/* roulang page: index */
:root {
  --bg: #070B14;
  --bg-deep: #0D1420;
  --card-bg: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.10);
  --text-main: #E4EDF5;
  --text-secondary: #8B9AB0;
  --text-tertiary: #5C6B82;
  --accent: #2EE6C3;
  --accent-blue: #56CCF2;
  --amber: #FFB84D;
  --divider: rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.4);
  --transition: all .25s ease;
  --font: "MiSans","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-main);
  background-color: var(--bg);
  background-image:
    radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; border: none; outline: none; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.section { padding: 96px 0; position: relative; }
.section-header { margin-bottom: 56px; max-width: 720px; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--accent);
  padding: 6px 16px;
  border: 1px dashed rgba(46,230,195,0.45);
  border-radius: 999px;
  margin-bottom: 16px;
}
.section-tag .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.section-title { font-size: 32px; font-weight: 600; line-height: 1.35; letter-spacing: -0.02em; color: var(--text-main); }
.section-desc { margin-top: 14px; font-size: 16px; color: var(--text-secondary); line-height: 1.8; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #062A24;
  box-shadow: 0 0 20px rgba(46,230,195,0.3);
}
.btn-primary:hover {
  box-shadow: 0 0 32px rgba(46,230,195,0.5);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.btn-ghost:hover {
  border-color: rgba(46,230,195,0.5);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: translateY(0); }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-top: 24px;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(7,11,20,0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding-top: 0;
  box-shadow: 0 1px 0 var(--divider);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text-main);
  white-space: nowrap;
}
.logo-mark {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(46,230,195,0.6);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  position: relative;
  padding: 10px 20px;
  font-size: 15px;
  color: #B0BED0;
  border-radius: 999px;
  transition: var(--transition);
}
.nav-link:hover { color: #fff; }
.nav-link.active { color: #fff; }
.nav-link.active::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(46,230,195,0.5);
}
.nav-divider {
  width: 60px;
  height: 1px;
  background: var(--card-border);
}
.nav-cta {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  font-size: 14px;
  color: var(--text-main);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover { border-color: var(--accent); color: var(--accent); }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(7,11,20,0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
.mobile-menu.open { opacity: 1; pointer-events: auto; }
.mobile-link {
  font-size: 22px;
  color: var(--text-main);
  padding: 12px 24px;
  transition: var(--transition);
}
.mobile-link:hover, .mobile-link.active { color: var(--accent); }
.mobile-divider { width: 40px; height: 1px; background: var(--divider); margin: 8px 0; }

/* Hero */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  background:
    radial-gradient(ellipse 600px 420px at 15% 25%, rgba(27,58,107,0.45), transparent),
    radial-gradient(ellipse 700px 500px at 85% 70%, rgba(46,230,195,0.07), transparent),
    linear-gradient(180deg, rgba(7,11,20,0.55), rgba(7,11,20,0.92)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--accent);
  letter-spacing: .14em;
  margin-bottom: 24px;
}
.hero-eyebrow::before { content: ''; width: 32px; height: 1px; background: var(--accent); }
.hero-title {
  font-size: 52px;
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 20px;
}
.hero-title .accent-text { color: var(--accent); }
.hero-sub {
  font-size: 17px;
  line-height: 1.9;
  color: #B0BED0;
  max-width: 640px;
  margin-bottom: 36px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-tertiary);
  letter-spacing: .03em;
}
.hero-meta .split { width: 4px; height: 4px; border-radius: 50%; background: var(--text-tertiary); }

/* Value Section */
.value-section { background: var(--bg); }
.value-layout {
  display: flex;
  align-items: center;
  gap: 64px;
}
.value-text { flex: 1; font-size: 17px; line-height: 2; color: #B0BED0; }
.value-text strong { color: var(--text-main); font-weight: 600; }
.value-data {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-data .data-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  text-align: center;
  transition: var(--transition);
}
.value-data .data-item:hover {
  border-color: rgba(46,230,195,0.35);
  transform: translateY(-4px);
}
.data-num {
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.data-unit { font-size: 15px; color: var(--accent); margin-left: 2px; }
.data-label { margin-top: 6px; font-size: 13px; color: var(--text-secondary); }

