/* roulang page: index */
:root {
  --color-primary: #4A6CF7;
  --color-primary-dark: #3B5CE0;
  --color-secondary: #14B8A6;
  --color-accent: #F59E0B;
  --color-dark: #1E293B;
  --color-bg: #F8FAFC;
  --color-card: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #1E293B;
  --color-text-weak: #64748B;
  --color-text-light: #94A3B8;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.12);
  --shadow-hover: 0 18px 36px rgba(0,0,0,0.15);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-family); background: var(--color-bg); color: var(--color-text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
button { cursor: pointer; background: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { font-size: 2rem; font-weight: 700; color: var(--color-dark); margin-bottom: 12px; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.05rem; color: var(--color-text-weak); max-width: 640px; margin-bottom: 48px; line-height: 1.7; }

/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--header-height); background: rgba(255,255,255,0.96); backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-border); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--color-dark); }
.logo-icon { width: 34px; height: 34px; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1rem; font-weight: 800; letter-spacing: -0.5px; }
.logo span { color: var(--color-dark); }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a { font-size: 0.93rem; font-weight: 500; color: var(--color-text-weak); padding: 6px 0; border-bottom: 2px solid transparent; transition: var(--transition); }
.nav a:hover, .nav a.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.nav a.active { color: var(--color-primary); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-box { display: flex; align-items: center; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0 12px; height: 38px; width: 200px; transition: var(--transition); }
.search-box:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(74,108,247,0.12); }
.search-box svg { width: 16px; height: 16px; color: var(--color-text-light); flex-shrink: 0; }
.search-box input { background: none; border: none; padding: 0 8px; height: 100%; width: 100%; font-size: 0.85rem; color: var(--color-text); }
.search-box input::placeholder { color: var(--color-text-light); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 22px; border-radius: var(--radius-md); font-weight: 600; font-size: 0.92rem; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 2px 8px rgba(74,108,247,0.25); }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(74,108,247,0.35); }
.btn-outline { background: transparent; color: var(--color-text-weak); border: 1.5px solid var(--color-border); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(74,108,247,0.04); }
.btn-accent { background: var(--color-accent); color: #1E293B; box-shadow: 0 2px 8px rgba(245,158,11,0.3); }
.btn-accent:hover { background: #E68A00; color: #1E293B; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(245,158,11,0.4); }
.btn-download { background: var(--color-primary); color: #fff; padding: 12px 30px; font-size: 1rem; border-radius: var(--radius-md); box-shadow: 0 4px 14px rgba(74,108,247,0.3); }
.btn-download:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(74,108,247,0.4); }
.btn-download svg { width: 18px; height: 18px; }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.3); padding: 10px 22px; border-radius: var(--radius-md); font-weight: 500; }
.btn-ghost:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,0.08); }

/* Hamburger */
.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 28px; height: 28px; cursor: pointer; }
.hamburger span { display: block; height: 2.5px; background: var(--color-dark); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Hero */
.hero { padding: 120px 0 80px; background: linear-gradient(135deg, #0F172A 0%, #1E293B 40%, #2D3A5E 100%); position: relative; overflow: hidden; min-height: 80vh; display: flex; align-items: center; }
.hero::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.12; pointer-events: none; }
.hero::after { content: ''; position: absolute; top: -30%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(74,108,247,0.15) 0%, transparent 70%); pointer-events: none; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 2; }
.hero-content { }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(74,108,247,0.15); border: 1px solid rgba(74,108,247,0.25); border-radius: 40px; padding: 6px 16px; font-size: 0.8rem; color: rgba(255,255,255,0.8); margin-bottom: 20px; backdrop-filter: blur(4px); }
.hero-badge svg { width: 14px; height: 14px; color: var(--color-accent); }
.hero h1 { font-size: 3rem; font-weight: 800; color: #fff; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 20px; }
.hero h1 span { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.1rem; color: rgba(255,255,255,0.7); max-width: 520px; line-height: 1.7; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-download { font-size: 1.05rem; padding: 14px 34px; }
.hero-image { display: flex; justify-content: center; align-items: center; }
.hero-image img { width: 100%; max-width: 520px; border-radius: var(--radius-lg); box-shadow: 0 20px 60px rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.08); }
.hero-stats { display: flex; gap: 32px; margin-top: 36px; }
.hero-stats-item { text-align: center; }
.hero-stats-item .num { font-size: 1.6rem; font-weight: 700; color: #fff; }
.hero-stats-item .label { font-size: 0.8rem; color: rgba(255,255,255,0.55); margin-top: 2px; }

