/* roulang page: index */
/* ============ Design Tokens ============ */
:root {
  --bg-primary: #0B111D;
  --bg-surface: #111A2B;
  --bg-card: rgba(255,255,255,0.04);
  --bg-glass: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.10);
  --line-light: rgba(255,255,255,0.08);
  --primary: #2667FF;
  --accent: #23D5E6;
  --purple: #6C5CE7;
  --gold: #E5B25D;
  --text-main: #EAF0F8;
  --text-sub: #9AA8BB;
  --text-dim: #5F6E82;
  --success: #3DD68C;
  --error: #FF5A76;
  --warning: #FFB648;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-glass: 22px;
  --shadow-card: 0 8px 24px rgba(0,0,0,0.25);
  --shadow-hover: 0 12px 32px rgba(38,103,255,0.18);
  --shadow-btn: 0 0 0 1px #2667FF, 0 0 24px rgba(38,103,255,0.45);
  --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --spacing-section: 88px;
  --spacing-section-mobile: 56px;
  --container-width: 1280px;
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent); }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

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

::selection { background: rgba(35,213,230,0.3); color: #fff; }

/* ============ Header / Nav ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 16px;
  background: rgba(11,17,29,0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: background .25s ease;
}
.site-header.scrolled .header-top {
  background: rgba(11,17,29,0.92);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 8px;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 0 12px rgba(38,103,255,0.4);
}
.brand-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: .3px;
}
.brand-name .brand-accent { color: var(--accent); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-search {
  width: 220px;
  position: relative;
}
.header-search input {
  width: 100%;
  height: 38px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 38px 0 16px;
  font-size: 13px;
  color: var(--text-main);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.header-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(35,213,230,0.2);
}
.header-search input::placeholder { color: var(--text-dim); }
.header-search .search-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-sub);
  font-size: 14px;
  pointer-events: none;
}
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 20px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition: background .18s, box-shadow .18s, transform .16s;
}
.btn-cta:hover {
  background: #1e54d6;
  color: #fff;
  box-shadow: 0 0 20px rgba(38,103,255,0.45);
}
.btn-cta:active { transform: scale(.96); }

.header-search-mobile-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-sub);
  font-size: 20px;
  padding: 6px;
}

.header-nav {
  height: 48px;
  background: rgba(17,26,43,0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.header-nav::-webkit-scrollbar { display: none; }
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 16px;
  white-space: nowrap;
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
}
.nav-tab {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  border: 1px solid transparent;
  transition: background .18s, color .18s, border-color .18s;
}
.nav-tab:hover {
  background: rgba(255,255,255,0.07);
  color: var(--text-main);
}
.nav-tab.active {
  background: rgba(38,103,255,0.18);
  border-color: rgba(38,103,255,0.6);
  color: #fff;
  box-shadow: 0 0 12px rgba(38,103,255,0.2);
}
.nav-tab:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ============ Mobile Search Expand ============ */
.mobile-search-panel {
  display: none;
  background: var(--bg-surface);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.mobile-search-panel.open { display: block; }
.mobile-search-panel input {
  width: 100%;
  height: 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  color: var(--text-main);
  font-size: 14px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 160px 0 88px;
  background:
    linear-gradient(to bottom right, rgba(11,17,29,0.85) 0%, rgba(17,26,43,0.5) 60%, rgba(11,17,29,0.85) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.15);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}
.hero-content {
  max-width: 600px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(35,213,230,0.12);
  border: 1px solid rgba(35,213,230,0.35);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 46px;
  line-height: 1.25;
  font-weight: 800;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .2px;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 480px;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  transition: background .18s, box-shadow .18s, transform .16s;
}
.btn-primary:hover {
  background: #1e54d6;
  box-shadow: var(--shadow-btn);
  transform: translateY(-2px);
}
.btn-primary:active { transform: scale(.97); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  background: rgba(255,255,255,0.06);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: background .18s, border-color .18s, transform .16s;
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* Hero Glass Card */
.hero-glass {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 24px;
  padding: 28px 26px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}
.hero-glass h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #fff;
}
.hero-glass .glass-sub {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 20px;
}
.form-group {
  margin-bottom: 14px;
}
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-group input {
  width: 100%;
  height: 44px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(35,213,230,0.2);
}
.form-group input::placeholder { color: var(--text-dim); }
.form-submit {
  width: 100%;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s, box-shadow .18s, transform .16s;
  margin-top: 4px;
}
.form-submit:hover {
  background: #1e54d6;
  box-shadow: 0 0 20px rgba(38,103,255,0.4);
}
.form-submit:active { transform: scale(.98); }
.form-tip {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.5;
}

/* ============ Section General ============ */
.section {
  padding: var(--spacing-section) 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 20px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.section-head .section-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin-top: 6px;
}
.section-more {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: color .18s;
}
.section-more:hover { color: var(--accent); }

