:root{
  --primary:#7B5CFF;
  --primary-dark:#5B3FE8;
  --primary-soft:#EFEBFF;
  --dark:#1B1533;
  --dark-2:#251D47;
  --bg:#F7F6FC;
  --card:#FFFFFF;
  --border:#E9E6F5;
  --text:#262233;
  --text-2:#57516E;
  --star:#FFB400;
  --good:#16A34A;
  --warn:#D97706;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 8px 24px rgba(27,21,51,.08);
  --shadow-hover:0 16px 34px rgba(123,92,255,.20);
  --maxw:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:15px;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{font-family:inherit}
.wrap{max-width:var(--maxw);margin:0 auto}
.grad-text{background:linear-gradient(135deg,var(--primary),var(--primary-dark));-webkit-background-clip:text;background-clip:text;color:transparent}
section{padding:84px 24px;scroll-margin-top:76px}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:99;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 24px;height:64px}
.logo{font-size:20px;font-weight:800;flex-shrink:0}
.nav-menu{display:flex;align-items:center;gap:22px;font-size:13.5px;color:var(--text-2)}
.nav-menu a{transition:color .2s}
.nav-menu a:hover{color:var(--primary)}
.btn-nav{font-size:13px;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:8px 18px;border-radius:999px;box-shadow:0 6px 14px rgba(123,92,255,.32);transition:transform .2s,box-shadow .2s;flex-shrink:0}
.btn-nav:hover{transform:translateY(-1px);box-shadow:0 10px 20px rgba(123,92,255,.40)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;font-weight:600;border-radius:999px;padding:14px 34px;font-size:15px;transition:transform .2s,box-shadow .2s}
.btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-dark));box-shadow:0 10px 24px rgba(123,92,255,.35)}
.btn-light{color:var(--primary-dark);background:#fff;border:1.5px solid var(--border);box-shadow:0 8px 20px rgba(27,21,51,.08)}
.btn:hover{transform:translateY(-2px)}
.btn-primary:hover{box-shadow:0 14px 30px rgba(123,92,255,.45)}

/* 首屏 Hero */
.hero{background:radial-gradient(640px 420px at 88% 18%,rgba(123,92,255,.14),transparent 62%),radial-gradient(520px 380px at 6% 92%,rgba(255,180,0,.10),transparent 60%),var(--bg)}
.hero-inner{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;font-weight:800}
.ver{display:inline-block;margin-left:6px;font-size:.55em;font-weight:700;color:var(--primary);background:var(--primary-soft);border:1px solid rgba(123,92,255,.25);padding:4px 12px;border-radius:999px;vertical-align:middle}
.hero-desc{margin:18px 0 30px;color:var(--text-2);font-size:16px;max-width:560px}
.hero-btns,.download-btns{display:flex;gap:16px}
.hero-poster{background:linear-gradient(160deg,var(--primary-soft),#fff);border:1px solid var(--border);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.hero-poster img{width:100%;height:auto;border-radius:var(--radius-sm)}

/* 模块标题 */
.sec-head{text-align:center;margin-bottom:44px}
.sec-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;color:var(--primary);background:var(--primary-soft);padding:4px 14px;border-radius:999px;margin-bottom:12px}
.sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:800}
.sec-head p{margin-top:10px;color:var(--text-2)}

/* 作品预览 */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.work-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%;height:auto}

/* 产品介绍 */
.intro-body{max-width:820px;margin:0 auto;font-size:16px;color:var(--text-2)}
.intro-body p+p{margin-top:14px}
.intro-chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:28px}
.intro-chips span{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:8px 18px;font-size:14px;font-weight:600;color:var(--text);box-shadow:var(--shadow)}

/* 核心功能 */
.features{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease,background .25s ease}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);background:var(--card)}
.feat-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-icon svg{width:26px;height:26px}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-2)}

/* 优势对比 */
.cmp-table{width:100%;table-layout:fixed;border-collapse:collapse;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.cmp-table th,.cmp-table td{padding:16px 20px;text-align:left;font-size:14px}
.cmp-table thead th{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:15px}
.cmp-table tbody tr{border-top:1px solid var(--border)}
.cmp-table tbody td:first-child{font-weight:600}
.good{color:var(--good)}
.bad{color:var(--warn)}

/* 平台数据 */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.data-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px 20px;text-align:center;box-shadow:var(--shadow)}
.data-item .num{font-size:clamp(26px,3vw,40px);font-weight:800;line-height:1.2}
.data-item .label{margin-top:8px;color:var(--text-2);font-size:14px}

/* 用户评价 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:17px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.review-user .name{font-size:14px;font-weight:700}
.stars{color:var(--star);font-size:13px;letter-spacing:2px;margin-top:2px}
.review-text{font-size:14px;color:var(--text-2)}

/* 版本更新 */
.version-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow);display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:start}
.version-head{display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.version-badge{font-size:15px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:10px 20px;border-radius:12px;box-shadow:0 8px 18px rgba(123,92,255,.35);white-space:nowrap}
.version-head h3{font-size:19px;font-weight:800}
.version-head p{font-size:13px;color:var(--text-2)}
.version-log{list-style:none}
.version-log li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;font-size:14.5px;color:var(--text-2);border-bottom:1px dashed var(--border)}
.version-log li:last-child{border-bottom:none}
.tag{flex-shrink:0;font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px;margin-top:2px}
.tag-new{color:var(--primary-dark);background:var(--primary-soft)}
.tag-opt{color:var(--good);background:#E9F7EF}
.tag-fix{color:var(--warn);background:#FDF3E3}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;background:none;border:none;cursor:pointer;font-size:15.5px;font-weight:700;color:var(--text);text-align:left}
.faq-icon{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px;transition:transform .3s ease}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-a p{padding:0 22px 20px;color:var(--text-2);font-size:14.5px}

/* 下载区域 */
.download{background:radial-gradient(700px 460px at 50% 0%,rgba(123,92,255,.35),transparent 65%),linear-gradient(160deg,var(--dark-2),var(--dark));color:#fff;text-align:center}
.download h1{font-size:clamp(26px,3.4vw,40px);font-weight:800}
.download .ver{color:#fff;background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.25)}
.dl-meta{margin:14px 0 30px;font-size:13.5px;color:#C9C2E8}
.download-btns{justify-content:center}
.btn-dl{color:var(--primary-dark);background:#fff;font-weight:700;box-shadow:0 12px 28px rgba(0,0,0,.25)}
.dl-tip{margin-top:22px;font-size:14px;color:#C9C2E8}

/* 页脚 */
.footer{background:var(--dark);color:#B9B3D4;text-align:center;padding:34px 20px;font-size:13px}
.footer a{color:#E4E0F7}

/* 返回顶部 */
.back-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-size:18px;cursor:pointer;box-shadow:0 10px 22px rgba(123,92,255,.42);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s;z-index:98}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

.btn:focus-visible,.faq-q:focus-visible,.btn-nav:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* 平板 */
@media (max-width:1024px){
  .nav-menu{display:none}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
}

/* 手机 */
@media (max-width:768px){
  section{padding:60px 20px}
  .nav-inner{padding:0 20px;height:58px}
  .logo,.btn-nav{display:flex;align-items:center;min-height:44px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-text{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-btns,.download-btns{flex-direction:column}
  .hero-btns .btn,.download-btns .btn{width:100%}
  .hero-poster{max-width:340px;margin:0 auto}
  .version-card{grid-template-columns:1fr;gap:24px;padding:28px 22px}
  .cmp-table th,.cmp-table td{padding:12px 10px;font-size:12.5px}
  .cmp-table thead th{font-size:13px}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .dl-meta{font-size:11px;white-space:nowrap}
  .back-top{right:16px;bottom:20px}
}

@media (max-width:600px){
  .works-grid,.features-grid,.reviews-grid{grid-template-columns:1fr}
  .sec-head{margin-bottom:32px}
  .btn{padding:13px 24px}
}