/* roulang page: index */
:root {
  --primary: #1e5eff;
  --primary-deep: #0943c4;
  --navy: #0d2a66;
  --neon-cyan: #22d3ee;
  --neon-bright: #38e8ff;
  --navy-deep: #0b1220;
  --navy-light: #111c33;
  --ink: #0f1e3d;
  --body: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --soft-bg: #f7f9fc;
  --blue-soft: #eef6ff;
  --card-shadow: 0 2px 8px rgba(15, 35, 80, 0.06);
  --card-shadow-hover: 0 16px 40px -12px rgba(20, 50, 120, 0.18);
  --cta-shadow: 0 8px 20px -6px rgba(30, 94, 255, 0.45);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--body);
  background: #ffffff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img {
  display: block;
  max-width: 100%;
}
a {
  text-decoration: none;
  color: inherit;
}
ul,
ol {
  list-style: none;
}
button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.container-site {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 32px);
  padding-right: clamp(20px, 4vw, 32px);
}
.section-space {
  padding: 80px 0;
}
@media (max-width: 768px) {
  .section-space {
    padding: 52px 0;
  }
}
.header-gradient {
  background: linear-gradient(90deg, #0b1220 0%, #111c33 55%, #0d1830 100%);
  position: relative;
  box-shadow: 0 10px 24px -20px rgba(10, 25, 60, 0.3);
}
.header-gradient::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, #1e5eff, #22d3ee, transparent);
  pointer-events: none;
}
.brand-text {
  color: #ffffff;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
  line-height: 1.3;
}
.brand-text .brand-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #22d3ee;
  margin-left: 6px;
  box-shadow: 0 0 12px rgba(56, 232, 255, 0.85);
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 4px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.2s, text-shadow 0.2s;
}
.nav-link:hover {
  color: #ffffff;
}
.nav-link.active {
  color: #38e8ff;
  text-shadow: 0 0 10px rgba(56, 232, 255, 0.55), 0 0 22px rgba(56, 232, 255, 0.22);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #1e5eff, #22d3ee);
  box-shadow: 0 0 8px rgba(56, 232, 255, 0.7);
}
.nav-divider {
  height: 1px;
  margin: 10px 0;
  background: linear-gradient(90deg, transparent, rgba(56, 232, 255, 0.18), transparent);
}
.nav-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 10px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(56, 232, 255, 0.55);
  color: #ffffff;
  background: rgba(11, 18, 32, 0.25);
  box-shadow: 0 0 10px rgba(56, 232, 255, 0.08), inset 0 0 14px rgba(56, 232, 255, 0.04);
  transition: all 0.2s ease;
}
.nav-action-btn:hover {
  transform: translateY(-2px);
  border-color: #38e8ff;
  background: rgba(56, 232, 255, 0.12);
  box-shadow: 0 0 18px rgba(56, 232, 255, 0.3);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 13px 30px;
  border-radius: 10px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 15px;
  box-shadow: var(--cta-shadow);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--primary-deep);
  box-shadow: 0 14px 30px -8px rgba(30, 94, 255, 0.55);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 13px 30px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid #c6d6f4;
  color: #0d2a66;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s ease;
}
.btn-secondary:hover {
  background: #eef6ff;
  border-color: #1e5eff;
  transform: translateY(-2px);
}
.btn-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 26px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid #c6d6f4;
  color: #0d2a66;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease;
}
.btn-light:hover {
  border-color: #1e5eff;
  background: #eef6ff;
}
.hero-bg {
  position: relative;
  background:
    linear-gradient(100deg, rgba(255, 255, 255, 0.98) 6%, rgba(255, 255, 255, 0.9) 40%, rgba(238, 245, 255, 0.78) 76%, rgba(255, 255, 255, 0.88) 100%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.stat-divider {
  width: 1px;
  height: 48px;
  background: #e4eaf3;
}
.step-card {
  border: 1px solid #e4eaf3;
  background: #ffffff;
  border-radius: 16px;
  padding: 30px 28px;
  transition: all 0.3s ease;
  box-shadow: var(--card-shadow);
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: #bdd3ff;
}
.recommend-card {
  border: 1px solid #cbdfff;
  background: #ffffff;
  box-shadow: 0 18px 44px -20px rgba(30, 94, 255, 0.28);
}
.faq-item {
  background: #ffffff;
  border: 1px solid #e4eaf3;
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.faq-item.open {
  border-color: #1e5eff;
  box-shadow: 0 8px 24px -16px rgba(30, 94, 255, 0.3);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 400px;
}
.news-card {
  background: #ffffff;
  border: 1px solid #e9eef5;
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--card-shadow);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: #c9dbff;
}
.news-card:hover .news-thumb {
  transform: scale(1.03);
}
.news-thumb {
  transition: transform 0.4s ease;
}
.news-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid #edf2f8;
  transition: padding 0.2s;
}
.news-list-item:hover {
  padding-left: 8px;
}
.news-list-item:hover .circle-arrow {
  background: #1e5eff;
  color: #fff;
  border-color: #1e5eff;
}
.circle-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex: none;
  border: 1px solid #ccd9f2;
  color: #1e5eff;
  background: #fff;
  transition: all 0.2s;
}
.form-card {
  background: #ffffff;
  border: 1px solid #e4eaf3;
  border-radius: 18px;
  padding: clamp(24px, 4vw, 40px);
  box-shadow: var(--card-shadow-hover);
}
.form-input {
  width: 100%;
  min-height: 48px;
  border: 1px solid #dae1ee;
  background: #fbfdff;
  border-radius: 10px;
  padding: 12px 16px;
  color: #0f1e3d;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus {
  border-color: #1e5eff;
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.12);
}
.footer-bg {
  background: #0b1220;
  color: rgba(255, 255, 255, 0.68);
}
.footer-link-item {
  display: inline-block;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 0;
  font-size: 14px;
  transition: color 0.2s;
}
.footer-link-item:hover {
  color: #38e8ff;
}
.menu-mobile {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.menu-mobile.open {
  max-height: 520px;
}
.table-compare {
  min-width: 680px;
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
}
.table-compare th,
.table-compare td {
  padding: 16px 18px;
  border-bottom: 1px solid #edf2f8;
  text-align: left;
  font-size: 14px;
}
.table-compare th {
  background: #f8fafd;
  color: #0f1e3d;
  font-weight: 700;
}
.table-compare .col-mark {
  background: #0d2a66;
  color: #22d3ee;
}
.table-compare tbody tr:hover {
  background: #eef7ff;
}
.numeric-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(30, 94, 255, 0.08);
  color: #1e5eff;
  font-weight: 700;
  font-size: 20px;
}
.empty-state {
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed #bdd3ff;
  border-radius: 16px;
  background: rgba(238, 246, 255, 0.6);
  color: #7e91b0;
  font-size: 15px;
}

/* roulang page: article */
:root {
            --brand: #1e5eff;
            --navy: #0d2a66;
            --ink: #1e293b;
            --muted: #475569;
            --soft: #94a3b8;
            --border: #e2e8f0;
            --line-blue: #bdd3ff;
            --bg-alt: #f4f7fb;
            --shadow-card: 0 2px 8px rgba(15, 35, 80, 0.06);
            --shadow-card-hover: 0 16px 40px -12px rgba(20, 50, 120, 0.18);
            --shadow-cta: 0 8px 20px -6px rgba(30, 94, 255, 0.45);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--ink);
            background: #fff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea,
        select {
            font: inherit;
        }

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

        @media (max-width: 640px) {
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        .header-bg {
            background: linear-gradient(135deg, #0b1220 0%, #111c33 100%);
            position: relative;
        }

        .header-bg::after {
            content: "";
            display: block;
            height: 1.5px;
            background: linear-gradient(90deg, transparent, #1e5eff 20%, #38e8ff 50%, #8b7bff 80%, transparent);
        }

        .brand-text {
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.01em;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            line-height: 1.3;
            white-space: nowrap;
        }

