/* roulang page: index */
:root {
  --brand: #0F766E;
  --brand-dark: #115E59;
  --brand-light: #CCFBF1;
  --accent: #F97316;
  --accent-light: #FFEDD5;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --bg: #F9FAFB;
  --card-bg: #FFFFFF;
  --gradient-brand: linear-gradient(135deg, #0F766E, #14B8A6);
  --gradient-cta: linear-gradient(135deg, #F97316, #FBBF24);
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --shadow-card: 0 4px 20px rgba(15, 118, 110, 0.08);
  --shadow-hover: 0 12px 32px rgba(15, 118, 110, 0.16);
  --shadow-float: 0 8px 24px rgba(15, 118, 110, 0.2);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'PingFang SC','Microsoft YaHei','Segoe UI',-apple-system,sans-serif;
  color: var(--text-main);
  background-color: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; height: auto; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style-position: inside; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
@media (max-width: 768px) { .container { padding: 0 1rem; } }

.section { padding: 6rem 0; position: relative; }
@media (max-width: 768px) { .section { padding: 3rem 0; } }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 1px 8px rgba(15, 118, 110, 0.04);
}
.nav-grid { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; height: 76px; gap: 1rem; }
.nav-left { display: flex; align-items: center; gap: 2rem; justify-content: flex-start; }
.nav-right { display: flex; align-items: center; gap: 2rem; justify-content: flex-end; }
.logo-text { font-size: 1.2rem; font-weight: 700; color: var(--brand-dark); letter-spacing: 0.01em; white-space: nowrap; display: flex; align-items: center; gap: 0.5rem; }
.logo-text .logo-fish { color: var(--accent); font-size: 1.4rem; }
.logo-text span.highlight { color: var(--brand-dark); }
.nav-link { font-size: 0.95rem; font-weight: 500; color: var(--text-muted); padding: 0.4rem 0.2rem; border-bottom: 2px solid transparent; transition: color 0.2s, border-color 0.2s; }
.nav-link:hover { color: var(--brand); border-bottom-color: var(--brand); }
.nav-link.active { color: var(--brand); font-weight: 600; border-bottom-color: var(--brand); }

.hamburger-btn { display: none; }
.mobile-menu { display: none; background: #fff; border-bottom: 1px solid var(--border); padding: 1rem 1.25rem; box-shadow: 0 8px 20px rgba(0,0,0,0.06); }
.mobile-menu.open { display: block; }
.mobile-menu .mobile-link { display: block; padding: 0.8rem 0; font-weight: 500; color: var(--text-main); border-bottom: 1px solid #f3f4f6; font-size: 1rem; }
.mobile-menu .mobile-link:last-child { border-bottom: none; }
.mobile-menu .mobile-link.active { color: var(--brand); font-weight: 600; }

@media (max-width: 960px) {
  .nav-left, .nav-right { display: none; }
  .hamburger-btn { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border-radius: 12px; background: transparent; font-size: 1.3rem; color: var(--text-main); }
  .nav-grid { grid-template-columns: auto 1fr auto; height: 68px; }
  .nav-left-placeholder { display: block; }
  .logo-text { font-size: 1.05rem; }
}
@media (max-width: 420px) {
  .logo-text { font-size: 0.92rem; }
  .logo-text .logo-fish { font-size: 1.1rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.55rem;
  padding: 0.8rem 1.6rem; border-radius: 9999px; font-size: 1rem; font-weight: 600;
  transition: all 0.22s ease; line-height: 1.4; white-space: nowrap;
}
.btn:focus-visible { outline: 3px solid rgba(15,118,110,0.45); outline-offset: 2px; }
.btn-primary { background: var(--gradient-cta); color: #fff; box-shadow: 0 4px 16px rgba(249,115,22,0.28); }
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 8px 24px rgba(249,115,22,0.35); }
.btn-primary:active { transform: translateY(0); filter: brightness(0.94); }
.btn-secondary { background: #fff; color: var(--brand-dark); border: 1.5px solid var(--brand); box-shadow: 0 2px 8px rgba(15,118,110,0.08); }
.btn-secondary:hover { border-color: var(--brand-dark); background: #f0fdfa; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(15,118,110,0.12); }
.btn-secondary:active { transform: translateY(0); }
.btn-lg { padding: 1rem 2.2rem; font-size: 1.125rem; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, #f0fdfa 0%, #ffffff 50%, #fff7ed 100%);
  overflow: hidden;
  padding: 5rem 0 4rem;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  opacity: 0.06;
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 3rem; align-items: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--brand-light); color: var(--brand-dark);
  font-size: 0.8rem; font-weight: 700; border-radius: 9999px;
  padding: 0.3rem 0.9rem; letter-spacing: 0.04em;
}
.hero h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.2; color: var(--text-main); margin: 1.2rem 0 1rem; letter-spacing: -0.01em; }
.hero-sub { font-size: 1.05rem; color: var(--text-muted); max-width: 32rem; line-height: 1.8; margin-bottom: 1.8rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.6rem; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 1.4rem; }
.trust-item { display: flex; align-items: center; gap: 0.4rem; font-size: 0.88rem; color: var(--text-muted); }
.trust-item i { color: var(--brand); }

.hero-visual { position: relative; }
.browser-frame {
  border-radius: 1.5rem; background: #fff; overflow: hidden;
  box-shadow: 0 20px 50px rgba(15,118,110,0.18);
  border: 1px solid rgba(15,118,110,0.08);
  transform: perspective(1200px) rotateY(-2deg) rotateX(1deg);
}
.browser-bar { display: flex; align-items: center; gap: 0.45rem; background: #f8fafc; padding: 0.8rem 1rem; border-bottom: 1px solid #eef2f7; }
.brow-dot { width: 11px; height: 11px; border-radius: 50%; display: block; }
.brow-dot.red { background: #ff5f57; }
.brow-dot.yellow { background: #febc2e; }
.brow-dot.green { background: #28c840; }
.browser-url { flex: 1; margin-left: 0.6rem; background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 0.78rem; color: #94a3b8; padding: 0.3rem 0.7rem; }
.browser-body img { width: 100%; height: 300px; object-fit: cover; object-position: top; }
.float-badge {
  position: absolute; display: flex; align-items: center; gap: 0.6rem;
  background: rgba(255,255,255,0.95); border-radius: 1rem;
  padding: 0.7rem 1rem; box-shadow: var(--shadow-float);
  border: 1px solid rgba(15,118,110,0.08);
}
.float-badge strong { font-size: 1.15rem; color: var(--text-main); display: block; line-height: 1.2; }
.float-badge small { font-size: 0.75rem; color: var(--text-muted); }
.badge-icon { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; background: var(--brand-light); color: var(--brand-dark); font-size: 1rem; }
.badge-1 { top: -1rem; left: -1.2rem; }
.badge-2 { bottom: 2.5rem; right: -1.5rem; }
.badge-3 { bottom: -1.2rem; left: 1rem; }
.badge-2 .badge-icon { background: var(--accent-light); color: var(--accent); }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero h1 { font-size: 2.3rem; }
  .badge-2 { right: 0.5rem; }
}
@media (max-width: 640px) {
  .hero { padding: 2.5rem 0 2rem; }
  .hero h1 { font-size: 1.8rem; }
  .hero-sub { font-size: 0.98rem; }
  .hero-actions .btn { width: 100%; }
  .badge-1 { left: -0.2rem; top: -0.5rem; }
  .badge-2 { right: -0.2rem; }
  .browser-body img { height: 220px; }
}

/* ---------- Stats Bar ---------- */
.stats-bar { background: #fff; border-bottom: 1px solid var(--border); padding: 2.5rem 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.stat-item { text-align: center; padding: 1rem 0.5rem; position: relative; }
.stat-item + .stat-item::before { content: ''; position: absolute; left: 0; top: 20%; height: 60%; width: 1px; background: var(--border); }
.stat-number {
  font-size: 2rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em;
  background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.2rem; }
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item + .stat-item::before { display: none; }
  .stat-number { font-size: 1.5rem; }
}

/* ---------- Section Common ---------- */
.section-header { max-width: 640px; margin: 0 auto 3rem; text-align: center; }
.section-tag {
  display: inline-block; font-size: 0.78rem; font-weight: 700; color: var(--accent);
  background: var(--accent-light); border-radius: 9999px; padding: 0.3rem 1rem;
  letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 0.8rem;
}
.section-header h2 { font-size: 2rem; font-weight: 800; color: var(--text-main); margin-bottom: 0.6rem; line-height: 1.25; }
.section-header p { font-size: 1rem; color: var(--text-muted); line-height: 1.7; }
@media (max-width: 768px) {
  .section-header h2 { font-size: 1.6rem; }
}

/* ---------- Features Carousel ---------- */
.features-section { background: #fff; }
.carousel-wrapper { position: relative; }
.carousel-ctrls { display: flex; justify-content: flex-end; gap: 0.8rem; margin-bottom: 1.2rem; }
.carousel-btn {
  width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--border);
  background: #fff; color: var(--brand-dark); font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease; box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.carousel-btn:hover { background: var(--brand-light); border-color: var(--brand); }
.carousel-btn:active { transform: scale(0.95); }
.feature-scroll {
  display: flex; gap: 1.5rem; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 1rem 0.25rem 1.5rem; scrollbar-width: none;
}
.feature-scroll::-webkit-scrollbar { display: none; }
.feature-card {
  flex: 0 0 320px; scroll-snap-align: start; background: var(--card-bg);
  border-radius: var(--radius-lg); border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-card); overflow: hidden;
  transition: all 0.3s ease; display: flex; flex-direction: column;
}
.feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
.feature-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; background: #e5e7eb; }
.feature-body { padding: 1.4rem 1.4rem 1.6rem; flex: 1; }
.feature-body h3 { font-size: 1.15rem; font-weight: 700; color: var(--text-main); margin-bottom: 0.4rem; }
.feature-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }
@media (max-width: 640px) {
  .feature-card { flex-basis: 85%; }
}

/* ---------- System Requirements ---------- */
.requirements-section { background: var(--bg); }
.requirement-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.req-card {
  background: #fff; border-radius: var(--radius-md); border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-card); padding: 1.8rem 1.6rem;
  transition: all 0.3s ease; display: flex; gap: 1rem; align-items: flex-start;
}
.req-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(15,118,110,0.15); }
.req-icon {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 14px;
  background: var(--brand-light); color: var(--brand-dark);
  display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
}
.req-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; }
.req-card p { font-size: 0.88rem; color: var(--text-muted); }
@media (max-width: 1024px) {
  .requirement-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .requirement-grid { grid-template-columns: 1fr; }
}

/* ---------- Testimonials ---------- */
.testimonials-section { background: #fff; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.8rem; align-items: start; }
.testimonial-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  border: 1px solid rgba(0,0,0,0.04); box-shadow: var(--shadow-card);
  padding: 1.8rem 1.6rem; position: relative; transition: all 0.3s ease;
}
.testimonial-card:nth-child(2) { transform: translateY(1.5rem); }
.testimonial-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.testimonial-card:nth-child(2):hover { transform: translateY(0.5rem); }
.testimonial-stars { color: #f59e0b; font-size: 0.9rem; letter-spacing: 0.1em; margin-bottom: 0.8rem; }
.testimonial-text { font-size: 0.95rem; color: var(--text-main); line-height: 1.75; margin-bottom: 1.2rem; }
.testimonial-user { display: flex; align-items: center; gap: 0.8rem; }
.testimonial-avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--gradient-brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 600; flex-shrink: 0;
}
.testimonial-name { font-weight: 600; font-size: 0.92rem; color: var(--text-main); }
.testimonial-time { font-size: 0.78rem; color: var(--text-muted); }
@media (max-width: 960px) {
  .testimonials-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .testimonial-card:nth-child(2) { transform: none; }
  .testimonial-card:nth-child(2):hover { transform: translateY(-4px); }
}

/* ---------- Download ---------- */
.download-section { background: var(--bg); }
.download-panel {
  position: relative;
  background: #fff; border-radius: 2rem;
  border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-card);
  padding: 3.5rem 2rem; text-align: center;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover; background-position: center;
  overflow: hidden;
}
.download-panel::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(2px);
}
.download-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.download-inner h2 { font-size: 2rem; font-weight: 800; margin-bottom: 0.6rem; color: var(--text-main); }
.download-inner > p { font-size: 1rem; color: var(--text-muted); margin-bottom: 2rem; }
.download-btns { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.download-meta { display: flex; justify-content: center; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 2rem; }
.meta-chip { display: inline-flex; align-items: center; gap: 0.4rem; background: #fff; border: 1px solid var(--border); border-radius: 9999px; padding: 0.4rem 1.2rem; font-size: 0.85rem; color: var(--text-muted); box-shadow: 0 2px 6px rgba(0,0,0,0.02); }
.meta-chip i { color: var(--brand); }
.qr-placeholder {
  display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
}
.qr-box {
  width: 120px; height: 120px; border-radius: 1rem; background: #f8fafc;
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem; color: var(--brand-dark); opacity: 0.7;
}
.qr-label { font-size: 0.9rem; color: var(--text-main); font-weight: 500; }
@media (max-width: 640px) {
  .download-panel { padding: 2.5rem 1.2rem; border-radius: 1.5rem; }
  .download-inner h2 { font-size: 1.5rem; }
  .download-btns .btn { width: 100%; }
}

/* ---------- News / CMS List ---------- */
.news-section { background: #fff; }
.news-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 1.2rem; }
.news-card {
  display: flex; gap: 1.5rem; background: var(--card-bg);
  border-radius: var(--radius-md); border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-card); overflow: hidden; padding: 1.2rem 1.2rem 1.2rem 1.2rem;
  transition: all 0.3s ease; align-items: center;
}
.news-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(15,118,110,0.15); transform: translateY(-3px); }
.news-thumb { width: 150px; height: 96px; flex-shrink: 0; border-radius: 0.75rem; overflow: hidden; background: #e5e7eb; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: #9ca3af; font-size: 1.5rem; }
.news-content { flex: 1; min-width: 0; }
.news-meta { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.3rem; flex-wrap: wrap; }
.news-category { font-size: 0.75rem; font-weight: 700; color: var(--accent); background: var(--accent-light); border-radius: 9999px; padding: 0.18rem 0.7rem; }
.news-time { font-size: 0.78rem; color: var(--text-muted); }
.news-title { font-size: 1rem; font-weight: 700; color: var(--text-main); margin-bottom: 0.25rem; line-height: 1.4; }
.news-card:hover .news-title { color: var(--brand); }
.news-excerpt { font-size: 0.88rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.news-empty {
  background: var(--bg); border: 1px dashed var(--border); border-radius: var(--radius-md);
  padding: 3rem 1.5rem; text-align: center; color: var(--text-muted);
}
.news-empty i { font-size: 2rem; color: #cbd5e1; margin-bottom: 0.8rem; display: block; }
@media (max-width: 640px) {
  .news-card { flex-direction: column; gap: 0.8rem; align-items: stretch; }
  .news-thumb { width: 100%; height: 140px; }
}

