/* roulang page: index */
:root{
  --bg-base:#08111F;
  --bg-elevated:rgba(255,255,255,0.045);
  --bg-highlight:rgba(34,211,238,0.08);
  --primary:#22D3EE;
  --primary-weak:rgba(34,211,238,0.15);
  --accent:#A3E635;
  --text-main:#E6EDF7;
  --text-weak:#8A9BB5;
  --border:rgba(255,255,255,0.08);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-badge:999px;
  --radius-large:24px;
  --shadow-card:0 8px 30px rgba(0,0,0,0.35);
  --shadow-glow:0 0 20px rgba(34,211,238,0.4);
  --font-main:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --font-num:Inter,"SF Pro Display",-apple-system,sans-serif;
  --space-section:96px;
  --space-section-sm:56px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  background:var(--bg-base);
  color:var(--text-main);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .2s ease}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit;outline:none}

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

/* 网格背景装饰 */
.grid-bg{
  background-image:
    radial-gradient(circle, rgba(34,211,238,0.08) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size:24px 24px;
}

/* ===== Header/Nav ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  height:72px;
  background:rgba(8,17,31,0.75);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:background .3s ease;
}
.site-header .header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  font-weight:700;
  color:var(--text-main);
  white-space:nowrap;
  letter-spacing:0.5px;
}
.logo .logo-dot{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 12px var(--primary);
  flex-shrink:0;
}
.logo span{background:linear-gradient(135deg,var(--primary),#7DD3FC);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.header-nav{
  display:flex;
  align-items:center;
  gap:4px;
}
.header-nav a{
  padding:8px 16px;
  font-size:15px;
  color:var(--text-weak);
  position:relative;
  border-radius:8px;
  transition:color .2s, background .2s;
}
.header-nav a:hover{color:var(--text-main)}
.header-nav a.active{color:var(--primary)}
.header-nav a.active::after{
  content:'';
  position:absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  width:12px;height:2px;
  background:var(--primary);
  border-radius:2px;
  box-shadow:0 0 8px var(--primary);
}

.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  width:160px;
  height:38px;
  padding:0 12px;
  background:rgba(255,255,255,0.08);
  border:1px solid var(--border);
  border-radius:10px;
  transition:width .25s ease, border-color .25s ease, box-shadow .25s ease;
  cursor:pointer;
}
.search-box i{color:var(--text-weak);font-size:14px}
.search-box span{color:var(--text-weak);font-size:13px;white-space:nowrap}
.search-box .kbd{
  font-size:11px;
  background:rgba(255,255,255,0.12);
  padding:2px 6px;
  border-radius:4px;
  color:var(--text-weak);
  font-family:var(--font-num);
}
.search-box:hover{width:260px;border-color:var(--primary);box-shadow:0 0 12px rgba(34,211,238,0.15)}
.header-icon-btn{
  width:38px;height:38px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,255,255,0.08);
  border:1px solid var(--border);
  border-radius:10px;
  color:var(--text-weak);
  transition:all .2s;
}
.header-icon-btn:hover{color:var(--primary);border-color:var(--primary)}
.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 24px;
  background:var(--primary);
  color:#08111F;
  font-weight:600;
  font-size:14px;
  border:none;
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:transform .15s, box-shadow .15s, background .15s;
  box-shadow:0 0 20px rgba(34,211,238,0.3);
}
.btn-primary:hover{background:#7DD3FC;box-shadow:0 0 28px rgba(34,211,238,0.5);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 24px;
  background:rgba(255,255,255,0.06);
  color:var(--text-main);
  font-weight:500;
  font-size:14px;
  border:1px solid rgba(255,255,255,0.25);
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:all .2s;
}
.btn-secondary:hover{border-color:var(--primary);background:rgba(34,211,238,0.1)}

/* 移动端汉堡 */
.menu-toggle{
  display:none;
  width:38px;height:38px;
  background:rgba(255,255,255,0.08);
  border:1px solid var(--border);
  border-radius:10px;
  color:var(--text-main);
  align-items:center;
  justify-content:center;
}

/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:600px;
  height:80vh;
  max-height:850px;
  display:flex;
  align-items:center;
  padding-top:120px;
  padding-bottom:80px;
  overflow:hidden;
}
.hero .hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  z-index:0;
}
.hero .hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(8,17,31,0.92) 0%, rgba(8,17,31,0.72) 50%, rgba(8,17,31,0.5) 100%);
  z-index:1;
}
.hero .hero-content{position:relative;z-index:2}
.hero-text-wrap{padding-right:20px}
.hero .hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 16px;
  background:rgba(34,211,238,0.12);
  border:1px solid rgba(34,211,238,0.3);
  border-radius:var(--radius-badge);
  font-size:13px;
  color:var(--primary);
  margin-bottom:24px;
}
.hero .hero-badge .pulse-dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.5}}
.hero h1{
  font-size:48px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:1px;
  color:var(--text-main);
  margin-bottom:20px;
}
.hero h1 .highlight{
  background:linear-gradient(135deg,var(--primary),#7DD3FC);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  text-shadow:0 0 30px rgba(34,211,238,0.2);
}
.hero .hero-sub{
  font-size:18px;
  color:var(--text-weak);
  max-width:520px;
  margin-bottom:32px;
  line-height:1.8;
}
.hero .hero-btns{display:flex;gap:16px;flex-wrap:wrap}

.hero-panel-wrap{position:relative}
.hero-panel-status{
  position:absolute;
  top:-15px;
  right:30px;
  z-index:3;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 18px;
  background:rgba(8,17,31,0.9);
  border:1px solid rgba(163,230,53,0.4);
  border-radius:var(--radius-badge);
  font-size:13px;
  color:var(--text-main);
  box-shadow:0 4px 20px rgba(0,0,0,0.4);
}
.hero-panel-status .green-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.hero-panel{
  position:relative;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius-large);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  overflow:hidden;
  padding:20px;
  box-shadow:var(--shadow-card);
}
.hero-panel .panel-media{
  border-radius:16px;
  overflow:hidden;
  aspect-ratio:16/9;
  background:rgba(255,255,255,0.03);
  position:relative;
}
.hero-panel .panel-media img{width:100%;height:100%;object-fit:cover}
.hero-panel .panel-media::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(8,17,31,0.3) 100%);
}
.panel-float-stats{
  position:absolute;
  bottom:32px;
  left:32px;
  display:flex;
  gap:20px;
  z-index:2;
}
.panel-stat{
  background:rgba(8,17,31,0.8);
  backdrop-filter:blur(8px);
  border-radius:12px;
  padding:12px 18px;
  border:1px solid rgba(255,255,255,0.1);
  text-align:center;
}
.panel-stat .num{
  font-family:var(--font-num);
  font-size:24px;
  font-weight:700;
  color:var(--primary);
  text-shadow:0 0 10px rgba(34,211,238,0.4);
}
.panel-stat .label{font-size:12px;color:var(--text-weak)}

/* ===== Trust Bar ===== */
.trust-bar{
  padding:40px 0;
  background:rgba(255,255,255,0.02);
  border-bottom:1px solid var(--border);
  border-top:1px solid var(--border);
}
.trust-item{
  text-align:center;
  padding:12px 8px;
}
.trust-item .num{
  font-family:var(--font-num);
  font-size:32px;
  font-weight:700;
  color:var(--text-main);
  line-height:1.2;
}
.trust-item .num em{
  font-style:normal;
  color:var(--primary);
}
.trust-item .label{
  font-size:14px;
  color:var(--text-weak);
  margin-top:4px;
}

/* ===== 通用板块 ===== */
.section-block{padding:var(--space-section) 0}
.section-block-sm{padding:56px 0}
.section-head{margin-bottom:56px}
.section-tag{
  display:inline-block;
  padding:5px 14px;
  background:var(--primary-weak);
  border-radius:var(--radius-badge);
  font-size:13px;
  color:var(--primary);
  margin-bottom:16px;
  letter-spacing:1px;
}
.section-title{
  font-size:34px;
  font-weight:700;
  line-height:1.3;
  color:var(--text-main);
  margin-bottom:16px;
  letter-spacing:0.5px;
}
.section-desc{
  font-size:16px;
  color:var(--text-weak);
  max-width:640px;
  line-height:1.8;
}
.section-head .view-all{
  font-size:14px;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:500;
}
.section-head .view-all:hover{color:#7DD3FC}

/* ===== 核心服务 ===== */
.core-services{
  position:relative;
  background:var(--bg-base);
}
.core-left{position:sticky;top:120px}
.core-left .section-title{font-size:36px}
.core-list{
  display:flex;
  flex-direction:column;
  gap:24px;
}
.service-card{
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:28px;
  transition:all .25s ease;
  position:relative;
  overflow:hidden;
}
.service-card::before{
  content:'';
  position:absolute;
  left:0;top:0;
  width:3px;height:100%;
  background:var(--primary);
  opacity:0;
  transition:opacity .25s;
}
.service-card:hover{
  background:var(--bg-highlight);
  transform:translateY(-3px);
  box-shadow:var(--shadow-card);
}
.service-card:hover::before{opacity:1}
.service-card .card-icon{
  width:48px;height:48px;
  border-radius:12px;
  background:var(--primary-weak);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  color:var(--primary);
  margin-bottom:16px;
}
.service-card h3{font-size:20px;font-weight:600;margin-bottom:8px;color:var(--text-main)}
.service-card p{font-size:15px;color:var(--text-weak);line-height:1.7}
.service-card .card-link{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-size:13px;
  color:var(--primary);
  margin-top:12px;
  font-weight:500;
}

/* ===== 数据面板 ===== */
.data-panel-section{
  background:#040B14;
  position:relative;
  padding:96px 0;
  border-top:1px solid rgba(255,255,255,0.03);
  border-bottom:1px solid rgba(255,255,255,0.03);
  overflow:hidden;
}
.data-panel-section::before{
  content:'';
  position:absolute;
  top:-120px;right:-80px;
  width:320px;height:320px;
  background:radial-gradient(circle, rgba(34,211,238,0.06) 0%, transparent 70%);
  pointer-events:none;
}
.data-panel-section::after{
  content:'';
  position:absolute;
  bottom:-160px;left:-100px;
  width:400px;height:400px;
  background:radial-gradient(circle, rgba(163,230,53,0.04) 0%, transparent 70%);
  pointer-events:none;
}
.data-panel-section .container{position:relative;z-index:1}
.data-intro h2{
  font-size:32px;
  font-weight:700;
  line-height:1.3;
  color:var(--text-main);
  margin-bottom:16px;
}
.data-intro p{
  color:var(--text-weak);
  font-size:15px;
  line-height:1.8;
  max-width:360px;
}
.data-stat-col{
  border-right:1px solid rgba(255,255,255,0.08);
  padding:16px 24px;
}
.data-stat-col:last-child{border-right:none}
.data-stat-col .num{
  font-family:var(--font-num);
  font-size:48px;
  font-weight:700;
  line-height:1.2;
  color:var(--primary);
  text-shadow:0 0 24px rgba(34,211,238,0.35);
  margin-bottom:8px;
}
.data-stat-col .num .unit{font-size:20px;color:var(--text-weak)}
.data-stat-col .label{font-size:14px;color:var(--text-weak)}

/* ===== 案例展示 ===== */
.cases-section{background:var(--bg-base);overflow:hidden}
.cases-track{
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding-bottom:24px;
  scroll-snap-type:x mandatory;
}
.cases-track::-webkit-scrollbar{height:6px}
.cases-track::-webkit-scrollbar-track{background:rgba(255,255,255,0.04);border-radius:3px}
.cases-track::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px}
.case-card{
  flex:0 0 360px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
  scroll-snap-align:start;
  transition:transform .25s, box-shadow .25s;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.case-card .case-media{
  height:200px;
  overflow:hidden;
  position:relative;
}
.case-card .case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-media img{transform:scale(1.04)}
.case-card .case-body{padding:20px}
.case-card .case-tags{display:flex;gap:8px;margin-bottom:12px}
.case-card .case-tags .tag{
  font-size:12px;
  padding:3px 10px;
  background:var(--primary-weak);
  color:var(--primary);
  border-radius:var(--radius-badge);
}
.case-card h3{font-size:18px;font-weight:600;color:var(--text-main);margin-bottom:8px}
.case-card p{font-size:14px;color:var(--text-weak);line-height:1.7;margin-bottom:16px}
.case-card .case-result{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-num);
  font-size:14px;
  color:var(--accent);
  font-weight:600;
}
.case-card .case-result i{font-size:12px}

/* ===== 解决方案 Accordion ===== */
.solutions-section{
  background:rgba(255,255,255,0.015);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.accordion-item{
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  margin-bottom:16px;
  overflow:hidden;
  transition:border-color .2s;
}
.accordion-item:hover{border-color:rgba(34,211,238,0.3)}
.accordion-item .acc-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:22px 28px;
  cursor:pointer;
  user-select:none;
}
.accordion-item .acc-header .acc-title{
  display:flex;
  align-items:center;
  gap:14px;
  font-size:18px;
  font-weight:600;
  color:var(--text-main);
}
.accordion-item .acc-header .acc-title .acc-icon{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--primary-weak);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--primary);
  font-size:16px;
  flex-shrink:0;
}
.accordion-item .acc-header .acc-scene{
  font-size:13px;
  color:var(--text-weak);
  padding:4px 12px;
  background:rgba(255,255,255,0.06);
  border-radius:var(--radius-badge);
  white-space:nowrap;
}
.accordion-item .acc-header .acc-toggle{
  width:28px;height:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(255,255,255,0.08);
  color:var(--text-weak);
  transition:transform .3s;
  font-size:16px;
  flex-shrink:0;
}
.accordion-item.is-active .acc-toggle{transform:rotate(45deg);color:var(--primary)}
.accordion-item .acc-content{
  display:none;
  padding:0 28px 24px;
  color:var(--text-weak);
  font-size:15px;
  line-height:1.8;
}
.accordion-item.is-active .acc-content{display:block;animation:accFade .3s ease}
@keyframes accFade{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}

/* ===== 最新资讯列表 ===== */
.latest-news-section{background:var(--bg-base)}
.news-list{display:flex;flex-direction:column;gap:12px}
.news-item{
  display:flex;
  align-items:center;
  gap:20px;
  padding:20px 24px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-left:3px solid transparent;
  border-radius:var(--radius-card);
  transition:all .25s;
}
.news-item:hover{
  background:var(--bg-highlight);
  border-left-color:var(--primary);
}
.news-item .news-cat{
  font-size:12px;
  padding:3px 12px;
  background:var(--primary-weak);
  color:var(--primary);
  border-radius:var(--radius-badge);
  white-space:nowrap;
  flex-shrink:0;
}
.news-item .news-info{flex:1;min-width:0}
.news-item .news-title{
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  transition:color .2s;
}
.news-item:hover .news-title{color:var(--primary)}
.news-item .news-summary{
  font-size:14px;
  color:var(--text-weak);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  margin-top:4px;
}
.news-item .news-meta{
  display:flex;
  align-items:center;
  gap:16px;
  flex-shrink:0;
}
.news-item .news-time{
  font-family:var(--font-num);
  font-size:13px;
  color:var(--text-weak);
}
.news-item .news-arrow{
  width:36px;height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(255,255,255,0.06);
  color:var(--primary);
  font-size:14px;
  flex-shrink:0;
  transition:background .2s, transform .2s;
}
.news-item:hover .news-arrow{background:var(--primary-weak);transform:translateX(4px)}
.news-empty{
  text-align:center;
  padding:60px 20px;
  background:var(--bg-elevated);
  border:1px dashed var(--border);
  border-radius:var(--radius-card);
  color:var(--text-weak);
  font-size:15px;
}
.news-empty i{
  display:block;
  font-size:36px;
  margin-bottom:16px;
  color:var(--text-weak);
  opacity:0.6;
}

/* ===== FAQ ===== */
.faq-section{background:rgba(255,255,255,0.015)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{
  border-bottom:1px solid var(--border);
  padding:20px 0;
}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-item .faq-q{
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  cursor:pointer;
  user-select:none;
  padding:8px 0;
}
.faq-item .faq-q .faq-icon{
  width:26px;height:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  color:var(--text-weak);
  transition:transform .3s;
  flex-shrink:0;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--primary)}
.faq-item .faq-a{
  display:none;
  padding:4px 0 8px;
  color:var(--text-weak);
  font-size:15px;
  line-height:1.8;
  max-width:680px;
}
.faq-item.is-open .faq-a{display:block;animation:accFade .3s ease}

/* ===== CTA / 联系 ===== */
.contact-section{
  position:relative;
  padding:96px 0;
  overflow:hidden;
}
.contact-section .contact-bg{
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  z-index:0;
}
.contact-section .contact-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(8,17,31,0.88), rgba(8,17,31,0.96));
  z-index:1;
}
.contact-section .container{position:relative;z-index:2}
.contact-panel{
  background:rgba(255,255,255,0.06);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius-large);
  padding:48px;
  box-shadow:var(--shadow-card);
}
.contact-panel h2{
  font-size:28px;
  font-weight:700;
  margin-bottom:8px;
  color:var(--text-main);
}
.contact-panel .contact-desc{
  color:var(--text-weak);
  font-size:15px;
  margin-bottom:32px;
}
.form-group{margin-bottom:20px}
.form-group label{
  display:block;
  font-size:14px;
  color:var(--text-weak);
  margin-bottom:8px;
  font-weight:500;
}
.form-group input,
.form-group textarea{
  width:100%;
  padding:12px 16px;
  background:rgba(8,17,31,0.5);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:10px;
  color:var(--text-main);
  font-size:15px;
  transition:border-color .2s, box-shadow .2s;
}
.form-group input:focus,
.form-group textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(34,211,238,0.15);
}
.form-group textarea{min-height:100px;resize:vertical}
.form-group input::placeholder,
.form-group textarea::placeholder{color:rgba(255,255,255,0.3)}
.contact-submit{
  width:100%;
  padding:14px;
  background:var(--primary);
  color:#08111F;
  font-size:15px;
  font-weight:600;
  border:none;
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:all .2s;
  box-shadow:0 0 20px rgba(34,211,238,0.3);
}
.contact-submit:hover{background:#7DD3FC;box-shadow:0 0 30px rgba(34,211,238,0.5)}
.contact-submit:active{transform:translateY(1px)}
.contact-info-list{margin-top:8px}
.contact-info-item{
  display:flex;
  align-items:flex-start;
  gap:14px;
  margin-bottom:20px;
}
.contact-info-item i{
  width:38px;height:38px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--primary-weak);
  border-radius:10px;
  color:var(--primary);
  font-size:15px;
  flex-shrink:0;
}
.contact-info-item .info-label{font-size:13px;color:var(--text-weak);margin-bottom:2px}
.contact-info-item .info-value{font-size:15px;color:var(--text-main)}
.response-note{
  font-size:13px;
  color:rgba(255,255,255,0.4);
  text-align:center;
  margin-top:24px;
  border-top:1px solid rgba(255,255,255,0.08);
  padding-top:16px;
}

/* ===== Footer ===== */
.site-footer{
  background:#050B15;
  padding:64px 0 0;
  border-top:1px solid rgba(255,255,255,0.03);
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.8;
  max-width:280px;
}
.footer-col h4{
  font-size:14px;
  color:var(--text-weak);
  font-weight:600;
  margin-bottom:20px;
  text-transform:uppercase;
  letter-spacing:1px;
}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,0.55);
  transition:color .2s, padding-left .2s;
  display:inline-block;
}
.footer-col ul li a:hover{
  color:var(--text-main);
  padding-left:4px;
  border-left:2px solid var(--primary);
}
.footer-col .contact-line{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,0.55);
  margin-bottom:12px;
}
.footer-col .contact-line i{color:var(--primary);width:16px;text-align:center}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.04);
  margin-top:48px;
  padding:20px 0;
}
.footer-bottom .copyright{
  font-size:12px;
  color:rgba(255,255,255,0.35);
}

/* ===== 响应式 ===== */
@media screen and (max-width:1023px){
  .hero h1{font-size:40px}
  .hero .hero-content{padding:0}
  .site-header .header-nav{display:none}
  .menu-toggle{display:flex}
  .header-nav.mobile-open{
    display:flex;
    position:absolute;
    top:72px;
    left:0;right:0;
    flex-direction:column;
    background:rgba(8,17,31,0.96);
    padding:20px 24px;
    border-bottom:1px solid var(--border);
    backdrop-filter:blur(20px);
    gap:8px;
  }
  .header-nav.mobile-open a{
    padding:14px 16px;
    font-size:16px;
  }
  .search-box{width:44px;padding:0;justify-content:center}
  .search-box span,.search-box .kbd{display:none}
  .header-actions .btn-primary{display:none}
}
@media screen and (max-width:767px){
  :root{--space-section:56px}
  .hero{height:auto;min-height:0;padding-top:120px;padding-bottom:60px}
  .hero h1{font-size:32px;line-height:1.35}
  .hero .hero-sub{font-size:16px}
  .hero .hero-btns{flex-direction:column;width:100%}
  .hero .hero-btns .btn-primary,.hero .hero-btns .btn-secondary{width:100%;justify-content:center}
  .hero-panel-wrap{margin-top:40px}
  .hero-panel .panel-media{aspect-ratio:16/10}
  .panel-float-stats{left:20px;bottom:20px;gap:12px}
  .section-title{font-size:26px}
  .section-desc{font-size:15px}
  .core-left{position:static;margin-bottom:32px}
  .data-stat-col{border-right:none;border-bottom:1px solid rgba(255,255,255,0.06);padding:16px 8px}
  .data-stat-col:last-child{border-bottom:none}
  .data-stat-col .num{font-size:36px}
  .cases-track{flex-wrap:nowrap}
  .case-card{flex:0 0 280px}
  .news-item{flex-direction:column;align-items:flex-start;gap:10px;padding:16px}
  .news-item .news-info{width:100%}
  .news-item .news-title,.news-item .news-summary{white-space:normal;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
  .news-item .news-meta{width:100%;justify-content:space-between}
  .contact-panel{padding:28px}
  .accordion-item .acc-header{flex-wrap:wrap;gap:12px;padding:18px 20px}
  .accordion-item .acc-content{padding:0 20px 20px}
  .acc-header .acc-scene{display:none}
}
@media screen and (max-width:520px){
  .hero h1{font-size:28px}
  .section-title{font-size:23px}
  .logo{font-size:17px}
  .hero-panel{display:none}
  .hero-badge{font-size:12px}
}

/* roulang page: category1 */
/* ========== Design Tokens ========== */
    :root {
      --bg-base: #08111F;
      --bg-elevated: rgba(255, 255, 255, 0.04);
      --bg-highlight: rgba(34, 211, 238, 0.08);
      --bg-glass: rgba(255, 255, 255, 0.05);
      --bg-deep: #050B14;
      --primary: #22D3EE;
      --primary-soft: rgba(34, 211, 238, 0.15);
      --primary-glow: rgba(34, 211, 238, 0.4);
      --accent: #A3E635;
      --white: #F8FAFC;
      --text-main: #E2E8F0;
      --text-weak: #94A3B8;
      --text-muted: #64748B;
      --border-soft: rgba(255, 255, 255, 0.08);
      --border-light: rgba(255, 255, 255, 0.14);
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-panel: 24px;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
      --shadow-btn: 0 0 20px rgba(34, 211, 238, 0.4);
      --space-section: 96px;
      --space-section-md: 56px;
      --font-main: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      --font-num: "SF Pro Display", Inter, "Segoe UI", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-main);
      line-height: 1.7;
      color: var(--text-main);
      background-color: var(--bg-base);
      background-image:
        radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.035) 1px, transparent 0);
      background-size: 32px 32px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: #7DD3FC;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
    }

    ul {
      list-style: none;
    }

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

    /* ========== Header / Nav ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 200;
      height: 72px;
      background: rgba(8, 17, 31, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

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

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .logo-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 12px var(--primary-glow);
      flex-shrink: 0;
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

    .header-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      flex: 1;
      justify-content: center;
    }

    .header-nav a {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-weak);
      position: relative;
      white-space: nowrap;
      transition: all 0.2s ease;
    }

    .header-nav a:hover {
      color: var(--white);
      background: rgba(255, 255, 255, 0.05);
    }

    .header-nav a.active {
      color: var(--white);
    }

    .header-nav a.active::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 14px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      box-shadow: 0 0 8px var(--primary-glow);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .search-toggle, .search-box {
      display: flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 10px;
      height: 40px;
      padding: 0 14px;
      gap: 8px;
      transition: all 0.3s ease;
      width: 160px;
    }

    .search-toggle:hover, .search-box:hover {
      width: 220px;
      border-color: var(--primary-soft);
      background: rgba(255, 255, 255, 0.1);
    }

    .search-toggle i, .search-box i {
      color: var(--text-weak);
      font-size: 14px;
    }

    .search-toggle input, .search-box input {
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 14px;
      width: 100%;
    }

    .search-toggle input::placeholder, .search-box input::placeholder {
      color: var(--text-muted);
    }

    .kbd-hint {
      font-size: 11px;
      color: var(--text-muted);
      background: rgba(255, 255, 255, 0.06);
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      font-family: var(--font-num);
      white-space: nowrap;
    }

    .icon-btn {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-weak);
      cursor: pointer;
      transition: all 0.2s ease;
      font-size: 15px;
    }

    .icon-btn:hover {
      color: var(--primary);
      border-color: var(--primary-soft);
      background: rgba(34, 211, 238, 0.08);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--primary);
      color: #08111F;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: all 0.2s ease;
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: #67E8F9;
      color: #08111F;
      box-shadow: 0 0 28px var(--primary-glow);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: translateY(1px);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.05);
      color: var(--white);
      font-size: 14px;
      font-weight: 500;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      border: 1px solid rgba(255, 255, 255, 0.2);
      cursor: pointer;
      transition: all 0.2s ease;
      backdrop-filter: blur(6px);
      white-space: nowrap;
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(34, 211, 238, 0.06);
    }

    .btn-outline:active {
      transform: translateY(1px);
    }

    /* ========== Page Hero ========== */
    .page-hero {
      position: relative;
      padding: 72px 0 72px;
      background:
        radial-gradient(circle at 20% 30%, rgba(34, 211, 238, 0.12), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(163, 230, 53, 0.06), transparent 30%),
        var(--bg-deep);
      border-bottom: 1px solid var(--border-soft);
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 48px 48px;
      pointer-events: none;
    }

    .page-hero .hero-content {
      position: relative;
      z-index: 2;
      max-width: 720px;
    }

    .page-hero .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-soft);
      border: 1px solid rgba(34, 211, 238, 0.2);
      border-radius: 999px;
      padding: 6px 16px;
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .page-hero .hero-badge i {
      font-size: 10px;
      color: var(--accent);
    }

