/* roulang page: index */
:root{
  --primary:#0D7A79;--primary-dark:#0A6463;--primary-darker:#0A5C5B;
  --accent:#E18A2F;--accent-hover:#D47920;
  --bg:#F5F7FA;--bg-alt:#EDF1F5;--card:#FFFFFF;
  --text:#1F2933;--text-secondary:#5A6575;--border:#E4E9F0;
  --success:#2E8B57;--warning:#C0392B;--disabled:#B0B7C3;
  --footer-bg:#17202A;--footer-text:#A9B2BE;--footer-heading:#FFFFFF;
  --radius-btn:8px;--radius-card:10px;--radius-image:14px;--radius-mega:12px;
  --shadow-card:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --shadow-hover:0 12px 24px rgba(16,24,40,.10);
  --shadow-mega:0 20px 40px rgba(16,24,40,.12);
  --transition:150ms ease;
  --max-w:1200px;--nav-h:68px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;background-color:#E4E9F0;color:#fff;font-size:14px;text-align:center;line-height:140px}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none}
button{font-family:var(--font);cursor:pointer;border:none;background:none}
input,button{outline:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-head{text-align:center;margin-bottom:56px}
.section-head h2{font-size:32px;font-weight:800;line-height:1.3;color:var(--text);letter-spacing:-.5px}
.section-head p{color:var(--text-secondary);font-size:16px;max-width:640px;margin:12px auto 0}

/* Top Bar */
.top-bar{background:var(--primary);color:#fff;font-size:13px;height:36px;display:flex;align-items:center;justify-content:center;position:relative;padding:0 48px;overflow:hidden}
.top-bar .top-bar-content{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:80%}
.top-bar .top-bar-close{position:absolute;right:16px;top:50%;transform:translateY(-50%);width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;background:rgba(255,255,255,.2);font-size:14px;line-height:1;transition:var(--transition)}
.top-bar .top-bar-close:hover{background:rgba(255,255,255,.35)}

/* Header / Nav */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);box-shadow:0 1px 4px rgba(16,24,40,.04)}
.nav{max-width:var(--max-w);margin:0 auto;height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--text)}
.nav-logo svg{width:30px;height:30px;flex-shrink:0}
.nav-logo span{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:8px;margin:0;padding:0}
.nav-links li{position:relative}
.nav-links a{display:block;padding:10px 16px;font-size:15px;font-weight:500;color:#3E4756;border-bottom:3px solid transparent;transition:color var(--transition),border-color var(--transition)}
.nav-links a:hover{color:var(--primary);border-bottom-color:var(--primary)}
.nav-links li.active a{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-cta{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#1F2933;font-weight:600;font-size:14px;padding:10px 20px;border-radius:var(--radius-btn);transition:all var(--transition);box-shadow:0 1px 3px rgba(225,138,47,.3)}
.nav-cta:hover{background:var(--accent-hover);color:#1F2933;transform:translateY(-1px);box-shadow:0 4px 12px rgba(225,138,47,.35)}
.mega-trigger{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--text-secondary);padding:8px 12px;border-radius:var(--radius-btn);transition:var(--transition)}
.mega-trigger:hover{color:var(--primary);background:rgba(13,122,121,.06)}
.mega-trigger svg{width:14px;height:14px;transition:transform var(--transition)}
.mega-trigger.active svg{transform:rotate(180deg)}
.hamburger{display:none;width:40px;height:40px;border-radius:8px;justify-content:center;align-items:center;transition:var(--transition)}
.hamburger:hover{background:rgba(13,122,121,.08)}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);margin:3px 0;border-radius:2px;transition:var(--transition)}

/* Mega Panel */
.mega-panel{position:absolute;top:var(--nav-h);left:50%;transform:translateX(-50%) translateY(-8px);width:720px;background:var(--card);border-radius:var(--radius-mega);box-shadow:var(--shadow-mega);border:1px solid var(--border);opacity:0;visibility:hidden;pointer-events:none;transition:all .2s ease;z-index:999;overflow:hidden}
.mega-panel::before{content:'';display:block;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent));position:absolute;top:0;left:0;right:0}
.mega-panel.active{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-inner{display:grid;grid-template-columns:1fr 1fr;padding:28px 32px}
.mega-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.5px}
.mega-card{display:flex;gap:14px;padding:14px;border-radius:var(--radius-card);border:1px solid var(--border);margin-bottom:12px;transition:all var(--transition)}
.mega-card:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.mega-card-icon{width:40px;height:40px;border-radius:8px;background:rgba(13,122,121,.1);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--primary)}
.mega-card-title{font-size:14px;font-weight:600;color:var(--text)}
.mega-card-desc{font-size:12px;color:var(--text-secondary);line-height:1.5;margin-top:2px}
.mega-list{display:flex;flex-direction:column;gap:10px}
.mega-list a{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:8px;font-size:14px;color:var(--text);transition:all var(--transition)}
.mega-list a:hover{background:rgba(13,122,121,.05);color:var(--primary)}
.mega-list a .date{font-size:12px;color:var(--disabled)}
.mega-panel-backdrop{position:fixed;inset:0;background:transparent;z-index:998;display:none}

/* Hero */
.hero{background:var(--bg);position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;top:-120px;right:-80px;width:400px;height:400px;border-radius:50%;background:rgba(13,122,121,.06)}
.hero::after{content:'';position:absolute;bottom:-60px;left:-40px;width:260px;height:260px;border-radius:50%;background:rgba(225,138,47,.05)}
.hero-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center;padding:80px 0 100px;position:relative;z-index:2}
.hero-left h1{font-size:42px;font-weight:800;line-height:1.25;letter-spacing:-1px;color:var(--text);margin-bottom:20px}
.hero-left h1 .highlight{color:var(--primary);position:relative}
.hero-sub{font-size:17px;color:var(--text-secondary);line-height:1.7;max-width:440px;margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-download{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#1F2933;font-weight:700;font-size:16px;padding:14px 32px;border-radius:var(--radius-btn);box-shadow:0 4px 14px rgba(225,138,47,.35);transition:all var(--transition)}
.btn-download:hover{background:var(--accent-hover);color:#1F2933;transform:translateY(-2px);box-shadow:0 6px 20px rgba(225,138,47,.4)}
.btn-download svg{width:18px;height:18px}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:transparent;border:1px solid #C3CBD6;color:var(--text);font-weight:500;font-size:15px;padding:13px 28px;border-radius:var(--radius-btn);transition:all var(--transition)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.hero-meta{display:flex;gap:20px;margin-top:32px;color:var(--text-secondary);font-size:13px;flex-wrap:wrap}
.hero-meta li{position:relative;padding-left:22px}
.hero-meta li::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:14px;height:14px;border-radius:4px;background:rgba(13,122,121,.15)}
.hero-meta li:first-child::before{background:rgba(225,138,47,.2)}
.hero-right{position:relative}
.browser-window{background:var(--card);border-radius:var(--radius-image);box-shadow:0 20px 50px rgba(16,24,40,.12);border:4px solid var(--primary);overflow:hidden;position:relative}
.browser-window::before{content:'';display:block;height:40px;background:var(--bg-alt);border-bottom:1px solid var(--border);position:relative;z-index:2}
.browser-window::after{content:'● ● ●';position:absolute;top:11px;left:16px;font-size:12px;color:var(--disabled);letter-spacing:6px;z-index:3}
.browser-content{position:relative;background:var(--bg-alt);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;overflow:hidden}
.browser-content img{width:100%;height:100%;object-fit:cover}