/* ---------- FAQ ---------- */
.faq-section { background: var(--bg); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq-item { background: #fff; border-radius: var(--radius-md); border: 1px solid var(--border); box-shadow: 0 2px 10px rgba(0,0,0,0.02); overflow: hidden; transition: all 0.2s ease; }
.faq-item:hover { border-color: rgba(15,118,110,0.18); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.3rem 1.5rem; cursor: pointer; }
.faq-question h3 { font-size: 1.02rem; font-weight: 600; color: var(--text-main); flex: 1; }
.faq-icon { flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--brand-light); color: var(--brand-dark); font-size: 1.1rem; display: flex; align-items: center; justify-content: center; transition: transform 0.3s ease; font-weight: 400; }
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--accent-light); color: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; padding: 0 1.5rem; }
.faq-answer p { padding-bottom: 1.4rem; font-size: 0.95rem; color: var(--text-muted); line-height: 1.75; }
.faq-item.open .faq-answer { max-height: 600px; }

/* ---------- Final CTA ---------- */
.cta-section { padding: 4rem 0 5rem; background: var(--bg); }
.cta-card {
  position: relative; border-radius: 2rem; padding: 4rem 2.5rem; text-align: center;
  background: var(--gradient-brand); overflow: hidden;
  background-image: url('/assets/images/backpic/back-3.webp'), linear-gradient(135deg, #0F766E, #14B8A6);
  background-size: cover; background-position: center;
  box-shadow: 0 24px 60px rgba(15,118,110,0.3);
}
.cta-card::before { content: ''; position: absolute; inset: 0; background: rgba(11, 78, 73, 0.55); }
.cta-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cta-inner h2 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 0.8rem; line-height: 1.3; }
.cta-inner p { font-size: 1.05rem; color: #ccfbf1; margin-bottom: 2rem; }
.cta-inner .btn-primary { background: #fff; color: var(--brand-dark); box-shadow: 0 8px 30px rgba(0,0,0,0.2); }
.cta-inner .btn-primary:hover { background: var(--accent-light); color: var(--accent); }
@media (max-width: 640px) {
  .cta-card { padding: 2.5rem 1.5rem; border-radius: 1.5rem; }
  .cta-inner h2 { font-size: 1.5rem; }
}

/* ---------- Footer ---------- */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 4rem 0 0; }
.footer-top { display: grid; grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer-brand .logo-text { color: #fff; font-size: 1.2rem; margin-bottom: 0.8rem; }
.footer-brand .logo-fish { color: #f97316; }
.footer-brand p { font-size: 0.88rem; color: #94a3b8; line-height: 1.7; max-width: 280px; }
.footer-title { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 1.2rem; letter-spacing: 0.03em; }
.footer-links { list-style: none; padding-left: 0; }
.footer-links li { margin-bottom: 0.6rem; }
.footer-links a { font-size: 0.88rem; color: #94a3b8; transition: color 0.2s; }
.footer-links a:hover { color: #2dd4bf; }
.footer-contact p { font-size: 0.88rem; color: #94a3b8; display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.6rem; }
.footer-contact i { color: #f97316; width: 18px; text-align: center; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 1.5rem 0; text-align: center; font-size: 0.82rem; color: #64748b; }
.footer-bottom span { color: #94a3b8; }
@media (max-width: 960px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .footer-top { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* ---------- Misc ---------- */
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.divider { height: 1px; background: linear-gradient(to right, transparent, var(--border), transparent); }

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

/* roulang page: category1 */
:root {
            --brand: #0F766E;
            --brand-dark: #115E59;
            --brand-light: #CCFBF1;
            --accent: #F97316;
            --accent-light: #FFEDD5;
            --text-main: #1F2937;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --bg-page: #F9FAFB;
            --bg-card: #FFFFFF;
            --gradient-brand: linear-gradient(135deg, #0F766E, #14B8A6);
            --gradient-cta: linear-gradient(135deg, #F97316, #FBBF24);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            box-shadow: 0 2px 12px rgba(15, 118, 110, 0.04);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-grid {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            width: 100%;
            min-height: 72px;
            gap: 1rem;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 1.75rem;
        }
        .nav-right {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 1.75rem;
        }
        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 6px 2px;
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link:hover {
            color: var(--brand);
        }
        .nav-link.active {
            color: var(--brand);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient-brand);
        }
        .logo-text {
            display: flex;
            align-items: center;
            gap: 0.45rem;
            font-size: 1.05rem;
            font-weight: 600;
            white-space: nowrap;
            letter-spacing: -0.01em;
        }
        .logo-fish {
            color: var(--brand);
            font-size: 1.35rem;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.2s ease;
        }
        .hamburger-btn:hover {
            background: rgba(15, 118, 110, 0.06);
        }
        .hamburger-btn:focus-visible,
        .nav-link:focus-visible,
        .logo-text:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            padding: 0.5rem 1rem 1.25rem;
            flex-direction: column;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-link {
            font-size: 1rem;
            padding: 0.75rem 0.5rem;
            border-radius: 8px;
            color: var(--text-main);
            font-weight: 500;
            border-bottom: 1px solid rgba(0, 0, 0, 0.03);
        }
        .mobile-link:hover {
            background: var(--brand-light);
            color: var(--brand-dark);
        }
        .mobile-link.active {
            color: var(--brand);
            font-weight: 700;
            background: rgba(15, 118, 110, 0.05);
        }
        @media (max-width: 900px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-grid {
                grid-template-columns: 1fr auto 1fr;
                min-height: 60px;
            }
            .logo-text {
                font-size: 0.95rem;
                justify-content: center;
            }
            .hamburger-btn {
                display: inline-flex;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 5.5rem 0 4.5rem;
            background: linear-gradient(135deg, #F0FDFA 0%, #FFFFFF 45%, #FFF7ED 100%);
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 0, 0, 0.03);
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(20, 184, 166, 0.12) 0%, transparent 70%);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249, 115, 22, 0.08) 0%, transparent 70%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero-inner {
            max-width: 760px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #fff;
            border: 1px solid rgba(15, 118, 110, 0.15);
            color: var(--brand);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.3rem 0.85rem;
            border-radius: 9999px;
            margin-bottom: 1.25rem;
            box-shadow: 0 2px 8px rgba(15, 118, 110, 0.05);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-main);
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }
        .page-hero .hero-sub {
            font-size: 1.125rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 640px;
            margin-bottom: 1.75rem;
        }
        .hero-meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            align-items: center;
        }
        .hero-meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.8125rem;
            padding: 0.35rem 0.8rem;
            background: var(--accent-light);
            color: var(--accent);
            border-radius: 9999px;
            font-weight: 600;
        }
        .hero-meta-tag.teal {
            background: var(--brand-light);
            color: var(--brand-dark);
        }
        .hero-bg-img {
            position: absolute;
            top: 0;
            right: 0;
            width: 42%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
            pointer-events: none;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 3.5rem 0 2.75rem;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero .hero-sub {
                font-size: 1rem;
            }
        }

        /* ===== Feature Alternating ===== */
        .feature-alt-section {
            padding: 5rem 0;
        }
        .feature-alt-section.alt-bg {
            background: #fff;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--brand);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.75rem;
        }
        .section-label::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }
        .feature-alt-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .feature-alt-grid.reverse .feature-alt-img {
            order: 2;
        }
        .feature-alt-img {
            position: relative;
            border-radius: 1.5rem;
            overflow: hidden;
            box-shadow: var(--shadow-card, 0 4px 20px rgba(15, 118, 110, 0.08));
            border: 1px solid rgba(0, 0, 0, 0.04);
            aspect-ratio: 16/10;
        }
        .feature-alt-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-alt-img:hover img {
            transform: scale(1.03);
        }
        .feature-alt-img .img-tag {
            position: absolute;
            bottom: 1rem;
            left: 1rem;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(4px);
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--brand-dark);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
        }
        .feature-alt-content h3 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            color: var(--text-main);
        }
        .feature-alt-content p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .feature-list-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1rem;
        }
        .feature-list-inline span {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.8125rem;
            background: var(--bg-page);
            border: 1px solid var(--border);
            padding: 0.3rem 0.8rem;
            border-radius: 9999px;
            color: var(--text-main);
            font-weight: 500;
        }
        .feature-list-inline span i {
            color: var(--brand);
            font-size: 0.7rem;
        }
        @media (max-width: 900px) {
            .feature-alt-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .feature-alt-grid.reverse .feature-alt-img {
                order: 0;
            }
            .feature-alt-content h3 {
                font-size: 1.375rem;
            }
        }

        /* ===== Feature Cards ===== */
        .feature-cards-section {
            padding: 5rem 0;
            background: #fff;
        }
        .feature-cards-head {
            text-align: center;
            max-width: 620px;
            margin: 0 auto 3rem;
        }
        .feature-cards-head h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .feature-cards-head p {
            color: var(--text-muted);
            font-size: 1rem;
        }
        .feature-cards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            border-radius: 1rem;
            padding: 1.75rem 1.5rem;
            box-shadow: 0 4px 20px rgba(15, 118, 110, 0.06);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(15, 118, 110, 0.12);
        }
        .feature-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-dark);
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .feature-card h4 {
            font-size: 1.0625rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .feature-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 900px) {
            .feature-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .feature-cards-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA Dark ===== */
        .cta-soft-section {
            padding: 4rem 0;
            background: linear-gradient(135deg, #F0FDFA, #FFF7ED);
        }
        .cta-soft-card {
            background: var(--gradient-brand);
            border-radius: 1.5rem;
            padding: 3rem 3.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2.5rem;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(15, 118, 110, 0.25);
        }
        .cta-soft-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .cta-soft-card h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .cta-soft-card p {
            font-size: 0.9375rem;
            opacity: 0.9;
            max-width: 440px;
            line-height: 1.7;
        }
        .cta-soft-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-primary-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #fff;
            color: var(--brand-dark);
            font-weight: 700;
            font-size: 1rem;
            padding: 0.8rem 1.75rem;
            border-radius: 9999px;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
        }
        .btn-primary-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
            background: #f8fafc;
        }
        .btn-primary-white:active {
            transform: translateY(0);
        }
        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-white:active {
            transform: translateY(0);
        }
        @media (max-width: 800px) {
            .cta-soft-card {
                flex-direction: column;
                text-align: center;
                padding: 2.5rem 1.5rem;
            }
            .cta-soft-card p {
                max-width: 100%;
            }
            .cta-soft-actions {
                justify-content: center;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 5rem 0;
            background: #fff;
        }
        .faq-section .section-head {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .faq-section .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
        }
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 1rem;
            margin-bottom: 0.875rem;
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .faq-item:hover {
            border-color: rgba(15, 118, 110, 0.3);
            box-shadow: 0 4px 16px rgba(15, 118, 110, 0.05);
        }
        .faq-item.open {
            border-color: rgba(15, 118, 110, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: -2px;
            border-radius: 0.5rem;
        }
        .faq-question h3 {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.5;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-light);
            color: var(--brand-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9375rem;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-light);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 1.5rem 1.375rem;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.75;
        }
        .faq-answer-inner p {
            margin-bottom: 0.5rem;
        }
        .faq-answer-inner p:last-child {
            margin-bottom: 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.72);
            padding: 4rem 0 0;
            font-size: 0.9375rem;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 3rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 0.875rem;
        }
        .footer-brand .logo-fish {
            color: #5EEAD4;
        }
        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.75;
            max-width: 320px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-title {
            font-size: 0.9375rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #5EEAD4;
        }
        .footer-contact p {
            font-size: 0.875rem;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-contact i {
            color: #5EEAD4;
            width: 16px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            padding: 1.5rem 0;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }
        @media (max-width: 900px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 520px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 1.75rem;
            }
        }

/* roulang page: article */
:root {
  --brand: #0F766E;
  --brand-dark: #115E59;
  --brand-light: #CCFBF1;
  --accent: #F97316;
  --accent-light: #FFEDD5;
  --text: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --bg: #F9FAFB;
  --card: #FFFFFF;
  --grad-brand: linear-gradient(135deg, #0F766E, #14B8A6);
  --grad-cta: linear-gradient(135deg, #F97316, #FBBF24);
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --radius-full: 9999px;
  --shadow-card: 0 4px 20px rgba(15, 118, 110, 0.08);
  --shadow-hover: 0 12px 32px rgba(15, 118, 110, 0.16);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: 100%; }
button { cursor: pointer; border: none; background: none; }

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

/* ========== 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.85);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.nav-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  gap: 1rem;
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-right { justify-content: flex-end; }
.logo-text {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  transition: opacity 0.2s;
}
.logo-text:hover { opacity: 0.85; }
.logo-fish { color: var(--brand); font-size: 1.3rem; }
.nav-link {
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--brand); background: var(--brand-light); }
.nav-link.active { color: var(--brand); font-weight: 700; background: var(--brand-light); }
.nav-left-placeholder { display: none !important; }
.hamburger-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 1.1rem;
  transition: border-color 0.2s, background 0.2s;
}
.hamburger-btn:hover { border-color: var(--brand); background: var(--brand-light); }
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 0.75rem 1.25rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.08);
}
.mobile-menu.open { display: flex; }
.mobile-link {
  padding: 0.7rem 0.85rem;
  border-radius: 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}
.mobile-link:hover { background: var(--brand-light); color: var(--brand); }
.mobile-link.active { color: var(--brand); font-weight: 700; background: var(--brand-light); }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.35);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(15, 118, 110, 0.35); filter: brightness(1.06); }
.btn-primary:active { transform: translateY(0); filter: brightness(0.98); }
.btn-outline {
  background: #fff;
  color: var(--brand-dark);
  border-color: var(--brand);
}
.btn-outline:hover { background: var(--brand-light); border-color: var(--brand-dark); transform: translateY(-2px); }
.btn-cta {
  background: #fff;
  color: var(--accent);
  font-size: 1.125rem;
  padding: 1rem 2.25rem;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
}
.btn-cta:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(0, 0, 0, 0.22); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.26); transform: translateY(-2px); }

/* ========== 文章页 ========== */
.article-page { padding: 3rem 0 4rem; }

.breadcrumb {
  max-width: 860px;
  margin: 0 auto 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.breadcrumb a { transition: color 0.2s; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { color: #CBD5E1; }
.breadcrumb .current {
  color: var(--text-muted);
  font-weight: 500;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-hero {
  max-width: 860px;
  margin: 0 auto 2.5rem;
  padding: 3rem 2.5rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.94), rgba(20, 184, 166, 0.86)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.article-hero::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -110px;
  right: -80px;
  pointer-events: none;
}
.category-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  backdrop-filter: blur(4px);
  position: relative;
  z-index: 1;
}
.article-hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 1.5rem;
  letter-spacing: 0.01em;
}
.article-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.92);
}
.article-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }
.article-meta i { font-size: 0.875rem; }

.article-content {
  max-width: 720px;
  margin: 0 auto;
  background: var(--card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-card);
  padding: 2.75rem 3rem;
  overflow-wrap: break-word;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.25rem 0 1rem;
  color: var(--text);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--brand-light);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.75rem 0 0.75rem;
  color: var(--text);
}
.article-content p {
  margin-bottom: 1.25rem;
  color: #374151;
  line-height: 1.8;
}
.article-content ul,
.article-content ol {
  margin: 1.25rem 0;
  padding-left: 1.5rem;
  color: #374151;
  display: grid;
  gap: 0.5rem;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li::marker { color: var(--brand); font-weight: 700; }
.article-content blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 4px solid var(--brand);
  background: var(--brand-light);
  border-radius: 0 0.75rem 0.75rem 0;
  color: var(--brand-dark);
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-card);
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}
.article-content pre {
  background: #0F172A;
  color: #E2E8F0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 1.5rem 0;
}
.article-content code {
  background: var(--brand-light);
  color: var(--brand-dark);
  padding: 0.2rem 0.45rem;
  border-radius: 0.375rem;
  font-size: 0.875em;
}
.article-content pre code {
  background: none;
  color: inherit;
  padding: 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  text-align: left;
}
.article-content th {
  background: var(--brand-light);
  font-weight: 700;
  color: var(--brand-dark);
}
.article-content a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--brand-dark); }

.article-footer {
  max-width: 720px;
  margin: 2rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.tags, .share {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}
.tag {
  display: inline-block;
  background: var(--brand-light);
  color: var(--brand-dark);
  padding: 0.28rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background 0.2s;
}
.tag:hover { background: #99F6E4; }
.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9375rem;
  transition: all 0.2s;
}
.share-btn:hover { background: var(--brand); color: #fff; border-color: var(--brand); transform: translateY(-2px); }

.recommend-section {
  max-width: 1060px;
  margin: 4.5rem auto 0;
}
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 2.5rem;
  color: var(--text);
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  border-radius: 9999px;
  background: var(--grad-brand);
  margin: 0.75rem auto 0;
}
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.recommend-card {
  background: var(--card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  display: block;
}
.recommend-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
  border-color: rgba(15, 118, 110, 0.3);
}
.recommend-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.recommend-card:hover img { transform: scale(1.04); }
.rc-body { padding: 1.25rem 1.5rem 1.5rem; }
.rc-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text);
  transition: color 0.2s;
}
.recommend-card:hover .rc-body h3 { color: var(--brand); }
.rc-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}
.rc-tag {
  font-size: 0.75rem;
  color: #94A3B8;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.rc-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  display: inline-block;
}

.back-entry {
  max-width: 720px;
  margin: 2.75rem auto 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.not-found {
  max-width: 720px;
  margin: 4rem auto;
  text-align: center;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-card);
  padding: 3.5rem 2.5rem;
}
.not-found i {
  font-size: 3rem;
  color: var(--brand);
  margin-bottom: 1.25rem;
  display: inline-block;
  opacity: 0.6;
}
.not-found h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.not-found p {
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

/* ========== 最终 CTA ========== */
.final-cta { padding: 4.5rem 0 5rem; }
.cta-card {
  background: var(--grad-cta);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(249, 115, 22, 0.25);
}
.cta-card::before {
  content: '';
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  top: -140px;
  right: -100px;
  pointer-events: none;
}
.cta-card::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  bottom: -80px;
  left: 40px;
  pointer-events: none;
}
.cta-card h2 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.cta-card p {
  position: relative;
  z-index: 1;
  opacity: 0.95;
  margin-bottom: 1.75rem;
  font-size: 1rem;
}
.cta-buttons {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #0F172A;
  color: #94A3B8;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  padding: 4rem 0 2.5rem;
}
.footer-brand .logo-text { color: #fff; font-size: 1.1rem; }
.footer-brand .logo-text .logo-fish { color: #14B8A6; }
.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 300px;
}
.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.1rem;
  letter-spacing: 0.02em;
}
.footer-links {
  display: grid;
  gap: 0.5rem;
}
.footer-links a {
  color: #94A3B8;
  font-size: 0.875rem;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact p {
  color: #94A3B8;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-contact i { color: #14B8A6; width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.8125rem;
  color: #64748B;
}
.footer-bottom a { color: #94A3B8; }
.footer-bottom a:hover { color: #fff; }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .recommend-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .nav-left, .nav-right { display: none; }
  .nav-left-placeholder { display: flex !important; }
  .nav-grid { grid-template-columns: 1fr auto; }
  .logo-text { justify-content: flex-start !important; font-size: 0.95rem; }
  .mobile-menu { display: none; }
  .mobile-menu.open { display: flex; }
}
@media (max-width: 820px) and (min-width: 769px) {
  .mobile-menu { display: none !important; }
  .mobile-menu.open { display: flex !important; }
}
@media (max-width: 768px) {
  .container { padding: 0 1rem; }
  .article-page { padding: 2rem 0 3rem; }
  .article-hero { padding: 2.25rem 1.5rem; border-radius: var(--radius-md); }
  .article-hero h1 { font-size: 1.5rem; }
  .article-content { padding: 1.75rem 1.5rem; border-radius: var(--radius-md); }
  .article-content h2 { font-size: 1.3rem; }
  .article-footer { flex-direction: column; align-items: flex-start; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; padding: 3rem 0 2rem; }
  .recommend-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 2.75rem 1.5rem; }
  .final-cta { padding: 3rem 0 4rem; }
}
@media (max-width: 520px) {
  .nav-grid { min-height: 64px; }
  .logo-text { font-size: 0.875rem; }
  .logo-fish { font-size: 1.1rem; }
  .article-hero h1 { font-size: 1.3rem; }
  .back-entry .btn { width: 100%; }
  .recommend-card img { height: 180px; }
  .cta-buttons .btn { width: 100%; }
  .footer-bottom { line-height: 1.6; }
}