        .brand-dot {
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: #38e8ff;
            box-shadow: 0 0 6px rgba(56, 232, 255, 0.8), 0 0 16px rgba(56, 232, 255, 0.35);
            display: inline-block;
        }

        .nav-link {
            position: relative;
            color: #cbd5e1;
            font-size: 15px;
            font-weight: 500;
            padding: 22px 4px;
            display: inline-flex;
            align-items: center;
            transition: color 0.2s ease;
            white-space: nowrap;
            min-height: 44px;
        }

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

        .nav-link.active {
            color: #38e8ff;
            text-shadow: 0 0 10px rgba(56, 232, 255, 0.45), 0 0 18px rgba(56, 232, 255, 0.15);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 4px;
            right: 4px;
            bottom: -2px;
            height: 2px;
            border-radius: 999px;
            background: linear-gradient(90deg, #1e5eff, #38e8ff);
            box-shadow: 0 0 8px rgba(56, 232, 255, 0.65), 0 0 20px rgba(56, 232, 255, 0.2);
        }

        .btn-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            min-height: 44px;
            padding: 10px 24px;
            border-radius: 10px;
            background: linear-gradient(135deg, #0d2a66, #143a86);
            border: 1px solid rgba(56, 232, 255, 0.55);
            box-shadow: 0 0 12px rgba(30, 94, 255, 0.22), 0 0 0 1px rgba(56, 232, 255, 0.06) inset;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .btn-neon:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(56, 232, 255, 0.35), 0 0 34px rgba(56, 232, 255, 0.12);
            background: linear-gradient(135deg, #123a78, #164a9e);
        }

        .btn-neon-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            min-height: 44px;
            padding: 10px 24px;
            border-radius: 10px;
            color: #e2e8f0;
            border: 1px solid rgba(148, 163, 184, 0.55);
            background: transparent;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-neon-outline:hover {
            border-color: #38e8ff;
            color: #38e8ff;
            box-shadow: 0 0 12px rgba(56, 232, 255, 0.12);
            transform: translateY(-2px);
        }

        .mobile-panel {
            background: linear-gradient(180deg, #0b1220, #101a2e);
            border-bottom-left-radius: 16px;
            border-bottom-right-radius: 16px;
            padding: 14px 20px 24px;
            box-shadow: 0 22px 40px -18px rgba(0, 0, 0, 0.5);
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            color: #cbd5e1;
            font-size: 16px;
            font-weight: 500;
            border-bottom: 1px solid rgba(56, 232, 255, 0.12);
            transition: color 0.2s ease;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: #38e8ff;
        }

        .menu-toggle {
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid rgba(148, 163, 184, 0.3);
            color: #e2e8f0;
            background: transparent;
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .menu-toggle:hover {
            border-color: #38e8ff;
            color: #38e8ff;
        }

        .footer-bg {
            background: linear-gradient(180deg, #0b1220, #0f1930);
            color: #cbd5e1;
            border-top: 1px solid rgba(30, 94, 255, 0.15);
        }

        .footer-link-item {
            font-size: 14px;
            color: #94a3b8;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
            position: relative;
        }

        .footer-link-item:hover {
            color: #38e8ff;
        }

        .article-hero {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 76px 0 64px;
        }

        .article-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(238, 246, 255, 0.96) 0%, rgba(255, 255, 255, 0.92) 45%, rgba(244, 247, 251, 0.88) 100%);
        }

        .breadcrumb-nav {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 28px;
        }

        .breadcrumb-nav a {
            color: var(--brand);
            transition: opacity 0.2s ease;
        }

        .breadcrumb-nav a:hover {
            opacity: 0.75;
        }

        .breadcrumb-nav .sep {
            color: #cbd5e1;
        }

        .breadcrumb-nav .current {
            color: #64748b;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-post-title {
            position: relative;
            z-index: 2;
            font-size: clamp(28px, 4vw, 40px);
            line-height: 1.28;
            font-weight: 800;
            color: var(--navy);
            letter-spacing: -0.01em;
            margin-bottom: 20px;
        }

        .article-meta {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 18px;
            font-size: 14px;
            color: #64748b;
        }

        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(189, 211, 255, 0.7);
            border-radius: 999px;
            padding: 5px 14px;
            color: #334155;
        }

        .meta-chip svg {
            color: var(--brand);
            flex: none;
        }

        .article-body-wrap {
            padding: 64px 0 48px;
        }

        .article-container {
            max-width: 860px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .article-container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: #2d3748;
        }

        .article-content p {
            margin: 1.2em 0;
        }

        .article-content h2 {
            font-size: 26px;
            line-height: 1.45;
            color: var(--navy);
            font-weight: 700;
            margin-top: 52px;
            margin-bottom: 16px;
            padding-left: 14px;
            border-left: 4px solid var(--brand);
        }

        .article-content h3 {
            font-size: 21px;
            line-height: 1.5;
            color: var(--navy);
            font-weight: 650;
            margin-top: 36px;
            margin-bottom: 12px;
        }

        .article-content h4 {
            font-size: 18px;
            line-height: 1.6;
            color: var(--navy);
            font-weight: 650;
            margin-top: 26px;
            margin-bottom: 10px;
        }

        .article-content ul {
            margin: 1.2em 0;
            padding-left: 4px;
            list-style: none;
        }

        .article-content ul li {
            position: relative;
            padding-left: 22px;
            margin: 0.55em 0;
        }

        .article-content ul li::before {
            content: "";
            position: absolute;
            left: 2px;
            top: 0.72em;
            width: 6px;
            height: 6px;
            border-radius: 2px;
            background: var(--brand);
            transform: rotate(45deg);
        }

        .article-content ol {
            margin: 1.2em 0;
            padding-left: 24px;
            list-style: none;
            counter-reset: article-ol;
        }

        .article-content ol li {
            position: relative;
            padding-left: 16px;
            margin: 0.55em 0;
            counter-increment: article-ol;
        }

        .article-content ol li::before {
            content: counter(article-ol, decimal-leading-zero) ".";
            position: absolute;
            left: -10px;
            top: 0;
            color: var(--brand);
            font-weight: 700;
            font-size: 14px;
        }

        .article-content a {
            color: var(--brand);
            border-bottom: 1px solid rgba(30, 94, 255, 0.35);
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .article-content a:hover {
            color: #0943c4;
            border-bottom-color: #0943c4;
        }

        .article-content blockquote {
            border-left: 4px solid var(--brand);
            background: #f4f8ff;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            color: #334155;
            margin: 24px 0;
            font-size: 16px;
        }

        .article-content img {
            max-width: 760px;
            width: 100%;
            border-radius: 16px;
            margin: 28px auto;
            box-shadow: var(--shadow-card);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
            overflow-x: auto;
            display: block;
            white-space: nowrap;
            border: 1px solid var(--border);
            border-radius: 12px;
        }

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

        .article-content table th {
            background: #f4f8ff;
            color: var(--navy);
            font-weight: 600;
        }

        .article-content code {
            background: #eef4ff;
            color: #0943c4;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.92em;
        }

        .article-content pre {
            background: #0b1220;
            color: #e2e8f0;
            border-radius: 16px;
            padding: 22px;
            overflow-x: auto;
            line-height: 1.7;
            margin: 24px 0;
            border-left: 4px solid #38e8ff;
        }

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

        .article-tag-label {
            display: inline-flex;
            align-items: center;
            background: #f4f8ff;
            border: 1px solid rgba(189, 211, 255, 0.7);
            color: #334155;
            font-size: 13px;
            border-radius: 999px;
            padding: 6px 16px;
            transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }

        .article-tag-label:hover {
            border-color: var(--brand);
            color: var(--brand);
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            min-height: 44px;
            padding: 10px 26px;
            border-radius: 10px;
            background: transparent;
            border: 1px solid var(--line-blue);
            color: #334155;
            transition: all 0.2s ease;
        }