    .page-hero h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .page-hero h1 .highlight {
      background: linear-gradient(90deg, var(--primary), #7DD3FC);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .page-hero .hero-desc {
      font-size: 17px;
      line-height: 1.8;
      color: var(--text-weak);
      margin-bottom: 32px;
      max-width: 600px;
    }

    .hero-meta {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
    }

    .hero-meta .meta-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-weak);
    }

    .hero-meta .meta-item i {
      color: var(--primary);
      font-size: 16px;
    }

    /* ========== Main Layout ========== */
    .category-main {
      padding: var(--space-section) 0 80px;
    }

    .category-grid {
      display: flex;
      gap: 40px;
      align-items: flex-start;
    }

    .category-content {
      flex: 0 0 70%;
      max-width: 70%;
    }

    .category-sidebar {
      flex: 0 0 30%;
      max-width: 30%;
    }

    /* ========== Topic Cards ========== */
    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .section-label::before {
      content: '';
      width: 18px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      box-shadow: 0 0 8px var(--primary-glow);
    }

    .category-content h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--white);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .category-content .content-desc {
      font-size: 16px;
      color: var(--text-weak);
      line-height: 1.8;
      margin-bottom: 40px;
    }

    .topic-list {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .topic-card {
      display: flex;
      background: var(--bg-elevated);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: all 0.25s ease;
      backdrop-filter: blur(8px);
    }

    .topic-card:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(34, 211, 238, 0.25);
      box-shadow: var(--shadow-card);
      transform: translateY(-2px);
    }

    .topic-card.alt .thumb {
      order: 2;
    }

    .topic-card .thumb {
      flex: 0 0 220px;
      min-height: 160px;
      position: relative;
      overflow: hidden;
    }

    .topic-card .thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }

    .topic-card:hover .thumb img {
      transform: scale(1.04);
    }

    .topic-card .thumb .thumb-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(8, 17, 31, 0.75);
      backdrop-filter: blur(8px);
      color: var(--primary);
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 999px;
      border: 1px solid rgba(34, 211, 238, 0.3);
      font-weight: 500;
    }

    .topic-card .card-body {
      flex: 1;
      padding: 24px 28px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .topic-card .card-body h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .topic-card .card-body p {
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .topic-card .card-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 13px;
      color: var(--text-muted);
      margin-top: auto;
    }

    .topic-card .card-meta .step-num {
      font-family: var(--font-num);
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      opacity: 0.6;
      line-height: 1;
    }

    .topic-card .card-meta .more-link {
      color: var(--primary);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 500;
      margin-left: auto;
      transition: gap 0.2s ease;
    }

    .topic-card .card-meta .more-link:hover {
      gap: 10px;
      color: #7DD3FC;
    }

    /* ========== Sidebar ========== */
    .sidebar-widget {
      background: var(--bg-elevated);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-card);
      padding: 24px;
      margin-bottom: 24px;
      backdrop-filter: blur(8px);
    }

    .sidebar-widget .widget-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .sidebar-widget .widget-title i {
      color: var(--primary);
      font-size: 16px;
    }

    .widget-nav {
      display: flex;
      flex-direction: column;
    }

    .widget-nav a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      font-size: 15px;
      color: var(--text-weak);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      transition: all 0.2s ease;
    }

    .widget-nav a:last-child {
      border-bottom: none;
    }

    .widget-nav a:hover {
      color: var(--primary);
      padding-left: 6px;
    }

    .widget-nav a:hover i {
      transform: translateX(4px);
      opacity: 1;
    }

    .widget-nav a i {
      font-size: 12px;
      color: var(--text-muted);
      transition: all 0.2s ease;
      opacity: 0.6;
    }

    .widget-nav a.active-nav {
      color: var(--primary);
      font-weight: 500;
    }

    .widget-nav a.active-nav i {
      color: var(--primary);
      opacity: 1;
    }

    /* 相关资源 */
    .resource-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .resource-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: 12px;
      transition: all 0.2s ease;
    }

    .resource-item:hover {
      background: rgba(34, 211, 238, 0.06);
      border-color: rgba(34, 211, 238, 0.2);
    }

    .resource-item .res-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      flex-shrink: 0;
    }

    .resource-item .res-body h4 {
      font-size: 14px;
      font-weight: 500;
      color: var(--white);
      margin-bottom: 2px;
    }

    .resource-item .res-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 咨询卡片 */
    .sidebar-cta {
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(8, 17, 31, 0.6));
      border: 1px solid rgba(34, 211, 238, 0.2);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      text-align: center;
    }

    .sidebar-cta .cta-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--primary-soft);
      border: 1px solid rgba(34, 211, 238, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 22px;
      color: var(--primary);
    }

    .sidebar-cta h4 {
      font-size: 18px;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 8px;
    }

    .sidebar-cta p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    /* ========== Steps Section ========== */
    .steps-section {
      background: var(--bg-deep);
      padding: 80px 0;
      border-top: 1px solid var(--border-soft);
      border-bottom: 1px solid var(--border-soft);
      position: relative;
      overflow: hidden;
    }

    .steps-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background:
        radial-gradient(circle at 15% 20%, rgba(34, 211, 238, 0.08), transparent 35%),
        radial-gradient(circle at 85% 80%, rgba(34, 211, 238, 0.05), transparent 30%);
      pointer-events: none;
    }

    .steps-section .container {
      position: relative;
      z-index: 2;
    }

    .section-head {
      text-align: center;
      max-width: 600px;
      margin: 0 auto 56px;
    }

    .section-head .section-label {
      justify-content: center;
    }

    .section-head .section-label::before {
      display: none;
    }

    .section-head h2 {
      font-size: 34px;
      font-weight: 700;
      color: var(--white);
      line-height: 1.3;
      margin-bottom: 12px;
    }

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

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .step-card {
      position: relative;
      background: var(--bg-elevated);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius-card);
      padding: 32px 24px 28px;
      transition: all 0.3s ease;
      text-align: left;
    }

    .step-card:hover {
      border-color: rgba(34, 211, 238, 0.3);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }

    .step-card .step-num {
      font-family: var(--font-num);
      font-size: 42px;
      font-weight: 800;
      line-height: 1;
      background: linear-gradient(135deg, var(--primary), #7DD3FC);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 16px;
      display: block;
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 10px;
    }

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

    .step-card .step-icon {
      position: absolute;
      top: 24px;
      right: 24px;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--primary-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      opacity: 0;
      transform: scale(0.8);
      transition: all 0.25s ease;
    }

    .step-card:hover .step-icon {
      opacity: 1;
      transform: scale(1);
    }

    /* ========== FAQ Section ========== */
    .faq-section {
      padding: var(--space-section) 0;
    }

    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-elevated);
      border: 1px solid var(--border-soft);
      border-radius: 12px;
      margin-bottom: 16px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(34, 211, 238, 0.2);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 500;
      color: var(--white);
      list-style: none;
      user-select: none;
      transition: color 0.2s ease;
    }

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

    .faq-item summary::after {
      content: '+';
      font-size: 20px;
      font-weight: 300;
      color: var(--primary);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      margin-left: 16px;
      font-family: var(--font-num);
    }

    .faq-item[open] summary {
      color: var(--primary);
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
    }

    .faq-item .faq-body {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.8;
    }

    /* ========== CTA Section ========== */
    .cta-section {
      padding: 80px 0;
      background: var(--bg-deep);
      position: relative;
      overflow: hidden;
    }

    .cta-panel {
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(8, 17, 31, 0.8));
      border: 1px solid rgba(34, 211, 238, 0.2);
      border-radius: var(--radius-panel);
      padding: 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      backdrop-filter: blur(10px);
      position: relative;
      overflow: hidden;
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      top: -40px;
      right: -40px;
      width: 160px;
      height: 160px;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 70%);
      border-radius: 50%;
    }

    .cta-panel .cta-text h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 8px;
      line-height: 1.3;
    }

    .cta-panel .cta-text p {
      font-size: 15px;
      color: var(--text-weak);
    }

    .cta-panel .cta-actions {
      display: flex;
      gap: 16px;
      flex-shrink: 0;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: #050B14;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 72px;
      position: relative;
    }

    .site-footer .grid-x {
      display: flex;
      flex-wrap: wrap;
      gap: 32px 0;
    }

    .site-footer .footer-brand .logo {
      margin-bottom: 16px;
    }

    .site-footer .footer-brand p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      max-width: 320px;
    }

    .site-footer .footer-col h4 {
      font-size: 14px;
      color: var(--text-weak);
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.05em;
    }

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

    .site-footer .footer-col ul li a {
      font-size: 14px;
      color: var(--text-muted);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .site-footer .footer-col ul li a:hover {
      color: var(--white);
    }

    .site-footer .footer-col ul li a:hover::before {
      content: '';
      width: 4px;
      height: 4px;
      background: var(--primary);
      border-radius: 50%;
      flex-shrink: 0;
    }

    .site-footer .contact-line {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .site-footer .contact-line i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      margin-top: 56px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding: 20px 0;
    }

    .footer-bottom .copyright {
      font-size: 13px;
      color: #475569;
      text-align: center;
    }

    /* ========== Mobile Navigation ========== */
    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-weak);
      cursor: pointer;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    /* ========== Responsive ========== */
    @media screen and (max-width: 1024px) {
      .page-hero h1 {
        font-size: 38px;
      }

