/* roulang page: index */
:root {
  --bg: #0A1326;
  --bg-deep: #050A16;
  --panel: #101E38;
  --blue: #2E8BFF;
  --blue-deep: #1D6FE0;
  --blue-light: #67C7FF;
  --cyan: #7DE3FF;
  --title: #F4F9FF;
  --body: #C5D6EC;
  --sub: #8FA7C3;
  --disable: #58718F;
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.16);
  --glass: linear-gradient(135deg, rgba(255,255,255,0.055), rgba(255,255,255,0.015));
  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-card: 0 12px 40px rgba(3, 8, 18, 0.55), 0 1px 0 rgba(255,255,255,0.06) inset;
  --container: 1200px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", "system-ui", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--body);
  line-height: 1.7;
  overflow-x: hidden;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease; }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.site-header {
  position: fixed; top: 0; left: 0; width: 100%;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(5,10,22,0.86) 10%, rgba(5,10,22,0.5) 80%, rgba(5,10,22,0));
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: rgba(6, 11, 25, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 18px;
  box-shadow: 0 0 18px rgba(46, 139, 255, 0.28);
  letter-spacing: -0.02em;
}
.brand-text {
  color: var(--title);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.main-nav { display: flex; align-items: center; gap: 8px; }
.nav-list { display: flex; list-style: none; align-items: center; gap: 4px; }
.nav-list > li > a {
  display: inline-flex;
  align-items: center;
  padding: 9px 13px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--sub);
  position: relative;
}
.nav-list > li > a::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 3px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.2s ease, transform 0.25s ease;
}
.nav-list > li > a:hover { color: #fff; }
.nav-list > li > a:hover::after, .nav-list > li > a.active::after { opacity: 1; transform: scaleX(1); }
.nav-list > li > a.active { color: var(--title); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: #E4F0FF; border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 150px 0 96px;
  background:
    linear-gradient(105deg, rgba(5,10,22,0.97) 0%, rgba(9,18,38,0.90) 48%, rgba(13,27,52,0.68) 100%),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  top: -180px; left: -140px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(46,139,255,0.18), transparent 65%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 64px;
  align-items: center;
  width: 100%;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--cyan);
  background: rgba(125, 227, 255, 0.08);
  border: 1px solid rgba(125, 227, 255, 0.2);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 26px;
  font-weight: 500;
}
.hero h1 {
  color: var(--title);
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.22;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.h1-accent {
  display: block;
  font-size: 0.55em;
  color: var(--body);
  font-weight: 500;
  letter-spacing: 0.01em;
  margin-top: 16px;
}
.text-primary { color: var(--blue-light); }
.hero-desc {
  font-size: 17px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.85;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: all 0.25s ease;
}
.btn .arrow { transition: transform 0.25s ease; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  color: #fff;
  box-shadow: 0 8px 24px rgba(46,139,255,0.2);
}
.btn-primary:hover { background: linear-gradient(135deg, #3f9aff, #2e7eed); box-shadow: 0 10px 30px rgba(46,139,255,0.35); transform: translateY(-2px); }
.btn-secondary { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.16); color: var(--title); backdrop-filter: blur(8px); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.3); transform: translateY(-2px); }
.btn:focus-visible, .arrow-link:focus-visible, a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.hero-card {
  border-radius: var(--radius-xl);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 30px;
  background: linear-gradient(135deg, rgba(16,30,56,0.72), rgba(5,10,22,0.5));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-card);
  position: relative;
}
.hero-card::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(103,199,255,0.12), transparent 65%);
  pointer-events: none;
}
.hero-card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.hero-card-title strong { color: var(--title); font-weight: 600; font-size: 18px; }
.hero-card-title span { font-size: 12px; color: var(--disable); letter-spacing: 0.02em; }
.hero-card p { color: var(--body); font-size: 15px; margin-bottom: 18px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-size: 13px;
  color: #d7e6fb;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 999px;
  background: rgba(255,255,255,0.035);
}
.hero-card-link { display: inline-flex; gap: 6px; align-items: center; color: var(--blue-light); font-size: 14px; font-weight: 500; }
.hero-card-link:hover { color: #fff; gap: 9px; }

.section { padding: 96px 0; }
.section-lighter { background: rgba(8,15,30,0.6); border-top: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05); }
.section-head { max-width: 820px; margin-bottom: 48px; }
.section-head h2 {
  font-size: clamp(28px, 3.3vw, 38px);
  line-height: 1.3;
  font-weight: 600;
  color: var(--title);
  margin: 16px 0 16px;
  letter-spacing: -0.01em;
}
.section-head p { font-size: 16px; color: var(--body); line-height: 1.8; max-width: 720px; }
.section-sub-title { color: var(--sub); font-size: 15px; }

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 64px;
  align-items: center;
}
.about-copy h2 { color: var(--title); font-size: clamp(26px, 3vw, 34px); font-weight: 600; line-height: 1.35; margin-bottom: 22px; }
.about-copy p + p { margin-top: 18px; }
.about-copy p { color: var(--body); line-height: 1.9; }
.about-copy p strong { color: var(--title); font-weight: 600; }
.about-media { border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--line-strong); background: var(--panel); position: relative; }
.about-media img { width: 100%; height: 420px; object-fit: cover; transition: transform 0.8s ease; }
.about-media:hover img { transform: scale(1.025); }
.about-card-note {
  position: absolute;
  left: 18px; bottom: 18px;
  right: 18px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(5,10,22,0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 14px 18px;
  font-size: 14px;
  color: var(--title);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.feature-card {
  border-radius: var(--radius-xl);
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.12);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  grid-column: span 2;
}
.feature-card.wide { grid-column: span 4; }
.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(125,227,255,0.35);
  box-shadow: 0 18px 50px rgba(4,8,18,0.5), 0 1px 0 rgba(255,255,255,0.08);
}
.feature-media { width: 100%; height: 160px; overflow: hidden; position: relative; background: #0c1930; }
.feature-media img { width: 100%; height: 100%; object-fit: cover; }
.feature-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(8,13,25,0.24), transparent 60%); }
.feature-body { padding: 26px 26px 24px; flex: 1; display: flex; flex-direction: column; }
.card-badge {
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.feature-body h3 { font-size: 20px; font-weight: 600; color: var(--title); margin-bottom: 10px; line-height: 1.45; }
.feature-body p { font-size: 15px; color: var(--sub); line-height: 1.75; margin-bottom: 18px; flex: 1; }
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-light);
  font-weight: 500;
  font-size: 15px;
}
.arrow-link .ico { transition: transform 0.25s ease; }
.feature-card:hover .arrow-link .ico, .arrow-link:hover .ico { transform: translateX(4px); }
.arrow-link:hover { color: #fff; }

.news-list { display: grid; gap: 16px; margin-top: 8px; }
.news-item {
  width: 100%;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(255,255,255,0.045), rgba(255,255,255,0.015));
  border: 1px solid rgba(255,255,255,0.10);
  padding: 24px 24px;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  transition: border-color 0.25s ease, transform 0.3s ease, background 0.25s ease;
}
.news-item:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(125,227,255,0.22);
  transform: translateY(-2px);
}
.news-left { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.news-date { font-size: 14px; color: var(--title); font-variant-numeric: tabular-nums; letter-spacing: 0.01em; }
.news-right { min-width: 0; }
.news-right h3 { font-size: 18px; font-weight: 600; color: var(--title); margin: 0 0 8px; line-height: 1.5; }
.news-right p { font-size: 15px; color: var(--sub); margin: 0; line-height: 1.75; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-action { white-space: nowrap; }
.badge {
  display: inline-flex;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(46,139,255,0.1);
  color: var(--blue-light);
  border: 1px solid rgba(46,139,255,0.2);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
}
.empty-state {
  grid-column: 1 / -1;
  padding: 48px 24px;
  text-align: center;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.02);
}
.empty-state .empty-icon { font-size: 30px; color: var(--disable); margin-bottom: 14px; }
.empty-state p { font-size: 15px; color: var(--sub); }

.assure-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.assure-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.10);
  background: var(--glass);
  padding: 28px 24px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.assure-card:hover { border-color: rgba(125,227,255,0.24); transform: translateY(-3px); }
.assure-icon { width: 42px; height: 42px; border-radius: 12px; background: rgba(46,139,255,0.12); border: 1px solid rgba(46,139,255,0.22); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; color: var(--blue-light); }
.assure-card h3 { color: var(--title); font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.assure-card p { font-size: 14px; color: var(--sub); line-height: 1.7; margin: 0; }

.faq-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 32px;
  margin-top: 20px;
  max-width: 1080px;
}
.faq-item {
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.02);
  overflow: hidden;
  transition: border-color 0.25s ease;
}
.faq-item:hover { border-color: rgba(125,227,255,0.2); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  color: var(--title);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.5;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex: 0 0 22px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(46,139,255,0.1);
  border: 1px solid rgba(46,139,255,0.25);
  color: var(--blue-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.faq-item[open] summary::after { content: ""; transform: rotate(180deg); background: var(--blue); border-color: var(--blue); color: #fff; width: 22px; height: 22px; border-radius: 50%; position: relative; }
.faq-item[open] summary::after { background: rgba(46,139,255,0.2); border-color: rgba(46,139,255,0.5); color: #fff; display: flex; }
.faq-item[open] summary::after { content: "−"; transform: rotate(0); }
.faq-body { padding: 0 22px 22px; }
.faq-body p { font-size: 15px; color: var(--sub); line-height: 1.85; }