/* Features */
.features { background: var(--color-card); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { padding: 32px 28px; border-radius: var(--radius-lg); background: var(--color-bg); border: 1px solid var(--color-border); transition: var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(74,108,247,0.2); }
.feature-card .icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: linear-gradient(135deg, rgba(74,108,247,0.1), rgba(20,184,166,0.08)); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.feature-card .icon svg { width: 24px; height: 24px; color: var(--color-primary); }
.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; color: var(--color-dark); }
.feature-card p { font-size: 0.92rem; color: var(--color-text-weak); line-height: 1.6; }

/* Screenshot Carousel */
.screenshot-section { background: var(--color-bg); overflow: hidden; }
.carousel-wrap { position: relative; max-width: 900px; margin: 0 auto; }
.carousel-main { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); background: #0F172A; aspect-ratio: 16/10; position: relative; }
.carousel-main img { width: 100%; height: 100%; object-fit: cover; transition: opacity 0.5s ease; }
.carousel-nav { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }
.carousel-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-border); border: none; cursor: pointer; transition: var(--transition); padding: 0; }
.carousel-dot.active { background: var(--color-primary); width: 28px; border-radius: 6px; }
.carousel-caption { text-align: center; margin-top: 16px; font-size: 0.95rem; color: var(--color-text-weak); }
.carousel-caption strong { color: var(--color-dark); font-weight: 600; }
.carousel-btn { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.9); backdrop-filter: blur(4px); border: none; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: var(--shadow-md); transition: var(--transition); z-index: 5; }
.carousel-btn:hover { background: #fff; box-shadow: var(--shadow-lg); }
.carousel-btn.prev { left: 16px; }
.carousel-btn.next { right: 16px; }
.carousel-btn svg { width: 20px; height: 20px; color: var(--color-dark); }

/* System Requirements */
.sysreq { background: var(--color-card); }
.sysreq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sysreq-card { padding: 28px 24px; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: var(--color-bg); transition: var(--transition); }
.sysreq-card:hover { border-color: rgba(74,108,247,0.2); box-shadow: var(--shadow-md); }
.sysreq-card .os-icon { width: 40px; height: 40px; border-radius: var(--radius-sm); background: linear-gradient(135deg, rgba(74,108,247,0.1), rgba(20,184,166,0.06)); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.sysreq-card .os-icon svg { width: 22px; height: 22px; color: var(--color-primary); }
.sysreq-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 10px; }
.sysreq-card .tag { display: inline-block; padding: 2px 10px; border-radius: 40px; font-size: 0.72rem; font-weight: 600; margin-bottom: 10px; }
.sysreq-card .tag.min { background: rgba(20,184,166,0.12); color: var(--color-secondary); }
.sysreq-card .tag.rec { background: rgba(245,158,11,0.15); color: #B45309; }
.sysreq-card ul { margin-top: 8px; }
.sysreq-card ul li { font-size: 0.88rem; color: var(--color-text-weak); padding: 4px 0; position: relative; padding-left: 18px; }
.sysreq-card ul li::before { content: ''; position: absolute; left: 0; top: 12px; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); opacity: 0.4; }

/* News / CMS */
.news-section { background: var(--color-bg); }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-card { display: flex; align-items: flex-start; gap: 20px; padding: 22px 26px; background: var(--color-card); border-radius: var(--radius-lg); border: 1px solid var(--color-border); transition: var(--transition); }
.news-card:hover { box-shadow: var(--shadow-md); border-color: rgba(74,108,247,0.15); transform: translateX(4px); }
.news-card .cover { width: 120px; height: 80px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; background: var(--color-bg); }
.news-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.news-card .info { flex: 1; min-width: 0; }
.news-card .info h3 { font-size: 1.05rem; font-weight: 600; color: var(--color-dark); margin-bottom: 6px; line-height: 1.4; }
.news-card .info p { font-size: 0.88rem; color: var(--color-text-weak); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .meta { display: flex; align-items: center; gap: 14px; margin-top: 8px; font-size: 0.78rem; color: var(--color-text-light); }
.news-card .meta .cat { display: inline-block; padding: 2px 10px; border-radius: 40px; background: rgba(74,108,247,0.08); color: var(--color-primary); font-weight: 500; font-size: 0.72rem; }
.news-card .meta .date { display: flex; align-items: center; gap: 4px; }
.news-card .meta .date svg { width: 14px; height: 14px; }
.news-empty { text-align: center; padding: 48px 20px; color: var(--color-text-light); background: var(--color-card); border-radius: var(--radius-lg); border: 1px dashed var(--color-border); }
.news-empty svg { width: 48px; height: 48px; color: var(--color-text-light); margin-bottom: 12px; opacity: 0.4; }
.news-empty p { font-size: 1rem; }

/* Reviews */
.reviews { background: var(--color-card); }
.reviews-scroll { display: flex; gap: 24px; overflow-x: auto; padding: 8px 4px 20px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
.reviews-scroll::-webkit-scrollbar { height: 6px; }
.reviews-scroll::-webkit-scrollbar-track { background: var(--color-bg); border-radius: 4px; }
.reviews-scroll::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
.review-card { min-width: 320px; max-width: 360px; flex-shrink: 0; scroll-snap-align: start; padding: 28px 24px; background: var(--color-bg); border-radius: var(--radius-lg); border: 1px solid var(--color-border); transition: var(--transition); }
.review-card:hover { box-shadow: var(--shadow-md); }
.review-card .user { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.review-card .user .avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 1rem; flex-shrink: 0; }
.review-card .user .name { font-weight: 600; font-size: 0.95rem; color: var(--color-dark); }
.review-card .stars { display: flex; gap: 2px; margin-bottom: 10px; }
.review-card .stars svg { width: 16px; height: 16px; color: #F59E0B; }
.review-card .stars svg.empty { color: var(--color-border); }
.review-card .text { font-size: 0.9rem; color: var(--color-text-weak); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.review-card .time { font-size: 0.75rem; color: var(--color-text-light); margin-top: 10px; }

/* Bottom CTA */
.cta-section { background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #2D3A5E 100%); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; opacity: 0.08; pointer-events: none; }
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 14px; }
.cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.65); max-width: 540px; margin: 0 auto 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-actions .btn-download { background: var(--color-accent); color: #1E293B; box-shadow: 0 4px 14px rgba(245,158,11,0.4); }
.cta-actions .btn-download:hover { background: #E68A00; color: #1E293B; box-shadow: 0 8px 24px rgba(245,158,11,0.5); }
.cta-actions .btn-ghost { border-color: rgba(255,255,255,0.25); }

/* Footer */
.footer { background: #0F172A; color: rgba(255,255,255,0.6); padding: 60px 0 30px; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo .logo-icon { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; color: rgba(255,255,255,0.5); }
.footer-col h4 { font-size: 0.9rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.85rem; color: rgba(255,255,255,0.5); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--color-primary); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.8rem; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.35); margin: 0 6px; }
.footer-bottom a:hover { color: var(--color-primary); }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-social a:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(74,108,247,0.08); }
.footer-social a svg { width: 18px; height: 18px; }

/* Mobile Nav */
.mobile-nav { display: none; position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); z-index: 999; flex-direction: column; align-items: center; justify-content: center; gap: 28px; opacity: 0; pointer-events: none; transition: var(--transition); }
.mobile-nav.open { opacity: 1; pointer-events: auto; }
.mobile-nav a { font-size: 1.2rem; font-weight: 500; color: var(--color-dark); padding: 8px 0; border-bottom: 2px solid transparent; }
.mobile-nav a.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

/* Responsive */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero p { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-image { order: -1; }
  .hero-image img { max-width: 80%; margin: 0 auto; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .sysreq-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
  .header-actions .btn-outline { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: flex; }
  .search-box { width: 160px; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }
  .hero { padding: 100px 0 56px; min-height: auto; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 0.95rem; }
  .hero-stats { gap: 20px; }
  .hero-stats-item .num { font-size: 1.3rem; }
  .features-grid { grid-template-columns: 1fr; }
  .sysreq-grid { grid-template-columns: 1fr; }
  .news-card { flex-direction: column; }
  .news-card .cover { width: 100%; height: 160px; }
  .review-card { min-width: 260px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section h2 { font-size: 1.6rem; }
  .carousel-btn { width: 36px; height: 36px; }
  .carousel-btn svg { width: 16px; height: 16px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-actions .btn-download { padding: 12px 24px; font-size: 0.95rem; }
  .header-actions .search-box { display: none; }
  .header-actions .btn { padding: 8px 16px; font-size: 0.82rem; }
  .review-card { min-width: 220px; }
}