/* ============ Hot Grid 2+4 ============ */
.hot-grid .section-head { margin-bottom: 40px; }
.grid-2plus4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 24px;
}
.card-large {
  grid-column: span 2;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card-standard {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card-large:hover, .card-standard:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(35,213,230,0.4);
}
.card-large .card-img { height: 260px; overflow: hidden; position: relative; }
.card-standard .card-img { height: 160px; overflow: hidden; position: relative; }
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s;
}
.card-large:hover .card-img img, .card-standard:hover .card-img img { transform: scale(1.04); }
.card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,17,29,0.55) 0%, transparent 60%);
}
.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(11,17,29,0.75);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(35,213,230,0.3);
}
.card-body {
  padding: 22px;
}
.card-large .card-body { padding: 28px; }
.card-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-standard .card-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  transition: color .18s, gap .18s;
}
.card-link:hover { color: var(--accent); gap: 10px; }

/* ============ News / CMS ============ */
.news-section {
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(17,26,43,0.5) 100%);
}
.news-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.news-feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
}
.news-feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.news-feature .news-img {
  height: 280px;
  overflow: hidden;
  position: relative;
}
.news-feature .news-img img { width: 100%; height: 100%; object-fit: cover; }
.news-feature .news-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11,17,29,0.6) 0%, transparent 70%);
}
.news-feature-body { padding: 24px 28px; }
.news-feature-body h3 { font-size: 20px; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }
.news-feature-body h3 a { color: #fff; }
.news-feature-body h3 a:hover { color: var(--accent); }
.news-feature-body p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-dim);
}
.news-meta .news-cat {
  color: var(--accent);
  font-weight: 600;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: background .2s, border-color .2s, transform .2s;
}
.news-item:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(35,213,230,0.3);
  transform: translateX(4px);
}
.news-thumb {
  width: 72px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item-body { flex: 1; min-width: 0; }
.news-item-body h4 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-item-body h4 a { color: var(--text-main); }
.news-item-body h4 a:hover { color: var(--accent); }
.news-item-body p {
  font-size: 13px;
  color: var(--text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}
.news-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
}
.news-empty {
  grid-column: 1 / -1;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  background: rgba(255,255,255,0.02);
}
.news-empty .empty-icon {
  font-size: 44px;
  margin-bottom: 14px;
  opacity: .5;
}
.news-empty p { color: var(--text-sub); font-size: 14px; margin-bottom: 18px; }
.news-empty .btn-refresh {
  height: 38px;
  padding: 0 24px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 500;
  transition: all .18s;
}
.news-empty .btn-refresh:hover { border-color: var(--accent); color: var(--accent); }

/* ============ Testimonials ============ */
.testimonials {
  background: rgba(17,26,43,0.3);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}
.t-slider {
  position: relative;
  overflow: hidden;
  margin: 0 -8px;
}
.t-track {
  display: flex;
  gap: 20px;
  transition: transform .45s cubic-bezier(.4,0,.2,1);
  padding: 8px;
}
.t-card {
  flex: 0 0 calc(33.333% - 14px);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color .2s;
}
.t-card:hover { border-color: rgba(35,213,230,0.3); }
.t-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 15px;
}
.t-text {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.t-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
.t-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}
.t-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}
.t-source {
  font-size: 12px;
  color: var(--text-dim);
}
.t-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}
.t-arrow {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .18s;
}
.t-arrow:hover { border-color: var(--accent); color: var(--accent); background: rgba(35,213,230,0.1); }
.t-dots {
  display: flex;
  gap: 6px;
}
.t-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  border: none;
  padding: 0;
  transition: width .3s, background .3s;
}
.t-dot.active {
  width: 20px;
  background: var(--accent);
}

/* ============ Guarantee Bar ============ */
.guarantee { border-top: 1px solid var(--line-light); }
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.g-item {
  padding: 36px 24px;
  text-align: center;
  position: relative;
  transition: background .2s;
}
.g-item:hover { background: rgba(255,255,255,0.03); }
.g-item + .g-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 44px;
  width: 1px;
  background: var(--line-light);
}
.g-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 14px;
  background: rgba(38,103,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
}
.g-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}
.g-item p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.5;
}

/* ============ FAQ ============ */
.faq-section { border-top: 1px solid var(--line-light); }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .2s;
}
.faq-item.open { border-color: rgba(38,103,255,0.5); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color .18s;
}
.faq-q:hover { color: var(--accent); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--text-sub);
  transition: transform .25s, color .2s, border-color .2s;
  margin-left: 16px;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--accent);
  border-color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-a {
  max-height: 400px;
  padding-bottom: 24px;
}
.faq-a p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  border-left: 2px solid var(--primary);
  padding-left: 16px;
}

/* ============ Bottom CTA ============ */
.cta-section {
  position: relative;
  padding: 88px 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(38,103,255,0.18) 0%, transparent 65%),
    radial-gradient(ellipse at 80% 30%, rgba(35,213,230,0.1) 0%, transparent 50%),
    var(--bg-surface);
  border-radius: 0;
  overflow: hidden;
}
.cta-container {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 24px;
  padding: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  position: relative;
  z-index: 2;
}
.cta-title {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.cta-desc {
  font-size: 15px;
  color: var(--text-sub);
}
.btn-cta-large {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 54px;
  padding: 0 38px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
  transition: all .2s;
}
.btn-cta-large:hover {
  background: #1e54d6;
  box-shadow: var(--shadow-btn);
  transform: translateY(-2px);
}
.btn-cta-large:active { transform: scale(.97); }