.cta-section { padding: 80px 0 110px; }
.cta-panel {
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,0.14);
  background:
    linear-gradient(130deg, rgba(13,29,58,0.78), rgba(5,10,22,0.65)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  box-shadow: 0 20px 70px rgba(3,8,18,0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 68px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::after {
  content: "";
  position: absolute;
  top: -80px; right: -60px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(46,139,255,0.15), transparent 60%);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 2; max-width: 620px; margin: 0 auto; }
.cta-inner h2 { color: var(--title); font-size: clamp(24px, 2.8vw, 32px); line-height: 1.4; font-weight: 600; margin-bottom: 14px; }
.cta-inner p { color: var(--body); font-size: 16px; line-height: 1.8; margin-bottom: 32px; }
.cta-form { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.cta-form input {
  flex: 1 1 240px;
  max-width: 360px;
  min-height: 48px;
  padding: 0 18px;
  background: rgba(5, 10, 22, 0.55);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-md);
  color: var(--title);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.cta-form input::placeholder { color: var(--disable); }
.cta-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(46,139,255,0.14); }

.site-footer { background: var(--bg-deep); border-top: 1px solid rgba(255,255,255,0.07); padding: 64px 0 36px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.6fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  margin-bottom: 32px;
}
.footer-brand .brand-text { font-size: 18px; }
.footer-brand p { color: var(--sub); font-size: 14px; line-height: 1.8; margin-top: 16px; max-width: 300px; }
.footer-col h4 { color: var(--title); font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { color: var(--sub); font-size: 14px; }
.footer-col ul a:hover { color: var(--blue-light); }
.footer-contact li { color: var(--sub); font-size: 14px; display: flex; gap: 10px; align-items: flex-start; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--disable);
}
.footer-bottom a { color: var(--sub); }
.footer-bottom a:hover { color: var(--blue-light); }

@media (max-width: 1199px) {
  .assure-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-card { max-width: 560px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .section { padding: 80px 0; }
}
@media (max-width: 991px) {
  .nav-toggle { display: inline-flex; }
  .main-nav { position: fixed; inset: 0; background: rgba(5, 10, 22, 0.97); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); z-index: 989; flex-direction: column; align-items: flex-start; justify-content: flex-start; padding: 100px 28px 32px; transform: translateX(100%); transition: transform 0.4s ease; visibility: hidden; }
  body.nav-open .main-nav { transform: translateX(0); visibility: visible; }
  .nav-list { flex-direction: column; align-items: flex-start; gap: 6px; width: 100%; }
  .nav-list li { width: 100%; }
  .nav-list > li > a { width: 100%; justify-content: space-between; padding: 15px 8px; font-size: 20px; border-bottom: 1px solid rgba(255,255,255,0.07); border-radius: 0; }
  .nav-list > li > a::after { display: none; }
  .nav-list > li > a.active { color: var(--blue-light); }
  .feature-grid { grid-template-columns: repeat(6, 1fr); }
  .feature-card { grid-column: span 3; }
  .feature-card.wide { grid-column: span 6; }
  .news-item { grid-template-columns: 1fr; gap: 14px; padding: 22px; }
  .news-left { flex-direction: row; justify-content: space-between; gap: 16px; width: 100%; }
  .faq-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .cta-panel { padding: 48px 28px; }
}
@media (max-width: 767px) {
  .header-inner { min-height: 66px; padding: 0 18px; }
  .brand-text { font-size: 16px; }
  .container { padding: 0 18px; }
  .hero { padding: 120px 0 76px; }
  .hero h1 { font-size: 36px; }
  .h1-accent { font-size: 0.62em; }
  .hero-desc { font-size: 16px; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 34px; }
  .feature-grid { display: flex; flex-direction: column; gap: 18px; }
  .feature-card, .feature-card.wide { grid-column: auto; }
  .assure-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; }
  .cta-form .btn { width: 100%; }
  .about-media img { height: 300px; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 32px; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
  .btn { min-height: 48px; }
  .feature-body h3 { font-size: 18px; }
}

/* roulang page: category1 */
:root {
  --bg-deep: #0A1326;
  --bg-darker: #050A16;
  --bg-card: #101E38;
  --bg-elevated: rgba(255, 255, 255, 0.04);
  --primary: #2E8BFF;
  --primary-dark: #1D6FE0;
  --primary-light: #67C7FF;
  --cyan-light: #7DE3FF;
  --text-title: #F4F9FF;
  --text-body: #C5D6EC;
  --text-muted: #8FA7C3;
  --text-faint: #58718F;
  --border-line: rgba(255, 255, 255, 0.12);
  --border-hover: rgba(120, 220, 255, 0.3);
  --success: #3DD68C;
  --warning: #FFB648;
  --radius-big: 20px;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 12px 40px rgba(3, 8, 18, 0.5), 0 1px 0 rgba(255, 255, 255, 0.08) inset;
  --spacer-section: 96px;
  --content-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-deep);
  background-image: radial-gradient(ellipse 60% 40% at 20% 0%, rgba(46, 139, 255, 0.14), transparent 65%), radial-gradient(ellipse 40% 30% at 95% 10%, rgba(46, 139, 255, 0.08), transparent 70%);
  color: var(--text-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

body.menu-open {
  overflow: hidden;
}

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

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

button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
  outline: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 26, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 17px;
  box-shadow: 0 6px 16px rgba(29, 111, 224, 0.35);
}

.brand-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-title);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 8px 0 10px;
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
  line-height: 1.4;
}

.nav-list a:hover {
  color: #fff;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--primary));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.nav-list a.active {
  color: #fff;
}

.nav-list a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: 10px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #dceaf6;
  transition: transform 0.3s ease, opacity 0.2s ease;
}

.site-header.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-header.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-main {
  padding-top: 0;
}

.page-hero {
  position: relative;
  padding: 88px 0 72px;
  background-image: linear-gradient(rgba(5, 10, 22, 0.82), rgba(7, 15, 30, 0.96)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  pointer-events: none;
  width: 400px;
  height: 400px;
  left: -150px;
  top: -100px;
  background: radial-gradient(circle, rgba(46, 139, 255, 0.35), transparent 68%);
  filter: blur(20px);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.breadcrumb a {
  color: var(--text-body);
  opacity: 0.7;
  transition: opacity 0.2s;
}

.breadcrumb a:hover {
  color: var(--primary-light);
  opacity: 1;
}

.breadcrumb span {
  color: var(--text-faint);
}

.page-hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.3;
  font-weight: 600;
  color: var(--text-title);
  letter-spacing: -0.01em;
}

.hero-lead {
  margin-top: 18px;
  max-width: 660px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-body);
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #3f9aff, var(--primary-dark));
  color: #fff;
  box-shadow: 0 8px 28px rgba(46, 139, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #54adff, #2277eb);
  box-shadow: 0 12px 34px rgba(46, 139, 255, 0.46);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-line);
  color: var(--text-title);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  min-height: 360px;
}

.hero-visual-card {
  position: relative;
  border-radius: var(--radius-big);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(19, 32, 58, 0.62);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.hero-visual-media img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-visual-body {
  padding: 22px 28px 28px;
}

.hero-visual-body span {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  background: rgba(46, 139, 255, 0.14);
  border: 1px solid rgba(46, 139, 255, 0.35);
  color: var(--primary-light);
}

.hero-visual-body h3 {
  margin-top: 12px;
  font-size: 18px;
  color: var(--text-title);
  font-weight: 600;
}

.hero-visual-body p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.section {
  padding-top: var(--spacer-section);
  padding-bottom: var(--spacer-section);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 38px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-light);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.section-tag::before {
  content: "";
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-light), transparent);
}

.section-title {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.35;
  font-weight: 600;
  color: var(--text-title);
}

.section-sub {
  max-width: 760px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 4px;
}

.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 24px;
}

.content-card {
  background: linear-gradient(145deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  border: 1px solid var(--border-line);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
}

.content-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.card-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.content-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.5;
}

.content-card p {
  margin-top: 14px;
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.85;
}

.content-card .card-desc {
  color: var(--text-muted);
  font-size: 14px;
}

.card-desc + a {
  margin-top: 20px;
}

.check-list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.6;
}

.check-list li::before {
  content: "";
  flex: 0 0 5px;
  width: 5px;
  height: 5px;
  margin-top: 11px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 10px rgba(61, 214, 140, 0.7);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--primary-light);
  margin-top: auto;
  padding-top: 20px;
  transition: gap 0.25s ease, color 0.2s ease;
}

.link-arrow:hover {
  color: #fff;
  gap: 10px;
}

.mini-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
  margin-top: 12px;
}

.mini-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-body);
  white-space: nowrap;
}

.entry-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.entry-pills span {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-body);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-line);
}

.path-section {
  background: linear-gradient(180deg, rgba(5, 10, 22, 0.28), transparent);
  margin-top: 8px;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.split-media {
  position: relative;
  border-radius: var(--radius-big);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-card);
}

.split-media img {
  width: 100%;
  height: 460px;
  object-fit: cover;
}

.media-caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(8, 16, 30, 0.72);
  backdrop-filter: blur(14px);
  color: var(--text-body);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 13px;
  line-height: 1.6;
}

.path-copy h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  color: var(--text-title);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 16px;
}

.path-copy > p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 24px;
}

.step-list {
  display: grid;
  gap: 0;
  counter-reset: steps;
}

.step-list li {
  position: relative;
  display: flex;
  gap: 18px;
  padding-bottom: 24px;
}

.step-list li:last-child {
  padding-bottom: 0;
}

.step-list li::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 50%;
  border: 1px solid rgba(46, 139, 255, 0.48);
  background: rgba(46, 139, 255, 0.1);
  color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  margin-top: 4px;
}

.step-content strong {
  display: block;
  font-size: 16px;
  color: var(--text-title);
  font-weight: 600;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

