/* ================================================
   Redstone SEO — 主樣式表
   色系：紅石紅 #C8102E、中性灰階
   字體：Noto Sans TC + 系統字型
   ================================================ */

:root {
  --c-primary: #C8102E;
  --c-primary-dark: #9B0C23;
  --c-primary-soft: #FEF2F4;
  --c-ink: #0F172A;
  --c-text: #1F2937;
  --c-muted: #64748B;
  --c-line: #E2E8F0;
  --c-bg: #FFFFFF;
  --c-bg-soft: #F8FAFC;
  --c-bg-dark: #0F172A;
  --c-accent: #F59E0B;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
  --max-w: 1200px;
  --ease: cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", "PingFang TC", Helvetica, Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--c-primary-dark); }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5 {
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.625rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { color: var(--c-text); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-soft { background: var(--c-bg-soft); }
.eyebrow {
  display: inline-block;
  color: var(--c-primary);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head p { color: var(--c-muted); margin-top: 12px; }

/* ===== 按鈕 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .9375rem;
  transition: all .25s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(200, 16, 46, 0.25);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(200, 16, 46, 0.35);
}
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-line);
}
.btn-ghost:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.btn-wa {
  background: #25D366;
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.3);
}
.btn-wa:hover { background: #1DB954; color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 18px 32px; font-size: 1rem; }

/* ===== 導覽列 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--c-ink);
  font-size: 1.125rem;
}
.brand-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
/* Footer brand (dark background) — keep mark visible */
.footer-grid .brand-mark { filter: drop-shadow(0 2px 6px rgba(200, 16, 46, 0.35)); }
.nav-menu {
  display: flex;
  gap: 6px;
  align-items: center;
}
.nav-menu a {
  color: var(--c-text);
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 500;
  font-size: .9375rem;
  transition: all .2s var(--ease);
}
.nav-menu a:hover { background: var(--c-bg-soft); color: var(--c-primary); }
.nav-menu a.active { color: var(--c-primary); }
.nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  width: 42px; height: 42px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* ===== Hero ===== */
.hero {
  padding: 80px 0 72px;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(200, 16, 46, 0.08), transparent 60%),
    radial-gradient(700px 400px at 0% 100%, rgba(245, 158, 11, 0.06), transparent 60%),
    #FFFFFF;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}
.hero h1 { margin-bottom: 20px; }
.hero h1 .hl {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 1.0625rem;
  color: var(--c-muted);
  margin-bottom: 28px;
  max-width: 560px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-meta div strong {
  display: block;
  color: var(--c-ink);
  font-size: 1.75rem;
  font-weight: 800;
}
.hero-meta div span {
  color: var(--c-muted);
  font-size: .875rem;
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3.2;
  background: linear-gradient(135deg, #FEF2F4, #FFE4E6);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  padding: 14px 18px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
}
.hero-badge-dot {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22C55E, #16A34A);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.hero-badge-text strong { display: block; color: var(--c-ink); font-size: .9375rem; }
.hero-badge-text span { color: var(--c-muted); font-size: .8125rem; }

/* ===== Logo 雲 ===== */
.logo-cloud {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-line);
}
.logo-cloud-title {
  text-align: center;
  color: var(--c-muted);
  font-size: .875rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.logo-cloud-items {
  display: flex;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
  align-items: center;
  color: var(--c-muted);
  font-weight: 700;
  font-size: 1.125rem;
  opacity: .65;
}

/* ===== Feature 卡片 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.feature {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all .3s var(--ease);
}
.feature:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}
.feature h3 { margin-bottom: 10px; }
.feature p { color: var(--c-muted); font-size: .9375rem; }

/* ===== 服務流程 ===== */
.steps { counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--c-line);
}
.step:first-child { border-top: 0; }
.step-num {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.125rem;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--c-muted); }

/* ===== 案例卡片 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s var(--ease);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-primary);
}
.case-cover {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #FEF2F4, #FEE2E4);
  overflow: hidden;
}
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.case-card:hover .case-cover img { transform: scale(1.05); }
.case-body { padding: 24px; }
.case-tag {
  display: inline-block;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.case-body h3 { margin-bottom: 10px; }
.case-body p { color: var(--c-muted); font-size: .9375rem; margin-bottom: 16px; }
.case-stats {
  display: flex;
  gap: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}
.case-stats div strong {
  display: block;
  color: var(--c-primary);
  font-size: 1.25rem;
  font-weight: 800;
}
.case-stats div span {
  color: var(--c-muted);
  font-size: .75rem;
}

/* ===== 部落格 ===== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.blog-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--c-primary);
}
.blog-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--c-bg-soft);
}
.blog-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.blog-card:hover .blog-cover img { transform: scale(1.05); }
.blog-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.blog-meta {
  display: flex;
  gap: 12px;
  font-size: .8125rem;
  color: var(--c-muted);
  margin-bottom: 10px;
}
.blog-body h3 { margin-bottom: 10px; }
.blog-body h3 a { color: var(--c-ink); }
.blog-body h3 a:hover { color: var(--c-primary); }
.blog-body p { color: var(--c-muted); font-size: .9375rem; flex: 1; }
.blog-read {
  margin-top: 14px;
  color: var(--c-primary);
  font-weight: 600;
  font-size: .9375rem;
}

