/* roulang page: index */
:root {
  --primary: #0f1d2e;
  --primary-light: #1c2e42;
  --accent: #f0a500;
  --accent-light: #ffd166;
  --bg-body: #f7f8fc;
  --bg-dark: #0c1622;
  --bg-deep: #09111c;
  --text-main: #1a2233;
  --text-muted: #5a6a7f;
  --text-faint: #9aa8b8;
  --border: #e5eaf0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 10px 32px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.10);
  --spacer: 96px;
  --font-head: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-head);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color 0.2s; }
img { max-width: 100%; height: auto; }
button:focus, a:focus, input:focus { outline: 2px solid rgba(240, 165, 0, 0.45); outline-offset: 2px; }
.container { width: 100%; max-width: 1240px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.section { padding: var(--spacer) 0; position: relative; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -0.02em; margin: 16px 0 12px; line-height: 1.2; }
.section-head p { color: var(--text-muted); font-size: 16px; margin: 0; }
.badge-custom {
  display: inline-block; background: rgba(240, 165, 0, 0.12); color: #b57900;
  font-size: 13px; font-weight: 600; padding: 6px 18px; border-radius: 40px; letter-spacing: 0.08em;
}

/* ===== Top Bar ===== */
.topbar { background: var(--bg-dark); color: rgba(255, 255, 255, 0.78); font-size: 13px; padding: 8px 0; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-left i { color: var(--accent); font-size: 12px; }
.topbar-right { display: flex; align-items: center; gap: 18px; }
.topbar-right a { color: rgba(255, 255, 255, 0.78); }
.topbar-right a:hover { color: var(--accent); }
.topbar-right .divider { width: 1px; height: 12px; background: rgba(255, 255, 255, 0.2); }

/* ===== Nav ===== */
.main-nav { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1030; box-shadow: var(--shadow-sm); }
.main-nav .container { display: flex; align-items: center; justify-content: space-between; min-height: 72px; }
.logo { font-size: 22px; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; letter-spacing: -0.01em; }
.logo .dot { width: 10px; height: 10px; background: var(--accent); border-radius: 3px; display: inline-block; transform: rotate(45deg); }
.logo:hover { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-menu li a {
  display: block; padding: 8px 18px; font-size: 15px; font-weight: 500; color: var(--text-muted);
  border-radius: 40px; transition: all 0.25s;
}
.nav-menu li a:hover { color: var(--primary); background: rgba(15, 29, 46, 0.05); }
.nav-menu li a.active { color: #fff; background: var(--primary); box-shadow: 0 4px 14px rgba(15, 29, 46, 0.25); }
.nav-cta { margin-left: 12px; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--primary); cursor: pointer; padding: 6px 8px; }

/* ===== Hero ===== */
.hero {
  min-height: 640px; display: flex; align-items: center; position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0a1420 0%, #12263d 60%, #0d1e30 100%);
}
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; opacity: 0.28; }
.hero-overlay { position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(15, 29, 46, 0.4) 0%, rgba(9, 17, 28, 0.92) 100%); }
.hero-inner { position: relative; z-index: 2; max-width: 780px; padding: 40px 0; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(240, 165, 0, 0.15);
  border: 1px solid rgba(240, 165, 0, 0.25); color: var(--accent-light); font-size: 13px; font-weight: 600;
  padding: 7px 18px; border-radius: 40px; letter-spacing: 0.06em; margin-bottom: 24px;
}
.hero-badge i { font-size: 12px; }
.hero h1 { font-size: 54px; font-weight: 900; color: #fff; letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 20px; }
.hero h1 .accent { color: var(--accent); }
.hero-lead { font-size: 18px; color: rgba(255, 255, 255, 0.72); max-width: 620px; margin-bottom: 36px; line-height: 1.7; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-hero {
  display: inline-flex; align-items: center; gap: 10px; padding: 15px 36px; border-radius: 50px;
  font-size: 15px; font-weight: 600; transition: all 0.3s; border: none; cursor: pointer;
}
.btn-hero-primary { background: var(--accent); color: #132028; box-shadow: 0 6px 24px rgba(240, 165, 0, 0.35); }
.btn-hero-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 10px 32px rgba(240, 165, 0, 0.4); }
.btn-hero-ghost { background: transparent; color: rgba(255, 255, 255, 0.9); border: 1.5px solid rgba(255, 255, 255, 0.35); }
.btn-hero-ghost:hover { border-color: var(--accent); color: var(--accent-light); transform: translateY(-2px); }
.hero-meta { display: flex; gap: 30px; margin-top: 40px; color: rgba(255, 255, 255, 0.55); font-size: 13px; flex-wrap: wrap; }
.hero-meta .item { display: flex; align-items: center; gap: 8px; }
.hero-meta i { color: var(--accent); }

/* ===== Feature Cards ===== */
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 38px 32px;
  height: 100%; transition: all 0.35s; position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform 0.4s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(240, 165, 0, 0.3); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 68px; height: 68px; border-radius: 18px; display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 24px; color: var(--primary); background: rgba(15, 29, 46, 0.06);
}
.feature-card:nth-child(2) .feature-icon { background: rgba(240, 165, 0, 0.12); color: #b57900; }
.feature-card:nth-child(3) .feature-icon { background: rgba(28, 120, 92, 0.1); color: #1d7d5f; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-muted); font-size: 15px; margin: 0; line-height: 1.7; }