.intro-note {
  margin-top: 12px;
  border-left: 2px solid var(--primary);
  padding: 6px 16px;
  font-size: 14px;
  color: var(--text-muted);
}

.split-media + .split-media, .split-copy + .split-copy {
  margin-top: 0;
}

.case-section {
  background: rgba(16, 30, 56, 0.24);
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.case-card {
  display: flex;
  gap: 18px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border-line);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.case-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.case-num {
  font-size: 26px;
  line-height: 1;
  font-weight: 600;
  color: transparent;
  -webkit-text-stroke: 1px rgba(103, 199, 255, 0.65);
  font-variant-numeric: tabular-nums;
}

.case-card h3 {
  font-size: 17px;
  color: var(--text-title);
  margin-bottom: 8px;
}

.case-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--primary-light);
  transition: gap 0.2s ease;
}

.case-link:hover {
  gap: 8px;
}

.notice-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.notice-item {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  padding: 20px;
  background: rgba(255, 255, 255, 0.024);
}

.notice-item .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-light);
  box-shadow: 0 0 10px rgba(46, 139, 255, 0.8);
  margin-bottom: 14px;
}

.notice-item strong {
  display: block;
  font-size: 15px;
  color: var(--text-title);
  font-weight: 600;
  margin-bottom: 6px;
}

.notice-item span {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  display: block;
}

.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px 28px;
  align-items: start;
}

.faq-item {
  border: 1px solid transparent;
  border-bottom-color: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.faq-item.open {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0 14px;
}

.faq-question {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 18px 0;
  cursor: pointer;
  text-align: left;
  line-height: 1.5;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-title);
}

.faq-question .icon {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  position: relative;
  margin-top: 4px;
  transition: transform 0.3s ease;
}

.faq-item.open .icon {
  transform: rotate(180deg);
}

.faq-question .icon::before,
.faq-question .icon::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background: var(--primary-light);
  transition: opacity 0.2s ease;
}

.faq-question .icon::before {
  width: 14px;
  height: 2px;
  left: 1px;
  top: 8px;
}

.faq-question .icon::after {
  width: 2px;
  height: 14px;
  left: 8px;
  top: 2px;
}

.faq-item.open .icon::after {
  opacity: 0;
}

.faq-answer {
  display: none;
  padding: 0 0 18px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-muted);
  max-width: 720px;
}

.faq-item.open .faq-answer {
  display: block;
}

.cta-panel {
  position: relative;
  border-radius: 24px;
  border: 1px solid rgba(103, 199, 255, 0.25);
  background: linear-gradient(130deg, rgba(46, 139, 255, 0.15), rgba(16, 30, 56, 0.6), rgba(46, 139, 255, 0.08));
  padding: 48px 24px;
  overflow: hidden;
  text-align: center;
  backdrop-filter: blur(8px);
}

.cta-panel::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(59, 160, 255, 0.25), transparent 70%);
  left: 50%;
  top: -180px;
  transform: translateX(-50%);
  pointer-events: none;
}

.cta-panel h2 {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.4;
}

.cta-panel p {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 15px;
}

.cta-buttons {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.site-footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 56px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 46px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  color: var(--text-title);
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 8px;
}

.footer-col a,
.footer-col li {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-contact {
  word-break: break-all;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 22px 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-faint);
}

@media (max-width: 1180px) {
  .container {
    padding-left: 22px;
    padding-right: 22px;
  }
  .nav-list {
    gap: 22px;
  }
  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 991px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    max-width: 620px;
  }
  .overview-grid {
    grid-template-columns: 1fr;
  }
  .split-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .split-media img {
    height: 360px;
  }
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }
  .notice-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .faq-wrap {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 767px) {
  :root {
    --spacer-section: 64px;
  }
  .site-header {
    background: rgba(5, 10, 22, 0.92);
  }
  .header-inner {
    height: 64px;
    padding: 0 18px;
  }
  .brand-mark {
    width: 30px;
    height: 30px;
    border-radius: 9px;
    font-size: 15px;
  }
  .brand-text {
    font-size: 16px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    height: calc(100dvh - 64px);
    background: rgba(5, 10, 22, 0.97);
    backdrop-filter: blur(22px);
    padding: 32px 24px;
    align-items: flex-start;
    justify-content: flex-start;
    visibility: hidden;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
    overflow-y: auto;
    z-index: 120;
  }
  .site-header.nav-open .main-nav {
    visibility: visible;
    opacity: 1;
    transform: none;
  }
  .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .nav-list li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .nav-list a {
    padding: 16px 8px;
    font-size: 17px;
  }
  .page-hero {
    padding: 64px 0 52px;
  }
  .hero-inner {
    gap: 28px;
  }
  .hero-actions {
    gap: 12px;
  }
  .btn {
    width: calc(50% - 6px);
    min-width: 0;
    padding: 0 14px;
  }
  .section-head {
    margin-bottom: 28px;
  }
  .overview-grid {
    gap: 18px;
  }
  .content-card {
    padding: 22px;
  }
  .case-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .notice-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .cta-panel {
    padding: 36px 18px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 34px;
  }
  .footer-brand p {
    max-width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
  }
  .hero-visual {
    min-height: 0;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
  }
  .notice-grid {
    grid-template-columns: 1fr;
  }
  .split-media img {
    height: 280px;
  }
  .case-card {
    padding: 18px;
  }
  .content-card {
    padding: 18px;
  }
  .cta-buttons .btn {
    width: 100%;
  }
  .faq-item.open {
    padding: 0 6px;
  }
  .hero-visual-media img {
    height: 160px;
  }
  .step-list li {
    gap: 12px;
  }
  .step-list li::before {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
    font-size: 13px;
  }
}

/* roulang page: article */
:root {
    --bg: #070e1b;
    --bg-deep: #040914;
    --panel: rgba(16, 30, 56, 0.55);
    --panel-soft: rgba(255, 255, 255, 0.04);
    --line: rgba(255, 255, 255, 0.09);
    --line-bright: rgba(120, 220, 255, 0.3);
    --blue: #2e8bff;
    --blue-deep: #1d6fe0;
    --blue-soft: rgba(46, 139, 255, 0.14);
    --cyan: #7de3ff;
    --title: #f1f7ff;
    --body: #c5d6ec;
    --dim: #8fa7c3;
    --mute: #58718f;
    --success: #3dd68c;
    --warning: #ffb648;
    --danger: #ff6b81;
    --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    --radius-xl: 24px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow: 0 12px 40px rgba(3, 8, 18, 0.6), 0 1px 0 rgba(255, 255, 255, 0.08);
    --section: 96px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--body);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button,
input {
    font-family: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.skip-link {
    position: fixed;
    top: -80px;
    left: 18px;
    z-index: 200;
    background: var(--blue);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    transition: top .25s ease;
}

.skip-link:focus {
    top: 14px;
}

.site-main {
    min-height: 70vh;
}

/* header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(180deg, rgba(4, 9, 20, 0.92), rgba(4, 9, 20, 0.68));
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 13px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #2e8bff, #1d6fe0);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 0 24px rgba(46, 139, 255, 0.3);
}

.brand-text {
    font-size: 19px;
    font-weight: 600;
    color: var(--title);
    white-space: nowrap;
    letter-spacing: -0.01em;
}

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-list a {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--dim);
    transition: color .25s ease, background .25s ease;
}

.nav-list a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.04);
}

.nav-list a.active {
    color: #fff;
}

.nav-list a.active::after {
    content: "";
    position: absolute;
    left: 15px;
    right: 15px;
    bottom: 2px;
    height: 2px;
    border-radius: 99px;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    box-shadow: 0 0 12px rgba(125, 227, 255, 0.5);
}

.nav-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.03);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    z-index: 130;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: #dceaff;
    border-radius: 99px;
    transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* page banner */
.page-banner {
    position: relative;
    padding: 52px 0 24px;
    border-bottom: 1px solid var(--line);
    background:
        linear-gradient(180deg, rgba(5, 10, 21, 0.78), rgba(7, 14, 27, 0.96)),
        url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
}

.breadcrumb {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    font-size: 14px;
    color: var(--dim);
}

.breadcrumb a {
    color: var(--dim);
    transition: color .22s ease;
}

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

.breadcrumb i {
    font-style: normal;
    color: var(--mute);
}

.breadcrumb span {
    color: var(--cyan);
    word-break: break-word;
}

.banner-note {
    position: relative;
    z-index: 2;
    margin-top: 18px;
    font-size: 14px;
    color: var(--dim);
    letter-spacing: 0.02em;
}

/* article main */
.article-section {
    padding: 52px 0 30px;
}

.article-wrap {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

.article-card {
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    padding: clamp(28px, 5vw, 52px);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.article-head {
    margin-bottom: 42px;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-bottom: 22px;
}

.cat-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 99px;
    border: 1px solid rgba(46, 139, 255, 0.35);
    background: var(--blue-soft);
    color: #aee1ff;
    font-size: 13px;
    letter-spacing: 0.02em;
    transition: border-color .25s ease, background .25s ease;
}

.cat-badge:hover {
    border-color: rgba(125, 227, 255, 0.55);
    background: rgba(46, 139, 255, 0.2);
}

.meta-time {
    display: inline-flex;
    align-items: center;
    font-size: 13px;
    color: var(--dim);
    font-variant-numeric: tabular-nums;
}

.meta-time::before {
    content: "";
    width: 4px;
    height: 4px;
    border-radius: 99px;
    background: var(--mute);
    margin-right: 12px;
}

.article-head h1 {
    max-width: 900px;
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.4;
    color: var(--title);
    font-weight: 600;
    letter-spacing: -0.01em;
    word-break: break-word;
}

