/* roulang page: index */
:root{
  --primary:#e0245e;
  --primary-dark:#b81d4e;
  --primary-light:#ff5a8a;
  --accent:#9b5cff;
  --bg:#0f0e14;
  --bg-soft:#17151f;
  --bg-card:#1f1c2a;
  --bg-card-hover:#272333;
  --text:#f5f2f7;
  --text-weak:#a89fae;
  --text-mute:#6e6575;
  --border:#352e42;
  --border-light:#443c52;
  --radius:16px;
  --radius-sm:10px;
  --radius-lg:24px;
  --shadow:0 10px 34px rgba(0,0,0,.45);
  --shadow-hover:0 16px 44px rgba(224,36,94,.22);
  --transition:.28s cubic-bezier(.4,0,.2,1);
  --font-base:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-base);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none;transition:var(--transition)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-sm{max-width:960px;margin:0 auto;padding:0 24px}

/* Header Nav */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(15,14,20,.88);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:20px;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-size:22px;font-weight:800;letter-spacing:1px;
  color:var(--text);
}
.logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 4px rgba(224,36,94,.2),0 0 20px rgba(224,36,94,.5);
}
.logo span{color:var(--primary-light)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  padding:9px 16px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--text-weak);
  transition:var(--transition);white-space:nowrap;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.main-nav a.active{
  color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));
  font-weight:600;box-shadow:0 4px 18px rgba(224,36,94,.35);
}
.nav-toggle{
  display:none;background:none;border:1px solid var(--border);
  border-radius:var(--radius-sm);width:44px;height:44px;
  position:relative;cursor:pointer;z-index:110;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;
  background:var(--text);transition:var(--transition);
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle.open span:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* Hero */
.hero{
  position:relative;
  background:linear-gradient(135deg,rgba(15,14,20,.86),rgba(15,14,20,.72)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:120px 0 100px;
  overflow:hidden;
}
.hero::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:120px;
  background:linear-gradient(to top,var(--bg),transparent);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(224,36,94,.15);border:1px solid rgba(224,36,94,.35);
  border-radius:999px;padding:7px 18px;font-size:13px;font-weight:600;
  color:var(--primary-light);margin-bottom:22px;
}
.hero-badge::before{
  content:'';width:7px;height:7px;border-radius:50%;background:var(--primary-light);
  box-shadow:0 0 12px var(--primary-light);animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:52px;font-weight:900;line-height:1.2;letter-spacing:1px;
  margin-bottom:18px;
}
.hero h1 .grad{
  background:linear-gradient(90deg,var(--primary-light),var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-desc{
  font-size:18px;color:var(--text-weak);margin-bottom:30px;max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:14px 30px;font-weight:700;font-size:15px;
  border:2px solid transparent;cursor:pointer;transition:var(--transition);
  letter-spacing:.5px;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;box-shadow:0 8px 26px rgba(224,36,94,.35);
}
.btn-primary:hover{
  transform:translateY(-3px);box-shadow:0 14px 34px rgba(224,36,94,.5);
}
.btn-ghost{
  background:transparent;border-color:var(--border-light);color:var(--text);
}
.btn-ghost:hover{
  border-color:var(--primary-light);color:var(--primary-light);
  transform:translateY(-2px);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.06);border:1px solid var(--border);
  border-radius:999px;padding:6px 14px;font-size:13px;color:var(--text-weak);
}
.tag::before{content:'✓';color:var(--primary-light);font-weight:800}

/* Section 通用 */
.section{padding:84px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 52px}
.section-label{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:3px;
  color:var(--primary-light);text-transform:uppercase;margin-bottom:10px;
}
.section-head h2{font-size:34px;font-weight:900;letter-spacing:.5px;line-height:1.2}
.section-head p{color:var(--text-weak);margin-top:12px;font-size:16px}

/* Features */
.features{
  background:var(--bg-soft);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.feature-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:30px 24px;text-align:center;
  transition:var(--transition);
}
.feature-card:hover{
  border-color:var(--primary);transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
}
.feature-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;
  background:linear-gradient(135deg,rgba(224,36,94,.2),rgba(155,92,255,.2));
  display:flex;align-items:center;justify-content:center;
  font-size:28px;color:var(--primary-light);
}
.feature-card h3{font-size:18px;margin-bottom:8px;font-weight:700}
.feature-card p{font-size:14px;color:var(--text-weak);line-height:1.6}

/* News */
.news-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
}
.news-card{
  display:flex;flex-direction:column;justify-content:space-between;
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:26px;
  transition:var(--transition);min-height:160px;
}
.news-card:hover{
  border-color:var(--primary);box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.news-card h3{font-size:17px;font-weight:700;line-height:1.45;margin-bottom:10px}
.news-card h3 a:hover{color:var(--primary-light)}
.news-card .news-desc{
  font-size:14px;color:var(--text-weak);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:14px;
}
.news-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.badge{
  display:inline-block;background:rgba(224,36,94,.14);
  color:var(--primary-light);border:1px solid rgba(224,36,94,.3);
  border-radius:999px;padding:3px 12px;font-size:12px;font-weight:600;
}
.badge-accent{
  background:rgba(155,92,255,.14);color:var(--accent);
  border-color:rgba(155,92,255,.3);
}
.news-meta time{font-size:13px;color:var(--text-mute)}
.empty-note{
  grid-column:1/-1;text-align:center;padding:50px 20px;
  color:var(--text-weak);font-size:16px;
  background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border);
}

/* Categories */
.categories{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.category-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:20px;
}
.category-card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  background:var(--bg-card);border:1px solid var(--border);
  transition:var(--transition);min-height:280px;
  display:flex;align-items:flex-end;
}
.category-card::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(15,14,20,.95) 0%,rgba(15,14,20,.35) 50%,rgba(15,14,20,.1) 100%);
  z-index:1;transition:var(--transition);
}
.category-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0}
.category-card:hover::before{background:linear-gradient(to top,rgba(224,36,94,.45),rgba(15,14,20,.25))}
.category-card-info{
  position:relative;z-index:2;padding:22px 20px;width:100%;
}
.category-card-info h3{font-size:17px;font-weight:800;margin-bottom:4px}
.category-card-info p{font-size:13px;color:var(--text-weak);line-height:1.5}
.category-link{
  display:inline-flex;align-items:center;gap:5px;margin-top:10px;
  font-size:13px;font-weight:700;color:var(--primary-light);
}
.category-link::after{content:'→';transition:transform var(--transition)}
.category-card:hover .category-link::after{transform:translateX(4px)}

