:root{
  --primary:#FF6A00;
  --primary-2:#FF8E3C;
  --primary-dark:#E85D00;
  --primary-bg:#FFF4EC;
  --dark:#0F172A;
  --dark-2:#1B2A41;
  --bg:#F7F9FC;
  --card:#FFFFFF;
  --border:#E6EAF1;
  --text:#1F2937;
  --text-2:#4B5563;
  --text-3:#6B7280;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 8px 24px rgba(15,23,42,.06);
  --shadow-hover:0 16px 36px rgba(15,23,42,.13);
  --header-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 8px)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;width:100%;height:auto}
ul{list-style:none}
button{font-family:inherit}
::selection{background:var(--primary);color:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 6px 20px rgba(15,23,42,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--dark);transition:color .2s}
.logo:hover{color:var(--primary)}
.logo-icon{width:24px;height:24px;fill:var(--primary)}
.nav{display:flex;align-items:center;gap:18px}
.nav a{position:relative;font-size:15px;color:var(--text-2);white-space:nowrap;transition:color .2s}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;background:var(--primary);transform:scaleX(0);transition:transform .25s}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}

.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:600;white-space:nowrap;transition:transform .25s,box-shadow .25s,background .25s}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 6px 18px rgba(255,106,0,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,106,0,.38)}
.btn-secondary{background:var(--card);color:var(--primary-dark);border:2px solid var(--primary)}
.btn-secondary:hover{background:var(--primary-bg);transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,106,0,.18)}
.btn-sm{height:30px;padding:0 14px;font-size:13px}
.btn-lg{height:52px;padding:0 32px;font-size:17px}

.section{padding:88px 0}
.section-alt{background:var(--card)}
.section h2{font-size:34px;font-weight:800;text-align:center;color:var(--dark);letter-spacing:.5px}
.section-sub{text-align:center;color:var(--text-2);font-size:15.5px;margin:12px auto 44px;max-width:640px}

.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 55%,#24385A 100%);color:#fff;padding:calc(var(--header-h) + 56px) 0 84px}
.hero::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(255,106,0,.28),transparent 65%);top:-160px;right:-120px}
.hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,142,60,.16),transparent 65%);bottom:-180px;left:-140px}
.hero-inner{position:relative;display:flex;align-items:center;gap:64px}
.hero-text{flex:1}
.hero h1{font-size:52px;font-weight:800;line-height:1.15;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.version-badge{display:inline-block;padding:5px 14px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-size:17px;font-weight:700;letter-spacing:1px;box-shadow:0 6px 16px rgba(255,106,0,.35)}
.hero-desc{font-size:18px;line-height:1.8;color:rgba(255,255,255,.86);margin:22px 0 38px;max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-poster{flex:0 0 340px;position:relative}
.hero-poster::before{content:"";position:absolute;right:-16px;bottom:-16px;width:110px;height:110px;border-radius:22px;background:linear-gradient(135deg,var(--primary),var(--primary-2));z-index:0}
.hero-poster img{position:relative;z-index:1;border-radius:24px;border:4px solid rgba(255,255,255,.14);box-shadow:0 28px 64px rgba(0,0,0,.45)}

.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:12px;transition:transform .25s,box-shadow .25s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card img{border-radius:calc(var(--radius) - 5px)}

.about-content{max-width:880px;margin:0 auto}
.about-content>p{font-size:16.5px;color:var(--text-2);line-height:1.9;margin-bottom:18px}
.about-points{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:42px}
.about-point{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;transition:transform .25s,box-shadow .25s}
.about-point:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.about-point h3{font-size:17px;color:var(--dark);display:flex;align-items:center;gap:8px}
.about-point h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary);flex:none}
.about-point p{font-size:14.5px;color:var(--text-2);margin-top:10px;line-height:1.75}

.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feature-icon{display:flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:14px;background:var(--primary-bg);margin-bottom:16px}
.feature-icon svg{width:25px;height:25px;stroke:var(--primary);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.feature-card h3{font-size:17.5px;color:var(--dark);font-weight:700}
.feature-card p{font-size:14.5px;color:var(--text-2);margin-top:9px;line-height:1.75}

.table-scroll{overflow-x:auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);-webkit-overflow-scrolling:touch}
.compare-table{width:100%;min-width:640px;table-layout:fixed;border-collapse:collapse}
.compare-table th,.compare-table td{padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--border);vertical-align:middle}
.compare-table thead th{background:var(--dark);color:#fff;font-size:16px;font-weight:700}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr{transition:background .2s}
.compare-table tbody tr:hover{background:var(--primary-bg)}
.compare-table tbody tr:hover td:nth-child(2){background:#FFEBD8}
.compare-table td:first-child{font-weight:600;color:var(--dark)}
.compare-table td:nth-child(2){background:var(--primary-bg);color:var(--primary-dark);font-weight:600}
.table-tip{display:none;text-align:center;color:var(--text-3);font-size:13px;margin-top:14px}

.section-dark{background:linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 100%);color:#fff}
.section-dark h2{color:#fff}
.section-dark .section-sub{color:rgba(255,255,255,.7)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:34px 22px;text-align:center;transition:transform .25s,background .25s}
.data-item:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.data-item strong{display:block;font-size:42px;font-weight:800;line-height:1.15;background:linear-gradient(135deg,#FFB35C,var(--primary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:var(--primary-2)}
.data-item span{display:block;margin-top:10px;font-size:15px;color:rgba(255,255,255,.75)}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.review-avatar{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-size:19px;font-weight:700;flex:none}
.review-info .review-name{display:block;font-size:15.5px;font-weight:700;color:var(--dark)}
.review-stars{display:block;margin-top:3px;font-size:14px;letter-spacing:2.5px;color:#FFB400}
.review-text{font-size:14.5px;color:var(--text-2);line-height:1.8}

.version-card{max-width:880px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:38px;transition:transform .25s,box-shadow .25s}
.version-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.version-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--border);margin-bottom:22px}
.version-no{font-size:24px;font-weight:800;color:var(--primary-dark);background:var(--primary-bg);padding:6px 18px;border-radius:12px;letter-spacing:.5px}
.version-date{font-size:14.5px;color:var(--text-3)}
.version-log li{position:relative;padding:9px 0 9px 26px;font-size:15px;color:var(--text-2);line-height:1.7}
.version-log li::before{content:"";position:absolute;left:5px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:880px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s,border-color .25s}
.faq-item.open{border-color:var(--primary);box-shadow:var(--shadow)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:16.5px;font-weight:600;color:var(--dark);text-align:left}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .3s}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.open .faq-icon::after{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--text-2);line-height:1.85}

.download{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 100%);color:#fff;padding:96px 0;text-align:center}
.download::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,106,0,.25),transparent 65%);top:-160px;left:50%;transform:translateX(-50%)}
.download h1{position:relative;font-size:44px;font-weight:800;display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.download h1 .version-badge{font-size:20px;padding:6px 16px}
.download-meta{position:relative;margin:20px 0 36px;color:rgba(255,255,255,.72);font-size:15px;white-space:nowrap}
.download-btns{position:relative;display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.download-tip{position:relative;margin-top:30px;color:rgba(255,255,255,.78);font-size:15px}

.footer{background:var(--dark);border-top:1px solid rgba(255,255,255,.08);color:rgba(255,255,255,.62);padding:30px 0;font-size:14px}
.footer .container{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px}
.footer-link{color:rgba(255,255,255,.85)}
.footer-link:hover{color:var(--primary-2)}

.back-top{position:fixed;right:24px;bottom:28px;z-index:99;display:flex;align-items:center;justify-content:center;width:46px;height:46px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;cursor:pointer;box-shadow:0 10px 24px rgba(255,106,0,.35);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-3px)}
.back-top svg{width:20px;height:20px}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
}

@media (max-width:1024px){
  .hero h1{font-size:44px}
  .hero-inner{gap:40px}
  .hero-poster{flex:0 0 300px}
  .nav{gap:14px}
  .nav a{font-size:14px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{gap:18px}
  .data-item strong{font-size:36px}
}
@media (max-width:920px){
  .nav{display:none}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section h2{font-size:26px}
  .section-sub{margin:10px auto 32px;font-size:14.5px}
  .hero{padding:calc(var(--header-h) + 36px) 0 52px}
  .hero-inner{flex-direction:column;gap:34px;text-align:center}
  .hero h1{font-size:32px;justify-content:center}
  .hero-desc{font-size:15.5px;margin:16px auto 26px}
  .hero-btns{flex-direction:column;width:100%;gap:12px}
  .hero-btns .btn{width:100%}
  .hero-poster{flex:none;width:225px;margin:0 auto}
  .hero-poster::before{right:-12px;bottom:-12px;width:84px;height:84px}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .features-grid{grid-template-columns:1fr;gap:18px}
  .about-points{grid-template-columns:1fr;gap:16px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .data-item{padding:26px 16px}
  .data-item strong{font-size:28px}
  .data-item span{font-size:14px}
  .reviews-grid{grid-template-columns:1fr;gap:18px}
  .table-tip{display:block}
  .compare-table th,.compare-table td{padding:13px 14px;font-size:14px}
  .version-card{padding:24px 20px}
  .version-head{flex-direction:column;align-items:flex-start}
  .version-no{font-size:20px}
  .version-log li{font-size:14px}
  .faq-q{font-size:15.5px;padding:17px 18px}
  .faq-a p{padding:0 18px 18px;font-size:14.5px}
  .download{padding:72px 0}
  .download h1{font-size:28px}
  .download-meta{font-size:12.5px;margin:16px 0 28px}
  .download-btns{flex-direction:column;width:100%;gap:12px}
  .download-btns .btn{width:100%}
  .download-tip{font-size:14px;margin-top:24px}
  .back-top{right:16px;bottom:22px}
}
@media (max-width:360px){
  .download-meta{font-size:11px}
}