/* roulang page: index */
:root {
  --brand-dark: #0D9488;
  --brand-mid: #14B8A6;
  --brand-light: #5EEAD4;
  --accent: #F59E0B;
  --accent-light: #FBBF24;
  --ink-dark: #0F172A;
  --ink-deep: #134E4A;
  --page-bg: #F5F7F6;
  --card-bg: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #64748B;
  --border-color: #E5E7EB;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 3px rgba(15,23,42,.04), 0 10px 25px rgba(15,23,42,.06);
  --shadow-hover: 0 20px 45px rgba(15,23,42,.10);
  --space-section: clamp(3.5rem, 7vw, 5.5rem);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --brand-gradient: linear-gradient(135deg, #0D9488 0%, #14B8A6 55%, #5EEAD4 100%);
  --accent-gradient: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
  --deep-gradient: linear-gradient(160deg, #0F172A 0%, #134E4A 100%);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--page-bg);
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--ink-dark); margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.125rem; line-height: 1.45; font-weight: 600; }
p { margin: 0 0 1rem; }
a { color: var(--brand-mid); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; height: auto; }
ul { padding: 0; margin: 0; list-style: none; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
.section { padding: var(--space-section) 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 2.5rem; }
.section-head h2 { margin-bottom: .25rem; }
.section-sub { font-size: .875rem; color: var(--text-secondary); margin: 0; }
.btn { border-radius: var(--radius-sm); font-weight: 600; padding: .75rem 1.5rem; border: 2px solid transparent; transition: all .25s ease; display: inline-flex; align-items: center; gap: .5rem; }
.btn-lg { padding: .875rem 2rem; border-radius: 12px; font-size: 1.0625rem; }
.btn-accent { background: var(--accent-gradient); color: #1F2937; border-color: transparent; }
.btn-accent:hover { filter: brightness(1.06); transform: translateY(-2px); color: #1F2937; box-shadow: 0 12px 30px rgba(245,158,11,.25); }
.btn-accent:active, .btn-accent:focus { transform: translateY(0); filter: brightness(.98); outline: 3px solid rgba(245,158,11,.3); }
.btn-primary-brand { background: var(--brand-gradient); color: #fff; border-color: transparent; }
.btn-primary-brand:hover { filter: brightness(1.06); transform: translateY(-2px); color: #fff; box-shadow: 0 12px 30px rgba(13,148,136,.25); }
.btn-primary-brand:active, .btn-primary-brand:focus { transform: translateY(0); filter: brightness(.98); outline: 3px solid rgba(13,148,136,.3); }
.btn-outline-brand { background: #fff; color: var(--brand-mid); border-color: rgba(13,148,136,.3); }
.btn-outline-brand:hover { background: rgba(13,148,136,.05); border-color: var(--brand-mid); color: var(--brand-dark); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.1); border-color: #fff; color: #fff; transform: translateY(-2px); }

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15,23,42,.06);
}
.site-header .navbar { padding: 0; min-height: 64px; }
.site-header .navbar-brand { display: flex; align-items: center; gap: 8px; padding: 0; margin-right: 2rem; }
.brand-icon {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--brand-gradient);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(13,148,136,.3);
}
.brand-icon svg { width: 20px; height: 20px; }
.brand-text { font-size: 1.25rem; font-weight: 700; color: var(--ink-dark); letter-spacing: -0.01em; }
.brand-text span { color: var(--brand-mid); }
.site-header .navbar-nav { gap: .25rem; }
.site-header .nav-link {
  padding: .5rem .875rem;
  font-size: .9375rem;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: 8px;
  position: relative;
  transition: color .2s, background .2s;
}
.site-header .nav-link:hover { color: var(--brand-mid); background: rgba(13,148,136,.08); }
.site-header .nav-link.active { color: var(--brand-mid); font-weight: 600; }
.site-header .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 12px; right: 12px;
  height: 2px;
  background: var(--brand-mid);
  border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.search-box {
  display: flex; align-items: center;
  background: #F5F7F6;
  border-radius: 8px;
  padding: 0 12px;
  border: 1px solid transparent;
  transition: border-color .2s, box-shadow .2s;
}
.search-box:focus-within { border-color: var(--brand-mid); box-shadow: 0 0 0 3px rgba(13,148,136,.15); }
.search-box svg { width: 16px; height: 16px; stroke: var(--text-secondary); margin-right: 8px; flex-shrink: 0; }
.search-box input { border: none; background: transparent; padding: .5rem 0; font-size: .875rem; width: 130px; color: var(--text-primary); outline: none; }
.search-box input::placeholder { color: var(--text-secondary); }
.search-box input:focus { box-shadow: none; }
.navbar-toggler { border: none; padding: 6px 8px; background: transparent; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(13,148,136,.2); }
.toggler-bar { display: block; width: 22px; height: 2px; background: var(--ink-dark); border-radius: 2px; margin: 5px 0; transition: all .3s ease; }
.site-header .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(2) { opacity: 0; }
.site-header .navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero-section { position: relative; background: var(--ink-dark); overflow: hidden; padding: clamp(4rem, 8vw, 6rem) 0; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .25; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,.88) 0%, rgba(19,78,74,.55) 100%); }
.hero-container { position: relative; z-index: 2; }
.hero-section .badge-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(94,234,212,.12); border: 1px solid rgba(94,234,212,.2); color: var(--brand-light); font-size: .8rem; font-weight: 500; padding: 4px 14px; border-radius: var(--radius-pill); margin-bottom: 1.25rem; }
.hero-section h1 { color: #fff; margin-bottom: 1rem; }
.hero-section .hero-sub { font-size: 1.0625rem; color: rgba(255,255,255,.75); max-width: 540px; margin-bottom: 2rem; line-height: 1.7; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-panel {
  background: rgba(255,255,255,.96);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
  max-width: 400px;
  margin-left: auto;
}
.hero-panel .panel-head { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--ink-dark); margin-bottom: 16px; font-size: 1rem; }
.hero-panel .panel-head svg { width: 20px; height: 20px; stroke: var(--brand-mid); }
.hero-panel ul li { display: flex; align-items: flex-start; gap: 10px; padding: 8px 0; border-bottom: 1px solid rgba(15,23,42,.05); font-size: .875rem; color: var(--text-primary); }
.hero-panel ul li:last-child { border-bottom: none; }
.hero-panel ul li svg { width: 18px; height: 18px; stroke: var(--brand-mid); flex-shrink: 0; margin-top: 3px; }
.hero-panel .panel-link { display: inline-flex; align-items: center; gap: 4px; margin-top: 14px; font-size: .875rem; font-weight: 600; color: var(--brand-mid); }
.hero-panel .panel-link:hover { color: var(--brand-dark); gap: 8px; }
.hero-panel .panel-link svg { width: 16px; height: 16px; }

