/* roulang page: index */
:root {
  --bg: #060d18;
  --bg-2: #0a1424;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-border: rgba(255, 255, 255, 0.08);
  --primary: #0b1f3a;
  --primary-light: #102a4a;
  --accent: #22d3ee;
  --accent-rgb: 34, 211, 238;
  --gold: #f0b90b;
  --gold-rgb: 240, 185, 11;
  --text: #e6edf3;
  --text-weak: #8fa3bb;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 40px rgba(0, 0, 0, 0.35);
  --glow: 0 0 24px rgba(34, 211, 238, 0.35);
  --glow-gold: 0 0 24px rgba(240, 185, 11, 0.25);
  --transition: all .25s ease;
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: #7de5f7; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-tag {
  display: inline-block;
  background: rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: .1em;
  margin-bottom: 14px;
}
.section-title { font-size: 34px; font-weight: 700; line-height: 1.35; margin-bottom: 14px; color: #f0f6fb; }
.section-desc { font-size: 16px; color: var(--text-weak); line-height: 1.8; }
@media (max-width: 768px) {
  .section-title { font-size: 26px; }
  .section-desc { font-size: 15px; }
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(6, 13, 24, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(6, 13, 24, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: #f0f6fb;
  white-space: nowrap;
}
.nav-brand .logo-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.5), rgba(var(--gold-rgb), 0.4));
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.3);
  flex-shrink: 0;
}
.nav-brand span { font-size: 15px; letter-spacing: 0.02em; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-weak);
  border-radius: 999px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.nav-links a.active {
  color: #fff;
  background: rgba(var(--accent-rgb), 0.15);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
}
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-weak);
  min-width: 180px;
  cursor: text;
  transition: var(--transition);
}
.nav-search:hover { border-color: rgba(var(--accent-rgb), 0.3); }
.nav-search .kbd {
  background: rgba(255,255,255,0.1);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  color: var(--text-weak);
  margin-left: auto;
}
.nav-cta {
  background: linear-gradient(135deg, var(--accent), #0ea5e9);
  color: #0a1424;
  border: none;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: 999px;
  box-shadow: var(--glow);
  transition: var(--transition);
  white-space: nowrap;
  display: inline-block;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 4px 30px rgba(var(--accent-rgb), 0.5); color: #0a1424; }
.hamburger { display: none; background: none; border: 1px solid var(--surface-border); border-radius: 8px; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
@media (max-width: 900px) {
  .hamburger { display: flex; }
  .nav-search { display: none; }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(6, 13, 24, 0.96);
    backdrop-filter: blur(20px);
    padding: 16px 24px;
    border-bottom: 1px solid var(--surface-border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links a { padding: 12px 16px; font-size: 16px; }
  .nav-right .nav-cta { display: none; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  z-index: -2;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,13,24,0.85) 0%, rgba(6,13,24,0.72) 50%, rgba(6,13,24,0.9) 100%);
  z-index: -1;
}
.hero-content { width: 100%; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: .05em;
}
.hero-title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
  max-width: 780px;
}
.hero-title .highlight {
  background: linear-gradient(90deg, var(--accent), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}
.hero-subtitle {
  font-size: 17px;
  color: var(--text-weak);
  line-height: 1.8;
  max-width: 680px;
  margin-bottom: 40px;
}
.hero-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 999px;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0ea5e9);
  color: #0a1424;
  box-shadow: var(--glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 34px rgba(var(--accent-rgb), 0.5); color: #0a1424; }
.btn-outline {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-color: var(--surface-border);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(var(--accent-rgb), 0.4);
  color: #fff;
  transform: translateY(-2px);
}
.btn-block { width: 100%; }
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* 对比卡片 */
.compare-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 980px;
  margin-bottom: 40px;
}
.compare-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
}
.compare-card.dark { opacity: 0.75; }
.compare-card.dark:hover { opacity: 1; }
.compare-card.featured {
  background: rgba(var(--accent-rgb), 0.08);
  border-color: rgba(var(--accent-rgb), 0.4);
  box-shadow: 0 0 40px rgba(var(--accent-rgb), 0.15), var(--shadow);
  transform: translateY(-4px);
}
.compare-card.featured .badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: linear-gradient(135deg, var(--gold), #f59e0b);
  color: #0a1424;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  box-shadow: var(--glow-gold);
}
.compare-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-card-title .icon { font-size: 22px; }
.compare-card ul { list-style: none; }
.compare-card ul li {
  position: relative;
  padding: 8px 0 8px 24px;
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.6;
}
.compare-card ul li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: #94a3b8;
  font-weight: 700;
}
.compare-card.featured ul li::before {
  content: "✓";
  color: var(--accent);
}
.compare-card.featured ul li { color: #cbd5e1; }
.hero-data {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  border-top: 1px solid var(--surface-border);
  padding-top: 28px;
  max-width: 980px;
}
.hero-data .data-item { text-align: left; }
.hero-data .data-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  font-weight: 800;
}
.hero-data .data-label { font-size: 14px; color: var(--text-weak); margin-top: 2px; }