/* Features */
.features-section { background: var(--bg-deep); position: relative; }
.features-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 500px 300px at 80% 10%, rgba(46,230,195,0.04), transparent);
  pointer-events: none;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition);
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46,230,195,0.4), transparent);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,230,195,0.35);
  transform: translateY(-4px);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(46,230,195,0.08);
  border: 1px solid rgba(46,230,195,0.2);
  margin-bottom: 24px;
}
.feature-icon svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature-badge2 {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--amber);
  border: 1px solid rgba(255,184,77,0.3);
  padding: 3px 10px;
  border-radius: 999px;
}
.feature-title { font-size: 19px; font-weight: 600; margin-bottom: 12px; color: var(--text-main); }
.feature-desc { font-size: 14px; line-height: 1.75; color: var(--text-secondary); margin-bottom: 24px; }
.feature-link {
  font-size: 14px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.feature-link .arrow { transition: transform .25s ease; }
.feature-link:hover .arrow { transform: translateX(4px); }
.feature-divider {
  width: 100%;
  height: 1px;
  background: var(--divider);
  margin: 0 0 16px;
}

/* Scenes */
.scenes-section { background: var(--bg); }
.scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.scene-card {
  display: flex;
  min-height: 260px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.scene-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(46,230,195,0.3); transform: translateY(-4px); }
.scene-img {
  flex: 0 0 40%;
  position: relative;
  overflow: hidden;
}
.scene-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.scene-card:hover .scene-img img { transform: scale(1.05); }
.scene-body { padding: 28px; display: flex; flex-direction: column; justify-content: center; }
.scene-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--accent);
  background: rgba(46,230,195,0.08);
  border: 1px solid rgba(46,230,195,0.2);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  align-self: flex-start;
}
.scene-title { font-size: 20px; font-weight: 600; color: var(--text-main); margin-bottom: 10px; }
.scene-desc { font-size: 14px; line-height: 1.75; color: var(--text-secondary); margin-bottom: 16px; }
.scene-link { font-size: 14px; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.scene-link:hover .arrow { transform: translateX(4px); }
.scene-link .arrow { transition: transform .25s ease; }

/* Cases */
.cases-section {
  background: var(--bg-deep);
  border-radius: 0;
  position: relative;
}
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.case-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,230,195,0.35);
  transform: translateY(-4px);
}
.case-img { height: 150px; overflow: hidden; position: relative; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(7,11,20,0.5));
}
.case-body { padding: 24px 28px 28px; display: flex; flex-direction: column; flex: 1; }
.case-tag {
  font-size: 12px;
  color: var(--accent-blue);
  letter-spacing: .1em;
  margin-bottom: 8px;
}
.case-title { font-size: 18px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; line-height: 1.5; }
.case-result { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.case-result strong { color: var(--accent); font-weight: 600; }
.case-link { font-size: 14px; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; margin-top: auto; }
.case-link:hover .arrow { transform: translateX(4px); }
.case-link .arrow { transition: transform .25s ease; }

/* Pricing */
.pricing-section { background: var(--bg); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.pricing-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition);
}
.pricing-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(46,230,195,0.35); transform: translateY(-4px); }
.pricing-card.recommended {
  border-color: rgba(46,230,195,0.6);
  box-shadow: 0 0 40px rgba(46,230,195,0.08);
  margin-top: -20px;
  padding-bottom: 48px;
}
.pricing-recommend-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--amber);
  color: #1A1405;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 4px 16px;
  border-radius: 999px;
  white-space: nowrap;
}
.pricing-name { font-size: 20px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; }
.pricing-audience { font-size: 13px; color: var(--text-secondary); margin-bottom: 24px; }
.pricing-price {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 28px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.pricing-price small { font-size: 14px; font-weight: 400; color: var(--text-tertiary); margin-left: 4px; }
.pricing-feats { list-style: none; margin-bottom: 32px; display: grid; gap: 12px; }
.pricing-feat { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: #B0BED0; line-height: 1.6; }
.pricing-feat .check {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border: 1px solid rgba(46,230,195,0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  color: var(--accent);
  font-size: 10px;
}
.pricing-cta { width: 100%; }

/* News */
.news-section { background: var(--bg-deep); position: relative; }
.news-list { display: grid; gap: 12px; }
.news-card {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 24px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  transition: var(--transition);
}
.news-card:hover {
  border-color: rgba(46,230,195,0.35);
  background: rgba(46,230,195,0.04);
  transform: translateX(6px);
}
.news-meta { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.news-cat {
  font-size: 12px;
  color: var(--accent);
  border: 1px solid rgba(46,230,195,0.25);
  padding: 2px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.news-date { font-size: 13px; color: var(--text-tertiary); white-space: nowrap; }
.news-title { font-size: 16px; font-weight: 600; color: var(--text-main); flex: 1; line-height: 1.5; transition: color .2s ease; }
.news-card:hover .news-title { color: var(--accent); }
.news-summary {
  font-size: 13px;
  color: var(--text-secondary);
  flex: 0 0 32%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-arrow { color: var(--accent); font-size: 16px; flex: 0 0 auto; transition: transform .25s ease; }
.news-card:hover .news-arrow { transform: translateX(4px); }
.news-empty {
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 15px;
}
.news-empty::before {
  content: '';
  display: block;
  width: 40px;
  height: 40px;
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 50%;
  margin: 0 auto 16px;
}

