/* roulang page: index */
:root{
  --gold:#C9A55A;
  --gold-dark:#A9853F;
  --gold-light:rgba(201,165,90,.15);
  --dark:#0D0D0D;
  --dark-2:#121212;
  --panel:#1A1A1A;
  --light-bg:#F7F4EF;
  --brown:#5C3A2E;
  --wine:#8B2635;
  --text-main:#2A2A2A;
  --text-sub:#6B6B6B;
  --text-dark-bg:#E5DCC8;
  --text-dark-sub:rgba(229,220,200,.62);
  --border-gold:rgba(201,165,90,.4);
  --radius-card:8px;
  --radius-btn:6px;
  --radius-input:4px;
  --shadow-card:0 4px 20px rgba(0,0,0,.06);
  --shadow-dark:0 18px 50px rgba(0,0,0,.45);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --space-section:90px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  color:var(--text-main);
  background:#fff;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{text-decoration:none;color:inherit;transition:color .2s ease}
ul,ol{list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;outline:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-light{background:var(--light-bg)}
.section-dark{background:var(--dark)}
.section-head{text-align:center;margin-bottom:56px}
.section-head .section-tag{
  display:inline-block;font-size:13px;letter-spacing:2px;color:var(--gold-dark);
  background:var(--gold-light);border:1px solid var(--border-gold);
  border-radius:20px;padding:4px 16px;margin-bottom:14px;font-weight:600;
}
.section-head h2{
  font-family:var(--font-serif);font-size:32px;line-height:1.4;font-weight:700;color:var(--text-main);
}
.section-head p{color:var(--text-sub);font-size:15px;max-width:720px;margin:12px auto 0}
.section-dark .section-head h2{color:var(--text-dark-bg)}
.section-dark .section-head p{color:var(--text-dark-sub)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;padding:14px 30px;border-radius:var(--radius-btn);
  border:1px solid transparent;cursor:pointer;transition:all .22s ease;white-space:nowrap;
  min-height:44px;
}
.btn-primary{background:var(--gold);color:var(--dark)}
.btn-primary:hover{background:var(--gold-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(201,165,90,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:var(--gold);color:var(--gold)}
.btn-outline:hover{background:var(--gold);color:var(--dark);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-sm{padding:10px 20px;font-size:14px;min-height:38px}
.btn-lg{padding:16px 38px;font-size:16px}
.badge{
  display:inline-block;font-size:12px;line-height:1.4;font-weight:600;
  padding:3px 10px;border-radius:3px;border:1px solid var(--border-gold);
  color:var(--gold-dark);background:rgba(201,165,90,.08);
}
/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1000;width:100%;
  box-shadow:0 4px 20px rgba(0,0,0,.25);
}
.topbar{background:var(--dark);height:64px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:8px;border:1.5px solid var(--gold);
  display:flex;align-items:center;justify-content:center;position:relative;
  background:linear-gradient(135deg,rgba(201,165,90,.2),rgba(201,165,90,.05));
}
.brand-mark::before{
  content:"";display:block;width:14px;height:14px;border:2px solid var(--gold);
  border-top-color:transparent;border-right-color:transparent;transform:rotate(45deg);
}
.brand-text{font-size:20px;font-weight:700;color:#fff;letter-spacing:1px;font-family:var(--font-serif)}
.topbar-right{display:flex;align-items:center;gap:16px}
.search-box{
  display:flex;align-items:center;background:rgba(255,255,255,.08);
  border:1px solid var(--border-gold);border-radius:30px;padding:0 6px 0 16px;
  height:38px;width:260px;transition:border-color .2s ease;
}
.search-box:focus-within{border-color:var(--gold);background:rgba(255,255,255,.12)}
.search-box input{
  flex:1;background:transparent;border:none;color:#fff;font-size:14px;min-width:0;
}
.search-box input::placeholder{color:rgba(229,220,200,.5)}
.search-box button{
  background:var(--gold);border:none;width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--dark);cursor:pointer;
  transition:background .2s ease;font-size:13px;
}
.search-box button:hover{background:var(--gold-dark);color:#fff}
.main-nav{background:var(--panel);border-top:1px solid rgba(255,255,255,.05)}
.nav-tabs{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;height:46px}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tabs a{
  display:flex;align-items:center;height:46px;padding:0 20px;font-size:14px;color:rgba(229,220,200,.72);
  border-bottom:2px solid transparent;transition:all .22s ease;white-space:nowrap;position:relative;font-weight:500;
}
.nav-tabs a:hover{color:var(--gold)}
.nav-tabs a.active{color:#fff;border-bottom-color:var(--gold)}
.nav-tabs a:focus-visible{outline:2px solid var(--gold);outline-offset:-2px;border-radius:4px}
/* ===== Hero ===== */
.hero{
  position:relative;min-height:72vh;display:flex;align-items:center;
  background:var(--dark);overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.32;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(13,13,13,.96) 0%,rgba(13,13,13,.82) 45%,rgba(13,13,13,.55) 100%);
}
.hero-inner{
  position:relative;z-index:2;display:flex;align-items:center;gap:60px;
  padding:80px 24px;width:100%;max-width:var(--container);margin:0 auto;
}
.hero-content{flex:1.15;max-width:640px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:1px;
  color:var(--gold);border:1px solid var(--border-gold);border-radius:20px;
  padding:5px 16px;background:rgba(201,165,90,.08);margin-bottom:22px;
}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold)}
.hero h1{
  font-family:var(--font-serif);font-size:42px;line-height:1.35;font-weight:700;
  color:var(--text-dark-bg);margin-bottom:20px;letter-spacing:1px;
}
.hero h1 .gold-text{color:var(--gold);position:relative;white-space:nowrap}
.hero h1 .gold-text::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;
  background:rgba(201,165,90,.18);border-radius:4px;z-index:-1;
}
.hero-sub{font-size:17px;line-height:1.85;color:var(--text-dark-sub);margin-bottom:34px;max-width:540px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:36px}
.hero-points{display:flex;gap:24px;flex-wrap:wrap}
.hero-points li{
  display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-dark-sub);
}
.hero-points i{color:var(--gold);font-size:15px}
.hero-visual{flex:1;display:flex;justify-content:center;align-items:center;position:relative}
.phone-frame{
  width:270px;padding:12px;border-radius:38px;background:var(--panel);
  border:2px solid rgba(201,165,90,.55);box-shadow:var(--shadow-dark);
  position:relative;
}
.phone-frame::before{
  content:"";position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:76px;height:16px;border-radius:14px;background:var(--dark);z-index:3;
}
.phone-screen{border-radius:26px;overflow:hidden;line-height:0;position:relative}
.phone-screen img{width:100%;object-fit:cover;aspect-ratio:9/19}
.phone-caption{
  position:absolute;bottom:0;left:0;right:0;padding:40px 14px 14px;text-align:center;
  font-size:13px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.75));
  line-height:1.5;z-index:2;
}
.scroll-down{
  position:absolute;bottom:20px;left:50%;transform:translateX(-50%);
  color:rgba(229,220,200,.5);font-size:18px;z-index:3;
  animation:floatDown 2.2s ease-in-out infinite;display:flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--border-gold);border-radius:50%;
  transition:color .2s ease,border-color .2s ease;
}
.scroll-down:hover{color:var(--gold);border-color:var(--gold)}
@keyframes floatDown{
  0%,100%{transform:translate(-50%,0)}
  50%{transform:translate(-50%,8px)}
}
/* ===== Features ===== */
.features-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:28px;
}
.feature-card{
  background:#fff;border-radius:var(--radius-card);padding:34px 30px;
  border:1px solid rgba(0,0,0,.05);box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  position:relative;overflow:hidden;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;width:4px;height:0;background:var(--gold);
  transition:height .3s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 36px rgba(0,0,0,.1);border-color:var(--border-gold)}
.feature-card:hover::before{height:100%}
.feature-icon{
  width:52px;height:52px;border-radius:12px;background:var(--gold-light);
  border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;
  color:var(--gold-dark);font-size:20px;margin-bottom:18px;
}
.feature-card h3{font-size:17px;font-weight:700;color:var(--text-main);margin-bottom:8px;letter-spacing:.5px}
.feature-card p{font-size:14px;color:var(--text-sub);line-height:1.8}
/* ===== Stats band ===== */
.stats-band{
  background:var(--dark);position:relative;overflow:hidden;
}
.stats-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;opacity:.18;
}
.stats-inner{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  padding:70px 24px;max-width:var(--container);margin:0 auto;
}
.stat-item{text-align:center;padding:20px 10px;border-right:1px solid rgba(201,165,90,.15)}
.stat-item:last-child{border-right:none}
.stat-number{
  font-family:var(--font-serif);font-size:46px;font-weight:700;color:var(--gold);
  line-height:1.2;margin-bottom:6px;
}
.stat-label{font-size:14px;color:var(--text-dark-sub);letter-spacing:1px}
/* ===== Scenarios ===== */
.scenario-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:28px}
.scenario-main{
  border-radius:var(--radius-card);overflow:hidden;position:relative;
  box-shadow:var(--shadow-card);min-height:420px;display:block;background:var(--dark);
}
.scenario-main img{width:100%;height:100%;object-fit:cover;min-height:420px;transition:transform .5s ease}
.scenario-main:hover img{transform:scale(1.03)}
.scenario-overlay{
  position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(13,13,13,.88) 100%);
  display:flex;align-items:flex-end;padding:34px;color:#fff;
}
.scenario-overlay h3{font-family:var(--font-serif);font-size:20px;font-weight:600;margin-bottom:6px}
.scenario-overlay p{font-size:14px;color:rgba(229,220,200,.8);line-height:1.7}
.scenario-side{display:grid;grid-template-columns:1fr;gap:28px}
.scenario-mini{
  border-radius:var(--radius-card);display:flex;gap:20px;background:#fff;
  border:1px solid rgba(0,0,0,.05);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  padding:22px;align-items:center;
}
.scenario-mini:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(0,0,0,.1);border-color:var(--border-gold)}
.scenario-mini img{width:120px;height:120px;object-fit:cover;border-radius:6px;flex-shrink:0}
.scenario-mini h3{font-size:16px;font-weight:700;color:var(--text-main);margin-bottom:6px}
.scenario-mini p{font-size:14px;color:var(--text-sub);line-height:1.7}
/* ===== Process ===== */
.process-section{background:var(--dark);position:relative;overflow:hidden}
.process-section::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.14;
}
.process-wrap{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:var(--container);margin:0 auto;padding:0 24px}
.process-step{position:relative;text-align:center;padding:30px 16px;background:var(--panel);border:1px solid rgba(201,165,90,.18);border-radius:var(--radius-card);transition:transform .25s ease,border-color .25s ease}
.process-step:hover{transform:translateY(-4px);border-color:var(--border-gold)}
.process-step::after{
  content:"";position:absolute;top:50%;right:-20px;width:20px;height:2px;
  background:linear-gradient(90deg,var(--gold),transparent);
}
.process-step:last-child::after{display:none}
.step-number{
  width:48px;height:48px;border-radius:50%;background:var(--gold);color:var(--dark);
  font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;font-family:var(--font-serif);
}
.step-dot{width:8px;height:8px;border-radius:50%;background:var(--gold);margin:0 auto 16px}
.process-step h3{font-size:16px;font-weight:600;color:var(--text-dark-bg);margin-bottom:8px}
.process-step p{font-size:13px;color:var(--text-dark-sub);line-height:1.7}
/* ===== News ===== */
.news-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
}
.news-card{
  background:#fff;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid rgba(0,0,0,.05);box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-3px);box-shadow:0 12px 34px rgba(0,0,0,.1);border-color:var(--border-gold)}
.news-body{padding:26px 28px;display:flex;flex-direction:column;flex:1}
.news-card .badge{align-self:flex-start;margin-bottom:14px}
.news-title{font-size:17px;font-weight:700;color:var(--text-main);line-height:1.5;margin-bottom:10px;font-family:var(--font-serif)}
.news-card a.link-cover{color:inherit}
.news-card a.link-cover:hover .news-title{color:var(--gold-dark)}
.news-excerpt{
  font-size:14px;color:var(--text-sub);line-height:1.75;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  flex:1;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #f0ebe4;padding-top:14px}
.news-date{font-size:13px;color:var(--text-sub);display:flex;align-items:center;gap:6px}
.news-date i{color:var(--gold)}
.read-more{font-size:13px;font-weight:600;color:var(--gold-dark);display:flex;align-items:center;gap:6px}
.read-more i{transition:transform .2s ease}
.news-card:hover .read-more i{transform:translateX(4px)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:70px 20px;background:#fff;border-radius:var(--radius-card);
  border:1px dashed var(--border-gold);color:var(--text-sub);font-size:15px;
}
/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--light-bg);border-left:4px solid var(--gold);border-radius:0 var(--radius-card) var(--radius-card) 0;
  margin-bottom:16px;overflow:hidden;transition:background .25s ease;
}
.faq-item.open{background:#fff;box-shadow:var(--shadow-card)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 28px;background:transparent;border:none;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-main);line-height:1.5;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--gold-dark)}
.faq-q:focus-visible{outline:2px solid var(--gold);outline-offset:-2px;border-radius:0}
.faq-icon{
  width:30px;height:30px;border-radius:50%;border:1.5px solid var(--gold);color:var(--gold-dark);
  display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;
  transition:background .3s ease,color .3s ease,transform .3s ease;
}
.faq-item.open .faq-icon{background:var(--gold);color:var(--dark);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 28px 24px;font-size:14px;color:var(--text-sub);line-height:1.85}
/* ===== Contact ===== */
.contact-section{position:relative;overflow:hidden}
.contact-section::before{
  content:"";position:absolute;inset:0;background:var(--dark);opacity:.96;
  background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;
}
.contact-wrap{
  position:relative;display:grid;grid-template-columns:1fr 1fr;gap:50px;padding:80px 0;
  max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;
}
.contact-info h2{font-family:var(--font-serif);font-size:30px;color:var(--text-dark-bg);margin-bottom:16px;font-weight:700}
.contact-info>p{color:var(--text-dark-sub);font-size:15px;margin-bottom:34px;line-height:1.8}
.contact-list{display:grid;gap:22px}
.contact-list li{display:flex;gap:16px;align-items:flex-start}
.contact-icon{
  width:44px;height:44px;border-radius:10px;background:var(--gold-light);border:1px solid var(--border-gold);
  display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:17px;flex-shrink:0;
}
.contact-list h4{font-size:15px;color:var(--text-dark-bg);font-weight:600;margin-bottom:2px}
.contact-list p{font-size:14px;color:var(--text-dark-sub)}
.contact-form-wrap{background:#fff;border-radius:var(--radius-card);padding:38px;box-shadow:var(--shadow-dark)}
.contact-form-wrap h3{font-family:var(--font-serif);font-size:22px;font-weight:700;color:var(--text-main);margin-bottom:8px}
.contact-form-wrap>p{font-size:14px;color:var(--text-sub);margin-bottom:26px}
.contact-form .form-group{margin-bottom:18px}
.contact-form label{display:block;font-size:14px;font-weight:600;color:var(--text-main);margin-bottom:6px}
.contact-form input,.contact-form textarea{
  width:100%;background:#fff;border:1px solid #D8D0C4;border-radius:var(--radius-input);
  padding:12px 16px;font-size:15px;color:var(--text-main);transition:border-color .2s ease,box-shadow .2s ease;
}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:#a8a096}
.contact-form input:focus,.contact-form textarea:focus{
  border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,165,90,.18);
}
.contact-form textarea{resize:vertical;min-height:100px}
.contact-form .btn{width:100%;margin-top:6px}
.form-tip{font-size:13px;color:var(--text-sub);text-align:center;margin-top:12px}
/* ===== Footer ===== */
.site-footer{background:var(--dark);color:#9A9A9A;border-top:1px solid rgba(201,165,90,.15)}
.footer-top{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:50px;padding:70px 0 50px;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
.footer-brand .brand{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:18px}
.footer-brand .brand-text{font-size:22px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(229,220,200,.55);max-width:280px}
.footer-col h4{
  font-size:15px;color:var(--text-dark-bg);font-weight:600;margin-bottom:20px;letter-spacing:1px;
  position:relative;padding-bottom:10px;
}
.footer-col h4::after{
  content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--gold);
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(229,220,200,.55);transition:color .2s ease,padding-left .2s ease}
.footer-col a:hover{color:var(--gold);padding-left:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.06);padding:24px 0;text-align:center;
  font-size:13px;color:rgba(229,220,200,.4);
}
.footer-bottom .brand-inline{color:var(--gold);font-weight:600}
/* ===== Reveal Animation ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
/* ===== Responsive ===== */
@media screen and (max-width:1024px){
  :root{--space-section:70px}
  .hero-inner{gap:40px}
  .hero h1{font-size:34px}
  .stats-inner{grid-template-columns:repeat(2,1fr);gap:12px}
  .stat-item{border-right:none;border-bottom:1px solid rgba(201,165,90,.12);padding-bottom:28px}
  .stats-inner{row-gap:36px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .process-wrap{grid-template-columns:repeat(2,1fr);gap:40px 20px}
  .process-step::after{display:none}
}
@media screen and (max-width:768px){
  :root{--space-section:50px}
  .section-head{margin-bottom:36px}
  .section-head h2{font-size:26px}
  .search-box{width:38px;padding:0;background:transparent;border:none}
  .search-box input{display:none}
  .search-box button{width:38px;height:38px}
  .search-box:focus-within{background:transparent}
  .topbar{height:60px}
  .topbar-right{gap:10px}
  .brand-text{font-size:18px}
  .btn-lg{padding:14px 28px;font-size:15px}
  .hero{min-height:0}
  .hero-inner{flex-direction:column;padding:60px 24px;gap:50px;text-align:center}
  .hero h1{font-size:30px}
  .hero-sub{font-size:15px;margin:0 auto 30px}
  .hero-points{justify-content:center}
  .hero-visual{order:2}
  .phone-frame{width:220px}
  .features-grid{grid-template-columns:1fr;gap:18px}
  .feature-card{padding:26px 22px}
  .feature-icon{width:46px;height:46px;font-size:17px}
  .scenario-grid{grid-template-columns:1fr}
  .scenario-main,.scenario-main img{min-height:300px}
  .scenario-side{grid-template-columns:1fr 1fr;gap:16px}
  .scenario-mini{flex-direction:column;padding:18px;text-align:center}
  .scenario-mini img{width:100%;height:130px}
  .news-grid{grid-template-columns:1fr;gap:18px}
  .process-wrap{grid-template-columns:1fr 1fr;gap:16px}
  .process-step{padding:20px 14px}
  .stat-number{font-size:34px}
  .contact-wrap{grid-template-columns:1fr;gap:40px;padding:50px 24px}
  .contact-form-wrap{padding:28px 22px}
  .footer-top{grid-template-columns:1fr;gap:36px;padding:50px 24px 40px}
  .faq-q{padding:18px 20px;font-size:15px}
  .faq-a-inner{padding:0 20px 20px}
}
@media screen and (max-width:520px){
  .container{padding:0 18px}
  .hero-inner{padding:48px 18px}
  .hero h1{font-size:26px}
  .hero-cta{flex-direction:column;gap:12px}
  .hero-cta .btn{width:100%}
  .scenario-side{grid-template-columns:1fr}
  .process-wrap{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .stat-number{font-size:30px}
  .news-body{padding:22px 20px}
  .footer-top{grid-template-columns:1fr}
  .btn{padding:12px 24px}
}

