/* ===== 变量 ===== */
:root{
  --primary:#6C5CE7;
  --primary-2:#5544D1;
  --primary-soft:#EFECFF;
  --accent:#FFA23E;
  --title:#282050;
  --text:#5A5480;
  --muted:#8B86AC;
  --border:#E9E6FA;
  --bg:#F8F7FE;
  --card:#FFFFFF;
  --radius:18px;
  --shadow:0 8px 24px rgba(108,92,231,.10);
  --shadow-hover:0 18px 40px rgba(108,92,231,.18);
  --nav-h:76px;
  --grad-brand:linear-gradient(135deg,var(--primary),#8F7BFF);
  --grad-deep:linear-gradient(135deg,#241B4E 0%,var(--primary) 60%,#7A66F5 100%);
}

/* ===== 基础 ===== */
*{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",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== 顶部导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.scrolled{border-color:var(--border);box-shadow:0 6px 24px rgba(33,26,69,.06)}
.nav-inner{max-width:1180px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 24px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--title);white-space:nowrap}
.logo-icon{width:36px;height:36px;border-radius:50%;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{font-size:15px;color:var(--text);padding:8px 12px;border-radius:10px;transition:.25s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-links a.active{font-weight:600}
.nav-cta{font-size:14px;font-weight:600;line-height:1;color:#fff;background:var(--primary);padding:10px 18px;border-radius:999px;transition:.25s;white-space:nowrap}
.nav-cta:hover{background:var(--primary-2);box-shadow:0 8px 20px rgba(108,92,231,.35);transform:translateY(-1px)}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;padding:14px 34px;border-radius:999px;transition:.3s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{color:#fff;background:var(--primary)}
.btn-primary:hover{background:var(--primary-2);box-shadow:0 12px 28px rgba(108,92,231,.35)}
.btn-ghost{color:var(--primary);background:var(--card);border:2px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-soft)}

/* ===== 区块标题 ===== */
.sec-head{text-align:center;max-width:660px;margin:0 auto 48px}
.sec-tag{display:inline-block;font-size:14px;font-weight:700;color:var(--primary);background:var(--primary-soft);padding:5px 16px;border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--title);line-height:1.3}
.sec-head p{font-size:16px;margin-top:12px}

/* ===== Hero ===== */
.hero{position:relative;padding:calc(var(--nav-h) + 60px) 0 90px;overflow:hidden;background:linear-gradient(180deg,#F0ECFF 0%,var(--bg) 100%)}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(60px);pointer-events:none}
.hero::before{width:420px;height:420px;background:rgba(108,92,231,.16);top:-120px;right:-80px}
.hero::after{width:360px;height:360px;background:rgba(255,162,62,.14);bottom:-120px;left:-100px}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:var(--primary-soft);color:var(--primary);border:1px solid #DDD6FF;font-size:14px;font-weight:600;padding:6px 16px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:50px;line-height:1.25;font-weight:800;color:var(--title);letter-spacing:.5px}
.ver-badge{display:inline-block;vertical-align:middle;margin-left:10px;font-size:18px;font-weight:700;color:#fff;background:var(--grad-brand);padding:4px 14px;border-radius:999px}
.hero-desc{font-size:17px;max-width:540px;margin:22px 0 32px}
.hero-btns{display:flex;gap:16px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:36px;font-size:14px;color:var(--title);font-weight:600}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--primary)}
.hero-img{position:relative}
.hero-img .frame{background:var(--card);border:1px solid var(--border);border-radius:24px;padding:12px;box-shadow:var(--shadow-hover)}
.hero-img img{width:100%;border-radius:16px}
.hero-float{position:absolute;left:-22px;bottom:26px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:12px 18px;box-shadow:var(--shadow)}
.hero-float b{display:block;font-size:16px;color:var(--primary);font-weight:800}
.hero-float span{font-size:12px;color:var(--muted)}