/* FAQ */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 800px; }
.faq-item { border-bottom: 1px solid var(--divider); }
.faq-item:first-child { border-top: 1px solid var(--divider); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  background: none;
  color: var(--text-main);
  font-size: 18px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: color .25s ease;
}
.faq-question:hover { color: var(--accent); }
.faq-toggle {
  position: relative;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}
.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  background: var(--accent);
  border-radius: 2px;
  transition: transform .3s ease;
}
.faq-toggle::before { width: 20px; height: 2px; top: 9px; left: 0; }
.faq-toggle::after { width: 2px; height: 20px; top: 0; left: 9px; }
.faq-item.open .faq-toggle::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer-inner {
  padding: 0 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 680px;
}

/* CTA */
.cta-section { padding: 96px 0 120px; background: var(--bg); }
.cta-box {
  position: relative;
  border-radius: 24px;
  padding: 60px 32px;
  text-align: center;
  background:
    radial-gradient(ellipse 400px 260px at 50% 50%, rgba(46,230,195,0.12), transparent),
    var(--bg-deep);
  border: 1px solid var(--card-border);
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46,230,195,0.5), transparent);
}
.cta-title { font-size: 32px; font-weight: 650; color: var(--text-main); margin-bottom: 12px; letter-spacing: -0.02em; }
.cta-sub { font-size: 16px; color: var(--text-secondary); margin-bottom: 36px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* Footer */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--divider); }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 32px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 56px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.8; max-width: 360px; }
.footer-col-title { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 16px; letter-spacing: .04em; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-secondary); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 6px; }
.footer-contact { display: grid; gap: 10px; font-size: 14px; color: var(--text-secondary); }
.footer-contact .contact-item { display: flex; gap: 10px; align-items: center; }
.contact-icon { width: 16px; height: 16px; color: var(--accent); flex: 0 0 auto; }
.footer-bottom {
  border-top: 1px solid var(--divider);
  padding: 20px 32px;
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.recommended { margin-top: 0; }
  .value-layout { flex-direction: column; }
  .value-data { width: 100%; grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .nav-links, .nav-divider, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .header-inner { padding: 0 20px; }
  .section { padding: 64px 0; }
  .hero { padding: 140px 0 64px; min-height: auto; }
  .hero-title { font-size: 36px; }
  .section-title { font-size: 26px; }
  .section-header { margin-bottom: 40px; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .scene-card { flex-direction: column; }
  .scene-img { flex: 0 0 auto; height: 180px; }
  .case-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .pricing-card.recommended { margin-top: 0; order: -1; }
  .news-card { flex-direction: column; align-items: flex-start; gap: 8px; }
  .news-summary { flex: none; width: 100%; white-space: normal; }
  .news-arrow { display: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { padding: 16px 20px; }
  .cta-box { padding: 48px 20px; }
}
@media (max-width: 520px) {
  .container { padding: 0 20px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .value-data { grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
  .data-num { font-size: 28px; }
  .data-label { font-size: 12px; }
  .btn { width: 100%; }
  .scene-body { padding: 20px; }
  .feature-card { padding: 24px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* roulang page: article */
:root {
  --bg-base: #070B14;
  --bg-secondary: #0D1420;
  --bg-elevated: #0C1322;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.10);
  --text-primary: #E4EDF5;
  --text-secondary: #8B9AB0;
  --text-muted: #5C6B82;
  --accent: #2EE6C3;
  --accent-secondary: #56CCF2;
  --warning: #FFB84D;
  --divider: rgba(255, 255, 255, 0.08);
  --radius-card: 16px;
  --radius-btn: 8px;
  --shadow-default: 0 8px 30px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.4);
  --font-main: "MiSans", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(27, 58, 107, 0.30) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
  position: relative;
  z-index: 1;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  z-index: 200;
  background: transparent;
  transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  line-height: 1;
}

.logo-mark {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 12px rgba(46, 230, 195, 0.5);
  flex-shrink: 0;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
}

.nav-link {
  position: relative;
  padding: 0 20px;
  font-size: 15px;
  color: #B0BED0;
  line-height: 1;
  transition: color 0.25s ease;
}

.nav-link::before {
  content: "";
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.nav-link:hover {
  color: #FFFFFF;
}

.nav-link:hover::before {
  opacity: 1;
}

.nav-link.active {
  color: #FFFFFF;
}

.nav-link.active::before {
  opacity: 1;
}

.nav-divider {
  width: 60px;
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  margin: 0 8px;
}

