/* roulang page: index */
/* ===== 设计变量 ===== */
:root{
  --primary:#0a1628;
  --primary-light:#122a44;
  --primary-deep:#060e1c;
  --accent:#00d4ff;
  --accent-2:#7b61ff;
  --bg:#0b1a2e;
  --bg-card:rgba(18,42,68,.72);
  --bg-card-solid:#13263f;
  --text:#e8f0fe;
  --text-muted:#8aa3c0;
  --text-weak:#5f7a96;
  --border:rgba(94,148,200,.18);
  --radius:18px;
  --radius-sm:10px;
  --shadow:0 20px 50px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(0,212,255,.3);
  --glow-strong:0 0 40px rgba(0,212,255,.5);
  --spacing:100px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
}

/* ===== Reset & Base ===== */
*,*::before,*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{
  max-width:100%;
  display:block;
  border-radius:var(--radius-sm);
}
a{
  color:var(--accent);
  text-decoration:none;
  transition:color .25s ease;
}
a:hover{color:#66e7ff;}
ul{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}

/* ===== 容器 ===== */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media screen and (max-width:520px){
  .container{padding:0 16px;}
}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,22,40,.85);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:72px;
  gap:20px;
}
.brand{
  font-size:20px;
  font-weight:700;
  letter-spacing:.5px;
  color:#fff;
  white-space:nowrap;
  display:flex;
  align-items:center;
  gap:8px;
}
.brand i{
  color:var(--accent);
  font-size:22px;
}
.brand:hover{color:var(--accent);}
.site-nav{
  display:flex;
  align-items:center;
  gap:8px;
}
.nav-link{
  color:var(--text-muted);
  font-weight:500;
  padding:8px 18px;
  border-radius:50px;
  transition:all .25s ease;
}
.nav-link:hover{
  color:#fff;
  background:rgba(0,212,255,.08);
}
.nav-link.active{
  color:#fff;
  background:linear-gradient(135deg,rgba(0,212,255,.18),rgba(123,97,255,.14));
  border:1px solid rgba(0,212,255,.3);
}
.btn-nav{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
  background:linear-gradient(135deg,#00c6ff,#7b61ff);
  color:#fff;
  font-weight:600;
  padding:9px 22px;
  border-radius:50px;
  box-shadow:var(--glow);
  transition:all .3s ease;
}
.btn-nav:hover{
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--glow-strong);
}
.mobile-toggle{
  display:none;
  background:transparent;
  border:1px solid var(--border);
  color:#fff;
  width:44px;
  height:44px;
  border-radius:12px;
  font-size:18px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:all .25s ease;
}
.mobile-toggle:hover{
  border-color:var(--accent);
  color:var(--accent);
}
@media screen and (max-width:768px){
  .site-nav{
    position:absolute;
    top:72px;
    left:0;
    right:0;
    background:rgba(10,22,40,.97);
    flex-direction:column;
    align-items:stretch;
    padding:16px;
    gap:6px;
    border-bottom:1px solid var(--border);
    display:none;
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
  }
  .site-nav.open{display:flex;}
  .nav-link,.btn-nav{
    text-align:center;
    padding:12px 16px;
    margin-left:0;
  }
  .mobile-toggle{display:flex;}
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  border-radius:50px;
  padding:12px 30px;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .3s ease;
  font-size:15px;
}
.btn-primary{
  background:linear-gradient(135deg,#00c6ff,#7b61ff);
  color:#fff;
  box-shadow:var(--glow);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:var(--glow-strong);
  color:#fff;
}
.btn-outline{
  background:transparent;
  border-color:rgba(0,212,255,.4);
  color:var(--accent);
}
.btn-outline:hover{
  background:rgba(0,212,255,.08);
  border-color:var(--accent);
  color:#fff;
}
.btn-full{width:100%;justify-content:center;}
.btn-lg{padding:15px 40px;font-size:16px;}

/* ===== Hero 白皮书获客 ===== */
.hero{
  position:relative;
  padding:90px 0 120px;
  background:
    linear-gradient(rgba(6,14,28,.82),rgba(6,14,28,.92)),
    url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  overflow:hidden;
}
.hero::after{
  content:'';
  position:absolute;
  top:-120px;
  right:-80px;
  width:420px;
  height:420px;
  background:radial-gradient(circle,rgba(0,212,255,.18),transparent 70%);
  pointer-events:none;
}
.hero-inner{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:60px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(0,212,255,.08);
  border:1px solid rgba(0,212,255,.3);
  color:var(--accent);
  font-size:13px;
  font-weight:600;
  padding:6px 18px;
  border-radius:50px;
  margin-bottom:22px;
  letter-spacing:.5px;
}
.hero h1{
  font-size:38px;
  line-height:1.35;
  font-weight:800;
  color:#fff;
  letter-spacing:.5px;
  margin-bottom:20px;
}
.hero h1 .highlight{
  background:linear-gradient(120deg,#00d4ff,#7b61ff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc{
  font-size:16px;
  line-height:2;
  color:var(--text-muted);
  margin-bottom:34px;
  max-width:560px;
}
.hero-ctas{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-bottom:38px;
}
.hero-points{
  display:flex;
  gap:36px;
  flex-wrap:wrap;
}
.hero-points .point{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text-muted);
}
.hero-points .point i{
  color:var(--accent);
  font-size:18px;
}

/* Whitepaper 卡片 */
.whitepaper-card{
  position:relative;
  background:var(--bg-card);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border);
  border-radius:24px;
  padding:28px;
  box-shadow:var(--shadow);
}
.whitepaper-card::before{
  content:'';
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:120px;
  height:3px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  border-radius:0 0 8px 8px;
}
.whitepaper-cover{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  margin-bottom:22px;
  height:170px;
}
.whitepaper-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:16px;
}
.whitepaper-cover::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,14,28,.2),rgba(6,14,28,.85));
}
.whitepaper-cover .wp-label{
  position:absolute;
  left:18px;
  bottom:16px;
  z-index:2;
  color:#fff;
}
.whitepaper-cover .wp-label h3{
  font-size:18px;
  font-weight:700;
  line-height:1.4;
}
.whitepaper-cover .wp-label p{
  font-size:12px;
  color:rgba(232,240,254,.7);
}
.whitepaper-toc{
  margin-bottom:22px;
}
.whitepaper-toc h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:12px;
  display:flex;
  align-items:center;
  gap:8px;
}
.whitepaper-toc h4 i{color:var(--accent);}
.whitepaper-toc ul li{
  font-size:14px;
  color:var(--text-muted);
  padding:6px 0;
  border-bottom:1px dashed rgba(94,148,200,.15);
  display:flex;
  align-items:center;
  gap:8px;
}
.whitepaper-toc ul li:last-child{border-bottom:none;}
.whitepaper-toc ul li span{color:var(--accent);font-weight:600;}

/* ===== 通用板块 ===== */
.section{
  padding:var(--spacing) 0;
}
.section-alt{
  background:rgba(9,22,40,.45);
}
.section-head{
  margin-bottom:56px;
  max-width:640px;
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.section-tag{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--accent);
  background:rgba(0,212,255,.08);
  border:1px solid rgba(0,212,255,.25);
  padding:5px 16px;
  border-radius:50px;
  margin-bottom:14px;
}
.section-title{
  font-size:30px;
  font-weight:800;
  color:#fff;
  line-height:1.4;
  margin-bottom:12px;
}
.section-desc{
  font-size:15px;
  line-height:1.9;
  color:var(--text-muted);
}

/* ===== 服务矩阵 ===== */
.service-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.service-card{
  background:var(--bg-card);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px 30px;
  transition:all .35s ease;
  position:relative;
  overflow:hidden;
}
.service-card::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  opacity:0;
  transition:opacity .3s ease;
}
.service-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow);
  border-color:rgba(0,212,255,.35);
}
.service-card:hover::before{opacity:1;}
.service-icon{
  width:54px;
  height:54px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
  color:var(--accent);
  background:rgba(0,212,255,.1);
  margin-bottom:22px;
}
.service-card h3{
  font-size:20px;
  font-weight:700;
  color:#fff;
  margin-bottom:12px;
}
.service-card p{
  font-size:14px;
  line-height:1.85;
  color:var(--text-muted);
  margin-bottom:16px;
}
.service-link{
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.service-link i{transition:transform .25s ease;}
.service-link:hover i{transform:translateX(4px);}

/* ===== 数据条 ===== */
.data-strip{
  background:linear-gradient(135deg,rgba(0,212,255,.06),rgba(123,97,255,.06));
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.data-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  text-align:center;
  padding:64px 0;
}
.data-item .data-num{
  font-size:44px;
  font-weight:900;
  background:linear-gradient(135deg,#00d4ff,#7b61ff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  line-height:1.2;
}
.data-item .data-label{
  font-size:14px;
  color:var(--text-muted);
  margin-top:6px;
  letter-spacing:1px;
}

/* ===== 流程 ===== */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  counter-reset:step;
}
.step-item{
  background:rgba(10,22,40,.6);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px 30px;
  transition:all .3s ease;
  position:relative;
}
.step-item:hover{
  border-color:rgba(0,212,255,.35);
  transform:translateY(-4px);
}
.step-num{
  width:46px;
  height:46px;
  border-radius:50%;
  background:linear-gradient(135deg,#00c6ff,#7b61ff);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  color:#fff;
  font-size:18px;
  margin-bottom:20px;
  box-shadow:var(--glow);
}
.step-item h3{
  font-size:19px;
  font-weight:700;
  color:#fff;
  margin-bottom:10px;
}
.step-item p{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.85;
}

/* ===== 线索表单 ===== */
.reserve-section{
  background:
    linear-gradient(rgba(6,14,28,.9),rgba(6,14,28,.95)),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
}
.reserve-layout{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:60px;
  align-items:start;
}
.reserve-copy .section-title{margin-bottom:20px;}
.reserve-copy .section-desc{margin-bottom:28px;}
.reserve-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  margin-bottom:14px;
  font-size:14px;
  color:var(--text-muted);
}
.reserve-list li i{
  color:var(--accent);
  margin-top:5px;
  font-size:16px;
}
.form-panel{
  background:var(--bg-card);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border);
  border-radius:24px;
  padding:38px;
  box-shadow:var(--shadow);
}
.form-panel h3{
  font-size:22px;
  font-weight:700;
  color:#fff;
  margin-bottom:24px;
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.field{
  position:relative;
  margin-bottom:6px;
}
.field.full{grid-column:1/-1;}
.field label{
  display:block;
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:6px;
  font-weight:600;
}
.input,select,textarea{
  width:100%;
  background:rgba(6,14,28,.6);
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px 16px;
  color:var(--text);
  font-size:14px;
  transition:all .25s ease;
  appearance:none;
  -webkit-appearance:none;
}
.input:focus,select:focus,textarea:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(0,212,255,.15);
  background:rgba(6,14,28,.8);
}
.input::placeholder,textarea::placeholder{color:var(--text-weak);}
select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238aa3c0' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 16px center;
  padding-right:38px;
}
textarea{min-height:80px;resize:vertical;}
.form-note{
  font-size:12px;
  color:var(--text-weak);
  margin-top:14px;
  line-height:1.7;
  display:flex;
  align-items:center;
  gap:6px;
}
.form-note i{color:var(--accent);}

/* ===== 资讯区 ===== */
.news-layout{
  display:grid;
  grid-template-columns:1fr 340px;
  gap:48px;
}
.news-list .news-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  border-bottom:1px solid rgba(94,148,200,.14);
  transition:all .3s ease;
}
.news-list .news-item:hover{
  padding-left:12px;
  border-bottom-color:rgba(0,212,255,.3);
}
.news-item .news-cat{
  font-size:12px;
  color:var(--accent);
  font-weight:700;
  letter-spacing:1px;
  margin-bottom:6px;
}
.news-item .news-title{
  font-size:17px;
  font-weight:600;
  color:#eef5ff;
  line-height:1.5;
}
.news-item:hover .news-title{color:var(--accent);}
.news-item .news-date{
  font-size:13px;
  color:var(--text-weak);
  white-space:nowrap;
}
.news-sidebar .side-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:26px 24px;
  margin-bottom:24px;
}
.side-card h4{
  font-size:16px;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h4 i{color:var(--accent);}
.tag-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.tag{
  display:inline-block;
  font-size:13px;
  font-weight:500;
  color:var(--text-muted);
  background:rgba(0,212,255,.06);
  border:1px solid rgba(0,212,255,.2);
  padding:5px 14px;
  border-radius:50px;
  transition:all .25s ease;
}
.tag:hover{
  color:#fff;
  background:rgba(0,212,255,.15);
  border-color:var(--accent);
}
.side-link{
  display:flex;
  justify-content:space-between;
  align-items:center;
  color:var(--text-muted);
  font-size:14px;
  padding:9px 0;
  border-bottom:1px dashed rgba(94,148,200,.15);
  transition:all .25s ease;
}
.side-link:hover{color:var(--accent);}
.side-link:last-child{border-bottom:none;}

/* ===== FAQ ===== */
.faq-list{
  max-width:820px;
  margin:0 auto;
}
.faq-item{
  background:rgba(10,22,40,.6);
  border:1px solid var(--border);
  border-radius:16px;
  margin-bottom:16px;
  overflow:hidden;
  transition:border-color .3s ease;
}
.faq-item.active{
  border-color:rgba(0,212,255,.35);
}
.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  color:#e8f0fe;
  user-select:none;
}
.faq-q .icon{
  min-width:28px;
  height:28px;
  border-radius:50%;
  background:rgba(0,212,255,.1);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  color:var(--accent);
  transition:all .3s ease;
  flex-shrink:0;
}
.faq-item.active .faq-q .icon{
  transform:rotate(45deg);
  background:var(--accent);
  color:#0a1628;
}
.faq-a{
  display:none;
  padding:0 24px 22px;
  font-size:14px;
  color:var(--text-muted);
  line-height:1.95;
}
.faq-item.active .faq-a{display:block;}

/* ===== 隐私说明 ===== */
.privacy-panel{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:40px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.privacy-item{
  display:flex;
  gap:16px;
}
.privacy-item i{
  font-size:22px;
  color:var(--accent);
  margin-top:4px;
}
.privacy-item h4{
  font-size:16px;
  font-weight:700;
  color:#fff;
  margin-bottom:8px;
}
.privacy-item p{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.8;
}

/* ===== CTA ===== */
.cta-section{
  position:relative;
  padding:var(--spacing) 0;
  background:
    linear-gradient(rgba(6,14,28,.88),rgba(6,14,28,.92)),
    url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  text-align:center;
}
.cta-section .section-title{font-size:32px;}
.cta-actions{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
  margin-top:30px;
}
.cta-contact{
  font-size:14px;
  color:var(--text-muted);
  margin-top:18px;
}
.cta-contact strong{color:#fff;font-size:18px;}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--primary-deep);
  border-top:1px solid var(--border);
  padding:64px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .8fr .9fr;
  gap:48px;
  margin-bottom:40px;
}
.footer-brand{
  font-size:20px;
  font-weight:800;
  color:#fff;
  margin-bottom:12px;
}
.footer-brand i{color:var(--accent);margin-right:6px;}
.footer-desc{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.9;
  margin-bottom:16px;
}
.footer-social{
  display:flex;
  gap:10px;
}
.footer-social a{
  display:flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:50%;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  color:var(--text-muted);
  transition:all .25s ease;
}
.footer-social a:hover{
  color:#fff;
  background:var(--accent);
  border-color:var(--accent);
  transform:translateY(-2px);
}
.footer-title{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
}
.footer-links li{
  margin-bottom:10px;
}
.footer-links a{
  font-size:14px;
  color:var(--text-muted);
  transition:all .25s ease;
}
.footer-links a:hover{color:var(--accent);padding-left:4px;}
.footer-contact li{
  display:flex;
  gap:10px;
  margin-bottom:12px;
  font-size:14px;
  color:var(--text-muted);
  align-items:center;
}
.footer-contact i{
  color:var(--accent);
  width:16px;
}
.footer-bottom{
  border-top:1px solid rgba(94,148,200,.12);
  padding-top:24px;
  text-align:center;
  font-size:13px;
  color:var(--text-weak);
}
.footer-bottom a{color:var(--text-weak);}
.footer-bottom a:hover{color:var(--accent);}