        .btn-outline:hover {
            background: var(--brand);
            border-color: var(--brand);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-cta);
        }

        .empty-state-box {
            padding: 52px 32px;
            border: 2px dashed rgba(189, 211, 255, 0.85);
            border-radius: 20px;
            background: rgba(244, 248, 255, 0.45);
            text-align: center;
            min-height: 220px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 14px;
        }

        :focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
            border-radius: 4px;
        }

        @media (hover: hover) {
            .nav-link,
            .footer-link-item,
            .btn-neon,
            .btn-neon-outline,
            .btn-outline {
                transition: all 0.2s ease;
            }
        }

        @media (max-width: 640px) {
            .article-body-wrap {
                padding: 40px 0 32px;
            }
            .article-hero {
                padding: 48px 0 44px;
            }
            .article-meta .meta-chip {
                font-size: 13px;
                padding: 3px 10px;
            }
        }

/* roulang page: category1 */
:root {
      --brand: #1e5eff;
      --brand-deep: #0d2a66;
      --brand-hover: #0943c4;
      --accent: #22d3ee;
      --neon: #38e8ff;
      --nav-bg-1: #0b1220;
      --nav-bg-2: #111c33;
      --text-title: #0d2a66;
      --text-body: #1e293b;
      --text-muted: #475569;
      --text-weak: #7c8db0;
      --bg-soft: #f4f7fb;
      --bg-blue: #eef3ff;
      --border-light: #e2e8f0;
      --border-blue: #bcd3ff;
      --shadow-card: 0 2px 8px rgba(15, 35, 80, 0.06);
      --shadow-card-hover: 0 16px 40px -12px rgba(20, 50, 120, 0.18);
      --shadow-cta: 0 8px 20px -6px rgba(30, 94, 255, 0.45);
      --radius-card: 16px;
      --radius-btn: 10px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      color: var(--text-body);
      background: #ffffff;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input,
    textarea {
      font: inherit;
      border: none;
      background: none;
    }

    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 3px;
      border-radius: 4px;
    }

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

    .site-header {
      position: relative;
      z-index: 60;
      background: linear-gradient(180deg, var(--nav-bg-1), var(--nav-bg-2));
      box-shadow: 0 8px 30px rgba(2, 8, 25, 0.28);
    }

    .header-glow-line {
      position: absolute;
      left: 0;
      right: 0;
      bottom: -1px;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--brand), var(--neon), transparent);
      opacity: 0.9;
      pointer-events: none;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      min-height: 76px;
      position: relative;
    }

    .brand-text {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 0.01em;
      white-space: nowrap;
    }

    .brand-dot {
      width: 10px;
      height: 10px;
      border-radius: 999px;
      background: var(--neon);
      box-shadow: 0 0 8px rgba(56, 232, 255, 0.8), 0 0 18px rgba(56, 232, 255, 0.35);
      display: inline-block;
    }

    .nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      font-size: 15px;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.78);
      line-height: 76px;
      transition: color 0.25s ease;
    }

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

    .nav-link.active {
      color: #ffffff;
      text-shadow: 0 0 7px rgba(56, 232, 255, 0.6), 0 0 18px rgba(56, 232, 255, 0.2);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -1px;
      height: 2px;
      background: var(--neon);
      border-radius: 99px;
      box-shadow: 0 0 10px rgba(56, 232, 255, 0.7), 0 0 22px rgba(56, 232, 255, 0.3);
    }

    .btn-primary,
    .btn-secondary,
    .btn-nav-primary,
    .btn-nav-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      line-height: 1;
      padding: 14px 28px;
      transition: all 0.2s ease;
      cursor: pointer;
      min-height: 44px;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--brand);
      color: #fff;
      box-shadow: var(--shadow-cta);
    }

    .btn-primary:hover {
      background: var(--brand-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 26px -6px rgba(30, 94, 255, 0.55);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid var(--border-blue);
      color: var(--brand);
    }

    .btn-secondary:hover {
      border-color: var(--brand);
      background: var(--bg-blue);
      transform: translateY(-2px);
    }

    .btn-nav-primary {
      background: linear-gradient(180deg, rgba(56, 232, 255, 0.16), rgba(30, 94, 255, 0.2));
      border: 1px solid rgba(56, 232, 255, 0.55);
      color: #fff;
      padding: 12px 24px;
      box-shadow: 0 0 6px rgba(56, 232, 255, 0.16);
      letter-spacing: 0.02em;
    }

    .btn-nav-primary:hover {
      border-color: var(--neon);
      box-shadow: 0 0 16px rgba(56, 232, 255, 0.55), 0 0 32px rgba(56, 232, 255, 0.16);
      transform: translateY(-1px);
    }

    .btn-nav-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.28);
      color: rgba(255, 255, 255, 0.9);
      padding: 12px 24px;
    }

    .btn-nav-ghost:hover {
      border-color: rgba(255, 255, 255, 0.75);
      background: rgba(255, 255, 255, 0.08);
    }

    .hamburger {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.18);
      color: #fff;
      cursor: pointer;
    }

    .mobile-nav {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: #0d1626;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .mobile-nav.open {
      max-height: 420px;
    }

    .mobile-nav a {
      display: flex;
      align-items: center;
      min-height: 48px;
      padding: 0 20px;
      color: rgba(255, 255, 255, 0.82);
      font-size: 15px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .mobile-nav a:hover,
    .mobile-nav a.active {
      color: #fff;
      background: rgba(56, 232, 255, 0.06);
      box-shadow: inset 3px 0 0 var(--neon);
    }

    .hero-section {
      position: relative;
      overflow: hidden;
      background-color: #f4f8ff;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url("/assets/images/backpic/back-1.png");
      background-size: cover;
      background-position: center;
    }

    .hero-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(250, 252, 255, 0.96) 0%, rgba(240, 246, 255, 0.92) 42%, rgba(255, 255, 255, 0.68) 100%);
    }

    .hero-layout {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
      gap: 64px;
      align-items: center;
      padding: 80px 0 88px;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--brand);
      background: #e9f1fe;
      border-radius: 999px;
      padding: 7px 16px;
      letter-spacing: 0.03em;
      margin-bottom: 24px;
    }

    .hero-section h1 {
      color: var(--text-title);
      line-height: 1.14;
      letter-spacing: -0.015em;
      font-weight: 800;
    }

    .hero-lead {
      color: #52709a;
      font-size: 17px;
      line-height: 1.8;
      max-width: 560px;
      margin-top: 22px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 36px;
    }

    .hero-service-card {
      background: rgba(255, 255, 255, 0.94);
      border: 1px solid rgba(219, 232, 255, 0.92);
      border-radius: 22px;
      box-shadow: 0 18px 50px -16px rgba(20, 55, 130, 0.2);
      padding: 28px 26px;
    }

    .service-card-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #edf1f8;
      padding-bottom: 18px;
      margin-bottom: 18px;
    }

    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: #10b981;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.14);
      margin-right: 8px;
    }

    .service-list {
      display: grid;
      gap: 12px;
    }

    .service-line {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .service-icon {
      width: 24px;
      height: 24px;
      flex: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 7px;
      background: #edf4ff;
      color: var(--brand);
    }

    .hero-bottom-link {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--brand);
      font-weight: 600;
      font-size: 14px;
      margin-top: 20px;
      padding-top: 16px;
      border-top: 1px solid #edf1f8;
      transition: gap 0.2s;
    }

    .hero-bottom-link:hover {
      gap: 10px;
    }

    .scroll-hint {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding-bottom: 32px;
      color: #7b8caa;
      font-size: 13px;
      gap: 4px;
    }

    .steps-band {
      background: #f7faff;
      border-bottom: 1px solid #e8eefb;
    }

    .steps-meta {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 40px;
    }

    .title-flag {
      display: inline-block;
      width: 10px;
      height: 26px;
      border-radius: 6px;
      background: var(--brand);
      box-shadow: 0 4px 12px rgba(30, 94, 255, 0.2);
      margin-right: 12px;
    }

