide-hero { padding: 2.5rem 1rem 2rem; }
  .guide-h1 { font-size: 1.5rem; }
  .inner-hero { padding: 2.5rem 1rem 2rem; }
  .inner-h1 { font-size: 1.4rem; }
  .content-with-aside { padding: 1.5rem 1rem; }
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2rem 1rem;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
  }
  .footer-cta-block { padding: 2rem 1rem; }
  .footer-cta-title { font-size: 1.4rem; }
  h2 { font-size: 1.35rem; }
  .inline-nav-links { flex-direction: column; }
  .inline-nav-a { width: 100%; justify-content: center; }
  .aside-inner { padding: 1.25rem; }
}

/* ===== 工具类 ===== */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}