/* Hot */
.hot-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.hot-card{
  background:var(--bg-card);border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);transition:var(--transition);
}
.hot-card:hover{
  transform:translateY(-5px);border-color:var(--primary);
  box-shadow:var(--shadow-hover);
}
.hot-card .thumb{
  position:relative;aspect-ratio:16/10;overflow:hidden;
}
.hot-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.hot-card:hover .thumb img{transform:scale(1.06)}
.hot-card .thumb::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(15,14,20,.65),transparent 55%);
}
.hot-card .play-icon{
  position:absolute;z-index:3;top:50%;left:50%;transform:translate(-50%,-50%);
  width:54px;height:54px;border-radius:50%;
  background:rgba(224,36,94,.85);border:2px solid rgba(255,255,255,.5);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:var(--transition);backdrop-filter:blur(4px);
}
.hot-card:hover .play-icon{opacity:1}
.play-icon::after{
  content:'';width:0;height:0;
  border-top:9px solid transparent;border-bottom:9px solid transparent;
  border-left:14px solid #fff;margin-left:4px;
}
.hot-card .hot-body{padding:18px 18px 20px}
.hot-card .hot-body h3{font-size:16px;font-weight:700;line-height:1.4;margin-bottom:8px}
.hot-card .hot-body p{
  font-size:13px;color:var(--text-weak);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.hot-meta{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.hot-meta .views{font-size:12px;color:var(--text-mute);display:flex;align-items:center;gap:4px}
.hot-meta .views::before{content:'▶';font-size:10px;color:var(--primary-light)}

/* Stats */
.stats{
  position:relative;
  background:linear-gradient(135deg,rgba(224,36,94,.1),rgba(155,92,255,.08)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:70px 0;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-item{
  text-align:center;background:rgba(15,14,20,.65);
  border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);
  padding:34px 20px;backdrop-filter:blur(8px);transition:var(--transition);
}
.stat-item:hover{border-color:var(--primary)}
.stat-num{
  font-size:42px;font-weight:900;line-height:1.1;
  background:linear-gradient(90deg,var(--primary-light),var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat-label{font-size:14px;color:var(--text-weak);margin-top:8px}

/* FAQ */
.faq{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{border-color:var(--primary)}
.faq-item summary{
  padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;
  list-style:none;display:flex;align-items:center;justify-content:space-between;
  transition:var(--transition);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';font-size:24px;font-weight:400;color:var(--primary-light);
  transition:var(--transition);flex-shrink:0;margin-left:16px;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-body{
  padding:0 24px 20px;color:var(--text-weak);font-size:15px;line-height:1.7;
}

/* CTA */
.cta{
  text-align:center;padding:90px 0;
  background:radial-gradient(ellipse at center,rgba(224,36,94,.12),transparent 65%),var(--bg);
}
.cta h2{font-size:36px;font-weight:900;margin-bottom:14px}
.cta p{color:var(--text-weak);max-width:600px;margin:0 auto 32px;font-size:17px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* Footer */
.site-footer{
  background:var(--bg-soft);
  border-top:1px solid var(--border);
  padding:56px 0 30px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;
  margin-bottom:40px;
}
.footer-brand h3{
  font-size:22px;font-weight:800;margin-bottom:12px;
}
.footer-brand p{color:var(--text-weak);font-size:14px;line-height:1.7;max-width:300px}
.footer-brand .logo{font-size:20px;margin-bottom:14px}
.footer-col h4{
  font-size:15px;font-weight:700;margin-bottom:18px;
  color:var(--text);letter-spacing:1px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:var(--text-weak);transition:var(--transition)}
.footer-col ul li a:hover{color:var(--primary-light);padding-left:4px}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:24px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
}
.footer-bottom p{font-size:13px;color:var(--text-mute)}
.footer-bottom .tech-info{font-size:12px;color:var(--text-mute)}

/* 响应式 */
@media(max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .category-grid{grid-template-columns:repeat(3,1fr)}
  .hot-grid{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:42px}
}
@media(max-width:768px){
  .nav-toggle{display:block}
  .main-nav{
    position:fixed;top:72px;right:0;bottom:0;width:280px;
    background:var(--bg-soft);flex-direction:column;
    align-items:stretch;padding:30px 20px;gap:10px;
    transform:translateX(100%);transition:transform var(--transition);
    border-left:1px solid var(--border);z-index:99;
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav a{
    padding:14px 20px;border-radius:var(--radius-sm);
    font-size:16px;color:var(--text);
  }
  .main-nav a.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
  .hero{padding:90px 0 70px}
  .hero h1{font-size:34px}
  .hero-desc{font-size:16px}
  .section{padding:64px 0}
  .section-head h2{font-size:28px}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .cta h2{font-size:28px}
}
@media(max-width:520px){
  .container{padding:0 18px}
  .hero h1{font-size:29px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{width:100%}
  .feature-grid{grid-template-columns:1fr}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .hot-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #e11d48;
    --primary-dark: #be123c;
    --primary-light: #fb7185;
    --accent: #f59e0b;
    --bg-deep: #0a0a12;
    --bg-surface: #11111c;
    --bg-card: #181826;
    --bg-card-hover: #202034;
    --text-main: #f1f1f7;
    --text-secondary: #a1a1b2;
    --text-muted: #6b6b7d;
    --border: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.14);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
    --container-w: 1200px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --transition: all 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background-color: var(--bg-deep);
    background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(225, 29, 72, 0.08), transparent);
    color: var(--text-main);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }

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

/* ===== 头部导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 18, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--text-main);
    white-space: nowrap;
}

.logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.25), 0 0 16px rgba(225, 29, 72, 0.6);
    flex-shrink: 0;
}

.logo span {
    color: var(--primary-light);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.main-nav a {
    display: inline-block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 999px;
    border: 1px solid transparent;
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.main-nav a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 16px rgba(225, 29, 72, 0.35);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    background: var(--bg-card);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