      .topic-card .thumb {
        flex: 0 0 180px;
      }

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

      .search-toggle, .search-box {
        width: 44px;
        padding: 0;
        justify-content: center;
      }

      .search-toggle input, .search-box input {
        display: none;
      }

      .search-toggle:hover, .search-box:hover {
        width: 44px;
      }

      .kbd-hint {
        display: none;
      }
    }

    @media screen and (max-width: 768px) {
      .site-header .header-inner {
        gap: 12px;
      }

      .header-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(8, 17, 31, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px;
        gap: 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 199;
      }

      .header-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
      }

      .header-nav a {
        padding: 12px 16px;
        font-size: 15px;
      }

      .header-nav a.active::after {
        display: none;
      }

      .header-nav a.active {
        background: rgba(34, 211, 238, 0.1);
        color: var(--primary);
      }

      .nav-toggle {
        display: flex;
      }

      .header-actions .btn-primary {
        display: none;
      }

      .page-hero {
        padding: 48px 0 48px;
      }

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

      .hero-meta {
        gap: 16px;
      }

      .category-main {
        padding: 56px 0;
      }

      .category-grid {
        flex-direction: column;
        gap: 32px;
      }

      .category-content {
        flex: 0 0 100%;
        max-width: 100%;
      }

      .category-sidebar {
        flex: 0 0 100%;
        max-width: 100%;
      }

      .topic-card {
        flex-direction: column;
      }

      .topic-card.alt .thumb {
        order: 0;
      }

      .topic-card .thumb {
        flex: 0 0 200px;
        min-height: 180px;
      }

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

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

      .cta-panel {
        flex-direction: column;
        padding: 32px 24px;
        text-align: center;
      }

      .cta-panel .cta-actions {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
      }

      .site-footer {
        padding-top: 48px;
      }

      .site-footer .footer-brand, .site-footer .footer-col {
        flex: 0 0 100% !important;
        max-width: 100% !important;
      }
    }

    @media screen and (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

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

      .page-hero .hero-desc {
        font-size: 15px;
      }

      .category-content h2 {
        font-size: 22px;
      }

      .topic-card .thumb {
        flex: 0 0 160px;
      }

      .topic-card .card-body {
        padding: 20px;
      }

      .step-card {
        padding: 24px 20px;
      }

      .faq-item summary {
        font-size: 15px;
        padding: 16px;
      }

      .faq-item .faq-body {
        padding: 0 16px 16px;
      }

      .cta-panel .cta-text h2 {
        font-size: 22px;
      }
    }

/* roulang page: article */
:root {
      --primary: #22D3EE;
      --primary-dark: #0EA5E9;
      --accent: #A3E635;
      --bg-base: #08111F;
      --bg-elevated: rgba(255, 255, 255, 0.04);
      --bg-highlight: rgba(255, 255, 255, 0.08);
      --border: rgba(255, 255, 255, 0.08);
      --text: #E5EDF5;
      --text-weak: #9AA7B8;
      --text-muted: #6B7A8D;
      --radius: 16px;
      --radius-sm: 12px;
      --radius-lg: 24px;
      --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
      --max-width: 1200px;
      --transition: 0.25s ease;
      --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-base);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      background-image:
        radial-gradient(circle at 20% 20%, rgba(34, 211, 238, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 80% 60%, rgba(163, 230, 53, 0.04) 0%, transparent 35%);
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
      background-size: 32px 32px;
      pointer-events: none;
      z-index: -1;
    }

    a {
      color: var(--primary);
      text-decoration: none;
    }

    a:hover {
      color: var(--accent);
    }

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

    ul,
    ol {
      list-style-position: inside;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      height: 72px;
      background: rgba(8, 17, 31, 0.86);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      gap: 24px;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text);
      white-space: nowrap;
    }

    .logo-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 14px rgba(34, 211, 238, 0.9);
    }

    .header-nav {
      display: flex;
      gap: 22px;
      margin-left: 8px;
    }

    .header-nav a {
      position: relative;
      padding: 8px 4px;
      color: var(--text-weak);
      font-size: 15px;
      font-weight: 500;
      transition: color 0.2s;
    }

    .header-nav a:hover {
      color: var(--text);
    }

    .header-nav a.active {
      color: var(--text);
    }

    .header-nav a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 12px;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(34, 211, 238, 0.7);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
    }

    .search-box {
      display: flex;
      align-items: center;
      gap: 8px;
      width: 220px;
      padding: 6px 12px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid var(--border);
      border-radius: 10px;
      transition: width 0.3s, border-color 0.2s, box-shadow 0.2s;
    }

    .search-box:hover {
      width: 260px;
      border-color: var(--primary);
    }

    .search-box i {
      color: var(--text-weak);
      font-size: 14px;
    }

    .search-box input {
      flex: 1;
      background: transparent;
      border: none;
      outline: none;
      color: var(--text);
      font-size: 14px;
      width: 100%;
    }

    .search-box input::placeholder {
      color: var(--text-muted);
    }

    .search-box .kbd {
      font-size: 12px;
      color: var(--text-muted);
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid var(--border);
      border-radius: 4px;
      padding: 2px 6px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      padding: 12px 24px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #2DD4BF);
      color: #08111F;
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(34, 211, 238, 0.6);
      color: #08111F;
    }

    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: 0 0 14px rgba(34, 211, 238, 0.4);
    }

    .btn-sm {
      padding: 8px 16px;
      font-size: 14px;
      border-radius: 10px;
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text);
      width: 40px;
      height: 40px;
      border-radius: 10px;
      font-size: 16px;
      align-items: center;
      justify-content: center;
    }

    /* ===== 文章页 ===== */
    .article-main {
      max-width: 780px;
      margin: 0 auto;
      padding: 32px 24px;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .breadcrumb a {
      color: var(--text-weak);
    }

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

    .breadcrumb .sep {
      opacity: 0.4;
    }

    .breadcrumb .current {
      color: var(--text);
      font-weight: 500;
      max-width: 220px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .article-wrap {
      background: var(--bg-elevated);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: clamp(24px, 5vw, 48px);
      box-shadow: var(--shadow);
    }

    .article-header {
      margin-bottom: 28px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border);
    }

    .article-header h1 {
      font-size: clamp(28px, 5vw, 44px);
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--text);
      margin-bottom: 16px;
    }

    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 20px;
    }

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

    .article-meta i {
      color: var(--primary);
    }

    .article-summary {
      font-size: 18px;
      line-height: 1.8;
      color: #C0CDDA;
      border-left: 3px solid var(--primary);
      padding-left: 16px;
      background: linear-gradient(90deg, rgba(34, 211, 238, 0.06), transparent);
      border-radius: 0 8px 8px 0;
      padding: 12px 16px;
    }

    .article-content {
      font-size: 17px;
      line-height: 1.9;
      color: #D3DEE8;
      padding-top: 8px;
    }

    .article-content p {
      margin-bottom: 24px;
    }

    .article-content h2 {
      font-size: 28px;
      color: var(--text);
      margin: 40px 0 16px;
      padding-left: 12px;
      border-left: 4px solid var(--primary);
      line-height: 1.4;
    }

    .article-content h3 {
      font-size: 22px;
      color: var(--text);
      margin: 32px 0 12px;
    }

    .article-content ul,
    .article-content ol {
      margin: 0 0 24px;
      padding-left: 24px;
    }

    .article-content li {
      margin-bottom: 8px;
    }

    .article-content a {
      color: var(--primary);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .article-content a:hover {
      color: var(--accent);
    }

    .article-content img {
      max-width: 100%;
      border-radius: var(--radius);
      margin: 24px auto;
      display: block;
      box-shadow: var(--shadow);
    }

    .article-content blockquote {
      border-left: 3px solid var(--primary);
      background: rgba(34, 211, 238, 0.08);
      padding: 16px 20px;
      border-radius: 0 var(--radius) var(--radius) 0;
      color: #C0CDDA;
      margin-bottom: 24px;
    }

    .article-content code {
      background: rgba(0, 0, 0, 0.35);
      padding: 2px 8px;
      border-radius: 6px;
      font-family: var(--font-mono);
      font-size: 14px;
      color: var(--primary);
    }

    .article-content pre {
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 16px;
      overflow-x: auto;
      margin-bottom: 24px;
      font-family: var(--font-mono);
      font-size: 14px;
      line-height: 1.7;
    }

    .article-content pre code {
      background: none;
      padding: 0;
      color: #E5EDF5;
    }

    .cta-card {
      display: flex;
      align-items: center;
      gap: 20px;
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(163, 230, 53, 0.08));
      border: 1px solid rgba(34, 211, 238, 0.3);
      border-radius: var(--radius);
      padding: 20px 24px;
      margin: 40px 0;
    }

    .cta-card .cta-icon {
      flex: 0 0 64px;
      height: 64px;
      border-radius: 14px;
      overflow: hidden;
      box-shadow: var(--shadow);
    }

    .cta-card .cta-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .cta-card .cta-text {
      flex: 1;
    }

