/* roulang page: index */
:root {
    --bg-primary:#050A18; --bg-secondary:#0A1222; --glass-bg:rgba(13,23,45,.62);
    --glass-border:rgba(255,255,255,.08); --primary:#2E6BFF; --primary-hover:#5291FF;
    --primary-active:#1E54D6; --accent:#22D3EE; --warm:#FFB224; --success:#2DD4A0;
    --danger:#FB7185; --text-primary:#E7ECF5; --text-secondary:#93A0BB; --text-muted:#5D6B87;
    --radius-lg:16px; --radius-md:10px; --radius-sm:8px; --radius-pill:999px;
    --shadow-ambient:0 12px 40px rgba(0,0,0,.35); --shadow-glow:0 0 24px rgba(46,107,255,.45);
    --container-max:1200px; --nav-height:64px; --space-section:88px; --space-section-md:64px; --space-section-sm:48px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg-primary);color:var(--text-primary);font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;outline:none}
.container{max-width:var(--container-max);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0;position:relative}
.section-heading{max-width:680px;margin-bottom:44px}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--accent);background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.18);padding:4px 14px;border-radius:var(--radius-pill);margin-bottom:14px}
.section-heading h2{font-size:30px;font-weight:800;letter-spacing:-.02em;line-height:1.3;margin-bottom:12px}
.section-heading p{font-size:15px;color:var(--text-secondary);line-height:1.7}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;padding:12px 26px;border-radius:var(--radius-md);cursor:pointer;transition:all .25s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),#1E54D6);color:#fff;box-shadow:var(--shadow-glow)}
.btn-primary:hover{background:linear-gradient(135deg,var(--primary-hover),#2563EB);box-shadow:0 0 32px rgba(46,107,255,.6);transform:translateY(-2px)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:var(--text-primary)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.25)}
.btn-warm{background:linear-gradient(135deg,var(--warm),#E89520);color:#0A1222;box-shadow:0 0 20px rgba(255,178,36,.25)}
.btn-warm:hover{box-shadow:0 0 32px rgba(255,178,36,.4);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:3px 10px;border-radius:var(--radius-pill);line-height:1.5}
.badge-primary{background:rgba(46,107,255,.15);color:#7BA5FF;border:1px solid rgba(46,107,255,.25)}
.badge-accent{background:rgba(34,211,238,.1);color:var(--accent);border:1px solid rgba(34,211,238,.2)}
.badge-warm{background:rgba(255,178,36,.12);color:var(--warm);border:1px solid rgba(255,178,36,.25)}
/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-height);background:rgba(5,10,24,.78);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{max-width:var(--container-max);height:100%;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.header-left{display:flex;align-items:center;gap:32px}
.logo{font-size:18px;font-weight:800;letter-spacing:-.01em;display:flex;align-items:center;gap:8px}
.logo-icon{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:15px;color:#fff;box-shadow:0 0 14px rgba(46,107,255,.35)}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{padding:8px 16px;font-size:14px;font-weight:500;color:var(--text-secondary);border-radius:8px;transition:all .2s ease}
.nav-link:hover{color:var(--text-primary);background:rgba(255,255,255,.05)}
.nav-link.active{color:#fff;background:rgba(46,107,255,.15);font-weight:600}
.header-right{display:flex;align-items:center;gap:12px}
.search-toggle{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all .2s;cursor:pointer}
.search-toggle:hover{color:#fff;background:rgba(255,255,255,.06)}
.menu-toggle{display:none;width:40px;height:40px;border-radius:10px;align-items:center;justify-content:center;cursor:pointer;color:var(--text-primary);background:rgba(255,255,255,.05)}
.menu-toggle i{font-size:18px}
/* Hero */
.hero{position:relative;min-height:calc(100vh - var(--nav-height));display:flex;align-items:center;padding-top:var(--nav-height);overflow:hidden;background:var(--bg-primary)}
.hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(34,211,238,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.035) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}
.hero-glow-1{position:absolute;top:-120px;right:-80px;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.12),transparent 65%);pointer-events:none}
