/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --bg-primary: #070D1F;
  --bg-secondary: #0B1230;
  --bg-topbar: #050A18;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.10);
  --card-border-hover: rgba(0, 229, 229, 0.35);
  --accent: #00E5E5;
  --accent-light: #33EBEB;
  --accent-blue: #2B7FFF;
  --warning: #FFA800;
  --success: #00C48C;
  --title-color: #F0F4FF;
  --text-color: #B6C0D4;
  --muted-color: #7B849C;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', 'SF Mono', Consolas, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-badge: 999px;
  --shadow-card: 0 0 0 1px rgba(255,255,255,0.05), 0 12px 40px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(0,229,229,0.35), 0 4px 20px rgba(0,229,229,0.2);
  --space-section: 96px;
  --container-width: 1200px;
  --transition: 0.3s ease;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); background: var(--bg-primary); color: var(--text-color); line-height: 1.75; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
::selection { background: rgba(0, 229, 229, 0.3); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== 容器 ========== */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; position: relative; }
.section-alt { background: var(--bg-secondary); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .eyebrow { display: inline-block; font-size: 13px; letter-spacing: 3px; color: var(--accent); text-transform: uppercase; margin-bottom: 12px; font-weight: 600; }
.section-head h2 { font-size: 32px; color: var(--title-color); font-weight: 700; line-height: 1.3; }
.section-head p { max-width: 640px; margin: 16px auto 0; font-size: 16px; color: var(--muted-color); }

/* ========== 顶部信息条 ========== */
.topbar { background: var(--bg-topbar); height: 36px; display: flex; align-items: center; border-bottom: 1px solid rgba(255, 255, 255, 0.04); font-size: 13px; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.topbar-domain { color: var(--muted-color); font-family: var(--font-mono); font-size: 12px; letter-spacing: 1px; }
.topbar-tip { color: rgba(255, 255, 255, 0.5); text-align: center; flex: 1; padding: 0 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-tip strong { color: rgba(255, 255, 255, 0.8); font-weight: 500; }
.topbar-entry { color: var(--accent); font-weight: 500; white-space: nowrap; transition: opacity var(--transition); }
.topbar-entry:hover { opacity: 0.8; }

/* ========== 主导航 ========== */
.main-nav { position: sticky; top: 0; z-index: 100; height: 72px; background: rgba(255, 255, 255, 0.04); backdrop-filter: blur(20px) saturate(150%); -webkit-backdrop-filter: blur(20px) saturate(150%); border-bottom: 1px solid rgba(255, 255, 255, 0.06); transition: background var(--transition); }
.main-nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--title-color); letter-spacing: 0.5px; }
.nav-logo .logo-cn { color: #fff; }
.nav-logo .logo-cn span { color: var(--accent); }
.nav-logo .logo-en { font-family: var(--font-mono); font-size: 12px; color: var(--muted-color); letter-spacing: 2px; font-weight: 400; padding-left: 10px; border-left: 1px solid rgba(255,255,255,0.15); }
.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-link { font-size: 15px; color: var(--text-color); font-weight: 400; position: relative; padding: 6px 0; transition: color var(--transition); }
.nav-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent); box-shadow: 0 0 8px rgba(0,229,229,0.5); transition: width var(--transition); }
.nav-link:hover { color: #fff; }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #fff; font-weight: 500; }
.nav-link.active::after { width: 100%; box-shadow: 0 0 8px rgba(0,229,229,0.8); }
.nav-cta { font-size: 14px; font-weight: 600; color: var(--bg-primary); background: var(--accent); padding: 10px 24px; border-radius: var(--radius-sm); transition: background var(--transition), box-shadow var(--transition); box-shadow: 0 0 12px rgba(0,229,229,0.15); }
.nav-cta:hover { background: var(--accent-light); box-shadow: var(--shadow-glow); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; z-index: 101; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* 移动端抽屉 */
.mobile-drawer { position: fixed; top: 0; right: -320px; width: 300px; height: 100vh; background: rgba(7, 13, 31, 0.98); backdrop-filter: blur(30px); z-index: 99; transition: right 0.35s ease; padding: 100px 32px 32px; display: flex; flex-direction: column; gap: 8px; border-left: 1px solid rgba(255, 255, 255, 0.08); }
.mobile-drawer.open { right: 0; }
.mobile-drawer a { font-size: 17px; color: var(--text-color); padding: 14px 8px; border-bottom: 1px solid rgba(255, 255, 255, 0.05); font-weight: 400; }
.mobile-drawer a:hover, .mobile-drawer a.active { color: var(--accent); }
.mobile-drawer-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6); z-index: 98; opacity: 0; visibility: hidden; transition: var(--transition); }
.mobile-drawer-backdrop.show { opacity: 1; visibility: visible; }

/* ========== Hero ========== */
.hero { min-height: 640px; display: flex; align-items: center; padding: 80px 0; position: relative; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 40px 40px; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: radial-gradient(circle at 30% 20%, rgba(0,229,229,0.10), transparent 60%); pointer-events: none; }
.hero::after { content: ''; position: absolute; right: -200px; top: 50%; transform: translateY(-50%); width: 600px; height: 600px; background: radial-gradient(circle, rgba(43,127,255,0.08), transparent 70%); pointer-events: none; }
.hero .container { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 60px; position: relative; z-index: 2; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(0, 229, 229, 0.1); border: 1px solid rgba(0, 229, 229, 0.2); color: var(--accent); font-size: 13px; font-weight: 500; padding: 6px 16px; border-radius: var(--radius-badge); margin-bottom: 24px; letter-spacing: 0.5px; }
.hero-badge::before { content: ''; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero h1 { font-size: 44px; line-height: 1.25; color: var(--title-color); font-weight: 800; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 .highlight { color: var(--accent); }
.hero-sub { font-size: 17px; color: var(--text-color); max-width: 480px; margin-bottom: 32px; line-height: 1.8; }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 15px; font-weight: 600; padding: 14px 32px; border-radius: var(--radius-sm); transition: all var(--transition); }
.btn-primary { background: var(--accent); color: #0A0F1F; box-shadow: 0 0 20px rgba(0, 229, 229, 0.25), 0 4px 16px rgba(0, 229, 229, 0.15); }
.btn-primary:hover { background: var(--accent-light); box-shadow: var(--shadow-glow); transform: translateY(-2px); }
.btn-primary:active { transform: translateY(1px); box-shadow: 0 0 10px rgba(0, 229, 229, 0.2); }
.btn-secondary { background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.2); color: #fff; backdrop-filter: blur(10px); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); background: rgba(0, 229, 229, 0.05); }
.btn-text { color: var(--accent); font-size: 15px; font-weight: 500; padding: 0; display: inline-flex; align-items: center; gap: 6px; transition: gap var(--transition); }
.btn-text:hover { gap: 12px; }
.hero-visual { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--card-border); }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(7, 13, 31, 0.4), transparent 60%); }
.hero-visual-overlay { position: absolute; bottom: 20px; left: 20px; z-index: 2; background: rgba(7, 13, 31, 0.8); backdrop-filter: blur(16px); border-radius: 12px; padding: 12px 20px; border: 1px solid rgba(255,255,255,0.1); }
.hero-visual-overlay p { font-size: 13px; color: var(--text-color); }
.hero-visual-overlay strong { font-family: var(--font-mono); color: var(--accent); font-size: 22px; font-weight: 600; }

/* ========== 指标看板 ========== */
.stats-strip { margin-top: -40px; position: relative; z-index: 5; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-card { background: var(--card-bg); backdrop-filter: blur(20px) saturate(150%); -webkit-backdrop-filter: blur(20px) saturate(150%); border: 1px solid var(--card-border); border-radius: var(--radius-lg); padding: 32px 28px; position: relative; overflow: hidden; transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition); box-shadow: var(--shadow-card); }
.stat-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent); }
.stat-card:hover { border-color: var(--card-border-hover); transform: translateY(-4px); box-shadow: 0 0 0 1px rgba(0, 229, 229, 0.1), 0 16px 48px rgba(0, 0, 0, 0.5); }
.stat-number { font-family: var(--font-mono); font-size: 40px; font-weight: 700; color: var(--accent); display: block; margin-bottom: 8px; line-height: 1.2; }
.stat-label { font-size: 15px; color: var(--title-color); font-weight: 600; margin-bottom: 6px; }
.stat-desc { font-size: 13px; color: var(--muted-color); line-height: 1.6; }
.stat-dot { position: absolute; right: 20px; bottom: 20px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); opacity: 0.4; box-shadow: 0 0 12px var(--accent); }

/* ========== 服务矩阵 ========== */
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-card { background: var(--card-bg); backdrop-filter: blur(20px) saturate(150%); border: 1px solid var(--card-border); border-radius: var(--radius-lg); padding: 36px 32px; position: relative; transition: all var(--transition); box-shadow: var(--shadow-card); background-image: linear-gradient(to bottom, rgba(255,255,255,0.03), transparent); display: flex; flex-direction: column; min-height: 260px; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent); }
.service-card:hover { border-color: var(--card-border-hover); transform: translateY(-4px); box-shadow: 0 0 40px rgba(0, 229, 229, 0.08), 0 16px 48px rgba(0, 0, 0, 0.5); }
.service-card:nth-child(1) { grid-column: 1 / 2; }
.service-card:nth-child(2) { grid-column: 2 / 3; transform: translateY(20px); }
.service-card:nth-child(3) { grid-column: 1 / 2; transform: translateY(20px); }
.service-card:nth-child(4) { grid-column: 2 / 3; }
.service-card:nth-child(2):hover, .service-card:nth-child(3):hover { transform: translateY(16px); }
.service-icon { width: 56px; height: 56px; border-radius: 14px; background: rgba(0, 229, 229, 0.12); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; border: 1px solid rgba(0, 229, 229, 0.2); }
.service-icon svg { width: 28px; height: 28px; stroke: var(--accent); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { font-size: 20px; color: var(--title-color); font-weight: 600; margin-bottom: 12px; }
.service-card p { font-size: 14px; line-height: 1.75; color: var(--text-color); margin-bottom: 20px; flex-grow: 1; }
.service-badge { position: absolute; top: 20px; right: 20px; background: rgba(0, 229, 229, 0.15); color: var(--accent); font-size: 12px; padding: 4px 14px; border-radius: var(--radius-badge); font-weight: 500; }
.service-badge.alt { background: rgba(255, 168, 0, 0.15); color: var(--warning); }
.service-link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-size: 14px; font-weight: 500; transition: gap var(--transition); }
.service-link:hover { gap: 10px; }

/* ========== 结果对比 ========== */
.compare-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: center; }
.compare-col { background: var(--card-bg); backdrop-filter: blur(20px); border-radius: var(--radius-lg); padding: 36px 32px; border: 1px solid var(--card-border); }
.compare-vs { width: 64px; height: 64px; border-radius: 50%; background: rgba(0, 229, 229, 0.1); border: 1px solid rgba(0, 229, 229, 0.3); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); color: var(--accent); font-size: 18px; font-weight: 600; margin: 0 24px; box-shadow: 0 0 30px rgba(0, 229, 229, 0.15); }
.compare-col h3 { font-size: 18px; color: var(--title-color); font-weight: 600; margin-bottom: 28px; display: flex; align-items: center; gap: 10px; }
.compare-col h3 .dot { width: 8px; height: 8px; border-radius: 50%; }
.compare-col.industry h3 .dot { background: #5A6480; }
.compare-col.platform h3 .dot { background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.bar-row { margin-bottom: 20px; }
.bar-row:last-child { margin-bottom: 0; }
.bar-label { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; color: var(--text-color); }
.bar-label span:last-child { font-family: var(--font-mono); color: var(--title-color); font-weight: 500; }
.bar-track { height: 6px; background: rgba(255, 255, 255, 0.06); border-radius: var(--radius-badge); overflow: hidden; }
.bar-fill { height: 100%; border-radius: var(--radius-badge); background: #3A4258; transition: width 1.5s ease; }
.bar-fill.platform { background: var(--accent); box-shadow: 0 0 12px rgba(0, 229, 229, 0.4); }
.compare-summary { text-align: center; margin-top: 40px; padding: 24px; background: rgba(0, 229, 229, 0.04); border: 1px solid rgba(0, 229, 229, 0.15); border-radius: var(--radius-lg); font-size: 15px; color: var(--text-color); }
.compare-summary strong { color: var(--accent); font-weight: 600; }

/* ========== 资讯卡片 ========== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); box-shadow: var(--shadow-card); }
.news-card:hover { border-color: var(--card-border-hover); transform: translateY(-4px); box-shadow: 0 0 30px rgba(0, 229, 229, 0.1), 0 16px 48px rgba(0, 0, 0, 0.5); }
.news-thumb { position: relative; height: 192px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-badge { position: absolute; top: 12px; left: 12px; background: rgba(0, 229, 229, 0.85); color: #0A0F1F; font-size: 12px; font-weight: 600; padding: 3px 14px; border-radius: var(--radius-badge); z-index: 2; }
.news-body { padding: 20px 24px 24px; }
.news-body h3 { font-size: 17px; color: var(--title-color); font-weight: 600; margin-bottom: 10px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-body .news-excerpt { font-size: 14px; color: var(--muted-color); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; }
.news-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--muted-color); border-top: 1px solid rgba(255, 255, 255, 0.06); padding-top: 16px; }
.news-meta a { color: var(--accent); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: gap var(--transition); }
.news-meta a:hover { gap: 8px; }
.empty-state { grid-column: 1 / -1; text-align: center; padding: 48px 20px; background: rgba(255, 255, 255, 0.03); border: 1px dashed rgba(255, 255, 255, 0.1); border-radius: var(--radius-lg); color: var(--muted-color); font-size: 15px; }