    .cta-card h3 {
      font-size: 20px;
      margin-bottom: 4px;
      color: var(--text);
    }

    .cta-card p {
      font-size: 14px;
      color: var(--text-weak);
      margin: 0;
    }

    .related-section {
      margin-top: 40px;
      padding-top: 32px;
      border-top: 1px solid var(--border);
    }

    .related-section h2 {
      font-size: 24px;
      margin-bottom: 20px;
    }

    .related-empty {
      text-align: center;
      background: var(--bg-elevated);
      border: 1px dashed var(--border);
      border-radius: var(--radius);
      padding: 40px 24px;
      color: var(--text-weak);
    }

    .related-empty p {
      margin-bottom: 16px;
    }

    .text-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }

    .text-link:hover {
      color: var(--accent);
    }

    .comment-placeholder {
      margin-top: 32px;
      padding: 20px;
      border: 1px dashed var(--border);
      border-radius: var(--radius);
      min-height: 80px;
    }

    .article-not-found {
      text-align: center;
      padding: 72px 20px;
      background: var(--bg-elevated);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
    }

    .article-not-found h1 {
      font-size: 28px;
      margin-bottom: 16px;
    }

    .article-not-found p {
      color: var(--text-weak);
      margin-bottom: 24px;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: rgba(5, 12, 23, 0.95);
      border-top: 1px solid var(--border);
      padding-top: 48px;
      margin-top: 96px;
    }

    .footer-brand {
      margin-bottom: 24px;
    }

    .footer-brand p {
      color: var(--text-weak);
      font-size: 14px;
      line-height: 1.8;
      margin-top: 16px;
      padding-right: 16px;
    }

    .footer-col h4 {
      font-size: 14px;
      color: var(--text-weak);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

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

    .footer-col ul li a {
      color: var(--text-muted);
      font-size: 14px;
      transition: color 0.2s, padding-left 0.2s;
    }

    .footer-col ul li a:hover {
      color: var(--text);
      padding-left: 8px;
    }

    .contact-line {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 10px;
    }

    .contact-line i {
      color: var(--primary);
      width: 16px;
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      margin-top: 32px;
      padding: 16px 0;
    }

    .copyright {
      font-size: 12px;
      color: var(--text-muted);
      text-align: center;
    }

    /* ===== 响应式 ===== */
    @media screen and (max-width: 1024px) {
      .header-nav {
        gap: 16px;
      }
      .search-box {
        width: 160px;
      }
      .search-box:hover {
        width: 200px;
      }
      .footer-col {
        margin-bottom: 24px;
      }
    }

    @media screen and (max-width: 767px) {
      .site-header {
        height: auto;
        padding: 12px 0;
      }

      .header-inner {
        flex-wrap: wrap;
        gap: 12px;
      }

      .header-nav {
        order: 3;
        width: 100%;
        position: static;
        display: none;
        flex-direction: column;
        gap: 0;
        background: rgba(8, 17, 31, 0.98);
        padding: 8px 0;
        border-top: 1px solid var(--border);
      }

      .header-nav.is-open {
        display: flex;
      }

      .header-nav a {
        padding: 12px 8px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      }

      .header-nav a.active::after {
        display: none;
      }

      .header-actions {
        margin-left: auto;
      }

      .search-box {
        width: 40px;
        padding: 6px 8px;
      }

      .search-box input,
      .search-box .kbd {
        display: none;
      }

      .search-box:hover {
        width: 40px;
      }

      .header-cta {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
      }

      .btn-sm {
        display: none;
      }

      .article-main {
        padding: 20px 16px;
      }

      .article-wrap {
        padding: 20px 16px;
      }

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

      .article-meta {
        gap: 10px;
      }

      .article-content {
        font-size: 16px;
      }

      .article-content h2 {
        font-size: 24px;
      }

      .cta-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px;
      }

      .cta-card .cta-icon {
        width: 100%;
        height: 120px;
        border-radius: 10px;
      }

      .site-footer {
        padding-top: 32px;
      }
    }

    @media screen and (max-width: 520px) {
      .breadcrumb {
        gap: 6px;
        font-size: 13px;
      }
      .breadcrumb .current {
        max-width: 160px;
      }
      .article-meta {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-bottom .copyright {
        line-height: 1.6;
      }
    }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --bg-base: #08111F;
  --bg-elevated: rgba(255, 255, 255, 0.04);
  --bg-highlight: rgba(34, 211, 238, 0.08);
  --primary: #22D3EE;
  --primary-light: #67E8F9;
  --primary-glow: rgba(34, 211, 238, 0.35);
  --accent: #A3E635;
  --text-strong: #F1F5F9;
  --text-body: #C7D2E2;
  --text-weak: #7E8CA6;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-panel: 24px;
  --radius-tag: 999px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.4);
  --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-en: "Inter", "SF Pro Display", -apple-system, sans-serif;
  --section-space: 96px;
  --section-space-sm: 56px;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-base);
  color: var(--text-body);
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease; }
ul, ol { list-style: none; }
input, button, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
button { cursor: pointer; background: none; }
h1, h2, h3, h4, h5 { color: var(--text-strong); line-height: 1.3; font-weight: 700; }

/* ===== 通用布局 ===== */
.grid-container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 56px 0; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }

/* ===== 按钮与标签 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
  line-height: 1.4;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--primary);
  color: #04121D;
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.28);
}
.btn-primary:hover {
  background: var(--primary-light);
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.5);
  transform: translateY(-1px);
  color: #04121D;
}
.btn-primary:active { transform: translateY(1px); box-shadow: 0 0 12px rgba(34,211,238,0.3); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-strong);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--primary);
  background: rgba(34, 211, 238, 0.08);
  color: var(--primary);
}
.btn-sm { padding: 9px 18px; font-size: 14px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  letter-spacing: 0.3px;
}
.tag-primary {
  background: rgba(34, 211, 238, 0.14);
  color: var(--primary);
}
.tag-accent {
  background: rgba(163, 230, 53, 0.14);
  color: var(--accent);
}
.tag-soft {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-weak);
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(8, 17, 31, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: 0.2px;
  flex-shrink: 0;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.9);
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.header-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s ease;
}
.header-nav a:hover { color: var(--text-strong); }
.header-nav a.active {
  color: var(--text-strong);
}
.header-nav a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -4px;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.8);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 160px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  transition: all 0.35s ease;
  cursor: text;
}
.search-box:hover { border-color: rgba(34, 211, 238, 0.4); }
.search-box:focus-within {
  width: 260px;
  border-color: rgba(34, 211, 238, 0.6);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}
.search-box i { color: var(--text-weak); font-size: 14px; }
.search-box input {
  background: transparent;
  border: none;
  color: var(--text-strong);
  font-size: 14px;
  width: 100%;
}
.search-box input::placeholder { color: var(--text-weak); }
.search-kbd {
  font-size: 11px;
  font-family: var(--font-en);
  color: var(--text-weak);
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0;
  transition: opacity 0.2s ease;
  white-space: nowrap;
}
.search-box:hover .search-kbd { opacity: 1; }
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  align-items: center;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-strong);
  transition: all 0.3s ease;
}

/* ===== 分类页 Hero ===== */
.page-hero {
  position: relative;
  padding: 72px 0 64px;
  background: var(--bg-base);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; }
.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 22px;
}
.hero-breadcrumb a { color: var(--text-weak); }
.hero-breadcrumb a:hover { color: var(--primary); }
.hero-breadcrumb .sep { opacity: 0.5; }
.page-hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.page-hero .hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-body);
  max-width: 640px;
  margin-bottom: 24px;
}
.hero-meta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-panel {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-card);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}
.hero-panel img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  opacity: 0.85;
}
.hero-panel-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 10px 16px;
  background: rgba(8, 17, 31, 0.7);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 13px;
  color: var(--text-strong);
  font-weight: 600;
}

/* ===== 分类主体 ===== */
.category-main { padding: 72px 0 96px; position: relative; }
.category-main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), transparent);
  max-width: 1200px;
}
.section-head { margin-bottom: 40px; }
.section-head .section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-head h2 { font-size: 32px; margin-bottom: 12px; }
.section-head p { font-size: 16px; color: var(--text-weak); max-width: 560px; line-height: 1.8; }

/* 主题卡片 */
.theme-card {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--bg-elevated);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease;
  margin-bottom: 24px;
}
.theme-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, 0.35);
  background: rgba(255, 255, 255, 0.06);
}
.theme-thumb {
  flex: 0 0 240px;
  overflow: hidden;
  position: relative;
  min-height: 200px;
}
.theme-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.theme-card:hover .theme-thumb img { transform: scale(1.04); }
.theme-body {
  flex: 1;
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.theme-body .tag { margin-bottom: 12px; }
.theme-body h3 { font-size: 21px; margin-bottom: 10px; }
.theme-body p { font-size: 15px; line-height: 1.75; color: var(--text-weak); margin-bottom: 16px; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
  transition: gap 0.25s ease;
}
.text-link:hover { gap: 10px; color: var(--primary-light); }
.theme-card.is-reverse .theme-thumb { order: 2; }
.theme-card.is-reverse .theme-body { order: 1; }