    .section-title {
      font-size: 30px;
      line-height: 1.3;
      font-weight: 800;
      color: var(--text-title);
    }

    .section-sub {
      color: var(--text-muted);
      font-size: 15px;
      margin-top: 6px;
    }

    .steps-track {
      display: flex;
      align-items: stretch;
      gap: 0;
    }

    .step-item {
      position: relative;
      flex: 1 1 0;
      padding: 18px 4px 22px 0;
    }

    .step-node {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .step-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 46px;
      height: 46px;
      border-radius: 999px;
      border: 1px solid #cfe0ff;
      background: #ffffff;
      color: var(--brand);
      flex: none;
    }

    .step-name {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-title);
    }

    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-top: 14px;
      max-width: 240px;
      padding-left: 58px;
    }

    .step-arrow {
      flex: none;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      color: var(--accent);
      transform: translateY(16px);
      opacity: 0.9;
    }

    .detail-section {
      background: #ffffff;
    }

    .detail-block {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
      gap: 52px;
      align-items: center;
      padding: 30px 0 64px;
    }

    .detail-block.reverse .detail-media {
      order: 2;
    }

    .detail-media {
      border-radius: 20px;
      overflow: hidden;
      background: #edf3fc;
      box-shadow: 0 18px 44px -18px rgba(20, 55, 120, 0.25);
      min-height: 280px;
      position: relative;
    }

    .detail-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      position: absolute;
      inset: 0;
    }

    .detail-step {
      display: inline-flex;
      align-items: center;
      font-size: 13px;
      font-weight: 600;
      color: #2b6de8;
      background: #e8f1ff;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 16px;
    }

    .detail-block h3 {
      font-size: 25px;
      font-weight: 800;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .detail-block p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
    }

    .detail-points {
      display: grid;
      gap: 10px;
      margin-top: 22px;
    }

    .detail-point {
      display: flex;
      align-items: center;
      gap: 8px;
      color: #36506c;
      font-size: 14px;
      font-weight: 500;
    }

    .detail-point svg {
      color: var(--brand);
      flex: none;
    }

    .checklist-section {
      background: linear-gradient(180deg, #f6f9ff 0%, #edf4ff 100%);
      border-top: 1px solid #e7edfd;
    }

    .checklist-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0 48px;
    }

    .checklist-cell {
      border-top: 2px solid #bed3ff;
      padding-top: 26px;
      position: relative;
    }

    .checklist-num {
      font-size: 14px;
      font-weight: 700;
      color: var(--brand);
      display: block;
      letter-spacing: 0.08em;
    }

    .checklist-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-title);
      margin: 8px 0;
    }

    .checklist-text {
      font-size: 14px;
      color: #586a85;
      line-height: 1.75;
    }

    .faq-band {
      background: #ffffff;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
      gap: 48px;
    }

    .faq-title-col {
      position: sticky;
      top: 104px;
      align-self: start;
    }

    .faq-list {
      display: grid;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #e4eaf3;
      border-radius: 14px;
      overflow: hidden;
      transition: border-color 0.2s, box-shadow 0.25s;
    }

    .faq-item.open {
      border-color: var(--brand);
      box-shadow: var(--shadow-card-hover);
    }

    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      text-align: left;
      cursor: pointer;
      padding: 17px 20px;
      color: #1b314f;
      font-size: 15px;
      font-weight: 600;
      gap: 16px;
      min-height: 44px;
    }

    .faq-toggle {
      width: 28px;
      height: 28px;
      flex: none;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid #d4dffa;
      color: var(--brand);
      transition: transform 0.3s;
    }

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

    .faq-answer-wrap {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 0.35s ease;
    }

    .faq-item.open .faq-answer-wrap {
      grid-template-rows: 1fr;
    }

    .faq-answer-inner {
      overflow: hidden;
    }

    .faq-answer-inner p {
      padding: 0 20px 18px;
      border-top: 1px dashed #e3eaf5;
      padding-top: 14px;
      color: #53627d;
      font-size: 14px;
      line-height: 1.85;
    }

    .cta-band {
      background: #eaf2ff;
    }

    .cta-panel {
      max-width: 1080px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: 24px;
      border: 1px solid #dae5f8;
      box-shadow: 0 18px 50px -20px rgba(25, 70, 150, 0.25);
      padding: 40px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }

    .footer-bg {
      background: linear-gradient(180deg, #0b1322 0%, #0d1729 100%);
      color: rgba(255, 255, 255, 0.88);
    }

    .footer-link-item {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
      transition: color 0.2s, padding-left 0.2s;
      display: inline-block;
      line-height: 1.6;
    }

    .footer-link-item:hover {
      color: var(--neon);
      text-shadow: 0 0 8px rgba(56, 232, 255, 0.35);
    }

    @media (max-width: 1023px) {
      .hero-layout {
        grid-template-columns: 1fr;
        gap: 36px;
        padding: 60px 0 64px;
      }
      .hero-section h1 {
        font-size: 44px !important;
      }
      .steps-track {
        flex-wrap: wrap;
        gap: 24px;
      }
      .step-item {
        flex: 1 1 44%;
      }
      .step-arrow {
        display: none;
      }
      .detail-block,
      .detail-block.reverse {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .detail-block.reverse .detail-media {
        order: 0;
      }
      .detail-media {
        min-height: 250px;
      }
      .detail-media img {
        position: static;
        height: auto;
      }
      .checklist-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .faq-layout {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .faq-title-col {
        position: static;
      }
    }

    @media (max-width: 767px) {
      .container-site {
        padding: 0 20px;
      }
      .header-inner {
        min-height: 68px;
      }
      .hero-layout {
        padding: 44px 0 48px;
      }
      .hero-section h1 {
        font-size: 34px !important;
      }
      .hero-title-desktop-br {
        display: none;
      }
      .steps-track {
        flex-direction: column;
      }
      .step-item {
        flex: none;
        width: 100%;
      }
      .step-desc {
        padding-left: 0;
        max-width: 100%;
      }
      .detail-block p {
        font-size: 14px;
      }
      .section-title {
        font-size: 25px;
      }
      .cta-panel {
        flex-direction: column;
        padding: 32px 24px;
        text-align: center;
      }
      .steps-meta {
        flex-direction: column;
        align-items: flex-start;
      }
      .cta-panel .btn-primary {
        width: 100%;
      }
    }

    @media (max-width: 520px) {
      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }
      .hero-actions .btn-primary,
      .hero-actions .btn-secondary,
      .hero-actions a {
        width: 100%;
      }
      .faq-q {
        font-size: 14px;
        padding: 16px;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #1e5eff;
      --primary-dark: #0d2a66;
      --primary-deep: #0f1e3d;
      --neon: #22d3ee;
      --neon-bright: #38e8ff;
      --bg-soft: #f4f7fb;
      --bg-mist: #eef6ff;
      --text-main: #1e293b;
      --text-muted: #475569;
      --text-faint: #94a3b8;
      --border: #e2e8f0;
      --border-brand: #bdd3ff;
      --shadow-card: 0 2px 8px rgba(15, 35, 80, 0.06);
      --shadow-card-hover: 0 16px 40px -12px rgba(20, 50, 120, 0.16);
      --shadow-cta: 0 8px 20px -6px rgba(30, 94, 255, 0.35);
      --radius-card: 20px;
      --radius-btn: 10px;
      --container-pad: 24px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: #ffffff;
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    .container-site {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    @media (min-width: 640px) {
      .container-site {
        padding-left: 32px;
        padding-right: 32px;
      }
    }

    @media (min-width: 1024px) {
      .container-site {
        padding-left: 24px;
        padding-right: 24px;
      }
    }

    .section-space {
      padding-top: 80px;
      padding-bottom: 80px;
    }

    @media (max-width: 767px) {
      .section-space {
        padding-top: 52px;
        padding-bottom: 52px;
      }
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: linear-gradient(135deg, #0b1220 0%, #111c33 100%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      box-shadow: 0 6px 24px rgba(2, 8, 28, 0.28);
    }