/* roulang page: category1 */
:root{
  --gold:#C9A55A;
  --gold-hover:#A9853F;
  --dark:#0D0D0D;
  --dark-2:#1A1A1A;
  --dark-3:#242424;
  --light:#F7F4EF;
  --brown:#5C3A2E;
  --wine:#8B2635;
  --text-main:#2A2A2A;
  --text-sub:#6B6B6B;
  --cream:#E5DCC8;
  --border-gold:rgba(201,165,90,.4);
  --border-light:rgba(201,165,90,.16);
  --radius:8px;
  --radius-btn:6px;
  --radius-input:4px;
  --shadow-card:0 4px 20px rgba(0,0,0,.06);
  --shadow-gold:0 8px 30px rgba(201,165,90,.22);
  --space-section:96px;
  --space-section-mobile:48px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","STSong","SimSun",Georgia,"Times New Roman",serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);color:var(--text-main);background:var(--light);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:var(--gold);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--gold-hover)}
p{margin:0 0 16px}
h1,h2,h3,h4,h5,h6{margin:0 0 16px;font-family:var(--font-serif);line-height:1.35}
ul,ol{padding-left:22px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:16px;font-weight:600;line-height:1;padding:14px 28px;border-radius:var(--radius-btn);border:1px solid transparent;cursor:pointer;transition:all .2s ease;text-align:center;min-height:44px}
.btn-primary{background:var(--gold);color:var(--dark);border-color:var(--gold)}
.btn-primary:hover{background:var(--gold-hover);border-color:var(--gold-hover);color:var(--dark);transform:translateY(-2px);box-shadow:var(--shadow-gold)}
.btn-outline{background:transparent;color:var(--gold);border-color:var(--border-gold)}
.btn-outline:hover{background:var(--gold);color:var(--dark);border-color:var(--gold);transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:14px;min-height:38px}
.btn-lg{padding:16px 36px;font-size:17px}
/* Section titles */
.section-title{font-size:32px;font-weight:700;color:var(--dark);text-align:center;margin-bottom:12px}
.section-subtitle{font-size:15px;color:var(--text-sub);text-align:center;max-width:640px;margin:0 auto 48px}
/* Header */
.site-header{position:sticky;top:0;z-index:100}
.topbar{background:var(--dark);border-bottom:1px solid rgba(255,255,255,.04)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-serif)}
.brand-mark{width:32px;height:32px;border:2px solid var(--gold);border-radius:8px 2px 8px 2px;position:relative;flex:0 0 auto}
.brand-mark::before{content:"";position:absolute;inset:6px;border:1px solid var(--gold);border-radius:3px;opacity:.6}
.brand-text{font-size:22px;font-weight:700;color:#fff;letter-spacing:1px}
.topbar-right{display:flex;align-items:center;gap:16px}
.search-box{display:flex;align-items:center;background:rgba(255,255,255,.06);border:1px solid var(--border-gold);border-radius:999px;padding:2px 4px 2px 16px;transition:border-color .2s}
.search-box:focus-within{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,165,90,.15)}
.search-box input{background:transparent;border:none;outline:none;color:var(--cream);font-size:14px;width:190px;padding:8px 0}
.search-box input::placeholder{color:#8a8a8a}
.search-box button{background:var(--gold);border:none;color:var(--dark);width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:14px;transition:background .2s;display:flex;align-items:center;justify-content:center}
.search-box button:hover{background:var(--gold-hover)}
.main-nav{background:var(--dark-2);border-bottom:1px solid rgba(255,255,255,.05)}
.nav-tabs{list-style:none;margin:0;padding:0;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tabs li{flex:0 0 auto}
.nav-tabs a{display:inline-block;padding:12px 20px;font-size:14px;color:rgba(255,255,255,.7);border-bottom:2px solid transparent;transition:color .2s,border-color .2s;white-space:nowrap}
.nav-tabs a:hover{color:var(--gold)}
.nav-tabs a.active{color:#fff;border-bottom:2px solid var(--gold)}
/* Hero */
.hero{position:relative;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;padding:88px 0;color:var(--cream);overflow:hidden}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(13,13,13,.92) 0%,rgba(13,13,13,.76) 55%,rgba(13,13,13,.45) 100%)}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;gap:56px}
.hero-text{flex:1.1;padding-right:20px}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:20px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:rgba(255,255,255,.6)}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb .sep{opacity:.5}
.hero-title{font-size:44px;line-height:1.3;font-weight:700;color:#fff;margin-bottom:20px;letter-spacing:.5px}
.hero-title .gold{color:var(--gold);text-shadow:0 2px 16px rgba(201,165,90,.35)}
.hero-desc{font-size:17px;line-height:1.9;color:rgba(229,220,200,.85);max-width:540px;margin-bottom:32px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{flex:0 0 420px;position:relative}
.device-frame{background:linear-gradient(145deg,#1e1e1e,#141414);border:1px solid var(--border-gold);border-radius:24px;padding:14px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.device-screen{border-radius:18px;overflow:hidden;background:#000;position:relative}
.device-screen img{width:100%;height:380px;object-fit:cover;opacity:.9}
.device-screen::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,rgba(201,165,90,.08),rgba(13,13,13,.35));pointer-events:none}
.device-label{position:absolute;left:24px;right:24px;bottom:18px;z-index:2;background:rgba(13,13,13,.55);backdrop-filter:blur(6px);border:1px solid rgba(201,165,90,.25);border-radius:10px;padding:10px 16px;font-size:13px;color:var(--cream);text-align:center}
/* Section general */
.section{padding:var(--space-section) 0}
.section-soft{background:var(--light)}
.section-deep{background:var(--dark);color:#d8d0c4}
.section-deep .section-title{color:#fff}
.section-deep .section-subtitle{color:rgba(229,220,200,.75)}
/* Feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:8px}
.feature-card{background:#fff;border:1px solid #ece5da;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-card);transition:transform .25s,box-shadow .25s,border-color .25s}
.feature-card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(0,0,0,.09);border-color:var(--border-gold)}
.feature-icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(135deg,rgba(201,165,90,.16),rgba(201,165,90,.06));border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--gold);margin-bottom:16px}
.feature-card h3{font-size:17px;font-weight:700;color:var(--text-main);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-sub);line-height:1.75;margin:0}
/* Scenario section */
.scenario-wrap{display:flex;align-items:center;gap:56px}
.scenario-media{flex:1;position:relative}
.scenario-media img{border-radius:var(--radius);box-shadow:0 16px 40px rgba(0,0,0,.16)}
.scenario-media::before{content:"";position:absolute;top:-18px;left:-18px;width:120px;height:120px;border-top:2px solid var(--gold);border-left:2px solid var(--gold);border-radius:10px 0 0 0;opacity:.5}
.scenario-content{flex:1}
.scenario-list{list-style:none;padding:0;margin:0}
.scenario-list li{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid #ece5da}
.scenario-list li:last-child{border-bottom:none}
.scenario-list .num{font-family:var(--font-serif);font-size:26px;font-weight:700;color:var(--gold);line-height:1;min-width:44px}
.scenario-list h3{font-size:17px;font-weight:600;margin-bottom:6px}
.scenario-list p{font-size:14px;color:var(--text-sub);margin:0}
/* Process steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step-item{position:relative;background:var(--dark-3);border:1px solid var(--border-light);border-radius:var(--radius);padding:32px 22px 26px;text-align:center;transition:border-color .25s,transform .25s}
.step-item:hover{border-color:var(--border-gold);transform:translateY(-3px)}
.step-item::before{counter-increment:step;content:counter(step,decimal-leading-zero);display:block;font-family:var(--font-serif);font-size:36px;font-weight:700;color:var(--gold);margin-bottom:10px;opacity:.85}
.step-item::after{content:"";position:absolute;top:50%;right:-16px;width:16px;height:1px;background:var(--border-gold)}
.step-item:last-child::after{display:none}
.step-item h3{font-size:16px;color:var(--cream);margin-bottom:8px}
.step-item p{font-size:13px;color:rgba(229,220,200,.7);margin:0;line-height:1.6}
/* FAQ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--light);border-left:4px solid var(--gold);border-radius:6px;margin-bottom:14px;box-shadow:var(--shadow-card);overflow:hidden}
.faq-item details>summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-main);transition:background .2s}
.faq-item details>summary::-webkit-details-marker{display:none}
.faq-item details>summary:hover{background:#f1ece2}
.faq-item .toggle-icon{width:30px;height:30px;border-radius:50%;border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--gold);flex:0 0 auto;transition:transform .3s,background .3s}
.faq-item details[open] .toggle-icon{transform:rotate(45deg);background:var(--gold);color:var(--dark)}
.faq-answer{padding:0 24px 20px;font-size:15px;color:var(--text-sub);line-height:1.85;border-top:1px solid #ece5da;margin-top:0}
.faq-answer p{margin-bottom:0}
/* CTA contact */
.contact-grid{display:flex;gap:40px;background:#fff;border-radius:12px;box-shadow:var(--shadow-card);padding:48px;border-top:3px solid var(--gold)}
.contact-info{flex:1}
.contact-info h3{font-size:24px;margin-bottom:12px}
.contact-info p{color:var(--text-sub);font-size:15px}
.contact-list{list-style:none;padding:0;margin:24px 0 0}
.contact-list li{display:flex;align-items:flex-start;gap:14px;padding:12px 0;border-bottom:1px solid #f0ebe2;font-size:15px}
.contact-list li:last-child{border-bottom:none}
.contact-list .c-icon{width:36px;height:36px;border-radius:8px;background:rgba(201,165,90,.12);border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;color:var(--gold);font-size:15px;flex:0 0 auto}
.contact-list strong{display:block;font-size:13px;color:var(--text-sub);font-weight:500}
.contact-list span{font-size:15px;color:var(--text-main)}
.contact-form-wrap{flex:1.15}
.contact-form{display:grid;gap:18px}
.form-group label{font-size:14px;font-weight:600;color:var(--text-main);display:block;margin-bottom:6px}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;border:1px solid #d8d0c4;border-radius:var(--radius-input);font-size:15px;font-family:var(--font-sans);background:#fff;transition:border-color .2s,box-shadow .2s;outline:none}
.form-group input:focus,.form-group textarea:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,165,90,.18)}
.form-group textarea{resize:vertical;min-height:100px}
.contact-form .btn{width:100%;margin-top:4px}
/* Footer */
.site-footer{background:var(--dark);color:#9a9a9a;padding:64px 0 24px}
.footer-top{display:flex;gap:48px;flex-wrap:wrap;margin-bottom:40px}
.footer-brand{flex:1.3;min-width:280px}
.footer-brand .brand-text{font-size:24px}
.footer-brand p{margin-top:16px;font-size:14px;color:#9a9a9a;line-height:1.8}
.footer-col{flex:1;min-width:140px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--cream);margin-bottom:16px}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#9a9a9a;transition:color .2s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:24px;text-align:center;font-size:13px;color:#7a7a7a}
.footer-bottom .brand-inline{color:var(--gold);font-family:var(--font-serif);font-weight:600}
/* Custom panels */
.notice-bar{background:rgba(201,165,90,.1);border:1px solid var(--border-gold);border-radius:var(--radius);padding:18px 24px;display:flex;align-items:center;gap:16px;margin:32px 0 0}
.notice-bar i{color:var(--gold);font-size:22px;flex:0 0 auto}
.notice-bar p{margin:0;font-size:14px;color:var(--text-sub)}
/* Motion */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.animate-up{animation:fadeUp .6s ease both}
.animate-up.delay-1{animation-delay:.1s}
.animate-up.delay-2{animation-delay:.2s}
.animate-up.delay-3{animation-delay:.3s}
/* Responsive */
@media(max-width:1024px){
  .hero-title{font-size:36px}
  .hero-visual{flex-basis:340px}
  .device-screen img{height:320px}
  .steps{grid-template-columns:repeat(2,1fr);gap:20px}
  .step-item::after{display:none}
}
@media(max-width:768px){
  .section{padding:var(--space-section-mobile) 0}
  .section-title{font-size:28px}
  .hero{padding:56px 0}
  .hero-inner{flex-direction:column;gap:36px}
  .hero-text{padding-right:0}
  .hero-title{font-size:30px}
  .hero-desc{font-size:16px}
  .hero-visual{flex-basis:auto;width:100%;max-width:400px;margin:0 auto}
  .device-screen img{height:300px}
  .feature-grid{grid-template-columns:1fr;gap:16px}
  .scenario-wrap{flex-direction:column;gap:40px}
  .scenario-media::before{display:none}
  .steps{grid-template-columns:1fr 1fr}
  .contact-grid{flex-direction:column;padding:28px}
  .topbar-inner{height:auto;padding:12px 16px;flex-wrap:wrap}
  .topbar-right .search-box{display:none}
  .footer-top{gap:32px}
}
@media(max-width:520px){
  .steps{grid-template-columns:1fr}
  .hero-cta{flex-direction:column;width:100%}
  .hero-cta .btn{width:100%}
  .section-title{font-size:24px}
  .hero-title{font-size:26px}
  .footer-brand{min-width:100%}
  .container{padding:0 16px}
  .faq-item details>summary{padding:16px 18px;font-size:15px}
  .faq-answer{padding:0 18px 16px;font-size:14px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
        --gold:#C9A55A;
        --gold-dark:#A9853F;
        --gold-light:#E3C87B;
        --ink:#0D0D0D;
        --ink-2:#1A1A1A;
        --paper:#F7F4EF;
        --brown:#5C3A2E;
        --wine:#8B2635;
        --cream:#E5DCC8;
        --text-dark:#2A2A2A;
        --text-muted:#6B6B6B;
        --line:rgba(201,165,90,.4);
        --radius:8px;
        --radius-sm:6px;
        --radius-xs:4px;
        --shadow:0 4px 20px rgba(0,0,0,.06);
        --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
        --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    }
    *,
    *::before,
    *::after{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:var(--font-sans);font-size:16px;line-height:1.8;color:var(--text-dark);background:var(--paper);-webkit-font-smoothing:antialiased}
    img{max-width:100%;height:auto;display:block}
    a{color:inherit;text-decoration:none;transition:all .2s ease}
    a:hover,a:focus{outline:none}
    ul,ol{list-style:none}
    button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit;border:none;background:none}
    .container{max-width:1200px;margin:0 auto;padding:0 24px}
    .grid-container{max-width:1200px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;line-height:1.4;cursor:pointer;transition:all .2s ease;border:1px solid transparent;min-height:44px}
    .btn-primary{background:var(--gold);color:#1A1A1A;border-color:var(--gold)}
    .btn-primary:hover{background:var(--gold-dark);border-color:var(--gold-dark);transform:translateY(-2px);box-shadow:0 8px 20px rgba(201,165,90,.25)}
    .btn-primary:active{transform:translateY(0);box-shadow:none}
    .btn-primary:focus-visible{outline:2px solid var(--gold-light);outline-offset:2px}
    .btn-outline{background:transparent;color:var(--gold);border-color:var(--line)}
    .btn-outline:hover{background:var(--gold);color:#1A1A1A;border-color:var(--gold);transform:translateY(-2px)}
    .btn-outline:focus-visible{outline:2px solid var(--gold-light);outline-offset:2px}
    .btn-sm{padding:8px 20px;min-height:38px;font-size:14px}
    .btn:disabled{opacity:.3;cursor:not-allowed;transform:none}
    .badge{display:inline-flex;align-items:center;padding:4px 14px;border-radius:999px;font-size:12px;line-height:1.5;color:var(--gold);border:1px solid var(--line);background:rgba(201,165,90,.08)}
    .site-header{position:sticky;top:0;z-index:1000;background:var(--ink);border-bottom:1px solid rgba(255,255,255,.06)}
    .topbar{background:var(--ink)}
    .topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
    .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
    .brand-mark{width:10px;height:34px;background:linear-gradient(180deg,var(--gold-light),var(--gold) 60%,var(--gold-dark));border-radius:3px;position:relative}
    .brand-mark::after{content:"";position:absolute;top:3px;left:3px;right:3px;bottom:50%;background:#0D0D0D;border-radius:2px;opacity:.3}
    .brand-text{font-family:var(--font-serif);font-weight:700;font-size:22px;color:#fff;letter-spacing:2px}
    .brand:hover .brand-text{color:var(--gold-light)}
    .topbar-right{display:flex;align-items:center;gap:16px;flex:1;justify-content:flex-end}
    .search-box{display:flex;align-items:center;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:999px;padding:2px 4px 2px 18px;width:300px;transition:border-color .2s}
    .search-box:focus-within{border-color:var(--gold)}
    .search-box input{flex:1;background:transparent;border:none;color:var(--cream);font-size:14px;padding:8px 8px 8px 0}
    .search-box input::placeholder{color:rgba(229,220,200,.45)}
    .search-box input:focus{outline:none;box-shadow:none}
    .search-box button{width:36px;height:36px;border-radius:50%;background:var(--gold);color:#1A1A1A;cursor:pointer;transition:background .2s;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center}
    .search-box button:hover{background:var(--gold-light)}
    .main-nav{background:var(--ink-2);border-top:1px solid rgba(255,255,255,.04);position:relative;z-index:999}
    .nav-tabs{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;padding:0 8px;margin:0}
    .nav-tabs::-webkit-scrollbar{display:none}
    .nav-tabs li{flex-shrink:0}
    .nav-tabs a{display:block;padding:11px 20px;font-size:14px;font-weight:500;color:rgba(229,220,200,.7);border-bottom:2px solid transparent;transition:color .2s,border-color .2s;white-space:nowrap}
    .nav-tabs a:hover{color:var(--gold)}
    .nav-tabs a.active{color:#fff;border-bottom-color:var(--gold)}
    .nav-tabs a:focus-visible{outline:2px solid var(--gold);outline-offset:-2px;border-radius:2px}
    .article-banner{position:relative;background:url('/assets/images/backpic/back-4.webp') center/cover no-repeat;padding:70px 0 50px;color:var(--cream)}
    .article-banner::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,13,.82),rgba(13,13,13,.72) 40%,rgba(13,13,13,.9));z-index:1}
    .article-banner .container{position:relative;z-index:2}
    .breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(229,220,200,.7);margin-bottom:18px}
    .breadcrumb a{color:rgba(229,220,200,.7)}
    .breadcrumb a:hover{color:var(--gold)}
    .breadcrumb .sep{color:rgba(201,165,90,.5)}
    .breadcrumb .current{color:var(--gold);font-weight:500;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .article-banner h1{font-family:var(--font-serif);font-size:34px;line-height:1.3;font-weight:700;color:#fff;margin-bottom:14px;max-width:860px;letter-spacing:.5px}
    .article-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .article-meta time{font-size:13px;color:rgba(229,220,200,.65)}
    .article-main{padding:0 0 70px}
    .article-body-wrap{max-width:860px;margin:0 auto;padding:0 24px}
    .article-inner{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:48px 56px;margin-top:-24px;position:relative;z-index:3}
    .article-content{font-size:16px;line-height:1.85;color:var(--text-dark)}
    .article-content p{margin-bottom:1.35em}
    .article-content h2,.article-content h3,.article-content h4{font-family:var(--font-serif);color:#1A1A1A;margin:1.8em 0 .8em;font-weight:700;line-height:1.4}
    .article-content h2{font-size:24px;border-left:4px solid var(--gold);padding-left:14px}
    .article-content h3{font-size:20px}
    .article-content h4{font-size:17px}
    .article-content a{color:var(--gold-dark);text-decoration:underline;text-underline-offset:4px}
    .article-content a:hover{color:var(--gold)}
    .article-content strong{color:#1A1A1A;font-weight:700}
    .article-content ul{list-style:disc;padding-left:1.6em;margin:0 0 1.35em}
    .article-content ol{list-style:decimal;padding-left:1.6em;margin:0 0 1.35em}
    .article-content li{margin-bottom:.45em}
    .article-content blockquote{border-left:4px solid var(--gold);background:var(--paper);padding:16px 24px;margin:1.5em 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:#444;font-style:normal}
    .article-content blockquote p:last-child{margin-bottom:0}
    .article-content img{border-radius:var(--radius);margin:1.5em 0;box-shadow:0 4px 16px rgba(0,0,0,.08)}
    .article-content pre{background:var(--ink);color:var(--cream);padding:20px 24px;border-radius:var(--radius);overflow-x:auto;margin:1.5em 0;font-size:14px;line-height:1.6;border:1px solid rgba(255,255,255,.08)}
    .article-content code{background:rgba(201,165,90,.1);color:var(--gold-dark);padding:2px 8px;border-radius:4px;font-size:.9em}
    .article-content pre code{background:transparent;color:var(--cream);padding:0;border-radius:0}
    .article-content hr{border:none;border-top:1px solid #E8E1D5;margin:2em 0}
    .empty-state{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:70px 40px;text-align:center;margin-top:-24px}
    .empty-state p{font-size:18px;color:var(--text-muted);margin-bottom:24px}
    .related-section{background:var(--paper);padding:60px 0}
    .related-section .section-title{font-family:var(--font-serif);font-size:24px;font-weight:700;color:#1A1A1A;text-align:center;margin-bottom:36px;position:relative;padding-bottom:14px}
    .related-section .section-title::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:56px;height:3px;background:linear-gradient(90deg,var(--gold-dark),var(--gold),var(--gold-dark));border-radius:2px}
    .related-grid{margin-top:8px}
    .related-card{display:flex;flex-direction:column;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid #EFE9E0;transition:transform .2s,box-shadow .2s,border-color .2s;height:100%}
    .related-card:hover{transform:translateY(-4px);border-color:var(--line);box-shadow:0 12px 28px rgba(0,0,0,.08)}
    .related-card img{height:180px;object-fit:cover;width:100%}
    .related-card .card-body{padding:20px 24px 24px;display:flex;flex-direction:column;flex:1}
    .related-card h3{font-size:17px;font-weight:700;color:#1A1A1A;margin-bottom:8px;font-family:var(--font-serif)}
    .related-card p{font-size:14px;color:var(--text-muted);line-height:1.6;margin-bottom:14px;flex:1}
    .related-card .card-more{font-size:13px;color:var(--gold-dark);font-weight:600;display:inline-flex;align-items:center;gap:6px}
    .related-card:hover .card-more{color:var(--gold)}
    .related-card:hover .card-more i{transform:translateX(3px)}
    .card-more i{transition:transform .2s}
    .site-footer{background:var(--ink);color:#9A9A9A;padding:60px 0 0;margin-top:0}
    .footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.06)}
    .footer-brand .brand-text{font-size:20px}
    .footer-brand p{font-size:14px;line-height:1.7;color:#9A9A9A;margin-top:14px;max-width:340px}
    .footer-col h4{font-size:15px;color:#fff;font-weight:600;margin-bottom:18px;letter-spacing:1px}
    .footer-col ul li{margin-bottom:10px}
    .footer-col ul li a{color:#9A9A9A;font-size:14px;transition:color .2s}
    .footer-col ul li a:hover{color:var(--gold)}
    .footer-bottom{padding:20px 0;text-align:center;font-size:13px;color:#7A7A7A}
    .footer-bottom .brand-inline{color:var(--gold);font-weight:600}
    @media(max-width:900px){
        .footer-top{grid-template-columns:1fr 1fr;gap:30px}
        .article-inner{padding:36px 30px}
        .brand-text{font-size:19px}
        .search-box{width:240px}
    }
    @media(max-width:768px){
        .container{padding:0 18px}
        .topbar-inner{height:56px}
        .search-box{width:130px;padding-left:12px}
        .search-box input{font-size:13px}
        .search-box button{width:32px;height:32px}
        .topbar-right{gap:10px}
        .nav-tabs a{padding:10px 14px;font-size:13px}
        .article-banner{padding:44px 0 34px}
        .article-banner h1{font-size:24px;line-height:1.4}
        .article-banner .breadcrumb{font-size:12px;margin-bottom:12px}
        .article-body-wrap{padding:0 16px}
        .article-inner{padding:28px 20px;margin-top:-18px;border-radius:8px}
        .article-content{font-size:15px;line-height:1.8}
        .article-content h2{font-size:20px}
        .article-content h3{font-size:18px}
        .article-main{padding-bottom:48px}
        .related-section{padding:44px 0}
        .related-card img{height:150px}
        .footer-top{grid-template-columns:1fr 1fr;gap:24px 20px}
        .footer-bottom{font-size:12px;padding:16px 10px;line-height:1.6}
    }
    @media(max-width:520px){
        .topbar-inner{gap:8px}
        .brand-mark{width:8px;height:28px}
        .brand-text{font-size:17px;letter-spacing:1px}
        .search-box{width:100px}
        .search-box button{display:none}
        .btn-sm{padding:7px 14px;font-size:13px}
        .footer-top{grid-template-columns:1fr;gap:24px}
        .footer-brand p{max-width:100%}
        .related-section .section-title{font-size:20px}
        .article-inner{padding:24px 18px}
        .empty-state{padding:48px 20px}
    }
    @media(min-width:769px){
        .nav-tabs::-webkit-scrollbar{height:0}
    }