/* ===== 作品预览 ===== */
.works{padding:92px 0}
.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 .3s,box-shadow .3s}
.work-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%}
.work-info{padding:14px 18px 18px}
.work-info h3{font-size:17px;font-weight:700;color:var(--title)}
.work-info span{display:block;font-size:13px;color:var(--muted);margin-top:4px}

/* ===== 产品介绍 ===== */
.intro{padding:92px 0;background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.intro-body{max-width:820px;margin:0 auto;text-align:center}
.intro-body p{font-size:16px;margin-bottom:18px}
.intro-chips{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:34px}
.chip{background:var(--primary-soft);border:1px solid #DDD6FF;color:var(--primary);font-weight:600;font-size:14px;padding:9px 22px;border-radius:999px}

/* ===== 核心功能 ===== */
.features{padding:92px 0}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;transition:transform .3s,box-shadow .3s}
.feat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.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:18px}
.feat-card h3{font-size:18px;font-weight:700;color:var(--title);margin-bottom:8px}
.feat-card p{font-size:14.5px}

/* ===== 优势对比 ===== */
.compare{padding:92px 0;background:var(--card);border-top:1px solid var(--border)}
.compare-box{max-width:960px;margin:0 auto;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.compare-row{display:grid;grid-template-columns:150px 1fr 1fr}
.compare-row + .compare-row{border-top:1px solid var(--border)}
.compare-row > div{padding:16px 22px;display:flex;align-items:center;font-size:15px}
.compare-row > div + div{border-left:1px solid var(--border)}
.compare-head > div{font-weight:700;color:var(--title)}
.compare-row .c-label{color:var(--muted);font-size:14px;font-weight:600}
.compare-row .c-brand{background:rgba(108,92,231,.06);font-weight:700;color:var(--primary)}
.compare-row .c-other{color:var(--text)}
.c-badge{display:inline-block;margin-left:10px;font-size:12px;font-weight:600;color:#fff;background:var(--accent);padding:2px 10px;border-radius:999px;vertical-align:middle}

/* ===== 平台数据 ===== */
.data{padding:92px 0;background:var(--grad-deep);color:#fff}
.data .sec-tag{background:rgba(255,255,255,.16);color:#fff}
.data .sec-head h2{color:#fff}
.data .sec-head p{color:rgba(255,255,255,.85)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:var(--radius);padding:34px 20px;text-align:center}
.data-item .num{font-size:46px;font-weight:800;line-height:1.2}
.data-item .lbl{font-size:15px;font-weight:600;margin-top:6px}
.data-item .desc{font-size:13px;color:rgba(255,255,255,.8);margin-top:4px}

/* ===== 用户评价 ===== */
.reviews{padding:92px 0}
.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:24px;transition:transform .3s,box-shadow .3s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-ava{width:46px;height:46px;border-radius:50%;background:var(--grad-brand);color:#fff;font-weight:700;font-size:18px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.review-meta{flex:1}
.review-meta .name{font-weight:700;color:var(--title);font-size:15px}
.stars{color:#FFB03A;font-size:14px;letter-spacing:2px}
.review-card p{font-size:14.5px;line-height:1.8}

/* ===== 版本更新 ===== */
.version{padding:92px 0;background:var(--card);border-top:1px solid var(--border)}
.version-box{max-width:860px;margin:0 auto;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:36px 40px}
.version-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-bottom:22px;padding-bottom:22px;border-bottom:1px dashed var(--border)}
.version-top .v{font-size:26px;font-weight:800;color:var(--title)}
.version-top .v small{font-size:14px;color:var(--muted);font-weight:500;margin-left:10px}
.version-top .date{font-size:14px;color:var(--muted);background:var(--card);border:1px solid var(--border);padding:6px 16px;border-radius:999px}
.changelog li{position:relative;padding:9px 0 9px 26px;font-size:15px}
.changelog li::before{content:"";position:absolute;left:4px;top:18px;width:7px;height:7px;border-radius:50%;background:var(--primary)}

