/* roulang page: index */
/* ============================================================
   设计变量
============================================================ */
:root{
  --primary:#1F4A3D;
  --primary-dark:#15362D;
  --primary-light:#2E5F4E;
  --secondary:#7A9B8A;
  --accent:#C9A86A;
  --accent-dark:#B8964E;
  --bg:#F5F1E8;
  --bg-dark:#0F1412;
  --card:#FFFFFF;
  --card-alt:#FAF8F2;
  --text:#2A2A2A;
  --muted:#6B6B6B;
  --border:#E5E0D4;
  --radius:12px;
  --radius-btn:6px;
  --radius-input:8px;
  --shadow:0 1px 3px rgba(26,26,26,.06),0 8px 24px -12px rgba(26,26,26,.10);
  --shadow-hover:0 2px 6px rgba(26,26,26,.08),0 16px 32px -12px rgba(26,26,26,.18);
  --font-serif:'Noto Serif SC','Source Han Serif SC','Songti SC',serif;
  --font-sans:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
}
/* ============================================================
   Reset / Base
============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  background-image:linear-gradient(rgba(31,74,61,.018) 1px,transparent 1px);
  background-size:100% 48px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-light)}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}
input,textarea{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-serif);line-height:1.3;font-weight:700;letter-spacing:.02em}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{margin-bottom:56px}
.section-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--accent-dark);font-weight:600;
  letter-spacing:.08em;margin-bottom:12px;
}
.section-label::before{
  content:"";display:inline-block;width:24px;height:2px;background:var(--accent);
}
.section-title{font-size:34px;line-height:1.35;margin-bottom:16px}
.section-desc{font-size:16px;color:var(--muted);max-width:720px;line-height:1.75}
/* ============================================================
   按钮
============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;line-height:1.4;
  transition:all .25s ease;border:1px solid transparent;
  text-align:center;vertical-align:middle;
}
.btn-primary{
  background:var(--accent);color:#1a1a1a;border-color:var(--accent);
}
.btn-primary:hover{
  background:var(--accent-dark);border-color:var(--accent-dark);
  color:#1a1a1a;transform:translateY(-1px);
  box-shadow:0 4px 16px rgba(201,168,106,.35);
}
.btn-primary:active{transform:translateY(0)}
.btn-primary:focus{outline:3px solid rgba(201,168,106,.35);outline-offset:2px}
.btn-outline-light{
  background:transparent;border-color:rgba(255,255,255,.55);color:#fff;
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.12);border-color:var(--accent);color:#fff;
}
.btn-outline-dark{
  background:transparent;border-color:var(--border);color:var(--text);
}
.btn-outline-dark:hover{
  background:rgba(31,74,61,.06);border-color:var(--accent);color:var(--primary);
}
.btn-lg{padding:14px 36px;font-size:17px}
.btn-block{width:100%}
/* ============================================================
   顶部导航
============================================================ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(15,20,18,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--accent);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;max-width:1200px;margin:0 auto;padding:0 24px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{
  font-family:var(--font-serif);font-size:22px;font-weight:700;
  color:var(--bg);letter-spacing:.03em;line-height:1.2;
}
.brand-sub{
  font-size:12px;color:rgba(255,255,255,.6);
  letter-spacing:.12em;border-left:1px solid var(--accent);
  padding-left:10px;line-height:1.2;
}
.site-nav{display:flex;align-items:center;gap:4px;margin:0 16px}
.site-nav a{
  display:inline-block;padding:8px 16px;color:rgba(255,255,255,.85);
  font-size:15px;font-weight:500;border-radius:6px;position:relative;
  transition:color .2s,background .2s;
}
.site-nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.site-nav a.active{color:var(--accent);font-weight:600}
.site-nav a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;
  height:2px;background:var(--accent);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{
  position:relative;display:flex;align-items:center;
  width:220px;height:38px;border-radius:var(--radius-input);
  background:rgba(255,255,255,.12);overflow:hidden;
  transition:width .3s ease,background .3s,border-color .3s;
  border:1px solid transparent;
}
.search-box:focus-within{
  width:280px;background:rgba(255,255,255,.16);
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(201,168,106,.15);
}
.search-box svg{
  flex-shrink:0;width:18px;height:18px;margin:0 10px;fill:rgba(255,255,255,.6);
}
.search-box input{
  flex:1;background:transparent;border:none;outline:none;
  color:#fff;font-size:14px;height:100%;
}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.header-icon{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,.8);transition:background .2s,color .2s;
}
.header-icon:hover{background:rgba(255,255,255,.1);color:#fff}
.header-icon svg{width:20px;height:20px;fill:currentColor}
.header-cta{padding:9px 20px;font-size:14px}
.menu-toggle{display:none}
/* 移动端导航面板 */
.mobile-nav{
  display:none;position:fixed;top:72px;left:0;right:0;z-index:999;
  background:rgba(15,20,18,.97);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--accent);padding:24px;
  transform:translateY(-8px);transition:opacity .25s,transform .25s;
}
.mobile-nav.open{display:block;transform:translateY(0)}
.mobile-nav a{
  display:block;padding:14px 8px;color:rgba(255,255,255,.9);
  font-size:16px;font-weight:500;border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-nav a:hover{color:var(--accent)}
.mobile-nav .mobile-cta{
  display:block;text-align:center;margin-top:20px;
  padding:12px;border-radius:var(--radius-btn);font-weight:600;
}
.mobile-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.1);border-radius:var(--radius-input);
  padding:10px 14px;margin-bottom:16px;
}
.mobile-search input{
  flex:1;background:transparent;border:none;outline:none;
  color:#fff;font-size:14px;
}
.mobile-search input::placeholder{color:rgba(255,255,255,.45)}
/* ============================================================
   Hero
============================================================ */
.hero{
  position:relative;
  min-height:72vh;
  display:flex;align-items:center;
  background:linear-gradient(180deg,rgba(15,20,18,.80),rgba(21,54,45,.92)),
  url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  padding:120px 0 100px;
  color:#fff;
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:80px;
  background:linear-gradient(to top,var(--bg-dark),transparent);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.12);border:1px solid rgba(201,168,106,.4);
  padding:6px 16px;border-radius:30px;
  font-size:13px;letter-spacing:.06em;color:var(--accent);
  margin-bottom:28px;
}
.hero-badge .dot{
  width:6px;height:6px;border-radius:50%;background:var(--accent);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:44px;line-height:1.28;font-weight:700;color:#fff;
  max-width:640px;margin-bottom:24px;letter-spacing:.02em;
}
.hero h1 .gold-border{
  display:block;width:64px;height:3px;background:var(--accent);
  margin-top:20px;border-radius:3px;
}
.hero-desc{
  font-size:17px;color:rgba(255,255,255,.85);
  max-width:600px;line-height:1.8;margin-bottom:36px;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
/* 信任数据条 */
.trust-bar{
  background:var(--bg-dark);border-top:1px solid rgba(201,168,106,.2);
  border-bottom:1px solid rgba(201,168,106,.2);
  padding:40px 0;position:relative;z-index:3;
}
.stat-item{text-align:center;padding:12px 0}
.stat-num{
  font-family:'Georgia',serif;font-size:36px;line-height:1.1;color:var(--accent);
  display:inline-block;background:rgba(255,255,255,.06);
  border:1px solid rgba(201,168,106,.35);border-radius:8px;
  padding:8px 20px;min-width:120px;
}
.stat-label{margin-top:12px;font-size:14px;color:rgba(255,255,255,.65)}
/* ============================================================
   卖点三连
============================================================ */
.features{
  background:var(--bg);
  background-image:linear-gradient(rgba(31,74,61,.02) 1px,transparent 1px);
  background-size:100% 48px;
}
.feature-card{
  background:var(--card);border:1px solid var(--border);
  border-top:3px solid var(--accent);border-radius:var(--radius);
  padding:32px;height:100%;
  box-shadow:var(--shadow);
  transition:transform .3s,box-shadow .3s;
  display:flex;flex-direction:column;position:relative;overflow:hidden;
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-top-color:var(--accent-dark);
}
.feature-top{
  display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;
}
.feature-num{
  font-family:'Georgia',serif;font-size:28px;color:var(--accent);
  line-height:1;
}
.feature-icon{
  width:44px;height:44px;border-radius:10px;
  background:#EAF0EC;display:flex;align-items:center;justify-content:center;
  transition:transform .25s;
}
.feature-card:hover .feature-icon{transform:scale(1.05)}
.feature-icon svg{width:22px;height:22px;fill:var(--primary)}
.feature-card h3{font-size:22px;margin-bottom:12px}
.feature-card p{
  font-size:15px;color:var(--muted);line-height:1.7;
  flex:1;margin-bottom:20px;
}
.feature-link{
  font-size:14px;font-weight:600;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
  transition:gap .2s,color .2s;
}
.feature-link:hover{color:var(--accent-dark);gap:10px}
.feature-link svg{width:16px;height:16px;fill:currentColor}
/* ============================================================