.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); }

/* ===== 文章 Hero ===== */
.article-hero {
    position: relative;
    min-height: 420px;
    display: flex;
    align-items: flex-end;
    padding: 100px 0 70px;
    background:
        linear-gradient(180deg, rgba(10, 10, 18, 0.65) 0%, rgba(10, 10, 18, 0.88) 100%),
        url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(180deg, rgba(10, 10, 18, 0.9), transparent);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
    max-width: 860px;
}

.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

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

.article-breadcrumb a:hover { text-decoration: underline; }

.article-breadcrumb .sep {
    color: var(--text-muted);
    opacity: 0.6;
}

.article-cat-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, rgba(225, 29, 72, 0.9), rgba(190, 18, 60, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.15);
    margin-bottom: 16px;
}

.article-hero h1 {
    font-size: 38px;
    line-height: 1.3;
    font-weight: 800;
    letter-spacing: 0.5px;
    margin-bottom: 18px;
    color: #fff;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.meta-item i {
    font-style: normal;
    opacity: 0.8;
}

.meta-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
}

/* ===== 文章正文区 ===== */
.article-section {
    padding: 70px 0 40px;
    position: relative;
}

.article-layout {
    max-width: 860px;
    margin: 0 auto;
}

.article-body {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 42px 50px;
    box-shadow: var(--shadow-sm);
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-main);
}

.article-body p {
    margin-bottom: 20px;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 32px 0 16px;
    color: var(--text-main);
    padding-left: 14px;
    border-left: 4px solid var(--primary);
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 24px 0 12px;
    color: var(--text-main);
}

.article-body ul {
    margin: 16px 0 24px;
    padding-left: 0;
}

.article-body ul li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.article-body ul li::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 12px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary-light);
}

.article-body blockquote {
    margin: 24px 0;
    padding: 20px 24px;
    background: rgba(225, 29, 72, 0.08);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.article-body img {
    border-radius: var(--radius-md);
    margin: 20px 0;
    box-shadow: var(--shadow-sm);
}

/* ===== 空状态 ===== */
.article-empty {
    text-align: center;
    padding: 60px 30px;
    background: var(--bg-surface);
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-lg);
}

.empty-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 16px;
}

.article-empty h2 {
    font-size: 26px;
    margin-bottom: 10px;
}

.article-empty p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ===== 按钮 ===== */
.btn-primary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 34px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 6px 20px rgba(225, 29, 72, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(225, 29, 72, 0.5);
    color: #fff;
}

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

.btn-outline {
    border-color: var(--border-light);
    color: var(--text-main);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(225, 29, 72, 0.06);
}

/* ===== 标签区 ===== */
.tag-section {
    padding: 20px 0 50px;
}

.tag-inner {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
}

.tag-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 4px;
}

.tag-chip {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.tag-chip:hover {
    background: rgba(225, 29, 72, 0.12);
    border-color: var(--primary);
    color: var(--primary-light);
}

/* ===== 相关推荐 ===== */
.related-section {
    padding: 70px 0;
    background: linear-gradient(180deg, var(--bg-deep), var(--bg-surface));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 16px;
}

.section-head h2 {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: 0.5px;
    position: relative;
    padding-bottom: 10px;
}

.section-head h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 42px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), transparent);
}

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

.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.movie-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.movie-card:hover {
    transform: translateY(-6px);
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.movie-thumb {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.movie-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.45s ease;
}

.movie-card:hover .movie-thumb img {
    transform: scale(1.06);
}

.movie-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.45));
}

.movie-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: rgba(225, 29, 72, 0.85);
    border-radius: 999px;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

.movie-badge.hot {
    background: rgba(245, 158, 11, 0.9);
}

.movie-info {
    padding: 18px 20px 20px;
}

.movie-info h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-main);
    line-height: 1.4;
}

.movie-info p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

.movie-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--text-muted);
}

.movie-meta .views {
    color: var(--text-secondary);
}

.movie-meta .heat {
    color: var(--accent);
    font-weight: 600;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 80px 0;
}

.faq-grid {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
}

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    transition: var(--transition);
}

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

.faq-item h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-item h3::before {
    content: '';
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.2);
}

.faq-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 18px;
}

/* ===== CTA ===== */
.cta-section {
    position: relative;
    padding: 90px 0;
    text-align: center;
    background:
        linear-gradient(135deg, rgba(225, 29, 72, 0.85), rgba(10, 10, 18, 0.92)),
        url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 60%);
    pointer-events: none;
}

.cta-inner {
    position: relative;
    z-index: 2;
    max-width: 680px;
    margin: 0 auto;
}

.cta-inner h2 {
    font-size: 34px;
    font-weight: 800;
    margin-bottom: 16px;
    color: #fff;
    letter-spacing: 1px;
}

.cta-inner p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.cta-section .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.cta-section .btn-outline {
    border-color: rgba(255, 255, 255, 0.5);
    color: #fff;
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.footer-brand p {
    margin-top: 14px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 340px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

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

.footer-bottom .tech-info {
    color: var(--text-muted);
    opacity: 0.6;
}

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

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

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

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

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

    .main-nav {
        position: fixed;
        top: 72px;
        left: 16px;
        right: 16px;
        background: var(--bg-surface);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 14px;
        flex-direction: column;
        align-items: stretch;
        opacity: 0;
        transform: translateY(-12px) scale(0.98);
        pointer-events: none;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        z-index: 99;
    }

    .main-nav.open {
        opacity: 1;
        transform: translateY(0) scale(1);
        pointer-events: auto;
    }

    .main-nav a {
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        text-align: center;
    }

    .article-section {
        padding: 40px 0 20px;
    }

    .article-body {
        padding: 28px 24px;
    }

    .article-hero {
        min-height: 340px;
        padding: 70px 0 50px;
    }

    .article-hero h1 {
        font-size: 28px;
    }

    .section-head h2 {
        font-size: 24px;
    }

    .faq-section,
    .related-section {
        padding: 50px 0;
    }

    .cta-section {
        padding: 60px 0;
    }

    .cta-inner h2 {
        font-size: 26px;
    }

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

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

@media (max-width: 520px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .logo {
        font-size: 19px;
    }

    .header-inner {
        height: 64px;
    }

    .main-nav {
        top: 64px;
    }

    .article-hero h1 {
        font-size: 23px;
    }

    .article-meta {
        gap: 12px;
        font-size: 13px;
    }

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

    .article-body {
        padding: 22px 18px;
        font-size: 15px;
    }

    .tag-inner {
        padding: 14px 16px;
    }

    .faq-item {
        padding: 20px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn-primary,
    .cta-buttons .btn-outline {
        width: 100%;
    }
}

/* roulang page: category2 */
:root{
  --primary:#e8356c;
  --primary-dark:#c91f56;
  --primary-light:#ff6b9d;
  --accent:#ffb84d;
  --bg:#0e0e14;
  --bg-deep:#09090c;
  --bg-soft:#15151d;
  --bg-card:#1d1d28;
  --text:#f6f6f8;
  --text-weak:#a1a1b5;
  --border:#2a2a38;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.4);
  --shadow-hover:0 18px 52px rgba(232,53,108,.22);
  --transition:.3s ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input,select{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(10,10,16,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:inline-flex;align-items:center;font-size:22px;font-weight:900;color:var(--text);letter-spacing:.5px}
.logo span{color:var(--primary-light)}
.logo-dot{width:10px;height:10px;background:var(--primary);border-radius:50%;display:inline-block;margin-right:8px;box-shadow:0 0 14px var(--primary)}
.main-nav{display:flex;gap:26px;align-items:center}
.main-nav a{color:var(--text-weak);font-size:15px;font-weight:500;transition:var(--transition);padding:8px 2px;border-bottom:2px solid transparent;line-height:1.4}
.main-nav a:hover{color:var(--text)}
.main-nav a.active{color:var(--primary-light);border-bottom-color:var(--primary)}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:44px;height:44px;align-items:center;justify-content:center;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:var(--transition)}
.nav-toggle:hover{border-color:var(--primary)}
.nav-toggle span{width:20px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.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)}

.hero{position:relative;min-height:82vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:150px 0 90px;overflow:hidden;background:linear-gradient(180deg,rgba(14,14,20,.52) 0%,rgba(14,14,20,.8) 74%,var(--bg) 100%),linear-gradient(135deg,rgba(232,53,108,.22) 0%,rgba(14,14,20,.42) 100%),url('/assets/images/backpic/back-1.webp') center/cover no-repeat}
.hero-content{max-width:880px;padding:0 20px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:9px 22px;border-radius:999px;background:rgba(232,53,108,.14);border:1px solid rgba(232,53,108,.5);color:var(--primary-light);font-size:14px;font-weight:600;letter-spacing:1px;margin-bottom:28px}
.hero-tag::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--primary-light);box-shadow:0 0 10px var(--primary-light)}
.hero-title{font-size:54px;line-height:1.22;font-weight:900;letter-spacing:1px;margin-bottom:22px}
.hero-title em{font-style:normal;background:linear-gradient(90deg,var(--primary-light),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:18px;color:var(--text-weak);max-width:680px;margin:0 auto 38px;line-height:1.85}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 34px;border-radius:999px;font-size:16px;font-weight:700;transition:var(--transition);border:2px solid transparent;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 28px rgba(232,53,108,.35)}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-3px);box-shadow:0 14px 36px rgba(232,53,108,.45)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:var(--text)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-3px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.hero-tags{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:42px}
.hero-tags span{padding:8px 18px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);font-size:14px;color:var(--text-weak);transition:var(--transition)}
.hero-tags span:hover{border-color:var(--primary);color:var(--text)}

.section{padding:96px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px}
.section-tag{display:inline-block;padding:7px 20px;border-radius:999px;background:rgba(232,53,108,.1);border:1px solid rgba(232,53,108,.4);color:var(--primary-light);font-size:13px;font-weight:600;letter-spacing:1.5px;margin-bottom:16px}
.section-title{font-size:38px;line-height:1.3;font-weight:900;margin-bottom:14px;letter-spacing:.5px}
.section-sub{color:var(--text-weak);font-size:17px;line-height:1.8}

.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:36px 28px;transition:var(--transition);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),transparent);opacity:0;transition:var(--transition)}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(232,53,108,.5);box-shadow:var(--shadow-hover)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:58px;height:58px;border-radius:16px;background:linear-gradient(135deg,rgba(232,53,108,.22),rgba(232,53,108,.05));display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:22px;border:1px solid rgba(232,53,108,.3)}
.feature-title{font-size:19px;font-weight:800;margin-bottom:10px}
.feature-text{color:var(--text-weak);font-size:15px;line-height:1.75}

.featured{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.featured-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.video-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:var(--transition);display:block}
.video-card:hover{transform:translateY(-8px);border-color:rgba(232,53,108,.55);box-shadow:var(--shadow-hover)}
.video-card:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.video-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#111}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.video-card:hover .video-thumb img{transform:scale(1.07)}
.video-badge{position:absolute;left:14px;bottom:14px;background:rgba(9,9,13,.78);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--border);border-radius:999px;padding:4px 13px;font-size:13px;font-weight:600;color:#fff}
.video-duration{position:absolute;right:14px;bottom:14px;background:rgba(9,9,13,.78);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--border);border-radius:999px;padding:4px 10px;font-size:12px;color:var(--text-weak)}
.video-info{padding:20px 22px 22px}
.video-title{font-size:17px;font-weight:700;margin-bottom:6px;line-height:1.5}
.video-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.video-tag{display:inline-block;padding:3px 12px;border-radius:999px;background:rgba(255,184,77,.12);border:1px solid rgba(255,184,77,.35);color:var(--accent);font-size:12px;font-weight:600}
.video-quality{display:inline-block;padding:3px 10px;border-radius:999px;background:rgba(232,53,108,.1);border:1px solid rgba(232,53,108,.35);color:var(--primary-light);font-size:12px;font-weight:600}

.stats{background:linear-gradient(180deg,var(--bg-deep),var(--bg-soft));border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item{padding:20px 10px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition)}
.stat-item:hover{border-color:rgba(232,53,108,.4);transform:translateY(-4px)}
.stat-num{font-size:52px;font-weight:900;color:var(--primary-light);line-height:1.2;letter-spacing:1px}
.stat-suffix{font-size:24px;color:var(--text)}
.stat-label{color:var(--text-weak);margin-top:8px;font-size:15px;letter-spacing:.5px}

.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.step-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:42px 30px;text-align:center;transition:var(--transition);position:relative}
.step-item:hover{transform:translateY(-6px);border-color:rgba(232,53,108,.45);box-shadow:var(--shadow-hover)}
.step-num{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:22px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;box-shadow:0 8px 24px rgba(232,53,108,.35)}
.step-title{font-size:20px;font-weight:800;margin-bottom:10px}
.step-text{color:var(--text-weak);font-size:15px;line-height:1.75}