/* ============ Footer ============ */
.site-footer {
  background: #070B14;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.9fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .brand-name {
  font-size: 20px;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 360px;
}
.footer-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-sub);
  transition: color .18s;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
}
.footer-contact li { display: flex; align-items: center; gap: 10px; }
.footer-bottom {
  border-top: 1px solid var(--line-light);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 10px;
}

/* ============ Responsive ============ */
@media (max-width: 1199px) {
  .hero h1 { font-size: 40px; }
  .grid-2plus4 { grid-template-columns: repeat(3, 1fr); }
  .card-large { grid-column: span 3; }
  .card-standard { grid-column: span 1; }
}

@media (max-width: 991px) {
  .hero { padding: 140px 0 64px; }
  .hero .container { grid-template-columns: 1fr; gap: 36px; }
  .hero-content { max-width: 100%; }
  .grid-2plus4 { grid-template-columns: repeat(2, 1fr); }
  .card-large { grid-column: span 2; }
  .news-layout { grid-template-columns: 1fr; gap: 32px; }
  .t-card { flex: 0 0 calc(50% - 10px); }
  .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
  .g-item + .g-item::before { display: none; }
  .g-item:nth-child(3)::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 767px) {
  :root { --spacing-section: var(--spacing-section-mobile); }
  .container { padding: 0 16px; }
  .header-search { display: none; }
  .header-search-mobile-btn { display: block; }
  .header-actions .btn-cta { height: 36px; padding: 0 16px; font-size: 13px; }
  .hero { padding: 130px 0 56px; }
  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn-primary,
  .hero-btns .btn-ghost { width: 100%; }
  .hero-glass { padding: 24px 20px; }
  .section { padding: var(--spacing-section) 0; }
  .section-head h2 { font-size: 26px; }
  .grid-2plus4 { grid-template-columns: 1fr; gap: 18px; }
  .card-large { grid-column: span 1; }
  .card-large .card-img { height: 220px; }
  .card-standard .card-img { height: 180px; }
  .card-large .card-body { padding: 20px; }
  .card-standard .card-body { padding: 18px; }
  .news-feature .news-img { height: 220px; }
  .news-item { padding: 14px; }
  .news-thumb { width: 60px; height: 60px; }
  .t-card { flex: 0 0 100%; }
  .guarantee-grid { grid-template-columns: 1fr 1fr; }
  .g-item { padding: 24px 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-container { flex-direction: column; align-items: flex-start; padding: 32px 24px; text-align: left; }
  .btn-cta-large { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .t-nav { margin-top: 24px; }
}

@media (max-width: 520px) {
  .news-item { flex-direction: row; }
  .brand-name { font-size: 16px; }
  .brand-logo { width: 32px; height: 32px; font-size: 15px; }
  .nav-tab { padding: 6px 14px; font-size: 13px; }
  .header-top { padding: 0 10px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ============ Keyframes ============ */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 1px rgba(38,103,255,0.4), 0 0 20px rgba(38,103,255,0.2); }
  50% { box-shadow: 0 0 0 1px rgba(38,103,255,0.7), 0 0 36px rgba(38,103,255,0.45); }
}

.btn-primary, .btn-cta-large {
  animation: pulse-glow 3s ease-in-out infinite;
}

