/* roulang page: index */
:root {
  --primary: #FFC107;
  --primary-light: #FFF4D6;
  --primary-dark: #E5AC00;
  --secondary: #FF7F2A;
  --secondary-light: #FFA366;
  --dark: #1F2A3A;
  --dark-deep: #101216;
  --dark-medium: #24262B;
  --text-primary: #2B2B2B;
  --text-secondary: #6B6B6B;
  --text-light: #9B9B9B;
  --text-white: #FFFFFF;
  --text-white-70: rgba(255,255,255,.7);
  --bg-body: #FAF8F3;
  --bg-card: #FFFFFF;
  --bg-light: #F5F2EC;
  --border: #EDE8DF;
  --border-dark: #D8D0C2;
  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 6px rgba(0,0,0,.03);
  --shadow: 0 2px 10px rgba(0,0,0,.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,.10);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.12);
  --section-padding: 96px 0;
  --section-padding-mobile: 64px 0;
  --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num: "Inter","Roboto",sans-serif;
  --transition: all .3s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.75;
  color:var(--text-primary);
  background:var(--bg-body);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--text-primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary)}
button{font-family:inherit}
.container-xl{max-width:1200px}
.section{padding:var(--section-padding)}
@media(max-width:768px){.section{padding:var(--section-padding-mobile)}}

/* 导航 */
.main-nav{
  background:var(--dark)!important;
  padding:0;
  position:sticky;
  top:0;
  z-index:1050;
  min-height:72px;
  box-shadow:0 1px 0 rgba(255,255,255,.06);
}
.main-nav .navbar-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.1rem;
  font-weight:700;
  color:var(--text-white);
  padding:12px 0;
}
.brand-icon{
  width:36px;
  height:36px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.1rem;
  color:var(--dark);
  box-shadow:0 2px 8px rgba(255,193,7,.3);
}
.main-nav .navbar-nav{gap:6px}
.main-nav .nav-link{
  color:var(--text-white-70);
  font-size:.95rem;
  font-weight:500;
  padding:24px 14px;
  position:relative;
  transition:var(--transition);
  border-bottom:3px solid transparent;
}
.main-nav .nav-link:hover{
  color:var(--text-white);
  border-bottom-color:rgba(255,255,255,.3);
}
.main-nav .nav-link.active{
  color:var(--primary);
  border-bottom-color:var(--primary);
}
.nav-actions .nav-btn{
  background:var(--primary);
  color:var(--dark);
  border:none;
  padding:8px 20px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:.9rem;
  transition:var(--transition);
  white-space:nowrap;
}
.nav-actions .nav-btn:hover{
  background:var(--secondary);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 4px 12px rgba(255,127,42,.3);
}
@media(max-width:991px){
  .main-nav .navbar-collapse{
    background:var(--dark);
    padding:16px;
    border-radius:0 0 12px 12px;
    border-top:1px solid rgba(255,255,255,.08);
  }
  .main-nav .nav-link{
    padding:14px 12px;
    border-bottom:1px solid rgba(255,255,255,.05);
    border-left:3px solid transparent;
  }
  .main-nav .nav-link.active{
    border-left-color:var(--primary);
    border-bottom-color:transparent;
    background:rgba(255,255,255,.04);
  }
  .nav-actions{margin-top:12px}
}
.navbar-toggler{border-color:rgba(255,255,255,.38)}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(255,193,7,.25)}
.navbar-toggler-icon{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e")!important;
}

/* Hero */
.hero-section{
  position:relative;
  background:var(--bg-body);
  padding:80px 0 72px;
  overflow:hidden;
}
.hero-section::before{
  content:"";
  position:absolute;
  top:-180px;
  right:-120px;
  width:560px;
  height:560px;
  background:radial-gradient(circle,rgba(255,193,7,.18) 0%,transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.hero-section::after{
  content:"";
  position:absolute;
  bottom:-120px;
  left:-80px;
  width:360px;
  height:360px;
  background:radial-gradient(circle,rgba(255,127,42,.12) 0%,transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.hero-content{position:relative;z-index:2}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--primary);
  color:var(--dark);
  padding:6px 18px;
  border-radius:var(--radius-pill);
  font-size:.85rem;
  font-weight:600;
  margin-bottom:20px;
  box-shadow:0 2px 10px rgba(255,193,7,.3);
}
.hero-badge i{font-size:1rem}
.hero-title{
  font-size:clamp(2rem,4vw,3rem);
  line-height:1.25;
  font-weight:800;
  margin-bottom:20px;
  color:var(--text-primary);
  letter-spacing:-.01em;
}
.hero-title .accent{color:var(--secondary)}
.hero-desc{
  font-size:1.05rem;
  color:var(--text-secondary);
  max-width:600px;
  line-height:1.8;
  margin-bottom:32px;
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn-hero-primary{
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:var(--dark);
  border:none;
  padding:13px 30px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:1rem;
  transition:var(--transition);
  box-shadow:0 4px 14px rgba(255,127,42,.25);
}
.btn-hero-primary:hover{
  background:linear-gradient(135deg,var(--secondary),var(--primary));
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 6px 20px rgba(255,127,42,.35);
}
.btn-hero-secondary{
  background:transparent;
  border:1.5px solid var(--dark);
  color:var(--dark);
  padding:12px 28px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:1rem;
  transition:var(--transition);
}
.btn-hero-secondary:hover{
  background:var(--dark);
  color:var(--text-white);
  transform:translateY(-2px);
}
.btn:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
}
.hero-icons{
  display:flex;
  gap:32px;
  flex-wrap:wrap;
  margin-bottom:44px;
}
.hero-icon-item{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  text-align:center;
}
.icon-circle{
  width:56px;
  height:56px;
  border-radius:16px;
  background:var(--primary-light);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.4rem;
  color:var(--dark);
  transition:var(--transition);
  border:1px solid rgba(255,193,7,.3);
}
.hero-icon-item:hover .icon-circle{
  background:var(--primary);
  transform:translateY(-3px);
  box-shadow:0 6px 16px rgba(255,193,7,.3);
}
.hero-icon-item span{
  font-size:.85rem;
  font-weight:600;
  color:var(--text-secondary);
}
.hero-status{
  display:flex;
  gap:0;
  background:var(--dark);
  border-radius:var(--radius-lg);
  padding:28px 32px;
  flex-wrap:wrap;
  box-shadow:var(--shadow-lg);
  position:relative;
  z-index:2;
}
.status-item{
  flex:1;
  text-align:center;
  padding:0 20px;
  border-right:1px solid rgba(255,255,255,.1);
}
.status-item:last-child{border-right:none}
.status-num{
  display:block;
  font-family:var(--font-num);
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  color:var(--primary);
  line-height:1.2;
}
.status-label{
  display:block;
  color:var(--text-white-70);
  font-size:.85rem;
  margin-top:6px;
  letter-spacing:.02em;
}
@media(max-width:576px){
  .hero-status{padding:20px 12px}
  .status-item{padding:0 10px}
  .status-num{font-size:1.3rem}
}

/* 合集目录 */
.directory-section{background:var(--bg-card)}
.section-tag{
  display:inline-block;
  background:var(--primary-light);
  color:var(--dark);
  padding:4px 14px;
  border-radius:var(--radius-pill);
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.02em;
  margin-bottom:12px;
}
.section-title{
  font-size:clamp(1.6rem,2.8vw,2.4rem);
  font-weight:700;
  line-height:1.3;
  margin-bottom:16px;
  color:var(--text-primary);
}
.section-desc{
  color:var(--text-secondary);
  font-size:.95rem;
  line-height:1.75;
  max-width:480px;
  margin-bottom:24px;
}
.btn-outline-dark{
  border:1.5px solid var(--dark);
  color:var(--dark);
  background:transparent;
  padding:10px 24px;
  border-radius:var(--radius-sm);
