/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;color:#2a2a35;background:#f7f8fa;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .2s ease}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* ===== Variables ===== */
:root{
  --c-dark:#1b1d28;
  --c-dark-2:#252836;
  --c-text:#3a3a48;
  --c-text-light:#7a7a88;
  --c-border:#e5e7eb;
  --c-accent:#d97333;
  --c-accent-light:#f0a060;
  --c-accent-dark:#b85c22;
  --c-bg:#f7f8fa;
  --c-white:#fff;
  --c-success:#2e8b57;
  --radius:6px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.06);
  --shadow-md:0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:0 8px 32px rgba(0,0,0,.12);
  --max-w:1140px;
}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--c-dark);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;color:#fff;letter-spacing:.5px}
.logo img{width:28px;height:28px}
.logo span{color:var(--c-accent-light)}
.main-nav{display:flex;gap:28px}
.main-nav a{font-size:14px;color:rgba(255,255,255,.7);font-weight:400;position:relative;padding:4px 0}
.main-nav a:hover,.main-nav a.active{color:#fff}
.main-nav a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--c-accent);border-radius:2px}
.header-cta{font-size:13px;padding:7px 18px;background:var(--c-accent);color:#fff;border-radius:var(--radius);font-weight:500;transition:background .2s}
.header-cta:hover{background:var(--c-accent-dark)}

/* ===== Hero ===== */
.hero{background:var(--c-dark);color:#fff;padding:56px 24px 64px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(217,115,51,.08) 0%,transparent 60%);pointer-events:none}
.hero-inner{max-width:var(--max-w);margin:0 auto;position:relative;z-index:1}
.breadcrumb{font-size:12px;color:rgba(255,255,255,.4);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.4)}
.breadcrumb a:hover{color:rgba(255,255,255,.7)}
.breadcrumb span{margin:0 6px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero h1{font-size:32px;font-weight:700;line-height:1.3;margin-bottom:16px;letter-spacing:-.5px}
.hero h1 .tag{display:inline-block;font-size:12px;background:rgba(217,115,51,.15);color:var(--c-accent-light);padding:3px 10px;border-radius:4px;margin-right:8px;vertical-align:middle;font-weight:500;letter-spacing:0}
.hero-desc{font-size:15px;color:rgba(255,255,255,.65);margin-bottom:28px;line-height:1.8}
.hero-meta{display:flex;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.hero-meta-item{display:flex;align-items:center;gap:6px;font-size:13px;color:rgba(255,255,255,.55)}
.hero-meta-item svg{width:14px;height:14px;flex-shrink:0}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-dl{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--c-accent);color:#fff;border-radius:var(--radius);font-size:14px;font-weight:600;transition:all .2s}
.btn-dl:hover{background:var(--c-accent-dark);transform:translateY(-1px);box-shadow:0 6px 20px rgba(217,115,51,.3)}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border:1px solid rgba(255,255,255,.15);color:#fff;border-radius:var(--radius);font-size:14px;font-weight:500;transition:all .2s}
.btn-ghost:hover{border-color:rgba(255,255,255,.3);background:rgba(255,255,255,.04)}
.hero-img{position:relative;border-radius:8px;overflow:hidden;box-shadow:0 12px 40px rgba(0,0,0,.3)}
.hero-img img{width:100%;border-radius:8px}

/* ===== Section Title ===== */
.section{padding:64px 24px}
.section-inner{max-width:var(--max-w);margin:0 auto}
.section-head{text-align:center;margin-bottom:40px}
.section-head h2{font-size:26px;font-weight:700;color:var(--c-dark);margin-bottom:10px}
.section-head p{font-size:14px;color:var(--c-text-light);max-width:600px;margin:0 auto}
.section-head .line{width:40px;height:3px;background:var(--c-accent);margin:12px auto 0;border-radius:2px}

/* ===== Features Grid ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--c-border);border-radius:8px;padding:28px 24px;transition:all .25s ease;position:relative;overflow:hidden}
.feature-card:hover{box-shadow:var(--shadow-md);border-color:transparent;transform:translateY(-2px)}
.feature-card .icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:rgba(217,115,51,.08);border-radius:10px;margin-bottom:16px}
.feature-card .icon svg{width:22px;height:22px;color:var(--c-accent)}
.feature-card h3{font-size:16px;font-weight:600;color:var(--c-dark);margin-bottom:8px}
.feature-card p{font-size:13px;color:var(--c-text-light);line-height:1.7}

/* ===== Info Bar ===== */
.info-bar{background:#fff;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);padding:24px}
.info-bar-inner{max-width:var(--max-w);margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.info-stat{display:flex;align-items:center;gap:10px}
.info-stat .num{font-size:22px;font-weight:700;color:var(--c-dark)}
.info-stat .num span{font-size:13px;font-weight:400;color:var(--c-text-light);margin-left:2px}
.info-stat .label{font-size:12px;color:var(--c-text-light)}
.info-stat .divider{width:1px;height:36px;background:var(--c-border)}