    .site-header::after {
      content: "";
      height: 1.5px;
      display: block;
      background: linear-gradient(90deg, transparent 0%, rgba(30, 94, 255, 0.9) 30%, rgba(34, 211, 238, 0.9) 70%, transparent 100%);
    }

    .header-inner {
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand-text {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 0.3px;
      white-space: nowrap;
    }

    .brand-dot {
      width: 6px;
      height: 6px;
      border-radius: 999px;
      background: var(--neon);
      box-shadow: 0 0 8px rgba(56, 232, 255, 0.9);
      display: inline-block;
    }

    .nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 0 2px;
      font-size: 15px;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.76);
      transition: color 0.2s ease;
      white-space: nowrap;
    }

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

    .nav-link.active {
      color: #a5f3fc;
      text-shadow: 0 0 6px rgba(56, 232, 255, 0.55), 0 0 18px rgba(56, 232, 255, 0.18);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 2px;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--neon-bright), rgba(34, 211, 238, 0.2));
      box-shadow: 0 0 8px rgba(56, 232, 255, 0.7);
    }

    .btn-header-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 22px;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: rgba(34, 211, 238, 0.08);
      border: 1px solid rgba(56, 232, 255, 0.55);
      box-shadow: inset 0 0 12px rgba(56, 232, 255, 0.08), 0 0 8px rgba(56, 232, 255, 0.05);
      transition: all 0.2s ease;
    }

    .btn-header-primary:hover {
      transform: translateY(-2px);
      border-color: rgba(56, 232, 255, 0.95);
      box-shadow: 0 0 16px rgba(56, 232, 255, 0.35), inset 0 0 14px rgba(56, 232, 255, 0.12);
      color: #ffffff;
    }

    .btn-header-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 18px;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.86);
      border: 1px solid rgba(255, 255, 255, 0.22);
      background: transparent;
      transition: all 0.2s ease;
    }

    .btn-header-secondary:hover {
      border-color: rgba(255, 255, 255, 0.55);
      color: #ffffff;
      background: rgba(255, 255, 255, 0.04);
      transform: translateY(-2px);
    }

    .menu-toggle {
      width: 44px;
      height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: #fff;
      background: rgba(255, 255, 255, 0.04);
      cursor: pointer;
      transition: border-color 0.2s ease, background 0.2s ease;
    }

    .menu-toggle:hover {
      border-color: rgba(56, 232, 255, 0.45);
      background: rgba(56, 232, 255, 0.06);
    }

    .mobile-panel {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      background: linear-gradient(180deg, #0d1526 0%, #111c33 100%);
      padding: 12px 20px 24px;
    }

    .mobile-panel .nav-link {
      width: 100%;
      min-height: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .mobile-panel .nav-link.active {
      color: #a5f3fc;
    }

    .hero-section {
      background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
    }

    .hero-title {
      font-size: 34px;
      line-height: 1.18;
      font-weight: 800;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
    }

    @media (min-width: 768px) {
      .hero-title {
        font-size: 48px;
      }
    }

    @media (min-width: 1280px) {
      .hero-title {
        font-size: 56px;
        line-height: 1.16;
      }
    }

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

    .breadcrumb a {
      transition: color 0.2s ease;
    }

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

    .hero-panel {
      border-radius: 28px;
      background: linear-gradient(165deg, rgba(255, 255, 255, 0.94), rgba(238, 246, 255, 0.86));
      border: 1px solid rgba(226, 232, 240, 0.9);
      box-shadow: var(--shadow-card-hover);
    }

    .hero-stat {
      border-left: 2px solid #e6edf8;
      padding-left: 18px;
    }

    .hero-stat:first-child {
      border-left: none;
      padding-left: 0;
    }

    .anchor-wrap {
      position: sticky;
      top: 76px;
      z-index: 45;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      border-top: 1px solid rgba(226, 232, 240, 0.7);
      border-bottom: 1px solid #eef2f7;
    }

    .anchor-pills {
      display: flex;
      align-items: center;
      overflow-x: auto;
      gap: 10px;
      padding: 14px 0;
      scrollbar-width: none;
    }

    .anchor-pills::-webkit-scrollbar {
      display: none;
    }

    .anchor-pill {
      display: inline-flex;
      align-items: center;
      min-height: 40px;
      padding: 0 18px;
      border-radius: 999px;
      background: #f4f7fb;
      border: 1px solid #e8eef5;
      color: #334155;
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      transition: all 0.2s ease;
    }

    .anchor-pill:hover {
      color: var(--primary);
      border-color: var(--border-brand);
      background: #eef6ff;
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: var(--bg-mist);
      padding: 5px 14px;
      border-radius: 999px;
    }

    .section-title {
      font-size: 28px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--primary-deep);
      letter-spacing: -0.3px;
    }

    @media (min-width: 640px) {
      .section-title {
        font-size: 36px;
      }
    }

    .plan-row {
      position: relative;
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 20px;
      padding: 26px 24px;
      border-radius: 20px;
      background: #ffffff;
      border: 1px solid #e8eef5;
      box-shadow: var(--shadow-card);
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }

    @media (min-width: 768px) {
      .plan-row {
        grid-template-columns: 72px 1fr 220px;
        align-items: center;
        gap: 28px;
      }
    }

    .plan-row:hover {
      border-color: #bdd3ff;
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }

    .plan-step {
      width: 54px;
      height: 54px;
      border-radius: 18px;
      background: linear-gradient(145deg, #eef6ff, #ffffff);
      border: 1px solid #dcebff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 800;
      color: var(--primary);
    }

    .plan-tag {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 2px 12px;
      background: #f4f7fb;
      border: 1px solid #e2e8f0;
      border-radius: 999px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .plan-link {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 14px;
      color: var(--primary);
      font-weight: 600;
      transition: gap 0.2s ease, color 0.2s ease;
    }

    .plan-link:hover {
      color: var(--primary-dark);
      gap: 7px;
    }

    .plan-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 15px;
      color: #334155;
      line-height: 1.6;
    }

    .plan-row:nth-child(2) {
      margin-left: 0;
    }

    .plan-row:nth-child(3) {
      margin-left: 6%;
    }

    .plan-row:nth-child(4) {
      margin-left: 0;
      margin-right: 6%;
    }

    .plan-row:nth-child(5) {
      margin-left: 3%;
    }

    @media (max-width: 767px) {
      .plan-row:nth-child(3),
      .plan-row:nth-child(4),
      .plan-row:nth-child(5) {
        margin-left: 0;
        margin-right: 0;
      }
    }

    .process-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .process-item {
      position: relative;
      display: grid;
      grid-template-columns: 60px 1fr;
      gap: 20px;
      padding: 20px 0;
      border-bottom: 1px solid #edf2f9;
    }

    @media (min-width: 768px) {
      .process-item {
        grid-template-columns: 80px 200px 1fr;
        align-items: center;
        gap: 32px;
        padding: 26px 0;
      }
    }

    .process-index {
      font-size: 16px;
      font-weight: 800;
      color: rgba(30, 94, 255, 0.65);
      padding: 10px 0;
    }

    .process-line {
      width: 2px;
      height: 100%;
      background: linear-gradient(180deg, #bfdcff 0%, rgba(191, 220, 255, 0.2) 100%);
    }

    .process-desc {
      font-size: 15px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    .coverage-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 18px 0;
      border-bottom: 1px solid #edf2f9;
    }

    .coverage-icon {
      flex: none;
      width: 34px;
      height: 34px;
      border-radius: 10px;
      background: #eef6ff;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
    }

    .faq-list {
      max-width: 960px;
      margin-left: auto;
      margin-right: auto;
    }

    .faq-item {
      border-bottom: 1px solid #e6edf5;
      transition: border-color 0.3s ease;
    }