   场景演示
============================================================ */
.scenes{background:var(--bg)}
.scene-block{
  display:flex;align-items:center;gap:64px;
  margin-bottom:96px;position:relative;
}
.scene-block:last-child{margin-bottom:0}
.scene-block:nth-child(even){flex-direction:row-reverse}
.scene-media{
  flex:1;position:relative;
}
.scene-frame{
  border:1px solid var(--border);background:#fff;
  padding:8px;border-radius:8px;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.scene-frame img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:4px;
  transition:transform .4s;
}
.scene-block:hover .scene-frame img{transform:scale(1.02)}
.scene-badge{
  position:absolute;bottom:-14px;left:24px;
  background:rgba(15,20,18,.85);border:1px solid var(--accent);
  color:var(--accent);font-size:13px;font-weight:600;
  padding:6px 16px;border-radius:20px;letter-spacing:.04em;
  backdrop-filter:blur(4px);
}
.scene-content{flex:1}
.scene-content h3{
  font-size:26px;margin-bottom:16px;line-height:1.4;
  display:flex;align-items:center;gap:12px;
}
.scene-content h3::before{
  content:"";display:inline-block;width:8px;height:26px;
  background:var(--accent);border-radius:4px;
}
.scene-content p{
  font-size:16px;color:var(--muted);line-height:1.8;margin-bottom:20px;
}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.scene-tags span{
  display:inline-block;padding:6px 14px;border-radius:4px;
  background:#EAF0EC;color:var(--primary);font-size:13px;
  border:1px solid #DCE5DD;font-weight:500;
}
.scene-tags span.gold{
  background:#F7EFDC;color:#8C6D2F;border-color:#E8D9B0;
}
/* ============================================================
   社会认同
============================================================ */
.social-proof{
  background:#EFE9DC;position:relative;
  border-top:3px solid var(--accent);border-bottom:1px solid var(--border);
}
.social-proof::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--accent);opacity:.6;
}
.review-card{
  background:#fff;border:1px solid var(--border);border-radius:8px;
  padding:32px;height:100%;position:relative;box-shadow:var(--shadow);
  border-left:3px solid var(--accent);
}
.review-quote{
  position:absolute;top:20px;right:24px;
  font-family:'Georgia',serif;font-size:56px;line-height:1;
  color:rgba(201,168,106,.2);
}
.review-stars{margin-bottom:14px;display:flex;gap:2px}
.review-stars svg{width:18px;height:18px;fill:var(--accent)}
.review-text{
  font-size:15px;color:var(--text);line-height:1.75;
  margin-bottom:18px;padding-right:10px;position:relative;z-index:1;
}
.review-meta{
  display:flex;align-items:center;gap:12px;
  border-top:1px solid var(--border);padding-top:16px;
}
.review-avatar{
  width:40px;height:40px;border-radius:50%;
  background:var(--primary);color:#fff;display:flex;
  align-items:center;justify-content:center;font-size:15px;font-weight:600;
  font-family:var(--font-serif);
}
.review-name{font-size:15px;font-weight:600}
.review-time{font-size:13px;color:var(--muted)}
.verified-badge{
  margin-left:auto;display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:4px;
  background:#EAF0EC;color:var(--primary);font-size:12px;
  border:1px solid #DCE5DD;font-weight:500;
}
.proof-stats{
  margin-top:48px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:32px 24px;box-shadow:var(--shadow);
}
.proof-stat{text-align:center}
.proof-stat .num{
  font-family:'Georgia',serif;font-size:32px;color:var(--primary);
  display:block;line-height:1.2;
}
.proof-stat .lbl{
  font-size:13px;color:var(--muted);margin-top:4px;display:block;
}
/* ============================================================
   FAQ 手风琴
============================================================ */
.faq{background:var(--bg)}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:8px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .25s,box-shadow .25s;
}
.faq-item:hover{border-color:var(--secondary)}
.faq-item details summary{
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;padding:20px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:500;color:var(--text);
  transition:color .2s,background .2s;position:relative;
}
.faq-item details summary::-webkit-details-marker{display:none}
.faq-item details summary:hover{background:var(--card-alt)}
.faq-item details[open] summary{
  background:var(--card-alt);color:var(--primary);font-weight:600;
  border-left:3px solid var(--accent);
}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--accent);display:flex;align-items:center;justify-content:center;
  color:var(--accent);font-size:14px;font-weight:700;
  transition:transform .25s,background .25s;
}
.faq-item details[open] .faq-icon{
  background:var(--accent);color:#fff;transform:rotate(45deg);
}