/* roulang page: category3 */
:root {
  --gold: #C9A55A;
  --gold-dark: #A9853F;
  --ink: #0D0D0D;
  --ink-2: #1A1A1A;
  --warm: #F7F4EF;
  --brown: #5C3A2E;
  --wine: #8B2635;
  --text-dark: #2A2A2A;
  --text-sub: #6B6B6B;
  --text-light: #E5DCC8;
  --text-light-weak: rgba(229,220,200,0.7);
  --border-gold: rgba(201,165,90,0.4);
  --card-radius: 8px;
  --btn-radius: 6px;
  --input-radius: 4px;
  --card-shadow: 0 4px 20px rgba(0,0,0,0.06);
  --space-section: 88px;
  --space-section-mobile: 46px;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dark);
  background: var(--warm);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: 14px; }
input:focus, textarea:focus, button:focus { outline: none; }
.site-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========= Header ========= */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--ink); box-shadow: 0 2px 12px rgba(0,0,0,0.45); }
.topbar { background: var(--ink); min-height: 64px; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark { width: 30px; height: 30px; border-radius: 50% 50% 50% 0; background: linear-gradient(135deg, var(--gold), #e2c684); position: relative; flex-shrink: 0; }
.brand-mark::after { content: ""; position: absolute; inset: 5px; border: 1px solid rgba(13,13,13,0.55); border-radius: inherit; }
.brand-text { font-family: var(--font-serif); font-size: 22px; font-weight: 700; color: #fff; letter-spacing: 2px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.search-box { display: flex; align-items: center; background: rgba(255,255,255,0.07); border: 1px solid var(--border-gold); border-radius: 999px; padding: 0 4px 0 18px; height: 38px; transition: border-color .2s ease, background .2s ease; }
.search-box:focus-within { border-color: var(--gold); background: rgba(255,255,255,0.1); }
.search-box input { background: transparent; border: 0; color: var(--text-light); width: 210px; font-size: 14px; }
.search-box input::placeholder { color: rgba(229,220,200,0.5); }
.search-box button { border: 0; background: var(--gold); color: #1a1a1a; width: 32px; height: 32px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background .2s ease, transform .2s ease; }
.search-box button:hover { background: var(--gold-dark); transform: scale(1.05); }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: var(--btn-radius); font-weight: 600; cursor: pointer; border: 1px solid transparent; transition: all .2s ease; }
.btn-primary { background: var(--gold); color: #141414; padding: 0 24px; height: 44px; font-size: 15px; }
.btn-primary:hover { background: var(--gold-dark); transform: translateY(-2px); box-shadow: 0 8px 18px rgba(201,165,90,0.25); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--gold); border-color: var(--gold); padding: 0 26px; height: 46px; font-size: 15px; }
.btn-outline:hover { background: var(--gold); color: #141414; transform: translateY(-2px); }
.btn-sm { height: 36px; padding: 0 18px; font-size: 14px; border-radius: 999px; }

