:root{
  --primary:#FFB400;
  --primary-2:#FF8A00;
  --primary-soft:#FFF4D6;
  --dark:#241A0F;
  --dark-2:#4A3418;
  --text:#262019;
  --text-2:#6E6457;
  --border:#F2E7CF;
  --bg:#FFFDF6;
  --card:#FFFFFF;
  --shadow:0 12px 30px rgba(255,160,0,.12);
  --shadow-hover:0 18px 40px rgba(255,140,0,.18);
  --grad:linear-gradient(135deg,var(--primary),var(--primary-2));
  --radius:16px;
  --nav-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 12px)}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;font-size:15px}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:none;cursor:pointer}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
h2{font-size:34px;text-align:center;line-height:1.35}
.sec-sub{text-align:center;color:var(--text-2);margin:10px 0 44px;font-size:15px}
.ic{display:inline-flex;color:var(--primary-2)}

.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}

/* 导航栏 */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);background:rgba(255,253,246,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:100;transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 4px 20px rgba(90,60,10,.08)}
.nav-inner{max-width:1200px;margin:0 auto;height:100%;display:flex;align-items:center;gap:24px;padding:0 24px}
.logo{font-size:22px;font-weight:800;white-space:nowrap;letter-spacing:1px}
.logo-hl{color:var(--primary-2)}
.menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.menu a{font-size:14px;padding:6px 12px;border-radius:8px;color:var(--text-2);transition:color .2s,background .2s;white-space:nowrap}
.menu a:hover{color:var(--primary-2);background:var(--primary-soft)}
.menu a.active{color:var(--primary-2);background:var(--primary-soft);font-weight:600}
.nav-btn{margin-left:14px;font-size:13px;font-weight:600;padding:6px 16px;border-radius:999px;background:var(--grad);color:#fff;white-space:nowrap;transition:transform .2s,box-shadow .2s}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(255,140,0,.35)}

/* Hero */
.hero{background:linear-gradient(180deg,#FFF6DE 0%,var(--bg) 100%);padding:calc(var(--nav-h) + 46px) 0 64px}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;background:var(--primary-soft);color:#8A5A00;font-size:14px;font-weight:600;padding:6px 16px;border-radius:999px;margin-bottom:18px;border:1px solid #FFE3A6}
.hero h1{font-size:44px;line-height:1.3;font-weight:800}
.hero h1 .ver,.download h1 .ver{display:inline-block;background:var(--grad);color:#fff;font-size:21px;padding:5px 16px;border-radius:12px;vertical-align:middle;margin-left:10px;font-weight:700;letter-spacing:1px}
.hero p{color:var(--text-2);font-size:17px;margin:20px 0 32px;max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:999px;font-size:16px;font-weight:600;background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(255,140,0,.28);transition:transform .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(255,140,0,.38)}
.btn-ghost{background:#fff;color:var(--primary-2);border:2px solid var(--primary-2);box-shadow:none}
.btn-ghost:hover{background:var(--primary-soft)}
.hero-img{display:flex;justify-content:center}
.hero-img img{width:100%;max-width:380px;border-radius:var(--radius);box-shadow:var(--shadow-hover)}

/* 作品预览 */
.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);overflow:hidden;transition:transform .25s,box-shadow .25s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%}
.work-cap{padding:14px 16px 16px}
.work-cap b{font-size:15px;display:block}
.work-cap span{font-size:14px;color:var(--text-2)}

/* 产品介绍 */
.about-inner{max-width:960px;margin:0 auto}
.about-lead{font-size:16.5px;color:var(--text-2);text-align:center;margin-bottom:40px}
.about-points{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;list-style:none}
.about-points li{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 20px;text-align:center;transition:transform .25s,box-shadow .25s}
.about-points li:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.about-points .ic{margin-bottom:12px}
.about-points b{font-size:16px;display:block;margin-bottom:6px}
.about-points li span:last-child{font-size:14px;color:var(--text-2)}

/* 核心功能 */
.features{background:var(--card)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.f-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:32px 26px;transition:transform .25s,box-shadow .25s,background .25s}
.f-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);background:var(--card)}
.f-card .ic{margin-bottom:6px}
.f-card h3{font-size:18px;margin:14px 0 8px}
.f-card p{font-size:14.5px;color:var(--text-2)}

/* 优势对比 */
.compare-table{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--card);max-width:900px;margin:0 auto}
.c-row{display:grid;grid-template-columns:1fr 1.25fr 1.25fr}
.c-row + .c-row{border-top:1px solid var(--border)}
.c-cell{padding:16px 20px;font-size:15px}
.c-head{background:var(--dark);color:#fff}
.c-head .c-cell{font-weight:600;font-size:16px}
.c-name{font-weight:600;color:var(--text-2);background:#FFFBF0}
.c-good{background:var(--primary-soft);font-weight:600;color:#7A4F00}

/* 平台数据 */
.data{background:linear-gradient(135deg,var(--dark),var(--dark-2))}
.data h2{color:#fff}
.data .sec-sub{color:rgba(255,255,255,.72)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{text-align:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:36px 16px;transition:transform .25s,background .25s}
.data-item:hover{transform:translateY(-4px);background:rgba(255,255,255,.11)}
.data-item b{font-size:38px;font-weight:800;display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.data-item span{color:rgba(255,255,255,.8);font-size:15px}

/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.r-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:transform .25s,box-shadow .25s}
.r-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.r-top{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.r-avatar{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;font-size:18px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.r-name{font-weight:600;font-size:15px}
.r-stars{color:var(--primary);font-size:14px;letter-spacing:2px;margin-bottom:10px}
.r-comment{font-size:14.5px;color:var(--text-2)}

/* 版本更新 */
.version-card{max-width:820px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px}
.v-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:20px;margin-bottom:18px;border-bottom:1px solid var(--border)}
.v-badge{background:var(--grad);color:#fff;font-weight:700;font-size:20px;padding:6px 18px;border-radius:12px;letter-spacing:1px}
.v-time{color:var(--text-2);font-size:15px}
.v-log{list-style:none}
.v-log li{position:relative;padding:9px 0 9px 28px;font-size:15px}
.v-log li::before{content:"";position:absolute;left:4px;top:16px;width:10px;height:10px;border-radius:50%;background:var(--grad)}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;transition:border-color .25s,box-shadow .25s}
.faq-item.open{border-color:#FFD98A;box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;background:none;padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);text-align:left}
.faq-icon{width:26px;height:26px;flex-shrink:0;position:relative;border-radius:50%;background:var(--primary-soft);transition:transform .3s,background .3s}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary-2);border-radius:2px;top:50%;left:50%;transform:translate(-50%,-50%)}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary-2)}
.faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 24px 22px;color:var(--text-2);font-size:15px}

/* 下载区域 */
.download{background:linear-gradient(135deg,var(--dark),#5A3D12);text-align:center}
.download h1{font-size:38px;color:#fff}
.download h1 .ver{font-size:22px}
.dl-meta{color:rgba(255,255,255,.75);font-size:15px;margin:16px 0 32px}
.dl-btns{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.btn-big{padding:16px 40px;font-size:17px}
.btn-ghost-dark{background:rgba(255,255,255,.08);color:#fff;border:2px solid rgba(255,255,255,.45);box-shadow:none}
.btn-ghost-dark:hover{background:rgba(255,255,255,.16)}
.dl-tip{margin-top:30px;color:#FFD98A;font-size:15px}

/* 页脚 */
.footer{background:var(--dark);color:rgba(255,255,255,.6);text-align:center;padding:30px 0;font-size:14px}
.footer a{color:var(--primary)}
.footer a:hover{color:#FFD24D}
.footer-tip{margin-top:6px;font-size:13px;color:rgba(255,255,255,.42)}

/* 返回顶部 */
.to-top{position:fixed;right:28px;bottom:32px;width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(255,140,0,.35);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-3px)}

/* 平板 */
@media (max-width:992px){
  .menu{display:none}
  .nav-btn{margin-left:auto}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-text{text-align:center}
  .hero p{margin-left:auto;margin-right:auto}
  .hero-btns{justify-content:center}
  .hero-img img{max-width:300px}
  .works-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .about-points{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .reviews-grid{grid-template-columns:repeat(2,1fr);gap:20px}
}

/* 手机 */
@media (max-width:640px){
  .container{padding:0 20px}
  .nav-inner{padding:0 20px}
  .logo{display:inline-flex;align-items:center;min-height:44px}
  .nav-btn{min-height:44px;display:inline-flex;align-items:center}
  .section{padding:52px 0}
  h2{font-size:26px}
  .sec-sub{font-size:14px;margin:10px 0 32px}
  .hero{padding:calc(var(--nav-h) + 30px) 0 44px}
  .hero h1{font-size:30px}
  .hero h1 .ver{font-size:16px;padding:4px 12px;margin-left:8px}
  .hero p{font-size:15px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .about-lead{font-size:15px}
  .about-points{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .c-cell{padding:12px 8px;font-size:13px}
  .c-head .c-cell{font-size:14px}
  .data-item{padding:28px 10px}
  .data-item b{font-size:30px}
  .data-item span{font-size:14px}
  .reviews-grid{grid-template-columns:1fr}
  .version-card{padding:24px 20px}
  .v-badge{font-size:17px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px;font-size:14px}
  .download h1{font-size:28px}
  .download h1 .ver{font-size:16px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;width:100%}
  .dl-btns .btn{width:100%}
  .btn-big{padding:14px 20px;font-size:15px}
  .dl-tip{font-size:14px}
  .to-top{right:16px;bottom:24px;width:42px;height:42px}
}