/* Stats Bar */
.stats-bar { position: relative; z-index: 3; background: transparent; padding: 0 0 40px; margin-top: -30px; }
.stats-bar .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat-item {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  text-align: left;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255,255,255,.1);
  transition: transform .25s, box-shadow .25s;
}
.stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.stat-number { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; color: var(--accent); line-height: 1.1; background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: .8125rem; color: var(--text-secondary); margin-top: 4px; }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(15,23,42,.05);
  transition: transform .25s, box-shadow .25s;
  position: relative;
  overflow: hidden;
}
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--brand-gradient); opacity: 0; transition: opacity .25s; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.feature-card:hover::before { opacity: 1; }
.feature-card .feature-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(13,148,136,.1); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature-card .feature-icon svg { width: 24px; height: 24px; stroke: var(--brand-mid); }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: .875rem; color: var(--text-secondary); margin-bottom: 14px; line-height: 1.65; }
.feature-card .more-link { font-size: .8125rem; font-weight: 600; color: var(--brand-mid); display: inline-flex; align-items: center; gap: 4px; }
.feature-card .more-link:hover { gap: 8px; }
.feature-card .more-link svg { width: 14px; height: 14px; }
.feature-card.feature-lg { grid-column: span 2; background: linear-gradient(135deg, rgba(13,148,136,.04) 0%, rgba(255,255,255,1) 60%); }

/* Scenarios */
.scenario-block { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-bottom: 60px; }
.scenario-block:last-child { margin-bottom: 0; }
.scenario-block.reverse .scenario-img { order: 2; }
.scenario-block.reverse .scenario-content { order: 1; }
.scenario-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); }
.scenario-img img { width: 100%; height: 280px; object-fit: cover; display: block; transition: transform .4s ease; }
.scenario-img:hover img { transform: scale(1.02); }
.scenario-tag { display: inline-block; background: rgba(13,148,136,.1); color: var(--brand-mid); font-size: .75rem; font-weight: 600; padding: 4px 14px; border-radius: var(--radius-pill); margin-bottom: 12px; text-transform: none; }
.scenario-content h3 { font-size: 1.375rem; margin-bottom: 12px; }
.scenario-content p { color: var(--text-secondary); font-size: .9375rem; margin-bottom: 16px; }
.scenario-content .plan-link { font-size: .875rem; font-weight: 600; color: var(--brand-mid); display: inline-flex; align-items: center; gap: 6px; padding: 8px 0; border-bottom: 2px solid rgba(13,148,136,.2); }
.scenario-content .plan-link:hover { border-color: var(--brand-mid); gap: 10px; }
.scenario-wide {
  background: var(--ink-dark);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 40px;
}
.scenario-wide h3 { color: #fff; margin-bottom: 8px; }
.scenario-wide p { color: rgba(255,255,255,.7); margin: 0; font-size: .9375rem; }
.scenario-wide .btn { flex-shrink: 0; }

/* Cases */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: var(--card-bg); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-card); border: 1px solid rgba(15,23,42,.05); transition: transform .25s, box-shadow .25s; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.case-card.highlight { background: var(--deep-gradient); color: #fff; }
.case-card.highlight h3 { color: #fff; }
.case-card.highlight .case-desc { color: rgba(255,255,255,.75); }
.case-card.highlight .case-metric .metric-value { color: var(--accent-light); background: none; -webkit-text-fill-color: var(--accent-light); }
.case-logo { height: 48px; background: rgba(15,23,42,.05); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .875rem; color: var(--text-secondary); margin-bottom: 18px; }
.case-card.highlight .case-logo { background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); }
.case-tag { display: inline-block; font-size: .75rem; background: rgba(13,148,136,.1); color: var(--brand-mid); padding: 3px 12px; border-radius: var(--radius-pill); font-weight: 600; margin-bottom: 12px; }
.case-card.highlight .case-tag { background: rgba(255,255,255,.12); color: var(--brand-light); }
.case-card h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.case-desc { font-size: .875rem; color: var(--text-secondary); margin-bottom: 18px; }
.case-metric { display: flex; gap: 18px; flex-wrap: wrap; }
.case-metric .metric { text-align: left; }
.metric-value { font-size: 1.5rem; font-weight: 800; color: var(--accent); background: var(--accent-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
.metric-label { font-size: .75rem; color: var(--text-secondary); }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.pricing-card { background: var(--card-bg); border-radius: var(--radius-lg); padding: 32px 30px; box-shadow: var(--shadow-card); border: 1px solid rgba(15,23,42,.05); position: relative; transition: transform .25s, box-shadow .25s; }
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.pricing-card.recommended { border: 2px solid var(--brand-mid); }
.recommend-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent-gradient); color: #1F2937; font-size: .75rem; font-weight: 700; padding: 3px 16px; border-radius: var(--radius-pill); box-shadow: 0 4px 12px rgba(245,158,11,.3); }
.pricing-name { font-size: 1.125rem; font-weight: 700; color: var(--ink-dark); margin-bottom: 4px; }
.pricing-desc { font-size: .8125rem; color: var(--text-secondary); margin-bottom: 20px; }
.pricing-price { font-size: 2.25rem; font-weight: 800; color: var(--ink-dark); margin-bottom: 20px; line-height: 1.1; }
.pricing-price .unit { font-size: .9375rem; font-weight: 400; color: var(--text-secondary); margin-left: 4px; }
.pricing-features { list-style: none; padding: 0; margin: 0 0 24px; }
.pricing-features li { display: flex; align-items: flex-start; gap: 8px; padding: 7px 0; font-size: .875rem; color: var(--text-primary); }
.pricing-features li svg { width: 18px; height: 18px; stroke: var(--brand-mid); flex-shrink: 0; margin-top: 3px; }
.pricing-note { text-align: center; font-size: .8125rem; color: var(--text-secondary); margin-top: 20px; }