.hero-badge {
  animation: fadeSlideDown .6s ease both;
}
.hero h1 {
  animation: fadeSlideUp .6s .1s ease both;
}
.hero-sub {
  animation: fadeSlideUp .6s .2s ease both;
}
.hero-btns {
  animation: fadeSlideUp .6s .3s ease both;
}
.hero-glass {
  animation: fadeSlideUp .6s .25s ease both;
}
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* roulang page: article */
:root {
  --bg-primary:#0B111D;
  --bg-surface:#111A2B;
  --bg-glass:rgba(255,255,255,.06);
  --border-color:rgba(255,255,255,.10);
  --primary:#2667FF;
  --accent:#23D5E6;
  --violet:#6C5CE7;
  --text-primary:#EAF0F8;
  --text-secondary:#9AA8BB;
  --text-muted:#5F6E82;
  --success:#3DD68C;
  --warning:#FFB648;
  --error:#FF5A76;
  --radius-btn:10px;
  --radius-card:14px;
  --radius-large:20px;
  --radius-glass:22px;
  --shadow-card:0 8px 24px rgba(0,0,0,.25);
  --shadow-hover:0 12px 32px rgba(38,103,255,.18);
  --transition:160ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg-primary);color:var(--text-primary);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
img{max-width:100%;display:block}
button,input,textarea{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000}
.header-top{height:64px;display:flex;align-items:center;justify-content:space-between;background:rgba(11,17,29,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06);padding:0 24px;transition:background .3s ease}
.site-header.scrolled .header-top{background:rgba(11,17,29,.94)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;color:#fff;box-shadow:0 0 20px rgba(35,213,230,.35)}
.brand-name{font-size:18px;font-weight:800;letter-spacing:-.3px;white-space:nowrap}
.header-tools{display:flex;align-items:center;gap:12px}
.header-search{position:relative;width:220px}
.header-search input{width:100%;height:38px;border-radius:var(--radius-btn);border:1px solid var(--border-color);background:rgba(255,255,255,.05);padding:0 38px 0 14px;color:var(--text-primary);font-size:13px;outline:none;transition:border-color var(--transition),box-shadow var(--transition)}
.header-search input::placeholder{color:var(--text-muted)}
.header-search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(35,213,230,.15)}
.header-search svg{position:absolute;right:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-muted);pointer-events:none}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-btn);font-weight:600;font-size:14px;padding:10px 20px;border:none;cursor:pointer;transition:all var(--transition);white-space:nowrap;gap:6px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 0 0 1px var(--primary),0 0 24px rgba(38,103,255,.35)}
.btn-primary:hover{background:#3477FF;box-shadow:0 0 0 1px var(--primary),0 0 32px rgba(38,103,255,.55);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:focus{outline:2px solid var(--accent);outline-offset:2px}
.btn-ghost{background:rgba(255,255,255,.07);color:var(--text-primary);border:1px solid var(--border-color)}
.btn-ghost:hover{background:rgba(255,255,255,.13);border-color:var(--accent);color:var(--accent)}
.btn-ghost:focus{outline:2px solid var(--accent);outline-offset:2px}
.btn-sm{padding:8px 14px;font-size:13px}
.header-nav{height:48px;background:rgba(8,13,22,.88);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.05);display:flex;align-items:center;overflow-x:auto;scrollbar-width:none}
.header-nav::-webkit-scrollbar{display:none}
.nav-tabs{display:flex;align-items:center;gap:6px;padding:6px 24px;margin:0 auto;max-width:1240px;width:100%}
.nav-tab{display:inline-flex;align-items:center;padding:8px 16px;border-radius:999px;font-size:13px;font-weight:500;color:var(--text-secondary);border:1px solid transparent;transition:all var(--transition);white-space:nowrap}
.nav-tab:hover{color:var(--text-primary);background:rgba(255,255,255,.07);border-color:var(--border-color)}
.nav-tab.active{background:rgba(38,103,255,.18);color:var(--accent);border-color:rgba(35,213,230,.4);box-shadow:0 0 16px rgba(35,213,230,.1)}
.nav-tab:focus{outline:2px solid var(--accent);outline-offset:-2px}
.mobile-search-toggle{display:none;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px}

/* Breadcrumb */
.breadcrumb-wrap{background:linear-gradient(to bottom,rgba(11,17,29,.95),rgba(11,17,29,.6));padding:130px 24px 0}
.breadcrumb{max-width:1240px;margin:0 auto;display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-muted);padding-bottom:20px}
.breadcrumb a{color:var(--text-muted);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-muted);opacity:.5}
.breadcrumb .current{color:var(--text-secondary);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Article Hero */
.article-hero{position:relative;padding:44px 24px 56px;background:linear-gradient(135deg,rgba(11,17,29,.9),rgba(17,26,43,.72)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;border-bottom:1px solid rgba(255,255,255,.06)}
.article-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(to bottom,rgba(11,17,29,.2),rgba(11,17,29,.85));pointer-events:none}
.article-hero-inner{position:relative;z-index:1;max-width:840px;margin:0 auto;text-align:left}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:18px;font-size:13px;color:var(--text-secondary)}
.article-meta .badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(35,213,230,.12);color:var(--accent);border:1px solid rgba(35,213,230,.25)}
.article-meta time{display:inline-flex;align-items:center;gap:5px}
.article-meta .author{display:inline-flex;align-items:center;gap:5px}
.article-hero h1{font-size:38px;font-weight:800;line-height:1.3;letter-spacing:-.5px;margin-bottom:16px;color:var(--text-primary)}
.article-summary{font-size:15px;line-height:1.9;color:var(--text-secondary);max-width:720px;margin-bottom:20px;padding-left:14px;border-left:3px solid var(--accent)}

