/* roulang page: index */
:root {
  --primary-dark:#0E1A12;
  --primary-darker:#0C120D;
  --accent-gold:#C9A063;
  --accent-light:#D9B57A;
  --accent-brick:#A7553B;
  --success-green:#3E7A54;
  --warn-orange:#C77A2E;
  --light-bg:#F3EFE7;
  --light-card:#EDE8DD;
  --neutral-dark:#1A201B;
  --neutral-card:#232B24;
  --text-dark:#1A241D;
  --text-sec-dark:#5C6E60;
  --text-light:#EDE8DD;
  --text-sec-light:#A8B5A8;
  --border-light:#E0DACD;
  --border-gold:rgba(201,160,99,.25);
  --border-gold-strong:rgba(201,160,99,.6);
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-card:0 1px 3px rgba(0,0,0,.06),0 4px 14px rgba(0,0,0,.04);
  --shadow-dark:0 8px 24px rgba(0,0,0,.35);
  --shadow-hover:0 12px 32px rgba(0,0,0,.28);
  --transition:.25s ease;
  --font-main:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --font-num:"DIN Alternate","Oswald","Rajdhani","Roboto Condensed",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-main);color:var(--text-dark);background:var(--light-bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-pad{padding:100px 0}
.section-head{margin-bottom:56px}
.section-head.center{text-align:center}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--accent-gold);font-size:.85rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
.section-head .eyebrow::before{content:"";width:28px;height:1px;background:var(--accent-gold)}
.section-head.center .eyebrow::after{content:"";width:28px;height:1px;background:var(--accent-gold)}
.section-head h2{font-size:clamp(1.8rem,3.5vw,2.8rem);line-height:1.3;font-weight:800;color:var(--text-dark);letter-spacing:.01em}
.section-head .sub{max-width:640px;color:var(--text-sec-dark);font-size:1rem;margin-top:16px;line-height:1.8}
.section-head.center .sub{margin-left:auto;margin-right:auto}
.section-head.light h2{color:var(--text-light)}
.section-head.light .sub{color:var(--text-sec-light)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:10px;font-weight:700;font-size:1rem;line-height:1;transition:all var(--transition);border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,#C9A063,#8F6B3E);color:var(--primary-darker);box-shadow:0 4px 16px rgba(201,160,99,.25)}
.btn-primary:hover{background:linear-gradient(135deg,#D9B57A,#A07A4A);transform:translateY(-2px);box-shadow:0 8px 24px rgba(201,160,99,.4);color:var(--primary-darker)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary:focus-visible{outline:3px solid rgba(201,160,99,.6);outline-offset:2px}
.btn-outline{background:transparent;border-color:var(--border-gold-strong);color:var(--accent-gold)}
.btn-outline:hover{background:rgba(201,160,99,.12);border-color:var(--accent-light);color:var(--accent-light)}
.btn-outline:active{transform:translateY(1px)}
.btn-outline:focus-visible{outline:3px solid rgba(201,160,99,.5);outline-offset:2px}
.btn-lg{padding:18px 44px;font-size:1.1rem;border-radius:12px}
.btn-block{width:100%;justify-content:center}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;border:1px solid var(--border-gold);color:var(--accent-gold);font-size:.78rem;font-weight:600;background:rgba(14,26,18,.5)}
.badge-solid{background:linear-gradient(135deg,rgba(201,160,99,.2),rgba(201,160,99,.08));border-color:var(--border-gold-strong)}
/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(14,26,18,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-gold);transition:box-shadow var(--transition)}
.site-header.scrolled{box-shadow:0 4px 24px rgba(0,0,0,.4)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:800;color:var(--text-light);letter-spacing:.02em;white-space:nowrap}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,#C9A063,#8F6B3E);border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--primary-darker);flex-shrink:0}
.logo span{color:var(--accent-gold)}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{color:var(--text-sec-light);font-size:.95rem;font-weight:600;padding:8px 2px;position:relative;transition:color var(--transition)}
.main-nav a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--accent-gold);transition:width var(--transition)}
.main-nav a:hover{color:var(--text-light)}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.main-nav a.active{color:var(--accent-gold)}
.header-cta{display:flex;align-items:center;gap:16px}
.header-cta .btn{padding:10px 22px;font-size:.9rem}
.header-link{color:var(--text-sec-light);font-size:.9rem;font-weight:600}
.header-link:hover{color:var(--accent-gold)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:8px;border:1px solid var(--border-gold);align-items:center;justify-content:center;flex-direction:column;gap:5px;background:transparent}