/* 流程面板 */
.process-panel {
  margin: 36px 0 44px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-panel);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
}
.process-panel::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(163, 230, 53, 0.1) 0%, transparent 70%);
  pointer-events: none;
}
.process-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.process-num {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  color: #04121D;
  background: var(--accent);
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  letter-spacing: 0.5px;
}
.process-head h3 { font-size: 22px; }
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step {
  position: relative;
  padding: 20px 18px;
  background: rgba(8, 17, 31, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-card);
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.step:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-2px);
}
.step-index {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  display: inline-block;
  margin-bottom: 10px;
  letter-spacing: 1px;
}
.step h4 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--text-weak); line-height: 1.6; }

/* ===== 侧边栏 ===== */
.sidebar { position: sticky; top: 96px; }
.side-block {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 24px;
}
.side-block h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.side-nav li { margin-bottom: 2px; }
.side-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 10px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--text-body);
  transition: all 0.25s ease;
}
.side-nav a:hover {
  background: rgba(34, 211, 238, 0.08);
  color: var(--primary);
  padding-left: 14px;
}
.side-nav a i { font-size: 11px; color: var(--text-weak); }
.side-nav a:hover i { color: var(--primary); }
.rel-card {
  display: flex;
  gap: 14px;
  padding: 16px 14px;
  background: rgba(8, 17, 31, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  margin-bottom: 12px;
  transition: all 0.3s ease;
}
.rel-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  background: rgba(8, 17, 31, 0.8);
}
.rel-card > i {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 211, 238, 0.12);
  color: var(--primary);
  border-radius: 10px;
  font-size: 15px;
}
.rel-card div span {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 2px;
}
.rel-card div p { font-size: 13px; color: var(--text-weak); line-height: 1.5; }

/* ===== FAQ ===== */
.faq-section {
  padding: 96px 0;
  background: rgba(255, 255, 255, 0.018);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.faq-section .section-head { text-align: center; }
.faq-section .section-head p { margin: 0 auto; }
.accordion {
  max-width: 800px;
  margin: 0 auto;
  background: transparent;
  border: none;
}
.accordion .accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 0;
}
.accordion .accordion-item:last-child { border-bottom: none; }
.accordion .accordion-title {
  background: transparent;
  border: none;
  color: var(--text-strong);
  font-size: 17px;
  font-weight: 600;
  padding: 22px 46px 22px 0;
  line-height: 1.5;
  position: relative;
  transition: color 0.25s ease;
}
.accordion .accordion-title:hover,
.accordion .accordion-title:focus {
  background: transparent;
  color: var(--primary);
}
.accordion .accordion-title::before {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 400;
  color: var(--text-weak);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  transition: all 0.35s ease;
}
.accordion .accordion-item.is-active .accordion-title::before {
  content: "×";
  transform: translateY(-50%) rotate(180deg);
  color: var(--primary);
  background: rgba(34, 211, 238, 0.12);
}
.accordion .accordion-content {
  background: transparent;
  border: none;
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.8;
  padding: 0 20px 24px 0;
}
.accordion .accordion-content p { color: var(--text-weak); }

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  background: var(--bg-base);
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(34, 211, 238, 0.14) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 70%, rgba(163, 230, 53, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
.cta-panel {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-panel);
  padding: 44px 48px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}
.cta-copy h2 { font-size: 26px; margin-bottom: 10px; }
.cta-copy p { color: var(--text-weak); font-size: 15px; max-width: 520px; }
.cta-btn-group { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.site-footer {
  background: #050B15;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 0;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 14px;
  color: var(--text-weak);
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: #A8B3C7;
  transition: all 0.25s ease;
  display: inline-block;
}
.footer-col ul li a:hover {
  color: var(--text-strong);
  padding-left: 6px;
  border-left: 2px solid var(--primary);
}
.contact-line {
  font-size: 14px;
  color: #A8B3C7;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.contact-line i { color: var(--text-weak); font-size: 14px; }
.footer-bottom {
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
}
.copyright {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
  letter-spacing: 0.3px;
}

/* ===== Responsive ===== */
@media screen and (max-width: 1023px) {
  .theme-thumb { flex-basis: 200px; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .search-box { width: 140px; }
  .search-box:focus-within { width: 200px; }
}

@media screen and (max-width: 767px) {
  :root { --section-space: 56px; }
  .section { padding: 56px 0; }
  .page-hero { padding: 48px 0 44px; }
  .page-hero h1 { font-size: 32px; }
  .page-hero .hero-desc { font-size: 15px; }
  .hero-panel { margin-top: 28px; }
  .hero-panel img { height: 200px; }

  .site-header { height: 64px; }
  .site-header-inner { height: 64px; }
  .header-actions .btn { display: none; }
  .header-actions .search-box { width: 40px; padding: 8px 10px; }
  .header-actions .search-box input { display: none; }
  .header-actions .search-box:focus-within { width: 40px; }
  .menu-toggle { display: flex; }
  .header-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(8, 17, 31, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 20px 24px 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
    z-index: 99;
  }
  .header-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .header-nav a { font-size: 16px; padding: 10px 2px; width: 100%; }
  .header-nav a.active::after { left: 0; transform: none; }

  .category-main { padding: 48px 0 64px; }
  .section-head h2 { font-size: 26px; }
  .theme-card { flex-direction: column; }
  .theme-thumb { flex-basis: auto; min-height: 180px; }
  .theme-thumb img { height: 180px; }
  .theme-card.is-reverse .theme-thumb { order: 0; }
  .theme-card.is-reverse .theme-body { order: 0; }
  .theme-body { padding: 24px; }
  .theme-body h3 { font-size: 19px; }

  .process-steps { grid-template-columns: 1fr; }
  .process-panel { padding: 28px 22px; }

  .sidebar { position: static; margin-top: 12px; }

  .faq-section { padding: 56px 0; }
  .accordion .accordion-title { font-size: 16px; }

  .cta-section { padding: 56px 0; }
  .cta-panel { padding: 32px 24px; flex-direction: column; align-items: flex-start; }
  .cta-btn-group .btn { width: 100%; }

  .site-footer { padding-top: 48px; }
  .footer-brand { margin-bottom: 28px; }
  .footer-col { margin-bottom: 28px; }
}

@media screen and (max-width: 520px) {
  .header-actions .search-box { display: none; }
  .header-actions { gap: 8px; }
  .process-head { flex-wrap: wrap; }
  .page-hero { padding: 40px 0 36px; }
  .hero-meta .tag { font-size: 11px; }
  .cta-copy h2 { font-size: 22px; }
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root {
  --bg-base: #08111F;
  --bg-elevated: rgba(255,255,255,0.05);
  --bg-highlight: rgba(34,211,238,0.08);
  --primary: #22D3EE;
  --primary-strong: #67E8F9;
  --accent: #A3E635;
  --text-main: #E6EDF5;
  --text-dim: #8CA3B8;
  --text-weak: #5A6E82;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-btn: 12px;
  --radius-tag: 999px;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.25);
  --glow: 0 0 20px rgba(34,211,238,0.4);
  --section-gap: 96px;
  --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-num: Inter, "SF Pro Display", "Segoe UI", system-ui, sans-serif;
}

/* ===== Reset / Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
img {
  max-width: 100%;
  display: block;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-main);
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ===== 布局容器 ===== */
.grid-container {
  max-width: 1200px;
  padding-left: 24px;
  padding-right: 24px;
}
.grid-x > .cell {
  min-width: 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #062630;
  box-shadow: var(--glow);
}
.btn-primary:hover {
  background: var(--primary-strong);
  box-shadow: 0 0 28px rgba(34,211,238,0.55);
  transform: translateY(-1px);
  color: #062630;
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 12px rgba(34,211,238,0.3);
}
.btn-ghost {
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
  border-color: rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--primary);
  background: rgba(34,211,238,0.08);
  color: var(--primary-strong);
}
.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
  border-radius: 14px;
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 10px;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  background: rgba(34,211,238,0.14);
  color: var(--primary-strong);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

/* ===== Header / 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(8,17,31,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.site-header .grid-container {
  height: 100%;
}
.site-header .grid-x {
  height: 100%;
  flex-wrap: nowrap;
  align-items: center;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--text-main);
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(34,211,238,0.8);
  flex-shrink: 0;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 72px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.header-nav::-webkit-scrollbar {
  display: none;
}
.header-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
  border-radius: 10px;
  transition: color 0.2s ease, background 0.2s ease;
}
.header-nav a:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.04);
}
.header-nav a.active {
  color: var(--primary-strong);
}
.header-nav a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 2px;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(34,211,238,0.7);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 16px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 160px;
  height: 38px;
  padding: 0 12px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  transition: width 0.3s ease, border-color 0.2s ease, background 0.2s ease;
}
.search-box i {
  font-size: 14px;
  color: var(--text-dim);
}
.search-box input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14px;
}
.search-box input::placeholder {
  color: var(--text-weak);
}
.kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.4;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.search-box:hover {
  width: 260px;
  border-color: rgba(34,211,238,0.4);
  background: rgba(255,255,255,0.1);
}
.search-box:hover .kbd {
  opacity: 1;
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 14px;
  transition: all 0.2s ease;
}
.icon-btn:hover {
  color: var(--primary);
  border-color: rgba(34,211,238,0.4);
  background: rgba(34,211,238,0.08);
}

