/* roulang page: index */
:root{
  --primary:#5C6164;
  --accent:#A67C52;
  --accent-hover:#8F6B43;
  --bg:#F6F3EE;
  --bg-alt:#EDEAE4;
  --dark:#2B2E30;
  --text:#222527;
  --text-secondary:#6B7074;
  --text-muted:#9A9FA3;
  --border:rgba(43,46,48,.10);
  --border-dark:rgba(43,46,48,.18);
  --cyan:#7A8B93;
  --radius:10px;
  --radius-btn:6px;
  --radius-pill:999px;
  --shadow-card:0 2px 12px rgba(0,0,0,.04);
  --shadow-hover:0 8px 30px rgba(0,0,0,.08);
  --shadow-nav:0 4px 20px rgba(0,0,0,.06);
  --font-serif:Georgia,"Noto Serif SC","Source Han Serif SC","STSong","SimSun",serif;
  --font-sans:-apple-system,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --container:1200px;
  --spacing-section:100px;
  --spacing-section-mobile:56px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.8;font-size:15px;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:color .2s ease}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea{font-family:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
section{position:relative}
h1,h2,h3{font-family:var(--font-serif);font-weight:700;line-height:1.3}
h2{font-size:28px;margin-bottom:12px}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px;padding:0 16px}
.section-head h2{font-size:30px}
.section-head p{color:var(--text-secondary);font-size:15px;margin-top:8px;line-height:1.7}
.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 24px;border-radius:var(--radius-btn);font-size:14px;font-weight:600;transition:all .25s ease;cursor:pointer;border:none;line-height:1}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 6px 16px rgba(166,124,82,.3)}
.btn-accent:active{transform:translateY(0);box-shadow:0 2px 8px rgba(166,124,82,.2)}
.btn-lg{height:48px;padding:0 32px;font-size:15px}
.btn-outline{background:transparent;border:1px solid var(--border-dark);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(166,124,82,.06);transform:translateY(-2px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text);font-weight:500;background:none;border:none;padding:0;cursor:pointer;transition:color .2s ease}
.btn-text:hover{color:var(--accent)}
.btn-text .arrow{transition:transform .2s ease;display:inline-block}
.btn-text:hover .arrow{transform:translateX(4px)}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Header / Nav ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(246,243,238,.85);backdrop-filter:blur(0);transition:background .2s ease,backdrop-filter .2s ease,box-shadow .2s ease,border-bottom .2s ease;border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(246,243,238,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-nav);border-bottom:1px solid var(--border)}
.nav-wrap{display:flex;align-items:center;height:68px;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:18px;font-weight:700;color:var(--text);white-space:nowrap}
.brand svg{width:26px;height:26px;flex-shrink:0}
.brand:hover{color:var(--accent)}
.brand .brand-sub{display:block;font-size:10px;font-family:var(--font-sans);font-weight:400;color:var(--text-muted);letter-spacing:.12em;text-transform:uppercase;margin-top:-2px}
.main-nav{display:flex;align-items:center;gap:24px;margin-left:auto}
.main-nav a{position:relative;font-size:14px;font-weight:500;color:var(--text-secondary);padding:8px 0;transition:color .2s ease}
.main-nav a:hover{color:var(--text)}
.main-nav a.active{color:var(--text)}
.main-nav a.active::after{content:'';position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--accent);border-radius:2px}
.nav-actions{display:flex;align-items:center;gap:16px}
.lang-switch{display:flex;align-items:center;background:var(--bg-alt);border-radius:var(--radius-pill);height:34px;padding:3px;gap:2px}
.lang-switch button{height:28px;padding:0 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:500;color:var(--text-secondary);background:transparent;transition:all .2s ease}
.lang-switch button.active{background:#fff;color:var(--text);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);transition:all .3s ease;border-radius:2px}
.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)}