.faq{background:var(--bg-soft);border-top:1px solid var(--border)}
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:var(--transition)}
.faq-item[open]{border-color:rgba(232,53,108,.45)}
.faq-item summary{cursor:pointer;padding:22px 26px;font-size:17px;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:var(--transition)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';color:var(--primary-light);font-size:26px;font-weight:300;transition:transform .3s ease;flex-shrink:0}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{background:rgba(232,53,108,.06)}
.faq-a{padding:0 26px 24px;color:var(--text-weak);line-height:1.9;font-size:15px}

.cta{padding:90px 0 120px}
.cta-box{background:linear-gradient(135deg,rgba(232,53,108,.93),rgba(160,18,62,.96)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;border-radius:28px;padding:74px 44px;text-align:center;color:#fff;position:relative;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.cta-box::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.12),transparent 50%)}
.cta-content{position:relative;z-index:1}
.cta-title{font-size:38px;font-weight:900;line-height:1.3;margin-bottom:14px}
.cta-sub{max-width:640px;margin:0 auto 34px;font-size:17px;opacity:.92;line-height:1.8}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-box .btn-primary{background:#fff;color:var(--primary);box-shadow:0 10px 30px rgba(0,0,0,.18)}
.cta-box .btn-primary:hover{background:var(--text);transform:translateY(-3px)}
.cta-box .btn-ghost{border-color:rgba(255,255,255,.7);color:#fff}
.cta-box .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}

.site-footer{background:var(--bg-deep);border-top:1px solid var(--border);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;padding-bottom:44px}
.footer-brand .logo{font-size:22px;margin-bottom:16px}
.footer-brand p{color:var(--text-weak);font-size:15px;line-height:1.85;max-width:320px}
.footer-col h4{font-size:16px;font-weight:700;margin-bottom:18px;color:var(--text)}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{color:var(--text-weak);font-size:14px;transition:var(--transition)}
.footer-col ul a:hover{color:var(--primary-light);padding-left:4px}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom p{color:var(--text-weak);font-size:13px}
.footer-bottom .tech-info{color:rgba(255,255,255,.28);font-size:12px}

@media (max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .featured-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:44px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .header-inner{height:64px}
  .main-nav{position:fixed;top:64px;left:0;right:0;background:rgba(10,10,16,.98);flex-direction:column;align-items:flex-start;padding:22px 28px;gap:16px;display:none;border-bottom:1px solid var(--border);backdrop-filter:blur(18px)}
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .hero{padding:120px 0 64px;min-height:auto}
  .hero-title{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-tags span{font-size:13px}
  .section{padding:70px 0}
  .section-title{font-size:28px}
  .section-sub{font-size:15px}
  .features-grid,.featured-grid,.steps-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .cta-box{padding:52px 24px}
  .cta-title{font-size:28px}
  .cta-sub{font-size:15px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-bottom{flex-direction:column;text-align:center;gap:6px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .hero-actions{flex-direction:column;width:100%;max-width:320px;margin:0 auto}
  .btn{width:100%}
  .stat-num{font-size:42px}
  .video-title{font-size:16px}
  .faq-item summary{font-size:15px;padding:18px 20px}
  .faq-a{padding:0 20px 20px;font-size:14px}
}

/* roulang page: category1 */
:root {
            --primary: #ff3b5c;
            --primary-rgb: 255, 59, 92;
            --primary-dark: #d62341;
            --accent: #ffd166;
            --accent-rgb: 255, 209, 102;
            --bg: #0a0c12;
            --bg-alt: #11141d;
            --card-bg: #161a24;
            --glass: rgba(22, 26, 36, 0.78);
            --text: #f2f3f7;
            --text-muted: #9aa1ad;
            --border: rgba(255, 255, 255, 0.08);
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
            --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.28);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
            border: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(var(--accent-rgb), 0.6);
            outline-offset: 3px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 32px rgba(var(--primary-rgb), 0.45);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(var(--primary-rgb), 0.3);
        }
        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(var(--primary-rgb), 0.08);
        }
        .btn-light {
            background: #fff;
            color: #111;
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(255, 255, 255, 0.2);
        }
        .btn-lg {
            padding: 17px 44px;
            font-size: 16px;
        }
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-head {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(var(--primary-rgb), 0.12);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 16px;
            border: 1px solid rgba(var(--primary-rgb), 0.25);
        }
        .section-head h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            color: var(--text);
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.7;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 12, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.02em;
        }
        .logo span {
            color: var(--primary);
        }
        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 16px rgba(var(--primary-rgb), 0.8);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a {
            display: block;
            padding: 10px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .main-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.05);
        }
        .main-nav a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.35);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .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);
        }
        .hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 140px 0 120px;
            isolation: isolate;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(10, 12, 18, 0.97) 0%, rgba(10, 12, 18, 0.82) 50%, rgba(10, 12, 18, 0.4) 100%);
            z-index: -1;
        }
        .hero-inner {
            display: flex;
            align-items: flex-start;
            justify-content: flex-start;
        }
        .hero-content {
            max-width: 680px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            background: rgba(var(--primary-rgb), 0.15);
            border: 1px solid rgba(var(--primary-rgb), 0.35);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 22px;
            letter-spacing: 0.04em;
        }
        .hero h1 {
            font-size: clamp(38px, 5.5vw, 60px);
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            color: #fff;
        }
        .hero h1 em {
            font-style: normal;
            color: var(--primary);
        }
        .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 34px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 50px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .stat {
            text-align: left;
        }
        .stat-num {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.1;
        }
        .stat-num small {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
        }
        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
            display: block;
            letter-spacing: 0.04em;
        }
        .stats-bar {
            border-bottom: 1px solid var(--border);
            background: var(--bg-alt);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 40px 0;
        }
        .stats-grid .stat {
            text-align: center;
            padding: 20px 16px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stats-grid .stat:hover {
            border-color: rgba(var(--primary-rgb), 0.4);
            background: rgba(var(--primary-rgb), 0.05);
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(var(--primary-rgb), 0.3);
        }
        .card-img {
            position: relative;
            height: 210px;
            overflow: hidden;
            background: #1e2230;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.06);
        }
        .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(10, 12, 18, 0.6) 100%);
        }
        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 14px;
            border-radius: 50px;
            background: rgba(255, 59, 92, 0.9);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .card-tag.hot {
            background: rgba(255, 59, 92, 0.9);
        }
        .card-tag.new {
            background: rgba(255, 209, 102, 0.9);
            color: #111;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 12px;
            color: #fff;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature {
            background: var(--card-bg);
            padding: 32px 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            text-align: left;
            transition: all var(--transition);
        }
        .feature:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
            border-color: rgba(var(--primary-rgb), 0.3);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.15), rgba(var(--primary-rgb), 0.05));
            border: 1px solid rgba(var(--primary-rgb), 0.2);
            margin-bottom: 18px;
        }
        .feature h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .feature p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scene {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 260px;
            display: flex;
            align-items: flex-end;
            isolation: isolate;
        }
        .scene img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -2;
            transition: transform 0.5s ease;
        }
        .scene::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(10, 12, 18, 0.9) 100%);
            z-index: -1;
        }
        .scene:hover img {
            transform: scale(1.05);
        }
        .scene-body {
            padding: 26px;
            width: 100%;
        }
        .scene-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .scene-body p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.5;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step {
            text-align: center;
            padding: 40px 28px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }
        .step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .step::before {
            counter-increment: step;
            content: "0" counter(step);
            display: block;
            font-size: 44px;
            font-weight: 900;
            color: rgba(var(--primary-rgb), 0.25);
            line-height: 1;
            margin-bottom: 20px;
        }
        .step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(var(--primary-rgb), 0.3);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }
        .faq-q::after {
            content: "+";
            font-size: 26px;
            font-weight: 400;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q::after {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.75;
        }
        .faq-item.open .faq-a {
            max-height: 400px;
            padding: 0 26px 22px;
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(255, 59, 92, 0.15), rgba(255, 59, 92, 0.04));
            border: 1px solid rgba(var(--primary-rgb), 0.25);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(var(--primary-rgb), 0.12);
            filter: blur(60px);
        }
        .cta-box h2 {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--text);
            position: relative;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.7;
            position: relative;
        }
        .cta-box .btn {
            position: relative;
        }
        .site-footer {
            background: #080a0e;
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom .tech-info {
            font-size: 12px;
            opacity: 0.7;
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
                z-index: 101;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 12, 18, 0.97);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 10px 24px 20px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s ease;
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .main-nav a {
                padding: 14px 12px;
                border-radius: 8px;
                font-size: 15px;
            }
            .hero {
                padding: 80px 0 60px;
            }
            .hero-stats {
                gap: 24px;
            }
            .section {
                padding: 60px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenes-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-num {
                font-size: 26px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box .btn {
                width: 100%;
            }
        }