@media (max-width: 860px) {
  .hero { padding: 120px 0 80px; }
  .compare-cards { grid-template-columns: 1fr; }
  .compare-card.featured { transform: none; }
  .hero-data { gap: 24px; }
}

/* ===== 资源目录 ===== */
.resource-directory { background: rgba(255,255,255,0.02); border-top: 1px solid var(--surface-border); border-bottom: 1px solid var(--surface-border); }
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.resource-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.resource-card:hover { transform: translateY(-6px); border-color: rgba(var(--accent-rgb), 0.3); box-shadow: var(--shadow); }
.resource-cover {
  height: 160px;
  overflow: hidden;
  position: relative;
}
.resource-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.resource-card:hover .resource-cover img { transform: scale(1.05); }
.resource-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(6,13,24,0.6) 100%);
}
.resource-info { padding: 20px 20px 24px; display: flex; flex-direction: column; flex: 1; }
.resource-info h3 { font-size: 17px; font-weight: 700; color: #f0f6fb; margin-bottom: 8px; }
.resource-info p { font-size: 14px; color: var(--text-weak); line-height: 1.7; flex: 1; }
.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  margin-top: 12px;
}
.resource-link:hover { gap: 8px; }
@media (max-width: 1024px) { .resource-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .resource-grid { grid-template-columns: 1fr; } }

/* ===== 价值点 ===== */
.value-points { background: transparent; }
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 64px;
}
.value-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: left;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.value-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.value-card:hover::before { opacity: 1; }
.value-card:hover { transform: translateY(-4px); border-color: rgba(var(--accent-rgb), 0.25); box-shadow: var(--shadow); }
.value-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(var(--accent-rgb), 0.15);
  border: 1px solid rgba(var(--accent-rgb), 0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.value-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.value-card p { font-size: 15px; color: var(--text-weak); line-height: 1.8; }
.stats-bar {
  background: rgba(var(--accent-rgb), 0.06);
  border: 1px solid rgba(var(--accent-rgb), 0.15);
  border-radius: var(--radius);
  padding: 32px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  backdrop-filter: blur(8px);
}
.stat-item { text-align: center; }
.stat-num { font-size: 34px; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 14px; color: var(--text-weak); margin-top: 4px; }
@media (max-width: 768px) {
  .value-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

/* ===== 资讯 ===== */
.news-section { background: rgba(255,255,255,0.02); border-top: 1px solid var(--surface-border); border-bottom: 1px solid var(--surface-border); }
.news-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}
.news-list { display: flex; flex-direction: column; gap: 12px; }
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 22px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  transition: var(--transition);
}
.news-item:hover { border-color: rgba(var(--accent-rgb), 0.3); transform: translateX(6px); background: rgba(var(--accent-rgb), 0.05); }
.news-item .news-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  border-radius: 10px;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.news-item .news-title { flex: 1; font-size: 15px; color: var(--text); line-height: 1.6; transition: var(--transition); }
.news-item:hover .news-title { color: var(--accent); }
.news-item .news-tag { font-size: 12px; color: var(--text-weak); background: rgba(255,255,255,0.06); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.news-sidebar { display: flex; flex-direction: column; gap: 20px; }
.side-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 24px;
}
.side-card h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--surface-border); }
.side-card ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.side-card ul li { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-weak); transition: var(--transition); }
.side-card ul li:hover { color: var(--accent); }
.side-card ul li::before { content: "›"; color: var(--accent); font-size: 18px; line-height: 1; }
@media (max-width: 900px) {
  .news-wrap { grid-template-columns: 1fr; }
}