/* roulang page: article */
:root {
            --color-primary: #4A6CF7;
            --color-primary-dark: #3B5CE0;
            --color-primary-light: #6B8AFF;
            --color-accent: #F59E0B;
            --color-accent-dark: #D97706;
            --color-secondary: #14B8A6;
            --color-dark: #1E293B;
            --color-dark-light: #334155;
            --color-text: #1E293B;
            --color-text-light: #64748B;
            --color-text-lighter: #94A3B8;
            --color-bg: #F8FAFC;
            --color-bg-alt: #F1F5F9;
            --color-card: #FFFFFF;
            --color-border: #E2E8F0;
            --color-border-light: #F1F5F9;
            --color-success: #10B981;
            --color-error: #EF4444;
            --color-warning: #F59E0B;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 40px -5px rgba(0,0,0,0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --content-width: 800px;
            --nav-height: 72px;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-dark); }
        ul, ol { list-style: none; }

        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .container--narrow { max-width: var(--content-width); }

        /* 导航 */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            height: var(--nav-height);
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .header .container { display: flex; align-items: center; height: 100%; gap: 32px; }
        .logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; color: var(--color-dark); flex-shrink: 0; }
        .logo:hover { color: var(--color-dark); }
        .logo-icon {
            width: 38px; height: 38px; border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: #fff; display: flex; align-items: center; justify-content: center;
            font-weight: 800; font-size: 0.85rem; letter-spacing: 0.5px;
            box-shadow: 0 2px 8px rgba(74,108,247,0.3);
        }
        .nav { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
        .nav a {
            padding: 8px 16px; border-radius: var(--radius-sm);
            font-size: 0.9rem; font-weight: 500; color: var(--color-text-light);
            transition: all var(--transition); white-space: nowrap;
        }
        .nav a:hover { color: var(--color-primary); background: rgba(74,108,247,0.06); }
        .nav a.active { color: var(--color-primary); background: rgba(74,108,247,0.1); font-weight: 600; }
        .header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .header-actions .search-box {
            display: flex; align-items: center; background: var(--color-bg-alt);
            border-radius: var(--radius-md); padding: 0 14px; border: 1px solid var(--color-border);
            transition: all var(--transition); height: 40px;
        }
        .header-actions .search-box:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(74,108,247,0.12); }
        .header-actions .search-box input {
            border: none; background: transparent; outline: none; padding: 8px 0;
            font-size: 0.875rem; color: var(--color-text); width: 140px;
        }
        .header-actions .search-box input::placeholder { color: var(--color-text-lighter); }
        .header-actions .search-box i { color: var(--color-text-lighter); font-size: 0.9rem; margin-right: 8px; }
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 10px 24px; border-radius: var(--radius-md); font-weight: 600;
            font-size: 0.9rem; border: none; cursor: pointer; transition: all var(--transition);
            white-space: nowrap; line-height: 1.2;
        }
        .btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 2px 8px rgba(74,108,247,0.25); }
        .btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(74,108,247,0.35); color: #fff; }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
        .btn-outline:hover { background: rgba(74,108,247,0.06); border-color: var(--color-primary-dark); color: var(--color-primary-dark); }
        .btn-accent { background: var(--color-accent); color: #fff; box-shadow: 0 2px 8px rgba(245,158,11,0.25); }
        .btn-accent:hover { background: var(--color-accent-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(245,158,11,0.35); color: #fff; }
        .btn-sm { padding: 7px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 14px 32px; font-size: 1rem; }
        .btn .icon { font-size: 1.1em; }
        .btn-download { background: var(--color-primary); color: #fff; padding: 10px 22px; border-radius: var(--radius-md); font-weight: 600; font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
        .btn-download:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(74,108,247,0.35); }
        .btn-download i { font-size: 1rem; }

        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { display: block; width: 24px; height: 2px; background: var(--color-dark); border-radius: 2px; transition: all var(--transition); }

        /* 面包屑 */
        .breadcrumb {
            padding: 24px 0 12px; font-size: 0.85rem; color: var(--color-text-lighter);
            display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--color-text-light); }
        .breadcrumb a:hover { color: var(--color-primary); }
        .breadcrumb .sep { color: var(--color-text-lighter); font-size: 0.75rem; }
        .breadcrumb .current { color: var(--color-text); font-weight: 500; }