/* article content */
.article-content {
    font-size: 17px;
    line-height: 1.9;
    color: var(--body);
    word-break: break-word;
}

.article-content p {
    margin: 1.15em 0;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: var(--title);
    line-height: 1.45;
    margin: 1.6em 0 0.6em;
    font-weight: 600;
}

.article-content h2 {
    font-size: 24px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content h3 {
    font-size: 21px;
}

.article-content a {
    color: var(--cyan);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(125, 227, 255, 0.35);
    transition: text-decoration-color .2s ease, color .2s ease;
}

.article-content a:hover {
    color: #b8f1ff;
    text-decoration-color: rgba(125, 227, 255, 0.8);
}

.article-content ul,
.article-content ol {
    margin: 1.1em 0;
    padding-left: 1.5em;
}

.article-content ul li,
.article-content ol li {
    margin: 0.45em 0;
}

.article-content img {
    height: auto;
    border-radius: var(--radius-md);
    margin: 1.5em 0;
}

.article-content blockquote {
    position: relative;
    margin: 1.6em 0;
    padding: 18px 24px 18px 28px;
    background: rgba(255, 255, 255, 0.035);
    border-left: 3px solid var(--blue);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: #d9e8fb;
}

.article-content blockquote p {
    margin: 0;
}

.article-content pre {
    margin: 1.5em 0;
    padding: 18px 20px;
    background: #050b17;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.7;
}

.article-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9em;
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 6px;
    color: #d8eeff;
}

.article-content pre code {
    background: transparent;
    padding: 0;
}

.article-content table {
    width: 100%;
    margin: 1.5em 0;
    border-collapse: collapse;
    font-size: 15px;
}

.article-content th,
.article-content td {
    border: 1px solid var(--line);
    padding: 10px 14px;
    text-align: left;
}

.article-content th {
    background: rgba(255, 255, 255, 0.05);
    color: var(--title);
}

.article-content hr {
    border: 0;
    height: 1px;
    background: var(--line);
    margin: 2.4em 0;
}

/* article footer */
.post-foot {
    margin-top: 52px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 13px;
    color: var(--mute);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
}

.post-foot span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.post-switch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

/* empty / not found */
.empty-section {
    padding: 120px 24px;
    min-height: 60vh;
}

.empty-panel {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    padding: 70px 38px;
    background: linear-gradient(140deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.empty-panel h1 {
    font-size: 30px;
    font-weight: 600;
    color: var(--title);
    margin-bottom: 20px;
}

.empty-panel .btn {
    min-width: 180px;
}

/* btn */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 50px;
    padding: 0 26px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: transform .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.btn:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue), var(--blue-deep));
    color: #fff;
    box-shadow: 0 0 0 1px rgba(125, 227, 255, 0.08), 0 10px 30px rgba(29, 111, 224, 0.24);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(125, 227, 255, 0.2), 0 16px 40px rgba(29, 111, 224, 0.35);
    background: linear-gradient(135deg, #3b97ff, var(--blue-deep));
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.22);
    color: var(--title);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(125, 227, 255, 0.45);
    transform: translateY(-2px);
}

.btn-sm {
    height: 42px;
    padding: 0 18px;
    font-size: 14px;
    border-radius: 8px;
}

/* sections */
.section {
    padding-top: var(--section);
    padding-bottom: var(--section);
}

.section-title-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 36px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--cyan);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 20px;
    height: 1px;
    background: var(--blue);
}

.section-title-row h2 {
    margin-top: 12px;
    font-size: clamp(27px, 3vw, 36px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--title);
}

.section-sub {
    max-width: 640px;
    margin-top: 12px;
    font-size: 16px;
    color: var(--body);
}

/* related cards */
.related-section {
    padding-top: 54px;
    padding-bottom: 84px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 10px;
}

.related-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(150deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: 0 6px 24px rgba(3, 8, 18, 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.related-card:hover {
    transform: translateY(-5px);
    border-color: var(--line-bright);
    box-shadow: 0 16px 40px rgba(3, 8, 18, 0.5);
}

.related-thumb {
    display: block;
    height: 190px;
    overflow: hidden;
}

.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}

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

.related-body {
    display: block;
    padding: 22px 22px 20px;
}

.related-label {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 99px;
    background: var(--blue-soft);
    color: #a5ddff;
    border: 1px solid rgba(46, 139, 255, 0.28);
    font-size: 12px;
    letter-spacing: 0.04em;
}

.related-name {
    display: block;
    margin: 14px 0 8px;
    font-size: 20px;
    font-weight: 600;
    line-height: 1.45;
    color: var(--title);
    transition: color .25s ease;
}

.related-card:hover .related-name {
    color: #fff;
}

.related-desc {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.8;
    color: var(--dim);
}

.related-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 18px;
    font-size: 14px;
    color: var(--cyan);
    transition: gap .25s ease;
}

.related-more em {
    font-style: normal;
    font-size: 16px;
    line-height: 1;
    transition: transform .25s ease;
}

.related-card:hover .related-more {
    gap: 8px;
}

.related-card:hover .related-more em {
    transform: translateX(3px);
}

/* FAQ */
.faq-section {
    background: linear-gradient(180deg, rgba(5, 10, 21, 0.2), rgba(7, 14, 27, 0.7));
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.faq-wrap {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 24px;
}

.faq-heading {
    text-align: center;
    margin-bottom: 46px;
}

.faq-heading .eyebrow {
    text-transform: none;
    justify-content: center;
}

.faq-heading h2 {
    margin-top: 14px;
    font-size: clamp(26px, 3vw, 34px);
    font-weight: 600;
    color: var(--title);
    line-height: 1.4;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.faq-item {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01));
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    transition: border-color .3s ease, background .3s ease;
}

.faq-item[open] {
    border-color: rgba(125, 227, 255, 0.3);
    background: rgba(255, 255, 255, 0.045);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    list-style: none;
    cursor: pointer;
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 500;
    color: var(--title);
    line-height: 1.6;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "";
    flex: 0 0 auto;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--cyan);
    border-bottom: 2px solid var(--cyan);
    transform: rotate(45deg);
    transition: transform .3s ease;
}

.faq-item[open] summary::after {
    transform: rotate(225deg);
}

.faq-answer {
    padding: 0 20px 20px;
    font-size: 14px;
    line-height: 1.85;
    color: var(--body);
}

.faq-answer p {
    padding-top: 2px;
}

/* cta */
.cta-section {
    padding: 76px 0;
}

.cta-panel {
    position: relative;
    overflow: hidden;
    max-width: 1080px;
    margin: 0 auto;
    padding: clamp(40px, 7vw, 76px);
    text-align: center;
    border-radius: 30px;
    border: 1px solid rgba(125, 227, 255, 0.22);
    background:
        radial-gradient(circle at 20% 20%, rgba(46, 139, 255, 0.2), transparent 42%),
        linear-gradient(140deg, rgba(46, 139, 255, 0.14), rgba(255, 255, 255, 0.02)),
        rgba(10, 18, 34, 0.8);
    box-shadow: 0 20px 60px rgba(3, 8, 18, 0.5);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.cta-panel h2 {
    font-size: clamp(28px, 3.6vw, 40px);
    line-height: 1.35;
    color: #fff;
    font-weight: 600;
    margin-bottom: 16px;
}

.cta-panel p {
    max-width: 640px;
    margin: 0 auto;
    font-size: 16px;
    color: var(--body);
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-top: 30px;
}

/* footer */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--line);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.7fr 1fr 1fr 1.2fr;
    gap: 46px;
}

.footer-brand .brand {
    margin-bottom: 14px;
}

.footer-brand p {
    max-width: 360px;
    font-size: 14px;
    line-height: 1.9;
    color: var(--dim);
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--title);
    margin-bottom: 18px;
    letter-spacing: 0.02em;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    font-size: 14px;
    color: var(--dim);
    transition: color .2s ease;
}

.footer-col a:hover {
    color: var(--cyan);
}

.footer-contact {
    font-size: 14px;
    color: var(--dim);
    line-height: 1.9;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 48px;
    padding: 20px 0 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 13px;
    color: var(--mute);
}

/* responsive */
@media (max-width: 1024px) {
    :root {
        --section: 80px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 900px) {
    .header-inner {
        padding: 0 16px;
    }
    .nav-toggle {
        display: inline-flex;
    }
    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        z-index: 120;
        height: 100vh;
        width: min(340px, 84vw);
        background: rgba(4, 10, 20, 0.97);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-left: 1px solid var(--line);
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 30px;
        transform: translateX(105%);
        transition: transform .35s ease;
        box-shadow: -20px 0 50px rgba(0, 0, 0, 0.3);
    }
    .main-nav.open {
        transform: translateX(0);
    }
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 10px;
    }
    .nav-list a {
        display: block;
        text-align: center;
        font-size: 18px;
        padding: 14px 14px;
        border-radius: var(--radius-sm);
        color: var(--dim);
    }
    .nav-list a:hover {
        background: rgba(255, 255, 255, 0.05);
    }
    .nav-list a.active {
        background: var(--blue-soft);
        color: #fff;
    }
    .nav-list a.active::after {
        display: none;
    }
    .related-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 760px) {
    .article-card {
        padding: 24px 20px;
        border-radius: 18px;
    }
    .article-section {
        padding-top: 28px;
    }
    .article-content {
        font-size: 16px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .faq-wrap {
        padding: 0 16px;
    }
    .post-switch {
        flex-direction: column;
        align-items: stretch;
    }
    .post-switch .btn {
        width: 100%;
    }
    .cta-section {
        padding: 30px 16px 50px;
    }
    .cta-panel {
        padding: 40px 20px;
    }
    .section {
        --section: 64px;
    }
    .section-title-row {
        flex-direction: column;
        align-items: flex-start;
    }
    .related-thumb {
        height: 180px;
    }
}