/* ===== Screenshots ===== */
.screenshots-section{background:var(--c-bg)}
.screenshots-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.screenshot-item{border-radius:8px;overflow:hidden;box-shadow:var(--shadow-sm);cursor:pointer;transition:all .3s ease;background:#fff;border:1px solid var(--c-border)}
.screenshot-item:hover{box-shadow:var(--shadow-lg);transform:scale(1.02)}
.screenshot-item img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ===== Content Layout ===== */
.content-area{display:grid;grid-template-columns:1fr 300px;gap:40px;max-width:var(--max-w);margin:0 auto;padding:48px 24px}
.content-main{min-width:0}
.content-main h2{font-size:22px;font-weight:700;color:var(--c-dark);margin:32px 0 14px;padding-bottom:10px;border-bottom:2px solid var(--c-border)}
.content-main h2:first-child{margin-top:0}
.content-main h3{font-size:17px;font-weight:600;color:var(--c-dark-2);margin:24px 0 10px}
.content-main p{font-size:14px;color:var(--c-text);line-height:1.85;margin-bottom:14px}
.content-main ul{margin-bottom:16px;padding-left:0}
.content-main ul li{font-size:14px;color:var(--c-text);line-height:1.8;padding-left:20px;position:relative;margin-bottom:6px}
.content-main ul li::before{content:'';position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.content-main img{border-radius:8px;margin:16px 0;box-shadow:var(--shadow-sm)}
.sidebar{position:sticky;top:80px;align-self:start}
.sidebar-card{background:#fff;border:1px solid var(--c-border);border-radius:8px;padding:24px;margin-bottom:20px}
.sidebar-card h4{font-size:14px;font-weight:600;color:var(--c-dark);margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--c-border)}
.sidebar-card .dl-info{font-size:13px;color:var(--c-text-light);line-height:1.8}
.sidebar-card .dl-info strong{color:var(--c-dark)}
.sidebar-dl-btn{display:block;text-align:center;padding:11px 20px;background:var(--c-accent);color:#fff;border-radius:var(--radius);font-size:14px;font-weight:600;margin-top:14px;transition:background .2s}
.sidebar-dl-btn:hover{background:var(--c-accent-dark)}
.toc-list li{margin-bottom:8px}
.toc-list a{font-size:13px;color:var(--c-text-light);display:block;padding:6px 10px;border-radius:4px;transition:all .2s}
.toc-list a:hover{background:rgba(217,115,51,.06);color:var(--c-accent-dark)}

/* ===== Download Cards ===== */
.download-section{background:#fff}
.dl-platforms{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.dl-card{border:1px solid var(--c-border);border-radius:8px;padding:28px 20px;text-align:center;transition:all .25s}
.dl-card:hover{box-shadow:var(--shadow-md);border-color:var(--c-accent-light)}
.dl-card .platform-icon{width:48px;height:48px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;background:var(--c-bg);border-radius:12px}
.dl-card .platform-icon svg{width:26px;height:26px;color:var(--c-dark)}
.dl-card h4{font-size:15px;font-weight:600;color:var(--c-dark);margin-bottom:4px}
.dl-card .version{font-size:12px;color:var(--c-text-light);margin-bottom:14px}
.dl-card .size{font-size:12px;color:var(--c-text-light);margin-bottom:14px}
.dl-card .dl-btns{display:flex;gap:8px;justify-content:center}
.dl-card .dl-btn{flex:1;max-width:110px;padding:8px 0;border:none;border-radius:var(--radius);font-size:12px;font-weight:600;cursor:pointer;color:#fff;transition:all .2s}
.dl-card .dl-btn.btn-quark{background:#3b5998}
.dl-card .dl-btn.btn-quark:hover{background:#2d4373}
.dl-card .dl-btn.btn-baidu{background:#06a7e1}
.dl-card .dl-btn.btn-baidu:hover{background:#0587b3}

/* Netdisk download box */
.netdisk-box{background:var(--c-bg);border:1px solid var(--c-border);border-radius:8px;padding:32px;margin-top:32px}
.netdisk-box h3{font-size:18px;font-weight:700;color:var(--c-dark);margin-bottom:6px}
.netdisk-box p.desc{font-size:13px;color:var(--c-text-light);margin-bottom:24px}
.netdisk-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.netdisk-item{background:#fff;border:1px solid var(--c-border);border-radius:8px;padding:24px;text-align:center;transition:all .25s}
.netdisk-item:hover{box-shadow:var(--shadow-md);border-color:var(--c-accent-light)}
.netdisk-item .nd-icon{font-size:28px;margin-bottom:12px}
.netdisk-item .nd-name{font-size:15px;font-weight:600;color:var(--c-dark);margin-bottom:4px}
.netdisk-item .nd-pwd{font-size:12px;color:var(--c-text-light);margin-bottom:8px;font-family:monospace}
.nd-qr{margin-top:4px}
.nd-qr img{width:130px;height:130px;display:block;margin:0 auto;border-radius:var(--radius);border:2px solid var(--c-border)}
.nd-qr span{display:block;font-size:12px;color:var(--c-text-light);margin-top:8px}