.nav-cta {
  padding: 9px 22px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-btn);
  font-size: 14px;
  color: var(--text-primary);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.nav-cta:hover {
  border-color: rgba(46, 230, 195, 0.6);
  background: rgba(46, 230, 195, 0.08);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 160px 0 72px;
  background:
    linear-gradient(rgba(7, 11, 20, 0.88), rgba(7, 11, 20, 0.94)),
    url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  border-bottom: 1px solid var(--divider);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .sep {
  color: var(--text-muted);
  font-size: 12px;
}

.breadcrumb .current {
  color: var(--text-secondary);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  max-width: 860px;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-meta .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
  margin: 0 2px;
}

.article-meta .cat-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(46, 230, 195, 0.12);
  color: var(--accent);
  font-size: 13px;
  border: 1px solid rgba(46, 230, 195, 0.2);
}

/* ===== Article Main ===== */
.article-main {
  padding: 72px 0 48px;
}

.article-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: #C7D3E0;
}

.article-body > * + * {
  margin-top: 24px;
}

.article-body h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 12px;
  letter-spacing: -0.015em;
}

.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 10px;
}

.article-body p {
  line-height: 1.9;
}

.article-body a {
  color: var(--accent);
  border-bottom: 1px solid rgba(46, 230, 195, 0.3);
}

.article-body a:hover {
  color: var(--accent-secondary);
  border-bottom-color: rgba(86, 204, 242, 0.5);
}

.article-body img {
  border-radius: 12px;
  box-shadow: var(--shadow-default);
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 18px 24px;
  background: rgba(46, 230, 195, 0.05);
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  color: var(--accent-secondary);
}

.article-body pre {
  background: var(--bg-secondary);
  border: 1px solid var(--divider);
  border-radius: 12px;
  padding: 24px;
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  padding: 0;
  color: #E4EDF5;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  border: 1px solid var(--divider);
  text-align: left;
}

.article-body th {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 600;
  color: var(--text-primary);
}

.article-body td {
  color: var(--text-secondary);
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-empty {
  text-align: center;
  padding: 60px 24px;
}

.empty-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--text-muted);
}

.article-empty p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.article-empty a {
  display: inline-block;
  padding: 10px 28px;
  border: 1px solid rgba(46, 230, 195, 0.4);
  border-radius: var(--radius-btn);
  color: var(--accent);
  font-size: 15px;
  transition: background 0.25s ease, transform 0.25s ease;
}

.article-empty a:hover {
  background: rgba(46, 230, 195, 0.1);
  transform: translateY(-2px);
}

/* ===== Related Section ===== */
.related-section {
  padding: 72px 0 96px;
}

.related-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
}

.related-header h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.related-header .related-sub {
  font-size: 14px;
  color: var(--text-muted);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-default);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.related-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 230, 195, 0.5), transparent);
  z-index: 1;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46, 230, 195, 0.35);
}

.related-card .card-image {
  height: 180px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.related-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.related-card:hover .card-image img {
  transform: scale(1.05);
}

.related-card .card-content {
  padding: 24px 24px 28px;
}

.related-card .card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: rgba(46, 230, 195, 0.08);
  border: 1px solid rgba(46, 230, 195, 0.2);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.related-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
}

.related-card .card-link .arrow {
  transition: transform 0.25s ease;
}

.related-card .card-link:hover .arrow {
  transform: translateX(4px);
}

.back-list {
  margin-top: 48px;
  text-align: center;
}

.back-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

.back-list a:hover {
  color: var(--accent);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 0 0 96px;
}

.cta-card {
  position: relative;
  border-radius: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  padding: 72px 48px;
  text-align: center;
  overflow: hidden;
}

.cta-card::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(46, 230, 195, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-card h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
}

.cta-card p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.btn-primary {
  display: inline-block;
  padding: 13px 36px;
  background: var(--accent);
  color: #062A24;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  box-shadow: 0 0 20px rgba(46, 230, 195, 0.3);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  position: relative;
}

.btn-primary:hover {
  box-shadow: 0 0 32px rgba(46, 230, 195, 0.5);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--divider);
  background: rgba(7, 11, 20, 0.6);
  padding: 64px 0 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
  font-size: 22px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 320px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.25s ease;
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-icon {
  color: var(--accent);
  font-size: 10px;
  margin-top: 6px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--divider);
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1199px) {
  .related-grid {
    gap: 20px;
  }

  .footer-inner {
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .nav-right {
    gap: 4px;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 11, 20, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 199;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    font-size: 20px;
    padding: 0;
    line-height: 56px;
  }

  .nav-link::before {
    top: -8px;
  }

  .nav-divider {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .article-hero {
    padding: 120px 0 48px;
  }

  .article-title {
    font-size: 30px;
    line-height: 1.35;
  }

  .article-meta {
    font-size: 13px;
  }

  .article-main {
    padding: 48px 0 40px;
  }

  .article-body {
    font-size: 15px;
  }

  .article-body h2 {
    font-size: 24px;
  }

  .article-body h3 {
    font-size: 20px;
  }

  .related-section {
    padding: 56px 0 72px;
  }

  .related-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .related-card .card-image {
    height: 160px;
  }

  .cta-section {
    padding-bottom: 72px;
  }

  .cta-card {
    padding: 48px 24px;
  }

  .cta-card h2 {
    font-size: 26px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    font-size: 12px;
  }
}

@media (max-width: 520px) {
  .breadcrumb {
    gap: 6px;
    font-size: 12px;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .article-title {
    font-size: 27px;
  }

  .article-meta .meta-dot {
    display: none;
  }

  .related-card .card-content {
    padding: 20px;
  }
}

@media (min-width: 768px) and (max-width: 1199px) {
  .article-wrap {
    max-width: 680px;
  }

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

  .cta-card {
    padding: 56px 32px;
  }
}

/* Focus states for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

input:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(46, 230, 195, 0.15);
}

/* roulang page: category1 */
:root {
  --bg: #070B14;
  --bg-deep: #0D1420;
  --bg-soft: #0C1322;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.10);
  --glass-highlight: rgba(255,255,255,0.14);
  --text-main: #E4EDF5;
  --text-body: #C7D3E0;
  --text-secondary: #8B9AB0;
  --text-aux: #5C6B82;
  --accent: #2EE6C3;
  --accent-2: #56CCF2;
  --warn: #FFB84D;
  --divider: rgba(255,255,255,0.08);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.40);
  --shadow-glow: 0 0 20px rgba(46,230,195,0.3);
  --shadow-glow-hover: 0 0 32px rgba(46,230,195,0.5);
  --container: 1200px;
  --space-section: 96px;
  --font-family: "MiSans","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-family);
  background:var(--bg);
  color:var(--text-main);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color .25s ease,opacity .25s ease,border-color .25s ease,background .25s ease;}
button{border:none;background:none;cursor:pointer;font-family:inherit;color:inherit;}
ul,ol{list-style:none;}
::-moz-selection{background:rgba(46,230,195,0.25);color:#fff;}
::selection{background:rgba(46,230,195,0.25);color:#fff;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;
  padding:14px 28px;border-radius:var(--radius-btn);
  transition:all .25s ease;white-space:nowrap;
}
.btn-primary{
  background:var(--accent);color:#062A24;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  background:#53f2d2;color:#041f1a;
  box-shadow:var(--shadow-glow-hover);
  transform:translateY(-2px);
}
.btn-primary:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px;}
.btn-ghost{
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.16);
  color:var(--text-main);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.btn-ghost:hover{
  border-color:rgba(46,230,195,0.5);
  color:var(--accent);
  background:rgba(46,230,195,0.06);
  transform:translateY(-2px);
}
.btn-ghost:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.btn-sm{padding:10px 18px;font-size:14px;}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding-top:24px;
  transition:background .35s ease,padding .35s ease,box-shadow .35s ease;
}
.site-header.scrolled{
  padding-top:0;
  background:rgba(7,11,20,0.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:0 1px 0 rgba(255,255,255,0.06);
}
.header-inner{
  height:72px;
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:20px;font-weight:600;letter-spacing:-0.01em;
  color:var(--text-main);
}
.logo-mark{
  width:10px;height:10px;
  background:var(--accent);
  border-radius:3px;
  transform:rotate(45deg);
  display:inline-block;
  box-shadow:0 0 12px rgba(46,230,195,0.4);
  flex-shrink:0;
}
.logo:hover .logo-mark{box-shadow:0 0 20px rgba(46,230,195,0.7);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  padding:10px 20px;
  font-size:15px;font-weight:400;color:var(--text-secondary);
  border-radius:var(--radius-tag);
  transition:color .25s ease,background .25s ease;
}
.nav-link::before{
  content:'';position:absolute;top:2px;left:50%;transform:translateX(-50%);
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  opacity:0;transition:opacity .25s ease,box-shadow .25s ease;
}
.nav-link:hover{color:#fff;}
.nav-link:hover::before{opacity:0.5;box-shadow:0 0 8px rgba(46,230,195,0.5);}
.nav-link.active{color:#fff;}
.nav-link.active::before{opacity:1;box-shadow:0 0 10px rgba(46,230,195,0.6);}
.header-cta{display:flex;align-items:center;gap:20px;margin-left:8px;}
.nav-divider{width:60px;height:1px;background:rgba(255,255,255,0.14);display:block;}
.mobile-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:10px;
}
.mobile-toggle span{
  display:block;width:20px;height:2px;background:var(--text-main);
  border-radius:2px;transition:transform .3s ease,opacity .3s ease;
}
.mobile-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.mobile-toggle.active span:nth-child(2){opacity:0;}
.mobile-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-menu{
  display:none;
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:999;
  background:rgba(7,11,20,0.96);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  flex-direction:column;align-items:center;justify-content:center;gap:8px;
  opacity:0;pointer-events:none;
  transition:opacity .3s ease;
}
.mobile-menu.open{opacity:1;pointer-events:auto;}
.mobile-link{
  font-size:20px;line-height:56px;color:var(--text-secondary);
  padding:0 20px;transition:color .25s ease;
}
.mobile-link:hover,.mobile-link.active{color:#fff;}
.mobile-link.active{color:var(--accent);}

/* ===== Hero ===== */
.page-hero{
  position:relative;
  min-height:92vh;
  display:flex;align-items:center;
  padding:calc(96px + 80px) 0 80px;
  overflow:hidden;
  background:
    radial-gradient(circle at 72% 18%,rgba(27,58,107,0.55),transparent 55%),
    radial-gradient(circle at 15% 78%,rgba(46,230,195,0.07),transparent 42%),
    var(--bg);
}
.page-hero::before{
  content:'';position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:0.12;pointer-events:none;
}
.page-hero::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,var(--bg) 100%);
  pointer-events:none;
}
.hero-content{position:relative;z-index:2;max-width:820px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-tag);
  font-size:13px;color:var(--accent);
  background:rgba(46,230,195,0.08);
  border:1px solid rgba(46,230,195,0.2);
  margin-bottom:24px;
}
.hero-badge::before{
  content:'';width:6px;height:6px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px rgba(46,230,195,0.6);
}
.hero-title{
  font-size:54px;font-weight:700;line-height:1.15;
  letter-spacing:-0.02em;
  color:var(--text-main);
  margin-bottom:24px;
}
.hero-title .gradient-text{
  background:linear-gradient(120deg,var(--accent) 0%,var(--accent-2) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-subtitle{
  font-size:18px;line-height:1.75;color:var(--text-secondary);
  max-width:640px;margin-bottom:40px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px;}
.hero-meta{
  display:flex;align-items:center;gap:28px;flex-wrap:wrap;
  font-size:13px;color:var(--text-aux);
}
.hero-meta-item{display:inline-flex;align-items:center;gap:8px;}
.hero-meta-item::before{
  content:'';width:4px;height:4px;border-radius:50%;background:var(--accent);
}

/* ===== Stats ===== */
.stats-section{
  background:var(--bg);
  padding:0 0 var(--space-section);
  margin-top:-40px;position:relative;z-index:3;
}
.stats-inner{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:20px;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  padding:44px 48px;
  display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:40px;align-items:center;
  box-shadow:var(--shadow-card);
  position:relative;overflow:hidden;
}
.stats-inner::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.16),transparent);
}
.stats-text{font-size:17px;line-height:1.8;color:var(--text-body);}
.stats-text strong{color:var(--accent);font-weight:600;}
.stat-item{text-align:left;padding-left:28px;border-left:1px solid var(--divider);}
.stat-num{
  font-size:40px;font-weight:700;letter-spacing:-0.02em;
  color:var(--accent);font-variant-numeric:tabular-nums;
  line-height:1.1;margin-bottom:6px;
}
.stat-label{font-size:14px;color:var(--text-secondary);}

/* ===== Section common ===== */
.section{padding:var(--space-section) 0;}
.section-alt{background:var(--bg-deep);}
.section-head{margin-bottom:56px;max-width:720px;}
.section-tag{
  display:inline-block;padding:5px 14px;
  font-size:12px;font-weight:500;letter-spacing:0.08em;
  color:var(--accent);background:rgba(46,230,195,0.07);
  border:1px solid rgba(46,230,195,0.16);
  border-radius:var(--radius-tag);
  margin-bottom:18px;text-transform:uppercase;
}
.section-title{
  font-size:32px;font-weight:600;letter-spacing:-0.015em;
  line-height:1.25;color:var(--text-main);margin-bottom:16px;
}
.section-desc{font-size:16px;line-height:1.8;color:var(--text-secondary);}