        /* 文章头 */
        .article-header {
            padding: 40px 0 32px; border-bottom: 1px solid var(--color-border);
        }
        .article-header .meta {
            display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
            font-size: 0.875rem; color: var(--color-text-light); margin-bottom: 16px;
        }
        .article-header .meta .tag {
            padding: 3px 12px; border-radius: 20px; background: rgba(74,108,247,0.1);
            color: var(--color-primary); font-weight: 500; font-size: 0.8rem;
        }
        .article-header .meta .date i { margin-right: 4px; }
        .article-header h1 {
            font-size: 2.5rem; font-weight: 800; letter-spacing: -0.02em;
            line-height: 1.25; margin-bottom: 16px; color: var(--color-dark);
        }
        .article-header .excerpt {
            font-size: 1.1rem; color: var(--color-text-light); line-height: 1.7; max-width: 720px;
        }

        /* 文章主体 */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-body {
            max-width: var(--content-width); margin: 0 auto;
            font-size: 1.05rem; line-height: 1.85; color: var(--color-text);
        }
        .article-body h2 { font-size: 1.75rem; margin: 40px 0 16px; padding-bottom: 8px; border-bottom: 2px solid var(--color-border-light); }
        .article-body h3 { font-size: 1.35rem; margin: 32px 0 12px; }
        .article-body h4 { font-size: 1.1rem; margin: 24px 0 8px; }
        .article-body p { margin-bottom: 20px; }
        .article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; }
        .article-body ul li { list-style: disc; margin-bottom: 6px; }
        .article-body ol li { list-style: decimal; margin-bottom: 6px; }
        .article-body blockquote {
            margin: 24px 0; padding: 16px 24px; border-left: 4px solid var(--color-primary);
            background: rgba(74,108,247,0.04); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-light); font-style: italic;
        }
        .article-body blockquote p:last-child { margin-bottom: 0; }
        .article-body img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-md); }
        .article-body figcaption { text-align: center; font-size: 0.85rem; color: var(--color-text-lighter); margin-top: -12px; margin-bottom: 24px; }
        .article-body code {
            background: var(--color-bg-alt); padding: 2px 8px; border-radius: 4px;
            font-family: 'JetBrains Mono', 'Fira Code', monospace; font-size: 0.9em;
        }
        .article-body pre {
            background: var(--color-dark); color: #f1f5f9; padding: 20px 24px; border-radius: var(--radius-md);
            overflow-x: auto; margin: 24px 0; font-size: 0.9rem; line-height: 1.6;
        }
        .article-body pre code { background: transparent; padding: 0; color: inherit; }
        .article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
        .article-body th, .article-body td { padding: 12px 16px; border: 1px solid var(--color-border); text-align: left; }
        .article-body th { background: var(--color-bg-alt); font-weight: 600; }
        .article-body a { text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { text-decoration: none; }

        /* 空文章状态 */
        .article-empty {
            text-align: center; padding: 80px 24px; max-width: 600px; margin: 0 auto;
        }
        .article-empty .empty-icon { font-size: 4rem; color: var(--color-text-lighter); margin-bottom: 24px; opacity: 0.5; }
        .article-empty h2 { font-size: 1.5rem; margin-bottom: 12px; }
        .article-empty p { color: var(--color-text-light); margin-bottom: 24px; }

        /* 文章底部导航 */
        .article-footer-nav {
            max-width: var(--content-width); margin: 48px auto 0;
            display: flex; justify-content: space-between; gap: 16px;
            border-top: 1px solid var(--color-border); padding-top: 32px;
        }
        .article-footer-nav a {
            display: flex; align-items: center; gap: 8px; padding: 12px 20px;
            border-radius: var(--radius-md); border: 1px solid var(--color-border);
            transition: all var(--transition); color: var(--color-text); flex: 1;
            font-size: 0.9rem; max-width: 48%;
        }
        .article-footer-nav a:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(74,108,247,0.03); }
        .article-footer-nav .next { text-align: right; justify-content: flex-end; }
        .article-footer-nav .prev i { margin-right: 4px; }
        .article-footer-nav .next i { margin-left: 4px; }
        .article-footer-nav .label { display: block; font-size: 0.75rem; color: var(--color-text-lighter); margin-bottom: 2px; }
        .article-footer-nav .title { font-weight: 600; }

        /* 相关文章 */
        .related-section { background: var(--color-bg-alt); padding: 64px 0; margin-top: 48px; }
        .related-section h2 { font-size: 1.5rem; margin-bottom: 32px; text-align: center; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .related-card {
            background: var(--color-card); border-radius: var(--radius-lg);
            border: 1px solid var(--color-border); overflow: hidden;
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img { height: 180px; background: var(--color-bg-alt); display: flex; align-items: center; justify-content: center; overflow: hidden; }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body .card-meta { font-size: 0.8rem; color: var(--color-text-lighter); }
        .related-card .card-body .card-meta i { margin-right: 4px; }

        /* 评论区占位 */
        .comment-section {
            max-width: var(--content-width); margin: 48px auto 0;
            padding: 40px; background: var(--color-card); border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
        }
        .comment-section h3 { font-size: 1.25rem; margin-bottom: 24px; display: flex; align-items: center; gap: 8px; }
        .comment-form { display: grid; gap: 16px; }
        .comment-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
        .comment-form input, .comment-form textarea {
            padding: 12px 16px; border-radius: var(--radius-md); border: 1px solid var(--color-border);
            background: var(--color-bg); transition: all var(--transition); width: 100%;
            color: var(--color-text);
        }
        .comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(74,108,247,0.12); }
        .comment-form textarea { resize: vertical; min-height: 100px; }
        .comment-list { margin-top: 32px; }
        .comment-item { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--color-border-light); }
        .comment-item:last-child { border-bottom: none; }
        .comment-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--color-bg-alt); flex-shrink: 0; display: flex; align-items: center; justify-content: center; color: var(--color-text-lighter); font-size: 1.2rem; }
        .comment-body .name { font-weight: 600; font-size: 0.9rem; }
        .comment-body .time { font-size: 0.8rem; color: var(--color-text-lighter); margin-left: 12px; }
        .comment-body .text { margin-top: 6px; font-size: 0.95rem; color: var(--color-text-light); line-height: 1.6; }

        /* 页脚 */
        .footer {
            background: var(--color-dark); color: rgba(255,255,255,0.85); padding: 64px 0 32px;
        }
        .footer .logo { color: #fff; }
        .footer .logo-icon { background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary)); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; margin-top: 16px; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 20px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.875rem; margin-bottom: 12px; transition: all var(--transition); }
        .footer-col a:hover { color: var(--color-primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
            display: flex; justify-content: space-between; align-items: center;
            font-size: 0.85rem; color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--color-primary-light); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6); transition: all var(--transition); }
        .footer-social a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
        .footer-social svg { width: 18px; height: 18px; }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav { gap: 2px; }
            .nav a { padding: 6px 12px; font-size: 0.85rem; }
            .header-actions .search-box input { width: 100px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .container { padding: 0 16px; }
            .nav { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px; border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-lg); }
            .nav.open { display: flex; }
            .nav a { width: 100%; padding: 12px 16px; }
            .hamburger { display: flex; }
            .header-actions .search-box { display: none; }
            .header-actions .btn { padding: 8px 16px; font-size: 0.85rem; }
            .article-header h1 { font-size: 1.75rem; }
            .article-header { padding: 24px 0 20px; }
            .article-body { font-size: 1rem; }
            .article-body h2 { font-size: 1.4rem; }
            .article-body h3 { font-size: 1.15rem; }
            .article-footer-nav { flex-direction: column; }
            .article-footer-nav a { max-width: 100%; }
            .related-grid { grid-template-columns: 1fr; }
            .comment-section { padding: 24px; }
            .comment-form .form-row { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-header h1 { font-size: 1.5rem; }
            .article-body { font-size: 0.95rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .breadcrumb { font-size: 0.8rem; }
            .article-header .meta { font-size: 0.8rem; gap: 10px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #4A6CF7;
            --color-primary-dark: #3B5CE0;
            --color-primary-light: #6B8AFF;
            --color-accent: #F59E0B;
            --color-accent-hover: #D97706;
            --color-teal: #14B8A6;
            --color-dark: #1E293B;
            --color-dark-soft: #334155;
            --color-text: #475569;
            --color-text-light: #94A3B8;
            --color-border: #E2E8F0;
            --color-bg: #F8FAFC;
            --color-white: #FFFFFF;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-error: #EF4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px -2px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px -8px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 48px -12px rgba(0,0,0,0.18);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--color-primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--color-dark); font-weight: 700; line-height: 1.3; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-dark);
            flex-shrink: 0;
        }
        .logo:hover { color: var(--color-dark); }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-dark-soft);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--color-primary);
            background: rgba(74, 108, 247, 0.06);
        }
        .nav a.active {
            color: var(--color-primary);
            background: rgba(74, 108, 247, 0.10);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 0 14px;
            height: 40px;
            width: 200px;
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.12);
        }
        .search-box svg { width: 18px; height: 18px; color: var(--color-text-light); flex-shrink: 0; }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            padding: 0 8px;
            width: 100%;
            font-size: 0.875rem;
            color: var(--color-dark);
        }
        .search-box input::placeholder { color: var(--color-text-light); }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            line-height: 1.4;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(74, 108, 247, 0.25);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(74, 108, 247, 0.35);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 4px rgba(74,108,247,0.2); }
        .btn-outline {
            background: transparent;
            color: var(--color-dark-soft);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline:hover {
            background: rgba(74, 108, 247, 0.06);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 158, 11, 0.4);
        }
        .btn-sm { padding: 7px 16px; font-size: 0.82rem; border-radius: var(--radius-sm); }
        .btn .icon { width: 18px; height: 18px; flex-shrink: 0; }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
        .hamburger span { display: block; width: 24px; height: 2px; background: var(--color-dark); border-radius: 2px; transition: all 0.3s; }
        .mobile-nav { display: none; }
        @media (max-width: 1024px) {
            .nav { display: none; }
            .search-box { display: none; }
            .hamburger { display: flex; }
            .nav-right .btn-outline { display: none; }
            .mobile-nav {
                display: none;
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--color-white);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                padding: 16px 24px 24px;
                z-index: 999;
            }
            .mobile-nav.open { display: block; }
            .mobile-nav a {
                display: block;
                padding: 12px 0;
                font-size: 1rem;
                font-weight: 500;
                color: var(--color-dark-soft);
                border-bottom: 1px solid var(--color-border);
            }
            .mobile-nav a:last-child { border-bottom: none; }
            .mobile-nav a.active { color: var(--color-primary); }
            .mobile-nav .search-box { display: flex; width: 100%; margin-top: 12px; }
            .mobile-nav .btn { width: 100%; margin-top: 12px; }
        }
        @media (max-width: 520px) {
            :root { --header-h: 64px; }
            .logo { font-size: 1.05rem; }
            .logo-icon { width: 32px; height: 32px; font-size: 0.8rem; }
            .nav-right .btn-primary { padding: 8px 14px; font-size: 0.8rem; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 20px 0 8px;
            font-size: 0.85rem;
            color: var(--color-text-light);
        }
        .breadcrumb a { color: var(--color-text-light); }
        .breadcrumb a:hover { color: var(--color-primary); }
        .breadcrumb span { margin: 0 6px; color: var(--color-border); }
        .breadcrumb .current { color: var(--color-dark-soft); font-weight: 500; }

        /* ===== Hero ===== */
        .hero-category {
            position: relative;
            padding: 60px 0 70px;
            background: linear-gradient(135deg, #1E293B 0%, #1a1f3a 50%, #0f1a2e 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .hero-category .container { position: relative; z-index: 2; }
        .hero-category h1 {
            color: #fff;
            font-size: 2.75rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            max-width: 700px;
        }
        .hero-category p {
            color: rgba(255,255,255,0.8);
            font-size: 1.15rem;
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .hero-category .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .hero-category .hero-tags span {
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(4px);
            color: rgba(255,255,255,0.9);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            border: 1px solid rgba(255,255,255,0.08);
        }
        @media (max-width: 768px) {
            .hero-category { padding: 40px 0 50px; min-height: 240px; }
            .hero-category h1 { font-size: 2rem; }
            .hero-category p { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .hero-category h1 { font-size: 1.65rem; }
            .hero-category p { font-size: 0.9rem; }
            .hero-category .hero-tags span { font-size: 0.75rem; padding: 4px 12px; }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 64px 0;
        }
        .section-alt { background: var(--color-white); }
        .section-dark {
            background: var(--color-dark);
            color: rgba(255,255,255,0.85);
        }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 580px;
            margin: 0 auto;
        }
        .section-dark .section-header p { color: rgba(255,255,255,0.6); }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-header { margin-bottom: 32px; }
            .section-header h2 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .section { padding: 36px 0; }
            .section-header h2 { font-size: 1.35rem; }
            .section-header p { font-size: 0.9rem; }
        }

        /* ===== Version Release ===== */
        .version-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 36px 40px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
            max-width: 900px;
            margin: 0 auto;
        }
        .version-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
        .version-card .version-badge {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .version-card .version-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-dark);
            margin-bottom: 6px;
        }
        .version-card .version-date {
            color: var(--color-text-light);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .version-card .version-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .version-card .version-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--color-text);
        }
        .version-card .version-features li::before {
            content: '✓';
            color: var(--color-success);
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }
        @media (max-width: 768px) {
            .version-card { padding: 28px 24px; }
            .version-card .version-number { font-size: 1.5rem; }
            .version-card .version-features { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .version-card { padding: 20px 16px; }
        }