/* ===== 文章頁 ===== */
.article {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.article header { margin-bottom: 32px; }
.article h1 { margin: 12px 0 16px; }
.article .article-meta {
  color: var(--c-muted);
  font-size: .9375rem;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 28px 0 40px;
  aspect-ratio: 16 / 9;
}
.article-cover img { width: 100%; height: 100%; object-fit: cover; }
.article-body h2 {
  margin: 40px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--c-line);
}
.article-body h3 { margin: 28px 0 12px; }
.article-body p { margin-bottom: 18px; color: var(--c-text); }
.article-body ul, .article-body ol {
  margin: 0 0 20px 24px;
  list-style: disc;
}
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; color: var(--c-text); }
.article-body blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  border-left: 4px solid var(--c-primary);
  background: var(--c-primary-soft);
  color: var(--c-ink);
  border-radius: 0 12px 12px 0;
  font-style: italic;
}
.article-body strong { color: var(--c-ink); }
.article-cta {
  margin-top: 40px;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  text-align: center;
}
.article-cta h3 { color: #fff; margin-bottom: 10px; }
.article-cta p { color: rgba(255,255,255,0.9); margin-bottom: 20px; }
.article-cta .btn-wa { background: #fff; color: var(--c-primary); }
.article-cta .btn-wa:hover { background: #fff; color: var(--c-primary-dark); }

/* ===== 麵包屑 ===== */
.breadcrumb {
  padding: 16px 0 0;
  font-size: .875rem;
  color: var(--c-muted);
}
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span { margin: 0 8px; color: var(--c-line); }

/* ===== 頁面頭區 ===== */
.page-head {
  padding: 64px 0 40px;
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-line);
  text-align: center;
}
.page-head h1 { margin-bottom: 12px; }
.page-head p { color: var(--c-muted); max-width: 680px; margin: 0 auto; }

/* ===== 價格 / FAQ / 數據帶 ===== */
.stats-band {
  background: var(--c-ink);
  color: #fff;
  padding: 56px 0;
}
.stats-band .grid-4 { gap: 24px; }
.stat-item { text-align: center; }
.stat-item strong {
  display: block;
  color: #fff;
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, #FCA5A5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-item span { color: #CBD5E1; font-size: .9375rem; }

/* ===== 聯絡表單 / 大型 CTA ===== */
.cta-band {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: 14px; }
.cta-band p { color: rgba(255, 255, 255, 0.92); max-width: 600px; margin: 0 auto 28px; }
.cta-band .btn-ghost { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.3); }
.cta-band .btn-ghost:hover { background: #fff; color: var(--c-primary); border-color: #fff; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 { margin-bottom: 10px; }
.contact-info p { color: var(--c-muted); margin-bottom: 28px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--c-line);
}
.contact-item:first-of-type { border-top: 0; }
.contact-icon {
  width: 42px; height: 42px;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-item strong { display: block; color: var(--c-ink); margin-bottom: 2px; }
.contact-item span, .contact-item a { color: var(--c-muted); }

.form-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
  font-size: .9375rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  font-size: .9375rem;
  font-family: inherit;
  color: var(--c-ink);
  background: #fff;
  transition: all .2s var(--ease);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid var(--c-line);
}
.faq-item summary {
  padding: 20px 0;
  cursor: pointer;
  font-weight: 600;
  color: var(--c-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--c-primary);
  font-weight: 300;
  transition: transform .2s var(--ease);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding-bottom: 20px; color: var(--c-muted); }

/* ===== Footer ===== */
.site-footer {
  background: var(--c-bg-dark);
  color: #CBD5E1;
  padding: 64px 0 24px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-grid .brand { color: #fff; margin-bottom: 14px; }
.footer-grid p { color: #94A3B8; font-size: .9375rem; }
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: #94A3B8;
  padding: 6px 0;
  font-size: .9375rem;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: #94A3B8;
  font-size: .875rem;
}

/* ===== 浮動 WhatsApp ===== */
.fab-wa {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4);
  z-index: 99;
  transition: all .25s var(--ease);
}
.fab-wa:hover { background: #1DB954; color: #fff; transform: scale(1.08); }

/* ===== 響應式 ===== */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .hero { padding: 56px 0 48px; }
  .nav-menu { display: none; position: absolute; top: 68px; left: 16px; right: 16px; background: #fff; flex-direction: column; align-items: stretch; padding: 16px; border-radius: var(--radius); border: 1px solid var(--c-line); box-shadow: var(--shadow); }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 14px; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-cta { display: none; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .step { grid-template-columns: 56px 1fr; gap: 14px; }
  .stat-item strong { font-size: 2rem; }
}

/* ===== 客戶評價 ===== */
.testimonial-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.testimonial-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.testimonial-stars {
  color: var(--c-accent);
  font-size: 1.125rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.testimonial-text {
  color: var(--c-text);
  font-size: .9375rem;
  line-height: 1.8;
  flex: 1;
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}
.testimonial-author img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}
.testimonial-author strong {
  display: block;
  color: var(--c-ink);
  font-size: .9375rem;
}
.testimonial-author span {
  color: var(--c-muted);
  font-size: .8125rem;
}

/* ===== 信任帶 ===== */
.trust-band {
  padding: 48px 0;
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.trust-items {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
}
.trust-item svg {
  color: var(--c-primary);
  flex-shrink: 0;
}
.trust-item strong {
  display: block;
  color: var(--c-ink);
  font-size: .9375rem;
  font-weight: 700;
}
.trust-item span {
  color: var(--c-muted);
  font-size: .8125rem;
}

/* ===== 小螢幕適配 ===== */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: .9375rem; }
  .hero-meta { gap: 16px; }
  .hero-meta div strong { font-size: 1.5rem; }
  .btn-lg { padding: 14px 24px; font-size: .9375rem; }
  .section-head h2 { font-size: 1.375rem; }
  .trust-items { gap: 24px; }
  .trust-item { flex-basis: 100%; }
  .testimonial-card { padding: 24px; }
}

/* ===== 輔助 ===== */
.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;
}
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }