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

/* ============================
   CSS 自定义属性
   ============================ */
:root {
  --green: #87ff71;
  --yellow: #ffce5c;
  --dark: #192617;
  --dark2: #1f3019;
  --dark3: #253b1e;
  --white: #f5fff2;
  --text: #d4f0cc;
  --text-muted: #8ab882;
  --border: #87ff71;
  --nav-w: 220px;
  --radius-pill: 999px;
  --font-head: 'Newsreader', Georgia, serif;
  --font-body: 'Roboto', system-ui, sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ============================
   重置 & 基础
   ============================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
  background: var(--dark);
  color: var(--text);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--dark);
  background-image:
    radial-gradient(circle, #87ff7112 1px, transparent 1px);
  background-size: 28px 28px;
}

/* ============================
   左侧固定导航
   ============================ */
.side-nav {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--nav-w);
  height: 100vh;
  background: var(--dark2);
  border-right: 2px solid var(--green);
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  padding: 0 0 2rem 0;
}

.side-nav ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 0.75rem;
  width: 100%;
}

.side-nav ol li {
  width: 100%;
}

.side-nav ol li a {
  display: block;
  width: 100%;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.4;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.nav-brand-icon {
  display: flex !important;
  align-items: center;
  justify-content: center;
  padding: 0.5rem !important;
  margin-bottom: 0.5rem;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--green);
  color: var(--dark);
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

/* 药丸胶囊按钮 */
.pill-btn {
  border-radius: var(--radius-pill) !important;
  border: 1.5px solid transparent;
  padding: 0.55rem 0.9rem !important;
  background: transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
}

.pill-btn:hover {
  background: var(--dark3);
  border-color: var(--green);
  color: var(--green);
  transform: translateX(3px);
}

.pill-btn.active {
  background: var(--green);
  color: var(--dark);
  border-color: var(--green);
  font-weight: 700;
}

/* ============================
   页面整体布局
   ============================ */
.page-wrap {
  margin-left: var(--nav-w);
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 100vh;
  gap: 0;
}

/* ============================
   侧边 aside（内容左侧）
   ============================ */
.side-aside {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1.5px dashed #87ff7140;
  background: #1a2e17;
  padding: 2rem 1rem;
  z-index: 10;
}

.aside-inner {
  position: relative;
}

.aside-head {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 0.25rem;
  letter-spacing: 0.02em;
}

.aside-links {
  list-style: none;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.aside-links li a {
  display: block;
  padding: 0.45rem 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-links li a:hover {
  color: var(--green);
  border-left-color: var(--green);
  background: #87ff710d;
}

.aside-links li.current a {
  color: var(--green);
  border-left-color: var(--green);
  font-weight: 600;
}

/* ============================
   装饰图形
   ============================ */
.aside-deco {
  margin-top: 2rem;
  opacity: 0.25;
  pointer-events: none;
}

.triangle-deco {
  width: 60px;
  height: 52px;
  background: var(--yellow);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  transform: rotate(15deg);
}

.squiggle-deco {
  width: 80px;
  height: 20px;
  border-bottom: 3px wavy var(--green);
}

.circle-deco {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 3px solid var(--yellow);
}

.dot-deco {
  width: 60px;
  height: 60px;
  background-image: radial-gradient(circle, var(--green) 2px, transparent 2px);
  background-size: 10px 10px;
}

/* ============================
   Memphis 几何装饰元素
   ============================ */
.shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.shape-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--green);
  opacity: 0.35;
}

.shape-tri {
  width: 0;
  height: 0;
  border-left: 40px solid transparent;
  border-right: 40px solid transparent;
  border-bottom: 70px solid var(--yellow);
  opacity: 0.25;
  transform: rotate(-20deg);
}

.shape-dot-grid {
  width: 100px;
  height: 100px;
  background-image: radial-gradient(circle, var(--green) 2px, transparent 2px);
  background-size: 12px 12px;
  opacity: 0.3;
}

.shape-rect-outline {
  width: 70px;
  height: 50px;
  border: 3px solid var(--yellow);
  transform: rotate(10deg);
  opacity: 0.3;
}