/* News */
.news-list { display: flex; flex-direction: column; gap: 18px; }
.news-item { display: flex; gap: 20px; background: var(--card-bg); border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-card); border: 1px solid rgba(15,23,42,.05); transition: transform .25s, box-shadow .25s; }
.news-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.news-thumb { flex-shrink: 0; width: 120px; height: 90px; border-radius: 12px; overflow: hidden; display: block; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .3s; }
.news-thumb:hover img { transform: scale(1.05); }
.news-body { flex: 1; min-width: 0; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.news-cat { background: rgba(13,148,136,.1); color: var(--brand-mid); font-size: .75rem; font-weight: 600; padding: 2px 10px; border-radius: var(--radius-pill); }
.news-date { font-size: .75rem; color: var(--text-secondary); }
.news-title { font-size: 1.0625rem; margin: 0 0 6px; }
.news-title a { color: var(--ink-dark); }
.news-title a:hover { color: var(--brand-mid); }
.news-summary { font-size: .8125rem; color: var(--text-secondary); margin: 0 0 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: .8125rem; font-weight: 600; color: var(--brand-mid); display: inline-flex; align-items: center; gap: 4px; }
.read-more:hover { gap: 8px; }
.news-empty {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  background: var(--card-bg);
}
.news-empty .empty-icon { width: 56px; height: 56px; border-radius: 50%; background: rgba(13,148,136,.08); display: inline-flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.news-empty .empty-icon svg { width: 28px; height: 28px; stroke: var(--brand-mid); }
.news-empty p { color: var(--text-secondary); font-size: .9375rem; margin: 0; }
.more-link { display: inline-flex; align-items: center; gap: 6px; font-size: .875rem; font-weight: 600; color: var(--brand-mid); }
.more-link:hover { gap: 10px; color: var(--brand-dark); }
.more-link svg { width: 16px; height: 16px; }

/* FAQ */
.faq-wrap { max-width: 850px; margin: 0 auto; }
.faq-card { background: var(--card-bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); border: 1px solid rgba(15,23,42,.05); overflow: hidden; }
.faq-item { border-bottom: 1px solid var(--border-color); }
.faq-item:last-child { border-bottom: none; }
.faq-item .accordion-button {
  background: transparent;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: none !important;
}
.faq-item .accordion-button::after { display: none; }
.faq-item .accordion-button .faq-plus { width: 28px; height: 28px; border-radius: 8px; background: rgba(13,148,136,.08); display: flex; align-items: center; justify-content: center; transition: transform .3s ease, background .3s ease; flex-shrink: 0; }
.faq-item .accordion-button .faq-plus svg { width: 14px; height: 14px; stroke: var(--brand-mid); transition: transform .3s ease; }
.faq-item .accordion-button:not(.collapsed) .faq-plus { background: var(--brand-mid); }
.faq-item .accordion-button:not(.collapsed) .faq-plus svg { stroke: #fff; transform: rotate(45deg); }
.faq-item .accordion-button:not(.collapsed) { color: var(--brand-dark); }
.faq-item .accordion-collapse { font-size: .9375rem; color: var(--text-secondary); line-height: 1.75; }
.faq-item .accordion-body { padding: 0 28px 22px 70px; }

/* CTA */
.cta-section { background: var(--deep-gradient); border-radius: 0; padding: clamp(3.5rem, 6vw, 5rem) 0; }
.cta-box { text-align: center; max-width: 720px; margin: 0 auto; }
.cta-box h2 { color: #fff; font-size: clamp(1.75rem, 3vw, 2.25rem); margin-bottom: 16px; }
.cta-box p { color: rgba(255,255,255,.75); font-size: 1rem; margin-bottom: 28px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-contact { margin-top: 24px; font-size: .875rem; color: rgba(255,255,255,.6); }
.cta-contact a { color: var(--brand-light); }

/* Footer */
.site-footer { background: var(--ink-dark); color: rgba(255,255,255,.7); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand .brand-text span { color: var(--brand-light); }
.footer-about { font-size: .875rem; line-height: 1.7; margin-bottom: 0; }
.footer-title { font-size: .9375rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,.6); font-size: .875rem; transition: color .2s, padding-left .2s; }
.footer-links a:hover { color: var(--brand-light); padding-left: 4px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: .875rem; margin-bottom: 12px; color: rgba(255,255,255,.6); }
.footer-contact li svg { width: 16px; height: 16px; stroke: var(--brand-light); flex-shrink: 0; margin-top: 5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; display: flex; align-items: center; justify-content: space-between; font-size: .8125rem; color: rgba(255,255,255,.4); }
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--brand-light); }

/* Section alt background */
.section-alt { background: #fff; }
.section-tint { background: linear-gradient(180deg, var(--page-bg) 0%, rgba(13,148,136,.03) 100%); }

/* Scroll snap card row */
.scroll-row { display: flex; gap: 24px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
.scroll-row > .case-card { scroll-snap-align: start; flex: 0 0 320px; }

/* Reveal animation */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.reveal { animation: fadeUp .8s ease both; }
.reveal-delay-1 { animation-delay: .1s; }
.reveal-delay-2 { animation-delay: .2s; }
.reveal-delay-3 { animation-delay: .3s; }

/* Responsive */
@media (max-width: 1199px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.feature-lg { grid-column: span 2; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { gap: 18px; }
}
@media (max-width: 991px) {
  .site-header .navbar-collapse {
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-card);
    margin-top: 12px;
    border: 1px solid rgba(15,23,42,.05);
  }
  .site-header .navbar-nav { gap: 4px; }
  .nav-actions { flex-direction: column; align-items: stretch; margin-top: 12px; gap: 10px; }
  .search-box { width: 100%; }
  .search-box input { width: 100%; }
  .hero-panel { display: none; }
  .stats-bar .container { grid-template-columns: repeat(2, 1fr); }
  .scenario-block { grid-template-columns: 1fr; gap: 24px; }
  .scenario-block.reverse .scenario-img { order: 1; }
  .scenario-block.reverse .scenario-content { order: 2; }
  .scenario-img img { height: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .news-item { flex-direction: column; }
  .news-thumb { width: 100%; height: 160px; }
}
@media (max-width: 767px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card.feature-lg { grid-column: span 1; }
  .cases-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .stats-bar .container { gap: 10px; }
  .stat-item { padding: 16px; }
  .scenario-wide { flex-direction: column; text-align: center; padding: 28px 20px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .faq-item .accordion-button { padding: 16px 18px; font-size: .9375rem; }
  .faq-item .accordion-body { padding: 0 18px 18px 52px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}
@media (max-width: 479px) {
  .stats-bar .container { grid-template-columns: 1fr 1fr; }
  .stat-number { font-size: 1.5rem; }
  .news-thumb { height: 120px; }
}