  font-weight:600;
  transition:var(--transition);
}
.btn-outline-dark:hover{
  background:var(--dark);
  color:var(--text-white);
  border-color:var(--dark);
}
.category-card{
  display:block;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:var(--transition);
  height:100%;
}
.category-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--primary);
}
.category-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
}
.category-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.category-card:hover .category-cover img{transform:scale(1.05)}
.category-num{
  position:absolute;
  top:12px;
  left:12px;
  background:rgba(31,42,58,.85);
  color:var(--primary);
  font-family:var(--font-num);
  font-size:.8rem;
  font-weight:700;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  backdrop-filter:blur(4px);
}
.category-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top,rgba(16,18,22,.3),transparent 40%);
}
.category-body{padding:20px 20px 22px}
.category-body h3{
  font-size:1.15rem;
  font-weight:700;
  margin-bottom:8px;
  color:var(--text-primary);
}
.category-body p{
  font-size:.88rem;
  color:var(--text-secondary);
  line-height:1.7;
  margin:0;
}

/* 相关推荐 */
.recommend-section{background:var(--bg-light)}
.recommend-wrap{display:flex;gap:24px;overflow-x:auto;padding-bottom:10px;scroll-snap-type:x mandatory}
.recommend-wrap::-webkit-scrollbar{height:6px}
.recommend-wrap::-webkit-scrollbar-track{background:transparent}
.recommend-wrap::-webkit-scrollbar-thumb{background:rgba(0,0,0,.2);border-radius:99px}
.recommend-wrap::-webkit-scrollbar-thumb:hover{background:var(--primary)}
.recommend-col{
  flex:0 0 calc(33.333% - 16px);
  scroll-snap-align:start;
}
@media(max-width:992px){
  .recommend-col{flex:0 0 calc(50% - 12px)}
}
@media(max-width:640px){
  .recommend-col{flex:0 0 85%}
}
.recommend-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:var(--transition);
  height:100%;
  display:flex;
  flex-direction:column;
}
.recommend-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
}
.recommend-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
}
.recommend-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.recommend-card:hover .recommend-cover img{transform:scale(1.04)}
.recommend-tag{
  position:absolute;
  top:12px;
  right:12px;
  background:rgba(16,18,22,.75);
  color:var(--primary);
  font-size:.75rem;
  font-weight:600;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  backdrop-filter:blur(4px);
  letter-spacing:.02em;
}
.recommend-body{
  padding:20px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.recommend-body h3{
  font-size:1.1rem;
  font-weight:700;
  margin-bottom:8px;
}
.recommend-body p{
  font-size:.88rem;
  color:var(--text-secondary);
  line-height:1.65;
  margin-bottom:16px;
  flex:1;
}
.recommend-link{
  color:var(--secondary);
  font-weight:600;
  font-size:.88rem;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:var(--transition);
}
.recommend-link i{transition:transform .3s}
.recommend-link:hover{color:var(--primary)}
.recommend-link:hover i{transform:translateX(4px)}

/* 资讯 */
.news-section{background:var(--bg-card)}
.news-list{
  list-style:none;
  padding:0;
  margin:0;
}
.news-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 0 18px 24px;
  border-left:3px solid var(--border);
  border-bottom:1px solid rgba(0,0,0,.04);
  transition:var(--transition);
}
.news-item:hover{
  border-left-color:var(--primary);
  background:rgba(255,193,7,.03);
  padding-left:30px;
}
.news-item:last-child{border-bottom:none}
.news-title{
  font-size:.95rem;
  font-weight:500;
  color:var(--text-primary);
  transition:var(--transition);
  flex:1;
}
.news-title:hover{color:var(--secondary)}
.news-date{
  font-size:.8rem;
  color:var(--text-light);
  font-family:var(--font-num);
  white-space:nowrap;
  margin-left:16px;
}
.news-sidebar{
  background:var(--bg-light);
  border-radius:var(--radius);
  padding:28px;
  border:1px solid var(--border);
}
.sidebar-title{
  font-size:1.05rem;
  font-weight:700;
  margin-bottom:18px;
  padding-bottom:12px;
  border-bottom:2px solid var(--primary);
}
.tag-cloud{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.tag-item{
  display:inline-block;
  background:var(--bg-card);
  border:1px solid var(--border);
  padding:5px 14px;
  border-radius:var(--radius-pill);
  font-size:.8rem;
  color:var(--text-secondary);
  font-weight:500;
  transition:var(--transition);
  cursor:pointer;
}
.tag-item:hover{
  background:var(--primary);
  color:var(--dark);
  border-color:var(--primary);
}
.sidebar-list{
  list-style:none;
  padding:0;
  margin:0 0 24px;
}
.sidebar-list li{
  padding:10px 0;
  border-bottom:1px dashed var(--border);
  display:flex;
  align-items:center;
  gap:10px;
  font-size:.9rem;
  color:var(--text-primary);
  transition:var(--transition);
  cursor:pointer;
}
.sidebar-list li i{color:var(--secondary);font-size:.75rem}
.sidebar-list li:hover{color:var(--secondary);padding-left:4px}

/* 收藏分享 */
.collect-section{
  background:
    linear-gradient(135deg,rgba(31,42,58,.92) 0%,rgba(16,18,22,.88) 100%),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  color:var(--text-white);
}
.collect-inner{
  display:flex;
  gap:60px;
  align-items:center;
}
.collect-content{flex:1}
.collect-content .section-tag{
  background:rgba(255,193,7,.2);
  color:var(--primary);
}
.collect-content .section-title{color:var(--text-white)}
.collect-content .section-desc{color:var(--text-white-70)}
.collect-features{
  list-style:none;
  padding:0;
  margin:0;
}
.collect-features li{
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px 0;
  font-size:.95rem;
  color:rgba(255,255,255,.85);
}
.collect-features li i{
  width:38px;
  height:38px;
  border-radius:10px;
  background:rgba(255,193,7,.18);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.1rem;
  flex-shrink:0;
}
.collect-demo{
  flex:0 0 340px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-lg);
  padding:28px;
  backdrop-filter:blur(10px);
}
.demo-header{
  display:flex;
  align-items:center;
  gap:10px;
  padding-bottom:16px;
  border-bottom:1px solid rgba(255,255,255,.1);
  font-weight:600;
  font-size:1rem;
}
.demo-header i{color:var(--primary);font-size:1.2rem}
.demo-list{
  list-style:none;
  padding:0;
  margin:16px 0 0;
}
.demo-list li{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 0;
  font-size:.88rem;
  color:rgba(255,255,255,.8);
}
.demo-list li i{color:var(--secondary);font-size:.8rem}
@media(max-width:768px){
  .collect-inner{flex-direction:column;gap:32px}
  .collect-demo{flex:1 1 auto;width:100%}
}

/* FAQ */
.faq-section{background:var(--bg-light)}
.faq-wrap{max-width:780px;margin:0 auto}
.faq-wrap .accordion-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius)!important;
  margin-bottom:16px;
  overflow:hidden;
  transition:var(--transition);
}
.faq-wrap .accordion-item:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(255,193,7,.12);
}
.faq-wrap .accordion-button{
  background:var(--bg-card);
  color:var(--text-primary);
  font-weight:600;
  font-size:1rem;
  padding:20px 24px;
  box-shadow:none;
  border:none;
}
.faq-wrap .accordion-button:not(.collapsed){
  background:var(--bg-card);
  color:var(--text-primary);
}
.faq-wrap .accordion-button::after{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FFC107'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transition:var(--transition);
}
.faq-wrap .accordion-button:not(.collapsed)::after{
  transform:rotate(-180deg);
}
.faq-wrap .accordion-question{
  display:flex;
  align-items:center;
  gap:14px;
}
.faq-q-icon{