/* ===== 留资下载 ===== */
.lead-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}
.lead-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.jpg');
  background-size: cover;
  background-position: center;
  z-index: -2;
}
.lead-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 13, 24, 0.92);
  z-index: -1;
}
.lead-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.lead-left h2 { font-size: 32px; font-weight: 800; color: #fff; line-height: 1.35; margin-bottom: 16px; }
.lead-left p { font-size: 16px; color: var(--text-weak); line-height: 1.8; margin-bottom: 24px; }
.lead-points { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.lead-points li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: #cbd5e1; }
.lead-points li::before { content: "●"; color: var(--accent); font-size: 10px; margin-top: 8px; }
.lead-form {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 36px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}
.lead-form h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-group label { font-size: 13px; color: var(--text-weak); font-weight: 500; }
.form-group input,
.form-group select {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 15px;
  color: var(--text);
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
  background: rgba(255,255,255,0.07);
}
.form-group input::placeholder { color: rgba(255,255,255,0.25); }
.form-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath fill='%238fa3bb' d='M6 8L0 0h12z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; }
@media (max-width: 768px) {
  .lead-wrap { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(var(--accent-rgb), 0.2); }
.faq-item details > summary {
  list-style: none;
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: #f0f6fb;
  transition: var(--transition);
}
.faq-item details > summary::-webkit-details-marker { display: none; }
.faq-item details > summary::after {
  content: "+";
  font-size: 22px;
  color: var(--accent);
  font-weight: 400;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item details[open] > summary::after { transform: rotate(45deg); }
.faq-item details[open] > summary { border-bottom: 1px solid var(--surface-border); }
.faq-item .answer { padding: 18px 26px 22px; font-size: 15px; color: var(--text-weak); line-height: 1.8; }
@media (max-width: 520px) {
  .faq-item details > summary { padding: 18px; font-size: 16px; }
}

/* ===== 最终CTA ===== */
.final-cta {
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.12), rgba(var(--gold-rgb), 0.08));
  border-top: 1px solid rgba(var(--accent-rgb), 0.2);
  border-bottom: 1px solid rgba(var(--accent-rgb), 0.2);
  padding: 80px 0;
  text-align: center;
}
.final-cta h2 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 14px; line-height: 1.3; }
.final-cta p { font-size: 16px; color: var(--text-weak); max-width: 600px; margin: 0 auto 36px; line-height: 1.8; }
.final-cta .btn { font-size: 16px; padding: 16px 40px; }

/* ===== Footer ===== */
.site-footer {
  background: #040a12;
  border-top: 1px solid var(--surface-border);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .footer-logo { font-size: 18px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .footer-logo .logo-icon { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--accent), var(--gold)); display: inline-flex; align-items: center; justify-content: center; font-size: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-weak); line-height: 1.8; max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-weak); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 底部固定转化栏 ===== */
.bottom-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(6, 13, 24, 0.92);
  backdrop-filter: blur(16px);
  border-top: 1px solid rgba(var(--accent-rgb), 0.2);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}
.bottom-cta-bar.show { transform: translateY(0); }
.bottom-cta-bar .bar-text { font-size: 15px; font-weight: 600; color: var(--text); }
.bottom-cta-bar .bar-text span { color: var(--accent); }
.bottom-cta-bar .btn-sm { box-shadow: var(--glow); }
@media (max-width: 520px) {
  .bottom-cta-bar .bar-text { font-size: 13px; }
  .bottom-cta-bar { flex-direction: column; gap: 10px; padding: 12px 16px; }
}
/* ===== 通用 ===== */
::selection { background: rgba(var(--accent-rgb), 0.3); color: #fff; }
::-webkit-scrollbar { width: 10px; background: #0a1424; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: rgba(var(--accent-rgb), 0.3); }
body::-webkit-scrollbar { width: 10px; }