/* ===== Hero ===== */
.hero{min-height:90vh;min-height:640px;display:flex;align-items:center;justify-content:center;padding:140px 0 80px;position:relative;background:url('/assets/images/backpic/back-1.jpg') center center/cover no-repeat;text-align:center;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(to bottom,rgba(34,37,39,.62),rgba(34,37,39,.48) 45%,rgba(34,37,39,.72));z-index:1}
.hero-content{position:relative;z-index:2;max-width:860px;margin:0 auto;padding:0 24px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.75);font-family:var(--font-sans);border:1px solid rgba(255,255,255,.25);border-radius:var(--radius-pill);padding:6px 18px;margin-bottom:28px;background:rgba(255,255,255,.08);backdrop-filter:blur(4px)}
.hero-tag::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block}
.hero h1{font-size:44px;font-weight:700;color:#fff;line-height:1.25;margin-bottom:20px;text-shadow:0 2px 20px rgba(0,0,0,.25)}
.hero-subtitle{font-size:17px;color:rgba(255,255,255,.85);margin-bottom:36px;line-height:1.8;max-width:620px;margin-left:auto;margin-right:auto}
.hero-search{max-width:560px;margin:0 auto 24px;display:flex;background:rgba(255,255,255,.96);border-radius:var(--radius-pill);padding:6px;box-shadow:0 10px 40px rgba(0,0,0,.15)}
.hero-search input{flex:1;border:none;outline:none;background:transparent;padding:10px 20px;font-size:15px;color:var(--text);border-radius:var(--radius-pill)}
.hero-search input::placeholder{color:var(--text-muted)}
.hero-search button{background:var(--accent);color:#fff;border:none;border-radius:var(--radius-pill);padding:10px 28px;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s ease,transform .2s ease;white-space:nowrap}
.hero-search button:hover{background:var(--accent-hover);transform:scale(1.03)}
.hero-cats{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.7)}
.hero-cats span{margin-right:4px}
.hero-cats a{color:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-pill);padding:4px 14px;font-size:13px;transition:all .2s ease;background:rgba(255,255,255,.06)}
.hero-cats a:hover{color:#fff;background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.4)}
.hero-actions{display:flex;align-items:center;justify-content:center;gap:28px;margin-top:36px}
.hero-actions .btn-text{color:rgba(255,255,255,.85)}
.hero-actions .btn-text:hover{color:#fff}
.hero-scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:6px;color:rgba(255,255,255,.6);font-size:12px;letter-spacing:.15em;animation:scrollPulse 2.5s ease-in-out infinite}
.hero-scroll .line{width:1px;height:36px;background:linear-gradient(to bottom,rgba(255,255,255,.6),transparent)}
.hero-scroll .arrow-down{font-size:14px}
@keyframes scrollPulse{0%,100%{opacity:.8;transform:translateX(-50%)}50%{opacity:.3;transform:translateX(-50%) translateY(4px)}}

/* ===== Pain Points ===== */
.pain-points{background:var(--bg);padding:var(--spacing-section) 0;border-bottom:1px solid var(--border)}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.pain-item{text-align:center;padding:24px 16px;position:relative}
.pain-item:not(:last-child)::after{content:'';position:absolute;right:-16px;top:50%;transform:translateY(-50%);width:1px;height:64px;background:var(--border-dark)}
.pain-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;margin:0 auto 18px;border-radius:50%;background:var(--bg-alt);color:var(--accent)}
.pain-icon svg{width:26px;height:26px}
.pain-item p{font-size:14px;font-weight:500;color:var(--text);line-height:1.6}

/* ===== Boards ===== */
.boards{padding:var(--spacing-section) 0;background:var(--bg)}
.boards-wrapper{max-width:1200px;margin:0 auto;padding:0 24px}
.board-transition{display:flex;align-items:center;gap:20px;max-width:640px;margin:0 auto 56px;color:var(--text-muted);font-size:14px}
.board-transition::before,.board-transition::after{content:'';flex:1;height:1px;background:var(--border-dark)}
.board-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.board-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;display:flex;flex-direction:column}
.board-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.board-img{position:relative;overflow:hidden;aspect-ratio:16/10}
.board-img img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.board-card:hover .board-img img{transform:scale(1.03)}
.board-body{padding:24px;display:flex;flex-direction:column;flex:1}
.board-body h3{font-size:20px;font-weight:600;margin-bottom:8px;font-family:var(--font-serif)}
.board-body p{font-size:14px;color:var(--text-secondary);line-height:1.6;flex:1;margin-bottom:16px}
.board-meta{font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:6px}
.board-meta::before{content:'';width:4px;height:4px;border-radius:50%;background:var(--accent);display:inline-block}