@media (max-width: 560px) {
    .container,
    .header-inner {
        padding-left: 16px;
        padding-right: 16px;
    }
    .brand-text {
        font-size: 17px;
    }
    .brand-mark {
        width: 38px;
        height: 38px;
    }
    .article-meta {
        gap: 8px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-brand {
        grid-column: span 1;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    .post-foot {
        flex-direction: column;
        align-items: flex-start;
    }
    .empty-panel {
        padding: 46px 20px;
    }
}

/* roulang page: category2 */
:root {
  --bg-deep: #050A16;
  --bg-body: #0A1326;
  --bg-soft: #0E1930;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.1);
  --line: rgba(140, 180, 220, 0.14);
  --primary: #2E8BFF;
  --primary-deep: #1D6FE0;
  --primary-light: #67C7FF;
  --cyan: #7DE3FF;
  --title: #F4F9FF;
  --text: #C5D6EC;
  --muted: #8FA7C3;
  --disabled: #58718F;
  --warning: #FFB648;
  --success: #3DD68C;
  --danger: #FF6B81;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(2, 8, 20, 0.5), 0 1px 0 rgba(255, 255, 255, 0.06) inset;
  --gap: 24px;
  --space-section: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-body);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", "system-ui", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.no-scroll {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

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

button,
input {
  font-family: inherit;
  font-size: inherit;
}

ul,
ol,
p {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--title);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(38px, 5vw, 54px);
}

h2 {
  font-size: clamp(28px, 3vw, 36px);
}

h3 {
  font-size: 22px;
  font-weight: 500;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(6, 12, 24, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(130, 170, 220, 0.12);
}

.header-inner {
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding-inline: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(46, 139, 255, 0.25), rgba(46, 139, 255, 0.08));
  border: 1px solid rgba(120, 210, 255, 0.3);
  color: var(--primary-light);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 0 22px rgba(46, 139, 255, 0.14);
}

.brand-text {
  color: var(--title);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  position: relative;
  display: inline-block;
  padding: 10px 0;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.02em;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--title);
  outline: none;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  opacity: 0.75;
  transform: scaleX(0.9);
}

.main-nav a.active {
  color: var(--title);
}

.main-nav a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--title);
  border-radius: 4px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(5, 10, 22, 0.96);
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu-panel {
  position: relative;
  height: 100%;
  padding: 24px;
  overflow-y: auto;
}

.mobile-menu-panel .mobile-nav-list {
  margin-top: 72px;
}

.mobile-menu-panel .mobile-nav-list a {
  display: block;
  padding: 14px 4px;
  font-size: 24px;
  color: var(--text);
}

.mobile-menu-panel .mobile-nav-list a.active {
  color: var(--title);
}

.mobile-menu-panel .mobile-nav-list a.active::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 12px;
  border-radius: 50%;
  background: var(--cyan);
  vertical-align: middle;
}

.mobile-close {
  position: absolute;
  top: 16px;
  right: 20px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  color: var(--title);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.mobile-close:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

.page-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(100deg, rgba(5, 10, 22, 0.94) 0%, rgba(8, 18, 35, 0.82) 56%, rgba(8, 20, 40, 0.64) 100%),
    url("/assets/images/backpic/back-1.png") center center / cover no-repeat;
  border-bottom: 1px solid rgba(120, 190, 255, 0.1);
}

.hero-inner {
  width: 100%;
  padding-block: 80px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 14px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--primary-light);
  outline: none;
}

.breadcrumb .sep {
  color: var(--disabled);
}

.breadcrumb span[aria-hidden="true"] {
  color: var(--primary-light);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(125, 227, 255, 0.8);
}

.page-hero h1 {
  max-width: 760px;
}

.hero-lead {
  max-width: 680px;
  margin-top: 24px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  color: #fff;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid rgba(130, 210, 255, 0.16);
  box-shadow: 0 10px 30px rgba(29, 111, 224, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover,
.btn:focus-visible {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  box-shadow: 0 16px 38px rgba(46, 139, 255, 0.46);
  transform: translateY(-2px);
  outline: none;
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: none;
  color: var(--title);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(125, 227, 255, 0.5);
  box-shadow: 0 8px 22px rgba(3, 10, 22, 0.28);
  color: var(--title);
}

.section {
  padding-block: var(--space-section);
}

.section-head {
  max-width: 820px;
  margin-bottom: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--primary-light);
  letter-spacing: 0.08em;
  font-size: 13px;
  font-weight: 500;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--primary);
}

.section-head h2 {
  margin-bottom: 18px;
}

.section-head p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
  max-width: 760px;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: start;
}

.intro-copy h2 {
  margin-bottom: 22px;
}

.intro-copy p {
  max-width: 680px;
  color: var(--text);
  line-height: 1.9;
  margin-bottom: 20px;
}

.intro-copy p:last-child {
  margin-bottom: 0;
}

.glass-note {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.glass-note::before {
  content: "";
  position: absolute;
  top: -1px;
  right: 30px;
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan));
  border-radius: 2px;
}

.glass-note h3 {
  margin-bottom: 14px;
}

.glass-note p {
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
}

.feature-section {
  background: linear-gradient(180deg, rgba(6, 12, 24, 0.5), rgba(4, 8, 18, 0.4));
  border-block: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
}

.feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 320px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--glass-border);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 12px 34px rgba(5, 10, 20, 0.24);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(120, 220, 255, 0.3);
  box-shadow: 0 22px 56px rgba(4, 12, 27, 0.45), 0 1px 0 rgba(255, 255, 255, 0.06) inset;
}

.feat-a {
  grid-column: span 7;
}

.feat-b {
  grid-column: span 5;
}

.feat-c {
  grid-column: span 5;
}

.feat-d {
  grid-column: span 7;
}

.feature-media {
  position: relative;
  height: 210px;
  overflow: hidden;
}

.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature-card:hover .feature-media img {
  transform: scale(1.03);
}

.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(2, 6, 14, 0.02) 0%, rgba(4, 10, 22, 0.15) 55%, rgba(3, 8, 18, 0.75) 100%);
  pointer-events: none;
}

.feature-body {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 28px 30px 26px;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 28px;
  padding: 4px 14px;
  margin-bottom: 16px;
  border-radius: 999px;
  background: rgba(46, 139, 255, 0.16);
  border: 1px solid rgba(125, 227, 255, 0.22);
  color: var(--cyan);
  font-size: 13px;
  line-height: 1.4;
}

.feature-body h3 {
  margin-bottom: 12px;
}

.feature-body p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 26px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--primary-light);
  font-weight: 500;
}

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

.feature-card:hover .card-link svg,
.card-link:hover svg {
  transform: translateX(4px);
}

.card-link:hover,
.card-link:focus-visible {
  color: #fff;
  outline: none;
}

.path-section {
  background: var(--bg-body);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 44px;
}

.path-step {
  position: relative;
  padding: 32px 26px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.path-step:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(125, 227, 255, 0.3);
  transform: translateY(-3px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46, 139, 255, 0.22), rgba(46, 139, 255, 0.07));
  border: 1px solid rgba(103, 210, 255, 0.24);
  color: var(--primary-light);
  font-feature-settings: "tnum";
  font-size: 18px;
  font-weight: 600;
}

.path-step h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.path-step p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.scene-section {
  background: linear-gradient(180deg, rgba(6, 12, 24, 0.5), rgba(4, 8, 18, 0.4));
  border-block: 1px solid var(--line);
}

.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.scene-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--bg-deep);
}

.scene-visual img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.scene-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.scene-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  align-items: start;
  padding: 22px 20px 22px 0;
  border-bottom: 1px solid var(--line);
}

.scene-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(46, 139, 255, 0.1);
  border: 1px solid rgba(125, 227, 255, 0.16);
  color: var(--cyan);
}

.scene-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.scene-item p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.scene-item a {
  color: var(--primary-light);
}

.scene-item a:hover,
.scene-item a:focus-visible {
  color: #fff;
  outline: none;
}

.tip-section {
  background: var(--bg-body);
}

.tip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.tip-card {
  padding: 30px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.tip-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  margin-bottom: 12px;
}

.tip-card h3 .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--primary-light);
  box-shadow: 0 0 12px rgba(46, 139, 255, 0.55);
}

.tip-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.faq-section {
  background: linear-gradient(180deg, rgba(6, 12, 24, 0.5), rgba(4, 8, 18, 0.4));
  border-block: 1px solid var(--line);
}

.faq-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.faq-intro h2 {
  margin-bottom: 18px;
}

.faq-intro p {
  color: var(--muted);
  line-height: 1.9;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.faq-item:first-child {
  border-top: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 4px;
  min-height: 72px;
  cursor: pointer;
  color: var(--title);
  font-size: 16px;
  font-weight: 500;
  list-style: none;
  transition: color 0.25s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--primary-light);
}

.faq-item summary::after {
  content: "";
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translateY(-3px);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.faq-item[open] summary::after {
  transform: rotate(-135deg) translateY(-3px);
  border-color: var(--cyan);
}

.faq-item summary:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
  border-radius: 6px;
}

.faq-answer {
  padding: 0 32px 26px 4px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.faq-answer p {
  max-width: 680px;
}

.cta-block {
  background: var(--bg-body);
  padding-block: 64px 80px;
}

.cta-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 62px 40px;
  border-radius: 28px;
  gap: 18px;
  background:
    radial-gradient(circle at 25% 0%, rgba(46, 139, 255, 0.2), transparent 42%),
    linear-gradient(145deg, rgba(15, 30, 56, 0.9), rgba(7, 14, 28, 0.95));
  border: 1px solid rgba(125, 227, 255, 0.16);
  box-shadow: 0 28px 80px rgba(2, 7, 15, 0.38);
  overflow: hidden;
}

.cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12%;
  width: 76%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(125, 227, 255, 0.5), transparent);
}

.cta-panel h2 {
  max-width: 720px;
}

.cta-panel p {
  max-width: 660px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 22px;
}

.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(140, 180, 220, 0.12);
  padding-top: 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.8fr 0.9fr;
  gap: 48px;
  padding-bottom: 54px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
  margin-top: 16px;
  max-width: 340px;
}

.footer-col h4 {
  margin-bottom: 22px;
  font-size: 16px;
  font-weight: 500;
  color: var(--title);
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col a {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--primary-light);
  outline: none;
}

.footer-contact li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 22px;
  border-top: 1px solid rgba(140, 180, 220, 0.1);
  color: var(--disabled);
  font-size: 13px;
}

@media (min-width: 992px) and (max-width: 1199px) {
  .container {
    padding-inline: 20px;
  }

  .header-inner {
    padding-inline: 20px;
  }
}

@media (max-width: 991px) {
  .main-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .feature-card {
    min-height: 300px;
  }

  .feat-a,
  .feat-b,
  .feat-c,
  .feat-d {
    grid-column: span 12;
  }

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

  .scene-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .scene-visual img {
    height: 360px;
  }

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

  .faq-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .cta-panel {
    padding: 48px 28px;
  }
}

@media (max-width: 767px) {
  :root {
    --space-section: 64px;
  }

  .container,
  .header-inner {
    padding-inline: 16px;
  }

  .site-header {
    height: 64px;
  }

  .brand-text {
    font-size: 17px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .page-hero {
    min-height: 480px;
  }

  .hero-inner {
    padding-block: 56px 48px;
  }

  .page-hero h1 {
    font-size: clamp(34px, 8vw, 46px);
  }

  .feature-grid,
  .path-grid,
  .tip-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-body {
    padding: 24px 22px;
  }

  .path-step,
  .tip-card {
    padding: 24px;
  }

  .scene-visual img {
    height: 280px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

@media (max-width: 480px) {
  .btn {
    width: 100%;
  }

  .hero-actions,
  .cta-actions {
    width: 100%;
  }

  .cta-panel {
    padding: 36px 20px;
  }

  .feature-card,
  .glass-note {
    border-radius: 16px;
  }

  .mobile-menu-panel .mobile-nav-list a {
    font-size: 21px;
  }
}

/* roulang page: category3 */
:root {
  --bg: #0A1326;
  --bg-deep: #050A16;
  --panel: #101E38;
  --line: rgba(255, 255, 255, 0.12);
  --glass: rgba(255, 255, 255, 0.04);
  --primary: #2E8BFF;
  --primary-deep: #1D6FE0;
  --cyan: #67C7FF;
  --cyan-light: #7DE3FF;
  --text: #F4F9FF;
  --body: #C5D6EC;
  --dim: #8FA7C3;
  --muted: #58718F;
  --radius-lg: 20px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(3, 8, 18, 0.6);
  --maxw: 1200px;
  --trans: 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

ul,
ol {
  list-style: none;
}

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

img {
  max-width: 100%;
  display: block;
  border: 0;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
}

h1,
h2,
h3,
h4 {
  color: var(--text);
  line-height: 1.3;
  font-weight: 600;
}

p {
  margin-bottom: 1em;
}

section {
  scroll-margin-top: 110px;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: clamp(64px, 8vw, 104px) 0;
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--cyan-light);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.7;
}

.section-head {
  margin-bottom: 48px;
  max-width: 760px;
}

.section-head h2 {
  font-size: clamp(28px, 3.4vw, 38px);
  margin: 12px 0 16px;
}

.section-head p {
  color: var(--dim);
  font-size: 16px;
}

/* 顶栏 */
.site-header {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  background: rgba(5, 10, 22, 0.2);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.site-header.is-scrolled {
  background: rgba(5, 10, 22, 0.86);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  min-height: 72px;
  margin: 0 auto;
  padding: 10px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
  white-space: nowrap;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary-deep), var(--cyan));
  box-shadow: 0 6px 18px rgba(46, 139, 255, 0.26);
}

.main-nav {
  margin-left: 24px;
  flex: 1;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 34px;
}

.nav-list a {
  position: relative;
  color: var(--dim);
  font-size: 15px;
  line-height: 30px;
  padding: 4px 2px;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.nav-list a:hover {
  color: var(--text);
}

.nav-list a.active {
  color: var(--text);
}

.nav-list a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--cyan-light));
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.nav-list a.active:hover::after {
  width: 30px;
}

.nav-toggle {
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 36px;
  padding: 4px;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: var(--trans);
}

.site-header.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-header.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-icon {
  font-size: 18px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary-deep), var(--primary));
  box-shadow: 0 10px 26px rgba(46, 139, 255, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2276E8, #3D9CFF);
  box-shadow: 0 14px 34px rgba(46, 139, 255, 0.4);
  color: #fff;
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--cyan-light);
  transform: translateY(-2px);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan-light);
  transition: gap 0.3s ease, color 0.25s ease;
}

.text-link:hover {
  gap: 10px;
  color: #fff;
}

/* 页面Banner */
.page-banner {
  position: relative;
  padding: calc(84px + 4vw) 0 72px;
  background:
    linear-gradient(290deg, rgba(5, 10, 22, 0.98) 20%, rgba(7, 18, 38, 0.86) 45%, rgba(16, 30, 56, 0.66) 100%),
    url("/assets/images/backpic/back-1.png") center right / cover no-repeat;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  left: -120px;
  top: -180px;
  background: radial-gradient(circle, rgba(46, 139, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 22px;
}

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

.breadcrumb span {
  color: var(--muted);
}

.breadcrumb .current {
  color: var(--body);
}

.banner-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 42px;
  align-items: center;
}

.banner-copy {
  max-width: 620px;
}

.banner-copy h1 {
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 10px 0 18px;
}

.lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--body);
  margin-bottom: 30px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip,
.hero-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--body);
  font-size: 13px;
  white-space: nowrap;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.hero-glass {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: 12px;
}

.hero-glass-media {
  border-radius: 16px;
  overflow: hidden;
  background: #0B1626;
}

.hero-glass-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.hero-glass-body {
  padding: 22px 18px 16px;
}

.hero-glass-body p {
  color: var(--body);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* 通用玻璃卡 */
.glass-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  transition: transform 0.32s ease, border-color 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(128, 220, 255, 0.32);
}

/* 导览区 */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.intro-copy h2 {
  font-size: clamp(28px, 3vw, 36px);
  margin: 12px 0 22px;
}

.intro-copy p {
  color: var(--body);
  margin-bottom: 14px;
}

.intro-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

.intro-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 12px;
  color: var(--dim);
  font-size: 14px;
}

.intro-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 99px;
  margin-top: 10px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(103, 199, 255, 0.5);
}

.intro-card {
  position: relative;
  overflow: hidden;
}

.intro-card-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  background: #0C1B30;
}

.intro-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: rgba(12, 23, 43, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  gap: 20px;
}

.intro-card-bottom p {
  font-size: 14px;
  color: var(--body);
  margin: 0;
}

/* 分类信息服务区 */
.theme-section {
  background: linear-gradient(180deg, var(--bg-deep), rgba(9, 15, 32, 0.6) 48%, var(--bg));
}

.theme-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  grid-template-rows: auto auto;
  gap: 22px;
}

.topic-card-main {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 34px 32px;
  background:
    radial-gradient(circle at 90% 15%, rgba(46, 139, 255, 0.14), transparent 42%),
    linear-gradient(150deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015));
}

.topic-icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46, 139, 255, 0.2), rgba(103, 199, 255, 0.1));
  border: 1px solid rgba(103, 199, 255, 0.2);
  margin-bottom: 44px;
}

.topic-card h3 {
  font-size: 23px;
  margin: 10px 0 14px;
}

.topic-card p {
  color: var(--body);
  font-size: 15px;
}

.topic-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
}

.topic-meta .chip {
  min-height: 26px;
  padding: 0 10px;
  font-size: 12px;
}

.topic-card-main .topic-visual {
  border-radius: 16px;
  margin-top: 30px;
  background: #0A1521;
  overflow: hidden;
}

.topic-card-main .topic-visual img {
  width: 100%;
  height: 230px;
  object-fit: cover;
}

.topic-card-side {
  display: flex;
  flex-direction: column;
  padding: 24px 24px 20px;
}

.topic-card-side .topic-visual {
  border-radius: 14px;
  overflow: hidden;
  margin-top: 18px;
}

.topic-card-side .topic-visual img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.topic-side-stack {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.topic-divide {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  border: 0;
  margin: 18px 0 0;
}

/* 信息点列表区 */
.info-section {
  background: var(--bg-deep);
}

.info-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: center;
}

.info-call {
  position: relative;
  padding: 30px 30px 34px;
  background: linear-gradient(145deg, #101E38, rgba(10, 19, 38, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  width: 100%;
  overflow: hidden;
}

.info-call::before {
  content: "";
  position: absolute;
  left: -50px;
  top: -50px;
  width: 180px;
  height: 180px;
  background: rgba(46, 139, 255, 0.16);
  filter: blur(54px);
}

.info-call h3 {
  color: var(--text);
  font-size: 20px;
  margin: 12px 0 14px;
  position: relative;
}

.info-call p {
  color: var(--dim);
  font-size: 15px;
  position: relative;
}

.info-note-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.info-note-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 18px;
}

.info-note-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.info-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  border: 1px solid rgba(103, 199, 255, 0.2);
  background: rgba(103, 199, 255, 0.08);
}