/* Article Body */
.article-body-section{padding:56px 24px 72px}
.article-body{max-width:780px;margin:0 auto;font-size:16.5px;line-height:1.85;color:var(--text-primary)}
.article-body h2{font-size:26px;font-weight:700;line-height:1.4;margin:48px 0 20px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.08);letter-spacing:-.3px}
.article-body h3{font-size:20px;font-weight:600;line-height:1.5;margin:36px 0 16px;color:var(--text-primary)}
.article-body h2:first-child{margin-top:0}
.article-body p{margin-bottom:20px}
.article-body p strong{color:var(--accent);font-weight:600}
.article-body ul{margin:0 0 24px;padding:0;list-style:none}
.article-body ol{margin:0 0 24px;padding-left:24px;list-style:decimal}
.article-body ul li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--text-secondary)}
.article-body ul li::before{content:'';position:absolute;left:4px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px rgba(35,213,230,.5)}
.article-body ol li{margin-bottom:10px;color:var(--text-secondary);padding-left:4px}
.article-body blockquote{margin:28px 0;padding:20px 24px;background:rgba(38,103,255,.08);border-left:4px solid var(--primary);border-radius:0 var(--radius-card) var(--radius-card) 0;color:var(--text-secondary);font-size:15.5px;line-height:1.8}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:14.5px;border-radius:var(--radius-card);overflow:hidden}
.article-body table th,.article-body table td{padding:12px 16px;border:1px solid rgba(255,255,255,.1);text-align:left}
.article-body table th{background:rgba(38,103,255,.14);color:var(--text-primary);font-weight:600;font-size:14px}
.article-body table td{color:var(--text-secondary)}
.article-body table tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.article-body img{border-radius:12px;border:1px solid var(--border-color);margin:28px 0;box-shadow:var(--shadow-card)}
.article-body figcaption{font-size:13px;color:var(--text-muted);text-align:center;margin-top:-20px;margin-bottom:24px}
.article-body code{background:rgba(255,255,255,.08);padding:2px 8px;border-radius:6px;font-family:ui-monospace,Consolas,Menlo,monospace;font-size:14px;color:var(--accent)}
.article-body pre{background:#0A0F18;border:1px solid var(--border-color);border-radius:12px;padding:20px 24px;overflow-x:auto;margin:28px 0;line-height:1.6}
.article-body pre code{background:none;padding:0;color:#D6E2F0;font-size:14px}

/* Article Tags & Nav */
.article-footer{max-width:780px;margin:0 auto;padding-top:32px;border-top:1px solid rgba(255,255,255,.08)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.tag{display:inline-flex;align-items:center;padding:5px 14px;border-radius:999px;font-size:12.5px;color:var(--text-secondary);background:rgba(255,255,255,.05);border:1px solid var(--border-color);transition:all var(--transition)}
.tag:hover{color:var(--accent);border-color:var(--accent)}
.post-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.post-nav-link{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-btn);border:1px solid var(--border-color);background:rgba(255,255,255,.03);color:var(--text-secondary);font-size:13.5px;font-weight:500;transition:all var(--transition)}
.post-nav-link:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}

/* Section Heading */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:36px;gap:20px}
.section-head h2{font-size:28px;font-weight:700;letter-spacing:-.4px;line-height:1.3}
.section-head .sub{font-size:14px;color:var(--text-secondary);margin-top:6px}
.more-link{font-size:13.5px;color:var(--text-secondary);display:inline-flex;align-items:center;gap:6px;padding:8px 0;transition:color var(--transition)}
.more-link:hover{color:var(--accent)}
.more-link svg{width:16px;height:16px;transition:transform var(--transition)}
.more-link:hover svg{transform:translateX(4px)}

/* Related Cards */
.related-section{background:var(--bg-surface);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{background:rgba(255,255,255,.03);border:1px solid var(--border-color);border-radius:var(--radius-large);overflow:hidden;transition:all var(--transition)}
.related-card:hover{transform:translateY(-6px);border-color:rgba(35,213,230,.35);box-shadow:var(--shadow-hover)}
.related-card .related-cover{height:170px;position:relative;overflow:hidden}
.related-card .related-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.related-card:hover .related-cover img{transform:scale(1.05)}
.related-card .related-body{padding:20px}
.related-card .related-body h3{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .related-body h3 a:hover{color:var(--accent)}
.related-card .related-body .related-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px}
.related-card .related-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-muted)}

/* CTA */
.cta-section{position:relative;padding:72px 24px;background:radial-gradient(ellipse at center,rgba(38,103,255,.14),transparent 65%),var(--bg-primary);border-top:1px solid rgba(255,255,255,.05)}
.cta-inner{max-width:960px;margin:0 auto;text-align:center;position:relative;z-index:1}
.cta-inner h2{font-size:28px;font-weight:700;margin-bottom:12px;letter-spacing:-.3px}
.cta-inner p{font-size:15px;color:var(--text-secondary);margin-bottom:28px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Not Found */
.not-found{max-width:640px;margin:40px auto;text-align:center;padding:48px 32px;background:rgba(255,255,255,.03);border:1px dashed var(--border-color);border-radius:var(--radius-large)}
.not-found-icon{width:64px;height:64px;border-radius:50%;background:rgba(255,90,118,.12);display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.not-found h2{font-size:22px;margin-bottom:12px}
.not-found p{font-size:14px;color:var(--text-secondary);margin-bottom:24px}

/* Footer */
.site-footer{background:#080E18;border-top:1px solid rgba(255,255,255,.06);padding:64px 24px 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;max-width:1240px;margin:0 auto;padding-bottom:48px}
.footer-brand .brand-name{font-size:18px;font-weight:800;display:inline-flex;align-items:center;margin-bottom:16px}
.footer-brand p{font-size:13.5px;line-height:1.75;color:var(--text-muted);max-width:320px}
.footer-col-title{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:20px;letter-spacing:.3px}
.footer-links li,.footer-contact li{margin-bottom:10px}
.footer-links a,.footer-contact{font-size:13.5px;color:var(--text-secondary);transition:color var(--transition)}
.footer-links a:hover{color:var(--accent)}
.footer-contact li{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:13px}
.footer-contact svg{color:var(--text-muted);flex-shrink:0}
.footer-bottom{max-width:1240px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:20px 0 24px;border-top:1px solid rgba(255,255,255,.04);font-size:12.5px;color:var(--text-muted)}