.nav-toggle span{width:20px;height:2px;background:var(--accent-gold);transition:all var(--transition)}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{display:none;position:fixed;top:76px;left:0;right:0;background:var(--primary-dark);border-bottom:1px solid var(--border-gold);padding:24px;flex-direction:column;gap:4px;z-index:999}
.mobile-drawer.open{display:flex}
.mobile-drawer a{padding:14px 16px;border-radius:8px;color:var(--text-sec-light);font-weight:600;font-size:1rem}
.mobile-drawer a:hover{background:rgba(201,160,99,.1);color:var(--accent-gold)}
.mobile-drawer .btn{margin-top:12px;justify-content:center}
/* hero */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;background-image:linear-gradient(rgba(10,15,11,.7),rgba(10,15,11,.75)),url('/assets/images/backpic/back-1.jpg');background-size:cover;background-position:center;padding:140px 0 0;overflow:hidden}
.hero-content{position:relative;z-index:2;max-width:760px;padding-bottom:80px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:999px;background:rgba(14,26,18,.6);border:1px solid var(--border-gold);color:var(--accent-gold);font-size:.85rem;font-weight:600;margin-bottom:28px}
.hero-badge::before{content:"";width:8px;height:8px;background:var(--accent-gold);border-radius:50%;box-shadow:0 0 12px rgba(201,160,99,.6)}
.hero h1{font-size:clamp(2.4rem,6vw,4.4rem);line-height:1.2;font-weight:900;color:var(--text-light);letter-spacing:.01em;margin-bottom:24px}
.hero h1 .gold{color:var(--accent-gold)}
.hero-desc{font-size:1.15rem;line-height:1.9;color:var(--text-sec-light);max-width:600px;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:52px}
.hero-stats{display:flex;gap:0;border-top:1px solid var(--border-gold);padding-top:32px;max-width:560px}
.hero-stat{flex:1;padding:0 24px;border-left:1px solid var(--border-gold)}
.hero-stat:first-child{padding-left:0;border-left:none}
.hero-stat .num{font-family:var(--font-num);font-size:2rem;font-weight:700;color:var(--accent-gold);line-height:1.2}
.hero-stat .label{font-size:.8rem;color:var(--text-sec-light);margin-top:4px}
.scroll-hint{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);color:var(--text-sec-light);font-size:.8rem;letter-spacing:.2em;display:flex;flex-direction:column;align-items:center;gap:6px}
.scroll-hint::after{content:"";width:1px;height:28px;background:linear-gradient(to bottom,var(--accent-gold),transparent)}
/* pain section */
.pain-section{background:var(--light-bg);position:relative}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.pain-card{position:relative;background:var(--neutral-dark);border-radius:var(--radius-md);padding:36px 28px 32px;border:1px solid rgba(201,160,99,.15);transition:all var(--transition);overflow:hidden}
.pain-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-gold),transparent)}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--border-gold-strong)}
.pain-num{position:absolute;top:16px;right:20px;font-family:var(--font-num);font-size:2.4rem;font-weight:700;color:rgba(201,160,99,.18);line-height:1}
.pain-icon{width:48px;height:48px;border-radius:10px;background:linear-gradient(135deg,rgba(201,160,99,.2),rgba(201,160,99,.05));border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;font-size:1.3rem;margin-bottom:20px}
.pain-card h3{color:var(--text-light);font-size:1.15rem;font-weight:700;margin-bottom:12px}
.pain-card p{color:var(--text-sec-light);font-size:.92rem;line-height:1.75}
.pain-note{margin-top:56px;text-align:center;padding:24px 32px;background:var(--neutral-card);border-radius:var(--radius-md);border-left:4px solid var(--accent-brick);color:var(--text-sec-light);font-size:.95rem}
/* solution section */
.solution-section{position:relative;background-image:linear-gradient(rgba(14,26,18,.92),rgba(14,26,18,.96)),url('/assets/images/backpic/back-2.jpg');background-size:cover;background-position:center;background-attachment:fixed}
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.solution-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-dark);border:1px solid var(--border-gold)}
.solution-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:5/4}
.solution-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(14,26,18,.4),transparent)}
.solution-media .media-tag{position:absolute;top:20px;left:20px;z-index:2;padding:6px 14px;background:rgba(14,26,18,.75);border:1px solid var(--border-gold);border-radius:999px;color:var(--accent-gold);font-size:.8rem;font-weight:600}
.solution-list{display:flex;flex-direction:column;gap:32px}
.solution-item{display:flex;gap:20px;padding:24px;background:rgba(26,32,27,.7);border-radius:var(--radius-md);border:1px solid rgba(201,160,99,.12);transition:all var(--transition)}
.solution-item:hover{border-color:var(--border-gold-strong);transform:translateX(4px)}
.solution-item-num{flex-shrink:0;width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,#C9A063,#8F6B3E);display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:700;font-size:1.1rem;color:var(--primary-darker)}
.solution-item h4{color:var(--text-light);font-size:1.1rem;font-weight:700;margin-bottom:6px}
.solution-item p{color:var(--text-sec-light);font-size:.92rem;line-height:1.7}
/* results section */
.results-section{background:var(--primary-dark);position:relative;overflow:hidden}
.results-section::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent-gold),transparent)}
.results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:64px}
.result-metric{text-align:center;padding:36px 20px;background:var(--neutral-card);border-radius:var(--radius-md);border:1px solid var(--border-gold);position:relative}
.result-metric::after{content:"";position:absolute;bottom:-1px;left:50%;transform:translateX(-50%);width:40%;height:3px;background:linear-gradient(90deg,transparent,var(--accent-gold),transparent)}
.result-metric .num{font-family:var(--font-num);font-size:clamp(2rem,4vw,3.2rem);font-weight:700;color:var(--accent-gold);line-height:1.1}
.result-metric .num .unit{font-size:.6em;margin-left:2px}
.result-metric .label{color:var(--text-sec-light);font-size:.9rem;margin-top:10px}
.result-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.result-card{background:var(--neutral-dark);border-radius:var(--radius-md);padding:32px;border:1px solid var(--border-gold);display:flex;gap:20px;transition:all var(--transition)}
.result-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.result-card-icon{flex-shrink:0;width:48px;height:48px;border-radius:10px;background:rgba(201,160,99,.12);border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;font-size:1.3rem}
.result-card h4{color:var(--text-light);font-size:1.1rem;font-weight:700;margin-bottom:8px}
.result-card p{color:var(--text-sec-light);font-size:.9rem;line-height:1.75;margin-bottom:12px}
.result-card .tag{display:inline-flex;padding:4px 12px;background:rgba(201,160,99,.12);border:1px solid var(--border-gold);border-radius:999px;color:var(--accent-gold);font-size:.75rem;font-weight:600}
/* testimonial */
.testi-section{background:var(--light-bg)}
.testi-layout{display:grid;grid-template-columns:1fr 2fr;gap:64px;align-items:start}
.testi-intro .section-head{margin-bottom:24px}
.testi-intro .intro-text{color:var(--text-sec-dark);font-size:.95rem;line-height:1.8;margin-bottom:24px}
.testi-intro .overall-score{display:flex;align-items:center;gap:16px;padding:20px;background:var(--light-card);border-radius:var(--radius-md);border:1px solid var(--border-light)}
.testi-intro .score-num{font-family:var(--font-num);font-size:2.4rem;font-weight:700;color:var(--accent-brick)}
.testi-intro .score-stars{color:var(--accent-gold);font-size:1rem;letter-spacing:2px}
.testi-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.testi-card{background:var(--light-card);border-radius:var(--radius-md);padding:32px;border:1px solid var(--border-light);border-top:3px solid var(--accent-gold);box-shadow:var(--shadow-card);transition:all var(--transition)}
.testi-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.testi-quote{font-size:3rem;line-height:1;color:var(--accent-gold);opacity:.4;margin-bottom:8px;font-family:Georgia,serif}
.testi-text{color:var(--text-dark);font-size:.95rem;line-height:1.8;margin-bottom:20px}
.testi-person{display:flex;align-items:center;gap:12px;padding-top:16px;border-top:1px solid var(--border-light)}
.testi-avatar{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid var(--accent-gold)}
.testi-name{font-weight:700;font-size:.9rem;color:var(--text-dark)}
.testi-role{font-size:.78rem;color:var(--text-sec-dark)}
.testi-stars{color:var(--accent-gold);font-size:.8rem;margin-left:auto;letter-spacing:1px}
/* cta section */
.cta-section{position:relative;background-image:linear-gradient(rgba(10,15,11,.82),rgba(10,15,11,.85)),url('/assets/images/backpic/back-3.jpg');background-size:cover;background-position:center;padding:120px 0;text-align:center}
.cta-section::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent-gold),transparent)}
.cta-section::after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent-gold),transparent)}
.cta-inner{max-width:720px;margin:0 auto;position:relative;z-index:2}
.cta-inner h2{font-size:clamp(2rem,4.5vw,3.4rem);font-weight:900;color:var(--text-light);line-height:1.3;margin-bottom:20px}
.cta-inner h2 .gold{color:var(--accent-gold)}
.cta-inner p{font-size:1.1rem;color:var(--text-sec-light);line-height:1.9;margin-bottom:40px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
/* faq */
.faq-section{background:var(--light-bg)}
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--light-card);border-radius:var(--radius-md);border:1px solid var(--border-light);margin-bottom:16px;overflow:hidden;transition:border-color var(--transition)}
.faq-item.active{border-color:var(--border-gold-strong)}
.faq-question{width:100%;text-align:left;padding:22px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:1rem;font-weight:700;color:var(--text-dark);min-height:64px}
.faq-question:hover{color:var(--text-dark)}
.faq-icon{flex-shrink:0;width:32px;height:32px;border-radius:50%;border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;transition:all var(--transition);color:var(--accent-gold);font-size:.9rem;font-weight:400}
.faq-item.active .faq-icon{background:var(--accent-gold);color:var(--primary-darker);transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 28px}
.faq-item.active .faq-answer{max-height:500px;padding:0 28px 24px}
.faq-answer p{color:var(--text-sec-dark);font-size:.92rem;line-height:1.8}
/* footer */
.site-footer{background:var(--primary-darker);border-top:1px solid var(--border-gold);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--text-sec-light);font-size:.9rem;line-height:1.8;margin-bottom:20px}
.footer-social{display:flex;gap:12px}
.footer-social a{width:36px;height:36px;border-radius:8px;border:1px solid var(--border-gold);display:flex;align-items:center;justify-content:center;color:var(--accent-gold);font-size:.9rem;transition:all var(--transition)}
.footer-social a:hover{background:rgba(201,160,99,.12);transform:translateY(-2px)}
.footer-col h4{color:var(--text-light);font-size:1rem;font-weight:700;margin-bottom:20px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:24px;height:2px;background:var(--accent-gold)}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{color:var(--text-sec-light);font-size:.9rem;transition:all var(--transition)}
.footer-col ul a:hover{color:var(--accent-gold);padding-left:6px}
.footer-col ul a::before{content:"›";margin-right:6px;color:var(--accent-gold)}
.footer-contact{font-size:.9rem;color:var(--text-sec-light);line-height:2}
.footer-contact strong{color:var(--accent-gold);font-weight:600}
.footer-bottom{border-top:1px solid rgba(201,160,99,.15);padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{color:var(--text-sec-light);font-size:.82rem}
.footer-bottom .footer-links{display:flex;gap:24px}
.footer-bottom .footer-links a{color:var(--text-sec-light);font-size:.82rem}
.footer-bottom .footer-links a:hover{color:var(--accent-gold)}
/* back to top */
.back-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;border-radius:12px;background:var(--primary-dark);border:1px solid var(--border-gold-strong);color:var(--accent-gold);display:flex;align-items:center;justify-content:center;font-size:1.2rem;opacity:0;visibility:hidden;transition:all var(--transition);z-index:900}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--neutral-card);transform:translateY(-4px)}
/* responsive */
@media(max-width:1024px){
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .solution-grid{grid-template-columns:1fr;gap:48px}
  .testi-layout{grid-template-columns:1fr;gap:48px}
  .results-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media(max-width:768px){
  .main-nav{display:none}
  .header-cta .btn,.header-link{display:none}
  .nav-toggle{display:flex}
  .section-pad{padding:64px 0}
  .hero{padding-top:120px}
  .hero-stats{flex-direction:column;gap:20px}
  .hero-stat{padding:0;border-left:none;border-top:1px solid var(--border-gold);padding-top:16px}
  .pain-grid{grid-template-columns:1fr}
  .result-cards{grid-template-columns:1fr}
  .testi-grid{grid-template-columns:1fr}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .section-head h2{font-size:1.8rem}
  .hero-actions .btn{width:100%;justify-content:center}
}
@media(max-width:520px){
  .results-grid{grid-template-columns:1fr}
  .solution-item{flex-direction:column;gap:12px}
  .container{padding:0 16px}
}