/* ===== Category Cards ===== */
.cat-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden; height: 340px;
  display: flex; align-items: flex-end; box-shadow: var(--shadow-md); transition: transform 0.35s, box-shadow 0.35s;
}
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.cat-card .cat-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform 0.5s; }
.cat-card:hover .cat-bg { transform: scale(1.05); }
.cat-card .cat-mask { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(9, 17, 28, 0.1) 0%, rgba(9, 17, 28, 0.88) 100%); }
.cat-body { position: relative; z-index: 2; padding: 30px; color: #fff; }
.cat-body h3 { font-size: 23px; font-weight: 700; margin-bottom: 8px; }
.cat-body p { font-size: 14px; color: rgba(255, 255, 255, 0.75); margin-bottom: 18px; max-width: 360px; }
.cat-link {
  display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--accent);
  transition: gap 0.25s;
}
.cat-link:hover { gap: 14px; color: var(--accent-light); }

/* ===== Stats ===== */
.stats-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.stats-section::before {
  content: ""; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center; opacity: 0.18;
}
.stats-wrap { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; padding: 20px 0; }
.stat-item { padding: 20px; }
.stat-num { font-size: 48px; font-weight: 900; color: var(--accent); line-height: 1; margin-bottom: 10px; }
.stat-label { font-size: 14px; color: rgba(255, 255, 255, 0.6); letter-spacing: 0.04em; }

/* ===== News Section ===== */
.news-section { background: var(--bg-body); }
.news-card {
  background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden;
  height: 100%; transition: all 0.3s;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(240, 165, 0, 0.3); }
.news-card-link { display: flex; flex-direction: column; height: 100%; padding: 28px 26px; }
.news-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.badge-news {
  background: rgba(15, 29, 46, 0.07); color: var(--primary); font-size: 12px; font-weight: 600;
  padding: 4px 14px; border-radius: 30px; letter-spacing: 0.04em;
}
.news-card h3 { font-size: 18px; font-weight: 700; line-height: 1.45; margin-bottom: 12px; color: var(--text-main); }
.news-card h3:hover { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; flex: 1; margin: 0 0 20px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border); padding-top: 16px; font-size: 13px; color: var(--text-faint); }
.news-meta i { margin-right: 4px; }
.read-more { color: var(--primary); font-weight: 600; }
.read-more:hover { color: var(--accent); }
.empty-tip { text-align: center; padding: 60px 20px; background: #fff; border-radius: var(--radius-lg); color: var(--text-muted); font-size: 16px; }

/* ===== Steps ===== */
.steps-section { background: #fff; }
.step-item { text-align: center; padding: 20px; position: relative; }
.step-num {
  width: 62px; height: 62px; margin: 0 auto 20px; border-radius: 20px; background: var(--primary); color: #fff;
  font-size: 20px; font-weight: 800; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(15, 29, 46, 0.25); position: relative;
}
.step-item:not(:last-child)::after {
  content: ""; position: absolute; top: 51px; right: -10%; width: 20%; height: 2px;
  background: linear-gradient(90deg, rgba(240, 165, 0, 0.5), transparent);
}
.step-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-muted); max-width: 220px; margin: 0 auto; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-body); }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; margin-bottom: 14px; overflow: hidden; transition: box-shadow 0.3s; }
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer;
  font-weight: 600; font-size: 16px; color: var(--text-main); background: #fff; border: none; width: 100%; text-align: left;
}
.faq-q i { color: var(--accent); transition: transform 0.3s; flex-shrink: 0; margin-left: 16px; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; padding: 0 24px; }
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 22px; }
.faq-a p { color: var(--text-muted); font-size: 14px; line-height: 1.8; margin: 0; }

/* ===== CTA ===== */
.cta-section { position: relative; padding: 90px 0; background: var(--bg-deep); overflow: hidden; }
.cta-section::before {
  content: ""; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover; background-position: center; opacity: 0.22;
}
.cta-inner { position: relative; z-index: 1; text-align: center; max-width: 680px; margin: 0 auto; }
.cta-inner h2 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.cta-inner h2 span { color: var(--accent); }
.cta-inner p { color: rgba(255, 255, 255, 0.65); font-size: 17px; margin-bottom: 34px; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.footer { background: var(--bg-deep); color: rgba(255, 255, 255, 0.7); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; padding-bottom: 50px; }
.footer-brand .logo { color: #fff; margin-bottom: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.5); max-width: 320px; }
.footer h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 20px; letter-spacing: 0.03em; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.5); transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 24px 0; text-align: center;
  font-size: 13px; color: rgba(255, 255, 255, 0.35);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.45); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Float Button ===== */
.float-contact {
  position: fixed; bottom: 30px; right: 30px; width: 52px; height: 52px; border-radius: 50%;
  background: var(--accent); color: #132028; display: flex; align-items: center; justify-content: center;
  font-size: 20px; box-shadow: 0 8px 30px rgba(240, 165, 0, 0.4); z-index: 1040; transition: transform 0.3s;
}
.float-contact:hover { transform: translateY(-4px) scale(1.05); color: #132028; }

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .stats-wrap { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand { grid-column: 1 / -1; }
  .hero h1 { font-size: 42px; }
  .step-item:not(:last-child)::after { display: none; }
}
@media (max-width: 767px) {
  :root { --spacer: 64px; }
  .main-nav .container { min-height: 60px; }
  .nav-toggle { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 12px 20px 20px; box-shadow: 0 14px 30px rgba(0, 0, 0, 0.08);
    border-top: 1px solid var(--border); gap: 4px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li a { padding: 12px 16px; font-size: 15px; width: 100%; }
  .nav-menu li a.active { background: rgba(15, 29, 46, 0.06); color: var(--primary); box-shadow: none; }
  .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
  .nav-cta .btn-hero { width: 100%; justify-content: center; font-size: 14px; padding: 12px 20px; }
  .hero { min-height: 540px; }
  .hero h1 { font-size: 34px; }
  .hero-lead { font-size: 16px; }
  .hero-meta { gap: 16px; }
  .cat-card { height: 280px; }
  .section-head h2 { font-size: 27px; }
  .stats-wrap { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 40px; }
  .cta-inner h2 { font-size: 28px; }
  .topbar-right .hide-sm { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero-btns .btn-hero { width: 100%; justify-content: center; }
  .stats-wrap { grid-template-columns: 1fr; }
  .cat-card { height: 250px; }
  .faq-q { font-size: 15px; padding: 18px 18px; }
  .faq-a { padding: 0 18px; }
  .faq-item.open .faq-a { padding: 0 18px 18px; }
  .topbar { font-size: 12px; }
  .logo { font-size: 18px; }
}

/* roulang page: category1 */
:root {
  --primary: #6c4cf1;
  --primary-dark: #5233d9;
  --primary-light: #9d8aff;
  --accent: #00d2a8;
  --accent-glow: rgba(0, 210, 168, 0.35);
  --bg-dark: #0b0d1a;
  --bg-body: #f4f6fb;
  --bg-card: #ffffff;
  --bg-soft: #eef0f8;
  --text-main: #1b1f32;
  --text-muted: #636a85;
  --text-light: #9aa1b8;
  --border: #e3e7f0;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-main: 0 8px 30px rgba(20, 24, 60, 0.08);
  --shadow-hover: 0 14px 40px rgba(20, 24, 60, 0.14);
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
a:hover { color: var(--primary); }
.btn { border-radius: 10px; padding: 12px 28px; font-weight: 600; transition: var(--transition); }
.btn-primary { background: var(--primary); border: 1px solid var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(108, 76, 241, 0.35); }
.btn-outline-light { border: 2px solid rgba(255,255,255,0.6); color: #fff; border-radius: 10px; }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
.container { max-width: 1320px; padding-left: 20px; padding-right: 20px; }

.main-nav {
  background: rgba(11, 13, 26, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 20px;
}
.main-nav .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.main-nav .logo .dot {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
  flex-shrink: 0;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu li a {
  display: block;
  padding: 8px 18px;
  border-radius: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-menu li a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-menu li a.active { color: #fff; background: rgba(108, 76, 241, 0.35); }
.nav-toggle { display: none; background: transparent; border: 1px solid rgba(255,255,255,0.3); color: #fff; width: 42px; height: 42px; border-radius: 8px; font-size: 1.1rem; align-items: center; justify-content: center; }

.page-banner {
  position: relative;
  background: linear-gradient(135deg, #0b0d1a 0%, #171a35 50%, #1f1550 100%);
  padding: 120px 0 90px;
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -10%;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle, rgba(108,76,241,0.35) 0%, transparent 70%);
  pointer-events: none;
}
.page-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: 10%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0,210,168,0.2) 0%, transparent 70%);
  pointer-events: none;
}
.banner-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  pointer-events: none;
}
.page-banner .container { position: relative; z-index: 5; }
.banner-tag {
  display: inline-block;
  background: rgba(0, 210, 168, 0.2);
  border: 1px solid rgba(0, 210, 168, 0.4);
  color: #00e4b4;
  padding: 5px 14px;
  border-radius: 40px;
  font-size: 0.85rem;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.page-banner h1 { font-size: clamp(1.8rem, 4vw, 2.9rem); font-weight: 800; margin: 8px 0 16px; line-height: 1.3; }
.page-banner p { font-size: 1.05rem; color: rgba(255,255,255,0.75); max-width: 650px; }
.breadcrumb-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  margin-top: 20px;
  flex-wrap: wrap;
}
.breadcrumb-bar a { color: rgba(255,255,255,0.75); }
.breadcrumb-bar a:hover { color: var(--accent); }
.breadcrumb-bar .sep { color: rgba(255,255,255,0.3); }

.section {
  padding: 90px 0;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}
.section-head .sub-label {
  display: inline-block;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 2px;
  font-size: 0.85rem;
  margin-bottom: 10px;
}
.section-head h2 { font-size: 2rem; font-weight: 800; margin-bottom: 14px; letter-spacing: 0.5px; color: var(--text-main); }
.section-head p { color: var(--text-muted); font-size: 1rem; }

.entry-intro .intro-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-main);
  padding: 42px;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.intro-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(108,76,241,0.1), transparent 70%);
  border-radius: 50%;
}
.intro-card h3 { font-weight: 800; font-size: 1.4rem; margin-bottom: 14px; }
.intro-card p { color: var(--text-muted); margin-bottom: 18px; font-size: 1.02rem; }
.intro-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 26px;
}
.intro-point {
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid transparent;
}
.intro-point:hover { border-color: var(--primary); transform: translateY(-5px); box-shadow: var(--shadow-main); }
.intro-point i { font-size: 1.8rem; color: var(--primary); margin-bottom: 10px; }
.intro-point h5 { font-size: 1rem; font-weight: 700; }
.intro-point p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 26px;
}
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-main);
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(108,76,241,0.3); }
.article-card .card-img-wrap {
  height: 210px;
  overflow: hidden;
  position: relative;
}
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.article-card:hover .card-img-wrap img { transform: scale(1.06); }
.card-img-wrap .img-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(11,13,26,0.7);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 5px 12px;
  border-radius: 30px;
  font-size: 0.78rem;
  border: 1px solid rgba(255,255,255,0.2);
}
.card-img-wrap .play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.1rem;
  opacity: 0;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}
.article-card:hover .play-icon { opacity: 1; }
.article-card .card-body-cus { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.article-card .card-cat { color: var(--primary); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.5px; margin-bottom: 8px; }
.article-card h3 { font-size: 1.15rem; font-weight: 800; line-height: 1.4; margin-bottom: 10px; }
.article-card h3 a { color: var(--text-main); }
.article-card h3 a:hover { color: var(--primary); }
.article-card .card-desc { color: var(--text-muted); font-size: 0.92rem; flex: 1; margin-bottom: 16px; line-height: 1.65; }
.article-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  font-size: 0.82rem;
  color: var(--text-light);
}
.card-meta .meta-l { display: flex; align-items: center; gap: 14px; }
.card-meta i { font-size: 0.72rem; opacity: 0.7; }

.steps-section {
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
  color: #fff;
}
.steps-section::before {
  content: '';
  position: absolute;
  top: -20%;
  right: 20%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(108,76,241,0.3), transparent 70%);
  pointer-events: none;
}
.steps-section .container { position: relative; z-index: 5; }
.steps-section .section-head h2 { color: #fff; }
.steps-section .section-head p { color: rgba(255,255,255,0.6); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 20px;
}
.step-card {
  text-align: center;
  padding: 36px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
}
.step-card:hover { background: rgba(255,255,255,0.09); transform: translateY(-6px); border-color: rgba(0,210,168,0.4); }
.step-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
  box-shadow: 0 6px 20px rgba(108,76,241,0.4);
}
.step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
.step-card p { font-size: 0.88rem; color: rgba(255,255,255,0.65); margin: 0; line-height: 1.6; }

.hot-section { background: var(--bg-body); }
.hot-row {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(20,24,60,0.04);
}
.hot-row:hover { transform: translateX(6px); box-shadow: var(--shadow-main); border-color: rgba(108,76,241,0.3); }
.hot-rank {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  background: var(--bg-soft);
  color: var(--text-light);
}
.hot-row:first-of-type .hot-rank,
.hot-row:nth-of-type(2) .hot-rank,
.hot-row:nth-of-type(3) .hot-rank {
  background: linear-gradient(135deg, #ffd700, #ff9d00);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,180,0,0.3);
}
.hot-rank i { display: none; }
.hot-content { flex: 1; min-width: 0; }
.hot-content h4 { font-size: 1rem; font-weight: 700; margin: 0 0 4px; }
.hot-content p { color: var(--text-muted); font-size: 0.85rem; margin: 0; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; }
.hot-action { flex-shrink: 0; }
.hot-action a { color: var(--primary); font-size: 0.88rem; font-weight: 600; }
.hot-action a:hover { color: var(--primary-dark); }

.faq-section { background: var(--bg-card); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  background: #fafbff;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(108,76,241,0.3); box-shadow: 0 4px 16px rgba(20,24,60,0.06); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  list-style: none;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  transition: transform 0.3s ease;
  font-weight: 300;
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 22px 20px; color: var(--text-muted); font-size: 0.93rem; line-height: 1.75; }
.faq-item .faq-body a { color: var(--primary); font-weight: 600; }

.cta-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(135deg, #0b0d1a 0%, #1a1245 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0,210,168,0.25), transparent 70%);
  pointer-events: none;
}
.cta-content { position: relative; z-index: 5; max-width: 620px; margin: 0 auto; }
.cta-content h2 { font-size: 2rem; font-weight: 800; margin-bottom: 14px; }
.cta-content p { color: rgba(255,255,255,0.7); margin-bottom: 30px; font-size: 1.05rem; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.footer {
  background: #080a14;
  padding: 70px 0 30px;
  color: rgba(255,255,255,0.65);
}
.footer .logo { color: #fff; font-weight: 800; font-size: 1.2rem; display: inline-flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer .logo .dot { width: 10px; height: 10px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 10px var(--accent-glow); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.7fr 0.7fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.5); max-width: 360px; }
.footer h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 991px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 76px;
    right: 0;
    flex-direction: column;
    background: rgba(11,13,26,0.98);
    width: 260px;
    padding: 20px 16px;
    gap: 4px;
    border-left: 1px solid rgba(255,255,255,0.1);
    border-bottom-left-radius: 14px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -10px 20px 40px rgba(0,0,0,0.3);
    align-items: stretch;
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu li a { padding: 12px 16px; border-radius: 8px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .page-banner { padding: 90px 0 60px; }
  .article-grid { grid-template-columns: 1fr; }
  .entry-intro .intro-card { padding: 26px; }
  .cta-btns .btn { width: 100%; max-width: 280px; }
}

@media (max-width: 520px) {
  .main-nav .logo { font-size: 0.95rem; }
  .nav-menu { width: 220px; }
  .steps-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 1.5rem; }
  .hot-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .hot-action { align-self: flex-end; }
  .faq-item summary { font-size: 0.9rem; }
  .intro-points { grid-template-columns: 1fr; }
}

/* roulang page: article */
:root {
  --bg-body: #0a0e17;
  --bg-deep: #060a13;
  --bg-card: #121a2b;
  --bg-card-hover: #1b273d;
  --bg-soft: #0f1626;
  --primary: #6c63ff;
  --primary-light: #8f88ff;
  --primary-dark: #514ac7;
  --accent: #22d3ee;
  --gold: #f59e0b;
  --green: #34d399;
  --text-primary: #eef2f7;
  --text-regular: #c7d0dd;
  --text-secondary: #8a9ab0;
  --text-muted: #5c6b82;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 34px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.38);
  --gradient-brand: linear-gradient(135deg, #6c63ff 0%, #22d3ee 100%);
  --gradient-hero: linear-gradient(180deg, rgba(10, 14, 23, 0.45) 0%, rgba(10, 14, 23, 0.72) 55%, #0a0e17 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0) 100%);
  --spacing-section: 88px;
  --spacing-section-sm: 56px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition-base: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition-base);
}

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

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

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

ul, ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

::selection {
  background: rgba(108, 99, 255, 0.4);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: rgba(108, 99, 255, 0.35);
  border-radius: 20px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(108, 99, 255, 0.55);
}

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

/* ---------- 顶部信息条 ---------- */
.top-bar {
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-secondary);
  position: relative;
  z-index: 1010;
}

.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.top-bar-info {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.top-bar-info i {
  color: var(--green);
  font-size: 14px;
}

.top-bar-link {
  color: var(--text-secondary);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-base);
}

.top-bar-link:hover {
  color: var(--accent);
}

/* ---------- 主导航 ---------- */
.main-nav {
  background: rgba(10, 14, 23, 0.85);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0;
}

.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.3px;
  white-space: nowrap;
  transition: var(--transition-base);
}

.logo .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-brand);
  box-shadow: 0 0 12px rgba(108, 99, 255, 0.7);
  flex-shrink: 0;
}

.logo:hover {
  color: var(--text-primary);
  text-shadow: 0 0 18px rgba(108, 99, 255, 0.5);
}

.nav-toggle {
  display: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 22px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu > li > a {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-regular);
  transition: var(--transition-base);
  border: 1px solid transparent;
  white-space: nowrap;
}

.nav-menu > li > a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.nav-menu > li > a.active {
  color: #fff;
  background: var(--gradient-brand);
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(108, 99, 255, 0.35);
  font-weight: 600;
}

/* ---------- 文章 Hero ---------- */
.article-hero {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  padding: 100px 0 64px;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
}

.article-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-base);
}

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

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

.breadcrumb-nav .current {
  color: var(--text-primary);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px 14px;
  border-radius: 30px;
  font-size: 13px;
  border: 1px solid var(--border-light);
}

.article-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  max-width: 820px;
  margin-bottom: 24px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.5px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-regular);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-light);
  padding: 6px 16px;
  border-radius: 30px;
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
}

.meta-item i {
  color: var(--accent);
}

.meta-item:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

/* ---------- 正文主体 ---------- */
.article-main {
  padding: var(--spacing-section) 0 64px;
  background: var(--bg-body);
}

.article-main .row {
  gap: 32px 0;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
}

.article-body {
  font-size: 16px;
  color: var(--text-regular);
  line-height: 1.9;
}

.article-body > *:first-child {
  margin-top: 0;
}

.article-body p {
  margin-bottom: 1.6em;
}

.article-body h2,
.article-body h3,
.article-body h4 {
  color: var(--text-primary);
  font-weight: 700;
  margin-top: 2.2em;
  margin-bottom: 0.85em;
  line-height: 1.4;
}

.article-body h2 {
  font-size: 26px;
  border-left: 4px solid var(--primary);
  padding-left: 16px;
}

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

.article-body ul,
.article-body ol {
  margin-bottom: 1.6em;
  padding-left: 1.4em;
}

.article-body ul li,
.article-body ol li {
  margin-bottom: 0.5em;
  position: relative;
  padding-left: 6px;
}

.article-body ul li::before {
  content: '';
  position: absolute;
  left: -18px;
  top: 0.78em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gradient-brand);
}

.article-body img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  margin: 1.8em 0;
}

.article-body a {
  color: var(--accent);
  border-bottom: 1px dashed rgba(34, 211, 238, 0.5);
}

.article-body a:hover {
  color: var(--primary-light);
  border-bottom-color: var(--primary-light);
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(108, 99, 255, 0.08);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.8em 0;
  color: var(--text-regular);
  font-style: italic;
}

.article-divider {
  margin: 40px 0;
  border: none;
  height: 1px;
  background: var(--border);
  position: relative;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition-base);
}

.sidebar-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.sidebar-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-card h4::before {
  content: '';
  width: 4px;
  height: 18px;
  border-radius: 4px;
  background: var(--gradient-brand);
  flex-shrink: 0;
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-list li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.sidebar-list li:last-child {
  border-bottom: none;
}

.sidebar-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  color: var(--text-regular);
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.sidebar-list a i {
  color: var(--text-muted);
  font-size: 12px;
  transition: var(--transition-base);
}

.sidebar-list a:hover {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.04);
  padding-left: 14px;
}

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

.sidebar-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(108, 99, 255, 0.15);
  color: var(--primary-light);
  border: 1px solid rgba(108, 99, 255, 0.3);
}

.safety-card {
  background: linear-gradient(145deg, rgba(108, 99, 255, 0.08), rgba(10, 14, 23, 0.6));
  border-color: rgba(108, 99, 255, 0.2);
}

.safety-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.safety-card .safety-icon {
  font-size: 28px;
  color: var(--gold);
  margin-bottom: 12px;
}

/* ---------- 相关推荐 ---------- */
.related-section {
  padding: var(--spacing-section-sm) 0 0;
  background: var(--bg-body);
}

.section-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 48px;
}

.section-badge {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.4px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 100%;
  transition: var(--transition-base);
  position: relative;
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-light);
}

.related-card .card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.related-card .card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.related-card:hover .card-img-wrap img {
  transform: scale(1.06);
}

.related-card .card-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 23, 0) 40%, rgba(10, 14, 23, 0.75) 100%);
}

.related-card .card-body {
  padding: 24px;
  position: relative;
  z-index: 1;
}

.related-card .card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.5;
  transition: var(--transition-base);
}

.related-card:hover .card-body h3 {
  color: var(--accent);
}

.related-card .card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.related-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
  transition: var(--transition-base);
}

.related-card .card-link i {
  font-size: 12px;
  transition: transform 0.3s ease;
}

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

/* ---------- FAQ ---------- */
.faq-section {
  padding: var(--spacing-section) 0;
  background: var(--bg-soft);
  position: relative;
}

.faq-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.06;
  pointer-events: none;
}

.faq-section .container {
  position: relative;
  z-index: 1;
}

.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
}

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

.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.faq-item .faq-answer p {
  margin-bottom: 8px;
}

.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

/* ---------- CTA ---------- */
.cta-section {
  padding: var(--spacing-section) 0;
  background: var(--bg-body);
}

.cta-card {
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  position: relative;
  border-radius: 28px;
  padding: 64px 48px;
  overflow: hidden;
  text-align: center;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
}

.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(108, 99, 255, 0.45) 0%, rgba(10, 14, 23, 0.88) 70%);
}

.cta-card > * {
  position: relative;
  z-index: 1;
}

.cta-card h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.cta-card p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

/* ---------- 按钮 ---------- */
.btn-custom {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 32px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: var(--transition-base);
  cursor: pointer;
  text-decoration: none;
}

.btn-primary-custom {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 8px 26px rgba(108, 99, 255, 0.35);
}

.btn-primary-custom:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 34px rgba(108, 99, 255, 0.45);
  background: linear-gradient(135deg, #7a72ff, #34d6ee);
}

.btn-ghost-custom {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
}

.btn-ghost-custom:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.3);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer-brand .logo {
  margin-bottom: 18px;
  font-size: 22px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
  max-width: 300px;
}

.footer h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
}

.footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient-brand);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-links a::before {
  content: '\f105';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 12px;
  color: var(--text-muted);
  transition: var(--transition-base);
}

.footer-links a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

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

.footer-bottom {
  padding: 24px 0 28px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-bottom .sep {
  color: var(--border-light);
}

/* ---------- 内容未找到 ---------- */
.not-found {
  text-align: center;
  padding: 60px 30px;
}

.not-found i {
  font-size: 56px;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: inline-block;
}

.not-found h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.not-found p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .article-hero {
    padding: 80px 0 56px;
  }
  .article-hero h1 {
    font-size: 36px;
  }
  .article-card {
    padding: 36px 32px;
  }
  .cta-card {
    padding: 48px 32px;
  }
}

@media (max-width: 991.98px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: rgba(8, 12, 22, 0.97);
    -webkit-backdrop-filter: blur(30px);
    backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 96px 28px 40px;
    gap: 6px;
    transition: right 0.38s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1200;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
    border-left: 1px solid var(--border);
  }
  .nav-menu.open {
    right: 0;
  }
  .nav-menu > li {
    width: 100%;
  }
  .nav-menu > li > a {
    display: block;
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }
  .nav-toggle {
    z-index: 1400;
    position: relative;
  }
  .nav-toggle.active {
    color: var(--accent);
  }
  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 32px;
  }
  .sidebar-card:last-child {
    grid-column: 1 / -1;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --spacing-section: 64px;
  }
  .top-bar .container {
    flex-direction: column;
    gap: 4px;
  }
  .article-hero {
    padding: 60px 0 44px;
  }
  .article-hero h1 {
    font-size: 30px;
  }
  .article-card {
    padding: 26px 20px;
    border-radius: var(--radius-md);
  }
  .related-section .row {
    gap: 0;
  }
  .sidebar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .cta-card {
    border-radius: 20px;
    padding: 40px 24px;
  }
  .cta-card h2 {
    font-size: 26px;
  }
  .section-header h2 {
    font-size: 27px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }
  .main-nav .container {
    height: 60px;
  }
  .logo {
    font-size: 17px;
  }
  .article-hero h1 {
    font-size: 25px;
  }
  .article-meta {
    gap: 10px;
  }
  .meta-item {
    font-size: 12px;
    padding: 5px 12px;
  }
  .article-card {
    padding: 22px 16px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 22px;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .cta-card {
    padding: 36px 20px;
  }
  .cta-card h2 {
    font-size: 23px;
  }
  .btn-custom {
    padding: 12px 24px;
    font-size: 14px;
  }
}