/* Responsive */
@media(max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .header-search{width:140px}
  .article-hero h1{font-size:32px}
}
@media(max-width:767px){
  .container{padding:0 16px}
  .header-top{padding:0 16px}
  .header-search{display:none}
  .mobile-search-toggle{display:block}
  .header-search.mobile-open{display:block;position:absolute;top:64px;left:16px;right:16px;z-index:20}
  .nav-tabs{padding:6px 16px}
  .section{padding:56px 0}
  .breadcrumb-wrap{padding:120px 16px 0}
  .article-hero{padding:36px 16px 44px}
  .article-hero h1{font-size:26px}
  .article-summary{font-size:14px}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .article-body table{font-size:13px;display:block;overflow-x:auto}
  .article-footer .post-nav{flex-direction:column;align-items:stretch}
  .post-nav-link{justify-content:center}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:36px;padding-bottom:36px}
  .footer-bottom{flex-direction:column}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2{font-size:24px}
  .cta-section{padding:48px 16px}
  .cta-inner h2{font-size:22px}
}
@media(max-width:520px){
  .related-grid{grid-template-columns:1fr}
  .brand-name{font-size:16px}
  .btn{padding:8px 14px;font-size:13px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .article-meta{font-size:12px}
}

/* roulang page: category1 */
:root {
      --bg: #0B111D;
      --bg-surface: #111A2B;
      --bg-deep: #070C15;
      --glass: rgba(255, 255, 255, 0.06);
      --glass-blur: rgba(255, 255, 255, 0.05);
      --border: rgba(255, 255, 255, 0.10);
      --border-light: rgba(255, 255, 255, 0.06);
      --primary: #2667FF;
      --accent: #23D5E6;
      --violet: #6C5CE7;
      --text: #EAF0F8;
      --text-secondary: #9AA8BB;
      --text-muted: #5F6E82;
      --success: #3DD68C;
      --warning: #FFB648;
      --error: #FF5A76;
      --gold: #E5B25D;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-glass: 24px;
      --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
      --shadow-hover: 0 12px 32px rgba(38, 103, 255, 0.18);
      --shadow-btn-glow: 0 0 0 1px #2667FF, 0 0 24px rgba(38, 103, 255, 0.45);
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 130px;
    }

    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color .18s ease;
    }

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

    input {
      font-family: inherit;
      outline: none;
    }

    ul,
    ol {
      list-style: none;
    }

    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 17, 29, 0.72);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      transition: background .3s ease, box-shadow .3s ease;
    }

    .site-header.scrolled {
      background: rgba(7, 12, 21, 0.92);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    }

    .header-top {
      height: 64px;
      display: flex;
      align-items: center;
    }

    .header-top-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      flex-shrink: 0;
    }

    .brand-logo {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), var(--violet));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      letter-spacing: -0.5px;
      color: #fff;
      margin-right: 10px;
      box-shadow: 0 4px 14px rgba(38, 103, 255, 0.3);
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.3px;
      white-space: nowrap;
    }

    .brand-name .accent {
      color: var(--accent);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .header-search {
      display: flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border-light);
      border-radius: 999px;
      padding: 6px 14px;
      width: 220px;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    .header-search:focus-within {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(35, 213, 230, 0.15);
    }

    .header-search svg {
      flex-shrink: 0;
      margin-right: 8px;
      color: var(--text-muted);
    }

    .header-search input {
      background: transparent;
      border: none;
      outline: none;
      color: var(--text);
      font-size: 14px;
      width: 100%;
    }

    .header-search input::placeholder {
      color: var(--text-muted);
    }

    .header-search input::-ms-clear {
      display: none;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      padding: 10px 24px;
      font-weight: 600;
      font-size: 14px;
      line-height: 1.4;
      transition: all .18s ease;
      white-space: nowrap;
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 0 0 1px var(--primary), 0 4px 16px rgba(38, 103, 255, 0.3);
    }

    .btn-primary:hover {
      background: #3a78ff;
      box-shadow: 0 0 0 1px #3a78ff, 0 6px 20px rgba(38, 103, 255, 0.45);
      transform: translateY(-2px);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 0 0 1px var(--primary), 0 2px 10px rgba(38, 103, 255, 0.3);
    }

    .btn-outline {
      background: transparent;
      color: var(--accent);
      border-color: var(--accent);
    }

    .btn-outline:hover {
      background: rgba(35, 213, 230, 0.1);
      border-color: var(--accent);
    }

    .btn-outline:active {
      background: rgba(35, 213, 230, 0.2);
    }

    .btn-lg {
      padding: 14px 36px;
      font-size: 16px;
      border-radius: 12px;
    }

    .btn-glow {
      box-shadow: var(--shadow-btn-glow);
    }

    .btn-glow:hover {
      box-shadow: 0 0 0 1px #2667FF, 0 0 32px rgba(38, 103, 255, 0.6);
    }