/* roulang page: article */
:root {
  --primary-dark: #0D9488;
  --primary: #14B8A6;
  --primary-light: #5EEAD4;
  --accent: #F59E0B;
  --accent-light: #FBBF24;
  --ink-dark: #0F172A;
  --ink-teal: #134E4A;
  --bg-body: #F5F7F6;
  --bg-card: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #64748B;
  --border-color: #E5E7EB;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.04), 0 10px 25px rgba(15,23,42,.06);
  --shadow-lg: 0 20px 45px rgba(15,23,42,.10);
  --gradient-brand: linear-gradient(135deg, #0D9488 0%, #14B8A6 55%, #5EEAD4 100%);
  --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
  --gradient-deep: linear-gradient(160deg, #0F172A 0%, #134E4A 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
}
a {
  color: var(--primary-dark);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--primary);
}
ul, ol {
  padding-left: 1.25rem;
}
.container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  border-radius: var(--radius-sm);
  font-weight: 600;
  padding: .75rem 1.5rem;
  transition: all .25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  gap: .5rem;
}
.btn-accent {
  background: var(--gradient-accent);
  color: #1F2937;
  border: none;
  box-shadow: 0 4px 14px rgba(245,158,11,.25);
}
.btn-accent:hover {
  filter: brightness(1.06);
  transform: translateY(-2px);
  color: #1F2937;
  box-shadow: 0 8px 22px rgba(245,158,11,.32);
}
.btn-accent:active {
  filter: brightness(.98);
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  border-radius: var(--radius-sm);
}
.btn-outline:hover {
  background: rgba(255,255,255,.10);
  border-color: #fff;
  color: #fff;
}
.btn-brand {
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  box-shadow: 0 4px 14px rgba(13,148,136,.25);
}
.btn-brand:hover {
  filter: brightness(1.05);
  transform: translateY(-2px);
  color: #fff;
}
.btn-lg {
  padding: .875rem 2rem;
  border-radius: 12px;
  font-size: 1.0625rem;
}
.btn-sm {
  padding: .5rem 1.25rem;
  font-size: .875rem;
}
.form-control {
  border-radius: var(--radius-sm);
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  padding: .625rem 1rem;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13,148,136,.15);
  background: #fff;
}
.text-muted {
  color: var(--text-muted) !important;
}
.section-padding {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255,255,255,.90);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15,23,42,.06);
}
.site-header .navbar {
  min-height: 64px;
  padding: 0;
}
.site-header .navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand-icon svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  fill: none;
}
.brand-text {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink-dark);
  line-height: 1;
}
.brand-text span {
  color: var(--primary-dark);
}
.site-header .navbar-nav {
  gap: 4px;
}
.site-header .nav-link {
  font-weight: 500;
  color: var(--text-main);
  padding: .625rem 1rem;
  border-radius: 8px;
  position: relative;
  transition: all .2s ease;
}
.site-header .nav-link:hover {
  color: var(--primary-dark);
  background: rgba(13,148,136,.08);
}
.site-header .nav-link.active {
  color: var(--primary-dark);
  font-weight: 600;
}
.site-header .nav-link.active::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: -2px;
  height: 2px;
  background: var(--primary-dark);
  border-radius: 2px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-body);
  border-radius: 8px;
  padding: 0 14px;
  border: 1px solid transparent;
  transition: all .2s ease;
  height: 40px;
}
.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(13,148,136,.12);
}
.search-box svg {
  width: 16px;
  height: 16px;
  stroke: var(--text-muted);
  flex-shrink: 0;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: .875rem;
  padding: 0 0 0 8px;
  width: 160px;
  color: var(--text-main);
}
.search-box input::placeholder {
  color: var(--text-muted);
}
.navbar-toggler {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border: none;
  background: transparent;
}
.navbar-toggler:focus {
  box-shadow: none;
}
.toggler-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .25s ease;
  margin: 0 auto;
}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(2) {
  opacity: 0;
}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.article-breadcrumb {
  padding-top: 36px;
  padding-bottom: 8px;
}
.breadcrumb-wrap {
  display: flex;
  align-items: center;
  font-size: .875rem;
  color: var(--text-muted);
}
.breadcrumb-wrap ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 4px;
}
.breadcrumb-wrap li {
  display: flex;
  align-items: center;
  gap: 4px;
}
.breadcrumb-wrap li + li::before {
  content: "/";
  color: #cbd5e1;
  margin: 0 6px;
}
.breadcrumb-wrap a {
  color: var(--text-muted);
}
.breadcrumb-wrap a:hover {
  color: var(--primary-dark);
}
.breadcrumb-wrap .active {
  color: var(--text-main);
  font-weight: 500;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-header {
  padding-top: 20px;
  padding-bottom: 8px;
}
.article-header-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.article-category-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(13,148,136,.10);
  color: var(--primary-dark);
  font-size: .8125rem;
  font-weight: 600;
  padding: .375rem 1rem;
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: .02em;
}
.article-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink-dark);
  margin: 0 0 16px;
  letter-spacing: -.01em;
}
.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  font-size: .875rem;
  color: var(--text-muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}
.article-meta-row .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta-row .meta-item svg {
  width: 15px;
  height: 15px;
  stroke: var(--text-muted);
}
.article-meta-row .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #cbd5e1;
}
.article-body {
  padding: 32px 0 24px;
}
.article-content {
  max-width: 780px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
  word-break: break-word;
}
.article-content p {
  margin-bottom: 1.5em;
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2em;
  margin-bottom: .75em;
  line-height: 1.3;
  color: var(--ink-dark);
  padding-bottom: .5em;
  border-bottom: 1px solid var(--border-color);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: .75em;
  line-height: 1.4;
  color: var(--ink-dark);
}
.article-content h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 1.25em;
  margin-bottom: .625em;
  color: var(--ink-dark);
}
.article-content ul, .article-content ol {
  margin-bottom: 1.5em;
  padding-left: 1.5rem;
}
.article-content li {
  margin-bottom: .5em;
}
.article-content img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(15,23,42,.08);
  margin: 1.75em auto;
}
.article-content figure {
  margin: 1.75em 0;
  text-align: center;
}
.article-content figcaption {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-top: .625rem;
  line-height: 1.5;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: #f0f7f6;
  padding: 1rem 1.5rem;
  border-radius: 0 12px 12px 0;
  margin: 1.5em 0;
  color: var(--text-muted);
  font-size: .9375rem;
  line-height: 1.7;
}
.article-content blockquote p:last-child {
  margin-bottom: 0;
}
.article-content a {
  color: var(--primary-dark);
  font-weight: 500;
  border-bottom: 1px solid rgba(13,148,136,.25);
  transition: border-color .2s ease;
}
.article-content a:hover {
  border-bottom-color: var(--primary-dark);
}
.article-content code {
  background: rgba(13,148,136,.08);
  color: var(--primary-dark);
  font-size: .875em;
  padding: .2em .45em;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.article-content pre {
  background: var(--ink-dark);
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: 12px;
  overflow-x: auto;
  font-size: .875rem;
  line-height: 1.6;
  margin: 1.5em 0;
}
.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: .875rem;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border-color);
  padding: .625rem .875rem;
  text-align: left;
}
.article-content table th {
  background: var(--bg-body);
  font-weight: 600;
}
.article-not-found {
  text-align: center;
  padding: 60px 24px;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  background: #fff;
  max-width: 780px;
  margin: 0 auto;
}
.article-not-found svg {
  width: 48px;
  height: 48px;
  stroke: var(--text-muted);
  margin-bottom: 16px;
}
.article-not-found h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--ink-dark);
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-muted);
  margin-bottom: 20px;
}
.article-tags {
  max-width: 780px;
  margin: 0 auto;
  padding: 24px 0 8px;
}
.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tags-row .tag-chip {
  display: inline-flex;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: .8125rem;
  padding: .375rem .875rem;
  border-radius: 999px;
  transition: all .2s ease;
}
.tags-row .tag-chip:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
  background: rgba(13,148,136,.04);
}
.related-posts {
  padding: 48px 0 24px;
}
.related-posts .section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
}
.related-posts .section-heading h2 {
  font-size: clamp(1.375rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--ink-dark);
  margin: 0;
}
.related-posts .section-heading .sub-title {
  font-size: .875rem;
  color: var(--text-muted);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(15,23,42,.05);
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.related-card .card-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: #e2e8f0;
}
.related-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}
.related-card:hover .card-img img {
  transform: scale(1.03);
}
.related-card .card-body {
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.related-card .card-cat {
  font-size: .75rem;
  font-weight: 600;
  color: var(--primary-dark);
  background: rgba(13,148,136,.10);
  padding: .25rem .625rem;
  border-radius: 999px;
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 10px;
}
.related-card h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink-dark);
  margin: 0 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .2s ease;
}
.related-card a:hover h3 {
  color: var(--primary-dark);
}
.related-card .card-meta {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}
.article-cta {
  padding: 48px 0 64px;
}
.article-cta-inner {
  background: var(--gradient-deep);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.article-cta-inner::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(94,234,212,.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.article-cta-inner .cta-text h2 {
  color: #fff;
  font-size: clamp(1.375rem, 2vw, 1.75rem);
  font-weight: 700;
  margin: 0 0 8px;
}
.article-cta-inner .cta-text p {
  color: rgba(255,255,255,.75);
  font-size: .9375rem;
  margin: 0;
}
.article-cta-inner .btn {
  flex-shrink: 0;
}
.site-footer {
  background: var(--ink-dark);
  color: rgba(255,255,255,.65);
  padding: 64px 0 28px;
  font-size: .875rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
}
.footer-brand .brand-text {
  color: #fff;
  font-size: 1.0625rem;
}
.footer-brand .brand-text span {
  color: var(--primary-light);
}
.footer-about {
  color: rgba(255,255,255,.55);
  line-height: 1.7;
  margin: 0;
  max-width: 320px;
}
.footer-title {
  color: #fff;
  font-size: .9375rem;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: .02em;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: rgba(255,255,255,.55);
  transition: color .2s ease, padding-left .2s ease;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.55);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  stroke: var(--primary-light);
  flex-shrink: 0;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  color: rgba(255,255,255,.35);
  font-size: .8125rem;
}
.footer-bottom a {
  color: rgba(255,255,255,.35);
}
.footer-bottom a:hover {
  color: #fff;
}
@media (max-width: 991.98px) {
  .site-header .navbar-collapse {
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    margin-top: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }
  .site-header .navbar-nav {
    gap: 4px;
    margin-bottom: 16px !important;
  }
  .site-header .nav-link.active::after {
    display: none;
  }
  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .search-box {
    width: 100%;
  }
  .search-box input {
    flex: 1;
    width: auto;
  }
  .nav-actions .btn {
    width: 100%;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767.98px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .site-header .navbar {
    min-height: 56px;
  }
  .breadcrumb-wrap .active {
    max-width: 160px;
  }
  .article-header h1 {
    font-size: 1.625rem;
  }
  .article-meta-row {
    gap: 8px 14px;
  }
  .article-cta-inner {
    padding: 32px 20px;
    flex-direction: column;
    text-align: center;
  }
  .article-cta-inner .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 575.98px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card .card-img {
    aspect-ratio: 21/10;
  }
  .article-content {
    font-size: .9625rem;
  }
  .article-content h2 {
    font-size: 1.3125rem;
  }
  .article-content blockquote {
    padding: .875rem 1.125rem;
  }
  .article-cta-inner {
    padding: 28px 16px;
  }
}