/* ===== FAQ ===== */
.faq{padding:92px 0}
.faq-list{max-width:840px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:16px;margin-bottom:14px;overflow:hidden;transition:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;background:none;border:none;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;color:var(--title);text-align:left}
.faq-icon{width:28px;height:28px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px;font-weight:600;transition:transform .3s}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-item.open .faq-a{max-height:320px}
.faq-a-inner{padding:0 24px 22px;font-size:15px}

/* ===== 下载区域 ===== */
.download{padding:96px 0;background:var(--grad-deep);color:#fff;text-align:center}
.download h1{font-size:42px;font-weight:800}
.download .ver-badge{margin-left:12px}
.dl-meta{margin:16px 0 34px;font-size:15px;color:rgba(255,255,255,.88)}
.dl-btns{display:flex;justify-content:center;gap:18px}
.btn-dl{display:inline-flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:var(--primary);background:#fff;padding:15px 36px;border-radius:999px;transition:.3s}
.btn-dl:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.25)}
.dl-tip{margin-top:28px;font-size:14px;color:rgba(255,255,255,.9)}

/* ===== 页脚 ===== */
.footer{background:#1B1538;color:rgba(255,255,255,.7);padding:34px 0;text-align:center;font-size:14px}
.footer a{color:#fff;font-weight:600}
.footer a:hover{color:#B9ADFF}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:26px;bottom:26px;z-index:90;width:46px;height:46px;border:none;border-radius:50%;background:var(--primary);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--primary-2)}

/* ===== 平板适配 ===== */
@media (max-width:1024px){
  .nav-inner{padding:0 20px}
  .nav-links a{font-size:14px;padding:8px 9px}
  .hero-inner{gap:40px}
  .hero h1{font-size:40px}
  .hero-desc{font-size:16px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .compare-row{grid-template-columns:110px 1fr 1fr}
  .compare-row > div{padding:14px 16px;font-size:14px}
}

/* ===== 移动端适配 ===== */
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-inner{padding:0 20px}
  .nav-links{display:none}
  .logo{font-size:20px}
  .hero{padding:calc(var(--nav-h) + 36px) 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:38px;text-align:center}
  .hero h1{font-size:32px}
  .ver-badge{font-size:15px;margin-left:8px}
  .hero-desc{margin-left:auto;margin-right:auto;font-size:15.5px}
  .hero-btns{flex-direction:column;gap:14px;max-width:420px;margin:0 auto}
  .btn{width:100%}
  .hero-points{justify-content:center;gap:10px 20px}
  .hero-float{left:12px;bottom:-18px}
  .sec-head h2{font-size:28px}
  .sec-head p{font-size:15px}
  .works{padding:72px 0}
  .works-grid{grid-template-columns:1fr;gap:22px}
  .features-grid,.reviews-grid{grid-template-columns:1fr}
  .intro,.features,.compare,.data,.reviews,.version,.faq{padding:72px 0}
  .compare-row{grid-template-columns:86px 1fr 1fr}
  .compare-row > div{padding:12px 12px;font-size:13px}
  .compare-row .c-label{font-size:12.5px}
  .c-badge{margin-left:6px;padding:2px 8px;font-size:11px}
  .data-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .data-item{padding:26px 14px}
  .data-item .num{font-size:36px}
  .version-box{padding:26px 20px}
  .version-top .v{font-size:22px}
  .faq-q{padding:18px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 20px}
  .download{padding:76px 0}
  .download h1{font-size:30px}
  .dl-meta{margin:14px 0 28px;font-size:13px;white-space:nowrap}
  .dl-btns{flex-direction:column;gap:14px;max-width:420px;margin:0 auto}
  .btn-dl{width:100%;font-size:15px;padding:14px 24px}
  .dl-tip{font-size:13px;line-height:1.8}
  .back-top{right:16px;bottom:16px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}