.section-alt {
            background: #14161d;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

/* roulang page: category5 */
:root{
  --primary:#ff2d78;
  --primary-dark:#d61f60;
  --primary-light:#ff6ba0;
  --accent:#8b5cf6;
  --accent-dark:#6d3fd6;
  --bg:#0b0812;
  --bg-deep:#07050d;
  --bg-soft:#14101f;
  --bg-card:#1a1528;
  --bg-card-hover:#221c36;
  --text:#f5f1fa;
  --text-soft:#cfc6dd;
  --text-muted:#978daa;
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.14);
  --radius:16px;
  --radius-sm:10px;
  --radius-lg:24px;
  --shadow:0 12px 40px rgba(0,0,0,.45);
  --shadow-hover:0 20px 50px rgba(255,45,120,.15);
  --transition:all .3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Helvetica Neue","Microsoft YaHei",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul{list-style:none}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-tag{
  display:inline-block;padding:6px 18px;border-radius:100px;
  font-size:13px;letter-spacing:.12em;color:var(--primary-light);
  background:rgba(255,45,120,.1);border:1px solid rgba(255,45,120,.25);
  margin-bottom:16px;font-weight:600;
}
.section-title{
  font-size:clamp(28px,4vw,40px);line-height:1.25;font-weight:800;
  letter-spacing:-.02em;margin-bottom:16px;
}
.section-sub{color:var(--text-soft);font-size:16px;line-height:1.9}
/* header */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(11,8,18,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:22px;font-weight:800;letter-spacing:.02em;
}
.logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 12px rgba(255,45,120,.6);
}
.logo span{color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  padding:8px 14px;border-radius:100px;font-size:14px;font-weight:500;
  color:var(--text-soft);white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.main-nav a.active{
  color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 4px 18px rgba(255,45,120,.3);
}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
/* hero */
.hero{
  position:relative;min-height:560px;display:flex;align-items:center;
  background:linear-gradient(135deg,rgba(11,8,18,.92),rgba(20,16,31,.78)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding:100px 0;overflow:hidden;
}
.hero::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:120px;
  background:linear-gradient(to bottom,transparent,var(--bg));
}
.hero-inner{position:relative;z-index:2;max-width:780px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 20px;border-radius:100px;font-size:13px;font-weight:600;
  color:var(--primary-light);background:rgba(255,45,120,.1);
  border:1px solid rgba(255,45,120,.3);margin-bottom:24px;
}
.hero-badge::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--primary);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(255,45,120,.5)}50%{opacity:.7;box-shadow:0 0 0 8px rgba(255,45,120,0)}}
.hero h1{
  font-size:clamp(34px,5.6vw,58px);font-weight:900;line-height:1.15;
  letter-spacing:-.02em;margin-bottom:20px;
}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:18px;color:var(--text-soft);line-height:1.9;margin-bottom:36px;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:100px;font-size:15px;font-weight:700;
  border:none;cursor:pointer;transition:var(--transition);white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 28px rgba(255,45,120,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(255,45,120,.5)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--text);border:1px solid var(--border-strong)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:var(--primary-light);transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.98)}
.hero-stats{
  display:flex;gap:40px;margin-top:48px;flex-wrap:wrap;
  padding-top:32px;border-top:1px solid var(--border);
}
.hero-stats .num{font-size:30px;font-weight:800;color:#fff;line-height:1.2}
.hero-stats .num span{color:var(--primary-light);font-size:20px;margin-right:2px}
.hero-stats .label{font-size:13px;color:var(--text-muted);margin-top:4px}
/* feature */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px 28px;transition:var(--transition);position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:var(--transition);
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);background:var(--bg-card-hover);border-color:var(--border-strong)}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(255,45,120,.15),rgba(139,92,246,.15));
  border:1px solid rgba(255,45,120,.2);margin-bottom:20px;
}
.feature-icon svg{width:26px;height:26px;stroke:var(--primary-light)}
.feature-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.feature-card p{color:var(--text-soft);font-size:14px;line-height:1.8}
/* scene */
.scene-section{background:var(--bg-deep);position:relative;overflow:hidden}
.scene-section::before{
  content:'';position:absolute;top:-140px;right:-140px;width:440px;height:440px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,45,120,.12),transparent 70%);
}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  min-height:320px;display:flex;align-items:flex-end;cursor:pointer;
  box-shadow:0 8px 30px rgba(0,0,0,.4);transition:var(--transition);
}
.scene-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.scene-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.scene-card:hover img{transform:scale(1.06)}
.scene-card::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(7,5,13,.9) 0%,rgba(7,5,13,.2) 60%,rgba(7,5,13,.1) 100%);