/* ===== FAQ ===== */
.faq-section{background:var(--c-bg)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--c-border);border-radius:8px;margin-bottom:12px;overflow:hidden;transition:box-shadow .2s}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-q{padding:18px 24px;font-size:15px;font-weight:600;color:var(--c-dark);cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-q .arrow{font-size:12px;color:var(--c-text-light);transition:transform .3s}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 24px 18px;font-size:14px;color:var(--c-text-light);line-height:1.8}
.faq-item.open .faq-a{max-height:300px}

/* ===== Version Table ===== */
.ver-table{width:100%;border-collapse:collapse;margin-top:20px;font-size:13px}
.ver-table th{background:var(--c-bg);text-align:left;padding:12px 16px;font-weight:600;color:var(--c-dark);border-bottom:2px solid var(--c-border)}
.ver-table td{padding:12px 16px;border-bottom:1px solid var(--c-border);color:var(--c-text)}
.ver-table tr:hover td{background:rgba(217,115,51,.03)}
.ver-table .tag-new{font-size:11px;background:#e8f5e9;color:#2e8b57;padding:2px 8px;border-radius:3px}

/* ===== Tutorial Steps ===== */
.steps{counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:28px;position:relative}
.step-item::before{counter-increment:step;content:counter(step);flex-shrink:0;width:36px;height:36px;background:var(--c-accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;z-index:1}
.step-item::after{content:'';position:absolute;left:17px;top:36px;bottom:-28px;width:2px;background:var(--c-border)}
.step-item:last-child::after{display:none}
.step-content h4{font-size:15px;font-weight:600;color:var(--c-dark);margin-bottom:6px}
.step-content p{font-size:14px;color:var(--c-text-light);line-height:1.7}

/* ===== Footer ===== */
.site-footer{background:var(--c-dark);color:rgba(255,255,255,.5);padding:40px 24px 24px;margin-top:0}
.footer-inner{max-width:var(--max-w);margin:0 auto}
.footer-nav{display:flex;justify-content:center;gap:32px;margin-bottom:24px;flex-wrap:wrap}
.footer-nav a{font-size:13px;color:rgba(255,255,255,.5)}
.footer-nav a:hover{color:#fff}
.footer-disclaimer{text-align:center;font-size:12px;color:rgba(255,255,255,.35);line-height:1.8;padding:20px 0;border-top:1px solid rgba(255,255,255,.06);margin-bottom:12px}
.footer-copy{text-align:center;font-size:12px;color:rgba(255,255,255,.3)}

/* ===== Responsive ===== */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-img{order:-1}
  .features-grid,.screenshots-grid,.dl-platforms{grid-template-columns:repeat(2,1fr)}
  .content-area{grid-template-columns:1fr}
  .sidebar{position:static}
  .netdisk-grid{grid-template-columns:1fr}
  .main-nav{display:none}
}
@media(max-width:560px){
  .hero h1{font-size:24px}
  .features-grid,.screenshots-grid,.dl-platforms{grid-template-columns:1fr}
  .section{padding:40px 16px}
  .hero{padding:40px 16px}
  .hero-meta{gap:12px}
  .hero-actions{flex-direction:column}
  .hero-actions a{text-align:center}
  .netdisk-box{padding:20px}
}

/* ===== Utilities ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.text-center{text-align:center}
.mt-0{margin-top:0}
.mt-2{margin-top:8px}
.mt-4{margin-top:16px}
.mt-8{margin-top:32px}
.mb-4{margin-bottom:16px}

/* ===== QR Modal ===== */
.qr-modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.6);z-index:10000;align-items:center;justify-content:center}
.qr-modal.active{display:flex}
.qr-modal-content{background:#fff;border-radius:12px;padding:32px 28px 24px;text-align:center;position:relative;max-width:320px;width:90%;box-shadow:0 12px 48px rgba(0,0,0,.25);animation:qrFadeIn .25s ease}
@keyframes qrFadeIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.qr-close{position:absolute;top:10px;right:14px;font-size:22px;color:#999;cursor:pointer;line-height:1;transition:color .2s}
.qr-close:hover{color:var(--c-dark)}
.qr-modal-title{font-size:15px;font-weight:600;color:var(--c-dark);margin-bottom:16px}
.qr-modal-img{width:200px;height:200px;display:block;margin:0 auto;border-radius:8px;border:2px solid var(--c-border)}
.qr-modal-tip{font-size:12px;color:var(--c-text-light);margin-top:12px}