.info-note-item h4 {
  font-size: 17px;
  margin-bottom: 5px;
}

.info-note-item p {
  font-size: 14px;
  color: var(--dim);
  margin-bottom: 6px;
}

.info-note-item .text-link {
  font-size: 14px;
}

/* 路径区 */
.path-section {
  background: var(--bg);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 26px;
}

.path-item {
  padding: 28px 22px 24px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  position: relative;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.path-item:hover {
  border-color: rgba(103, 199, 255, 0.25);
  transform: translateY(-4px);
}

.path-step {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: 30px;
  line-height: 1;
}

.path-item h3 {
  font-size: 17px;
  margin: 40px 0 10px;
}

.path-item p {
  font-size: 14px;
  color: var(--dim);
  margin-bottom: 0;
}

/* CTA区 */
.cta-section {
  position: relative;
  background:
    linear-gradient(115deg, rgba(5, 10, 22, 0.96), rgba(9, 18, 40, 0.82)),
    url("/assets/images/backpic/back-2.webp") center / cover no-repeat;
  padding: 72px 0 80px;
}

.cta-inner {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 16px 0 18px;
}

.cta-inner p {
  color: var(--dim);
  margin-bottom: 34px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* FAQ */
.faq-section {
  background: var(--bg-deep);
}

.faq-wrap {
  max-width: 980px;
  margin: 20px auto 0;
}

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.3s ease;
}

.faq-item:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: 0;
  padding: 24px 6px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
}

.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  margin-left: 24px;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 11px;
  left: 4px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 0.35s ease;
}

.faq-icon::after {
  transform: rotate(90deg);
}

.faq-item.open .faq-icon::after {
  transform: rotate(0deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease;
}

.faq-answer-inner {
  padding: 0 36px 24px 6px;
  color: var(--dim);
  font-size: 15px;
  line-height: 1.85;
}

/* 页脚 */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 0.9fr 1fr;
  gap: 42px;
  padding-bottom: 42px;
}

.footer-brand .brand {
  font-size: 18px;
}

.footer-brand p {
  margin-top: 18px;
  color: var(--dim);
  font-size: 14px;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-col li {
  margin-bottom: 11px;
}

.footer-col a,
.footer-contact li {
  font-size: 14px;
  color: var(--dim);
}

.footer-col a:hover {
  color: var(--cyan-light);
}

.footer-contact li {
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 13px;
}

/* 响应式 */
@media (max-width: 1060px) {
  .path-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 16px;
    right: 16px;
    display: none;
    margin: 0;
    padding: 16px;
    background: rgba(8, 17, 34, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }

  .site-header.nav-open .main-nav {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-list a {
    display: block;
    padding: 12px 12px;
    font-size: 16px;
    border-radius: 12px;
  }

  .nav-list a:hover,
  .nav-list a.active {
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-list a.active::after {
    display: none;
  }

  .banner-grid,
  .intro-grid,
  .info-grid,
  .theme-grid {
    grid-template-columns: 1fr;
  }

  .topic-card-main {
    grid-row: auto;
  }

  .intro-card-img {
    height: 330px;
  }

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

@media (max-width: 640px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-inner {
    padding: 8px 16px;
  }

  .brand {
    font-size: 17px;
  }

  .page-banner {
    padding-top: 130px;
    padding-bottom: 52px;
  }

  .banner-copy h1 {
    font-size: 38px;
  }

  .action-row .btn {
    width: 100%;
  }

  .hero-glass-media img {
    height: 200px;
  }

  .intro-card-img {
    height: 260px;
  }

  .intro-list,
  .path-grid {
    grid-template-columns: 1fr;
  }

  .topic-card-main {
    padding: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
    justify-content: flex-start;
  }

  .info-call,
  .topic-card-side {
    padding: 22px;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

/* roulang page: category4 */
:root{
  --bg-deep:#050A16;
  --bg-main:#0A1326;
  --bg-card:#101E38;
  --bg-soft:rgba(255,255,255,0.035);
  --text-title:#F4F9FF;
  --text-body:#C5D6EC;
  --text-muted:#8FA7C3;
  --text-weak:#58718F;
  --blue:#2E8BFF;
  --blue-deep:#1D6FE0;
  --blue-light:#67C7FF;
  --cyan-light:#7DE3FF;
  --success:#3DD68C;
  --warning:#FFB648;
  --danger:#FF6B81;
  --line:rgba(120,220,255,0.2);
  --border:rgba(255,255,255,0.12);
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-main:0 12px 40px rgba(3,8,18,0.6), 0 1px 0 rgba(255,255,255,0.08);
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text-body);
  background:
    radial-gradient(ellipse 900px 560px at 80% -8%, rgba(46,139,255,0.16), transparent 60%),
    radial-gradient(ellipse 1100px 700px at 6% 18%, rgba(125,227,255,0.06), transparent 55%),
    var(--bg-main);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{color:var(--text-title);line-height:1.3;font-weight:600}
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan-light);outline-offset:4px;border-radius:6px}

.skip-link{position:absolute;left:12px;top:12px;z-index:200;background:#101e38;color:#fff;padding:10px 16px;border-radius:8px;transform:translateY(-140%);transition:transform .25s}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:fixed;
  top:0;left:0;
  width:100%;
  z-index:100;
  transition:background .3s,border-color .3s,box-shadow .3s;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(5,10,22,0.78);
  border-color:rgba(255,255,255,0.07);
  box-shadow:0 8px 32px rgba(3,8,18,0.35);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-title);
  font-size:20px;
  font-weight:600;
  line-height:1.2;
  white-space:nowrap;
  letter-spacing:.01em;
}
.brand-mark{
  width:36px;height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex:none;
  border-radius:11px;
  font-size:18px;
  font-weight:600;
  background:linear-gradient(135deg,rgba(46,139,255,.22),rgba(29,111,224,.12));
  border:1px solid rgba(123,220,255,.3);
  color:#fff;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 6px 16px rgba(29,111,224,.2);
}
.main-nav .nav-list{display:flex;align-items:center;gap:6px}
.main-nav .nav-list a{
  display:block;
  padding:8px 12px;
  font-size:15px;
  color:var(--text-muted);
  border-radius:8px;
  position:relative;
  transition:color .25s,background .25s;
}
.main-nav .nav-list a:hover{color:var(--text-title);background:rgba(255,255,255,.045)}
.main-nav .nav-list a.active{color:#fff}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  position:relative;
  z-index:110;
  border:1px solid rgba(255,255,255,.18);
  border-radius:12px;
  background:rgba(255,255,255,.05);
  cursor:pointer;
  padding:0;
  transition:border-color .25s,background .25s;
}
.nav-toggle:hover{border-color:rgba(120,220,255,.45);background:rgba(255,255,255,.1)}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:#eaf4ff;
  transition:transform .3s,opacity .3s;
}

.page-hero{
  position:relative;
  padding:148px 0 108px;
  overflow:hidden;
  background:
    linear-gradient(120deg,rgba(5,10,22,0.92) 10%,rgba(10,19,38,0.85) 60%,rgba(5,10,22,.88)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.page-hero::before{
  content:"";
  position:absolute;
  left:-10%;
  bottom:-40%;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(46,139,255,.16),transparent 65%);
  pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:80px;align-items:center}
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:32px;font-size:14px;color:var(--text-weak)}
.breadcrumb a{color:var(--text-muted);transition:color .25s}
.breadcrumb a:hover{color:var(--cyan-light)}
.breadcrumb span{color:var(--text-weak)}
.hero-kicker{
  color:var(--cyan-light);
  font-size:14px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:none;
  margin-bottom:10px;
}
.page-hero h1{
  font-size:clamp(40px,5vw,58px);
  color:var(--text-title);
  font-weight:600;
  line-height:1.2;
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  max-width:560px;
  color:var(--text-body);
  line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:18px;margin-top:34px}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:12px 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:500;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s,box-shadow .25s,background .25s,border-color .25s,color .25s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#2b84ff,#1d6fe0);
  box-shadow:0 10px 24px rgba(29,111,224,.24),inset 0 1px 0 rgba(255,255,255,.12);
}
.btn-primary:hover{background:linear-gradient(135deg,#3a93ff,#2676eb);box-shadow:0 12px 30px rgba(29,111,224,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(29,111,224,.25)}
.btn-ghost{
  color:var(--text-title);
  background:rgba(255,255,255,0.04);
  border-color:rgba(255,255,255,.22);
}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(120,220,255,.4)}
.btn-ghost:active{transform:translateY(0)}

.glass-card{
  background:linear-gradient(135deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px 30px;
  box-shadow:var(--shadow-main);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.panel-label{font-size:13px;color:var(--cyan-light);letter-spacing:.12em;margin-bottom:18px}
.panel-list{display:grid;gap:14px}
.panel-item{
  display:flex;
  align-items:flex-start;
  gap:11px;
  font-size:15px;
  color:var(--text-body);
}
.panel-item::before{
  content:"✓";
  display:flex;
  align-items:center;
  justify-content:center;
  width:22px;height:22px;
  margin-top:2px;
  flex:none;
  border-radius:50%;
  font-size:12px;
  color:#021430;
  background:linear-gradient(135deg,#7DE3FF,#67C7FF);
}

.section{padding:100px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head.center{flex-direction:column;align-items:center;text-align:center}
.eyebrow{color:var(--cyan-light);font-size:14px;letter-spacing:.18em;margin-bottom:12px}
.section-head h2,.section-head.center h2{font-size:clamp(28px,3.2vw,38px);margin-bottom:10px}
.section-head .section-desc{max-width:560px;color:var(--text-muted);font-size:15px}
.section-head.center .section-desc{max-width:640px}
.section-note{font-size:15px;color:var(--text-muted);margin-top:6px}