  width:32px;
  height:32px;
  border-radius:50%;
  background:var(--primary);
  color:var(--dark);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.9rem;
  font-weight:700;
  flex-shrink:0;
}
.faq-wrap .accordion-body{
  padding:0 24px 24px;
  border-top:1px solid var(--border);
  background:var(--bg-body);
}
.faq-wrap .accordion-body p{
  margin:16px 0 0;
  line-height:1.8;
  font-size:.93rem;
  color:var(--text-secondary);
}

/* Footer */
.site-footer{
  background:var(--dark-deep);
  color:rgba(255,255,255,.7);
  padding-top:64px;
  font-size:.9rem;
}
.footer-main{
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.1rem;
  font-weight:700;
  color:var(--text-white);
  margin-bottom:16px;
}
.footer-brand .brand-icon{
  width:32px;
  height:32px;
  font-size:.95rem;
}
.footer-about{
  color:rgba(255,255,255,.6);
  line-height:1.7;
  margin-bottom:20px;
  font-size:.85rem;
}
.footer-social{
  display:flex;
  gap:12px;
}
.footer-social a{
  width:36px;
  height:36px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.15);
  color:rgba(255,255,255,.7);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  transition:var(--transition);
}
.footer-social a:hover{
  background:var(--primary);
  color:var(--dark);
  border-color:var(--primary);
  transform:translateY(-2px);
}
.footer-title{
  font-size:.95rem;
  font-weight:700;
  color:var(--text-white);
  margin-bottom:16px;
  position:relative;
  padding-bottom:10px;
}
.footer-title::after{
  content:"";
  position:absolute;
  bottom:0;
  left:0;
  width:24px;
  height:3px;
  background:var(--primary);
  border-radius:99px;
}
.footer-links{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-links li{margin-bottom:10px}
.footer-links a{
  color:rgba(255,255,255,.6);
  font-size:.88rem;
  transition:var(--transition);
}
.footer-links a:hover{
  color:var(--primary);
  padding-left:4px;
}
.footer-copyright{
  padding:24px 0;
  font-size:.8rem;
  color:rgba(255,255,255,.4);
  text-align:center;
}
.footer-copyright a{
  color:rgba(255,255,255,.5);
  text-decoration:underline;
}
.footer-copyright a:hover{color:var(--primary)}
@media(max-width:768px){
  .footer-main .col-lg-3{margin-bottom:32px}
}

/* 通用状态 */
::selection{background:var(--primary);color:var(--dark)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(0,0,0,.2);border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:var(--primary)}
.section-header{
  margin-bottom:48px;
}
@media(max-width:768px){
  .hero-title{font-size:1.8rem}
  .hero-desc{font-size:.95rem}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%;text-align:center}
  .hero-icons{gap:20px;justify-content:center}
  .icon-circle{width:48px;height:48px;font-size:1.2rem}
  .section-desc{font-size:.9rem}
}

/* roulang page: category1 */
:root{
--primary:#FFC107;--primary-light:#FFF4D6;--primary-dark:#E5AC00;
--secondary:#FF7F2A;--secondary-light:#FFA366;
--dark:#1F2A3A;--dark-deep:#101216;--dark-medium:#24262B;
--text-primary:#2B2B2B;--text-secondary:#6B6B6B;--text-light:#9B9B9B;
--text-white:#FFFFFF;--text-white-70:rgba(255,255,255,.7);
--bg-body:#FAF8F3;--bg-card:#FFFFFF;--bg-light:#F5F2EC;
--border:#EDE8DF;--border-dark:#D8D0C2;
--radius-lg:16px;--radius:12px;--radius-sm:8px;--radius-pill:999px;
--shadow-sm:0 2px 6px rgba(0,0,0,.03);--shadow:0 2px 10px rgba(0,0,0,.04);
--shadow-hover:0 8px 24px rgba(0,0,0,.10);--shadow-lg:0 12px 32px rgba(0,0,0,.12);
--section-padding:96px 0;--section-padding-mobile:64px 0;
--font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
--font-num:"Inter","Roboto",sans-serif;
--transition:all .3s ease;
}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);font-size:1rem;line-height:1.75;color:var(--text-primary);background:var(--bg-body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--text-primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary)}