    .faq-item.open {
      border-bottom-color: #bdd3ff;
    }

    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      padding: 22px 4px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      cursor: pointer;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: #1e293b;
    }

    .faq-icon {
      flex: none;
      width: 32px;
      height: 32px;
      border-radius: 999px;
      border: 1px solid #d4e1f0;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .faq-answer {
      display: none;
      padding: 0 20px 24px 4px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
    }

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

    .cta-panel {
      border-radius: 28px;
      background: linear-gradient(120deg, #eef4fd 0%, #f9fbff 60%, #eef6ff 100%);
      border: 1px solid rgba(255, 255, 255, 0.85);
      box-shadow: 0 18px 40px -22px rgba(17, 45, 100, 0.22);
      overflow: hidden;
      position: relative;
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      top: -60px;
      right: -40px;
      width: 220px;
      height: 220px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.14) 0%, transparent 70%);
      pointer-events: none;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 28px;
      border-radius: 10px;
      background: var(--primary);
      color: #ffffff;
      font-size: 15px;
      font-weight: 600;
      border: 1px solid transparent;
      box-shadow: var(--shadow-cta);
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary:hover {
      background: #0943c4;
      transform: translateY(-2px);
      box-shadow: 0 10px 28px -8px rgba(30, 94, 255, 0.5);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 24px;
      border-radius: 10px;
      background: #ffffff;
      border: 1px solid #cbdaf0;
      color: var(--primary-dark);
      font-size: 15px;
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .btn-outline:hover {
      border-color: var(--border-brand);
      background: #f4f8ff;
      transform: translateY(-2px);
    }

    .footer-bg {
      background: linear-gradient(180deg, #0c1428 0%, #080e1c 100%);
      color: rgba(255, 255, 255, 0.85);
    }

    .footer-link-item {
      display: inline-block;
      padding: 4px 0;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      transition: color 0.2s ease, padding-left 0.2s ease;
    }

    .footer-link-item:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    :focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 4px;
    }

    @media (hover: hover) {
      .plan-row,
      .btn-primary,
      .btn-outline,
      .anchor-pill {
        transition: all 0.25s ease;
      }
    }

/* roulang page: category3 */
:root {
      --primary: #1e5eff;
      --primary-deep: #0d2a66;
      --primary-dark: #0a1b45;
      --cyan: #38e8ff;
      --cyan-soft: #22d3ee;
      --nav-dark: #0b1220;
      --nav-soft: #111c33;
      --blue-text: #0f1e3d;
      --body-text: #1e293b;
      --muted-text: #5b6f8c;
      --light-text: #94a3b8;
      --soft-bg: #f4f7fb;
      --soft-blue: #eef6ff;
      --line-color: #e4ebf3;
      --line-blue: #c7d9f5;
      --shadow-card: 0 10px 30px -12px rgba(17, 45, 100, 0.12);
      --radius-lg: 16px;
      --radius-md: 10px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font-stack);
      background: #ffffff;
      color: var(--body-text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

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

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

    button,
    input,
    textarea,
    select {
      font: inherit;
      border: 0;
      background: none;
    }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 4px;
    }

    .container-site {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    @media (max-width: 768px) {
      .container-site {
        padding-left: 20px;
        padding-right: 20px;
      }
    }

    .brand-text {
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #ffffff;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .brand-dot {
      display: inline-block;
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--cyan), var(--cyan-soft));
      box-shadow: 0 0 8px rgba(56, 232, 255, 0.72);
      margin-top: 3px;
    }

    .nav-dark {
      background: linear-gradient(120deg, #0b1220, #0f1830 54%, #121f38);
      color: rgba(255, 255, 255, 0.82);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-glow-line {
      height: 1.5px;
      background: linear-gradient(90deg, transparent, rgba(56, 232, 255, 0.72), rgba(30, 94, 255, 0.72), rgba(56, 232, 255, 0.4), transparent);
    }

    .nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 6px 12px;
      color: rgba(214, 226, 244, 0.82);
      font-size: 15px;
      font-weight: 500;
      border-radius: 8px;
      transition: color 0.2s ease, background 0.2s ease, text-shadow 0.2s ease;
    }

    .nav-link:hover {
      color: #e6ffffff;
      background: rgba(255, 255, 255, 0.06);
      text-shadow: 0 0 14px rgba(56, 232, 255, 0.36);
    }

    .nav-link.active {
      color: #dffcfe;
      font-weight: 600;
      text-shadow: 0 0 10px rgba(56, 232, 255, 0.5);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 4px;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--cyan), var(--cyan-soft), transparent);
      box-shadow: 0 0 8px rgba(56, 232, 255, 0.64);
    }

    .btn-nav-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 8px 18px;
      border: 1px solid rgba(150, 190, 240, 0.42);
      border-radius: 10px;
      color: rgba(225, 238, 255, 0.9);
      font-size: 14px;
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .btn-nav-outline:hover {
      border-color: rgba(56, 232, 255, 0.55);
      color: #ffffff;
      transform: translateY(-1px);
      box-shadow: 0 6px 14px -8px rgba(56, 232, 255, 0.22);
    }

    .btn-nav-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 8px 20px;
      border-radius: 10px;
      background: linear-gradient(120deg, rgba(56, 232, 255, 0.2), rgba(30, 94, 255, 0.22));
      border: 1px solid rgba(56, 232, 255, 0.52);
      color: #eafdff;
      font-size: 14px;
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .btn-nav-neon:hover {
      transform: translateY(-2px);
      border-color: #7ff4ff;
      box-shadow: 0 0 18px rgba(56, 232, 255, 0.4), 0 8px 18px -10px rgba(30, 94, 255, 0.6);
      color: #ffffff;
    }

    #mobile-nav {
      display: none;
      background: linear-gradient(180deg, #0b1220, #0e1629 92%);
      padding: 12px 20px 22px;
      border-bottom: 1px solid rgba(56, 232, 255, 0.22);
    }

    #mobile-nav.open {
      display: block;
    }

    .mobile-menu-link {
      display: flex;
      align-items: center;
      min-height: 48px;
      padding: 0 10px;
      color: rgba(220, 233, 255, 0.86);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 15px;
      font-weight: 500;
      border-radius: 6px;
    }

    .mobile-menu-link:hover,
    .mobile-menu-link.mobile-active {
      color: #dffcfe;
      background: rgba(56, 232, 255, 0.08);
      text-shadow: 0 0 10px rgba(56, 232, 255, 0.28);
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 12px;
      background: var(--soft-blue);
      border: 1px solid rgba(30, 94, 255, 0.12);
      border-radius: 999px;
      color: #1e4fae;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.01em;
    }

    .section-title {
      color: #0a1830;
      font-weight: 800;
      letter-spacing: -0.015em;
      line-height: 1.3;
    }

    .section-subtitle {
      color: var(--muted-text);
      max-width: 620px;
      line-height: 1.8;
    }

    .btn-blue {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 10px 26px;
      background: var(--primary);
      color: #ffffff;
      font-size: 15px;
      font-weight: 600;
      border-radius: 12px;
      box-shadow: 0 8px 20px -6px rgba(30, 94, 255, 0.42);
      transition: all 0.22s ease;
    }

    .btn-blue:hover {
      transform: translateY(-2px);
      background: #0b45d4;
      box-shadow: 0 10px 24px -6px rgba(30, 94, 255, 0.55);
    }

    .btn-blue:active {
      transform: scale(0.98);
    }

    .btn-light-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 10px 26px;
      border: 1px solid #c6d6ea;
      border-radius: 12px;
      background: #ffffff;
      color: #1e4fae;
      font-size: 15px;
      font-weight: 600;
      transition: all 0.22s ease;
    }

    .btn-light-outline:hover {
      border-color: var(--primary);
      background: var(--soft-blue);
      transform: translateY(-2px);
    }