/* roulang page: category2 */
:root {
      --brand: #0F766E;
      --brand-dark: #115E59;
      --brand-light: #CCFBF1;
      --accent: #F97316;
      --accent-light: #FFEDD5;
      --text-main: #1F2937;
      --text-muted: #6B7280;
      --border: #E5E7EB;
      --bg-body: #F9FAFB;
      --bg-card: #FFFFFF;
      --grad-brand: linear-gradient(135deg, #0F766E, #14B8A6);
      --grad-cta: linear-gradient(135deg, #F97316, #FBBF24);
      --radius-lg: 1.5rem;
      --radius-md: 1rem;
      --shadow-card: 0 4px 20px rgba(15, 118, 110, 0.08);
      --shadow-hover: 0 12px 32px rgba(15, 118, 110, 0.16);
      --shadow-float: 0 8px 24px rgba(15, 118, 110, 0.2);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background: var(--bg-body);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    ul,
    ol {
      list-style: none;
    }
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 3px;
      border-radius: 6px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 1px 8px rgba(15, 118, 110, 0.05);
    }
    .nav-grid {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      height: 76px;
      position: relative;
    }
    .logo-text {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--brand);
      white-space: nowrap;
    }
    .logo-fish {
      font-size: 1.4rem;
      color: var(--brand);
      background: var(--brand-light);
      border-radius: 12px;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-left {
      justify-content: flex-start;
    }
    .nav-right {
      justify-content: flex-end;
    }
    .nav-link {
      font-size: 0.95rem;
      color: var(--text-muted);
      padding: 0.4rem 0.2rem;
      position: relative;
      transition: color 0.25s;
    }
    .nav-link:hover {
      color: var(--brand);
    }
    .nav-link.active {
      color: var(--brand);
      font-weight: 700;
    }
    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 100%;
      height: 2px;
      background: var(--grad-brand);
      border-radius: 2px;
    }
    .nav-left-placeholder {
      display: none;
    }
    .hamburger-btn {
      font-size: 1.4rem;
      color: var(--brand);
      padding: 0.5rem;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      background: #fff;
      transition: background 0.2s, color 0.2s;
    }
    .hamburger-btn:hover {
      background: var(--brand-light);
    }
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: #fff;
      border-top: 1px solid var(--border);
      padding: 0.5rem 1rem 1rem;
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
    }
    .mobile-menu.open {
      display: flex;
    }
    .mobile-link {
      padding: 0.75rem 0.5rem;
      font-size: 1rem;
      color: var(--text-main);
      border-bottom: 1px solid rgba(229, 231, 235, 0.5);
      transition: color 0.2s, padding-left 0.2s;
    }
    .mobile-link.active {
      color: var(--brand);
      font-weight: 700;
    }
    .mobile-link:last-child {
      border-bottom: none;
    }
    .mobile-link:hover {
      color: var(--brand);
      padding-left: 0.8rem;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.75rem 1.5rem;
      border-radius: 9999px;
      font-size: 1rem;
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-primary {
      background: var(--grad-brand);
      color: #fff;
      box-shadow: 0 4px 16px rgba(15, 118, 110, 0.25);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(15, 118, 110, 0.35);
      filter: brightness(1.05);
    }
    .btn-primary:active {
      transform: translateY(0);
      filter: brightness(0.95);
    }
    .btn-secondary {
      background: #fff;
      color: var(--brand);
      border: 1px solid var(--border);
    }
    .btn-secondary:hover {
      border-color: var(--brand);
      background: #f0fdfa;
      transform: translateY(-2px);
    }
    .btn-secondary:active {
      transform: translateY(0);
    }
    .btn-lg {
      padding: 1rem 2rem;
      font-size: 1.125rem;
    }

    /* Page Hero */
    .page-hero {
      position: relative;
      padding: 6rem 0 5rem;
      background: linear-gradient(135deg, rgba(204, 251, 241, 0.92), rgba(249, 250, 251, 0.65), rgba(255, 237, 213, 0.55)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      text-align: center;
      overflow: hidden;
    }
    .page-hero::before {
      content: "";
      position: absolute;
      width: 400px;
      height: 400px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(15, 118, 110, 0.12), transparent 70%);
      top: -120px;
      left: -100px;
      pointer-events: none;
    }
    .page-hero::after {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(249, 115, 22, 0.1), transparent 70%);
      bottom: -100px;
      right: -80px;
      pointer-events: none;
    }
    .page-hero .hero-inner {
      position: relative;
      z-index: 1;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: #fff;
      border: 1px solid var(--border);
      color: var(--brand);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 0.4rem 1.1rem;
      border-radius: 9999px;
      box-shadow: var(--shadow-card);
    }
    .page-hero h1 {
      font-size: 3rem;
      font-weight: 800;
      color: var(--brand-dark);
      margin: 1.2rem 0 1rem;
      letter-spacing: 1px;
    }
    .hero-sub {
      max-width: 720px;
      margin: 0 auto;
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .hero-actions {
      margin-top: 2rem;
      position: relative;
      z-index: 1;
    }

    /* Content Blocks */
    .content-block {
      padding: 6rem 0;
    }
    .content-block.reverse .content-grid {
      direction: rtl;
    }
    .content-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
      direction: ltr;
    }
    .content-image {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(0, 0, 0, 0.04);
      background: var(--brand-light);
      aspect-ratio: 16/10;
    }
    .content-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .content-image:hover img {
      transform: scale(1.03);
    }
    .section-label {
      display: inline-block;
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      margin-bottom: 0.8rem;
    }
    .content-text h2 {
      font-size: 1.9rem;
      color: var(--brand-dark);
      margin-bottom: 1.2rem;
    }
    .content-text p {
      color: var(--text-muted);
      margin-bottom: 1.2rem;
    }
    .check-list li {
      position: relative;
      padding-left: 1.6rem;
      margin-bottom: 0.6rem;
      color: var(--text-main);
    }
    .check-list li::before {
      content: "\2713";
      position: absolute;
      left: 0;
      color: var(--brand);
      font-weight: 700;
    }

    /* Steps */
    .steps-section {
      padding: 2rem 0 6rem;
    }
    .steps-wrapper {
      background: var(--grad-brand);
      border-radius: 2rem;
      padding: 4rem;
      position: relative;
      overflow: hidden;
      box-shadow: 0 16px 48px rgba(15, 118, 110, 0.18);
    }
    .steps-wrapper::before {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      background: rgba(255, 255, 255, 0.08);
      border-radius: 50%;
      top: -80px;
      right: -60px;
    }
    .steps-wrapper::after {
      content: "";
      position: absolute;
      width: 160px;
      height: 160px;
      background: rgba(255, 255, 255, 0.06);
      border-radius: 50%;
      bottom: -50px;
      left: -40px;
    }
    .steps-wrapper h2 {
      color: #fff;
      text-align: center;
      font-size: 2rem;
      margin-bottom: 3rem;
      position: relative;
      z-index: 1;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
      z-index: 1;
    }
    .step-card {
      background: rgba(255, 255, 255, 0.12);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 1.25rem;
      padding: 2rem 1.5rem;
      text-align: center;
      color: #fff;
      transition: transform 0.3s, background 0.3s;
    }
    .step-card:hover {
      transform: translateY(-6px);
      background: rgba(255, 255, 255, 0.18);
    }
    .step-num {
      font-size: 2.2rem;
      font-weight: 800;
      opacity: 0.4;
      display: block;
      margin-bottom: 0.8rem;
      line-height: 1;
    }
    .step-card h3 {
      font-size: 1.1rem;
      margin-bottom: 0.6rem;
    }
    .step-card p {
      font-size: 0.9rem;
      opacity: 0.85;
      line-height: 1.6;
    }