button{font-family:inherit}
.container-xl{max-width:1200px}
h1,h2,h3,h4,h5{margin:0;font-weight:700;color:var(--text-primary)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.btn:focus-visible,.form-control:focus-visible,.filter-btn:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
/* 导航 */
.main-nav{background:var(--dark)!important;padding:0;position:sticky;top:0;z-index:1050;min-height:72px;box-shadow:0 1px 0 rgba(255,255,255,.06)}
.main-nav .navbar-brand{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;color:var(--text-white);padding:12px 0}
.brand-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--dark);box-shadow:0 2px 8px rgba(255,193,7,.3)}
.main-nav .navbar-nav{gap:6px}
.main-nav .nav-link{color:var(--text-white-70);font-size:.95rem;font-weight:500;padding:24px 14px;position:relative;transition:var(--transition);border-bottom:3px solid transparent}
.main-nav .nav-link:hover{color:var(--text-white);border-bottom-color:rgba(255,255,255,.3)}
.main-nav .nav-link.active{color:var(--primary);border-bottom-color:var(--primary)}
.nav-actions .nav-btn{background:var(--primary);color:var(--dark);border:none;padding:8px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;transition:var(--transition);white-space:nowrap}
.nav-actions .nav-btn:hover{background:var(--secondary);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(255,127,42,.3)}
.main-nav .navbar-collapse{background:var(--dark);padding:16px;border-radius:0 0 12px 12px;border-top:1px solid rgba(255,255,255,.08)}
.main-nav .nav-link{padding:14px 12px;border-bottom:1px solid rgba(255,255,255,.05);border-left:3px solid transparent}
.main-nav .nav-link.active{border-left-color:var(--primary);border-bottom-color:transparent;background:rgba(255,255,255,.04)}
.nav-actions{margin-top:12px}
.navbar-toggler{border-color:rgba(255,255,255,.38)}
.navbar-toggler:focus{box-shadow:0 0 0 3px rgba(255,193,7,.25)}
.navbar-toggler-icon{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e")!important}
@media(min-width:992px){
.main-nav .navbar-collapse{padding:0}
.main-nav .nav-link{padding:24px 14px;border-bottom:3px solid transparent;border-left:0}
.main-nav .nav-link.active{border-bottom-color:var(--primary);border-left-color:transparent;background:transparent}
.nav-actions{margin-top:0}
}
/* 页面头部 */
.page-header{background:var(--dark);padding:52px 0 48px;position:relative;overflow:hidden}
.page-header::after{content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;background:radial-gradient(circle,rgba(255,193,7,.16) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.page-header::before{content:"";position:absolute;bottom:-100px;left:-60px;width:260px;height:260px;background:radial-gradient(circle,rgba(255,127,42,.10) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.page-header-inner{position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.page-header h1{color:var(--text-white);font-size:clamp(1.6rem,2.5vw,2.2rem);font-weight:800;margin-bottom:8px;line-height:1.3}
.breadcrumb-nav{color:var(--text-white-70);font-size:.88rem}
.breadcrumb-nav a{color:var(--text-white-70);transition:var(--transition)}
.breadcrumb-nav a:hover{color:var(--primary)}
.breadcrumb-nav i{margin:0 8px;font-size:.8rem}
.filter-group{display:flex;gap:10px;flex-wrap:wrap}
.filter-btn{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:var(--text-white-70);padding:8px 18px;border-radius:var(--radius-pill);font-size:.88rem;font-weight:500;transition:var(--transition);cursor:pointer}
.filter-btn:hover,.filter-btn.active{background:var(--primary);border-color:var(--primary);color:var(--dark)}
/* 分类说明 */
.category-intro{padding:32px 0 0}
.category-intro p{font-size:1rem;color:var(--text-secondary);line-height:1.8;max-width:960px;margin-bottom:0;border-left:4px solid var(--primary);padding-left:20px}