.shape-zigzag {
  width: 120px;
  height: 16px;
  border-bottom: 3px dashed var(--green);
  opacity: 0.4;
}

.shape-green { border-color: var(--green) !important; }
.shape-yellow { border-color: var(--yellow) !important; }

/* ============================
   主内容区
   ============================ */
.main-content {
  padding: 2.5rem 2.5rem 4rem;
  max-width: 900px;
  min-width: 0;
}

/* ============================
   Hero（首页）
   ============================ */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 3rem 0 4rem;
}

.hero-bg-text {
  position: absolute;
  top: -0.1em;
  right: -0.1em;
  font-family: var(--font-head);
  font-size: clamp(6rem, 18vw, 14rem);
  font-weight: 700;
  color: var(--dark3);
  user-select: none;
  line-height: 1;
  letter-spacing: -0.03em;
  z-index: 0;
  mix-blend-mode: screen;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.hero-h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  max-width: 18em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 36em;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-shapes .shape-circle {
  top: 15%;
  right: 10%;
}

.hero-shapes .shape-tri {
  bottom: 20%;
  right: 20%;
}

.hero-shapes .shape-dot-grid {
  bottom: 10%;
  left: 5%;
}

/* ============================
   按钮
   ============================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  background: var(--green);
  color: var(--dark);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  text-decoration: none;
  border: 2px solid var(--green);
  transition: background 0.15s, color 0.15s, transform 0.15s;
  min-height: 44px;
}

.btn-primary:hover {
  background: var(--yellow);
  border-color: var(--yellow);
  color: var(--dark);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--green);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  text-decoration: none;
  border: 2px solid var(--green);
  transition: background 0.15s, color 0.15s, transform 0.15s;
  min-height: 44px;
}

.btn-ghost:hover {
  background: var(--green);
  color: var(--dark);
  transform: translateY(-2px);
}

/* ============================
   标签胶囊
   ============================ */
.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.85rem;
  background: var(--dark3);
  border: 1.5px solid var(--green);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.04em;
}

.tag-yellow {
  border-color: var(--yellow);
  color: var(--yellow);
}

/* ============================
   卡片（描边无阴影，无圆角）
   ============================ */
.card {
  border: 1.5px solid #87ff7140;
  border-radius: 0;
  padding: 1.25rem 1.5rem;
  background: var(--dark2);
  transition: border-color 0.15s, transform 0.15s;
  position: relative;
}

.card:hover {
  border-color: var(--green);
  transform: translateY(-2px);
}

.card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.card h3 a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.15s;
}

.card h3 a:hover {
  color: var(--green);
}

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

.card-date {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.card-inline {
  border-left: 3px solid var(--yellow);
}

/* ============================
   子页卡片列表
   ============================ */
.child-cards {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px dashed #87ff7130;
}

.child-cards h2 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.35rem;
}

.child-cards .subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

/* div > article×n 结构 */
.child-cards > article,
.guide-nav-section > article,
.other-features > article,
.faq-cta-section > article,
.about-links-section > article,
.privacy-footer-links > article {
  margin-top: 0.75rem;
}

/* ============================
   功能条带（首页）
   ============================ */
.feature-strip {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px dashed #87ff7130;
}

.feature-strip h2 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.35rem;
}

.feature-strip .subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.strip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.strip-item {
  border: 1.5px solid #87ff7130;
  padding: 1.25rem 1rem;
  background: var(--dark2);
  transition: border-color 0.15s, transform 0.15s;
  position: relative;
}

.strip-item:hover {
  border-color: var(--yellow);
  transform: translateY(-2px);
}

.strip-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.6rem;
}

.strip-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--white);
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.strip-item p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================
   h2 + p.subtitle 结构
   ============================ */
.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

h2 + .subtitle {
  margin-top: 0.35rem;
}

/* ============================
   页面标题区
   ============================ */
.page-header-section {
  padding-bottom: 2rem;
  border-bottom: 1px dashed #87ff7130;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.page-num-deco {
  position: absolute;
  top: -0.15em;
  right: -0.05em;
  font-family: var(--font-head);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 700;
  color: var(--dark3);
  user-select: none;
  line-height: 1;
  z-index: 0;
  mix-blend-mode: screen;
  opacity: 0.6;
}