/* ===== 浮动 CTA ===== */
.floating-cta{
  position:fixed;
  bottom:28px;
  right:28px;
  z-index:200;
  display:flex;
  align-items:center;
  gap:10px;
  background:linear-gradient(135deg,#00c6ff,#7b61ff);
  color:#fff;
  padding:14px 24px;
  border-radius:50px;
  font-weight:600;
  font-size:14px;
  box-shadow:var(--glow-strong);
  transition:all .3s ease;
}
.floating-cta:hover{
  transform:translateY(-3px);
  color:#fff;
  box-shadow:0 0 50px rgba(0,212,255,.6);
}
@media screen and (max-width:520px){
  .floating-cta{bottom:16px;right:16px;padding:12px 18px;font-size:13px;}
}

/* ===== 响应式 ===== */
@media screen and (max-width:1024px){
  :root{--spacing:80px;}
  .hero-inner{grid-template-columns:1fr;gap:44px;}
  .hero{padding:60px 0 80px;}
  .service-grid{grid-template-columns:repeat(2,1fr);}
  .data-grid{grid-template-columns:repeat(2,1fr);}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .reserve-layout{grid-template-columns:1fr;gap:36px;}
  .news-layout{grid-template-columns:1fr;}
  .privacy-panel{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media screen and (max-width:768px){
  .hero h1{font-size:28px;}
  .section-title{font-size:24px;}
  .service-grid,.steps-grid{grid-template-columns:1fr;}
  .data-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-points{flex-direction:column;gap:12px;}
}
@media screen and (max-width:520px){
  .hero h1{font-size:23px;}
  .hero-desc{font-size:15px;}
  .whitepaper-card{padding:20px;}
  .data-strip .data-grid{padding:44px 0;}
  .data-item .data-num{font-size:32px;}
  .form-panel{padding:26px 20px;}
  .privacy-panel{padding:26px 20px;}
  .news-item{flex-direction:column;align-items:flex-start;gap:6px;}
  .btn{width:100%;}
  .hero-ctas{flex-direction:column;}
  .cta-actions{flex-direction:column;}
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a1a2f;
            --primary-light: #132a44;
            --accent: #00d4ff;
            --accent-glow: rgba(0, 212, 255, 0.5);
            --accent-dark: #0099cc;
            --bg: #f0f5fa;
            --surface: #ffffff;
            --text: #0a1a2f;
            --text-weak: #5a6b7c;
            --border: rgba(10, 26, 47, 0.1);
            --radius: 20px;
            --radius-sm: 12px;
            --shadow: 0 10px 30px rgba(10, 26, 47, 0.06);
            --shadow-hover: 0 16px 40px rgba(10, 26, 47, 0.12);
            --transition: all 0.3s ease;
            --container-width: 1200px;
            --glass-bg: rgba(255, 255, 255, 0.75);
            --glass-border: rgba(255, 255, 255, 0.3);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        body.foundation {
            line-height: 1.7;
        }

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

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

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

        button {
            border: none;
            cursor: pointer;
            font-family: inherit;
            outline: none;
        }

        input,
        textarea,
        select {
            font-family: inherit;
            outline: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            background-color: var(--surface);
            transition: var(--transition);
            width: 100%;
            margin-bottom: 16px;
        }

        input:focus,
        textarea:focus,
        select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }

        .container {
            max-width: var(--container-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Navigation ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 2px 8px rgba(10, 26, 47, 0.04);
        }

        .site-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 72px;
            padding: 0 20px;
        }

        .nav-logo {
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .nav-logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }

        .nav-logo:hover {
            color: var(--accent-dark);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            font-weight: 600;
            color: var(--text-weak);
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            font-size: 1rem;
            transition: var(--transition);
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--text);
            border-bottom-color: var(--accent);
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 20px;
            border-radius: 50px;
            border: 1px solid var(--primary);
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(10, 26, 47, 0.15);
        }

        .btn-nav:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(0, 212, 255, 0.25);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            font-size: 2rem;
            color: var(--text);
            padding: 4px;
            line-height: 1;
        }

        /* ===== Hero (Data-Driven Flow - First Screen) ===== */
        .page-hero {
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 60%, #0b2239 100%);
            height: 380px;
            display: flex;
            align-items: flex-end;
            position: relative;
            padding-top: 60px;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 1;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 26, 47, 0.6) 0%, rgba(10, 26, 47, 0.2) 50%, rgba(10, 26, 47, 0.9) 100%);
            z-index: 2;
        }

        .page-hero .container {
            position: relative;
            z-index: 3;
            padding-bottom: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: 0;
            text-align: right;
        }

        .hero-eyebrow {
            color: var(--accent);
            font-size: 0.9rem;
            letter-spacing: 2px;
            text-transform: uppercase;
            font-weight: 700;
            margin-bottom: 8px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .page-hero h1 {
            color: #fff;
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .page-hero p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.2rem;
            max-width: 580px;
            margin-left: auto;
            line-height: 1.6;
        }

        /* ===== Metrics Dashboard ===== */
        .metrics-section {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 24px 0;
        }

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

        .metric-item {
            text-align: center;
            padding: 20px 12px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            backdrop-filter: blur(8px);
            box-shadow: 0 4px 12px rgba(10, 26, 47, 0.04);
        }

        .metric-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-dark) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .metric-label {
            color: var(--text-weak);
            font-size: 0.95rem;
            font-weight: 500;
        }

        /* ===== Section Headers ===== */
        .section {
            padding: 70px 0;
        }

        .section-header {
            max-width: 700px;
            margin-bottom: 45px;
        }

        .section-header.left {
            text-align: left;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-header p {
            color: var(--text-weak);
            font-size: 1.1rem;
        }

        /* ===== Service Matrix (Glass Cards) ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .service-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 40px 30px;
            backdrop-filter: blur(12px);
            box-shadow: 0 8px 24px rgba(10, 26, 47, 0.06);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-dark));
            opacity: 0.6;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(10, 26, 47, 0.12);
        }

        .service-card:hover::before {
            opacity: 1;
            height: 6px;
        }

        .service-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(145deg, var(--accent), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.6rem;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px var(--accent-glow);
        }

        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }

        .service-card p {
            color: var(--text-weak);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: auto;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 212, 255, 0.08);
            color: var(--accent-dark);
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(0, 212, 255, 0.2);
        }

        /* ===== Result Comparison ===== */
        .comparison-section {
            background: var(--primary);
            color: #fff;
            position: relative;
        }

        .comparison-section .section-header h2 {
            color: #fff;
        }

        .comparison-section .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .comparison-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 32px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .comparison-item.winner {
            background: linear-gradient(145deg, rgba(0, 212, 255, 0.1), rgba(255, 255, 255, 0.04));
            border-color: var(--accent-glow);
            box-shadow: 0 0 30px var(--accent-glow);
        }

        .comparison-item h3 {
            font-size: 1.2rem;
            margin-bottom: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .comparison-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .comparison-list li {
            padding: 8px 0;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .comparison-list i {
            color: var(--accent);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .comparison-list li.muted {
            color: rgba(255, 255, 255, 0.5);
        }

        .comparison-list li.muted i {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== Scenario Section ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 36px;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            gap: 20px;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .scenario-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(145deg, var(--accent), var(--accent-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            flex-shrink: 0;
        }