/* ===== Results ===== */
.results{padding:var(--spacing-section) 0;background:var(--bg-alt)}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-bottom:72px;position:relative}
.stat-item{text-align:center;padding:16px 0;position:relative}
.stat-item::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:40px;height:1px;background:var(--accent)}
.stat-num{display:block;font-family:var(--font-serif);font-size:52px;font-weight:700;color:var(--text);line-height:1;margin-bottom:10px;letter-spacing:.02em}
.stat-item span:last-child{font-size:14px;color:var(--text-secondary)}
.result-cols{display:grid;grid-template-columns:65% 1fr;gap:48px;max-width:1200px;margin:0 auto;padding:0 24px}
.hot-list h3,.editor-pick h3{font-size:20px;font-weight:600;margin-bottom:20px;font-family:var(--font-serif);position:relative;padding-bottom:10px}
.hot-list h3::after,.editor-pick h3::after{content:'';position:absolute;left:0;bottom:0;width:32px;height:2px;background:var(--accent)}
.hot-item{display:flex;align-items:center;gap:16px;padding:18px 4px;border-bottom:1px solid var(--border);transition:background .2s ease;border-radius:4px}
.hot-item:hover{background:rgba(255,255,255,.7)}
.hot-item:last-child{border-bottom:none}
.hot-item .hot-num{font-family:var(--font-serif);font-size:15px;color:var(--text-muted);font-weight:600;min-width:24px}
.hot-item .hot-title{flex:1;font-size:15px;font-weight:500;color:var(--text);line-height:1.5;transition:color .2s ease}
.hot-item .hot-title:hover{color:var(--accent)}
.badge{display:inline-block;background:var(--bg-alt);color:var(--text-secondary);font-size:12px;font-weight:500;padding:2px 10px;border-radius:var(--radius-pill);white-space:nowrap;transition:background .2s ease,color .2s ease}
.badge-hot{background:rgba(166,124,82,.1);color:var(--accent)}
.hot-meta{font-size:12px;color:var(--text-muted);white-space:nowrap}
.editor-pick-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease}
.editor-pick-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.editor-pick-card .ep-img{aspect-ratio:16/9;overflow:hidden}
.editor-pick-card .ep-img img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.editor-pick-card:hover .ep-img img{transform:scale(1.03)}
.ep-body{padding:20px}
.ep-body h4{font-size:16px;font-weight:600;margin-bottom:8px;font-family:var(--font-serif);line-height:1.5}
.ep-body p{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:14px}
.ep-link{font-size:13px;color:var(--accent);font-weight:500;display:inline-flex;align-items:center;gap:4px;transition:gap .2s ease}
.ep-link:hover{gap:8px}

/* ===== Assurance ===== */
.assurance{background:var(--bg);padding:64px 0;border-bottom:1px solid var(--border)}
.assurance-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;max-width:1200px;margin:0 auto;padding:0 24px}
.assurance-item{display:flex;align-items:flex-start;gap:14px}
.assurance-icon{flex-shrink:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--bg-alt);border-radius:8px;color:var(--accent)}
.assurance-icon svg{width:22px;height:22px}
.assurance-item h4{font-size:14px;font-weight:600;margin-bottom:2px}
.assurance-item p{font-size:13px;color:var(--text-secondary);line-height:1.5}

/* ===== Testimonials ===== */
.testimonials{padding:var(--spacing-section) 0;background:var(--bg)}
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1200px;margin:0 auto;padding:0 24px}
.testimonial-card{background:transparent;border:1px solid var(--border-dark);border-radius:var(--radius);padding:36px 28px 28px;position:relative;transition:border-color .25s ease,background .25s ease}
.testimonial-card:hover{border-color:rgba(43,46,48,.3);background:rgba(255,255,255,.5)}
.quote-mark{position:absolute;top:10px;left:22px;font-family:var(--font-serif);font-size:64px;color:var(--accent);opacity:.18}
.testimonial-card .stars{display:flex;gap:2px;margin-bottom:14px;font-size:14px;color:var(--accent)}
.testimonial-card blockquote{font-size:14px;color:var(--text);line-height:1.75;margin-bottom:20px;position:relative;z-index:1}
.testimonial-author{display:flex;align-items:center;gap:12px;border-top:1px solid var(--border);padding-top:16px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:600;color:var(--accent)}
.testimonial-author strong{display:block;font-size:14px;font-weight:600}
.testimonial-author span{font-size:12px;color:var(--text-muted)}

/* ===== FAQ ===== */
.faq{padding:var(--spacing-section) 0;background:var(--bg)}
.faq-wrap{max-width:760px;margin:0 auto;padding:0 24px}
.faq-list{border-top:1px solid var(--border-dark)}
.faq-item{border-bottom:1px solid var(--border-dark)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:18px 8px;font-size:16px;font-weight:500;color:var(--text);text-align:left;background:none;border:none;cursor:pointer;transition:color .2s ease;gap:16px}
.faq-question:hover{color:var(--accent)}
.faq-icon{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--bg-alt);color:var(--text-secondary);font-size:16px;transition:transform .3s ease,background .3s ease,color .3s ease}
.faq-item.active .faq-icon{transform:rotate(45deg);background:var(--accent);color:#fff}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 8px}
.faq-answer-inner{padding:0 0 20px;font-size:14px;color:var(--text-secondary);line-height:1.8}