.faq-answer{padding:0 24px 20px;font-size:15px;color:var(--muted);line-height:1.75}
/* ============================================================
   底部CTA
============================================================ */
.bottom-cta{
  position:relative;padding:100px 0;
  background:linear-gradient(180deg,rgba(21,54,45,.94),rgba(15,20,18,.97)),
  url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  text-align:center;color:#fff;
}
.bottom-cta .section-title{color:#fff}
.bottom-cta p{
  font-size:17px;color:rgba(255,255,255,.75);
  max-width:560px;margin:0 auto 36px;line-height:1.8;
}
.bottom-cta .gold-line{
  width:64px;height:3px;background:var(--accent);
  margin:0 auto 24px;border-radius:3px;
}
/* ============================================================
   页脚
============================================================ */
.site-footer{
  background:var(--bg-dark);color:#C9C9C9;
  padding:72px 0 32px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
}
.footer-brand{
  font-family:var(--font-serif);font-size:22px;font-weight:700;
  color:#fff;display:block;margin-bottom:12px;
}
.footer-desc{font-size:14px;line-height:1.7;color:rgba(255,255,255,.6);margin-bottom:16px;max-width:260px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:36px;height:36px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.7);
  transition:background .2s,color .2s,transform .2s;
}
.footer-social a:hover{background:var(--accent);color:#1a1a1a;transform:translateY(-2px)}
.footer-social svg{width:16px;height:16px;fill:currentColor}
.footer-title{
  font-size:16px;font-weight:600;color:#fff;margin-bottom:20px;
  font-family:var(--font-serif);letter-spacing:.04em;
}
.footer-links li{margin-bottom:10px}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,.65);
  transition:color .2s,padding-left .2s;
}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-contact li{
  font-size:14px;color:rgba(255,255,255,.65);
  margin-bottom:10px;display:flex;align-items:flex-start;gap:8px;
}
.footer-contact svg{flex-shrink:0;width:16px;height:16px;fill:rgba(255,255,255,.4);margin-top:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:48px;padding-top:24px;
  display:flex;justify-content:space-between;flex-wrap:wrap;
  gap:12px;font-size:13px;color:rgba(255,255,255,.4);
}
.footer-bottom a{color:rgba(255,255,255,.4)}
.footer-bottom a:hover{color:var(--accent)}
/* ============================================================
   底部固定转化条
============================================================ */
.fixed-bar{
  position:fixed;bottom:0;left:0;right:0;z-index:999;
  background:rgba(15,20,18,.92);backdrop-filter:blur(12px);
  border-top:1px solid var(--accent);
  padding:10px 0;transform:translateY(100%);
  transition:transform .35s ease;
}
.fixed-bar.visible{transform:translateY(0)}
.fixed-bar-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:52px;
}
.fixed-bar-text{
  font-size:15px;color:#fff;font-family:var(--font-serif);
  display:flex;align-items:center;gap:10px;
}
.fixed-bar-text::before{
  content:"";width:4px;height:20px;background:var(--accent);border-radius:2px;
}
.fixed-bar-actions{display:flex;gap:12px;flex-shrink:0}
.fixed-bar-actions .btn{padding:10px 22px;font-size:14px}
body{padding-bottom:72px}
/* ============================================================
   响应式
============================================================ */
@media screen and (max-width:1023px){
  .site-nav,.header-actions .search-box,.header-icon-group{display:none}
  .menu-toggle{display:flex}
  .header-actions{gap:8px}
  .header-cta{padding:8px 16px;font-size:13px}
  .section{padding:72px 0}
  .hero{padding:100px 0 80px;min-height:auto}
  .hero h1{font-size:36px}
  .scene-block{gap:32px;flex-direction:column!important;margin-bottom:64px}
  .scene-content{width:100%}
  .scene-media{width:100%}
  .section-title{font-size:28px}
  .feature-card{padding:24px}
  .review-card{padding:24px}
}
@media screen and (max-width:639px){
  .container{padding:0 16px}
  .section{padding:64px 0}
  .hero{padding:80px 0 60px}
  .hero h1{font-size:30px}
  .hero-desc{font-size:15px}
  .hero-btns{flex-direction:column}
  .hero-btns .btn{width:100%}
  .stat-num{font-size:28px;min-width:100px;padding:8px 14px}
  .section-title{font-size:25px}
  .feature-card{padding:24px}
  .scene-tags{gap:6px}
  .scene-tags span{padding:5px 10px;font-size:12px}
  .fixed-bar-inner{flex-direction:column;padding:8px 16px;gap:8px}
  .fixed-bar-text{font-size:14px}
  .fixed-bar-actions{width:100%}
  .fixed-bar-actions .btn{flex:1;text-align:center}
  .footer-bottom{flex-direction:column;text-align:center}
  .header-inner{height:64px;padding:0 16px}
  .brand-logo{font-size:19px}
  .brand-sub{font-size:11px;padding-left:8px}
  .mobile-nav{top:64px}
}