/* ===== 分类 Hero ===== */
.category-hero {
  position: relative;
  padding: 88px 0 72px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.category-hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 90%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 90%);
}
.category-hero .grid-container {
  position: relative;
  z-index: 1;
}
.category-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 16px;
  border-radius: var(--radius-tag);
  background: rgba(163,230,53,0.12);
  border: 1px solid rgba(163,230,53,0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.category-hero h1 {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  line-height: 1.25;
  background: linear-gradient(135deg, #E6EDF5 0%, #67E8F9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.category-hero p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 32px;
}
.category-hero .btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.category-hero-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  background: rgba(255,255,255,0.04);
  padding: 10px;
}
.category-hero-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 18px;
}
.category-hero-card::after {
  content: "华体会手机网页版 · 技巧进阶";
  display: block;
  padding: 14px 12px 6px;
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
}

/* ===== 数据条 ===== */
.stats-bar {
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.stats-list {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.stats-item {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
  min-width: 180px;
  padding: 8px 0;
}
.stats-item + .stats-item {
  border-left: 1px solid var(--border);
  padding-left: 32px;
}
.stats-num {
  font-family: var(--font-num);
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  text-shadow: 0 0 20px rgba(34,211,238,0.35);
  line-height: 1.1;
  letter-spacing: -1px;
}
.stats-label {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.4;
}

/* ===== 主体两列 ===== */
.topic-section {
  padding: var(--section-gap) 0 64px;
}
.section-head {
  margin-bottom: 40px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 0;
}
.section-head.center {
  text-align: center;
}
.section-head.center p {
  margin: 0 auto;
  max-width: 480px;
}

/* 主题卡片 */
.topic-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.topic-card {
  display: flex;
  align-items: stretch;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.topic-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.topic-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(34,211,238,0.3);
  box-shadow: var(--shadow);
}
.topic-card:hover::before {
  opacity: 1;
}
.topic-card:hover h3 {
  color: var(--primary-strong);
}
.topic-card.reverse {
  flex-direction: row-reverse;
}
.topic-media {
  flex: 0 0 240px;
  max-width: 240px;
  overflow: hidden;
}
.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.topic-card:hover .topic-media img {
  transform: scale(1.04);
}
.topic-body {
  flex: 1;
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}
.topic-body .tag {
  margin-bottom: 14px;
}
.topic-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}
.topic-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
  margin-bottom: 18px;
}
.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.topic-link i {
  transition: transform 0.2s ease;
}
.topic-link:hover {
  color: var(--primary-strong);
}
.topic-link:hover i {
  transform: translateX(4px);
}

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.side-block {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.side-block h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.side-nav li + li {
  margin-top: 6px;
}
.side-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.side-nav a:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.05);
  border-color: var(--border);
}
.side-nav a i {
  font-size: 12px;
  color: var(--text-weak);
  transition: transform 0.2s ease, color 0.2s ease;
}
.side-nav a:hover i {
  transform: translateX(3px);
  color: var(--primary);
}
.side-nav li.active a {
  color: var(--primary-strong);
  background: rgba(34,211,238,0.08);
  border-color: rgba(34,211,238,0.2);
}
.resource-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.resource-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border-radius: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  transition: all 0.25s ease;
}
.resource-card:hover {
  background: rgba(34,211,238,0.06);
  border-color: rgba(34,211,238,0.3);
  transform: translateX(3px);
}
.resource-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(34,211,238,0.12);
  color: var(--primary);
  font-size: 16px;
}
.resource-card h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}
.resource-card p {
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 0;
  line-height: 1.4;
}

/* ===== 适用场景 ===== */
.scenarios-section {
  padding: var(--section-gap) 0;
  background: rgba(255,255,255,0.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.scenario-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  height: 100%;
  transition: all 0.3s ease;
}
.scenario-card:hover {
  background: rgba(34,211,238,0.06);
  border-color: rgba(34,211,238,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.scenario-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(34,211,238,0.12);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 20px;
}
.scenario-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== 流程 ===== */
.process-section {
  padding: var(--section-gap) 0;
}
.process-steps {
  display: flex;
  gap: 24px;
}
.process-step {
  flex: 1;
  position: relative;
  padding: 32px 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}
.process-step:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(34,211,238,0.25);
}
.step-num {
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 800;
  color: rgba(34,211,238,0.35);
  line-height: 1;
  margin-bottom: 20px;
  display: block;
  transition: color 0.3s ease;
}
.process-step:hover .step-num {
  color: var(--primary);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--section-gap) 0;
  background: rgba(8,17,31,0.6);
  border-top: 1px solid var(--border);
}
.faq-section .section-head {
  margin-bottom: 24px;
}
.accordion {
  background: transparent;
  border: none;
  margin: 0;
}
.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
}
.accordion-item:last-child {
  border-bottom: none;
}
.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
}
.accordion-title:hover {
  color: var(--primary-strong);
  background: transparent;
}
.accordion-title::before,
.accordion-title::after {
  content: none;
}
.accordion-title .acc-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 16px;
  font-style: normal;
  transition: transform 0.3s ease, background 0.3s ease;
}
.accordion-item.is-active .accordion-title {
  color: var(--primary-strong);
}
.accordion-item.is-active .accordion-title .acc-icon {
  transform: rotate(225deg);
  background: rgba(34,211,238,0.14);
  border-color: rgba(34,211,238,0.3);
}
.accordion-content {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
  padding: 0 8px 24px;
}
.accordion-content p:last-child {
  margin-bottom: 0;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: var(--section-gap) 0;
  overflow: hidden;
  background: #050B15;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
  opacity: 0.25;
  filter: grayscale(20%);
}
.cta-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,17,31,0.65) 0%, rgba(8,17,31,0.9) 100%);
}
.cta-panel {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.cta-panel h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 10px;
}
.cta-panel p {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 0;
}
.cta-panel .btn-wrap {
  text-align: right;
}

/* ===== Footer ===== */
.site-footer {
  background: #050B15;
  border-top: 1px solid var(--border);
  padding-top: 64px;
}
.site-footer .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 0;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease, padding-left 0.2s ease;
  position: relative;
}
.footer-col ul a:hover {
  color: #fff;
  padding-left: 12px;
}
.footer-col ul a:hover::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
}
.contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.contact-line i {
  color: var(--primary);
  width: 16px;
  text-align: center;
}
.footer-bottom {
  margin-top: 56px;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.copyright {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root {
    --section-gap: 72px;
  }
  .topic-media {
    flex-basis: 200px;
    max-width: 200px;
  }
  .stats-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .stats-item + .stats-item {
    padding-left: 20px;
  }
  .stats-num {
    font-size: 34px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 56px;
  }
  .site-header {
    height: auto;
    min-height: 64px;
    padding: 10px 0;
  }
  .site-header .grid-x {
    flex-wrap: wrap;
    gap: 8px;
  }
  .header-nav {
    order: 3;
    width: 100%;
    height: auto;
    padding-bottom: 4px;
  }
  .header-nav a {
    padding: 6px 12px;
    font-size: 13px;
  }
  .search-box {
    width: 38px;
    padding: 0 10px;
  }
  .search-box input {
    display: none;
  }
  .search-box:hover {
    width: 38px;
  }
  .kbd {
    display: none;
  }
  .icon-btn {
    display: none;
  }
  .btn-sm {
    padding: 6px 14px;
    font-size: 13px;
  }
  .category-hero {
    padding: 56px 0 48px;
  }
  .category-hero h1 {
    font-size: 34px;
  }
  .category-hero-card {
    margin-top: 28px;
  }
  .category-hero-card img {
    height: 200px;
  }
  .stats-list {
    flex-direction: column;
    gap: 8px;
  }
  .stats-item + .stats-item {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border);
    padding-top: 16px;
  }
  .stats-num {
    font-size: 30px;
  }
  .topic-card,
  .topic-card.reverse {
    flex-direction: column;
  }
  .topic-media {
    flex-basis: auto;
    max-width: 100%;
    height: 190px;
  }
  .topic-media img {
    height: 100%;
  }
  .topic-body {
    padding: 22px;
  }
  .sidebar {
    position: static;
    margin-top: 24px;
  }
  .process-steps {
    flex-direction: column;
    gap: 16px;
  }
  .process-step {
    padding: 24px;
  }
  .cta-panel {
    padding: 36px 24px;
  }
  .cta-panel .btn-wrap {
    text-align: left;
    margin-top: 20px;
  }
  .footer-col {
    margin-bottom: 28px;
  }
}

@media (max-width: 520px) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .category-hero h1 {
    font-size: 30px;
  }
  .category-hero p {
    font-size: 15px;
  }
  .btn-group {
    flex-direction: column;
  }
  .btn-group .btn {
    width: 100%;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .section-head p {
    font-size: 14px;
  }
  .scenario-card {
    padding: 24px 20px;
  }
  .cta-panel h2 {
    font-size: 24px;
  }
}