        .scenario-content h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .scenario-content p {
            color: var(--text-weak);
        }

        /* ===== Flow Timeline ===== */
        .flow-section {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            counter-reset: step;
        }

        .flow-step {
            text-align: center;
            position: relative;
            counter-increment: step;
        }

        .flow-step::before {
            content: counter(step);
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 20px;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 12px rgba(10, 26, 47, 0.2);
        }

        .flow-step::after {
            content: "";
            position: absolute;
            top: 24px;
            left: calc(-40%);
            right: calc(60%);
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            z-index: 1;
        }

        .flow-step:first-child::after {
            display: none;
        }

        .flow-step h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }

        .flow-step p {
            color: var(--text-weak);
            font-size: 0.95rem;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--surface);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

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

        .faq-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .faq-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h3 i {
            color: var(--accent);
        }

        .faq-item p {
            color: var(--text-weak);
            margin-bottom: 0;
        }

        /* ===== CTA Form Section ===== */
        .cta-section {
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            opacity: 0.15;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .cta-text h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-text p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 12px;
            max-width: 400px;
        }

        .cta-detail {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .cta-detail span {
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
        }

        .cta-detail i {
            color: var(--accent);
        }

        .cta-form {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
        }

        .cta-form h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .cta-form h3 i {
            color: var(--accent);
        }

        .form-row {
            margin-bottom: 4px;
        }

        .form-row label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 0.9rem;
            color: var(--text);
        }

        .btn-primary {
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 700;
            width: 100%;
            border: 1px solid transparent;
            transition: var(--transition);
            box-shadow: 0 4px 16px var(--accent-glow);
            font-size: 1rem;
            margin-top: 8px;
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px var(--accent-glow);
        }

        .btn-primary:focus {
            box-shadow: 0 0 0 4px var(--accent-glow);
        }

        .form-note {
            text-align: center;
            color: var(--text-weak);
            font-size: 0.8rem;
            margin-top: 12px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
            padding-bottom: 20px;
        }

        .site-footer a {
            color: rgba(255, 255, 255, 0.8);
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand i {
            color: var(--accent);
        }

        .footer-desc {
            margin-bottom: 16px;
            max-width: 300px;
            line-height: 1.6;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary);
        }

        .footer-title {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .footer-links {
            list-style: none;
            margin: 0;
        }

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

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-contact {
            list-style: none;
            margin: 0;
        }

        .footer-contact li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.9rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .page-hero h1 {
                font-size: 2.4rem;
            }

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

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

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

            .flow-step::after {
                display: none;
            }

            .cta-section .container {
                grid-template-columns: 1fr;
            }

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

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

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

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

        @media screen and (max-width: 768px) {
            .site-nav {
                flex-wrap: wrap;
                min-height: auto;
                padding: 12px 16px;
                position: relative;
            }

            .nav-logo {
                font-size: 1rem;
                max-width: 80%;
            }

            .nav-toggle {
                display: block;
                position: absolute;
                right: 16px;
                top: 12px;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                padding: 20px 0 8px;
                text-align: center;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links .nav-link {
                padding: 12px 0;
                border-bottom: 1px solid var(--border);
                color: var(--text);
                border-bottom: none;
            }

            .nav-links .nav-link:hover {
                color: var(--accent-dark);
            }

            .btn-nav {
                display: flex;
                justify-content: center;
                margin-top: 12px;
            }

            .page-hero {
                height: 300px;
                padding-top: 40px;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .page-hero p {
                font-size: 1rem;
            }

            .section {
                padding: 50px 0;
            }

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

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

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

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

        @media screen and (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .metric-number {
                font-size: 1.8rem;
            }

            .metric-item {
                padding: 16px 8px;
            }

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

            .cta-form {
                padding: 24px;
            }

            .page-hero h1 {
                font-size: 1.6rem;
            }

            .section-header h2 {
                font-size: 1.6rem;
            }

            .nav-logo {
                font-size: 0.9rem;
            }
        }