/* Second row nav */
.main-nav { background: var(--ink-2); border-top: 1px solid rgba(255,255,255,0.05); min-height: 44px; }
.nav-tabs { display: flex; align-items: center; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; gap: 2px; }
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs li { flex: 0 0 auto; }
.nav-tabs a { display: block; padding: 12px 20px; color: rgba(229,220,200,0.7); font-size: 14px; font-weight: 500; white-space: nowrap; border-bottom: 2px solid transparent; }
.nav-tabs a:hover { color: var(--gold); }
.nav-tabs a.active { color: #fff; border-bottom-color: var(--gold); }

/* ========= Page Hero ========= */
.page-hero {
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  position: relative;
  padding: 72px 0 76px;
  color: var(--text-light);
  text-align: center;
}
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,13,13,0.82), rgba(13,13,13,0.58)); z-index: 1; }
.page-hero .site-container { position: relative; z-index: 2; }
.breadcrumb { font-size: 13px; color: rgba(229,220,200,0.6); margin-bottom: 20px; letter-spacing: 0.5px; }
.breadcrumb a { color: rgba(229,220,200,0.6); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep { margin: 0 8px; color: rgba(229,220,200,0.35); }
.page-hero h1 { font-family: var(--font-serif); font-size: 40px; font-weight: 700; color: #fff; letter-spacing: 2px; line-height: 1.35; margin-bottom: 18px; }
.page-hero h1 .gold { color: var(--gold); border-bottom: 2px solid rgba(201,165,90,0.6); }
.page-hero .hero-desc { max-width: 720px; margin: 0 auto 30px; font-size: 16px; color: rgba(229,220,200,0.75); line-height: 1.85; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn { min-width: 150px; }