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

    .header-nav {
      height: 48px;
      border-top: 1px solid var(--border-light);
      background: rgba(7, 12, 21, 0.7);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
    }

    .nav-tabs {
      display: flex;
      align-items: center;
      gap: 8px;
      height: 100%;
      overflow-x: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
      padding-left: 2px;
      padding-right: 2px;
    }

    .nav-tabs::-webkit-scrollbar {
      display: none;
    }

    .nav-tab {
      display: inline-flex;
      align-items: center;
      padding: 6px 18px;
      border-radius: 999px;
      border: 1px solid var(--border-light);
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      white-space: nowrap;
      transition: all .18s ease;
      flex-shrink: 0;
    }

    .nav-tab:hover {
      background: rgba(255, 255, 255, 0.08);
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .nav-tab.active {
      background: rgba(38, 103, 255, 0.2);
      color: var(--accent);
      border-color: rgba(35, 213, 230, 0.4);
      box-shadow: 0 0 12px rgba(35, 213, 230, 0.12);
      font-weight: 600;
    }

    .nav-tab:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    /* ===== HERO ===== */
    .page-hero {
      position: relative;
      min-height: 360px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 180px 0 60px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(130deg, rgba(11, 17, 29, 0.9) 0%, rgba(17, 26, 43, 0.72) 55%, rgba(11, 17, 29, 0.6) 100%);
      z-index: 1;
    }

    .page-hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(11, 17, 29, 0.25);
      z-index: 1;
    }

    .page-hero .container {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 760px;
    }

    .page-hero-inner {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .page-hero h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .page-hero h1 .highlight {
      color: var(--accent);
    }

    .page-hero p {
      font-size: 17px;
      color: var(--text-secondary);
      max-width: 560px;
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(35, 213, 230, 0.12);
      border: 1px solid rgba(35, 213, 230, 0.3);
      border-radius: 999px;
      padding: 5px 14px;
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 20px;
      font-weight: 500;
    }

    .hero-badge svg {
      width: 14px;
      height: 14px;
    }

    /* ===== SECTION COMMON ===== */
    .section {
      padding: 88px 0;
      position: relative;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.6px;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(35, 213, 230, 0.08);
      border: 1px solid rgba(35, 213, 230, 0.2);
      border-radius: 999px;
      padding: 4px 14px;
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 700;
      letter-spacing: -0.4px;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 640px;
      line-height: 1.7;
    }

    .text-center {
      text-align: center;
    }

    .text-center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }

    .divider {
      width: 100%;
      height: 1px;
      background: var(--border-light);
      margin: 20px 0;
      border: none;
    }

    /* ===== PREPARE SECTION ===== */
    .prepare-section {
      background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 100%);
    }

    .prepare-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .prepare-split .section-title {
      margin-bottom: 10px;
    }

    .prepare-list {
      margin: 28px 0 0;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .prepare-list li {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      font-size: 15px;
      line-height: 1.6;
      color: var(--text-secondary);
    }

    .prepare-list li .check-icon {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: rgba(61, 214, 140, 0.15);
      color: var(--success);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .prepare-list li strong {
      color: var(--text);
      font-weight: 600;
    }

    .prepare-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
    }

    .prepare-visual img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }

    .prepare-visual .visual-tag {
      position: absolute;
      bottom: 16px;
      left: 16px;
      background: rgba(11, 17, 29, 0.85);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 8px 14px;
      font-size: 13px;
      color: var(--text);
    }

    /* ===== STEPS SECTION ===== */
    .steps-section {
      background: var(--bg);
    }

    .steps-header {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      margin-bottom: 48px;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      transition: all .2s ease;
      position: relative;
    }

    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(35, 213, 230, 0.3);
    }

    .step-num {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      background: rgba(35, 213, 230, 0.1);
      border: 1px solid rgba(35, 213, 230, 0.25);
      border-radius: 999px;
      width: 34px;
      height: 34px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text);
    }

    .step-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== SAFETY SECTION ===== */
    .safety-section {
      background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 100%);
    }

    .safety-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }

    .safety-card-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .safety-item {
      display: flex;
      gap: 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 18px 20px;
      transition: border-color .2s ease, transform .18s ease;
    }

    .safety-item:hover {
      border-color: rgba(35, 213, 230, 0.3);
      transform: translateX(4px);
    }

    .safety-item .safety-icon {
      flex-shrink: 0;
      width: 38px;
      height: 38px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .safety-item .safety-icon.warn {
      background: rgba(255, 182, 72, 0.12);
      color: var(--warning);
      border: 1px solid rgba(255, 182, 72, 0.25);
    }

    .safety-item .safety-icon.ok {
      background: rgba(61, 214, 140, 0.12);
      color: var(--success);
      border: 1px solid rgba(61, 214, 140, 0.25);
    }

    .safety-item h4 {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .safety-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .safety-visual {
      position: sticky;
      top: 140px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-card);
    }

    .safety-visual img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    .safety-visual .safety-overlay {
      padding: 20px;
      background: rgba(11, 17, 29, 0.8);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
    }

    .safety-overlay .badge-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: rgba(61, 214, 140, 0.15);
      color: var(--success);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .safety-overlay span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text);
    }