/* roulang page: category1 */
:root {
  --primary: #00d4aa;
  --primary-dark: #0aa88a;
  --primary-glow: rgba(0, 212, 170, 0.35);
  --primary-soft: rgba(0, 212, 170, 0.12);
  --accent-gold: #f5c542;
  --accent-gold-soft: rgba(245, 197, 66, 0.15);
  --bg-dark: #0a1628;
  --bg-deep: #070f1d;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.08);
  --text-light: #f0f6ff;
  --text-muted: #a3b5c8;
  --text-dim: #6b7f94;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 24px var(--primary-glow);
  --font: 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--text-light); }
.logo-icon { font-size: 30px; line-height: 1; filter: drop-shadow(0 0 8px rgba(0, 212, 170, 0.3)); }
.logo-text { letter-spacing: 1px; }
.nav-links { display: flex; align-items: center; gap: 32px; margin-left: 40px; }
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 4px;
  position: relative;
  transition: var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-light); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-search {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  padding: 6px 16px;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-search:hover { border-color: rgba(0, 212, 170, 0.4); color: var(--text-muted); }
.nav-search i { font-size: 13px; }
.nav-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #06251f;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 24px;
  border-radius: 999px;
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.25);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.nav-cta:hover {
  box-shadow: 0 0 28px rgba(0, 212, 170, 0.5);
  transform: translateY(-2px);
  color: #031712;
}
.nav-toggle { display: none; background: transparent; color: var(--text-light); font-size: 24px; cursor: pointer; border: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--bg-deep) 0%, #0d1f36 60%, #0a2a3a 100%);
  padding: 120px 0 100px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px; right: -120px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -80px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(245, 197, 66, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  border: 1px solid rgba(0, 212, 170, 0.25);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-badge .dot { width: 6px; height: 6px; background: var(--primary); border-radius: 50%; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 1px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #ffffff 60%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}
.hero-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #031712;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 999px;
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.3);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary:hover { box-shadow: 0 0 36px rgba(0, 212, 170, 0.55); transform: translateY(-3px); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid var(--border-glass);
  color: var(--text-light);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 999px;
  transition: var(--transition);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
/* Hero Panel */
.hero-panel {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 32px;
  box-shadow: var(--shadow);
  position: relative;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-glass);
}
.panel-title { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.live-dot { width: 8px; height: 8px; background: var(--primary); border-radius: 50%; box-shadow: 0 0 6px var(--primary); animation: pulse 1.5s infinite; }
.panel-status { font-size: 13px; color: var(--primary); background: var(--primary-soft); padding: 4px 12px; border-radius: 999px; display: flex; align-items: center; gap: 6px; }
.rank-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; }
.rank-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  transition: var(--transition);
  cursor: pointer;
}
.rank-item:hover { background: rgba(255, 255, 255, 0.07); border-color: rgba(0, 212, 170, 0.3); transform: translateX(4px); }
.rank-no {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-dim);
  min-width: 28px;
}
.rank-item:nth-child(1) .rank-no { color: var(--accent-gold); }
.rank-item:nth-child(2) .rank-no { color: var(--text-muted); }
.rank-item:nth-child(3) .rank-no { color: #cd8a4e; }
.rank-info { flex: 1; }
.rank-name { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.rank-tag { font-size: 11px; background: var(--primary-soft); color: var(--primary); padding: 2px 8px; border-radius: 999px; font-weight: 500; }
.rank-meta { font-size: 13px; color: var(--text-dim); margin-top: 2px; }
.rank-star { color: var(--accent-gold); font-size: 14px; display: flex; gap: 2px; }
.panel-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding-top: 20px; border-top: 1px solid var(--border-glass); }
.stat-cell { text-align: center; }
.stat-num { font-size: 28px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-label { font-size: 12px; color: var(--text-dim); margin-top: 4px; }