    /* FAQ */
    .faq-section {
      padding: 2rem 0 6rem;
    }
    .faq-section h2 {
      text-align: center;
      font-size: 2rem;
      color: var(--brand-dark);
      margin-bottom: 3rem;
    }
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      overflow: hidden;
      transition: box-shadow 0.3s;
    }
    .faq-item:hover {
      box-shadow: var(--shadow-card);
    }
    .faq-item h3 {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.25rem 1.5rem;
      font-size: 1.1rem;
      cursor: pointer;
      color: var(--text-main);
      user-select: none;
      margin: 0;
    }
    .faq-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--brand-light);
      color: var(--brand);
      font-size: 1.2rem;
      font-weight: 600;
      transition: transform 0.3s, background 0.3s, color 0.3s;
      flex-shrink: 0;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--accent-light);
      color: var(--accent);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-answer-inner {
      padding: 0 1.5rem 1.5rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* CTA */
    .cta-section {
      padding: 2rem 0 6rem;
    }
    .cta-card {
      background: var(--grad-cta);
      border-radius: 2rem;
      padding: 4rem 2rem;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
      box-shadow: 0 16px 48px rgba(249, 115, 22, 0.25);
    }
    .cta-card::before,
    .cta-card::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.15);
    }
    .cta-card::before {
      width: 220px;
      height: 220px;
      top: -80px;
      left: -60px;
    }
    .cta-card::after {
      width: 160px;
      height: 160px;
      bottom: -60px;
      right: -40px;
    }
    .cta-card h2 {
      font-size: 2.2rem;
      margin-bottom: 1rem;
      position: relative;
      z-index: 1;
    }
    .cta-card p {
      font-size: 1.05rem;
      opacity: 0.95;
      margin-bottom: 2rem;
      position: relative;
      z-index: 1;
    }
    .cta-buttons {
      display: flex;
      justify-content: center;
      gap: 1rem;
      position: relative;
      z-index: 1;
      flex-wrap: wrap;
    }
    .cta-card .btn-primary {
      background: #fff;
      color: var(--accent);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    }
    .cta-card .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
      filter: brightness(1.02);
    }
    .cta-card .btn-secondary {
      background: rgba(255, 255, 255, 0.2);
      border-color: rgba(255, 255, 255, 0.6);
      color: #fff;
    }
    .cta-card .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.3);
      border-color: #fff;
      transform: translateY(-2px);
    }
    .qr-box {
      margin-top: 2.2rem;
      display: flex;
      align-items: center;
      gap: 1.2rem;
      justify-content: center;
      position: relative;
      z-index: 1;
      flex-wrap: wrap;
    }
    .qr-placeholder {
      width: 88px;
      height: 88px;
      background: #fff;
      border-radius: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2.2rem;
      color: var(--brand);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    }
    .qr-box span {
      font-size: 0.95rem;
      opacity: 0.95;
    }
    .cta-meta {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-top: 2rem;
      font-size: 0.9rem;
      opacity: 0.9;
      position: relative;
      z-index: 1;
      flex-wrap: wrap;
    }

    /* Footer */
    .site-footer {
      background: #082F2C;
      color: rgba(255, 255, 255, 0.8);
      padding: 4rem 0 2rem;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 3rem;
      margin-bottom: 3rem;
    }
    .footer-brand .logo-text {
      color: #fff;
    }
    .footer-brand p {
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.65);
      max-width: 320px;
      line-height: 1.7;
      margin-top: 1rem;
    }
    .footer-title {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 1rem;
    }
    .footer-links li {
      margin-bottom: 0.6rem;
    }
    .footer-links a {
      color: rgba(255, 255, 255, 0.65);
      font-size: 0.9rem;
      transition: color 0.2s, padding-left 0.2s;
    }
    .footer-links a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-contact p {
      font-size: 0.9rem;
      margin-bottom: 0.6rem;
      color: rgba(255, 255, 255, 0.65);
    }
    .footer-contact i {
      margin-right: 0.5rem;
      color: var(--brand-light);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.5);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .content-grid {
        gap: 2.5rem;
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 1rem;
        padding-right: 1rem;
      }
      .nav-left,
      .nav-right {
        display: none;
      }
      .nav-left-placeholder {
        display: flex;
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
      }
      .nav-grid {
        height: 64px;
      }
      .logo-text {
        font-size: 1.15rem;
      }
      .page-hero {
        padding: 4rem 0 3rem;
      }
      .page-hero h1 {
        font-size: 2rem;
      }
      .hero-sub {
        font-size: 1rem;
      }
      .content-block {
        padding: 3rem 0;
      }
      .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .content-block.reverse .content-grid {
        direction: ltr;
      }
      .steps-section {
        padding: 1rem 0 3rem;
      }
      .steps-wrapper {
        padding: 2.5rem 1.25rem;
        border-radius: 1.5rem;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .steps-wrapper h2 {
        font-size: 1.6rem;
        margin-bottom: 2rem;
      }
      .faq-section {
        padding: 1rem 0 3rem;
      }
      .faq-section h2 {
        font-size: 1.6rem;
        margin-bottom: 2rem;
      }
      .cta-section {
        padding: 1rem 0 3rem;
      }
      .cta-card {
        padding: 3rem 1.25rem;
      }
      .cta-card h2 {
        font-size: 1.7rem;
      }
      .cta-buttons {
        flex-direction: column;
        align-items: center;
      }
      .btn-lg {
        width: 100%;
        justify-content: center;
      }
      .cta-meta {
        flex-direction: column;
        gap: 0.5rem;
      }
      .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
    }
    @media (max-width: 520px) {
      .logo-fish {
        width: 34px;
        height: 34px;
        font-size: 1.1rem;
      }
      .logo-text {
        font-size: 1rem;
        gap: 0.4rem;
      }
      .hero-badge {
        font-size: 0.75rem;
      }
      .content-text h2 {
        font-size: 1.5rem;
      }
    }