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

    .faq-header {
      margin-bottom: 40px;
    }

    .faq-list {
      max-width: 760px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color .2s ease;
    }

    .faq-item.open {
      border-color: rgba(35, 213, 230, 0.3);
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 22px;
      text-align: left;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      transition: color .18s ease;
      gap: 16px;
    }

    .faq-question:hover {
      color: var(--accent);
    }

    .faq-question:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: -2px;
    }

    .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform .25s ease, color .2s ease, border-color .2s ease;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
      border-color: var(--accent);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .3s ease;
    }

    .faq-answer-inner {
      padding: 0 22px 20px 22px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-secondary);
      border-left: 2px solid transparent;
    }

    .faq-item.open .faq-answer-inner {
      border-left-color: var(--primary);
    }

    /* ===== CTA SECTION ===== */
    .cta-section {
      padding: 88px 0;
    }

    .cta-panel {
      background: radial-gradient(ellipse at 30% 40%, rgba(38, 103, 255, 0.2) 0%, rgba(11, 17, 29, 0.8) 55%, rgba(17, 26, 43, 0.9) 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      position: relative;
      overflow: hidden;
      text-align: center;
      box-shadow: var(--shadow-card);
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      top: -60px;
      right: -60px;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(108, 92, 231, 0.12);
      filter: blur(60px);
      z-index: 0;
    }

    .cta-panel::after {
      content: '';
      position: absolute;
      bottom: -80px;
      left: 20%;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: rgba(35, 213, 230, 0.08);
      filter: blur(70px);
      z-index: 0;
    }

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

    .cta-panel h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .cta-panel p {
      font-size: 15px;
      color: var(--text-secondary);
      margin-bottom: 28px;
      max-width: 520px;
      margin-left: auto;
      margin-right: auto;
    }

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

    /* ===== FOOTER ===== */
    .site-footer {
      background: var(--bg-deep);
      border-top: 1px solid var(--border-light);
      padding-top: 64px;
      padding-bottom: 28px;
    }

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

    .footer-brand .brand-logo {
      width: 28px;
      height: 28px;
      border-radius: 8px;
      font-size: 12px;
      margin-right: 6px;
    }

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

    .footer-brand p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-top: 14px;
      max-width: 340px;
    }

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

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 14px;
      color: var(--text-secondary);
      transition: color .18s ease, padding-left .18s ease;
    }

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

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

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 14px;
      color: var(--text-secondary);
    }

    .footer-contact li svg {
      flex-shrink: 0;
      margin-top: 3px;
      color: var(--text-muted);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 1024px) {
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }

      .prepare-split {
        gap: 36px;
      }

      .safety-wrap {
        gap: 32px;
      }

      .footer-grid {
        gap: 28px;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .header-search {
        display: none;
        position: absolute;
        top: 64px;
        left: 16px;
        right: 16px;
        width: auto;
        background: var(--bg-surface);
        border-color: var(--border);
        z-index: 100;
      }

      .header-search.open {
        display: flex;
      }

      .search-toggle-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border-light);
        color: var(--text-secondary);
      }

      .header-top-inner .btn-sm {
        padding: 8px 16px;
        font-size: 13px;
      }

      .page-hero {
        padding: 150px 0 48px;
        min-height: 320px;
      }

      .page-hero h1 {
        font-size: 30px;
      }

      .page-hero p {
        font-size: 15px;
      }

      .section {
        padding: 56px 0;
      }

      .section-title {
        font-size: 24px;
      }

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

      .prepare-visual img {
        height: 240px;
      }

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

      .safety-visual {
        position: static;
      }

      .safety-visual img {
        height: 220px;
      }

      .steps-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }

      .cta-panel {
        padding: 40px 24px;
      }

      .cta-panel h2 {
        font-size: 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: left;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
      }
    }

    @media (max-width: 520px) {
      .brand-name {
        font-size: 17px;
      }

      .brand-logo {
        width: 30px;
        height: 30px;
        font-size: 12px;
      }

      .header-top-inner .btn-sm {
        padding: 6px 12px;
        font-size: 12px;
      }

      .hero-actions {
        flex-direction: column;
        width: 100%;
      }

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

      .prepare-list li {
        font-size: 14px;
      }

      .cta-actions {
        flex-direction: column;
        width: 100%;
      }

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

      .faq-question {
        padding: 16px;
        font-size: 14px;
      }
    }

    @media (max-width: 768px) {
      .search-toggle-btn {
        display: inline-flex;
      }
    }

    @media (min-width: 769px) {
      .search-toggle-btn {
        display: none;
      }
    }

    /* ===== ANIMATIONS ===== */
    @keyframes pulse-glow {
      0%, 100% {
        box-shadow: 0 0 0 1px rgba(35, 213, 230, 0.3), 0 0 12px rgba(35, 213, 230, 0.2);
      }
      50% {
        box-shadow: 0 0 0 1px rgba(35, 213, 230, 0.6), 0 0 24px rgba(35, 213, 230, 0.4);
      }
    }

    .sticky-nav-dismiss {
      top: 0 !important;
    }