/* 内容列表区 */
.category-list-section{padding:48px 0 72px}
.video-card-wrapper{display:block}
.video-card{display:flex;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:var(--transition);height:100%;box-shadow:var(--shadow-sm)}
.video-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:var(--primary)}
.video-card-media{width:38%;flex-shrink:0;position:relative;overflow:hidden;min-height:190px;background:var(--bg-light)}
.video-card-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .5s ease}
.video-card:hover .video-card-media img{transform:scale(1.05)}
.video-card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.08) 0%,transparent 40%);pointer-events:none}
.video-card-badge{position:absolute;top:12px;left:12px;background:var(--primary);color:var(--dark);font-size:.75rem;font-weight:700;padding:3px 12px;border-radius:var(--radius-pill);z-index:1;box-shadow:0 2px 6px rgba(0,0,0,.12)}
.video-card-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:36px;height:36px;background:rgba(31,42,58,.55);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;transition:var(--transition);z-index:1;backdrop-filter:blur(4px)}
.video-card:hover .video-card-play{background:var(--secondary);transform:translate(-50%,-50%) scale(1.1)}
.video-card-body{flex:1;padding:20px 20px 16px;display:flex;flex-direction:column}
.video-card-body h3{font-size:1.1rem;font-weight:700;margin-bottom:8px;line-height:1.4;transition:var(--transition)}
.video-card:hover .video-card-body h3{color:var(--secondary)}
.video-card-body p{font-size:.88rem;color:var(--text-secondary);line-height:1.65;margin-bottom:14px;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card-meta{display:flex;align-items:center;gap:14px;font-size:.8rem;color:var(--text-light);margin-bottom:12px;flex-wrap:wrap}
.video-card-meta span{display:inline-flex;align-items:center}
.video-card-meta i{margin-right:4px;font-size:.85rem}
.badge-tag{background:var(--primary-light);color:var(--dark);font-size:.75rem;font-weight:600;padding:2px 10px;border-radius:var(--radius-pill)}
.video-card-link{display:inline-flex;align-items:center;gap:4px;font-size:.88rem;font-weight:600;color:var(--secondary);transition:var(--transition)}
.video-card-link i{transition:transform .3s ease}
.video-card-link:hover{color:var(--dark)}
.video-card-link:hover i{transform:translateX(4px)}
/* 侧栏 */
.sidebar{position:sticky;top:90px}
.sidebar-widget{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;margin-bottom:24px;box-shadow:var(--shadow-sm)}
.sidebar-widget h3{font-size:1.08rem;font-weight:700;margin-bottom:20px;position:relative;padding-bottom:12px;color:var(--dark)}
.sidebar-widget h3::after{content:"";position:absolute;bottom:0;left:0;width:36px;height:3px;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:2px}
.hot-list{counter-reset:hot}
.hot-list li{counter-increment:hot;padding:11px 0;border-bottom:1px dashed var(--border);display:flex;align-items:center;gap:12px;font-size:.9rem;color:var(--text-primary);transition:var(--transition);cursor:pointer}
.hot-list li:last-child{border-bottom:none}
.hot-list li::before{content:counter(hot);width:22px;height:22px;background:var(--primary-light);color:var(--dark);border-radius:6px;font-size:.75rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:var(--transition)}
.hot-list li:hover{color:var(--secondary);padding-left:4px}
.hot-list li:hover::before{background:var(--primary)}
.hot-list li:nth-child(-n+3)::before{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff}
.recommend-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:220px;box-shadow:var(--shadow)}
.recommend-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .5s ease}
.recommend-card:hover img{transform:scale(1.04)}