/* ---------- 焦点可见性 ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.5);
  outline-offset: 3px;
  border-radius: 4px;
}

/* roulang page: category2 */
:root {
            --primary: #6366f1;
            --primary-rgb: 99, 102, 241;
            --primary-dark: #4f46e5;
            --accent: #e6b84c;
            --accent-rgb: 230, 184, 76;
            --bg: #0b0f19;
            --bg-2: #0e1424;
            --bg-3: #121a2e;
            --bg-card: #131c30;
            --bg-card-hover: #1a2440;
            --text: #e8edf5;
            --text-muted: #94a3b8;
            --border: rgba(148, 163, 184, 0.16);
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
            --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.25);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 导航栏 ===== */
        .main-nav {
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }

        .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 14px rgba(230, 184, 76, 0.7);
            flex-shrink: 0;
        }

        .logo:hover {
            color: #fff;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }

        .nav-menu a {
            display: inline-block;
            padding: 0.55rem 1.2rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            line-height: 1.4;
            transition: var(--transition);
        }

        .nav-menu a:hover {
            color: #fff;
            background: rgba(99, 102, 241, 0.12);
        }

        .nav-menu a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text);
            font-size: 1.2rem;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== Hero 区域 ===== */
        .page-hero {
            position: relative;
            padding: 6.5rem 0 5rem;
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.72) 0%, rgba(11, 15, 25, 0.88) 60%, var(--bg) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem;
            margin-bottom: 1.8rem;
        }

        .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.35rem 1.1rem;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 600;
            background: rgba(99, 102, 241, 0.12);
            border: 1px solid rgba(99, 102, 241, 0.28);
            color: #c7d2fe;
        }

        .hero-badges span::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(230, 184, 76, 0.8);
        }

        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 1.2rem;
        }

        .hero-desc {
            max-width: 640px;
            margin: 0 auto 2.4rem;
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        /* ===== 按钮组件 ===== */
        .btn-major,
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .btn-major {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
        }

        .btn-major:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(99, 102, 241, 0.5);
        }

        .btn-ghost {
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border);
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            background: rgba(230, 184, 76, 0.06);
        }

        .btn:focus-visible,
        .btn-major:focus-visible,
        .btn-ghost:focus-visible {
            outline: 3px solid rgba(99, 102, 241, 0.5);
            outline-offset: 2px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 5rem 0;
        }

        .section-alt {
            background: var(--bg-2);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 3.5rem;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 1.3rem;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            background: rgba(99, 102, 241, 0.1);
            border: 1px solid rgba(99, 102, 241, 0.25);
            color: #a5b4fc;
            margin-bottom: 1.1rem;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 0.8rem;
            letter-spacing: -0.01em;
        }

        .section-head p {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
        }

        /* ===== 帮助分类卡片 ===== */
        .help-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2.2rem 2rem;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .help-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .help-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(99, 102, 241, 0.35);
            transform: translateY(-6px);
            box-shadow: var(--shadow-sm);
        }

        .help-card:hover::before {
            opacity: 1;
        }

        .help-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            font-size: 1.4rem;
            color: #c7d2fe;
            background: rgba(99, 102, 241, 0.12);
            border: 1px solid rgba(99, 102, 241, 0.2);
            margin-bottom: 1.4rem;
            transition: var(--transition);
        }

        .help-card:hover .help-icon {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
            transform: scale(1.04);
        }

        .help-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.7rem;
        }

        .help-card p {
            font-size: 0.93rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.2rem;
        }

        .help-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.88rem;
            font-weight: 600;
            color: #a5b4fc;
        }

        .help-link i {
            font-size: 0.8rem;
            transition: transform 0.3s ease;
        }

        .help-link:hover {
            color: var(--accent);
        }

        .help-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 登录流程 ===== */
        .steps-section {
            background: var(--bg-2);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
        }

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2.4rem 1.8rem;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }

        .step-item:hover {
            border-color: rgba(99, 102, 241, 0.35);
            transform: translateY(-5px);
            box-shadow: var(--shadow-sm);
        }

        .step-number {
            width: 52px;
            height: 52px;
            margin: 0 auto 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
        }

        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -1.2rem;
            transform: translateY(-50%);
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.9rem;
            z-index: 2;
        }

        /* ===== 账户安全 ===== */
        .security-section {
            background: var(--bg);
        }