.hero-glow-2{position:absolute;bottom:-100px;left:20%;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(46,107,255,.1),transparent 60%);pointer-events:none}
.hero-container{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:48px}
.hero-content{padding:0 8px}
.hero-badge-row{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.hero-title{font-size:42px;font-weight:800;line-height:1.22;letter-spacing:-.02em;margin-bottom:18px}
.hero-title .highlight{color:var(--accent)}
.hero-subtitle{font-size:16px;line-height:1.8;color:var(--text-secondary);margin-bottom:32px;max-width:520px}
.hero-search{display:flex;gap:10px;margin-bottom:20px;max-width:520px}
.hero-search-input{flex:1;height:52px;border-radius:var(--radius-md);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);padding:0 20px;font-size:15px;color:var(--text-primary);transition:all .25s}
.hero-search-input::placeholder{color:var(--text-muted)}
.hero-search-input:focus{border-color:rgba(46,107,255,.5);box-shadow:0 0 0 3px rgba(46,107,255,.15);background:rgba(255,255,255,.08)}
.hero-search-btn{width:56px;height:52px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--primary),#1E54D6);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-glow);transition:all .25s;font-size:18px}
.hero-search-btn:hover{box-shadow:0 0 30px rgba(46,107,255,.55);transform:scale(1.03)}
.hero-tags{display:flex;align-items:center;flex-wrap:wrap;gap:8px;max-width:520px}
.hero-tags-label{font-size:13px;color:var(--text-muted);margin-right:4px}
.hero-tag{padding:5px 12px;border-radius:var(--radius-pill);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);font-size:12px;color:var(--text-secondary);transition:all .2s;cursor:pointer}
.hero-tag:hover{color:var(--accent);border-color:rgba(34,211,238,.3);background:rgba(34,211,238,.06)}
.hero-visual{position:relative}
.hero-image-frame{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow-ambient);background:var(--bg-secondary)}
.hero-image-frame img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-image-overlay{position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(5,10,24,.6)),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M0 20h40M20 0v40' stroke='rgba(34,211,238,0.08)' stroke-width='1'/%3E%3C/svg%3E")}
.hero-image-badge{position:absolute;left:16px;bottom:16px;display:flex;gap:8px}
.hero-image-badge span{padding:5px 12px;border-radius:var(--radius-pill);font-size:12px;font-weight:600;background:rgba(5,10,24,.7);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);color:var(--text-primary)}
.hero-trust{display:flex;gap:18px;margin-top:28px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary)}
.trust-item i{color:var(--success);font-size:14px}
/* Stats */
.stats-section{background:var(--bg-secondary);position:relative;overflow:hidden}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px}
.stat-card{position:relative;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:30px 26px;backdrop-filter:blur(12px);box-shadow:var(--shadow-ambient);overflow:hidden;transition:transform .25s ease,border-color .25s ease}
.stat-card::after{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.12),transparent)}
.stat-card:hover{transform:translateY(-3px);border-color:rgba(46,107,255,.35)}
.stat-number{font-family:'Space Grotesk','Inter',ui-sans-serif,sans-serif;font-variant-numeric:tabular-nums;font-size:48px;font-weight:700;color:var(--accent);text-shadow:0 0 16px rgba(34,211,238,.3);line-height:1.1}
.stat-unit{font-size:16px;color:var(--text-secondary);margin-left:4px;font-weight:400}
.stat-label{font-size:14px;font-weight:600;color:var(--text-primary);margin-top:12px}
.stat-desc{font-size:13px;color:var(--text-secondary);margin-top:6px;line-height:1.55}
/* Services */
.services-section{position:relative}
.services-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.service-card{position:relative;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:32px 30px;backdrop-filter:blur(12px);box-shadow:var(--shadow-ambient);transition:transform .25s,border-color .25s;overflow:hidden}
.service-card:hover{transform:translateY(-3px);border-color:rgba(46,107,255,.35)}
.service-card.highlight{border-color:transparent;background:linear-gradient(var(--glass-bg),var(--glass-bg)) padding-box,linear-gradient(135deg,rgba(46,107,255,.6),rgba(34,211,238,.3)) border-box;border:1px solid transparent}
.service-card .card-glow{position:absolute;top:-40px;right:-30px;width:160px;height:160px;border-radius:50%;background:radial-gradient(circle,rgba(46,107,255,.18),transparent 70%);pointer-events:none}
.service-card-main{display:flex;gap:18px;align-items:flex-start}
.service-icon{flex-shrink:0;width:52px;height:52px;border-radius:14px;background:rgba(46,107,255,.12);border:1px solid rgba(46,107,255,.25);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:20px;transition:all .3s}
.service-card:hover .service-icon{color:var(--accent);background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.3)}
.service-card-title{font-size:18px;font-weight:600;margin-bottom:8px;color:var(--text-primary)}
.service-card-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px}
.service-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.service-list li{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--text-secondary)}
.service-list li i{color:var(--success);font-size:12px;margin-top:4px}
.service-card-image{margin-top:20px;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.service-card-image img{width:100%;aspect-ratio:16/8;object-fit:cover}
/* Compare */
.compare-section{background:var(--bg-secondary);position:relative;overflow:hidden}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:32px 30px;backdrop-filter:blur(12px);transition:transform .25s;position:relative}
.compare-card:hover{transform:translateY(-3px)}
.compare-card.recommended{border-color:transparent;background:linear-gradient(var(--glass-bg),var(--glass-bg)) padding-box,linear-gradient(135deg,rgba(46,107,255,.5),rgba(34,211,238,.25)) border-box;box-shadow:0 0 32px rgba(46,107,255,.15)}
.compare-card-old{opacity:.72}
.compare-tag{display:inline-block;font-size:14px;font-weight:700;margin-bottom:18px;padding:4px 14px;border-radius:var(--radius-pill)}
.compare-tag-old{background:rgba(251,113,133,.1);color:var(--danger);border:1px solid rgba(251,113,133,.2)}
.compare-tag-new{background:rgba(45,212,160,.1);color:var(--success);border:1px solid rgba(45,212,160,.2)}
.compare-card-title{font-size:19px;font-weight:700;margin-bottom:22px}
.compare-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.compare-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-secondary);line-height:1.65}
.compare-list li i{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;margin-top:2px;flex-shrink:0}
.compare-list li .fa-xmark{background:rgba(251,113,133,.12);color:var(--danger)}
.compare-list li .fa-check{background:rgba(45,212,160,.12);color:var(--success)}
/* News */
.news-section{position:relative}
.news-layout{display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-card{display:flex;align-items:center;gap:20px;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:20px 24px;transition:all .25s;position:relative;overflow:hidden}
.news-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--primary);opacity:0;transition:opacity .25s}
.news-card:hover{background:rgba(255,255,255,.04);border-color:rgba(46,107,255,.3)}
.news-card:hover::before{opacity:1}
.news-index{font-family:'Space Grotesk','Inter',ui-sans-serif,sans-serif;font-size:18px;font-weight:700;color:var(--text-muted);min-width:36px;text-align:center}
.news-card-body{flex:1;min-width:0}
.news-card-title{font-size:16px;font-weight:600;margin-bottom:4px;line-height:1.4}
.news-card-title a{transition:color .2s}
.news-card-title a:hover{color:var(--accent)}
.news-card-excerpt{font-size:13px;color:var(--text-secondary);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-meta{display:flex;align-items:center;gap:14px;flex-shrink:0;flex-wrap:wrap;justify-content:flex-end}
.news-card-meta time{font-size:12px;color:var(--text-muted);font-family:'Space Grotesk','Inter',sans-serif}
.read-more{font-size:13px;color:var(--primary);font-weight:600;white-space:nowrap;transition:color .2s}
.read-more:hover{color:var(--accent)}
.news-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 30px;background:rgba(255,255,255,.02);border:1px dashed rgba(255,255,255,.15);border-radius:var(--radius-lg);text-align:center}
.news-empty i{font-size:36px;color:var(--text-muted);margin-bottom:12px}
.news-empty p{font-size:14px;color:var(--text-secondary)}
.news-sidebar{display:flex;flex-direction:column;gap:16px}
.sidebar-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:22px 20px}
.sidebar-card h3{font-size:15px;font-weight:700;margin-bottom:14px;color:var(--text-primary)}
.sidebar-tags{display:flex;flex-wrap:wrap;gap:8px}
.sidebar-tag{font-size:12px;padding:5px 12px;border-radius:var(--radius-pill);background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);color:var(--text-secondary);cursor:pointer;transition:all .2s}
.sidebar-tag:hover{color:var(--accent);border-color:rgba(34,211,238,.25);background:rgba(34,211,238,.05)}
/* Topics */
.topics-section{background:var(--bg-secondary)}
.topics-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-card{display:flex;align-items:center;gap:14px;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:18px 20px;transition:all .25s;cursor:pointer}
.topic-card:hover{transform:translateY(-3px);border-color:rgba(46,107,255,.4);background:rgba(255,255,255,.03)}
.topic-icon{width:44px;height:44px;border-radius:12px;background:rgba(46,107,255,.1);border:1px solid rgba(46,107,255,.2);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:17px;flex-shrink:0}
.topic-title{font-size:15px;font-weight:600;line-height:1.3}
.topic-sub{font-size:12px;color:var(--text-secondary);margin-top:3px}
/* Testimonials */
.testimonials-section{position:relative}
.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:28px 26px;backdrop-filter:blur(12px);transition:transform .25s}
.testimonial-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.25)}
.testimonial-stars{color:var(--warm);font-size:14px;margin-bottom:14px;letter-spacing:2px}
.testimonial-text{font-size:14px;color:var(--text-secondary);line-height:1.75;margin-bottom:18px}
.testimonial-user{display:flex;align-items:center;gap:10px}
.testimonial-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:14px;color:#fff;flex-shrink:0}
.testimonial-name{font-size:14px;font-weight:600}
.testimonial-role{font-size:12px;color:var(--text-muted)}
/* FAQ */
.faq-section{background:var(--bg-secondary)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;transition:border-color .25s}
.faq-item.active{border-color:rgba(46,107,255,.35)}
.faq-question{display:flex;align-items:center;gap:16px;padding:22px 26px;cursor:pointer;user-select:none}
.faq-icon{width:30px;height:30px;border-radius:50%;background:rgba(46,107,255,.1);border:1px solid rgba(46,107,255,.2);display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--primary);flex-shrink:0;transition:all .3s}
.faq-item.active .faq-icon{transform:rotate(45deg);background:rgba(46,107,255,.2);color:#fff}
.faq-question-text{font-size:16px;font-weight:600;flex:1;color:var(--text-primary)}
.faq-arrow{color:var(--text-muted);font-size:14px;transition:transform .3s}
.faq-item.active .faq-arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 26px 22px 72px;font-size:14px;line-height:1.75;color:var(--text-secondary)}
/* Contact */
.contact-section{position:relative}
.contact-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-ambient);backdrop-filter:blur(12px);overflow:hidden;position:relative}
.contact-wrap::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent)}
.contact-info h3{font-size:22px;font-weight:700;margin-bottom:10px}
.contact-info p{font-size:14px;color:var(--text-secondary);margin-bottom:24px;line-height:1.7}
.contact-points{display:flex;flex-direction:column;gap:14px;margin-bottom:28px}
.contact-point{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-secondary)}
.contact-point i{color:var(--accent);font-size:14px;margin-top:4px}
.contact-line{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--text-secondary);padding-top:16px;border-top:1px solid rgba(255,255,255,.06)}
.contact-line i{color:var(--primary);font-size:16px}
.contact-form{display:flex;flex-direction:column;gap:18px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-primary);margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;border-radius:var(--radius-md);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);padding:12px 16px;font-size:14px;color:var(--text-primary);transition:all .25s}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-muted)}
.form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235D6B87' stroke-width='2' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;cursor:pointer}
.form-group select option{background:var(--bg-secondary);color:var(--text-primary)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(46,107,255,.15);background:rgba(255,255,255,.07)}
.form-group textarea{resize:vertical;min-height:90px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-submit{width:100%;height:50px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--warm),#E89520);color:#0A1222;font-size:16px;font-weight:700;cursor:pointer;transition:all .25s;border:none;box-shadow:0 4px 20px rgba(255,178,36,.15)}
.form-submit:hover{box-shadow:0 4px 32px rgba(255,178,36,.35);transform:translateY(-2px)}
.form-submit:active{transform:scale(.98)}
.form-privacy{font-size:12px;color:var(--text-muted);text-align:center;margin-top:4px}
.form-success{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:48px 30px;text-align:center}
.form-success i{font-size:48px;color:var(--success)}
.form-success p{font-size:16px;color:var(--text-primary);font-weight:600}
/* Footer */
.site-footer{background:#030711;border-top:1px solid rgba(255,255,255,.05);padding:56px 0 0;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.04)}
.footer-brand .logo{margin-bottom:14px;font-size:20px}
.footer-brand-desc{font-size:13px;color:var(--text-muted);line-height:1.7;max-width:320px}
.footer-col-title{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text-primary)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-secondary);transition:color .2s}
.footer-links a:hover{color:var(--accent)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--text-secondary)}
.footer-contact span{display:flex;align-items:center;gap:10px}
.footer-contact i{color:var(--text-muted);width:18px;text-align:center}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:18px 0 30px;font-size:13px;color:var(--text-muted)}
/* Focus */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* Responsive */
@media (max-width:1024px){
    .hero-container{grid-template-columns:1fr 1fr;gap:32px}
    .hero-title{font-size:34px}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .services-grid{grid-template-columns:repeat(2,1fr)}
    .service-card.highlight{grid-column:span 2}
    .topics-grid{grid-template-columns:repeat(2,1fr)}
    .testimonials-grid{grid-template-columns:repeat(2,1fr)}
    .testimonials-grid .testimonial-card:last-child{grid-column:span 2}
    .news-layout{grid-template-columns:1fr}

}
@media (max-width:768px){
    :root{--space-section:64px}
    .menu-toggle{display:flex}
    .main-nav{position:fixed;top:var(--nav-height);left:0;right:0;background:rgba(5,10,24,.95);backdrop-filter:blur(20px);flex-direction:column;padding:16px 24px;gap:8px;display:none;border-bottom:1px solid rgba(255,255,255,.06)}
    .main-nav.open{display:flex}
    .nav-link{padding:12px 16px;width:100%;text-align:left}
    .hero-container{grid-template-columns:1fr;padding-top:32px}
    .hero-title{font-size:29px}
    .hero-visual{margin-top:0}
    .hero{min-height:auto;padding-top:calc(var(--nav-height) + 30px)}
    .compare-grid{grid-template-columns:1fr}
    .news-layout{grid-template-columns:1fr}
    .news-card{flex-direction:column;align-items:flex-start;gap:12px}
    .news-card-meta{justify-content:flex-start}
    .contact-wrap{grid-template-columns:1fr;padding:30px 24px}
    .form-row{grid-template-columns:1fr}
    .footer-top{grid-template-columns:1fr;gap:28px}
    .testimonials-grid{grid-template-columns:1fr}
    .testimonials-grid .testimonial-card:last-child{grid-column:auto}
}
@media (max-width:576px){
    .container{padding:0 18px}
    .stats-grid{grid-template-columns:1fr 1fr;gap:14px}
    .stat-card{padding:20px 16px}
    .stat-number{font-size:30px}
    .stat-label{font-size:13px}
    .services-grid{grid-template-columns:1fr}
    .service-card.highlight{grid-column:auto}
    .topics-grid{grid-template-columns:1fr}
    .service-card{padding:24px 20px}
    .compare-card{padding:24px 20px}
    .hero-search{flex-direction:column}
    .hero-search-btn{width:100%}
    .faq-question{padding:18px 18px}
    .faq-answer-inner{padding:0 18px 18px 52px}
    .header-inner{padding:0 16px}
    .logo{font-size:15px}
    .btn-primary{padding:10px 16px;font-size:13px}
    .contact-wrap{padding:24px 18px}
}
@media (prefers-reduced-motion:reduce){
    *{transition:none!important;animation:none!important;scroll-behavior:auto}
}

/* roulang page: article */
:root {
    --bg-primary: #050A18;
    --bg-secondary: #0A1222;
    --glass-bg: rgba(13,23,45,.62);
    --glass-border: rgba(255,255,255,.08);
    --primary: #2E6BFF;
    --primary-hover: #5291FF;
    --primary-active: #1E54D6;
    --accent: #22D3EE;
    --warm: #FFB224;
    --success: #2DD4A0;
    --danger: #FB7185;
    --text-primary: #E7ECF5;
    --text-secondary: #93A0BB;
    --text-muted: #5D6B87;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --radius-pill: 999px;
    --shadow-ambient: 0 12px 40px rgba(0,0,0,.35);
    --shadow-glow: 0 0 24px rgba(46,107,255,.45);
    --container-max: 1200px;
    --nav-height: 64px;
    --space-section: 88px;
    --space-section-md: 64px;
    --space-section-sm: 48px;
}
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    background-color: var(--bg-primary);
    background-image: linear-gradient(rgba(34,211,238,.028) 1px, transparent 1px), linear-gradient(90deg, rgba(34,211,238,.028) 1px, transparent 1px);
    background-size: 48px 48px;
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    font-size: 16px;
    line-height: 1.75;
    overflow-x: hidden;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color .2s ease;
}
button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    border: none;
    outline: none;
}
ul,
ol {
    list-style: none;
}
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}
.section {
    padding: var(--space-section) 0;
    position: relative;
}
.section-heading {
    max-width: 680px;
    margin-bottom: 44px;
}
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .06em;
    color: var(--accent);
    background: rgba(34,211,238,.08);
    border: 1px solid rgba(34,211,238,.18);
    padding: 4px 14px;
    border-radius: var(--radius-pill);
    margin-bottom: 14px;
}
.section-heading h2 {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.3;
    margin-bottom: 12px;
}
.section-heading p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    padding: 12px 26px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all .25s ease;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), #1E54D6);
    color: #fff;
    box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #2563EB);
    box-shadow: 0 0 32px rgba(46,107,255,.6);
    transform: translateY(-2px);
}
.btn-primary:active {
    transform: scale(.98);
}
.btn-ghost {
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.14);
    color: var(--text-primary);
}
.btn-ghost:hover {
    background: rgba(255,255,255,.1);
    border-color: rgba(255,255,255,.25);
}
.btn-warm {
    background: linear-gradient(135deg, var(--warm), #E89520);
    color: #0A1222;
    box-shadow: 0 0 20px rgba(255,178,36,.25);
}
.btn-warm:hover {
    box-shadow: 0 0 32px rgba(255,178,36,.4);
    transform: translateY(-2px);
}
.btn-sm {
    padding: 9px 18px;
    font-size: 14px;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    line-height: 1.5;
}
.badge-primary {
    background: rgba(46,107,255,.15);
    color: #7BA5FF;
    border: 1px solid rgba(46,107,255,.25);
}
.badge-accent {
    background: rgba(34,211,238,.1);
    color: var(--accent);
    border: 1px solid rgba(34,211,238,.2);
}
.badge-warm {
    background: rgba(255,178,36,.12);
    color: var(--warm);
    border: 1px solid rgba(255,178,36,.25);
}
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    background: rgba(5,10,24,.78);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}
.logo {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -.01em;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    color: #fff;
    box-shadow: 0 0 14px rgba(46,107,255,.35);
    flex-shrink: 0;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all .2s ease;
}
.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,.05);
}
.nav-link.active {
    color: #fff;
    background: rgba(46,107,255,.15);
    font-weight: 600;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}
.search-toggle {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all .2s;
    cursor: pointer;
}
.search-toggle:hover {
    color: #fff;
    background: rgba(255,255,255,.06);
}
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    background: rgba(255,255,255,.05);
}
.menu-toggle i {
    font-size: 18px;
}
.breadcrumb {
    padding: calc(var(--nav-height) + 30px) 0 20px;
    font-size: 13px;
    color: var(--text-muted);
}
.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--text-muted);
    transition: color .2s;
}
.breadcrumb a:hover {
    color: var(--accent);
}
.breadcrumb .sep {
    color: var(--text-muted);
    opacity: .6;
}
.breadcrumb .current {
    color: var(--text-secondary);
    max-width: 420px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-page {
    position: relative;
    padding: 20px 0 64px;
}
.article-page::before {
    content: '';
    position: absolute;
    top: 100px;
    right: -120px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(34,211,238,.07), transparent 65%);
    pointer-events: none;
}
.article-wrap {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}
.article-header {
    margin-bottom: 32px;
}
.article-header h1 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -.02em;
    margin-bottom: 18px;
    word-break: break-word;
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.article-meta .meta-date {
    font-size: 13px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-summary {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    border-left: 3px solid var(--primary);
    background: rgba(46,107,255,.05);
    border-radius: 0 8px 8px 0;
    padding: 14px 18px;
}
.article-content {
    max-width: 780px;
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-primary);
    background: rgba(13,23,45,.42);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 44px 48px;
    box-shadow: var(--shadow-ambient);
}
.article-content > *:first-child {
    margin-top: 0;
}
.article-content > *:last-child {
    margin-bottom: 0;
}
.article-content h2 {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    margin: 36px 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin: 28px 0 12px;
}
.article-content h4 {
    font-size: 17px;
    font-weight: 600;
    margin: 20px 0 10px;
}
.article-content p {
    margin-bottom: 18px;
}
.article-content ul,
.article-content ol {
    margin: 16px 0 20px;
    padding-left: 28px;
}
.article-content ul {
    list-style: disc;
}
.article-content ul ul {
    list-style: circle;
}
.article-content ol {
    list-style: decimal;
}
.article-content li {
    margin-bottom: 8px;
    line-height: 1.8;
}
.article-content li::marker {
    color: var(--accent);
}
.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: rgba(46,107,255,.08);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 18px 22px;
    margin: 24px 0;
    color: var(--text-secondary);
}
.article-content blockquote p {
    margin-bottom: 8px;
}
.article-content blockquote p:last-child {
    margin-bottom: 0;
}
.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    margin: 24px auto;
    box-shadow: var(--shadow-ambient);
}
.article-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: rgba(34,211,238,.4);
    transition: all .2s;
}
.article-content a:hover {
    color: var(--primary-hover);
    text-decoration-color: var(--primary-hover);
}
.article-content strong {
    font-weight: 700;
    color: #fff;
}
.article-content em {
    font-style: italic;
}
.article-content code {
    background: rgba(255,255,255,.08);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 14px;
    font-family: 'Space Grotesk', 'Inter', ui-monospace, SFMono-Regular, Menlo, monospace;
}
.article-content pre {
    background: rgba(3,6,15,.8);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    margin: 24px 0;
}
.article-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.7;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}
.article-content th,
.article-content td {
    border: 1px solid rgba(255,255,255,.1);
    padding: 10px 14px;
    text-align: left;
}
.article-content th {
    background: rgba(255,255,255,.04);
    font-weight: 600;
    color: #fff;
}
.article-content tr:nth-child(even) td {
    background: rgba(255,255,255,.02);
}
.article-not-found {
    text-align: center;
    padding: 72px 40px;
    background: rgba(13,23,45,.42);