/* ===== CTA Banner ===== */
.cta-banner{background:var(--dark);position:relative;padding:80px 0;text-align:center;overflow:hidden}
.cta-banner::before{content:'';position:absolute;top:0;right:0;width:100%;height:100%;background:url('/assets/images/backpic/back-2.jpg') center center/cover no-repeat;opacity:.14}
.cta-banner::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,rgba(166,124,82,.08),transparent 70%)}
.cta-content{position:relative;z-index:2;max-width:720px;margin:0 auto;padding:0 24px}
.cta-banner h2{font-size:30px;color:#fff;margin-bottom:14px;font-family:var(--font-serif)}
.cta-banner p{font-size:15px;color:rgba(255,255,255,.75);margin-bottom:32px;line-height:1.7}

/* ===== Footer ===== */
.site-footer{background:#1E2123;color:rgba(255,255,255,.65);padding:64px 0 0;font-size:13px;position:relative}
.site-footer::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(to right,transparent,rgba(166,124,82,.4),transparent)}
.footer-brand-style{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:17px;font-weight:700;color:#fff;margin-bottom:10px}
.footer-brand-style svg{width:22px;height:22px;color:var(--accent)}
.footer-desc{font-size:13px;color:rgba(255,255,255,.5);line-height:1.7;max-width:280px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-links h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;font-family:var(--font-sans)}
.footer-links a{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.55);font-size:13px;padding:5px 0;transition:color .2s ease}
.footer-links a:hover{color:var(--accent)}
.footer-links a svg{width:14px;height:14px;opacity:.5;transition:opacity .2s ease}
.footer-links a:hover svg{opacity:1}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:20px 0;color:rgba(255,255,255,.35);font-size:12px}
.footer-bottom a{color:rgba(255,255,255,.4)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== Mobile Drawer ===== */
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg);z-index:999;transform:translateX(100%);transition:transform .25s ease;display:flex;flex-direction:column;padding:80px 32px 32px;overflow-y:auto}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a{font-size:28px;font-family:var(--font-serif);font-weight:600;color:var(--text);padding:14px 0;border-bottom:1px solid var(--border)}
.mobile-drawer a:hover{color:var(--accent)}
.mobile-drawer .drawer-lang{margin-top:auto;display:flex;gap:8px;padding-top:24px}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .board-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .result-cols{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:36px}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .nav-actions .lang-switch{display:none}
  .assurance-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .pain-item:not(:last-child)::after{display:none}
}
@media(max-width:768px){
  :root{--spacing-section:56px}
  .container{padding:0 16px}
  .office{display:none}
  .section-head h2{font-size:24px}
  .section-head p{font-size:14px}
  .hero{min-height:640px;padding:120px 0 64px}
  .hero h1{font-size:30px}
  .hero-subtitle{font-size:15px}
  .hero-search{flex-direction:column;background:transparent;box-shadow:none;gap:10px;padding:0}
  .hero-search input{width:100%;background:#fff;border-radius:var(--radius-pill);padding:14px 20px}
  .hero-search button{width:100%;padding:14px 28px}
  .hero-cats{gap:8px}
  .testimonial-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr;gap:24px}
  .stat-num{font-size:40px}
  .result-cols{padding:0 16px}
  .board-grid{grid-template-columns:1fr}
  .board-img{aspect-ratio:4/3}
  .footer-top{grid-template-columns:1fr;gap:32px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;justify-content:center;text-align:center;padding:16px 0}
  .boards-wrapper{padding:0 16px}
  .assurance-grid{padding:0 16px}
  .testimonial-grid{padding:0 16px}
  .faq-wrap{padding:0 16px}
  .cta-content{padding:0 16px}
  .cta-banner h2{font-size:24px}
  .pain-grid{gap:16px}
  .pain-item{padding:16px 8px}
  .result-cols{grid-template-columns:1fr}
}
@media(max-width:520px){
  .hero h1{font-size:25px}
  .hero-scroll{display:none}
  .pain-grid{grid-template-columns:1fr 1fr}
  .pain-item p{font-size:13px}
  .assurance-grid{grid-template-columns:1fr}
  .hot-item{flex-wrap:wrap;gap:8px}
  .hot-item .badge{order:3}
  .hot-meta{margin-left:auto}
  .stat-num{font-size:36px}
}