/* ===== Services ===== */
.cards-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.service-card{
  position:relative;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  padding:32px 28px 28px;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  overflow:hidden;
}
.service-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);
}
.service-card:hover{
  transform:translateY(-4px);
  border-color:rgba(46,230,195,0.35);
  box-shadow:var(--shadow-hover);
}
.badge{
  position:absolute;top:20px;right:20px;
  display:inline-flex;flex-direction:column;align-items:center;
  padding:4px 12px;border-radius:8px;
  background:rgba(46,230,195,0.08);
  border:1px solid rgba(46,230,195,0.2);
}
.badge b{font-size:16px;font-weight:700;color:var(--accent);line-height:1.1;}
.badge span{font-size:11px;color:var(--text-secondary);}
.card-icon{
  width:48px;height:48px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(46,230,195,0.09);
  border:1px solid rgba(46,230,195,0.14);
  color:var(--accent);
  margin-bottom:22px;
}
.card-icon svg{width:24px;height:24px;}
.card-title{font-size:19px;font-weight:600;color:var(--text-main);margin-bottom:12px;}
.card-desc{font-size:14px;line-height:1.7;color:var(--text-secondary);margin-bottom:20px;}
.card-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--accent);font-weight:500;
  padding-top:14px;border-top:1px solid var(--divider);
  width:100%;transition:gap .25s ease,color .25s ease;
}
.card-link:hover{gap:10px;color:#5cf0d0;}
.card-link svg{width:16px;height:16px;}

/* ===== Scenarios ===== */
.scenarios-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.scenario-card{
  display:flex;min-height:260px;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  overflow:hidden;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.scenario-card:hover{
  transform:translateY(-4px);
  border-color:rgba(46,230,195,0.3);
  box-shadow:var(--shadow-hover);
}
.scenario-media{width:40%;flex-shrink:0;position:relative;overflow:hidden;min-height:200px;}
.scenario-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.scenario-card:hover .scenario-media img{transform:scale(1.05);}
.scenario-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,transparent 60%,rgba(13,20,32,0.4) 100%);
}
.scenario-info{
  flex:1;padding:32px 30px;
  display:flex;flex-direction:column;align-items:flex-start;justify-content:center;
}
.scenario-tag{
  display:inline-block;padding:4px 12px;margin-bottom:14px;
  font-size:12px;font-weight:500;color:var(--accent-2);
  background:rgba(86,204,242,0.08);
  border:1px solid rgba(86,204,242,0.18);
  border-radius:var(--radius-tag);
}
.scenario-title{font-size:20px;font-weight:600;color:var(--text-main);margin-bottom:10px;}
.scenario-desc{font-size:14px;line-height:1.7;color:var(--text-secondary);margin-bottom:18px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;color:var(--accent);
  transition:gap .25s ease;
}
.text-link:hover{gap:10px;color:#5cf0d0;}

/* ===== Process ===== */
.process-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  counter-reset:step;
}
.process-step{
  position:relative;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-card);
  padding:36px 26px 28px;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.process-step:hover{
  transform:translateY(-4px);
  border-color:rgba(46,230,195,0.3);
  box-shadow:var(--shadow-hover);
}
.step-num{
  font-size:44px;font-weight:700;line-height:1;
  color:rgba(46,230,195,0.22);
  font-variant-numeric:tabular-nums;
  margin-bottom:20px;
  display:block;
}
.step-title{font-size:18px;font-weight:600;color:var(--text-main);margin-bottom:12px;}
.step-desc{font-size:14px;line-height:1.7;color:var(--text-secondary);}
.process-arrow{
  position:absolute;top:50%;right:-20px;transform:translateY(-50%);
  width:16px;height:16px;color:rgba(46,230,195,0.35);
  z-index:2;display:none;
}
.process-arrow svg{width:100%;height:100%;}

/* ===== FAQ ===== */
.faq-section{background:var(--bg);}
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item:first-child{border-top:1px solid var(--divider);}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;text-align:left;
  padding:26px 8px;
  font-size:17px;font-weight:500;color:var(--text-main);
  transition:color .25s ease;
  cursor:pointer;
}
.faq-question:hover{color:var(--accent);}
.faq-question:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.faq-icon{
  width:28px;height:28px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--glass-border);
  color:var(--accent);
  font-size:18px;font-weight:300;
  transition:transform .3s ease,border-color .3s ease,background .3s ease;
}
.faq-item.open .faq-icon{
  transform:rotate(45deg);
  border-color:var(--accent);
  background:rgba(46,230,195,0.1);
}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .4s ease,padding .4s ease;
  padding:0 8px;font-size:15px;line-height:1.8;color:var(--text-secondary);
}
.faq-item.open .faq-answer{padding-bottom:26px;}