/* ===== Section Common ===== */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-deep); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-flex; align-items: center; gap: 8px; background: var(--primary-soft); color: var(--primary); font-size: 13px; font-weight: 600; padding: 6px 18px; border-radius: 999px; margin-bottom: 16px; }
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--text-light); line-height: 1.3; margin-bottom: 12px; }
.section-head p { font-size: 15px; color: var(--text-muted); line-height: 1.7; }

/* ===== Card Grid ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  opacity: 0;
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
  border-color: rgba(0, 212, 170, 0.25);
  background: rgba(255, 255, 255, 0.06);
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 56px; height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  border-radius: 14px;
  margin-bottom: 20px;
}
.card-icon i { font-size: 24px; color: var(--primary); }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-light); }
.card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== Steps ===== */
.steps-wrap { position: relative; } 
.steps-wrap::before {
  content: '';
  position: absolute;
  top: 28px; left: 60px; right: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, rgba(0,212,170,0.1) 100%);
  z-index: 0;
}
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; z-index: 1; }
.step-item { text-align: center; padding: 0 8px; }
.step-circle {
  width: 56px; height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  font-size: 22px;
  font-weight: 800;
  color: #031712;
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.3);
}
.step-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.step-item p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== Scenarios (image cards) ===== */
.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.scenario-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  transition: var(--transition);
}
.scenario-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4); border-color: rgba(0, 212, 170, 0.3); }
.scenario-img { height: 220px; overflow: hidden; position: relative; }
.scenario-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.scenario-card:hover .scenario-img img { transform: scale(1.05); }
.scenario-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 22, 40, 0.85) 100%);
}
.scenario-body { padding: 28px; }
.scenario-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.scenario-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 999px;
  transition: var(--transition);
}
.tag:hover { border-color: var(--primary); color: var(--primary); }

/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(135deg, var(--bg-deep) 0%, #0d1f36 100%);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 170, 0.4), transparent);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.stats-item .num { font-size: 48px; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 8px; }
.stats-item .num span { font-size: 24px; }
.stats-item .label { font-size: 15px; color: var(--text-muted); }
.stats-item .sub { font-size: 13px; color: var(--text-dim); margin-top: 6px; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(0, 212, 170, 0.3); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  background: transparent;
  color: var(--text-light);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
}
.faq-q .icon { color: var(--primary); font-size: 18px; transition: transform 0.3s; }
.faq-item.open .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  padding: 0 28px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 28px 22px; }

/* ===== CTA ===== */
.cta-section { padding: 110px 0; position: relative; overflow: hidden; }
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}
.cta-box {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 212, 170, 0.25);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 56px 48px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.cta-box h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; }
.cta-box p { font-size: 15px; color: var(--text-muted); margin-bottom: 32px; line-height: 1.7; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--border-glass); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-dim); line-height: 1.7; max-width: 340px; }
.footer-col h4 { font-size: 16px; font-weight: 700; margin-bottom: 18px; color: var(--text-light); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: var(--text-dim); transition: var(--transition); }
.footer-col ul a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Back to top ===== */
.fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #031712;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.4);
  font-size: 18px;
  transition: var(--transition);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
}
.fab.show { opacity: 1; pointer-events: auto; }
.fab:hover { transform: translateY(-4px); background: var(--primary-dark); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 80px 0 72px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav-links, .nav-right { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(20px);
    padding: 20px;
    gap: 0;
    border-bottom: 1px solid var(--border-glass);
    z-index: 100;
  }
  .nav-links.open a { padding: 14px 8px; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-links.open a::after { display: none; }
  .grid-3 { grid-template-columns: 1fr; gap: 20px; }
  .grid-4 { grid-template-columns: 1fr 1fr; gap: 16px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .steps-wrap::before { display: none; }
  .scenario-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero h1 { font-size: 30px; }
  .section-head h2 { font-size: 26px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-item .num { font-size: 36px; }
  .hero-panel { padding: 24px; }
}
@media (max-width: 520px) {
  .grid-4 { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; width: 100%; }
  .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
  .panel-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .stat-num { font-size: 22px; }
  .stats-item .num { font-size: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}