.recommend-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.72) 0%,rgba(0,0,0,.15) 55%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:20px;z-index:1}
.recommend-overlay .tag{background:var(--primary);color:var(--dark);font-size:.74rem;font-weight:700;padding:3px 10px;border-radius:var(--radius-pill);align-self:flex-start;margin-bottom:10px}
.recommend-overlay h4{color:#fff;font-size:1rem;font-weight:700;margin-bottom:4px;line-height:1.4}
.recommend-overlay p{color:rgba(255,255,255,.8);font-size:.82rem;line-height:1.5;margin-bottom:0}
/* CTA */
.section-cta{background:var(--dark);padding:64px 0;position:relative;overflow:hidden}
.section-cta::before{content:"";position:absolute;top:-120px;right:-80px;width:380px;height:380px;background:radial-gradient(circle,rgba(255,193,7,.14) 0%,transparent 70%);border-radius:50%}
.cta-inner{text-align:center;position:relative;z-index:1}
.cta-inner h2{color:#fff;font-size:clamp(1.4rem,2.4vw,2rem);font-weight:800;margin-bottom:12px}
.cta-inner p{color:var(--text-white-70);font-size:1rem;max-width:600px;margin:0 auto 30px;line-height:1.7}
.cta-btn{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--dark);border:none;padding:13px 36px;border-radius:var(--radius-sm);font-weight:700;font-size:1rem;transition:var(--transition);display:inline-block;box-shadow:0 4px 14px rgba(255,127,42,.25)}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,127,42,.38);color:#fff;background:linear-gradient(135deg,var(--secondary),var(--primary))}
.cta-btn:active{transform:translateY(0)}
/* 页脚 */
.site-footer{background:var(--dark-deep);padding:60px 0 0;color:var(--text-white-70)}
.footer-main{padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand .brand-icon{width:38px;height:38px;font-size:1.2rem}
.footer-about{font-size:.9rem;line-height:1.75;color:rgba(255,255,255,.5);max-width:340px;margin-bottom:18px}
.footer-social{display:flex;gap:12px}
.footer-social a{width:36px;height:36px;border:1px solid rgba(255,255,255,.15);border-radius:50%;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.6);font-size:.95rem;transition:var(--transition)}
.footer-social a:hover{background:var(--primary);border-color:var(--primary);color:var(--dark);transform:translateY(-2px)}
.footer-title{font-size:.95rem;font-weight:700;color:#fff;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-title::after{content:"";position:absolute;bottom:0;left:0;width:28px;height:2px;background:var(--primary)}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.55);font-size:.9rem;transition:var(--transition);display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(3px)}
.footer-copyright{border-top:1px solid rgba(255,255,255,.06);padding:20px 0;font-size:.85rem;color:rgba(255,255,255,.4);text-align:center}
.footer-copyright a{color:rgba(255,255,255,.5)}
.footer-copyright a:hover{color:var(--primary)}
/* 响应式 */
@media(max-width:991px){
.page-header-inner{flex-direction:column;align-items:flex-start;gap:18px}
.filter-group{width:100%}
.filter-btn{flex:1;text-align:center;padding:8px 8px;font-size:.82rem}
.category-list-section{padding:40px 0 56px}
.sidebar{margin-top:32px;position:static}
}
@media(max-width:767px){
.page-header{padding:40px 0 36px}
.video-card{flex-direction:column}
.video-card-media{width:100%;min-height:180px;height:auto;position:relative;padding-bottom:56.25%}
.video-card-media img{position:absolute;inset:0;height:100%}
.video-card-body{padding:16px 16px 14px}
.video-card-body p{-webkit-line-clamp:3}
.section-cta{padding:48px 0}
.cta-btn{width:100%;text-align:center}
.footer-main .col-md-4{margin-bottom:24px}
}
@media(max-width:520px){
.filter-btn{flex:1 1 30%;font-size:.78rem;padding:6px 4px}
.video-card-meta{gap:10px;font-size:.75rem}
.hot-list li{font-size:.85rem}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}