.topic-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:stretch}
.topic-main{display:flex;flex-direction:column;gap:24px}
.topic-side{display:grid;grid-template-rows:auto auto;gap:24px}
.help-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid rgba(255,255,255,.10);
  border-radius:20px;
  padding:27px 28px;
  transition:transform .3s,border-color .3s,box-shadow .3s;
  overflow:hidden;
}
.help-card:hover{transform:translateY(-4px);border-color:rgba(120,220,255,.3);box-shadow:0 14px 40px rgba(3,8,18,.45)}
.help-card--feature{
  display:grid;
  grid-template-columns:.92fr 1.08fr;
  padding:0;
  min-height:260px;
}
.help-card-media{
  min-height:190px;
  background:#0d1b33;
  position:relative;
  overflow:hidden;
}
.help-card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,rgba(5,10,22,0.05),rgba(5,10,22,0.32));
}
.help-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.help-card--feature:hover .help-card-media img{transform:scale(1.03)}
.help-card-content{padding:28px 30px;display:flex;flex-direction:column}
.tag{
  display:inline-flex;
  align-items:center;
  width:max-content;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--cyan-light);
  background:rgba(46,139,255,0.13);
  border:1px solid rgba(46,139,255,.3);
  margin-bottom:17px;
}
.tag--cyan{
  color:#d6f7ff;
  background:rgba(125,227,255,.1);
  border-color:rgba(125,227,255,.26);
}
.help-card h3{font-size:21px;line-height:1.45;margin-bottom:13px;font-weight:500}
.help-card p{
  font-size:15px;
  line-height:1.85;
  color:var(--text-body);
  margin-bottom:20px;
}
.help-card--feature p{max-width:520px}
.help-card--feature .btn{align-self:flex-start;min-height:44px;margin-top:auto;padding:10px 20px}
.help-card--horizontal{
  flex-direction:row;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.help-card--horizontal .help-card-content{max-width:70%}
.help-card--horizontal h3{margin-bottom:8px}
.help-card--vertical h3{font-size:19px;margin-bottom:10px}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  width:max-content;
  font-size:14px;
  font-weight:500;
  color:#eaf4ff;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .25s,border-color .25s,gap .25s;
}
.text-link span{transition:transform .25s;display:inline-block}
.text-link:hover{color:var(--cyan-light);border-color:rgba(125,227,255,.3)}
.text-link:hover span{transform:translateX(4px)}

.process-section{
  background:linear-gradient(180deg,rgba(16,30,56,.34),rgba(5,10,22,0.0) 15%,rgba(5,10,22,0) 85%,rgba(16,30,56,.2));
  border-top:1px solid rgba(255,255,255,.04);
  border-bottom:1px solid rgba(255,255,255,.04);
}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:16px}
.step-item{
  position:relative;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.09);
  border-radius:19px;
  padding:30px 26px 28px;
  overflow:hidden;
  transition:border-color .3s,transform .3s,background .3s;
}
.step-item::before{
  content:"";
  position:absolute;
  top:0;right:0;
  width:90px;height:90px;
  border-radius:0 0 0 90px;
  background:radial-gradient(circle at top right,rgba(46,139,255,.16),transparent 70%);
  pointer-events:none;
}
.step-item:hover{border-color:rgba(120,220,255,.28);transform:translateY(-3px)}
.step-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  margin-bottom:22px;
  border-radius:13px;
  color:var(--cyan-light);
  font-weight:600;
  font-variant-numeric:tabular-nums;
  font-size:17px;
  background:rgba(46,139,255,.12);
  border:1px solid rgba(46,139,255,.3);
}
.step-item h3{font-size:20px;margin-bottom:12px;font-weight:500}
.step-item p{font-size:15px;line-height:1.85;color:var(--text-muted)}

.faq-section{background:rgba(5,10,22,.2)}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px 20px;
  align-items:start;
}
.faq-item{
  background:linear-gradient(150deg,rgba(255,255,255,.035),rgba(255,255,255,.008));
  border:1px solid rgba(255,255,255,.09);
  border-radius:16px;
  overflow:hidden;
}
.faq-item[open]{border-color:rgba(120,220,255,.22);box-shadow:0 12px 28px rgba(3,8,18,.30)}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 20px;
  cursor:pointer;
  font-size:16px;
  font-weight:500;
  color:var(--text-title);
  list-style:none;
  user-select:none;
  transition:color .25s,background .25s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:rgba(255,255,255,.03);color:#fff}
.faq-sign{
  position:relative;
  flex:none;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid rgba(125,227,255,.35);
  background:rgba(46,139,255,.08);
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:var(--cyan-light);
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-sign::before{width:11px;height:1.5px}
.faq-sign::after{width:1.5px;height:11px}
.faq-item[open] .faq-sign::after{display:none}
.faq-answer{padding:2px 22px 22px;color:var(--text-muted);font-size:15px;line-height:1.9}
.faq-grid .faq-item:last-child{grid-column:1 / -1}

.cta-section{padding:40px 0 110px}
.cta-panel{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  padding:48px 50px;
  border-radius:26px;
  background:
    linear-gradient(125deg,rgba(29,111,224,.22),rgba(5,10,22,.7) 48%),
    rgba(255,255,255,.025);
  border:1px solid rgba(125,227,255,.18);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 16px 44px rgba(3,8,18,.4);
  position:relative;
  overflow:hidden;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-70px;top:-90px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(46,139,255,.20),transparent 65%);
  pointer-events:none;
}
.cta-content{max-width:620px;position:relative;z-index:2}
.cta-content h2{font-size:clamp(26px,3vw,34px);color:#fff;margin-bottom:14px}
.cta-content p{color:var(--text-body);font-size:15.5px;line-height:1.9}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;flex:none;position:relative;z-index:2}
.cta-actions .btn{min-width:150px}

.site-footer{
  background:var(--bg-deep);
  border-top:1px solid rgba(255,255,255,.08);
  padding:74px 0 36px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:42px;
  padding-bottom:58px;
}
.footer-brand>.brand{font-size:19px;margin-bottom:16px}
.footer-brand p{
  font-size:14.5px;
  line-height:1.9;
  color:var(--text-muted);
  max-width:330px;
  margin-top:14px;
}
.footer-col h4{
  font-size:14px;color:#dce8f8;font-weight:600;letter-spacing:.1em;
  margin-bottom:18px;
}
.footer-col ul li+li{margin-top:10px}
.footer-col ul a{font-size:15px;color:var(--text-muted);transition:color .25s}
.footer-col ul a:hover{color:var(--cyan-light)}
.footer-contact{line-height:1.9}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.07);
  padding-top:28px;
  display:flex;
  flex-direction:column;
  gap:7px;
  color:var(--text-weak);
  font-size:13px;
}

@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-contact,.footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:991px){
  .header-inner{padding-inline:20px}
  .main-nav{
    position:fixed;
    inset:0;
    height:100dvh;
    background:rgba(5,10,22,.97);
    backdrop-filter:blur(24px);
    -webkit-backdrop-filter:blur(24px);
    display:flex;
    align-items:center;
    justify-content:center;
    z-index:100;
    padding:0;
    opacity:0;
    visibility:hidden;
    transform:translateX(8%);
    transition:opacity .3s,visibility .3s,transform .3s;
  }
  .site-header.open .main-nav{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:center;gap:10px}
  .nav-list a{font-size:24px;color:var(--text-title);padding:13px 24px;border-radius:12px}
  .nav-list a:hover{background:rgba(255,255,255,.06)}
  .nav-toggle{display:inline-flex}
  .site-header.open .nav-toggle{border-color:rgba(125,227,255,.45)}
  .site-header.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .site-header.open .nav-toggle span:nth-child(2){opacity:0}
  .site-header.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero-grid{grid-template-columns:1fr;gap:52px}
  .page-hero{padding:130px 0 78px}
  .hero-panel{max-width:520px}
  .topic-grid{grid-template-columns:1fr}
  .help-card--horizontal{flex-direction:column;align-items:flex-start;gap:20px}
  .steps-grid{grid-template-columns:1fr}
  .cta-panel{flex-direction:column;align-items:flex-start;padding:38px 32px}
  .cta-actions{flex-direction:row}
  .section{padding:78px 0}
}
@media (max-width:767px){
  .container{padding-inline:16px}
  .header-inner{padding-inline:16px}
  .brand-text{font-size:18px}
  .hero-grid{gap:32px}
  .page-hero h1{font-size:38px;margin-bottom:16px}
  .hero-lead{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px}
  .hero-actions .btn{width:100%}
  .glass-card{padding:22px 20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:34px}
  .section{padding:62px 0}
  .topic-main,.topic-side{gap:16px}
  .topic-grid{gap:16px}
  .help-card{padding:24px 20px}
  .help-card--feature{display:block}
  .help-card-media{min-height:210px}
  .help-card-content{padding:24px 22px}
  .faq-grid{grid-template-columns:1fr}
  .faq-grid .faq-item:last-child{grid-column:auto}
  .cta-section{padding:24px 0 82px}
  .cta-panel{padding:30px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-bottom{padding-top:24px}
}
@media (max-width:480px){
  .brand-mark{width:32px;height:32px;font-size:16px}
  .brand-text{font-size:16px}
  .page-hero{padding-top:116px}
  .page-hero h1{font-size:32px}
  .hero-lead{font-size:15px}
  .help-card--horizontal .help-card-content{max-width:100%}
  .help-card::after{content:"";display:block;position:absolute;right:-34px;bottom:-34px;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,rgba(46,139,255,.13),transparent 70%);pointer-events:none}
}