*,*::before,*::after{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;line-height:1.6;color:#333;background:#fff}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}

.wrap{max-width:1060px;margin:0 auto;padding:0 20px}

/* ── 导航栏 ─────────────────────────────────── */
.header{background:#fff;border-bottom:1px solid #eee;position:sticky;top:0;z-index:50}
.header-bar{display:flex;justify-content:space-between;align-items:center;height:56px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600;color:#222}
.logo img{width:32px;height:32px;border-radius:6px}
.nav{display:flex;gap:28px}
.nav a{font-size:15px;color:#555;transition:color .15s}
.nav a:hover{color:#e8582a}

/* ── 通用按钮 ────────────────────────────────── */
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:15px;font-weight:500;transition:transform .15s,box-shadow .15s}
.btn-main{background:#e8582a;color:#fff}
.btn-main:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(232,88,42,.35);color:#fff}
.btn-alt{background:#fff;color:#e8582a;border:1.5px solid #e8582a}
.btn-alt:hover{background:#e8582a;color:#fff;transform:translateY(-1px)}

/* ── 首页 Hero ───────────────────────────────── */
.hero{padding:72px 0 64px;background:linear-gradient(135deg,#faf8f6 0%,#f2eeea 100%)}
.hero h1{font-size:38px;font-weight:700;color:#1a1a1a;line-height:1.3;margin-bottom:16px}
.hero-sub{font-size:17px;color:#666;line-height:1.75;margin-bottom:28px;max-width:640px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.hero-tip{font-size:13px;color:#aaa}

/* ── 用户评价 ────────────────────────────────── */
.reviews{padding:64px 0;background:#fff}
.sec-title{font-size:26px;font-weight:700;color:#1a1a1a;text-align:center;margin-bottom:36px}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:#fafafa;border:1px solid #f0f0f0;border-radius:10px;padding:24px 22px;transition:box-shadow .2s}
.review-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.05)}
.review-stars{color:#f5a623;font-size:15px;letter-spacing:2px;margin-bottom:12px}
.review-text{font-size:14px;color:#555;line-height:1.8;margin-bottom:18px}
.review-user{display:flex;align-items:center;gap:10px}
.review-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover}
.review-name{font-size:14px;font-weight:600;color:#222}
.review-meta{font-size:12px;color:#aaa}

/* ── 知识卡片 ────────────────────────────────── */
.knowledge{padding:64px 0 72px;background:#f7f7f5}
.know-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.know-card{background:#fff;border:1px solid #eee;border-radius:10px;padding:24px 22px;transition:box-shadow .2s}
.know-card:hover{box-shadow:0 6px 20px rgba(0,0,0,.05)}
.know-card h3{font-size:16px;font-weight:600;color:#222;margin-bottom:8px}
.know-card p{font-size:14px;color:#666;line-height:1.8}

/* ── 下载页 Hero ─────────────────────────────── */
.dl-hero{padding:56px 0 36px;background:linear-gradient(135deg,#faf8f6 0%,#f2eeea 100%);text-align:center}
.dl-hero h1{font-size:34px;font-weight:700;color:#1a1a1a;margin-bottom:10px}
.dl-hero-sub{font-size:17px;color:#666}

/* ── 平台下载卡片 ────────────────────────────── */
.dl-platforms{padding:40px 0 72px}
.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.platform-card{background:#fafafa;border:1px solid #eee;border-radius:12px;padding:32px 24px;text-align:center;transition:box-shadow .2s,border-color .2s}
.platform-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.06);border-color:#ddd}
.platform-icon{margin-bottom:14px}
.platform-card h3{font-size:19px;font-weight:600;color:#222;margin-bottom:6px}
.platform-ver{font-size:14px;color:#e8582a;font-weight:500;margin-bottom:4px}
.platform-req{font-size:13px;color:#999;margin-bottom:18px}
.platform-card .btn-main{width:100%;max-width:240px;text-align:center}
.platform-tip{display:block;font-size:12px;color:#bbb;margin-top:8px}
.platform-vars{margin-top:12px;font-size:13px}
.platform-vars a{color:#e8582a;transition:color .15s}
.platform-vars a:hover{color:#c44820}
.var-sep{color:#ddd;margin:0 6px}

/* ── 页脚 ────────────────────────────────────── */
.footer{background:#1a1a1a;color:#999;padding:36px 0 28px;text-align:center}
.footer p{font-size:13px;line-height:1.9}
.footer-copy{margin-top:10px;color:#666}

/* ── 响应式 ──────────────────────────────────── */
@media(max-width:768px){
  .hero h1{font-size:26px}
  .hero-sub{font-size:15px}
  .hero-btns{flex-direction:column}
  .hero-btns .btn{text-align:center}
  .reviews-grid{grid-template-columns:1fr}
  .know-grid{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:1fr}
  .sec-title{font-size:22px}
  .dl-hero h1{font-size:26px}
  .nav{gap:18px}
}