/* Carousel */
.carousel-section{background:var(--bg-alt);padding:88px 0}
.carousel-wrap{position:relative;max-width:900px;margin:0 auto}
.carousel-window{position:relative;border-radius:var(--radius-image);overflow:hidden;box-shadow:var(--shadow-hover);background:var(--card)}
.carousel-slides{position:relative;height:480px;overflow:hidden}
.carousel-slide{position:absolute;inset:0;opacity:0;transition:opacity .5s ease;display:flex;align-items:center;justify-content:center;background:var(--bg-alt)}
.carousel-slide.active{opacity:1;z-index:2}
.carousel-slide img{width:100%;height:100%;object-fit:cover}
.carousel-caption{position:absolute;bottom:0;left:0;right:0;padding:20px 28px;background:linear-gradient(to top,rgba(16,24,40,.75),transparent);color:#fff;font-size:15px;font-weight:500;z-index:3}
.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(16,24,40,.15);display:flex;align-items:center;justify-content:center;z-index:10;transition:all var(--transition);color:var(--text)}
.carousel-arrow:hover{background:var(--primary);color:#fff}
.carousel-arrow.prev{left:-22px}
.carousel-arrow.next{right:-22px}
.carousel-arrow svg{width:18px;height:18px}
.carousel-thumbs{display:flex;justify-content:center;gap:14px;margin-top:24px}
.carousel-thumb{width:110px;height:72px;border-radius:8px;overflow:hidden;cursor:pointer;border:3px solid transparent;opacity:.7;transition:all var(--transition);padding:0;background:none}
.carousel-thumb img{width:100%;height:100%;object-fit:cover}
.carousel-thumb:hover{opacity:1}
.carousel-thumb.active{border-color:var(--primary);opacity:1}
.carousel-dots{display:flex;justify-content:center;gap:8px;margin-top:20px}
.carousel-dots button{width:8px;height:8px;border-radius:4px;background:var(--disabled);transition:all var(--transition);padding:0}
.carousel-dots button.active{width:24px;background:var(--primary)}

/* Features */
.features{padding:88px 0}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:40px 0}
.feature-row.reverse .feature-text{order:2}
.feature-row.reverse .feature-img{order:1}
.feature-kicker{font-size:13px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.feature-text h3{font-size:26px;font-weight:700;margin-bottom:14px;color:var(--text);line-height:1.4}
.feature-text p{color:var(--text-secondary);font-size:15px;line-height:1.8}
.feature-img{position:relative;border-radius:var(--radius-image);overflow:hidden;box-shadow:var(--shadow-card);transition:all var(--transition)}
.feature-img:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.feature-img img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-image)}
.feature-img::after{content:'';position:absolute;inset:0;border:1px solid rgba(13,122,121,.2);border-radius:var(--radius-image);pointer-events:none}
.feature-action{display:flex;margin-top:20px}
.tag-demo{display:inline-flex;align-items:center;background:rgba(13,122,121,.08);color:var(--primary);font-size:13px;font-weight:500;padding:6px 14px;border-radius:20px;gap:6px}
.action-strip{margin-top:32px;background:var(--bg-alt);border-radius:var(--radius-card);padding:28px 32px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
.action-strip p{font-size:16px;font-weight:600;color:var(--text)}
.action-strip .btn-download{padding:12px 24px;font-size:15px}

/* System Requirements */
.sysreq{background:var(--footer-bg);color:#fff;padding:88px 0}
.sysreq .section-head h2{color:#fff}
.sysreq .section-head p{color:#A9B2BE}
.sysreq-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:48px;align-items:start}
.sysreq-os{display:flex;flex-direction:column;gap:16px}
.os-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-card);padding:20px 24px;display:flex;align-items:center;gap:16px;transition:all var(--transition)}
.os-item:hover{border-color:var(--primary);background:rgba(13,122,121,.15)}
.os-icon{width:42px;height:42px;border-radius:10px;background:rgba(225,138,47,.2);display:flex;align-items:center;justify-content:center;color:var(--accent);flex-shrink:0}
.os-name{font-size:15px;font-weight:600}
.os-desc{font-size:13px;color:#A9B2BE;margin-top:2px}
.sysreq-specs{display:grid;gap:12px}
.spec-row{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);border-radius:10px;padding:14px 20px;transition:var(--transition)}
.spec-row:hover{border-color:rgba(13,122,121,.5)}
.spec-icon{width:32px;height:32px;border-radius:8px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;font-size:14px}
.spec-label{font-size:13px;color:#A9B2BE;width:100px;flex-shrink:0}
.spec-value{font-size:14px;font-weight:500;color:#fff}
.compat-tip{margin-top:28px;padding:16px 20px;background:rgba(13,122,121,.15);border-left:4px solid var(--primary);border-radius:0 10px 10px 0;font-size:14px;color:#E4E9F0;display:flex;align-items:center;gap:12px}

/* Download Section */
.download-section{background:#FFF6EA;padding:80px 0}
.download-section .section-head h2{color:var(--text)}
.download-btn-group{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.download-btn{width:180px;height:48px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:15px;font-weight:600;transition:all var(--transition);text-decoration:none}
.download-btn.primary{background:var(--accent);color:#1F2933;box-shadow:0 4px 12px rgba(225,138,47,.3)}
.download-btn.primary:hover{background:var(--accent-hover);color:#1F2933;transform:translateY(-2px);box-shadow:0 6px 20px rgba(225,138,47,.35)}
.download-btn.secondary{background:#fff;border:1px solid #C3CBD6;color:var(--text)}
.download-btn.secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.download-btn svg{width:16px;height:16px}
.download-note{text-align:center;color:var(--text-secondary);font-size:13px;margin-top:24px}

/* Testimonials */
.testimonials{padding:88px 0;background:var(--card)}
.stars-row{display:flex;justify-content:center;gap:4px;margin-bottom:8px}
.stars-row svg{width:20px;height:20px;color:var(--accent);fill:var(--accent)}
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.testimonial-card{background:var(--card);border-top:3px solid var(--primary);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-card);position:relative;overflow:hidden;transition:all var(--transition)}
.testimonial-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.testimonial-card::before{content:'“';position:absolute;top:-10px;right:10px;font-size:100px;color:rgba(13,122,121,.06);font-family:Georgia,serif;line-height:1}
.testimonial-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.testimonial-avatar{width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.testimonial-avatar.a2{background:var(--accent);color:#1F2933}
.testimonial-avatar.a3{background:#4A7BA6}
.testimonial-name{font-size:14px;font-weight:600;color:var(--text)}
.testimonial-role{font-size:12px;color:var(--text-secondary)}
.testimonial-body{font-size:14px;line-height:1.75;color:var(--text-secondary)}
.testimonial-stars{margin-top:14px;display:flex;gap:2px}
.testimonial-stars svg{width:16px;height:16px;color:var(--accent);fill:var(--accent)}

/* News */
.news-section{padding:88px 0;background:var(--bg)}
.news-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:40px}
.news-header h2{font-size:28px;font-weight:800;color:var(--text)}
.news-header .more{font-size:14px;font-weight:500;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.news-header .more:hover{text-decoration:underline}
.news-list{display:flex;flex-direction:column;gap:20px}
.news-card{background:var(--card);border-radius:var(--radius-card);border:1px solid var(--border);box-shadow:var(--shadow-card);display:flex;overflow:hidden;transition:all var(--transition)}
.news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--primary)}
.news-thumb{width:260px;min-height:160px;flex-shrink:0;overflow:hidden;background:var(--bg-alt)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:24px 28px;display:flex;flex-direction:column;justify-content:center}
.news-body h3{font-size:17px;font-weight:700;margin-bottom:8px;line-height:1.4}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{font-size:14px;color:var(--text-secondary);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:14px;margin-top:14px;flex-wrap:wrap}
.news-tag{background:rgba(13,122,121,.1);color:var(--primary);font-size:12px;font-weight:600;padding:3px 12px;border-radius:20px}
.news-time{font-size:12px;color:var(--disabled)}
.news-link{margin-left:auto;font-size:13px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:4px}
.news-link:hover{text-decoration:underline}
.news-empty{background:var(--card);border:1px dashed var(--border);border-radius:var(--radius-card);padding:60px 40px;text-align:center}
.news-empty-icon{width:64px;height:64px;border-radius:20px;background:rgba(13,122,121,.08);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;color:var(--primary);font-size:28px}
.news-empty h3{font-size:18px;font-weight:700;color:var(--text);margin-bottom:8px}
.news-empty p{font-size:14px;color:var(--text-secondary);margin-bottom:20px}

/* FAQ */
.faq-section{padding:88px 0;background:var(--card)}
.faq-layout{display:grid;grid-template-columns:0.8fr 1.2fr;gap:64px;align-items:start}
.faq-left h2{font-size:32px;font-weight:800;margin-bottom:16px}
.faq-left p{color:var(--text-secondary);font-size:15px;line-height:1.8}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;transition:all var(--transition)}
.faq-item.active{border-color:var(--primary);box-shadow:var(--shadow-card)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px 18px 24px;font-size:15px;font-weight:600;color:var(--text);text-align:left;min-height:60px;transition:var(--transition)}
.faq-q:hover{color:var(--primary)}
.faq-icon{width:26px;height:26px;border-radius:50%;background:rgba(13,122,121,.1);flex-shrink:0;display:flex;align-items:center;justify-content:center;position:relative;transition:all var(--transition)}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--primary);border-radius:1px;transition:transform .25s ease}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item.active .faq-icon{background:var(--primary)}
.faq-item.active .faq-icon::before,.faq-item.active .faq-icon::after{background:#fff}
.faq-item.active .faq-icon::before{transform:rotate(180deg)}
.faq-item.active .faq-icon::after{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 24px 0 24px;color:var(--text-secondary);font-size:14px;line-height:1.75}
.faq-item.active .faq-a{max-height:400px;padding:0 24px 20px 24px}

/* Final CTA */
.final-cta{background:var(--primary-darker);padding:80px 0;text-align:center;position:relative;overflow:hidden}
.final-cta::before{content:'';position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:500px;height:500px;border-radius:50%;background:rgba(255,255,255,.05)}
.final-cta h2{font-size:34px;font-weight:800;color:#fff;margin-bottom:12px;position:relative}
.final-cta p{color:rgba(255,255,255,.85);font-size:16px;margin-bottom:36px;position:relative}
.final-cta-btn{display:inline-flex;align-items:center;gap:10px;background:#fff;color:var(--primary-darker);font-weight:700;font-size:16px;padding:14px 40px;border-radius:var(--radius-btn);box-shadow:0 4px 16px rgba(0,0,0,.2);transition:all var(--transition);position:relative}
.final-cta-btn:hover{background:var(--accent);color:#1F2933;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.3)}
.final-cta-btn svg{width:18px;height:18px}

/* Footer */
.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer-brand .nav-logo{color:#fff;font-size:20px;font-weight:800;margin-bottom:16px}
.footer-brand .nav-logo svg{width:30px;height:30px}
.footer-brand .nav-logo span{color:#fff}
.footer-brand p{font-size:13px;line-height:1.8;color:#A9B2BE;max-width:260px}
.footer-col h4{color:var(--footer-heading);font-size:14px;font-weight:600;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#A9B2BE;font-size:13px;transition:color var(--transition)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid #333E4D;padding:24px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:#7B8794}
.footer-bottom a{color:#A9B2BE}
.footer-bottom a:hover{color:var(--accent)}

/* Focus states */
a:focus-visible,button:focus-visible{outline:2px solid #A8DADC;outline-offset:2px;border-radius:4px}

/* Responsive */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-actions,.hero-meta{justify-content:center}
  .hero-meta{justify-content:center}
  .carousel-slides{height:400px}
  .feature-row{grid-template-columns:1fr;gap:32px;text-align:center}
  .feature-row.reverse .feature-text{order:1}
  .feature-row.reverse .feature-img{order:2}
  .feature-text p{margin:0 auto}
  .sysreq-grid{grid-template-columns:1fr}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .testimonial-grid{grid-template-columns:1fr 1fr}
  .news-thumb{width:200px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .mega-panel{width:600px;left:auto;right:0;transform:translateY(-8px)}
  .mega-panel.active{transform:translateY(0)}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .nav{height:60px}
  .nav-links,.nav-cta,.mega-trigger{display:none}
  .hamburger{display:flex}
  .hero-inner{padding:48px 0 56px}
  .hero-left h1{font-size:30px}
  .hero-sub{font-size:15px}
  .carousel-slides{height:300px}
  .testimonial-grid{grid-template-columns:1fr}
  .news-card{flex-direction:column}
  .news-thumb{width:100%;min-height:160px}
  .download-btn-group{flex-direction:column;align-items:center}
  .download-btn{width:100%;max-width:280px}
  .footer-grid{grid-template-columns:1fr}
  .feature-row{gap:24px}
  .action-strip{flex-direction:column;text-align:center}
  .logo-text{font-size:18px}
  /* Mobile drawer */
  .mobile-drawer{position:fixed;top:0;right:-100%;width:100%;height:100%;background:var(--card);z-index:2000;transition:right .3s ease;display:flex;flex-direction:column;padding:80px 32px 32px}
  .mobile-drawer.active{right:0}
  .mobile-drawer .drawer-close{position:absolute;top:16px;right:16px;width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--text);background:rgba(13,122,121,.08)}
  .mobile-drawer nav{display:flex;flex-direction:column;gap:8px}
  .mobile-drawer nav a{font-size:20px;font-weight:600;padding:14px 0;border-bottom:1px solid var(--border);color:var(--text)}
  .mobile-drawer nav a:hover{color:var(--primary)}
  .mobile-drawer .drawer-cta{margin-top:32px}
  .mobile-drawer .drawer-cta .btn-download{width:100%;justify-content:center}
  .drawer-overlay{position:fixed;inset:0;background:rgba(16,24,40,.4);z-index:1999;opacity:0;visibility:hidden;transition:var(--transition)}
  .drawer-overlay.active{opacity:1;visibility:visible}
}
@media (max-width:520px){
  .hero-left h1{font-size:26px}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn-download,.hero-actions .btn-secondary{width:100%;justify-content:center}
  .carousel-slides{height:220px}
  .carousel-arrow{width:36px;height:36px}
  .carousel-arrow.prev{left:-8px}
  .carousel-arrow.next{right:-8px}
  .carousel-thumb{width:90px;height:60px}
  .section-head h2{font-size:24px}
  .news-thumb{min-height:140px}
  .top-bar{font-size:12px;padding:0 36px}
  .top-bar .top-bar-close{right:8px}
  .final-cta h2{font-size:26px}
}

/* roulang page: category1 */
:root {
            --bg: #F5F7FA;
            --panel: #FFFFFF;
            --text: #1F2933;
            --text-light: #5A6575;
            --border: #E4E9F0;
            --primary: #0D7A79;
            --primary-dark: #0A6463;
            --primary-deep: #0A5C5B;
            --accent: #E18A2F;
            --accent-dark: #D47920;
            --success: #2E8B57;
            --warning: #C0392B;
            --disabled: #B0B7C3;
            --dark: #1F2933;
            --dark-footer: #17202A;
            --radius-sm: 8px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-panel: 12px;
            --shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 1px 2px rgba(16, 24, 40, 0.04);
            --shadow-hover: 0 12px 24px rgba(16, 24, 40, 0.10);
            --shadow-mega: 0 20px 40px rgba(16, 24, 40, 0.12);
            --transition: 150ms ease;
            --container: 1200px;
            --space-section: 80px;
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button {
            font-family: var(--font);
            cursor: pointer;
            border: none;
            background: none;
        }

        ul {
            list-style: none;
        }

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

        .section {
            padding: var(--space-section) 0;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid #A8DADC;
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(13, 122, 121, 0.25);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(13, 122, 121, 0.2);
        }

        .btn-download {
            background: var(--accent);
            color: var(--text);
        }

        .btn-download:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(225, 138, 47, 0.3);
            color: var(--text);
        }

        .btn-download:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(225, 138, 47, 0.25);
        }

        .btn-outline {
            background: #fff;
            border-color: #C3CBD6;
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(13, 122, 121, 0.1);
        }

        .btn-light {
            background: #fff;
            color: var(--accent-dark);
        }

        .btn-light:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        /* 标签 */
        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            line-height: 1;
            padding: 6px 12px;
            border-radius: 999px;
            background: rgba(13, 122, 121, 0.1);
            color: var(--primary);
        }

        .tag-accent {
            background: rgba(225, 138, 47, 0.12);
            color: var(--accent-dark);
        }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(228, 233, 240, 0.7);
        }

        .nav {
            max-width: var(--container);
            margin: 0 auto;
            height: 68px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            line-height: 1;
        }

        .nav-logo svg {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--text);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0;
        }

        .nav-links li a {
            display: block;
            font-size: 15px;
            font-weight: 500;
            color: #3E4756;
            padding: 22px 0 19px;
            border-bottom: 3px solid transparent;
            line-height: 1.2;
            transition: color var(--transition), border-color var(--transition);
        }

        .nav-links li a:hover {
            color: var(--primary);
        }

        .nav-links li.active a {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .mega-trigger {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 500;
            color: #3E4756;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }

        .mega-trigger:hover {
            color: var(--primary);
            background: rgba(13, 122, 121, 0.06);
        }

        .mega-trigger svg {
            width: 14px;
            height: 14px;
            transition: transform var(--transition);
        }

        .mega-trigger[aria-expanded="true"] svg {
            transform: rotate(180deg);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 38px;
            padding: 0 18px;
            border-radius: var(--radius-sm);
            background: var(--accent);
            color: var(--text);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
        }

        .nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(225, 138, 47, 0.3);
            color: var(--text);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .hamburger:hover span {
            background: var(--primary);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mega 面板 */
        .mega-panel {
            position: absolute;
            top: 68px;
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            width: 720px;
            max-width: calc(100vw - 48px);
            background: #fff;
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-mega);
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition);
            border-top: 3px solid transparent;
            border-image: linear-gradient(90deg, var(--primary), var(--accent)) 1;
            border-top-width: 3px;
        }

        .mega-panel.open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }

        .mega-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            padding: 28px;
        }

        .mega-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
        }

        .mega-card {
            display: flex;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mega-card:hover {
            background: rgba(13, 122, 121, 0.05);
        }

        .mega-card-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(13, 122, 121, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .mega-card-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .mega-card-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.5;
            margin-top: 2px;
        }

        .mega-item {
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mega-item:hover {
            background: rgba(13, 122, 121, 0.05);
        }

        .mega-item a {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 2px;
        }

        .mega-item a:hover {
            color: var(--primary);
        }

        .mega-item-date {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 面包屑 */
        .breadcrumb-bar {
            background: #EDF1F5;
            height: 48px;
            display: flex;
            align-items: center;
            margin-top: 68px;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb-bar nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
        }

        .breadcrumb-bar a {
            color: var(--text-light);
            font-weight: 500;
        }

        .breadcrumb-bar a:hover {
            color: var(--primary);
        }

        .breadcrumb-bar nav>span {
            color: #C3CBD6;
        }

        .breadcrumb-bar .current {
            color: #8A94A6;
            font-weight: 500;
        }

        /* 分类 Hero */
        .category-hero {
            padding: 72px 0 80px;
            background: linear-gradient(180deg, #EAF4F4 0%, #F5F7FA 100%);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(13, 122, 121, 0.06);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(13, 122, 121, 0.1);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .hero-subtitle {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 14px;
        }

        .hero-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-light);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-window {
            border-radius: var(--radius-lg);
            border: 4px solid var(--primary);
            box-shadow: var(--shadow-hover);
            overflow: hidden;
            background: #fff;
            position: relative;
        }

        .hero-window::before {
            content: "";
            display: block;
            height: 36px;
            background: linear-gradient(90deg, #F1F3F6, #E8ECF1);
            border-bottom: 1px solid var(--border);
        }

        .hero-window img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* 专题卡片 */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .topic-card {
            background: var(--panel);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

        .topic-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(13, 122, 121, 0.3);
        }

        .topic-card img {
            width: 100%;
            height: 168px;
            object-fit: cover;
        }

        .topic-body {
            padding: 20px 22px 24px;
        }

        .topic-body .tag {
            margin-bottom: 12px;
        }

        .topic-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .topic-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .topic-body a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .topic-body a:hover {
            color: var(--accent-dark);
        }

        /* 适用场景 */
        .scenarios {
            background: #EDF1F5;
        }

        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 40px 0;
        }

        .scenario-row+.scenario-row {
            border-top: 1px solid var(--border);
        }

        .scenario-row:nth-child(even) .scenario-img {
            order: 2;
        }

        .scenario-row:nth-child(even) .scenario-text {
            order: 1;
        }

        .scenario-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .scenario-img img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 300ms ease;
        }

        .scenario-img:hover img {
            transform: scale(1.02);
        }

        .scenario-text h3 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .scenario-text p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .scenario-text .tag {
            margin-bottom: 12px;
        }

        /* 学习流程 */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin-top: 16px;
        }

        .step-item {
            background: var(--panel);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: center;
            position: relative;
            transition: all var(--transition);
        }

        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .step-item h3 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* 内容卡片列表 */
        .list-cards {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .list-card {
            display: grid;
            grid-template-columns: 280px 1fr;
            background: var(--panel);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

        .list-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .list-card-img {
            height: 100%;
            min-height: 180px;
        }

        .list-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .list-card-body {
            padding: 24px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .list-card-body .tag {
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .list-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .list-card-body h3 a {
            color: var(--text);
        }

        .list-card-body h3 a:hover {
            color: var(--primary);
        }

        .list-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .list-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: #8A94A6;
        }

        /* 分页器 */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
        }

        .pagination a,
        .pagination span {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 500;
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text-light);
            transition: all var(--transition);
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .pagination .current {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        .pagination .next {
            width: auto;
            padding: 0 16px;
            border-radius: 999px;
        }

        /* FAQ */
        .faq-wrap {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
            align-items: start;
        }

        .faq-title h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .faq-title p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--panel);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }

        .faq-item.open {
            border-color: rgba(13, 122, 121, 0.4);
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 22px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            transition: color var(--transition);
        }

        .faq-q:hover {
            color: var(--primary);
        }

        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: #8A94A6;
            border-radius: 2px;
            transition: all var(--transition);
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 9px;
            left: 3px;
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 3px;
            left: 9px;
        }

        .faq-item.open .faq-icon::after {
            transform: rotate(90deg);
            opacity: 0;
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 300ms ease;
        }

        .faq-a-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        /* CTA 行动条 */
        .cta-banner {
            background: #FFF6EA;
            border-top: 1px solid rgba(225, 138, 47, 0.2);
            border-bottom: 1px solid rgba(225, 138, 47, 0.2);
            padding: 64px 0;
        }

        .cta-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark-footer);
            color: #A9B2BE;
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.9fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            margin-top: 16px;
            color: #7A8494;
        }

        .footer-brand .nav-logo {
            color: #fff;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: #A9B2BE;
            transition: color var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid #333E4D;
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            font-size: 13px;
            color: #7A8494;
        }

        /* 响应式 */
        @media (max-width: 1023px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-window img {
                height: 280px;
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .scenario-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .scenario-row:nth-child(even) .scenario-img {
                order: 0;
            }

            .scenario-row:nth-child(even) .scenario-text {
                order: 0;
            }

            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .list-card {
                grid-template-columns: 1fr;
            }

            .list-card-img {
                min-height: 0;
                max-height: 200px;
            }

            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .nav-links {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mega-panel {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                transform: none;
                width: 100%;
                max-width: 100%;
                border-radius: 0;
                border-top: 3px solid var(--primary);
            }

            .mega-panel.open {
                transform: none;
            }
        }

        @media (max-width: 767px) {
            :root {
                --space-section: 48px;
            }

            .container {
                padding: 0 16px;
            }

            .hero-content h1 {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-meta {
                gap: 12px;
                font-size: 12px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .list-card-body {
                padding: 18px 20px;
            }

            .list-card-body h3 {
                font-size: 16px;
            }

            .cta-inner h2 {
                font-size: 24px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .mega-inner {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 20px;
                max-height: 70vh;
                overflow-y: auto;
            }

            .nav {
                padding: 0 16px;
            }

            .mega-trigger {
                display: none;
            }

            .site-header {
                position: fixed;
            }

            .breadcrumb-bar {
                margin-top: 68px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .scenario-text h3 {
                font-size: 20px;
            }

            .faq-title h2 {
                font-size: 26px;
            }

            .pagination {
                flex-wrap: wrap;
            }
        }

/* roulang page: article */
:root {
  --bg: #F5F7FA;
  --panel: #FFFFFF;
  --text: #1F2933;
  --text-secondary: #5A6575;
  --border: #E4E9F0;
  --primary: #0D7A79;
  --primary-dark: #0A6463;
  --primary-light: #E7F2F2;
  --accent: #E18A2F;
  --accent-dark: #D47920;
  --accent-light: #FFF6EA;
  --success: #2E8B57;
  --danger: #C0392B;
  --disabled: #B0B7C3;
  --dark: #1F2933;
  --footer-bg: #17202A;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(16,24,40,0.06), 0 1px 2px rgba(16,24,40,0.04);
  --shadow-md: 0 12px 24px rgba(16,24,40,0.10);
  --shadow-lg: 0 20px 40px rgba(16,24,40,0.12);
  --transition: 150ms ease;
  --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
}
.nav-logo:hover { color: var(--text); }
.nav-logo svg { width: 36px; height: 36px; flex-shrink: 0; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  font-weight: 500;
  color: #3E4756;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav-links a:hover,
.nav-links .active a {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.nav-right { display: flex; align-items: center; gap: 16px; }
.mega-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 15px;
  font-weight: 500;
  color: #3E4756;
  background: transparent;
  border: 0;
  padding: 10px 4px;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.mega-trigger:hover,
.mega-trigger[aria-expanded="true"] {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.mega-trigger svg { width: 14px; height: 14px; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover { background: var(--accent-dark); color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.nav-cta:focus-visible { outline: 2px solid #A8DADC; outline-offset: 2px; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.hamburger:hover span { background: var(--primary); }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Mega 下拉面板 ===== */
.mega-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  border-top: 3px solid var(--primary);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  pointer-events: none;
}
.mega-panel.open { opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto; }
.mega-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px 24px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.mega-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  margin: 0 0 16px;
}
.mega-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.mega-card:hover { background: #F0F6F6; }
.mega-card-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mega-card-title { font-size: 14px; font-weight: 600; color: var(--text); }
.mega-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.mega-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  border-bottom: 1px solid #F0F2F5;
  transition: background var(--transition), color var(--transition);
}
.mega-link:hover { background: #F0F6F6; color: var(--primary); }
.mega-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}
.mega-link span:nth-child(2) { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mega-date { font-size: 12px; color: var(--disabled); flex-shrink: 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid #A8DADC; outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
.btn-download { background: var(--accent); color: var(--text); }
.btn-download:hover { background: var(--accent-dark); color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-download:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
.btn-secondary { background: var(--panel); color: var(--text); border-color: #C3CBD6; }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-secondary:active { transform: translateY(0); box-shadow: none; }
.btn-light { background: #fff; color: var(--accent); }
.btn-light:hover { background: var(--accent); color: #fff; transform: translateY(-1px); box-shadow: 0 8px 20px rgba(0,0,0,0.18); }
.btn-light:active { transform: translateY(0); }

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: #EDF1F5;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.breadcrumb-inner a { color: var(--text-secondary); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--disabled); }
.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 文章主体 ===== */
.article-section { padding: 48px 0 24px; }
.article-wrap { max-width: 960px; margin: 0 auto; }
.article-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 48px 56px 56px;
}
.article-head { text-align: center; }
.article-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 6px;
  padding: 4px 14px;
  margin-bottom: 16px;
}
.article-head h1 {
  font-size: 32px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}
.article-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item svg { width: 15px; height: 15px; opacity: 0.6; }
.article-summary {
  text-align: left;
  background: #F8F9FB;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 18px 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin: 0 0 40px;
  aspect-ratio: 16 / 9;
  background: #EDF1F5;
}
.article-cover img { width: 100%; height: 100%; object-fit: cover; }

/* ===== 正文阅读区 ===== */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  word-break: break-word;
}
.article-content h2 {
  font-size: 22px;
  color: var(--primary);
  font-weight: 700;
  margin: 36px 0 16px;
  line-height: 1.4;
}
.article-content h3 {
  font-size: 18px;
  color: var(--text);
  font-weight: 700;
  margin: 28px 0 12px;
}
.article-content p { margin: 0 0 1.2em; }
.article-content ul,
.article-content ol { margin: 0 0 1.2em; padding-left: 24px; }
.article-content ul li { list-style: none; position: relative; padding-left: 18px; margin-bottom: 8px; }
.article-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 2px;
}
.article-content ol li { margin-bottom: 8px; }
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 22px;
  background: #F8F9FB;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
}
.article-content blockquote p { margin: 0; }
.article-content code {
  background: #F0F2F5;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.article-content pre {
  background: var(--dark);
  color: #F5F7FA;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.6;
}
.article-content pre code { background: transparent; border: 0; color: inherit; padding: 0; }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  font-size: 14px;
}
.article-content th { background: #F8F9FB; font-weight: 600; }
.article-content hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.article-content strong { font-weight: 700; }

/* ===== 空状态 ===== */
.article-empty {
  text-align: center;
  background: #F8F9FB;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 64px 24px;
}
.empty-icon {
  width: 84px;
  height: 84px;
  margin: 0 auto 24px;
}
.empty-icon svg { width: 100%; height: 100%; }
.article-empty p { font-size: 18px; font-weight: 600; color: var(--text); margin: 0 0 8px; }
.article-empty .empty-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; }

/* ===== 文章尾部工具条 ===== */
.article-tools {
  max-width: 760px;
  margin: 36px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.article-tool-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.article-tool-link:hover { background: var(--primary-light); }
.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.share-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  padding: 0;
}
.share-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
}
.share-btn:focus-visible { outline: 2px solid #A8DADC; outline-offset: 2px; }
.share-btn.copied { border-color: var(--success); color: var(--success); background: #F0F8F3; }
.share-btn svg { width: 16px; height: 16px; }

/* ===== 相关阅读 ===== */
.related-section { padding: 48px 0 64px; }
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.section-head h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  margin: 0;
  position: relative;
  padding-left: 16px;
}
.section-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 22px;
  background: var(--primary);
  border-radius: 3px;
}
.section-more {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.section-more:hover { background: var(--primary-light); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  color: inherit;
}
.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  color: inherit;
}
.related-card-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #EDF1F5;
}
.related-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}
.related-card:hover .related-card-cover img { transform: scale(1.04); }
.related-card-body { padding: 20px 20px 24px; }
.related-card-body h3 {
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  margin: 0 0 10px;
  font-weight: 700;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-body .related-date {
  font-size: 13px;
  color: var(--disabled);
  display: flex;
  align-items: center;
  gap: 6px;
}
.related-card-body .related-date svg { width: 14px; height: 14px; }

/* ===== CTA 区块 ===== */
.article-cta {
  background: #0A5C5B;
  padding: 72px 0;
  text-align: center;
  color: #fff;
}
.article-cta h2 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 14px;
  line-height: 1.3;
}
.article-cta p {
  color: rgba(255,255,255,0.82);
  margin: 0 auto 32px;
  font-size: 16px;
  max-width: 560px;
  line-height: 1.7;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: #A9B2BE;
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
.footer-brand .nav-logo:hover { color: #fff; }
.footer-brand p {
  line-height: 1.75;
  margin: 16px 0 0;
  max-width: 320px;
  color: #A9B2BE;
}
.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 18px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #A9B2BE; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-col a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.footer-bottom {
  border-top: 1px solid #333E4D;
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #8894A5;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .hamburger { display: flex; }
  .mega-trigger { display: none; }
  .mega-panel { display: none; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--panel);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 32px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 99;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-links li { width: 100%; }
  .nav-links a {
    padding: 12px 8px;
    font-size: 17px;
    width: 100%;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }
  .nav-links a:hover,
  .nav-links .active a {
    border-left-color: var(--primary);
    border-bottom-color: transparent;
  }
  .article-card { padding: 40px 40px 48px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  body { font-size: 15px; }
  .container { padding: 0 16px; }
  .nav { padding: 0 16px; height: 60px; }
  .nav-links { top: 60px; }
  .nav-cta {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
    font-size: 0;
  }
  .nav-cta svg { width: 18px; height: 18px; margin: 0; }
  .breadcrumb-inner { padding: 10px 16px; font-size: 13px; }
  .breadcrumb-current { max-width: 180px; }
  .article-section { padding: 24px 0 16px; }
  .article-card { padding: 28px 20px 36px; border-radius: var(--radius-md); }
  .article-head h1 { font-size: 24px; }
  .article-meta { gap: 8px 16px; font-size: 13px; }
  .article-summary { padding: 14px 16px; font-size: 14px; }
  .article-cover { margin-bottom: 28px; }
  .article-content { font-size: 15px; }
  .article-content h2 { font-size: 20px; }
  .article-content h3 { font-size: 17px; }
  .article-tools { flex-direction: column; align-items: flex-start; }
  .related-section { padding: 32px 0 40px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .section-head h2 { font-size: 20px; }
  .article-cta { padding: 48px 0; }
  .article-cta h2 { font-size: 24px; }
  .article-cta p { font-size: 15px; }
  .cta-buttons .btn { width: 100%; max-width: 320px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .site-footer { padding-top: 48px; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }
}

@media (max-width: 520px) {
  .nav-logo span { font-size: 18px; }
  .nav-logo svg { width: 32px; height: 32px; }
  .article-tools { align-items: stretch; }
  .article-share { justify-content: space-between; }
  .article-cta p { padding: 0 8px; }
}

/* roulang page: category2 */
:root{
  --bg:#F5F7FA;
  --panel:#FFFFFF;
  --text:#1F2933;
  --text-secondary:#5A6575;
  --border:#E4E9F0;
  --primary:#0D7A79;
  --primary-dark:#0A6463;
  --primary-deep:#0A5C5B;
  --accent:#E18A2F;
  --accent-hover:#D47920;
  --accent-soft:#FFF6EA;
  --success:#2E8B57;
  --warning:#C0392B;
  --disabled:#B0B7C3;
  --dark:#1F2933;
  --footer-bg:#17202A;
  --footer-border:#333E4D;
  --radius-btn:8px;
  --radius-card:10px;
  --radius-lg:14px;
  --shadow-sm:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --shadow-md:0 12px 24px rgba(16,24,40,.10);
  --shadow-panel:0 20px 40px rgba(16,24,40,.12);
  --container:1200px;
  --transition:150ms ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-head{margin-bottom:48px;max-width:720px}
.section-head.light{color:#fff}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--primary);
  background:rgba(13,122,121,.08);padding:4px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:.05em;
}
.section-head.light .eyebrow{background:rgba(255,255,255,.12);color:#9FD8D6}
.section-head h2{font-size:32px;line-height:1.3;font-weight:800;letter-spacing:-.01em}
.section-head p{margin-top:12px;color:var(--text-secondary);font-size:16px}
.section-head.light p{color:#B8C1CC}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:var(--transition);white-space:nowrap;
}
.btn svg{flex-shrink:0}
.btn:focus-visible{outline:2px solid #A8DADC;outline-offset:3px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn-download{background:var(--accent);color:var(--text)}
.btn-download:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-download:active{transform:translateY(0)}
.btn-outline{background:#fff;border:1px solid #C3CBD6;color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline-light{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.2);border-color:#fff}
.btn-lg{height:52px;padding:0 36px;font-size:16px}
.btn-disabled{background:var(--disabled);color:#fff;cursor:not-allowed;box-shadow:none}

.info-bar{background:var(--primary);color:#fff;font-size:13px;padding:8px 0}
.info-bar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.info-bar-close{color:rgba(255,255,255,.85);font-size:20px;line-height:1;padding:0 4px;transition:var(--transition)}
.info-bar-close:hover{color:#fff;transform:scale(1.15)}

.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 6px rgba(16,24,40,.04);
}
.nav{
  max-width:var(--container);margin:0 auto;height:68px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:0 24px;position:relative;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--text)}
.nav-logo svg{width:38px;height:38px;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:8px;height:100%}
.nav-links>li{height:100%;display:flex;align-items:center}
.nav-links>li>a{
  font-size:15px;font-weight:500;color:#3E4756;
  padding:0 14px;height:100%;display:flex;align-items:center;
  border-bottom:3px solid transparent;transition:var(--transition);
}
.nav-links>li>a:hover{color:var(--primary);border-bottom-color:rgba(13,122,121,.3)}
.nav-links>li.active>a{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;color:#3E4756;padding:8px 12px;border-radius:8px;transition:var(--transition);
}
.mega-trigger svg{width:14px;height:14px;transition:var(--transition)}
.mega-trigger:hover{color:var(--primary);background:rgba(13,122,121,.06)}
.mega-trigger[aria-expanded="true"] svg{transform:rotate(180deg)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 20px;
  background:var(--accent);color:var(--text);border-radius:var(--radius-btn);
  font-size:14px;font-weight:600;transition:var(--transition);
}
.nav-cta:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.nav-links-cta,.nav-links-more{display:none}

.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:10px;border-radius:8px}
.hamburger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}
.hamburger:hover{background:rgba(13,122,121,.06)}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mega-panel{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);
  width:720px;background:#fff;border-radius:12px;border:1px solid var(--border);
  box-shadow:var(--shadow-panel);overflow:hidden;
  opacity:0;visibility:hidden;transform:translateX(-50%) translateY(8px);
  transition:var(--transition);z-index:1001;
}
.mega-panel::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.mega-panel.open{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-inner{display:grid;grid-template-columns:2fr 3fr;gap:32px;padding:28px 32px 32px}
.mega-col h4{font-size:13px;font-weight:700;color:var(--text-secondary);margin-bottom:16px;letter-spacing:.06em}
.mega-card{
  display:flex;gap:14px;align-items:flex-start;padding:14px;border-radius:var(--radius-card);
  border:1px solid transparent;transition:var(--transition);margin-bottom:12px;
}
.mega-card:hover{border-color:var(--border);box-shadow:var(--shadow-sm);background:#FBFCFE}
.mega-card-icon{
  width:40px;height:40px;flex-shrink:0;border-radius:8px;display:flex;align-items:center;justify-content:center;
  background:rgba(13,122,121,.1);color:var(--primary);
}
.mega-card-title{font-size:15px;font-weight:600;color:var(--text)}
.mega-card-desc{font-size:13px;color:var(--text-secondary);line-height:1.5;margin-top:2px}
.mega-news{
  display:block;padding:14px 12px;border-radius:var(--radius-card);border:1px solid var(--border);
  margin-bottom:12px;transition:var(--transition);position:relative;
}
.mega-news:hover{box-shadow:var(--shadow-sm);border-color:var(--primary)}
.mega-tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--primary);
  background:rgba(13,122,121,.08);padding:2px 10px;border-radius:999px;margin-bottom:8px;
}
.mega-news-title{display:block;font-size:15px;font-weight:600;color:var(--text);line-height:1.4}
.mega-date{display:block;font-size:12px;color:var(--text-secondary);margin-top:6px}

.category-hero{
  background-size:cover;background-position:center;
  color:#fff;padding:96px 0;
}
.hero-badge{
  display:inline-block;font-size:13px;font-weight:600;color:#EAF7F6;
  background:rgba(13,122,121,.45);border:1px solid rgba(255,255,255,.35);
  padding:6px 18px;border-radius:999px;margin-bottom:20px;backdrop-filter:blur(4px);
}
.category-hero h1{font-size:44px;line-height:1.25;font-weight:800;max-width:720px;letter-spacing:-.02em}
.hero-subtitle{font-size:18px;color:rgba(255,255,255,.9);max-width:620px;margin-top:16px}
.hero-actions{display:flex;gap:16px;margin-top:32px;flex-wrap:wrap}
.hero-meta{
  display:flex;gap:24px;margin-top:36px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.78);
}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.hero-meta span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}

.highlights-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.highlight-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-sm);transition:var(--transition);
}
.highlight-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--primary)}
.highlight-card svg{width:36px;height:36px;color:var(--primary);margin-bottom:18px}
.highlight-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.highlight-card p{color:var(--text-secondary);font-size:15px;line-height:1.7}

.timeline-section{background:var(--dark);color:#E6EAF0;padding:80px 0}
.timeline{max-width:820px;margin:0 auto;position:relative;padding-left:32px}
.timeline::before{
  content:"";position:absolute;left:8px;top:6px;bottom:6px;
  width:2px;background:rgba(255,255,255,.14);
}
.timeline-item{
  position:relative;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-card);padding:28px 30px 28px 56px;margin-bottom:24px;transition:var(--transition);
}
.timeline-item:hover{border-color:var(--primary);background:rgba(255,255,255,.06)}
.timeline-badge{
  position:absolute;left:-26px;top:28px;width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--accent);color:#1F2933;font-size:13px;font-weight:700;
  border:3px solid var(--dark);box-shadow:0 0 0 2px rgba(225,138,47,.4);
}
.timeline-date{font-size:13px;color:#9FB6C4;font-weight:500;letter-spacing:.02em}
.timeline-item h3{font-size:20px;font-weight:700;color:#fff;margin:8px 0 14px}
.timeline-item ul li{
  position:relative;padding-left:20px;color:#C6D0DA;font-size:15px;line-height:1.7;margin-bottom:6px;
}
.timeline-item ul li::before{
  content:"";position:absolute;left:4px;top:10px;width:7px;height:7px;background:var(--primary);border-radius:1px;
}
.timeline-filter{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:36px;flex-wrap:wrap}
.timeline-filter span{color:#8FA3B3;font-size:14px;margin-right:8px}
.chip{
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);
  color:#D6DEE6;font-size:13px;font-weight:600;padding:6px 18px;border-radius:999px;
  transition:var(--transition);
}
.chip:hover{background:rgba(255,255,255,.14)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}

.scenario-section{background:var(--bg)}
.scenario-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;margin-bottom:64px}
.scenario-row.reverse .scenario-media{order:2}
.scenario-media img{width:100%;height:340px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}
.scenario-text h3{font-size:24px;font-weight:800;line-height:1.4;margin-bottom:16px}
.scenario-text p{color:var(--text-secondary);font-size:16px;line-height:1.8;margin-bottom:12px}
.text-link{color:var(--primary);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:4px;transition:var(--transition)}
.text-link:hover{gap:8px;color:var(--primary-dark)}

.faq-section{background:#fff}
.faq-layout{display:grid;grid-template-columns:340px 1fr;gap:64px}
.faq-head p{color:var(--text-secondary);margin-top:14px}
.faq-item{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-card);
  margin-bottom:12px;transition:var(--transition);
}
.faq-item:hover{border-color:var(--primary)}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;text-align:left;padding:18px 22px;font-size:16px;font-weight:600;color:var(--text);
  border-radius:var(--radius-card);transition:var(--transition);
}
.faq-question:hover{color:var(--primary)}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--text);transition:var(--transition)}
.faq-icon::before{width:14px;height:1.5px;top:9px;left:3px}
.faq-icon::after{width:1.5px;height:14px;top:3px;left:9px;transform:rotate(0)}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-item.open .faq-question{color:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-answer p{padding:0 22px 20px;color:var(--text-secondary);font-size:15px;line-height:1.75}
.faq-item.open .faq-answer{max-height:320px}

.download-cta{background:var(--primary-deep);color:#fff;padding:88px 0;text-align:center}
.download-cta h2{font-size:34px;font-weight:800;letter-spacing:-.01em}
.download-cta p{color:rgba(255,255,255,.85);margin-top:14px;max-width:680px;margin-left:auto;margin-right:auto;font-size:16px}
.download-buttons{display:flex;justify-content:center;gap:20px;margin-top:36px;flex-wrap:wrap}
.download-buttons .btn{min-width:190px}
.btn-ghost-light{
  background:transparent;border:1px solid rgba(255,255,255,.55);color:#fff;
}
.btn-ghost-light:hover{background:#fff;color:var(--accent-hover);border-color:#fff}
.cta-note{font-size:13px;color:rgba(255,255,255,.65);margin-top:22px}

.site-footer{background:var(--footer-bg);color:#A9B2BE;padding:64px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;
  border-bottom:1px solid var(--footer-border);
}
.footer-brand .nav-logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#A9B2BE;transition:var(--transition)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0;font-size:13px;color:#7E8A97;
}

@media (max-width:1023px){
  .section{padding:64px 0}
  .nav-links,.mega-trigger,.nav-cta{display:none}
  .hamburger{display:flex}
  .nav-links-cta,.nav-links-more{display:block}
  .nav.mobile-open .nav-links{
    display:flex;flex-direction:column;gap:0;
    position:absolute;top:68px;left:0;right:0;
    background:#fff;padding:12px 24px 20px;
    border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);
    height:auto;
  }
  .nav.mobile-open .nav-links>li{height:auto;width:100%}
  .nav.mobile-open .nav-links>li>a{
    height:48px;border-bottom:none;border-left:3px solid transparent;
    padding:0 12px;justify-content:flex-start;border-radius:8px;
  }
  .nav.mobile-open .nav-links>li>a:hover{border-left-color:var(--primary);background:rgba(13,122,121,.04)}
  .nav.mobile-open .nav-links>li.active>a{border-left-color:var(--primary);background:rgba(13,122,121,.06)}
  .nav.mobile-open .nav-links-cta{margin-top:12px}
  .nav.mobile-open .nav-links-cta>.nav-cta{width:100%;justify-content:center;height:44px}
  .nav.mobile-open .nav-links-cta>.nav-cta:hover{transform:none}
  .nav.mobile-open .nav-links-more>button{
    width:100%;justify-content:flex-start;height:48px;padding:0 12px;
    color:#3E4756;font-size:15px;border-radius:8px;
  }
  .nav.mobile-open .nav-links-more>button:hover{color:var(--primary);background:rgba(13,122,121,.06)}
  .mega-panel{
    position:fixed;top:68px;left:12px;right:12px;width:auto;
    transform:none;opacity:0;visibility:hidden;max-height:calc(100vh - 80px);overflow:auto;
  }
  .mega-panel.open{transform:none;opacity:1;visibility:visible}
  .mega-inner{grid-template-columns:1fr;gap:24px;padding:24px}
  .hero-actions .btn{flex:1}
  .timeline{padding-left:28px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .container{padding:0 18px}
  .category-hero{padding:72px 0}
  .category-hero h1{font-size:32px}
  .hero-subtitle{font-size:16px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .highlights-grid{grid-template-columns:1fr}
  .scenario-row{grid-template-columns:1fr;gap:32px}
  .scenario-row.reverse .scenario-media{order:0}
  .scenario-media img{height:220px}
  .download-buttons{flex-direction:column;align-items:stretch}
  .download-buttons .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column}
  .timeline{padding-left:20px}
  .timeline-badge{left:-20px;width:46px;height:46px;font-size:12px}
  .timeline-item{padding:22px 20px 22px 44px}
  .info-bar{font-size:12px}
}