}
.scene-card-body{position:relative;z-index:2;padding:28px;width:100%}
.scene-card-body .tag{
  display:inline-block;padding:4px 14px;border-radius:100px;font-size:12px;
  background:rgba(255,45,120,.25);color:#fff;border:1px solid rgba(255,255,255,.15);
  margin-bottom:10px;font-weight:600;
}
.scene-card-body h3{font-size:20px;font-weight:700;margin-bottom:6px}
.scene-card-body p{font-size:13px;color:var(--text-soft);line-height:1.7}
/* gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.gallery-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:14px 14px 20px;transition:var(--transition);
}
.gallery-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--border-strong);background:var(--bg-card-hover)}
.gallery-card .thumb{position:relative;border-radius:var(--radius-sm);overflow:hidden;margin-bottom:14px;aspect-ratio:1/1}
.gallery-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.gallery-card:hover .thumb img{transform:scale(1.05)}
.gallery-card .thumb::after{
  content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.35),transparent 50%);
}
.gallery-card .meta{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.gallery-card .meta .badge{
  padding:3px 10px;border-radius:100px;font-size:11px;font-weight:600;
  background:rgba(139,92,246,.2);color:var(--primary-light);
}
.gallery-card .meta .badge.hot{background:rgba(255,45,120,.2);color:var(--primary-light)}
.gallery-card h4{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:6px}
.gallery-card .views{font-size:13px;color:var(--text-muted)}
/* quote */
.quote-section{background:linear-gradient(135deg,rgba(11,8,18,.96),rgba(20,16,31,.92)),url('/assets/images/backpic/back-3.webp') center/cover fixed}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{
  background:rgba(26,21,40,.85);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;backdrop-filter:blur(10px);transition:var(--transition);
}
.quote-card:hover{transform:translateY(-4px);border-color:rgba(255,45,120,.3)}
.quote-card .stars{color:#ffc64b;font-size:18px;letter-spacing:2px;margin-bottom:14px}
.quote-card p{font-size:14px;color:var(--text-soft);line-height:1.9;font-style:italic}
.quote-card .user{display:flex;align-items:center;gap:12px;margin-top:20px}
.quote-card .avatar{
  width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--accent));
}
.quote-card .user .name{font-size:14px;font-weight:600}
.quote-card .user .role{font-size:12px;color:var(--text-muted)}
/* faq */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  margin-bottom:16px;overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:var(--border-strong)}
.faq-q{
  display:flex;align-items:center;gap:14px;padding:22px 26px;cursor:pointer;
  font-size:16px;font-weight:600;
}
.faq-q .icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:rgba(255,45,120,.15);display:flex;align-items:center;justify-content:center;
  transition:var(--transition);font-size:14px;color:var(--primary-light);
}
.faq-q.open .icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .4s ease;
  padding:0 26px;color:var(--text-soft);font-size:14px;line-height:1.9;
}
.faq-a.open{max-height:400px;padding:0 26px 24px}
/* cta */
.cta-section{position:relative;padding:90px 0;text-align:center;overflow:hidden}
.cta-section::before{
  content:'';position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.webp') center/cover;
  filter:brightness(.35);z-index:1;
}
.cta-section::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(255,45,120,.15),rgba(139,92,246,.15));
  z-index:2;
}
.cta-inner{position:relative;z-index:3}
.cta-inner h2{font-size:clamp(28px,4vw,40px);font-weight:800;margin-bottom:16px}
.cta-inner p{color:var(--text-soft);max-width:560px;margin:0 auto 32px;font-size:16px}
/* footer */
.site-footer{
  background:var(--bg-deep);border-top:1px solid var(--border);padding:64px 0 32px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{font-size:20px;margin-bottom:16px}
.footer-brand p{color:var(--text-muted);font-size:13px;line-height:1.9;max-width:320px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:#fff}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:var(--text-muted);font-size:13px;transition:var(--transition)}
.footer-col a:hover{color:var(--primary-light);padding-left:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  padding-top:28px;border-top:1px solid var(--border);
}
.footer-bottom p{font-size:13px;color:var(--text-muted)}
.footer-bottom .tech-info{color:rgba(255,255,255,.35)}
/* responsive */
@media(max-width:1024px){
  .feature-grid,.scene-grid,.gallery-grid,.quote-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:72px;left:0;right:0;flex-direction:column;
    background:var(--bg-soft);padding:16px 24px;gap:4px;
    transform:translateY(-120%);opacity:0;pointer-events:none;
    transition:var(--transition);border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);
  }
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav a{display:block;padding:12px 16px;border-radius:var(--radius-sm)}
  .hero{min-height:480px;padding:70px 0}
  .hero p{font-size:16px}
  .hero-stats{gap:24px}
  .hero-stats .num{font-size:24px}
  .feature-grid,.scene-grid,.gallery-grid,.quote-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:30px}
  .hero-actions .btn{width:100%}
  .btn{justify-content:center}
  .section-title{font-size:26px}
  .footer-grid{gap:24px}
}