        /* ===== Timeline ===== */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-border);
        }
        .timeline-item {
            position: relative;
            padding-bottom: 40px;
            padding-left: 24px;
        }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 3px solid var(--color-white);
            box-shadow: 0 0 0 2px var(--color-primary);
        }
        .timeline-item .tl-tag {
            display: inline-block;
            background: rgba(74, 108, 247, 0.10);
            color: var(--color-primary);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .timeline-item h3 {
            font-size: 1.15rem;
            margin-bottom: 4px;
        }
        .timeline-item .tl-desc {
            font-size: 0.92rem;
            color: var(--color-text-light);
        }
        .timeline-item .tl-desc strong { color: var(--color-text); }
        @media (max-width: 768px) {
            .timeline { padding-left: 28px; }
            .timeline-item { padding-left: 16px; }
            .timeline-item::before { left: -22px; width: 12px; height: 12px; }
        }

        /* ===== Category Grid ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 32px 28px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .cat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .cat-card .cat-icon {
            width: 56px;
            height: 56px;
            background: rgba(74, 108, 247, 0.08);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
        }
        .cat-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .cat-card p { font-size: 0.9rem; color: var(--color-text-light); line-height: 1.6; }
        @media (max-width: 1024px) {
            .cat-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .cat-grid { grid-template-columns: 1fr; }
            .cat-card { padding: 24px 20px; }
        }

        /* ===== Feedback / Quote ===== */
        .feedback-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feedback-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .feedback-card:hover { box-shadow: var(--shadow-md); }
        .feedback-card .fb-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 14px;
        }
        .feedback-card .fb-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .feedback-card .fb-name { font-weight: 600; color: var(--color-dark); font-size: 0.95rem; }
        .feedback-card .fb-role { font-size: 0.8rem; color: var(--color-text-light); }
        .feedback-card .fb-text {
            font-size: 0.92rem;
            color: var(--color-text);
            line-height: 1.7;
            font-style: italic;
        }
        .feedback-card .fb-text::before { content: '"'; }
        .feedback-card .fb-text::after { content: '"'; }
        @media (max-width: 1024px) {
            .feedback-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .feedback-grid { grid-template-columns: 1fr; }
        }

        /* ===== Roadmap ===== */
        .roadmap-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .roadmap-card {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.10);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
        }
        .roadmap-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-3px); }
        .roadmap-card .rm-status {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
            background: rgba(245, 158, 11, 0.20);
            color: var(--color-accent);
        }
        .roadmap-card .rm-status.soon { background: rgba(16, 185, 129, 0.20); color: var(--color-success); }
        .roadmap-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: #fff; }
        .roadmap-card p { font-size: 0.88rem; color: rgba(255,255,255,0.6); line-height: 1.6; }
        @media (max-width: 1024px) {
            .roadmap-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .roadmap-grid { grid-template-columns: 1fr; }
            .roadmap-card { padding: 24px 16px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-white);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--color-primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--color-dark);
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(74, 108, 247, 0.04); }
        .faq-question .faq-icon {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            transition: transform var(--transition);
            color: var(--color-text-light);
        }
        .faq-item.open .faq-question .faq-icon { transform: rotate(45deg); color: var(--color-primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--color-text);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        @media (max-width: 520px) {
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .faq-answer { padding: 0 16px; font-size: 0.85rem; }
            .faq-item.open .faq-answer { padding: 0 16px 16px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #2a3f8a 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            margin-bottom: 32px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
        }
        .cta-section .btn-primary:hover { background: var(--color-accent-hover); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.5); }
        .cta-section .btn-outline {
            border-color: rgba(255,255,255,0.3);
            color: #fff;
        }
        .cta-section .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: #fff; }
        @media (max-width: 768px) {
            .cta-section { padding: 52px 0; }
            .cta-section h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .cta-section .cta-btns { flex-direction: column; align-items: center; }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 32px;
        }
        .footer a { color: rgba(255,255,255,0.65); }
        .footer a:hover { color: var(--color-primary-light); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 340px; }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.88rem;
            transition: all var(--transition);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
        }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--color-primary); color: #fff; }
        .footer-social a svg { width: 18px; height: 18px; fill: currentColor; }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 520px) {
            .footer { padding: 40px 0 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-12 { margin-bottom: 12px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }
        .animate-delay-4 { animation-delay: 0.4s; }