/* ===== CTA ===== */
.cta-section{padding:calc(var(--space-section) + 24px) 0 var(--space-section);}
.cta-inner{
  position:relative;
  max-width:1100px;margin:0 auto;
  background:linear-gradient(135deg,rgba(10,18,32,0.95),rgba(13,20,32,0.98));
  border:1px solid var(--glass-border);
  border-radius:24px;
  padding:64px 56px;
  text-align:center;
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.cta-inner::before{
  content:'';position:absolute;top:-120px;left:50%;transform:translateX(-50%);
  width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,230,195,0.12) 0%,transparent 65%);
  pointer-events:none;
}
.cta-inner::after{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(46,230,195,0.4),transparent);
}
.cta-title{
  position:relative;z-index:2;
  font-size:32px;font-weight:600;letter-spacing:-0.015em;
  color:var(--text-main);margin-bottom:14px;
}
.cta-desc{
  position:relative;z-index:2;
  font-size:16px;color:var(--text-secondary);
  margin-bottom:36px;
}
.cta-actions{
  position:relative;z-index:2;
  display:flex;gap:16px;justify-content:center;flex-wrap:wrap;
}

/* ===== Footer ===== */
.site-footer{
  border-top:1px solid var(--divider);
  background:var(--bg-deep);
  padding:64px 0 0;
}
.footer-inner{
  max-width:var(--container);
  margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:2fr 1fr 1.2fr;gap:48px;
  padding-bottom:48px;
}
.footer-brand .logo{font-size:20px;margin-bottom:16px;display:inline-flex;}
.footer-desc{
  font-size:14px;line-height:1.8;color:var(--text-secondary);
  max-width:360px;margin-top:12px;
}
.footer-col-title{
  font-size:15px;font-weight:600;color:var(--text-main);
  margin-bottom:20px;
  padding-bottom:10px;position:relative;
}
.footer-col-title::after{
  content:'';position:absolute;bottom:0;left:0;
  width:28px;height:2px;border-radius:2px;background:var(--accent);
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-secondary);transition:color .25s ease,padding-left .25s ease;}
.footer-links a:hover{color:var(--accent);padding-left:4px;}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.contact-item{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text-secondary);line-height:1.6;
}
.contact-icon{
  width:6px;height:6px;border-radius:50%;background:var(--accent);
  margin-top:9px;flex-shrink:0;box-shadow:0 0 6px rgba(46,230,195,0.5);
}
.footer-bottom{
  border-top:1px solid var(--divider);
  padding:18px 32px;
  text-align:center;
  font-size:12px;color:var(--text-aux);
}

/* ===== Media Queries ===== */
@media (max-width:1199px){
  .container{padding:0 24px;}
  .footer-inner{padding:0 24px 48px;}
  .hero-title{font-size:46px;}
  .stats-inner{grid-template-columns:1fr repeat(3,1fr);gap:28px;padding:36px 32px;}
}
@media (max-width:1023px){
  .cards-grid{grid-template-columns:repeat(2,1fr);}
  .scenarios-grid{grid-template-columns:1fr;}
  .process-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .stats-inner{grid-template-columns:1fr 1fr;gap:32px;}
  .stats-text{grid-column:1 / -1;}
  .stat-item{padding-left:0;border-left:none;padding-top:20px;border-top:1px solid var(--divider);}
  .footer-inner{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:767px){
  :root{--space-section:64px;}
  .container{padding:0 20px;}
  .site-header{padding-top:0;background:rgba(7,11,20,0.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);}
  .header-inner{height:64px;}
  .nav-links,.header-cta .nav-divider,.header-cta .btn{display:none;}
  .mobile-toggle{display:flex;}
  .mobile-menu{display:flex;}
  .page-hero{padding:120px 0 64px;min-height:auto;}
  .hero-title{font-size:34px;}
  .hero-subtitle{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px;}
  .hero-actions .btn{width:100%;}
  .hero-meta{gap:16px;flex-direction:column;align-items:flex-start;}
  .stats-inner{grid-template-columns:1fr;padding:32px 24px;}
  .stats-text{grid-column:auto;}
  .stat-item{padding-top:18px;}
  .section-title{font-size:26px;}
  .section-head{margin-bottom:36px;}
  .cards-grid{grid-template-columns:1fr;gap:20px;}
  .scenario-card{flex-direction:column;}
  .scenario-media{width:100%;height:200px;}
  .scenario-media::after{background:linear-gradient(180deg,transparent 60%,rgba(13,20,32,0.35) 100%);}
  .scenario-info{padding:24px 24px 28px;}
  .process-grid{grid-template-columns:1fr;}
  .faq-question{font-size:15px;padding:22px 4px;}
  .faq-answer{font-size:14px;}
  .cta-inner{padding:48px 28px;}
  .cta-title{font-size:26px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-inner{grid-template-columns:1fr;gap:36px;padding-bottom:32px;}
  .footer-bottom{padding:16px 20px;}
}
@media (max-width:520px){
  .hero-title{font-size:30px;}
  .stat-num{font-size:34px;}
  .btn{width:100%;}
  .scenario-media{height:170px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}