/* roulang page: category1 */
:root{
  --primary-dark:#0D9488;
  --primary:#14B8A6;
  --primary-light:#5EEAD4;
  --accent:#F59E0B;
  --accent-light:#FBBF24;
  --ink:#0F172A;
  --ink-deep:#134E4A;
  --page-bg:#F5F7F6;
  --card-bg:#FFFFFF;
  --text:#1F2937;
  --text-muted:#64748B;
  --border:#E5E7EB;
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(15,23,42,.04),0 10px 25px rgba(15,23,42,.06);
  --shadow-lg:0 20px 45px rgba(15,23,42,.10);
  --grad-brand:linear-gradient(135deg,#0D9488 0%,#14B8A6 55%,#5EEAD4 100%);
  --grad-accent:linear-gradient(135deg,#F59E0B 0%,#FBBF24 100%);
  --grad-deep:linear-gradient(160deg,#0F172A 0%,#134E4A 100%);
  --font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-stack);
  background:var(--page-bg);
  color:var(--text);
  font-size:0.9375rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:color .2s ease}
ul,ol{list-style:none}
input,button,textarea{font-family:inherit}
.container{max-width:1200px;padding-left:24px;padding-right:24px}
@media(max-width:768px){
  .container{padding-left:16px;padding-right:16px}
}
.section-pad{padding:clamp(3.5rem,7vw,5.5rem) 0}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.75rem 1.5rem;border-radius:10px;font-weight:600;
  font-size:.9375rem;line-height:1.4;border:1px solid transparent;
  transition:all .25s ease;cursor:pointer;gap:.5rem;
}
.btn-accent{
  background:var(--grad-accent);color:#1F2937;border-color:transparent;
  box-shadow:0 4px 14px rgba(245,158,11,.25);
}
.btn-accent:hover{
  filter:brightness(1.06);transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(245,158,11,.3);color:#1F2937;
}
.btn-accent:active{transform:translateY(0);filter:brightness(.98)}
.btn-brand{
  background:var(--grad-brand);color:#fff;border-color:transparent;
  box-shadow:0 4px 14px rgba(13,148,136,.25);
}
.btn-brand:hover{
  transform:translateY(-2px);box-shadow:0 8px 22px rgba(13,148,136,.32);color:#fff;
}
.btn-outline{
  background:transparent;border:1px solid var(--primary);color:var(--primary);
}
.btn-outline:hover{background:rgba(13,148,136,.06);transform:translateY(-2px);color:var(--primary-dark)}
.btn-ghost{
  background:transparent;border:1px solid rgba(255,255,255,.4);color:#fff;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;transform:translateY(-2px)}
.btn-lg-c{padding:.875rem 2rem;border-radius:12px;font-size:1.0625rem;min-height:48px}
.btn-sm-c{padding:.5rem 1.25rem;font-size:.875rem;min-height:40px}
@media(max-width:768px){
  .btn{padding:.625rem 1.25rem;font-size:.875rem}
}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(15,23,42,.06);
  box-shadow:0 2px 12px rgba(15,23,42,.03);
}
.site-header .navbar{
  min-height:64px;padding:0;
}
@media(max-width:992px){
  .site-header .navbar{min-height:56px}
}
.navbar-brand{
  display:flex;align-items:center;gap:.625rem;padding:0;
}
.brand-icon{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,#0D9488,#14B8A6 60%,#5EEAD4);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(13,148,136,.28);
  flex-shrink:0;
}
.brand-icon svg{width:20px;height:20px;stroke:#fff}
.brand-text{
  font-size:1.25rem;font-weight:700;color:var(--text);letter-spacing:-.01em;
}
.brand-text span{
  color:var(--primary);font-weight:700;
}
.navbar-nav{gap:2px}
.navbar-nav .nav-link{
  padding:.5rem .875rem;font-size:.9375rem;font-weight:500;color:var(--text);
  border-radius:8px;position:relative;transition:all .2s ease;
}
.navbar-nav .nav-link:hover{
  color:var(--primary);background:rgba(13,148,136,.06);
}
.navbar-nav .nav-link.active{
  color:var(--primary);font-weight:600;
}
.navbar-nav .nav-link.active::after{
  content:"";position:absolute;left:.875rem;right:.875rem;bottom:-1px;
  height:2px;background:var(--primary);border-radius:2px;
}
.nav-actions{
  display:flex;align-items:center;gap:.75rem;
}
.search-box{
  display:flex;align-items:center;gap:.5rem;
  background:var(--page-bg);border-radius:8px;
  padding:.375rem .75rem;width:200px;
  border:1px solid transparent;transition:border-color .2s ease;
}
.search-box:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(13,148,136,.12);
}
.search-box svg{width:16px;height:16px;stroke:var(--text-muted);flex-shrink:0}
.search-box input{
  border:none;outline:none;background:transparent;width:100%;
  font-size:.875rem;color:var(--text);
}
.search-box input::placeholder{color:var(--text-muted)}
/* Toggler */
.navbar-toggler{
  border:none;background:transparent;padding:.5rem;display:flex;flex-direction:column;gap:4px;
  width:42px;height:42px;align-items:center;justify-content:center;
}
.toggler-bar{
  width:22px;height:2px;background:var(--text);border-radius:2px;
  transition:all .3s ease;
}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(2){opacity:0}
.navbar-toggler[aria-expanded="true"] .toggler-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(max-width:991.98px){
  .navbar-collapse{
    background:var(--card-bg);
    border-top:1px solid var(--border);
    padding:1rem 0 1.25rem;
    border-radius:0 0 16px 16px;
    box-shadow:0 16px 30px rgba(15,23,42,.08);
  }
  .navbar-nav{gap:.25rem;margin-bottom:.75rem}
  .navbar-nav .nav-link{padding:.625rem .875rem}
  .nav-actions{flex-direction:column;align-items:stretch;gap:.5rem}
  .search-box{width:100%}
  .nav-actions .btn{width:100%}
}

/* ===== Page Hero ===== */
.page-hero{
  background:linear-gradient(180deg,#F8FAF9 0%,#EEF4F3 100%);
  padding:3.5rem 0 4rem;
  position:relative;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;top:-80px;right:-60px;width:320px;height:320px;
  background:radial-gradient(circle,rgba(94,234,212,.18) 0%,rgba(94,234,212,0) 70%);
  border-radius:50%;pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;bottom:-120px;left:-80px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(245,158,11,.1) 0%,rgba(245,158,11,0) 70%);
  border-radius:50%;pointer-events:none;
}
.breadcrumb{
  margin-bottom:1.5rem;padding:.375rem 0;display:flex;flex-wrap:wrap;align-items:center;
  font-size:.8125rem;color:var(--text-muted);gap:.25rem;
}
.breadcrumb li{display:flex;align-items:center;gap:.25rem}
.breadcrumb li+li::before{
  content:"/";margin:0 .375rem;color:var(--border);font-weight:400;
}
.breadcrumb a{color:var(--text-muted);transition:color .2s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .active{color:var(--text);font-weight:500}
.page-hero-inner{
  display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center;
  position:relative;z-index:1;
}
.page-hero-text h1{
  font-size:clamp(2rem,4vw,2.875rem);font-weight:700;line-height:1.2;
  color:var(--ink);letter-spacing:-.01em;margin-bottom:1rem;
}
.page-hero-text h1 .brand-highlight{
  background:var(--grad-brand);-webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.page-hero-text .hero-desc{
  font-size:1.0625rem;color:var(--text-muted);line-height:1.75;margin-bottom:1.75rem;
  max-width:520px;
}
.hero-actions{
  display:flex;gap:.875rem;flex-wrap:wrap;
}
.page-hero-visual{
  position:relative;
}
.page-hero-visual img{
  border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
  width:100%;object-fit:cover;aspect-ratio:4/3;
}
.page-hero-visual::after{
  content:"";position:absolute;inset:auto -16px -16px auto;width:60%;height:60%;
  background:var(--grad-accent);border-radius:var(--radius-lg);opacity:.12;z-index:-1;
}
@media(max-width:991.98px){
  .page-hero-inner{grid-template-columns:1fr;gap:2rem}
  .page-hero-visual{display:none}
  .page-hero{padding:2.5rem 0 3rem}
}