/* roulang page: category4 */
:root {
    --bg: #0d0f1a;
    --bg-soft: #141827;
    --surface: #1a1e31;
    --surface-hover: #222840;
    --text: #f2f4ff;
    --text-muted: #9aa7c7;
    --border: rgba(255, 255, 255, 0.08);
    --primary: #ff2d55;
    --primary-dark: #d61f44;
    --primary-soft: rgba(255, 45, 85, 0.12);
    --accent: #ff8fa8;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.25);
    --container: 1200px;
    --spacer: 96px;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
button {
    font-family: inherit;
    cursor: pointer;
}
.container {
    width: min(var(--container), 100% - 48px);
    margin: 0 auto;
}

/* ========== Header ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 15, 26, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    white-space: nowrap;
}
.logo span {
    color: var(--primary);
}
.logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 16px var(--primary);
    flex-shrink: 0;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.main-nav a {
    font-size: 15px;
    color: var(--text-muted);
    padding: 8px 2px;
    position: relative;
    transition: color 0.25s ease;
    white-space: nowrap;
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.25s ease;
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--text);
}
.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ========== Hero ========== */
.hero {
    position: relative;
    padding: 120px 0 110px;
    background: linear-gradient(135deg, rgba(13, 15, 26, 0.94), rgba(20, 24, 39, 0.82)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}
.hero::after {
    content: "";
    position: absolute;
    right: -160px;
    top: 60px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(255, 45, 85, 0.22), transparent 68%);
    border-radius: 50%;
    pointer-events: none;
}
.hero-inner {
    position: relative;
    z-index: 2;
    max-width: 820px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-soft);
    border: 1px solid rgba(255, 45, 85, 0.3);
    color: var(--accent);
    font-size: 14px;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 22px;
}
.hero-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}
.hero h1 {
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.2;
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: 1px;
}
.hero-sub {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 640px;
    margin-bottom: 32px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 999px;
    border: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 30px rgba(255, 45, 85, 0.3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(255, 45, 85, 0.4);
}
.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.09);
    transform: translateY(-2px);
}
.btn-lg {
    padding: 16px 42px;
    font-size: 16px;
}
.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ========== Section ========== */
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 50px;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--primary-soft);
    border: 1px solid rgba(255, 45, 85, 0.2);
    padding: 5px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
}
.section-head h2 {
    font-size: clamp(26px, 3.4vw, 38px);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
}
.section-head p {
    color: var(--text-muted);
    font-size: 16px;
}
section[id] {
    scroll-margin-top: 80px;
}

/* ========== Features ========== */
.features {
    padding: var(--spacer) 0;
    background: var(--bg);
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}
.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    background: var(--surface-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}
.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: var(--primary-soft);
    border: 1px solid rgba(255, 45, 85, 0.2);
    margin-bottom: 18px;
}
.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.feature-card p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.65;
}

/* ========== Categories ========== */
.categories {
    padding: var(--spacer) 0;
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.cate-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.cate-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--surface);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.cate-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: rgba(255, 45, 85, 0.35);
}
.cate-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.cate-card:hover img {
    transform: scale(1.05);
}
.cate-info {
    padding: 22px 22px 26px;
}
.cate-info h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 8px;
}
.cate-info p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
}
.cate-link {
    display: inline-flex;
    align-items: center;
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    margin-top: 14px;
    transition: gap 0.3s ease;
}
.cate-link:hover {
    gap: 4px;
}

/* ========== Stats ========== */
.stats {
    padding: 70px 0;
    background: linear-gradient(135deg, #1a1e31, #141827);
    border-bottom: 1px solid var(--border);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}
.stat-item {
    padding: 20px 10px;
    border-right: 1px solid var(--border);
}
.stat-item:last-child {
    border-right: none;
}
.stat-num {
    font-size: 38px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1.2;
}
.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ========== Scenes ========== */
.scenes {
    padding: var(--spacer) 0;
    background: var(--bg);
}
.scene-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.scene-card {
    background: linear-gradient(145deg, var(--surface), var(--bg-soft));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.scene-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}
.scene-emoji {
    font-size: 36px;
    margin-bottom: 16px;
}
.scene-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
}
.scene-card p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
}

/* ========== Steps ========== */
.steps {
    padding: var(--spacer) 0;
    background: var(--bg-soft);
    border-top: 1px solid var(--border);
}
.step-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    counter-reset: step;
}
.step-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 42px 28px 30px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.step-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}
.step-card::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 6px var(--bg-soft);
}
.step-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.step-card p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.65;
}

/* ========== FAQ ========== */
.faq {
    padding: var(--spacer) 0;
    background: var(--bg);
}
.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color 0.3s ease, background 0.3s ease;
}
.faq-item:hover {
    border-color: rgba(255, 45, 85, 0.3);
}
.faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::after {
    content: "+";
    font-size: 22px;
    font-weight: 400;
    color: var(--accent);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}
.faq-item[open] summary::after {
    transform: rotate(45deg);
}
.faq-answer {
    padding: 0 24px 22px;
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.75;
}

/* ========== CTA ========== */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(255, 45, 85, 0.18), rgba(13, 15, 26, 0.9)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    border-top: 1px solid var(--border);
}
.cta-inner {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}
.cta h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 900;
    margin-bottom: 16px;
}
.cta p {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 30px;
}

/* ========== Footer ========== */
.site-footer {
    background: #0a0c14;
    border-top: 1px solid var(--border);
    padding: 64px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 14px;
    max-width: 340px;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 10px;
}
.footer-col a {
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.25s ease;
}
.footer-col a:hover {
    color: var(--accent);
}
.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 13px;
}
.tech-info {
    opacity: 0.7;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cate-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    .stat-item {
        border-right: none;
    }
    .scene-grid,
    .step-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(13, 15, 26, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        z-index: 99;
    }
    .main-nav.open {
        transform: translateY(0);
    }
    .main-nav a {
        width: 100%;
        padding: 14px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        font-size: 16px;
    }
    .main-nav a::after {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .hero {
        padding: 80px 0 70px;
    }
    .hero-sub {
        font-size: 15px;
    }
    .cate-grid {
        grid-template-columns: 1fr;
    }
    .scene-grid,
    .step-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
@media (max-width: 520px) {
    .container {
        width: calc(100% - 32px);
    }
    .feature-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 30px;
    }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn {
        width: 100%;
    }
    .stats-grid {
        gap: 24px;
    }
    .stat-item {
        border-bottom: 1px solid var(--border);
        padding-bottom: 18px;
    }
    .stat-item:last-child {
        border-bottom: none;
    }
}