/* ========= Sections ========= */
.section { padding: var(--space-section) 0; }
.section-alt { background: #fff; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head .tagline { display: inline-flex; align-items: center; gap: 10px; color: var(--gold-dark); font-size: 13px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; margin-bottom: 10px; }
.section-head .tagline::before, .section-head .tagline::after { content: ""; width: 28px; height: 1px; background: var(--gold); opacity: 0.6; }
.section-head h2 { font-family: var(--font-serif); font-size: 32px; font-weight: 700; color: var(--text-dark); line-height: 1.4; margin-bottom: 14px; }
.section-head p { font-size: 15px; color: var(--text-sub); line-height: 1.8; }

/* Service cards */
.service-cards-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card {
  background: #fff;
  border-radius: var(--card-radius);
  padding: 34px 28px 28px;
  border: 1px solid rgba(201,165,90,0.2);
  box-shadow: var(--card-shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--gold), transparent); }
.service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); border-color: rgba(201,165,90,0.5); }
.service-card .icon-wrap { width: 52px; height: 52px; border-radius: 12px; background: rgba(201,165,90,0.12); border: 1px solid rgba(201,165,90,0.3); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.service-card .icon-wrap i { font-size: 24px; color: var(--gold); }
.service-card h3 { font-family: var(--font-serif); font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-sub); line-height: 1.8; }
.service-card .more-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--gold-dark); }
.service-card .more-link i { transition: transform .2s ease; font-size: 12px; }
.service-card .more-link:hover i { transform: translateX(4px); }

/* Process timeline */
.process-section { background: var(--ink); position: relative; }
.process-section .section-head h2 { color: #fff; }
.process-section .section-head p { color: rgba(229,220,200,0.65); }
.process-section .section-head .tagline { color: var(--gold); }
.process-section .section-head .tagline::before, .process-section .section-head .tagline::after { background: var(--gold); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.process-step { text-align: center; padding: 32px 18px; border: 1px solid rgba(201,165,90,0.2); background: rgba(255,255,255,0.03); border-radius: var(--card-radius); transition: background .25s ease, border-color .25s ease; }
.process-step:hover { background: rgba(201,165,90,0.08); border-color: rgba(201,165,90,0.45); }
.process-num { width: 46px; height: 46px; margin: 0 auto 16px; border-radius: 50%; border: 2px solid var(--gold); color: var(--gold); font-family: var(--font-serif); font-size: 20px; font-weight: 700; display: flex; align-items: center; justify-content: center; background: rgba(201,165,90,0.1); }
.process-step h3 { color: #fff; font-size: 17px; font-weight: 600; margin-bottom: 10px; font-family: var(--font-serif); }
.process-step p { font-size: 13px; color: rgba(229,220,200,0.6); line-height: 1.7; }

/* Benefit split */
.benefit-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.benefit-media { position: relative; border-radius: var(--card-radius); overflow: hidden; box-shadow: 0 18px 40px rgba(0,0,0,0.15); }
.benefit-media img { width: 100%; height: 420px; object-fit: cover; }
.benefit-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(13,13,13,0.5)); }
.benefit-content .feature-label { display: inline-block; background: rgba(201,165,90,0.15); color: var(--gold-dark); font-size: 12px; font-weight: 600; letter-spacing: 1px; padding: 4px 14px; border-radius: 999px; margin-bottom: 16px; }
.benefit-content h2 { font-family: var(--font-serif); font-size: 30px; font-weight: 700; color: var(--text-dark); line-height: 1.4; margin-bottom: 20px; }
.benefit-content > p { color: var(--text-sub); font-size: 15px; line-height: 1.8; margin-bottom: 26px; }
.benefit-list li { display: flex; gap: 14px; align-items: flex-start; padding: 13px 0; border-bottom: 1px solid rgba(13,13,13,0.06); }
.benefit-list li:last-child { border-bottom: 0; }
.benefit-list i { color: var(--gold); font-size: 16px; margin-top: 5px; flex-shrink: 0; }
.benefit-list strong { display: block; font-size: 16px; font-weight: 600; color: var(--text-dark); margin-bottom: 2px; }
.benefit-list span { font-size: 14px; color: var(--text-sub); line-height: 1.65; }

/* Data band */
.data-band { background: linear-gradient(135deg, #0d0d0d 0%, #1a1a1a 100%); padding: 60px 0; border-top: 1px solid rgba(201,165,90,0.25); border-bottom: 1px solid rgba(201,165,90,0.25); }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.data-item { padding: 20px 10px; }
.data-item .num { font-family: var(--font-serif); font-size: 42px; font-weight: 700; color: var(--gold); line-height: 1.2; letter-spacing: 1px; }
.data-item .label { font-size: 14px; color: rgba(229,220,200,0.6); margin-top: 8px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border-left: 4px solid var(--gold); border-radius: 0 var(--card-radius) var(--card-radius) 0; box-shadow: var(--card-shadow); margin-bottom: 16px; overflow: hidden; transition: box-shadow .25s ease; }
.faq-item.open { box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; background: var(--warm); border: 0; cursor: pointer; text-align: left; font-size: 16px; font-weight: 600; color: var(--text-dark); font-family: var(--font-serif); transition: background .2s ease; }
.faq-q:hover { background: #f0ebdf; }
.faq-q .faq-icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--gold); color: #141414; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; transition: transform .3s ease; }
.faq-item.open .faq-icon { transform: rotate(135deg); }
.faq-a { max-height: 0; padding: 0 24px; overflow: hidden; transition: max-height .35s ease, padding .35s ease; background: #fff; }
.faq-item.open .faq-a { max-height: 280px; padding: 0 24px 22px; }
.faq-a p { font-size: 15px; color: var(--text-sub); line-height: 1.8; padding-top: 16px; }

/* CTA */
.cta-section { padding: 70px 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; position: relative; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(13,13,13,0.78); }
.cta-section .site-container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { font-family: var(--font-serif); font-size: 34px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.cta-section p { color: rgba(229,220,200,0.7); font-size: 15px; max-width: 600px; margin: 0 auto 30px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* Category note */
.category-note { padding: 48px 0; background: var(--warm); border-top: 1px solid rgba(201,165,90,0.2); }
.category-note-inner { max-width: 760px; margin: 0 auto; background: #fff; border: 1px solid rgba(201,165,90,0.25); border-radius: var(--card-radius); padding: 32px 36px; box-shadow: var(--card-shadow); }
.category-note-inner h3 { font-size: 18px; font-family: var(--font-serif); font-weight: 700; color: var(--text-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.category-note-inner h3 i { color: var(--gold); }
.category-note-inner p { font-size: 14px; color: var(--text-sub); line-height: 1.8; }
.category-note-inner p + p { margin-top: 12px; }

/* ========= Footer ========= */
.site-footer { background: var(--ink); color: #9a9a9a; font-size: 14px; padding-top: 56px; }
.footer-top { max-width: 1200px; margin: 0 auto; padding: 0 24px 40px; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .brand-text { font-size: 20px; }
.footer-brand p { margin-top: 14px; line-height: 1.85; font-size: 13px; color: rgba(229,220,200,0.55); max-width: 360px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-light); margin-bottom: 16px; position: relative; padding-bottom: 8px; }
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 24px; height: 2px; background: var(--gold); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(229,220,200,0.55); font-size: 14px; }
.footer-col ul a:hover { color: var(--gold); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(229,220,200,0.4); }
.footer-bottom .brand-inline { color: var(--gold); font-weight: 600; }

/* ========= Responsive ========= */
@media (max-width: 1024px) {
  .service-cards-wrap { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: var(--space-section-mobile) 0; }
  .topbar-inner { padding: 0 16px; }
  .search-box { width: 38px; padding: 0 4px; justify-content: center; border-color: rgba(255,255,255,0.15); }
  .search-box input { display: none; }
  .search-box button { width: 30px; height: 30px; }
  .topbar-right .btn-sm { padding: 0 14px; font-size: 13px; }
  .page-hero { padding: 52px 0; }
  .page-hero h1 { font-size: 27px; }
  .page-hero .hero-desc { font-size: 14px; }
  .hero-actions .btn { min-width: 130px; }
  .service-cards-wrap { grid-template-columns: 1fr; }
  .benefit-wrap { grid-template-columns: 1fr; gap: 32px; }
  .benefit-media img { height: 260px; }
  .process-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .faq-item.open .faq-a { max-height: 360px; }
  .cta-section h2 { font-size: 26px; }
  .category-note-inner { padding: 26px 22px; }
}
@media (max-width: 520px) {
  .brand-text { font-size: 18px; }
  .site-container { padding: 0 16px; }
  .section-head h2 { font-size: 24px; }
  .page-hero h1 { font-size: 23px; }
  .data-grid { grid-template-columns: 1fr; }
  .data-item .num { font-size: 36px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 220px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 220px; }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --gold: #C9A55A;
  --gold-hover: #A9853F;
  --gold-soft: rgba(201, 165, 90, 0.18);
  --gold-line: rgba(201, 165, 90, 0.4);
  --dark-bg: #0D0D0D;
  --dark-bg-2: #1A1A1A;
  --dark-bg-3: #222222;
  --light-bg: #F7F4EF;
  --light-card: #FFFFFF;
  --brown: #5C3A2E;
  --wine: #8B2635;
  --text-on-dark: #E5DCC8;
  --text-main: #2A2A2A;
  --text-muted: #6B6B6B;
  --border-light: #E5DCC8;
  --border-dark: rgba(255, 255, 255, 0.08);
  --radius-card: 8px;
  --radius-btn: 6px;
  --radius-input: 4px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.1);
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.25s ease;
  --container: 1200px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-serif); line-height: 1.35; font-weight: 700; }

/* ===== 容器 ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 区块通用 ===== */
.section { padding: 90px 0; }
.section-light { background: var(--light-bg); }
.section-dark { background: var(--dark-bg); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
  border: 1px solid var(--gold-line);
  padding: 4px 16px;
  border-radius: 30px;
  margin-bottom: 14px;
  background: rgba(201, 165, 90, 0.08);
}
.section-head h2 { font-size: 32px; color: var(--text-main); margin-bottom: 12px; }
.section-head p { color: var(--text-muted); font-size: 15px; }
.section-dark .section-head h2 { color: var(--text-on-dark); }
.section-dark .section-head p { color: rgba(229, 220, 200, 0.65); }

/* ===== 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}
.topbar {
  background: var(--dark-bg);
  height: 64px;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  display: block;
  width: 30px;
  height: 30px;
  border: 2px solid var(--gold);
  border-radius: 6px;
  position: relative;
  transform: rotate(45deg);
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px solid var(--gold);
  border-radius: 2px;
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.06em;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}
.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--gold-line);
  border-radius: 30px;
  padding: 0 6px 0 16px;
  height: 38px;
  width: 260px;
}
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-on-dark);
  font-size: 14px;
}
.search-box input::placeholder { color: rgba(229, 220, 200, 0.5); }
.search-box button {
  width: 40px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--gold);
  font-size: 14px;
  border-left: 1px solid rgba(201, 165, 90, 0.25);
  transition: var(--transition);
}
.search-box button:hover { color: #fff; }