.page-header-section h1 {
  position: relative;
  z-index: 1;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.page-header-section .subtitle {
  position: relative;
  z-index: 1;
  max-width: 38em;
}

.pub-date, .mod-date {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--yellow);
  margin-bottom: 0.6rem;
  margin-right: 1rem;
  font-weight: 500;
}

/* ============================
   正文排版
   ============================ */
.prose {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  max-width: 70ch;
}

.prose h2 {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--white);
  margin: 2rem 0 0.5rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--green);
}

.prose h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--yellow);
  margin: 1.5rem 0 0.4rem;
}

.prose p {
  margin-bottom: 1rem;
}

.prose ul, .prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose a {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: #87ff7160;
  transition: color 0.15s, text-decoration-color 0.15s;
}

.prose a:hover {
  color: var(--yellow);
  text-decoration-color: var(--yellow);
}

.prose strong {
  color: var(--white);
  font-weight: 600;
}

.prose code {
  background: var(--dark3);
  padding: 0.15em 0.45em;
  border-radius: 3px;
  font-size: 0.88em;
  color: var(--green);
}

.prose blockquote {
  border-left: 3px solid var(--yellow);
  padding: 0.75rem 1rem;
  margin: 1.25rem 0;
  background: #87ff710a;
  color: var(--text-muted);
  font-style: italic;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

.prose th {
  background: var(--dark3);
  color: var(--green);
  padding: 0.5rem 0.75rem;
  text-align: left;
  border: 1px solid #87ff7130;
}

.prose td {
  padding: 0.5rem 0.75rem;
  border: 1px solid #87ff7120;
  color: var(--text);
}

/* ============================
   guide / feature / faq 专属
   ============================ */
.guide-nav-section,
.other-features,
.faq-cta-section,
.about-links-section,
.privacy-footer-links {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px dashed #87ff7130;
}

.guide-nav-section h2,
.other-features h2,
.faq-cta-section h2,
.about-links-section h2,
.privacy-footer-links h2 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.35rem;
}

/* feature hero */
.feature-hero-section {
  padding-bottom: 2rem;
  border-bottom: 1px dashed #87ff7130;
  margin-bottom: 2rem;
  position: relative;
}

.feature-tag-row {
  margin-bottom: 1rem;
}

.feature-hero-section h1 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.feature-shapes {
  position: absolute;
  top: 0;
  right: 0;
  pointer-events: none;
}

.feature-shapes .shape-rect-outline {
  top: 10px;
  right: 20px;
  position: absolute;
}

.feature-shapes .shape-zigzag {
  top: 60px;
  right: 10px;
  position: absolute;
}

/* faq shapes */
.faq-deco-shapes {
  position: absolute;
  top: 0;
  right: 0;
  pointer-events: none;
  width: 120px;
  height: 100px;
}

.faq-deco-shapes .shape-circle {
  top: 10px;
  right: 10px;
  position: absolute;
  width: 60px;
  height: 60px;
}

.faq-deco-shapes .shape-tri {
  top: 30px;
  right: 60px;
  position: absolute;
}

/* about shapes */
.about-shapes {
  position: absolute;
  top: 0;
  right: 0;
  pointer-events: none;
  width: 160px;
  height: 120px;
}

.about-shapes .shape-circle {
  top: 5px;
  right: 5px;
  position: absolute;
}

.about-shapes .shape-rect-outline {
  top: 40px;
  right: 60px;
  position: absolute;
}

.about-shapes .shape-dot-grid {
  bottom: 0;
  right: 0;
  position: absolute;
  width: 60px;
  height: 60px;
}

/* ============================
   页脚
   ============================ */
.site-footer {
  margin-left: var(--nav-w);
  background: var(--dark2);
  border-top: 2px solid var(--green);
  padding: 2.5rem 2.5rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -40px;
  left: 0;
  right: 0;
  height: 40px;
  background: repeating-linear-gradient(
    -45deg,
    var(--green) 0px,
    var(--green) 4px,
    transparent 4px,
    transparent 12px
  );
  opacity: 0.15;
}