    border: 1px dashed rgba(255,255,255,.14);
    border-radius: var(--radius-lg);
}
.article-not-found i {
    font-size: 48px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.article-not-found h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}
.article-not-found p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}
.not-found-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.related-posts {
    padding: 60px 0;
    background: rgba(10,18,34,.45);
    border-top: 1px solid rgba(255,255,255,.04);
    border-bottom: 1px solid rgba(255,255,255,.04);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .25s ease;
}
.related-card:hover {
    transform: translateY(-3px);
    border-color: rgba(46,107,255,.35);
    box-shadow: var(--shadow-ambient);
}
.related-thumb {
    overflow: hidden;
    position: relative;
}
.related-thumb img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    transition: transform .3s ease;
}
.related-card:hover .related-thumb img {
    transform: scale(1.03);
}
.related-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-body h3 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-body p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}
.related-more {
    font-size: 13px;
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.related-card:hover .related-more {
    color: var(--primary-hover);
}
.back-links {
    padding: 36px 0;
}
.back-links .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}
.back-links a {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,.03);
    transition: all .2s ease;
}
.back-links a:hover {
    color: var(--text-primary);
    border-color: rgba(46,107,255,.4);
    background: rgba(46,107,255,.08);
}
.site-footer {
    background: rgba(3,6,15,.92);
    border-top: 1px solid rgba(255,255,255,.04);
    padding: 56px 0 24px;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}
.footer-brand .logo {
    margin-bottom: 16px;
}
.footer-brand-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 360px;
}
.footer-col-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: .04em;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color .2s;
}
.footer-links a:hover {
    color: var(--accent);
}
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-contact span {
    font-size: 14px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-contact i {
    color: var(--accent);
    width: 16px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
}
@media (max-width: 1024px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .article-content {
        padding: 36px 32px;
    }
}
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    .main-nav {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(5,10,24,.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 16px 24px;
        border-bottom: 1px solid rgba(255,255,255,.06);
        box-shadow: 0 20px 40px rgba(0,0,0,.4);
    }
    .main-nav.open {
        display: flex;
    }
    .nav-link {
        padding: 12px 16px;
        width: 100%;
    }
    .header-left {
        gap: 16px;
    }
    .logo {
        font-size: 15px;
    }
    .logo-icon {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
    .breadcrumb {
        padding-top: calc(var(--nav-height) + 20px);
    }
    .article-header h1 {
        font-size: 28px;
    }
    .article-content {
        padding: 28px 24px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
@media (max-width: 576px) {
    .container {
        padding: 0 18px;
    }
    .article-header h1 {
        font-size: 23px;
    }
    .article-content {
        padding: 22px 18px;
        font-size: 15px;
    }
    .article-summary {
        font-size: 14px;
        padding: 12px 14px;
    }
    .breadcrumb .current {
        max-width: 200px;
    }
    .breadcrumb .crumb-cat {
        display: none;
    }
    .article-not-found {
        padding: 48px 20px;
    }
    .back-links .container {
        gap: 14px;
        flex-direction: column;
    }
    .related-thumb img {
        height: 140px;
    }
    .header-left .logo span:last-child {
        max-width: 210px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .btn-sm {
        padding: 8px 14px;
        font-size: 13px;
    }
}
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
}