/* ===== 第二行导航 ===== */
.main-nav {
  background: var(--dark-bg-2);
  border-top: 1px solid var(--border-dark);
}
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  min-height: 44px;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs a {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  font-size: 14px;
  color: rgba(229, 220, 200, 0.7);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.nav-tabs a:hover { color: var(--gold); }
.nav-tabs a.active {
  color: #fff;
  border-bottom-color: var(--gold);
  font-weight: 500;
}

/* ===== 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;
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
  line-height: 1.4;
  min-height: 44px;
}
.btn-primary {
  background: var(--gold);
  color: #1a1a1a;
}
.btn-primary:hover {
  background: var(--gold-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(201, 165, 90, 0.3);
}
.btn-outline {
  background: transparent;
  border-color: var(--gold-line);
  color: var(--gold);
}
.btn-outline:hover {
  background: var(--gold);
  color: #1a1a1a;
  transform: translateY(-2px);
}
.btn-lg { padding: 15px 40px; font-size: 16px; min-height: 52px; }
.btn-sm { padding: 8px 20px; font-size: 13px; min-height: 36px; }

/* ===== Hero ===== */
.page-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 90px 0 110px;
  color: var(--text-on-dark);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(13, 13, 13, 0.96) 20%, rgba(13, 13, 13, 0.82) 55%, rgba(13, 13, 13, 0.65) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(229, 220, 200, 0.55);
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(229, 220, 200, 0.55); }
.breadcrumb a:hover { color: var(--gold); }
.crumb-sep { color: rgba(229, 220, 200, 0.3); }
.hero-badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid var(--gold-line);
  padding: 4px 14px;
  border-radius: 30px;
  margin-bottom: 18px;
  background: rgba(201, 165, 90, 0.06);
}
.hero-left { flex: 1.1; }
.hero-left h1 {
  font-size: 38px;
  line-height: 1.35;
  color: #fff;
  margin-bottom: 18px;
}
.hero-left h1 .gold-text {
  color: var(--gold);
  position: relative;
  padding-bottom: 4px;
}
.hero-left h1 .gold-text::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.hero-sub {
  font-size: 15px;
  color: rgba(229, 220, 200, 0.78);
  max-width: 540px;
  margin-bottom: 34px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-right {
  flex: 0 0 360px;
  position: relative;
}
.hero-card {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--gold-line);
  border-radius: 14px;
  padding: 12px;
  backdrop-filter: none;
}
.hero-card img {
  border-radius: 10px;
  width: 100%;
  height: 320px;
  object-fit: cover;
}
.hero-card::before {
  content: "";
  position: absolute;
  top: -10px;
  right: -10px;
  width: 90px;
  height: 90px;
  border-top: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  border-radius: 0 14px 0 0;
  opacity: 0.5;
}
.hero-card::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: -10px;
  width: 90px;
  height: 90px;
  border-bottom: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
  border-radius: 0 0 0 14px;
  opacity: 0.5;
}
.hero-shield {
  position: absolute;
  top: -16px;
  right: -16px;
  width: 52px;
  height: 52px;
  background: var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1a1a1a;
  font-size: 20px;
  box-shadow: 0 4px 16px rgba(201, 165, 90, 0.4);
  z-index: 3;
}

/* ===== 功能卡片 ===== */
.feature-grid { row-gap: 24px; }
.feature-card {
  background: var(--light-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 30px 28px;
  height: 100%;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--gold);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--gold-line);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  display: inline-flex;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(201, 165, 90, 0.12);
  color: var(--gold);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border: 1px solid rgba(201, 165, 90, 0.3);
}
.feature-card h3 {
  font-size: 18px;
  color: var(--text-main);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ===== 数据带 ===== */
.metrics-band {
  background: var(--dark-bg-2);
  padding: 70px 0;
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}
.metric-item {
  text-align: center;
  padding: 16px 10px;
  position: relative;
}
.metric-item + .metric-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 48px;
  background: rgba(201, 165, 90, 0.2);
}
.metric-num {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.2;
  margin-bottom: 6px;
}
.metric-label {
  font-size: 14px;
  color: rgba(229, 220, 200, 0.6);
}

/* ===== 防护机制图文块 ===== */
.security-block {
  display: flex;
  align-items: center;
  gap: 56px;
  margin-bottom: 80px;
}
.security-block:last-child { margin-bottom: 0; }
.security-block.reverse { flex-direction: row-reverse; }
.security-media {
  flex: 1;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.security-media img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}
.security-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(13, 13, 13, 0.25));
  border-radius: 12px;
}
.security-content { flex: 1; }
.security-content .section-tag { margin-bottom: 12px; }
.security-content h3 {
  font-size: 26px;
  color: var(--text-main);
  margin-bottom: 14px;
  line-height: 1.4;
}
.security-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 16px;
}
.security-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-main);
  padding: 6px 0;
}
.security-list li i {
  color: var(--gold);
  margin-top: 6px;
  font-size: 13px;
}

/* ===== 流程步骤 ===== */
.process-wrap {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.process-step {
  flex: 1 1 220px;
  background: var(--dark-bg-2);
  border: 1px solid var(--gold-line);
  border-radius: var(--radius-card);
  padding: 32px 26px;
  position: relative;
  transition: var(--transition);
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  background: var(--dark-bg-3);
}
.step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--gold);
  opacity: 0.75;
  margin-bottom: 14px;
  line-height: 1;
}
.process-step h4 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: rgba(229, 220, 200, 0.6);
  line-height: 1.7;
}
.process-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--gold);
}
@media (min-width: 1025px) {
  .process-wrap { flex-wrap: nowrap; }
  .process-connector { flex: 0 0 30px; }
}

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active { border-left-color: var(--gold-hover); box-shadow: var(--shadow-hover); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
}
.faq-icon {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--gold-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--gold);
  transition: var(--transition);
}
.faq-item.active .faq-icon {
  background: var(--gold);
  color: #1a1a1a;
  transform: rotate(180deg);
}
.faq-answer {
  display: none;
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
  border-top: 1px dashed var(--border-light);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-band {
  background: var(--dark-bg);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border: 2px solid rgba(201, 165, 90, 0.12);
  border-radius: 50%;
}
.cta-band::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 320px;
  height: 320px;
  border: 2px solid rgba(201, 165, 90, 0.08);
  border-radius: 50%;
}
.cta-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-info h3 {
  font-size: 26px;
  color: #fff;
  margin-bottom: 10px;
}
.cta-info p {
  font-size: 15px;
  color: rgba(229, 220, 200, 0.7);
  margin-bottom: 4px;
}
.cta-info p i {
  color: var(--gold);
  margin-right: 8px;
  width: 18px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark-bg);
  color: #9A9A9A;
  border-top: 2px solid var(--gold-line);
}
.footer-top {
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(154, 154, 154, 0.85);
  margin-top: 14px;
}
.footer-col h4 {
  font-size: 15px;
  color: var(--text-on-dark);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 14px;
  color: #9A9A9A;
  transition: var(--transition);
}
.footer-col ul a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(154, 154, 154, 0.7);
}
.brand-inline {
  color: var(--gold);
  font-family: var(--font-serif);
  font-weight: 700;
}

/* ===== Focus / 可访问性 ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .section { padding: 70px 0; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero-left { text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-right { flex: 0 0 auto; width: 100%; max-width: 360px; margin: 0 auto; }
  .security-block, .security-block.reverse { flex-direction: column; gap: 32px; }
  .security-media { width: 100%; }
  .security-media img { height: 260px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .metric-item + .metric-item::before { display: none; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 26px; }
  .topbar { height: 56px; }
  .topbar-inner { height: 56px; }
  .search-box { display: none; }
  .hero-left h1 { font-size: 28px; }
  .hero-card img { height: 240px; }
  .metrics-band { padding: 50px 0; }
  .metric-num { font-size: 30px; }
  .process-wrap { flex-direction: column; }
  .process-connector { transform: rotate(90deg); padding: 6px 0; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-info { text-align: center; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .nav-tabs a { padding: 10px 14px; font-size: 13px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-left h1 { font-size: 24px; }
  .hero-sub { font-size: 14px; }
  .btn-lg { padding: 14px 28px; font-size: 15px; }
  .feature-card { padding: 24px 20px; }
  .faq-question { font-size: 15px; padding: 16px 18px; }
  .faq-answer { padding: 0 18px 18px; }
  .brand-text { font-size: 19px; }
}