/* ========== FAQ ========== */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { background: var(--card-bg); backdrop-filter: blur(12px); border: 1px solid var(--card-border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; transition: border-color var(--transition); }
.faq-item:hover { border-color: rgba(255, 255, 255, 0.2); }
.faq-item.active { border-color: rgba(0, 229, 229, 0.3); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; font-size: 16px; color: var(--title-color); font-weight: 500; text-align: left; background: none; border: none; gap: 16px; transition: color var(--transition); }
.faq-question:hover { color: var(--accent); }
.faq-icon { width: 28px; height: 28px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.2); display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--accent); transition: transform 0.3s ease, border-color 0.3s ease; flex-shrink: 0; }
.faq-item.active .faq-icon { transform: rotate(135deg); border-color: var(--accent); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 500px; padding: 0 24px 24px; }
.faq-answer p { font-size: 14px; line-height: 1.8; color: var(--text-color); }

/* ========== 转化表单 ========== */
.form-section { position: relative; overflow: hidden; background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px); background-size: 40px 40px; }
.form-section::before { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 600px; height: 300px; background: radial-gradient(ellipse, rgba(0, 229, 229, 0.06), transparent 70%); pointer-events: none; }
.form-card { max-width: 680px; margin: 0 auto; background: var(--card-bg); backdrop-filter: blur(24px) saturate(150%); border: 1px solid var(--card-border); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow-card); position: relative; }
.form-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(0,229,229,0.5), transparent); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--title-color); margin-bottom: 8px; }
.form-control { width: 100%; padding: 14px 16px; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: var(--radius-sm); color: #fff; transition: border-color var(--transition), box-shadow var(--transition); }
.form-control::placeholder { color: rgba(255, 255, 255, 0.4); }
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 229, 229, 0.15); outline: none; }
select.form-control { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237B849C' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; cursor: pointer; }
.form-group select option { background: var(--bg-primary); color: var(--text-color); }
.form-submit { width: 100%; margin-top: 8px; }
.form-tip { text-align: center; font-size: 12px; color: var(--muted-color); margin-top: 16px; }

/* ========== CTA 区块 ========== */
.cta-section { text-align: center; padding: 80px 0; position: relative; }
.cta-section h2 { font-size: 32px; color: var(--title-color); font-weight: 700; margin-bottom: 16px; }
.cta-section p { font-size: 16px; color: var(--text-color); max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ========== 页脚 ========== */
.site-footer { background: #050A18; border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .footer-logo { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 16px; display: inline-block; }
.footer-brand .footer-logo span { color: var(--accent); }
.footer-brand p { font-size: 14px; color: var(--muted-color); line-height: 1.7; max-width: 300px; }
.footer-col h4 { font-size: 15px; color: var(--title-color); font-weight: 600; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 14px; color: var(--muted-color); transition: color var(--transition); }
.footer-col ul a:hover { color: var(--accent); }
.footer-domain { font-family: var(--font-mono); font-size: 13px; color: rgba(255, 255, 255, 0.4); background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.06); padding: 10px 16px; border-radius: 8px; display: inline-block; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 24px 0; text-align: center; font-size: 13px; color: var(--muted-color); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 38px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .service-card:nth-child(2) { transform: none; }
  .service-card:nth-child(3) { transform: none; }
  .service-card:nth-child(2):hover, .service-card:nth-child(3):hover { transform: none; }
  .compare-grid { grid-template-columns: 1fr; gap: 16px; }
  .compare-vs { margin: 0 auto; }
}

@media (max-width: 768px) {
  :root { --space-section: 56px; }
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 60px 0; min-height: auto; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .services-grid { grid-template-columns: 1fr; }
  .service-card { min-height: auto; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 24px 20px; }
  .stat-number { font-size: 32px; }
  .section-head h2 { font-size: 26px; }
  .form-card { padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .topbar-tip { display: none; }
  .topbar-domain, .topbar-entry { font-size: 12px; }
  .nav-cta { display: none; }
}

@media (max-width: 520px) {
  .container { padding: 0 20px; }
  .hero h1 { font-size: 28px; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
}

/* ========== 装饰与工具类 ========== */
.glow-line { width: 1px; height: 80px; background: linear-gradient(to bottom, var(--accent), transparent); margin: 0 auto; }
.text-gradient { background: linear-gradient(90deg, var(--accent), var(--accent-blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mt-56 { margin-top: 56px; }
.text-center { text-align: center; }

/* roulang page: article */
:root {
  --bg-primary: #070D1F;
  --bg-secondary: #0B1230;
  --bg-card: rgba(255,255,255,0.05);
  --border-card: rgba(255,255,255,0.10);
  --accent: #00E5E5;
  --accent-secondary: #2B7FFF;
  --warning: #FFA800;
  --success: #00C48C;
  --text-title: #F0F4FF;
  --text-body: #B6C0D4;
  --text-muted: #7B849C;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-card: 0 0 0 1px rgba(255,255,255,0.05), 0 12px 40px rgba(0,0,0,0.4);
  --shadow-btn: 0 0 20px rgba(0,229,229,0.35), 0 4px 20px rgba(0,229,229,0.2);
  --transition: 0.3s ease;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SF Mono", "Consolas", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-primary);
  background-image:
    radial-gradient(circle at 80% 10%, rgba(0,229,229,0.06), transparent 50%);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #33EBEB; }
img { max-width: 100%; display: block; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, select, textarea { font-family: inherit; outline: none; }

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

/* 顶部信息条 */
.top-info-bar {
  height: 36px;
  background: #050A18;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  font-size: 13px;
}
.top-info-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.top-domain {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.5px;
}
.top-tip {
  color: var(--text-muted);
  text-align: center;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.top-tip strong { color: var(--accent); font-weight: 600; }
.top-entry {
  color: var(--text-body);
  font-size: 13px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.top-entry:hover { color: var(--accent); }

/* 主导航 */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 999;
  height: 72px;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-cn {
  color: var(--text-title);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
}
.logo-cn span { color: var(--accent); }
.logo-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-muted);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-menu .nav-link {
  color: var(--text-body);
  font-size: 16px;
  font-weight: 500;
  padding: 8px 2px;
  position: relative;
  transition: color var(--transition);
}
.nav-menu .nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0,229,229,0.5);
  transition: width var(--transition);
}
.nav-menu .nav-link:hover {
  color: var(--text-title);
}
.nav-menu .nav-link:hover::after,
.nav-menu .nav-link.active::after {
  width: 100%;
}
.nav-menu .nav-link.active {
  color: var(--text-title);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  background: var(--accent);
  color: #0A0F1F;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  box-shadow: var(--shadow-btn);
}
.nav-cta:hover {
  background: #33EBEB;
  color: #0A0F1F;
  transform: translateY(-2px);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-title);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 面包屑 */
.page-breadcrumb {
  padding: 24px 0 8px;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}
.page-breadcrumb a:hover { color: var(--accent); }
.page-breadcrumb .sep { color: rgba(255,255,255,0.2); }
.page-breadcrumb .current {
  color: var(--text-body);
  max-width: 400px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文章主体 */
.article-main {
  padding: 32px 0 80px;
}
.article-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.article-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,229,0.3), transparent);
}
.article-header {
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 32px;
}
.article-header h1 {
  font-size: 36px;
  line-height: 1.3;
  color: var(--text-title);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}
.article-cat {
  display: inline-flex;
  align-items: center;
  background: rgba(0,229,229,0.15);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}
.article-date {
  color: var(--text-muted);
  font-size: 13px;
}

.article-body {
  max-width: 760px;
}
.article-body p {
  margin-bottom: 1.6em;
  line-height: 1.75;
  color: var(--text-body);
}
.article-body h2 {
  font-size: 26px;
  color: var(--text-title);
  margin: 2em 0 0.8em;
  font-weight: 700;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
  line-height: 1.4;
}
.article-body h3 {
  font-size: 20px;
  color: var(--text-title);
  margin: 1.8em 0 0.7em;
  font-weight: 700;
  padding-left: 14px;
  border-left: 3px solid rgba(0,229,229,0.6);
}
.article-body h4 {
  font-size: 18px;
  color: var(--text-title);
  margin: 1.5em 0 0.6em;
  font-weight: 600;
}
.article-body ul {
  margin: 0 0 1.6em;
  padding-left: 1.4em;
}
.article-body ul li {
  margin-bottom: 0.6em;
  position: relative;
  line-height: 1.7;
}
.article-body ul li::marker {
  color: var(--accent);
}
.article-body blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(0,229,229,0.04);
  padding: 16px 20px;
  margin: 1.6em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-body);
  font-style: normal;
}
.article-body img {
  border-radius: var(--radius-md);
  margin: 1.6em 0;
}
.article-body a {
  color: var(--accent);
  border-bottom: 1px solid rgba(0,229,229,0.3);
  padding-bottom: 1px;
}
.article-body a:hover {
  border-bottom-color: var(--accent);
}

.article-notfound {
  text-align: center;
  padding: 80px 20px;
}
.article-notfound p {
  font-size: 20px;
  color: var(--text-body);
  margin-bottom: 24px;
}

/* 分页 */
.article-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 14px;
}
.page-prev, .page-next {
  color: var(--text-muted);
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.page-prev:hover, .page-next:hover {
  color: var(--accent);
}

/* 相关推荐 */
.related-section {
  margin-top: 56px;
}
.related-section h2 {
  font-size: 28px;
  color: var(--text-title);
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.related-section h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(0,229,229,0.2), transparent);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,229,0.35);
  box-shadow: 0 0 0 1px rgba(0,229,229,0.15), 0 12px 40px rgba(0,0,0,0.4);
}
.related-card .card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}
.related-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-card:hover .card-img img {
  transform: scale(1.05);
}
.related-card .card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,229,229,0.15);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.related-card .card-body {
  padding: 20px 22px 24px;
}
.related-card .card-body h3 {
  font-size: 18px;
  color: var(--text-title);
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}

/* 返回按钮 */
.article-back {
  margin-top: 40px;
  display: flex;
  justify-content: center;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.16);
  color: var(--text-title);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* 页脚 */
.site-footer {
  background: #050A18;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 64px 0 0;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-logo {
  display: inline-flex;
  flex-direction: column;
  font-size: 24px;
  font-weight: 800;
  color: var(--text-title);
  margin-bottom: 14px;
}
.footer-logo span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px;
  color: var(--text-title);
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color var(--transition);
}
.footer-col ul li a:hover {
  color: var(--accent);
}
.footer-domain {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  display: inline-block;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .top-tip { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(7,13,31,0.98);
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 40px 32px;
    transition: right 0.35s ease;
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
    z-index: 1000;
    border-left: 1px solid rgba(255,255,255,0.08);
  }
  .nav-menu.open { right: 0; }
  .nav-menu .nav-link {
    font-size: 18px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-cta { display: none; }
  .article-wrap { padding: 32px 24px; }
  .article-header h1 { font-size: 26px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-pagination { flex-direction: column; gap: 12px; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-wrap { padding: 24px 16px; border-radius: var(--radius-md); }
  .article-header h1 { font-size: 22px; }
  .article-body { font-size: 15px; }
  .related-section h2 { font-size: 22px; }
  .top-domain { font-size: 11px; }
  .page-breadcrumb { font-size: 13px; }
  .footer-logo { font-size: 20px; }
}

/* roulang page: category1 */
:root {
            --bg-primary: #070D1F;
            --bg-secondary: #0B1230;
            --bg-deep: #050A18;
            --bg-card: rgba(255, 255, 255, 0.05);
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --accent: #00E5E5;
            --accent-light: #33EBEB;
            --accent-2: #2B7FFF;
            --text-title: #F0F4FF;
            --text-body: #B6C0D4;
            --text-muted: #7B849C;
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 12px 40px rgba(0, 0, 0, 0.4);
            --shadow-btn: 0 4px 24px rgba(0, 0, 0, 0.35);
            --glow: 0 0 20px rgba(0, 229, 229, 0.35), 0 4px 20px rgba(0, 229, 229, 0.2);
            --mono: 'JetBrains Mono', 'Roboto Mono', 'SF Mono', Consolas, monospace;
            --spacing-section: 96px;
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-primary);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease, border-color 0.3s ease, background-color 0.3s ease, opacity 0.3s ease;
        }

        ul,
        ol {
            list-style: none;
        }

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

        img::selection {
            background: transparent;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* 顶部信息条 */
        .top-bar {
            height: 36px;
            background: var(--bg-deep);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
        }

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

        .domain-tag {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.4px;
            white-space: nowrap;
        }

        .top-tip {
            font-size: 13px;
            color: rgba(182, 192, 212, 0.75);
            text-align: center;
            flex: 1;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .top-entry {
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            white-space: nowrap;
            transition: color 0.3s ease;
        }

        .top-entry:hover {
            color: var(--accent-light);
        }

        /* 主导航 */
        .main-nav {
            height: 72px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.4s ease;
        }

        .main-nav.scrolled {
            background: rgba(7, 13, 31, 0.85);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }

        .main-nav .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .nav-logo {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
            flex-shrink: 0;
        }

        .logo-cn {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .logo-cn span {
            color: var(--accent);
        }

        .logo-en {
            font-family: var(--mono);
            font-size: 10px;
            letter-spacing: 2px;
            color: var(--text-muted);
            margin-top: 2px;
        }

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

        .nav-link {
            position: relative;
            font-size: 16px;
            color: var(--text-body);
            padding: 26px 0 22px;
            transition: color 0.3s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
            box-shadow: 0 0 10px rgba(0, 229, 229, 0.5);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #fff;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #0A0F1F;
            font-size: 14px;
            font-weight: 700;
            padding: 9px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-btn);
            transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.15s ease;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background: var(--accent-light);
            box-shadow: var(--glow);
            color: #0A0F1F;
        }

        .nav-cta:active {
            transform: translateY(1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            padding: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

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

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

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

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

        /* 移动端抽屉 */
        .mobile-menu {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            background: rgba(7, 13, 31, 0.98);
            border-left: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 200;
            transform: translateX(100%);
            transition: transform 0.4s ease;
            padding: 90px 32px 32px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-link {
            font-size: 16px;
            color: var(--text-body);
            padding: 13px 8px;
            border-radius: 10px;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .mobile-link:hover,
        .mobile-link.active {
            color: var(--accent);
            background: rgba(0, 229, 229, 0.06);
        }

        .mobile-cta {
            margin-top: 12px;
            text-align: center;
            background: var(--accent);
            color: #0A0F1F;
            font-weight: 700;
            border-radius: 12px;
        }

        .mobile-cta:hover {
            color: #0A0F1F;
            background: var(--accent-light);
        }

        .menu-mask {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 180;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .menu-mask.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* 通用按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            border: 1px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: #0A0F1F;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            box-shadow: var(--glow);
            color: #0A0F1F;
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.16);
            color: var(--text-title);
            backdrop-filter: blur(10px);
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        /* 页面 Hero */
        .page-hero {
            position: relative;
            min-height: 280px;
            display: flex;
            align-items: center;
            background-color: var(--bg-primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 30%, rgba(0, 229, 229, 0.10), transparent 60%),
                linear-gradient(180deg, rgba(7, 13, 31, 0.6), rgba(7, 13, 31, 0.92));
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .hero-eyebrow {
            font-family: var(--mono);
            font-size: 12px;
            letter-spacing: 3px;
            color: var(--accent);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .page-hero h1 {
            font-size: 40px;
            color: var(--text-title);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

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

        .hero-sub {
            max-width: 720px;
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 28px;
        }

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

        /* 板块通用 */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

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

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

        .section-tag {
            display: inline-flex;
            font-family: var(--mono);
            font-size: 12px;
            letter-spacing: 2px;
            color: var(--accent);
            background: rgba(0, 229, 229, 0.08);
            border: 1px solid rgba(0, 229, 229, 0.14);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 32px;
            color: var(--text-title);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* 平台概述 */
        .overview-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 64px;
            align-items: center;
        }

        .overview-content h3 {
            font-size: 22px;
            color: var(--text-title);
            margin-bottom: 16px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            border-radius: 2px;
        }

        .overview-content p {
            margin-bottom: 18px;
            line-height: 1.85;
        }

        .check-list {
            margin-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .check-list li {
            position: relative;
            padding-left: 26px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.6;
        }

        .check-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: rgba(0, 229, 229, 0.14);
            border: 1px solid rgba(0, 229, 229, 0.3);
        }

        .check-list li::after {
            content: "";
            position: absolute;
            left: 5px;
            top: 10px;
            width: 6px;
            height: 3px;
            border-left: 1.5px solid var(--accent);
            border-bottom: 1.5px solid var(--accent);
            transform: rotate(-45deg);
        }

        .overview-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

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

        .overview-media::after {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }

        /* 服务能力纵向堆叠 */
        .capability-stack {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .capability-item {
            display: grid;
            grid-template-columns: 72px 64px 1fr;
            gap: 24px;
            align-items: flex-start;
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 32px;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .capability-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 229, 0.25), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .capability-item:hover {
            border-color: rgba(0, 229, 229, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .capability-item:hover::before {
            opacity: 1;
        }

        .capability-num {
            font-family: var(--mono);
            font-size: 14px;
            color: var(--text-muted);
            letter-spacing: 1px;
            padding-top: 8px;
        }

        .capability-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(0, 229, 229, 0.08);
            border: 1px solid rgba(0, 229, 229, 0.14);
            color: var(--accent);
        }

        .capability-icon svg {
            width: 24px;
            height: 24px;
        }

        .capability-body h3 {
            font-size: 20px;
            color: var(--text-title);
            margin-bottom: 8px;
            font-weight: 600;
        }

        .capability-body p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            max-width: 680px;
        }

        /* 数据指标 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .stat-card:hover {
            border-color: rgba(0, 229, 229, 0.3);
            transform: translateY(-4px);
        }

        .stat-number {
            font-family: var(--mono);
            font-size: 38px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .stat-label {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 6px;
        }

        .stat-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 使用流程 */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .process-step {
            position: relative;
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .process-step:hover {
            border-color: rgba(0, 229, 229, 0.3);
            transform: translateY(-4px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            font-family: var(--mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(0, 229, 229, 0.08);
            border: 1px solid rgba(0, 229, 229, 0.14);
            margin-bottom: 18px;
        }

        .process-step h3 {
            font-size: 17px;
            color: var(--text-title);
            margin-bottom: 8px;
            font-weight: 600;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* FAQ 手风琴 */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 229, 0.2);
        }

        .faq-item.open {
            border-color: rgba(0, 229, 229, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            text-align: left;
            transition: color 0.3s ease;
        }

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

        .faq-icon {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.16);
            font-size: 18px;
            line-height: 1;
            color: var(--text-body);
            transition: transform 0.35s ease, border-color 0.35s ease, color 0.35s ease;
        }

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

        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-body);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
        }

        .faq-item.open .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* CTA 区块 */
        .cta-section {
            padding: 64px 0 var(--spacing-section);
        }

        .cta-card {
            position: relative;
            overflow: hidden;
            text-align: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 50% 0%, rgba(0, 229, 229, 0.12), transparent 60%);
            pointer-events: none;
        }

        .cta-card h2 {
            position: relative;
            font-size: 30px;
            color: var(--text-title);
            font-weight: 700;
            margin-bottom: 14px;
        }

        .cta-card p {
            position: relative;
            max-width: 640px;
            margin: 0 auto 32px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
        }

        .cta-card .btn {
            position: relative;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr;
            gap: 40px;
            margin-bottom: 44px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            margin-bottom: 12px;
        }

        .footer-logo span {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 300px;
        }

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

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.3s ease;
        }

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

        .footer-domain {
            display: inline-block;
            font-family: var(--mono);
            font-size: 13px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 6px 14px;
            border-radius: 8px;
            letter-spacing: 0.4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
            }

            .container {
                padding: 0 20px;
            }

            .main-nav {
                height: 64px;
            }

            .nav-menu,
            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                min-height: 340px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .capability-item {
                grid-template-columns: 1fr;
                gap: 14px;
                padding: 24px;
            }

            .capability-num {
                padding-top: 0;
            }

            .capability-icon {
                width: 44px;
                height: 44px;
                border-radius: 12px;
            }

            .capability-icon svg {
                width: 20px;
                height: 20px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .stat-card {
                padding: 20px;
            }

            .stat-number {
                font-size: 30px;
            }

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

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

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

            .top-tip {
                display: none;
            }

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

            .faq-question {
                font-size: 15px;
                padding: 18px 16px;
            }

            .faq-answer {
                padding: 14px 16px 18px;
            }

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

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

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 28px;
            }

            .section-head h2 {
                font-size: 22px;
            }

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

            .overview-media img {
                min-height: 220px;
            }

            .btn {
                padding: 13px 24px;
                font-size: 14px;
            }
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: category2 */
:root {
        --bg-primary: #070D1F;
        --bg-secondary: #0B1230;
        --bg-deep: #050A18;
        --card-bg: rgba(255, 255, 255, 0.05);
        --card-bg-hover: rgba(255, 255, 255, 0.08);
        --border-color: rgba(255, 255, 255, 0.10);
        --border-light: rgba(255, 255, 255, 0.16);
        --accent: #00E5E5;
        --accent-hover: #33EBEB;
        --accent-dark: #0A0F1F;
        --accent-secondary: #2B7FFF;
        --warning: #FFA800;
        --success: #00C48C;
        --text-title: #F0F4FF;
        --text-body: #B6C0D4;
        --text-muted: #7B849C;
        --radius-lg: 20px;
        --radius-md: 16px;
        --radius-sm: 12px;
        --radius-badge: 999px;
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
        --shadow-card-hover: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 12px 40px rgba(0, 0, 0, 0.4);
        --shadow-glow: 0 0 20px rgba(0, 229, 229, 0.35), 0 4px 20px rgba(0, 229, 229, 0.2);
        --space-section: 96px;
        --space-section-mobile: 56px;
        --container-max: 1200px;
        --header-h: 72px;
        --topbar-h: 36px;
        --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        scroll-padding-top: calc(var(--header-h) + var(--topbar-h) + 20px);
    }
    body {
        font-family: var(--font-body);
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-body);
        background: var(--bg-primary);
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    body.nav-open {
        overflow: hidden;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color 0.25s ease;
    }
    img {
        max-width: 100%;
        display: block;
        object-fit: cover;
    }
    button,
    input,
    select,
    textarea {
        font-family: var(--font-body);
        font-size: 16px;
        border: none;
        outline: none;
        background: none;
        color: var(--text-title);
    }
    ul,
    ol {
        list-style: none;
    }
    .container {
        width: 100%;
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
    }
    section {
        position: relative;
    }

    /* ===== Top Bar ===== */
    .topbar {
        height: var(--topbar-h);
        background: var(--bg-deep);
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        font-size: 13px;
        color: var(--text-muted);
        display: flex;
        align-items: center;
    }
    .topbar .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
    }
    .topbar-domain {
        font-family: var(--font-mono);
        font-size: 12px;
        letter-spacing: 0.5px;
        color: var(--text-muted);
        white-space: nowrap;
    }
    .topbar-tip {
        flex: 1;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.35);
    }
    .topbar-tip b {
        color: var(--text-muted);
        font-weight: 500;
    }
    .topbar-entry {
        color: var(--accent);
        font-size: 13px;
        white-space: nowrap;
        transition: opacity 0.25s;
    }
    .topbar-entry:hover {
        opacity: 0.8;
    }

    /* ===== Header / Nav ===== */
    .main-nav {
        position: sticky;
        top: 0;
        z-index: 100;
        height: var(--header-h);
        background: rgba(7, 13, 31, 0.72);
        backdrop-filter: blur(20px) saturate(150%);
        -webkit-backdrop-filter: blur(20px) saturate(150%);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        transition: background 0.35s ease, box-shadow 0.35s ease;
    }
    .main-nav.scrolled {
        background: rgba(7, 13, 31, 0.85);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }
    .main-nav .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        gap: 24px;
    }
    .nav-logo {
        display: flex;
        flex-direction: column;
        line-height: 1.2;
        flex-shrink: 0;
    }
    .logo-cn {
        font-size: 21px;
        font-weight: 800;
        color: var(--text-title);
        letter-spacing: 0.5px;
    }
    .logo-cn span {
        color: var(--accent);
    }
    .logo-en {
        font-family: var(--font-mono);
        font-size: 10px;
        letter-spacing: 2.5px;
        color: var(--text-muted);
        text-transform: uppercase;
        margin-top: 2px;
    }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-link {
        font-size: 16px;
        color: var(--text-body);
        position: relative;
        padding: 8px 0;
        transition: color 0.25s;
        white-space: nowrap;
    }
    .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;
        background: var(--accent);
        box-shadow: 0 0 10px rgba(0, 229, 229, 0.6);
        opacity: 0;
        transform: scaleX(0);
        transition: opacity 0.3s, transform 0.3s;
    }
    .nav-link:hover {
        color: var(--text-title);
    }
    .nav-link:hover::after {
        opacity: 1;
        transform: scaleX(1);
    }
    .nav-link.active {
        color: var(--text-title);
    }
    .nav-link.active::after {
        opacity: 1;
        transform: scaleX(1);
    }
    .nav-cta {
        background: var(--accent);
        color: var(--accent-dark);
        font-weight: 700;
        font-size: 14px;
        padding: 10px 24px;
        border-radius: var(--radius-sm);
        box-shadow: 0 0 0 rgba(0, 229, 229, 0);
        transition: background 0.3s, box-shadow 0.3s, transform 0.15s;
        white-space: nowrap;
    }
    .nav-cta:hover {
        background: var(--accent-hover);
        box-shadow: var(--shadow-glow);
    }
    .nav-cta:active {
        transform: translateY(1px);
    }
    .nav-toggle {
        display: none;
        width: 42px;
        height: 42px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        border-radius: 8px;
        cursor: pointer;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border-color);
        transition: background 0.25s, border-color 0.25s;
    }
    .nav-toggle:hover {
        background: rgba(255, 255, 255, 0.10);
        border-color: rgba(0, 229, 229, 0.4);
    }
    .nav-toggle span {
        width: 18px;
        height: 2px;
        background: var(--text-title);
        border-radius: 2px;
        transition: transform 0.3s, opacity 0.3s;
    }
    .nav-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== Mobile Menu Drawer ===== */
    .mobile-drawer {
        position: fixed;
        top: 0;
        right: 0;
        width: 300px;
        height: 100vh;
        background: rgba(7, 13, 31, 0.98);
        backdrop-filter: blur(24px);
        z-index: 200;
        padding: 100px 32px 40px;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        display: flex;
        flex-direction: column;
        gap: 6px;
        box-shadow: -12px 0 40px rgba(0, 0, 0, 0.5);
        border-left: 1px solid rgba(255, 255, 255, 0.06);
    }
    .mobile-drawer.open {
        transform: translateX(0);
    }
    .mobile-drawer .drawer-link {
        font-size: 18px;
        padding: 14px 16px;
        border-radius: 12px;
        color: var(--text-body);
        transition: background 0.25s, color 0.25s;
    }
    .mobile-drawer .drawer-link:hover,
    .mobile-drawer .drawer-link.active {
        background: rgba(0, 229, 229, 0.10);
        color: var(--accent);
    }
    .drawer-cta {
        margin-top: 20px;
        text-align: center;
        background: var(--accent);
        color: var(--accent-dark);
        font-weight: 700;
        padding: 14px 24px;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        transition: transform 0.2s, background 0.25s;
    }
    .drawer-cta:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
    }
    .drawer-mask {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(2px);
        z-index: 150;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.35s, visibility 0.35s;
    }
    .drawer-mask.show {
        opacity: 1;
        visibility: visible;
    }

    /* ===== Page Hero ===== */
    .page-hero {
        min-height: 280px;
        display: flex;
        align-items: center;
        background: linear-gradient(180deg, rgba(7, 13, 31, 0.85) 0%, var(--bg-primary) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
        background-color: var(--bg-primary);
        position: relative;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        padding: 60px 0 40px;
    }
    .page-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        background-size: 40px 40px;
        pointer-events: none;
    }
    .page-hero::after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at 30% 20%, rgba(0, 229, 229, 0.10), transparent 60%);
        pointer-events: none;
    }
    .page-hero .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .page-hero h1 {
        font-size: 36px;
        font-weight: 800;
        color: var(--text-title);
        letter-spacing: 1px;
        line-height: 1.3;
        margin-bottom: 16px;
    }
    .page-hero h1 span {
        color: var(--accent);
    }
    .page-hero .hero-sub {
        font-size: 16px;
        color: var(--text-body);
        max-width: 640px;
        margin: 0 auto;
        line-height: 1.8;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(0, 229, 229, 0.10);
        border: 1px solid rgba(0, 229, 229, 0.20);
        color: var(--accent);
        font-size: 13px;
        font-weight: 500;
        padding: 6px 18px;
        border-radius: var(--radius-badge);
        margin-bottom: 20px;
        letter-spacing: 0.5px;
    }
    .hero-badge::before {
        content: "";
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 8px rgba(0, 229, 229, 0.8);
    }

    /* ===== Section Generic ===== */
    .section {
        padding: var(--space-section) 0;
    }
    .section-alt {
        background: var(--bg-secondary);
    }
    .section-head {
        text-align: center;
        margin-bottom: 56px;
        position: relative;
        z-index: 2;
    }
    .section-head .eyebrow {
        display: inline-block;
        font-family: var(--font-mono);
        font-size: 12px;
        letter-spacing: 3px;
        color: var(--accent);
        text-transform: uppercase;
        margin-bottom: 12px;
        background: rgba(0, 229, 229, 0.08);
        padding: 6px 16px;
        border-radius: var(--radius-badge);
        border: 1px solid rgba(0, 229, 229, 0.15);
    }
    .section-head h2 {
        font-size: 32px;
        font-weight: 800;
        color: var(--text-title);
        line-height: 1.3;
        letter-spacing: 0.5px;
    }
    .section-head .sub {
        font-size: 15px;
        color: var(--text-muted);
        max-width: 560px;
        margin: 12px auto 0;
        line-height: 1.7;
    }

    /* ===== Solution Table List ===== */
    .solution-list {
        display: flex;
        flex-direction: column;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-light);
        background: var(--card-bg);
        backdrop-filter: blur(20px) saturate(150%);
        box-shadow: var(--shadow-card);
    }
    .solution-row {
        display: grid;
        grid-template-columns: 200px 1fr 200px;
        gap: 28px;
        align-items: center;
        padding: 28px 32px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        transition: background 0.3s;
    }
    .solution-row:last-child {
        border-bottom: none;
    }
    .solution-row:hover {
        background: var(--card-bg-hover);
    }
    .solution-row .row-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-title);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .solution-row .row-title .row-index {
        font-family: var(--font-mono);
        font-size: 13px;
        color: var(--accent);
        background: rgba(0, 229, 229, 0.12);
        border-radius: 8px;
        padding: 3px 10px;
        flex-shrink: 0;
    }
    .solution-row .row-desc {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-body);
    }
    .solution-row .row-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        justify-content: flex-end;
    }
    .solution-tag {
        display: inline-flex;
        font-size: 12px;
        padding: 5px 14px;
        border-radius: var(--radius-badge);
        background: rgba(0, 229, 229, 0.12);
        color: var(--accent);
        border: 1px solid rgba(0, 229, 229, 0.18);
        font-weight: 500;
        white-space: nowrap;
    }
    .solution-tag.warn {
        background: rgba(255, 168, 0, 0.12);
        color: var(--warning);
        border-color: rgba(255, 168, 0, 0.20);
    }
    .solution-tag.blue {
        background: rgba(43, 127, 255, 0.12);
        color: #7FAEFF;
        border-color: rgba(43, 127, 255, 0.20);
    }

    /* ===== Capability Grid ===== */
    .capability-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .capability-card {
        background: var(--card-bg);
        backdrop-filter: blur(20px) saturate(150%);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 28px;
        display: flex;
        gap: 20px;
        transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
        box-shadow: var(--shadow-card);
    }
    .capability-card:hover {
        border-color: rgba(0, 229, 229, 0.35);
        transform: translateY(-4px);
        box-shadow: var(--shadow-card-hover);
    }
    .capability-card .cap-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        border-radius: 14px;
        background: rgba(0, 229, 229, 0.10);
        border: 1px solid rgba(0, 229, 229, 0.20);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--accent);
    }
    .capability-card .cap-body {
        flex: 1;
    }
    .capability-card h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 8px;
    }
    .capability-card p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-body);
        margin-bottom: 12px;
    }
    .capability-card .cap-link {
        font-size: 14px;
        color: var(--accent);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap 0.25s;
        font-weight: 500;
    }
    .capability-card .cap-link:hover {
        gap: 10px;
    }

    /* ===== Process Steps ===== */
    .process-wrap {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .process-step {
        text-align: center;
        padding: 32px 20px;
        background: var(--card-bg);
        backdrop-filter: blur(20px) saturate(150%);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        position: relative;
        transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    }
    .process-step:hover {
        border-color: rgba(0, 229, 229, 0.35);
        transform: translateY(-4px);
        box-shadow: var(--shadow-card-hover);
    }
    .process-step .step-num {
        font-family: var(--font-mono);
        font-size: 38px;
        font-weight: 700;
        color: rgba(0, 229, 229, 0.35);
        line-height: 1;
        margin-bottom: 14px;
    }
    .process-step h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 10px;
    }
    .process-step p {
        font-size: 13px;
        line-height: 1.7;
        color: var(--text-muted);
    }
    .process-step::after {
        content: "→";
        position: absolute;
        right: -16px;
        top: 42%;
        color: rgba(0, 229, 229, 0.5);
        font-size: 20px;
        z-index: 2;
    }
    .process-step:last-child::after {
        display: none;
    }

    /* ===== Comparison Section ===== */
    .comparison-wrap {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        gap: 20px;
        align-items: stretch;
    }
    .cmp-card {
        background: var(--card-bg);
        backdrop-filter: blur(20px) saturate(150%);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 28px;
        box-shadow: var(--shadow-card);
    }
    .cmp-card h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 6px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .cmp-card .cmp-label {
        font-size: 12px;
        color: var(--text-muted);
        margin-bottom: 20px;
    }
    .cmp-bar-row {
        margin-bottom: 18px;
    }
    .cmp-bar-row .bar-label {
        font-size: 13px;
        color: var(--text-body);
        margin-bottom: 6px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .cmp-bar-row .bar-label .bar-value {
        font-family: var(--font-mono);
        font-size: 14px;
        color: var(--text-title);
    }
    .cmp-bar-track {
        height: 8px;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.06);
        overflow: hidden;
    }
    .cmp-bar-fill {
        height: 100%;
        border-radius: 999px;
        transition: width 1s ease;
    }
    .cmp-bar-fill.gray {
        background: rgba(255, 255, 255, 0.25);
    }
    .cmp-bar-fill.accent {
        background: var(--accent);
        box-shadow: 0 0 12px rgba(0, 229, 229, 0.5);
    }
    .cmp-divider {
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 26px;
        color: var(--accent);
        position: relative;
    }
    .cmp-divider::before {
        content: "";
        position: absolute;
        width: 2px;
        height: 60%;
        background: linear-gradient(180deg, transparent, var(--accent), transparent);
        opacity: 0.5;
    }
    .cmp-divider i {
        background: var(--bg-primary);
        padding: 8px;
        border-radius: 50%;
        border: 1px solid rgba(0, 229, 229, 0.3);
        z-index: 1;
        font-style: normal;
        font-family: var(--font-mono);
        font-size: 16px;
        color: var(--accent);
    }

    /* ===== FAQ ===== */
    .faq-wrap {
        max-width: 860px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 0;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-color);
        background: var(--card-bg);
        backdrop-filter: blur(20px) saturate(150%);
        box-shadow: var(--shadow-card);
    }
    .faq-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    }
    .faq-item:last-child {
        border-bottom: none;
    }
    .faq-q {
        width: 100%;
        text-align: left;
        padding: 20px 28px;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-title);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        transition: background 0.3s;
    }
    .faq-q:hover {
        background: rgba(255, 255, 255, 0.03);
    }
    .faq-q .faq-icon {
        width: 28px;
        height: 28px;
        flex-shrink: 0;
        border-radius: 50%;
        background: rgba(0, 229, 229, 0.12);
        border: 1px solid rgba(0, 229, 229, 0.20);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        color: var(--accent);
        transition: transform 0.35s ease;
        font-weight: 400;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 28px;
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-body);
        border-top: 0 solid rgba(255, 255, 255, 0.05);
    }
    .faq-item.open .faq-a {
        max-height: 300px;
        padding: 0 28px 20px;
        border-top-width: 1px;
    }

    /* ===== CTA Block ===== */
    .cta-block {
        padding: 80px 0;
        position: relative;
        background: var(--bg-secondary);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .cta-block::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        background-size: 40px 40px;
        pointer-events: none;
    }
    .cta-block::after {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 600px;
        height: 100%;
        background: radial-gradient(circle at center, rgba(0, 229, 229, 0.08), transparent 70%);
        pointer-events: none;
    }
    .cta-inner {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .cta-inner h2 {
        font-size: 28px;
        font-weight: 800;
        color: var(--text-title);
        margin-bottom: 12px;
        letter-spacing: 0.5px;
    }
    .cta-inner p {
        font-size: 15px;
        color: var(--text-muted);
        max-width: 480px;
        margin: 0 auto 32px;
        line-height: 1.7;
    }
    .cta-btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        background: var(--accent);
        color: var(--accent-dark);
        font-size: 15px;
        font-weight: 700;
        padding: 14px 36px;
        border-radius: var(--radius-sm);
        box-shadow: 0 0 0 rgba(0, 229, 229, 0);
        transition: background 0.3s, box-shadow 0.3s, transform 0.15s;
    }
    .cta-btn:hover {
        background: var(--accent-hover);
        box-shadow: var(--shadow-glow);
        transform: translateY(-2px);
    }
    .cta-btn:active {
        transform: translateY(0);
    }
    .cta-btn i {
        font-style: normal;
        transition: transform 0.3s;
    }
    .cta-btn:hover i {
        transform: translateX(4px);
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-deep);
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        padding: 60px 0 0;
        color: var(--text-body);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
    }
    .footer-brand .footer-logo {
        font-size: 22px;
        font-weight: 800;
        color: var(--text-title);
        display: inline-block;
        margin-bottom: 14px;
    }
    .footer-brand .footer-logo span {
        color: var(--accent);
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
        max-width: 280px;
    }
    .footer-col h4 {
        font-size: 14px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .footer-col ul {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-col ul li a {
        font-size: 14px;
        color: var(--text-muted);
        transition: color 0.25s;
    }
    .footer-col ul li a:hover {
        color: var(--accent);
    }
    .footer-domain {
        font-family: var(--font-mono);
        font-size: 14px;
        color: var(--text-muted);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.06);
        padding: 6px 14px;
        border-radius: 8px;
        display: inline-block;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        padding: 20px 0;
        text-align: center;
    }
    .footer-bottom p {
        font-size: 13px;
        color: var(--text-muted);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        :root {
            --space-section: 72px;
        }
        .solution-row {
            grid-template-columns: 160px 1fr;
            gap: 16px 20px;
        }
        .solution-row .row-meta {
            grid-column: 2;
            justify-content: flex-start;
        }
        .process-wrap {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .process-step::after {
            display: none;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .comparison-wrap {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .cmp-divider {
            display: none;
        }
    }
    @media (max-width: 768px) {
        .topbar-tip {
            display: none;
        }
        .nav-menu {
            display: none;
        }
        .nav-cta {
            display: none;
        }
        .nav-toggle {
            display: flex;
        }
        .page-hero {
            min-height: 220px;
            padding: 44px 0 32px;
        }
        .page-hero h1 {
            font-size: 28px;
        }
        .section {
            --space-section: var(--space-section-mobile);
        }
        .section-head h2 {
            font-size: 26px;
        }
        .solution-list {
            border-radius: var(--radius-md);
        }
        .solution-row {
            grid-template-columns: 1fr;
            padding: 22px 20px;
            gap: 10px;
        }
        .solution-row .row-meta {
            grid-column: auto;
            justify-content: flex-start;
        }
        .capability-grid {
            grid-template-columns: 1fr;
        }
        .process-wrap {
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .process-step {
            padding: 24px 14px;
        }
        .process-step .step-num {
            font-size: 30px;
        }
        .faq-q {
            padding: 18px 20px;
            font-size: 15px;
        }
        .faq-a {
            padding: 0 20px;
        }
        .faq-item.open .faq-a {
            padding: 0 20px 18px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom p {
            font-size: 12px;
        }
    }
    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .topbar-domain {
            font-size: 11px;
        }
        .topbar-entry {
            font-size: 12px;
        }
        .logo-cn {
            font-size: 18px;
        }
        .logo-en {
            font-size: 9px;
            letter-spacing: 1.5px;
        }
        .page-hero h1 {
            font-size: 24px;
        }
        .page-hero .hero-sub {
            font-size: 14px;
        }
        .process-wrap {
            grid-template-columns: 1fr;
        }
        .capability-card {
            flex-direction: column;
            padding: 22px;
        }
        .solution-row {
            padding: 18px 16px;
        }
        .cta-inner h2 {
            font-size: 22px;
        }
        .cta-btn {
            width: 100%;
            justify-content: center;
        }
        .faq-q {
            padding: 16px;
        }
        .faq-a {
            padding: 0 16px;
        }
        .faq-item.open .faq-a {
            padding: 0 16px 16px;
        }
    }