    .btn-light-outline:active {
      transform: scale(0.98);
    }

    .hero-protocol-bg {
      background:
        linear-gradient(108deg, rgba(245, 250, 255, 0.98) 0%, rgba(232, 242, 255, 0.94) 44%, rgba(255, 255, 255, 0.92) 88%),
        url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid #e6edf6;
    }

    .hero-breadcrumb {
      display: inline-flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      color: #6f83a5;
      font-size: 14px;
    }

    .hero-breadcrumb a {
      color: #315fa8;
      transition: color 0.18s ease;
    }

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

    .hero-h1 {
      color: #0a1830;
      line-height: 1.15;
      letter-spacing: -0.03em;
      font-weight: 800;
    }

    .hero-summary {
      color: #45608c;
      max-width: 630px;
      line-height: 1.85;
    }

    .hero-preview {
      position: relative;
      overflow: hidden;
      border: 1px solid #c4d6ef;
      border-radius: 18px;
      background: #ffffff;
    }

    .hero-preview img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    .hero-preview-desc {
      padding: 14px 16px;
      background: #ffffff;
      border-top: 1px solid #dee9f7;
      color: #54667f;
      font-size: 13px;
    }

    .overview-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      border-top: 1px solid #dae4f0;
      border-bottom: 1px solid #dae4f0;
    }

    .overview-cell {
      padding: 28px 26px;
      border-right: 1px solid #e6edf5;
    }

    .overview-cell:last-child {
      border-right: 0;
    }

    .overview-no {
      display: block;
      color: var(--primary);
      font-size: 14px;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .overview-title {
      color: #12233f;
      font-weight: 700;
      font-size: 17px;
      margin-bottom: 8px;
    }

    .overview-copy {
      color: #667a96;
      font-size: 14px;
      line-height: 1.8;
    }

    @media (max-width: 1023px) {
      .overview-list {
        grid-template-columns: repeat(2, 1fr);
      }

      .overview-cell:nth-child(2) {
        border-right: 0;
      }

      .overview-cell:nth-child(1),
      .overview-cell:nth-child(2) {
        border-bottom: 1px solid #e6edf5;
      }
    }

    @media (max-width: 640px) {
      .overview-list {
        grid-template-columns: 1fr;
      }

      .overview-cell {
        border-bottom: 1px solid #e6edf5;
        border-right: 0;
      }

      .overview-cell:last-child {
        border-bottom: 0;
      }
    }

    .protocol-side {
      border-top: 3px solid #1e5eff;
      background: rgba(255, 255, 255, 0.72);
      padding: 30px 0 0;
    }

    .protocol-side-side {
      border-top-color: #10a6b5;
      background: rgba(244, 249, 255, 0.6);
    }

    .side-cap {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding-bottom: 18px;
      border-bottom: 1px solid #dce7f3;
    }

    .side-cap-icon {
      flex: none;
      width: 46px;
      height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #e3effe;
      border-radius: 12px;
      color: #1e5eff;
    }

    .side-cap h3 {
      color: #0f1e3d;
      font-size: 18px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 4px;
    }

    .side-cap p {
      color: #6a7e9b;
      font-size: 13px;
      line-height: 1.7;
    }

    .protocol-list {
      list-style: none;
      margin: 0;
      padding: 4px 0 0;
    }

    .protocol-list li {
      position: relative;
      padding: 18px 0 18px 50px;
      border-bottom: 1px solid #edf1f7;
    }

    .protocol-list li:last-child {
      border-bottom: 0;
    }

    .protocol-index {
      position: absolute;
      left: 0;
      top: 18px;
      width: 30px;
      height: 30px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid #b9cdf0;
      border-radius: 8px;
      background: #f5f9ff;
      color: #1e5eff;
      font-size: 13px;
      font-weight: 800;
    }

    .protocol-list h4 {
      color: #162a4a;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 5px;
    }

    .protocol-list p {
      color: #5f7390;
      font-size: 14px;
      line-height: 1.75;
      margin: 0;
    }

    .process-list {
      list-style: none;
      padding: 0;
      margin: 0;
      position: relative;
    }

    .process-list li {
      position: relative;
      padding: 18px 0 18px 58px;
      border-bottom: 1px solid #eaeff6;
    }

    .process-list li:last-child {
      border-bottom: 0;
    }

    .process-marker {
      position: absolute;
      left: 0;
      top: 18px;
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: #ffffff;
      border: 1px solid #bad0ed;
      color: #1e5eff;
      font-size: 14px;
      font-weight: 700;
    }

    .process-list h4 {
      color: #142947;
      font-size: 15px;
      font-weight: 600;
      margin: 0 0 4px;
    }

    .process-list p {
      color: #6a7d98;
      font-size: 13px;
      line-height: 1.75;
      margin: 0;
      max-width: 560px;
    }

    .panel-light {
      background: #f2f6fb;
      border: 1px solid #dfe7f2;
      padding: 28px 30px;
    }

    .panel-light .point-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px 0;
      border-bottom: 1px solid #dae4f0;
    }

    .panel-light .point-item:last-child {
      border-bottom: 0;
    }

    .panel-icon {
      flex: none;
      margin-top: 3px;
      width: 18px;
      height: 18px;
      color: var(--primary);
    }

    .faq-item {
      border-bottom: 1px solid #e1e9f4;
      padding: 6px 0;
    }

    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 20px 8px 18px 0;
      cursor: pointer;
    }

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

    .faq-num {
      flex: none;
      width: 34px;
      height: 34px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid #b9cdf0;
      border-radius: 6px;
      background: #f6faff;
      color: #1e5eff;
      font-size: 13px;
      font-weight: 700;
    }

    .faq-qtext {
      flex: 1;
      color: #142947;
      font-size: 16px;
      font-weight: 600;
      line-height: 1.5;
    }

    .faq-icon {
      flex: none;
      width: 28px;
      height: 28px;
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: #edf4ff;
      color: #1e5eff;
      font-size: 20px;
      font-weight: 500;
      transition: transform 0.2s ease, background 0.2s ease;
    }

    .faq-icon::before {
      content: "+";
      line-height: 1;
    }

    details[open] .faq-icon {
      background: #e1efff;
      transform: rotate(45deg);
    }

    .faq-answer {
      padding: 0 8px 22px 58px;
      color: #5f7390;
      line-height: 1.85;
      max-width: 860px;
    }

    .cta-panel {
      background:
        linear-gradient(120deg, #e8f0ff 0%, #f9fbff 100%);
      border-top: 1px solid #d7e4f5;
      border-bottom: 1px solid #d7e4f5;
    }

    .footer-bg {
      background: linear-gradient(145deg, #0b1220, #10182d);
      color: rgba(255, 255, 255, 0.8);
    }

    .footer-link-item {
      color: rgba(226, 236, 250, 0.66);
      transition: color 0.2s ease, text-shadow 0.2s ease;
    }

    .footer-link-item:hover {
      color: #ffffff;
      text-shadow: 0 0 10px rgba(56, 232, 255, 0.22);
    }

    @media (hover: hover) {
      .nav-link,
      .btn-nav-outline,
      .btn-nav-neon,
      .btn-blue,
      .btn-light-outline,
      .footer-link-item {
        transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.22s ease;
      }
    }

    @media (max-width: 1023px) {
      .hero-protocol-bg {
        background-image:
          linear-gradient(180deg, rgba(246, 251, 255, 0.98), rgba(245, 250, 255, 0.96)),
          url('/assets/images/backpic/back-1.png');
      }
    }