/* ===== Intro Section ===== */
.intro-section{
  padding:clamp(3.5rem,7vw,5.5rem) 0;
  background:var(--card-bg);
}
.intro-grid{
  display:grid;grid-template-columns:1fr 1.1fr;gap:3.5rem;align-items:center;
}
.intro-image img{
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);object-fit:cover;
  aspect-ratio:4/3;width:100%;
}
.intro-content .section-tag{
  display:inline-block;padding:.25rem .875rem;border-radius:999px;
  background:rgba(13,148,136,.1);color:var(--primary-dark);
  font-size:.8125rem;font-weight:600;margin-bottom:1rem;
}
.intro-content h2{
  font-size:clamp(1.5rem,2.5vw,2rem);font-weight:700;color:var(--ink);
  line-height:1.3;margin-bottom:1rem;letter-spacing:-.01em;
}
.intro-content p{
  color:var(--text-muted);font-size:.9375rem;line-height:1.75;margin-bottom:1.5rem;
}
.check-list{
  display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.75rem;
}
.check-list li{
  display:flex;align-items:flex-start;gap:.625rem;font-size:.9375rem;color:var(--text);
}
.check-list li svg{
  width:20px;height:20px;flex-shrink:0;margin-top:2px;
  stroke:var(--primary);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
}
@media(max-width:991.98px){
  .intro-grid{grid-template-columns:1fr;gap:2rem}
}

/* ===== Category / Product Grid ===== */
.category-section{
  padding:clamp(3.5rem,7vw,5.5rem) 0;
  background:var(--page-bg);
}
.section-head{
  text-align:center;max-width:620px;margin:0 auto 3rem;
}
.section-head .section-tag{
  display:inline-block;padding:.25rem .875rem;border-radius:999px;
  background:rgba(13,148,136,.1);color:var(--primary-dark);
  font-size:.8125rem;font-weight:600;margin-bottom:.75rem;
}
.section-head h2{
  font-size:clamp(1.5rem,2.5vw,2rem);font-weight:700;color:var(--ink);
  line-height:1.3;margin-bottom:.625rem;letter-spacing:-.01em;
}
.section-head p{
  color:var(--text-muted);font-size:.875rem;line-height:1.6;
}
.category-grid{
  display:grid;grid-template-columns:.9fr 1.1fr;grid-template-rows:auto auto;gap:24px;
}
.category-card{
  background:var(--card-bg);border-radius:var(--radius-lg);
  border:1px solid rgba(15,23,42,.05);
  padding:2rem;box-shadow:var(--shadow-sm);
  transition:all .3s ease;
  position:relative;overflow:hidden;
}
.category-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-lg);
  border-color:rgba(13,148,136,.25);
}
.category-card-large{
  grid-row:span 2;display:flex;flex-direction:column;
  background:linear-gradient(150deg,#FFFFFF 0%,#F0FAF8 100%);
}
.category-card-large::before{
  content:"";position:absolute;top:0;left:0;width:4px;height:100%;
  background:var(--grad-brand);
}
.category-card .card-icon{
  width:52px;height:52px;border-radius:14px;
  background:rgba(13,148,136,.1);display:inline-flex;align-items:center;justify-content:center;
  margin-bottom:1.25rem;
}
.category-card .card-icon svg{
  width:26px;height:26px;stroke:var(--primary);fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round;
}
.category-card h3{
  font-size:1.25rem;font-weight:600;color:var(--ink);margin-bottom:.75rem;
}
.category-card p{
  color:var(--text-muted);font-size:.875rem;line-height:1.7;margin-bottom:1.25rem;
}
.category-card ul{
  display:flex;flex-direction:column;gap:.5rem;margin-bottom:1.5rem;
}
.category-card ul li{
  display:flex;align-items:flex-start;gap:.5rem;
  font-size:.875rem;color:var(--text);line-height:1.5;
}
.category-card ul li svg{
  width:18px;height:18px;flex-shrink:0;margin-top:2px;
  stroke:var(--accent);fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;
}
.card-link{
  display:inline-flex;align-items:center;gap:.375rem;
  font-size:.875rem;font-weight:600;color:var(--primary);
  margin-top:auto;transition:gap .2s ease;
}
.card-link:hover{gap:.625rem;color:var(--primary-dark)}
.card-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:991.98px){
  .category-grid{grid-template-columns:1fr 1fr;grid-template-rows:auto auto}
  .category-card-large{grid-row:span 1}
}
@media(max-width:767.98px){
  .category-grid{grid-template-columns:1fr}
}

/* ===== Stats ===== */
.stats-section{
  padding:clamp(3rem,6vw,4.5rem) 0;
  background:var(--grad-deep);
  position:relative;overflow:hidden;
}
.stats-section::before{
  content:"";position:absolute;top:0;left:0;right:0;bottom:0;
  background-image:radial-gradient(circle at 80% 20%,rgba(94,234,212,.08) 0%,transparent 45%);
  pointer-events:none;
}
.stats-section .section-head h2{color:#fff}
.stats-section .section-head p{color:rgba(255,255,255,.7)}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1;
}
.stat-item{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-md);
  padding:1.75rem 1.5rem;text-align:center;
  backdrop-filter:blur(8px);
  transition:transform .3s ease,background .3s ease;
}
.stat-item:hover{
  transform:translateY(-4px);background:rgba(255,255,255,.1);
}
.stat-num{
  font-size:clamp(1.75rem,3vw,2.5rem);font-weight:800;
  background:var(--grad-accent);-webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;line-height:1.15;
}
.stat-label{
  margin-top:6px;font-size:.8125rem;color:rgba(255,255,255,.75);
}
@media(max-width:991.98px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:575.98px){
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}
}