/* roulang page: category3 */
:root {
            --brand: #0F766E;
            --brand-dark: #115E59;
            --brand-light: #CCFBF1;
            --accent: #F97316;
            --accent-light: #FFEDD5;
            --text-main: #1F2937;
            --text-sub: #6B7280;
            --border-color: #E5E7EB;
            --bg-page: #F9FAFB;
            --bg-card: #FFFFFF;
            --gradient-brand: linear-gradient(135deg, #0F766E, #14B8A6);
            --gradient-cta: linear-gradient(135deg, #F97316, #FBBF24);
            --shadow-card: 0 4px 20px rgba(15, 118, 110, 0.08);
            --shadow-hover: 0 12px 32px rgba(15, 118, 110, 0.16);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            border: none;
            background: none;
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-grid {
            display: flex;
            align-items: center;
            height: 74px;
            position: relative;
            gap: 1rem;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 2rem;
            flex: 1;
        }
        .logo-text {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 1.05rem;
            color: var(--brand);
            white-space: nowrap;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .logo-fish {
            font-size: 1.35rem;
            color: var(--accent);
            transition: transform 0.3s;
        }
        .logo-text:hover .logo-fish {
            transform: rotate(-10deg) scale(1.08);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 2rem;
            justify-content: flex-end;
            flex: 1;
        }
        .nav-link {
            color: var(--text-sub);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.2s, font-weight 0.2s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand);
        }
        .nav-link.active {
            color: var(--brand);
            font-weight: 700;
        }
        .nav-left-placeholder {
            display: none !important;
        }
        .hamburger-btn {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 0.75rem;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: var(--brand);
            background: var(--brand-light);
            transition: background 0.2s;
        }
        .hamburger-btn:hover {
            background: #99F6E4;
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0.5rem 1.5rem 1.5rem;
            background: #fff;
            border-top: 1px solid var(--border-color);
            box-shadow: 0 20px 30px rgba(15, 118, 110, 0.1);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-link {
            padding: 0.75rem 0;
            border-bottom: 1px solid #F3F4F6;
            color: var(--text-main);
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        .mobile-link:last-child {
            border-bottom: none;
        }
        .mobile-link.active {
            color: var(--brand);
            font-weight: 700;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-size: 1rem;
            font-weight: 600;
            transition: transform 0.25s, box-shadow 0.25s, filter 0.25s, background 0.25s;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--gradient-brand);
            color: #fff;
            box-shadow: 0 4px 16px rgba(15, 118, 110, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            filter: brightness(1.08);
            box-shadow: 0 8px 24px rgba(15, 118, 110, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.98);
        }
        .btn-secondary {
            background: #fff;
            color: var(--brand);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover {
            border-color: var(--brand);
            background: #F0FDFA;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 118, 110, 0.12);
        }
        .btn-lg {
            padding: 1rem 2rem;
            font-size: 1.125rem;
        }
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.4);
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            padding: 5.5rem 0 4.5rem;
            background: linear-gradient(120deg, rgba(15, 118, 110, 0.94), rgba(20, 184, 166, 0.82)),
                url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(249, 115, 22, 0.22);
        }
        .banner-inner {
            position: relative;
            z-index: 2;
        }
        .banner-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 1.25rem;
            background: rgba(255, 255, 255, 0.15);
            padding: 0.35rem 1rem;
            border-radius: 9999px;
            backdrop-filter: blur(6px);
        }
        .banner-breadcrumb a:hover {
            color: #fff;
        }
        .page-banner h1 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
        }
        .page-banner p {
            max-width: 680px;
            margin: 0.5rem auto 0;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.92);
            line-height: 1.8;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-white {
            background: #fff;
        }
        .section-green {
            background: linear-gradient(180deg, #F0FDFA, #F9FAFB);
        }
        .section-head {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-head .subtitle {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand);
            background: var(--brand-light);
            padding: 0.35rem 1rem;
            border-radius: 9999px;
            margin-bottom: 1rem;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
        }
        .section-head p {
            max-width: 640px;
            margin: 0.75rem auto 0;
            color: var(--text-sub);
            font-size: 0.95rem;
        }

        /* ===== 规格速览 ===== */
        .spec-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .spec-card {
            background: var(--bg-card);
            border-radius: 1.25rem;
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .spec-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .spec-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.3rem;
            background: var(--gradient-brand);
            color: #fff;
        }
        .spec-card .num {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--brand);
            margin-bottom: 0.25rem;
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .spec-card .label {
            font-size: 0.9rem;
            color: var(--text-sub);
        }

        /* ===== 图文交替 ===== */
        .alternate-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
            margin-bottom: 4.5rem;
        }
        .alternate-block:last-child {
            margin-bottom: 0;
        }
        .alternate-block.reversed .block-image {
            order: 2;
        }
        .block-image {
            position: relative;
            border-radius: 1.25rem;
            overflow: hidden;
            box-shadow: 0 12px 36px rgba(15, 118, 110, 0.14);
            aspect-ratio: 16 / 10;
            background: var(--brand-light);
        }
        .block-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .block-image:hover img {
            transform: scale(1.03);
        }
        .block-body h2 {
            font-size: 1.75rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-main);
        }
        .block-body>p {
            color: var(--text-sub);
            font-size: 1rem;
            line-height: 1.85;
            margin-bottom: 1.25rem;
        }
        .block-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            color: var(--text-main);
            font-size: 0.95rem;
            margin-bottom: 0.6rem;
        }
        .block-list li i {
            color: var(--brand);
            margin-top: 0.3rem;
            font-size: 0.85rem;
        }
        .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1.25rem;
        }
        .tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--brand);
            background: var(--brand-light);
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
        }
        .tag.orange {
            color: var(--accent);
            background: var(--accent-light);
        }

        /* ===== 设备卡片 ===== */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .device-card {
            background: var(--bg-card);
            border-radius: 1.25rem;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .device-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .device-card .card-img {
            height: 180px;
            overflow: hidden;
            background: var(--brand-light);
        }
        .device-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .device-card:hover .card-img img {
            transform: scale(1.04);
        }
        .device-card .card-body {
            padding: 1.5rem;
        }
        .device-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .device-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ===== 自检流程 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: 1.25rem;
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--gradient-brand);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            border-radius: 1rem;
            padding: 1.25rem 1.5rem;
            box-shadow: var(--shadow-card);
            margin-bottom: 1rem;
            transition: box-shadow 0.3s;
        }
        .faq-item.active {
            box-shadow: var(--shadow-hover);
        }
        .faq-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 1rem;
        }
        .faq-header h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0;
            line-height: 1.5;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--brand-light);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 600;
            transition: transform 0.3s, background 0.3s, color 0.3s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            color: var(--text-sub);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
            padding-top: 1rem;
            border-top: 1px solid #F3F4F6;
            margin-top: 0.75rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--gradient-cta);
            border-radius: 1.5rem;
            padding: 3.5rem 3rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            margin-bottom: 4rem;
            box-shadow: 0 16px 48px rgba(249, 115, 22, 0.25);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(15, 118, 110, 0.22);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
        }
        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            max-width: 560px;
            margin: 0 auto 1.5rem;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.95);
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .cta-buttons .btn-ghost {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(6px);
        }
        .cta-buttons .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.28);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 2.5rem;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 1.15rem;
            position: static;
            transform: none;
        }
        .footer-brand p {
            margin-top: 1rem;
            font-size: 0.9rem;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 320px;
        }
        .footer-title {
            font-size: 1rem;
            color: #F1F5F9;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-links li {
            margin-bottom: 0.6rem;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 0.9rem;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-links a:hover {
            color: #14B8A6;
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .footer-contact i {
            color: #14B8A6;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 3rem;
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: #64748B;
        }

        /* ===== 响应式 ===== */
        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }
        @media (max-width: 1024px) {
            .spec-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-left-placeholder {
                display: flex !important;
                justify-content: flex-end;
                flex: 1;
            }
            .hamburger-btn {
                display: inline-flex;
            }
            .logo-text {
                position: static;
                transform: none;
                flex: 1;
            }
            .section {
                padding: 3rem 0;
            }
            .page-banner {
                padding: 3.5rem 0 3rem;
            }
            .page-banner h1 {
                font-size: 1.75rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
            .alternate-block,
            .alternate-block.reversed {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .alternate-block.reversed .block-image {
                order: 0;
            }
            .device-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 2.5rem 1.5rem;
                margin-bottom: 3rem;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 520px) {
            .spec-grid {
                grid-template-columns: 1fr;
            }
            .nav-grid {
                gap: 0.25rem;
            }
            .logo-text span {
                font-size: 0.9rem;
            }
            .logo-text .logo-fish {
                font-size: 1.1rem;
            }
            .btn-lg {
                padding: 0.85rem 1.5rem;
                font-size: 1rem;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .cta-buttons .btn {
                width: 100%;
            }
        }