/* roulang page: category4 */
:root {
    --primary: #1e5eff;
    --primary-dark: #0d2a66;
    --navy: #0f1e3d;
    --cyan: #38e8ff;
    --cyan-2: #8b7bff;
    --bg-soft: #f4f7fb;
    --bg-blue: #eef6ff;
    --text-main: #1e293b;
    --text-sub: #475569;
    --text-weak: #94a3b8;
    --border: #e2e8f0;
    --border-light: #bdd3ff;
    --shadow-card: 0 2px 10px rgba(15, 35, 80, 0.06);
    --shadow-hover: 0 18px 44px -12px rgba(20, 50, 120, 0.18);
    --shadow-cta: 0 8px 20px -6px rgba(30, 94, 255, 0.45);
    --radius-card: 16px;
    --radius-large: 24px;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: #ffffff;
    color: var(--text-main);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  button, input, textarea, select { font: inherit; }
  .container-site { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
  @media (min-width: 768px) { .container-site { padding-left: 32px; padding-right: 32px; } }
  @media (min-width: 1024px) { .container-site { padding-left: 24px; padding-right: 24px; } }

  .site-header {
    background: linear-gradient(135deg, #0b1220 0%, #111c33 100%);
    position: sticky; top: 0; z-index: 50;
  }
  .site-header::after {
    content: "";
    display: block;
    height: 2px;
    background: linear-gradient(90deg, transparent, #1e5eff, #38e8ff, #8b7bff, transparent);
    position: absolute; bottom: 0; left: 0; right: 0;
  }
  .brand-text {
    color: #f8fafc;
    font-weight: 800;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .brand-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 8px rgba(56, 232, 255, 0.9), 0 0 20px rgba(56, 232, 255, 0.4);
  }
  .nav-link {
    display: inline-block;
    font-size: 15px;
    color: rgba(226, 232, 240, 0.78);
    font-weight: 500;
    padding: 10px 4px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s, text-shadow 0.2s;
  }
  .nav-link:hover { color: #ffffff; }
  .nav-link.active, .nav-link[aria-current="page"] {
    color: #ffffff;
    border-bottom-color: var(--cyan);
    text-shadow: 0 0 8px rgba(56, 232, 255, 0.55), 0 0 24px rgba(56, 232, 255, 0.2);
  }
  .btn-nav-primary, .btn-nav-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, background 0.2s, color 0.2s;
  }
  .btn-nav-primary {
    color: #ffffff;
    border: 1px solid rgba(56, 232, 255, 0.55);
    background: linear-gradient(135deg, rgba(30, 94, 255, 0.35), rgba(13, 42, 102, 0.55));
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06), 0 0 12px rgba(56,232,255,0.12);
  }
  .btn-nav-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 14px rgba(56, 232, 255, 0.28), 0 6px 18px rgba(56, 232, 255, 0.18);
  }
  .btn-nav-ghost {
    color: rgba(226, 232, 240, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.36);
    background: transparent;
  }
  .btn-nav-ghost:hover {
    border-color: rgba(56, 232, 255, 0.6);
    color: #ffffff;
    transform: translateY(-2px);
  }
  .mobile-menu-panel {
    display: none;
    background: linear-gradient(180deg, #0b1220, #0b1320);
    border-top: 1px solid rgba(56, 232, 255, 0.08);
  }
  .mobile-menu-panel.open { display: block; }
  .mobile-menu-panel a {
    display: flex;
    align-items: center;
    min-height: 50px;
    color: rgba(241, 245, 249, 0.86);
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    padding: 0 20px;
    font-size: 16px;
  }
  .mobile-menu-panel a:active { background: rgba(56, 232, 255, 0.08); }
  .mobile-menu-panel a.active { color: var(--cyan); }

  .hero-cat4 {
    background-color: #f8fbff;
    position: relative;
    overflow: hidden;
  }
  .hero-cover-mask { background: linear-gradient(90deg, rgba(255,255,255,0.98) 0%, rgba(248,251,255,0.92) 50%, rgba(240,247,255,0.72) 100%); }

  .section-gap { padding: 80px 0; }
  @media (max-width: 640px) { .section-gap { padding: 52px 0; } }

  .eyebrow-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-blue);
    border: 1px solid #cfe3ff;
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
  }
  .section-title-wrap { max-width: 760px; }
  .section-title {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 800;
    color: var(--navy);
    line-height: 1.3;
    letter-spacing: -0.01em;
  }
  .section-sub { color: var(--text-sub); font-size: 15px; }
  .title-flag {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.12);
    vertical-align: middle;
  }

  .service-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  }
  .service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-light);
  }
  .icon-orb {
    width: 52px; height: 52px;
    border-radius: 18px;
    background: var(--bg-blue);
    border: 1px solid #dbe8ff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
  }
  .text-link-inline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    transition: gap 0.2s;
  }
  .text-link-inline:hover { gap: 10px; color: #0943c4; }
  .line-div { border-top: 1px solid #ecf1f7; margin: 20px 0; }

  .step-badge {
    width: 42px; height: 42px;
    border-radius: 50%;
    background: var(--bg-blue);
    border: 1px dashed #b9d3ff;
    color: var(--primary);
    font-weight: 800;
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .step-arrow { color: var(--cyan); opacity: 0.7; flex: none; }

  .faq-panel { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: #fff; transition: border-color 0.2s, box-shadow 0.2s; }
  .faq-panel.open { border-color: var(--primary); box-shadow: 0 12px 30px -16px rgba(30, 94, 255, 0.28); }
  .faq-panel .faq-q {
    display: flex; align-items: center; gap: 14px;
    width: 100%;
    background: none;
    border: 0;
    padding: 18px 20px;
    text-align: left;
    cursor: pointer;
    color: var(--navy);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.5;
  }
  .faq-icon {
    width: 30px; height: 30px;
    flex: none;
    border-radius: 50%;
    background: var(--bg-blue);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s, background 0.3s;
  }
  .faq-panel.open .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
  .faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.3s ease; }
  .faq-panel.open .faq-a { grid-template-rows: 1fr; }
  .faq-a-inner { overflow: hidden; }
  .faq-a-content { padding: 0 20px 18px 64px; font-size: 14px; color: var(--text-sub); }

  .form-card-cat { background: #fff; border: 1px solid var(--border); border-radius: 22px; box-shadow: 0 20px 50px -20px rgba(15, 45, 110, 0.22); }
  .form-field {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fafcff;
    padding: 13px 16px;
    font-size: 14px;
    color: var(--text-main);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  }
  .form-field:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(30, 94, 255, 0.12);
    background: #fff;
  }
  .field-label { font-size: 14px; font-weight: 600; color: var(--navy); }
  .field-star { color: #e74c3c; }
  .form-msg-error { margin-top: 4px; font-size: 12px; color: #e74c3c; opacity: 0; transition: opacity 0.2s; }
  .form-field.invalid { border-color: #e74c3c; }
  .form-field.invalid + .form-msg-error { opacity: 1; }

  .btn-primary-lg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: var(--shadow-cta);
    border: 0;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
  }
  .btn-primary-lg:hover { background: #0943c4; transform: translateY(-2px); box-shadow: 0 12px 26px -8px rgba(30, 94, 255, 0.55); }
  .btn-primary-lg:active { transform: scale(0.98); }
  .btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 24px;
    border-radius: 12px;
    border: 1px solid #c7d8f2;
    background: #fff;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 14px;
    transition: transform 0.2s, border-color 0.2s, background 0.2s, color 0.2s;
  }
  .btn-outline-light:hover { border-color: var(--primary); background: var(--bg-blue); color: var(--primary); transform: translateY(-2px); }

  .footer-bg { background: #080d18; color: rgba(241, 245, 249, 0.88); }
  .footer-link-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(241, 245, 249, 0.72);
    line-height: 1.8;
    transition: color 0.2s, transform 0.2s;
  }
  .footer-link-item:hover { color: var(--cyan); transform: translateX(3px); }
  .float-note {
    position: sticky;
    top: 110px;
    border: 1px solid #dceaff;
    background: rgba(255,255,255,0.7);
    border-radius: 16px;
  }
  @media (max-width: 1023px) { .float-note { position: relative; top: auto; } }
  .focus-ring:focus-visible, a:focus-visible, button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
    border-radius: 8px;
  }
  .step-card-line { border-left: 1px solid #dfe7f2; }
  @media (min-width: 1024px) { .step-card-line { border-left: 0; } }