.footer-brand-row {
  margin-bottom: 2rem;
}

.footer-brand-big {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.03em;
  line-height: 1;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-dl {
  min-width: 0;
}

.footer-dl dt {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--yellow);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #87ff7130;
}

.footer-dl dd {
  margin: 0 0 0.35rem 0;
}

.footer-dl dd a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.84rem;
  transition: color 0.15s;
  display: inline-block;
  min-height: 28px;
  line-height: 28px;
}

.footer-dl dd a:hover {
  color: var(--green);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px dashed #87ff7130;
}

.copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.15s;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.footer-links a:hover {
  color: var(--green);
}

/* ============================
   Scroll Reveal 动效
   ============================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================
   响应式断点
   ============================ */

/* 平板 */
@media (max-width: 1024px) {
  :root {
    --nav-w: 180px;
  }

  .main-content {
    padding: 2rem 1.75rem 3rem;
  }

  .page-wrap {
    grid-template-columns: 160px 1fr;
  }

  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --nav-w: 0px;
  }

  html {
    font-size: 16px;
  }

  /* 导航变顶部横条 */
  .side-nav {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    border-right: none;
    border-bottom: 2px solid var(--green);
    overflow-x: auto;
    overflow-y: hidden;
    z-index: 200;
    padding: 0;
  }

  .side-nav ol {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    align-items: center;
    white-space: nowrap;
  }

  .side-nav ol li {
    width: auto;
    flex-shrink: 0;
  }

  .side-nav ol li a {
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .pill-btn {
    padding: 0.45rem 0.75rem !important;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

  .pill-btn:hover {
    transform: none;
  }

  /* 页面布局变单列 */
  .page-wrap {
    margin-left: 0;
    margin-top: 60px;
    display: block;
    grid-template-columns: unset;
  }

  /* aside 变顶部横向条 */
  .side-aside {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px dashed #87ff7140;
    padding: 1rem 1.25rem;
  }

  .aside-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: flex-start;
  }

  .aside-head {
    width: 100%;
    margin-bottom: 0;
  }

  .aside-links {
    flex-direction: row;
    flex-wrap: wrap;
    margin-top: 0;
    gap: 0.35rem;
  }

  .aside-links li a {
    min-height: 40px;
    padding: 0.4rem 0.75rem;
    border-left: none;
    border: 1px solid #87ff7130;
    border-radius: var(--radius-pill);
  }

  .aside-deco {
    display: none;
  }

  .main-content {
    padding: 1.75rem 1.25rem 3rem;
    max-width: 100%;
  }

  /* Hero */
  .hero-section {
    min-height: 100svh;
    padding: 2rem 0 3rem;
  }

  .hero-bg-text {
    font-size: clamp(4rem, 22vw, 8rem);
    opacity: 0.5;
  }

  .hero-h1 {
    font-size: clamp(1.6rem, 6vw, 2.5rem);
  }

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

  .btn-primary, .btn-ghost {
    min-height: 48px;
    font-size: 1rem;
  }

  /* 条带 */
  .strip-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 页脚 */
  .site-footer {
    margin-left: 0;
    padding: 2rem 1.25rem 1.5rem;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .footer-brand-big {
    font-size: clamp(1.5rem, 7vw, 2.5rem);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .strip-grid {
    grid-template-columns: 1fr;
  }

  .page-header-section h1,
  .feature-hero-section h1 {
    font-size: 1.5rem;
  }
}

/* ============================
   FAQ 特殊样式
   ============================ */
.faq-content .prose h2 {
  color: var(--yellow);
  border-left-color: var(--yellow);
}

/* ============================
   过渡动画补充
   ============================ */
@media (prefers-reduced-motion: no-preference) {
  .card {
    transition: border-color 0.15s, transform 0.2s var(--ease-out);
  }

  .strip-item {
    transition: border-color 0.15s, transform 0.2s var(--ease-out);
  }
}