/* ===== Process ===== */
.process-section{
  padding:clamp(3.5rem,7vw,5.5rem) 0;
  background:var(--card-bg);
}
.process-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:2.5rem;
}
.process-step{
  position:relative;padding:1.5rem;border-radius:var(--radius-md);
  background:var(--page-bg);border:1px solid var(--border);
  transition:all .3s ease;
}
.process-step:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-sm);
  border-color:rgba(13,148,136,.25);
}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--grad-brand);color:#fff;font-weight:700;font-size:1.125rem;
  margin-bottom:1rem;box-shadow:0 4px 10px rgba(13,148,136,.25);
}
.process-step h3{
  font-size:1.0625rem;font-weight:600;color:var(--ink);margin-bottom:.5rem;
}
.process-step p{
  font-size:.875rem;color:var(--text-muted);line-height:1.6;
}
.process-step:not(:last-child)::after{
  content:"";position:absolute;top:50%;right:-24px;width:24px;height:2px;
  background:linear-gradient(90deg,var(--primary),transparent);
  transform:translateY(-50%);
}
@media(max-width:991.98px){
  .process-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .process-step:not(:last-child)::after{display:none}
}
@media(max-width:575.98px){
  .process-grid{grid-template-columns:1fr}
}

/* ===== FAQ ===== */
.faq-section{
  padding:clamp(3.5rem,7vw,5.5rem) 0;
  background:var(--page-bg);
}
.accordion{
  max-width:820px;margin:0 auto;--bs-accordion-border-color:var(--border);
  --bs-accordion-border-radius:16px;
  --bs-accordion-inner-border-radius:16px;
}
.accordion-item{
  border:1px solid rgba(15,23,42,.06);border-radius:16px !important;
  background:var(--card-bg);box-shadow:var(--shadow-sm);
  overflow:hidden;margin-bottom:14px;
  transition:border-color .25s ease;
}
.accordion-item:not(:first-of-type){border:1px solid rgba(15,23,42,.06)}
.accordion-item:has(.accordion-button:not(.collapsed)){
  border-color:rgba(13,148,136,.35);
}
.accordion-button{
  background:var(--card-bg);color:var(--text);
  font-size:1rem;font-weight:600;padding:1.25rem 1.5rem;
  box-shadow:none;border:none;border-radius:16px !important;
  transition:color .2s ease;
}
.accordion-button:not(.collapsed){
  background:var(--card-bg);color:var(--primary-dark);
  box-shadow:none;
}
.accordion-button:focus{
  box-shadow:0 0 0 3px rgba(13,148,136,.12);
}
.accordion-button::after{
  background-image:none;content:"+";
  display:inline-flex;align-items:center;justify-content:center;
  font-size:1.5rem;font-weight:300;color:var(--primary);
  width:24px;height:24px;transition:transform .25s ease;
  line-height:1;
}
.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);color:var(--primary-dark);
}
.accordion-body{
  padding:0 1.5rem 1.25rem;color:var(--text-muted);
  font-size:.9375rem;line-height:1.75;
}

/* ===== CTA ===== */
.cta-section{
  padding:clamp(3.5rem,7vw,5.5rem) 0;
  background:var(--grad-deep);
  position:relative;overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;top:0;left:0;right:0;bottom:0;
  background-image:radial-gradient(circle at 15% 85%,rgba(245,158,11,.15) 0%,transparent 40%),
  radial-gradient(circle at 85% 20%,rgba(94,234,212,.12) 0%,transparent 40%);
  pointer-events:none;
}
.cta-inner{
  max-width:680px;margin:0 auto;text-align:center;
  color:#fff;position:relative;z-index:1;
}
.cta-inner h2{
  font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;line-height:1.3;
  margin-bottom:1rem;
}
.cta-inner p{
  color:rgba(255,255,255,.8);font-size:1rem;line-height:1.75;
  margin-bottom:2rem;
}
.cta-actions{
  display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;
}
.cta-contact{
  margin-top:1.5rem;display:flex;justify-content:center;gap:2rem;flex-wrap:wrap;
  font-size:.875rem;color:rgba(255,255,255,.65);
}
.cta-contact span{
  display:inline-flex;align-items:center;gap:.5rem;
}
.cta-contact svg{
  width:16px;height:16px;stroke:rgba(255,255,255,.8);fill:none;
  stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
}

/* ===== Footer ===== */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.7);
  padding:3.5rem 0 0;
  font-size:.875rem;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr .8fr .8fr 1.1fr;
  gap:2.5rem;padding-bottom:2.5rem;
}
.footer-brand{
  display:flex;align-items:center;gap:.625rem;margin-bottom:1rem;
}
.footer-brand .brand-text{
  color:#fff;font-size:1.125rem;
}
.footer-brand .brand-text span{color:var(--primary-light)}
.footer-about{
  color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:0;
}
.footer-title{
  color:#fff;font-size:.9375rem;font-weight:600;margin-bottom:1rem;
}
.footer-links{
  display:flex;flex-direction:column;gap:.5rem;
}
.footer-links a{
  color:rgba(255,255,255,.65);transition:color .2s ease,transform .2s ease;
  display:inline-flex;align-items:center;gap:.25rem;
}
.footer-links a:hover{
  color:var(--primary-light);transform:translateX(3px);
}
.footer-contact{
  display:flex;flex-direction:column;gap:.625rem;
}
.footer-contact li{
  display:flex;align-items:flex-start;gap:.5rem;
  color:rgba(255,255,255,.65);line-height:1.5;
}
.footer-contact svg{
  width:16px;height:16px;flex-shrink:0;margin-top:3px;
  stroke:var(--primary-light);fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:1.25rem 0;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.5rem;
}
.footer-bottom p{
  margin-bottom:0;font-size:.8125rem;color:rgba(255,255,255,.45);
}
@media(max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:2rem}
}
@media(max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;gap:1.5rem}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* ===== Reveal animation (light) ===== */
.fade-up{
  opacity:0;transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.fade-up.visible{
  opacity:1;transform:translateY(0);
}
@media(prefers-reduced-motion:reduce){
  .fade-up{opacity:1;transform:none;transition:none}
}

/* ===== Focus visibility ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;
}