        .security-img-wrap {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .security-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .security-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11, 15, 25, 0.6) 100%);
        }

        .security-content {
            padding-left: 1.5rem;
        }

        .security-content .section-tag {
            margin-bottom: 1rem;
        }

        .security-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 0.9rem;
        }

        .security-content>p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
            margin-bottom: 1.8rem;
        }

        .security-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .security-item {
            display: flex;
            gap: 0.9rem;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 1rem 1.2rem;
            transition: var(--transition);
        }

        .security-item:hover {
            border-color: rgba(99, 102, 241, 0.3);
            background: var(--bg-card-hover);
        }

        .security-item i {
            font-size: 1.1rem;
            color: var(--accent);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .security-item strong {
            display: block;
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 0.15rem;
        }

        .security-item span {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-2);
            border-top: 1px solid var(--border);
        }

        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion {
            --bs-accordion-bg: var(--bg-card);
            --bs-accordion-color: var(--text);
            --bs-accordion-border-color: var(--border);
            --bs-accordion-border-radius: var(--radius-sm);
            --bs-accordion-inner-border-radius: var(--radius-sm);
            --bs-accordion-btn-color: var(--text);
            --bs-accordion-btn-bg: var(--bg-card);
            --bs-accordion-btn-icon: none;
            --bs-accordion-btn-active-icon: none;
            --bs-accordion-btn-focus-border-color: rgba(99, 102, 241, 0.4);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.15);
            --bs-accordion-active-bg: rgba(99, 102, 241, 0.08);
            --bs-accordion-active-color: #fff;
        }

        .accordion-item {
            border: 1px solid var(--border);
            margin-bottom: 1rem;
            border-radius: var(--radius-sm) !important;
            overflow: hidden;
            background: var(--bg-card);
            transition: var(--transition);
        }

        .accordion-item:hover {
            border-color: rgba(99, 102, 241, 0.3);
        }

        .accordion-button {
            font-size: 0.97rem;
            font-weight: 600;
            padding: 1.2rem 1.5rem;
            line-height: 1.5;
            box-shadow: none;
            border: none;
        }

        .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            background-image: none;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(99, 102, 241, 0.08);
            color: #fff;
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.15);
        }

        .accordion-body {
            padding: 1.2rem 1.5rem;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
            border-top: 1px solid var(--border);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 5rem 0;
            background: var(--bg);
        }

        .cta-box {
            position: relative;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(230, 184, 76, 0.08)), var(--bg-card);
            border: 1px solid rgba(99, 102, 241, 0.25);
            border-radius: 28px;
            padding: 3.5rem 3rem;
            text-align: center;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.1);
            filter: blur(80px);
            top: -120px;
            right: -80px;
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.9rem;
            position: relative;
        }

        .cta-box p {
            max-width: 560px;
            margin: 0 auto 2.2rem;
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
            position: relative;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.9rem;
            justify-content: center;
            position: relative;
        }

        .cta-contact {
            margin-top: 2rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            position: relative;
        }

        .cta-contact a {
            color: #a5b4fc;
            font-weight: 600;
        }

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

        /* ===== 页脚 ===== */
        .footer {
            background: #080b12;
            border-top: 1px solid var(--border);
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 320px;
            margin: 0;
        }

        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.1rem;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 1.5rem 0;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom .mx-2 {
            margin: 0 0.5rem;
            color: var(--border);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }

            .step-arrow {
                display: none;
            }

            .page-hero h1 {
                font-size: 2.4rem;
            }

            .section-head h2 {
                font-size: 2rem;
            }

            .security-content {
                padding-left: 0;
                margin-top: 2rem;
            }

            .footer-grid {
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                padding: 0.75rem 0;
            }

            .nav-menu {
                position: absolute;
                top: 100%;
                left: 1rem;
                right: 1rem;
                flex-direction: column;
                align-items: stretch;
                background: var(--bg-2);
                border: 1px solid var(--border);
                border-radius: var(--radius);
                padding: 0.8rem;
                display: none;
                box-shadow: var(--shadow);
            }

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

            .nav-menu a {
                padding: 0.8rem 1.2rem;
                border-radius: var(--radius-sm);
                text-align: center;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .page-hero {
                padding: 4.5rem 0 3.5rem;
            }

            .page-hero h1 {
                font-size: 2rem;
                line-height: 1.3;
            }

            .hero-desc {
                font-size: 0.98rem;
                padding: 0 1rem;
            }

            .section {
                padding: 3.5rem 0;
            }

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

            .step-item {
                padding: 1.8rem 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .cta-box {
                padding: 2.5rem 1.5rem;
            }

            .cta-box h2 {
                font-size: 1.6rem;
            }

            .security-img-wrap img {
                min-height: 220px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1.2rem;
                padding-right: 1.2rem;
            }

            .logo {
                font-size: 1.1rem;
                gap: 0.4rem;
            }

            .nav-menu a {
                font-size: 0.92rem;
            }

            .page-hero h1 {
                font-size: 1.6rem;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn-major,
            .btn-ghost {
                width: 100%;
                justify-content: center;
                padding: 0.75rem 1.5rem;
            }

            .help-card {
                padding: 1.6rem 1.3rem;
            }

            .help-card h3 {
                font-size: 1.05rem;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-bottom .mx-2 {
                display: none;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }