/* 联动啦子页面共享样式（与首页 design-b 同一视觉体系） */
:root{
  --bg:#0B0E13; --bg2:#0F131B; --card:#141A25; --card2:#18202E;
  --line:rgba(255,255,255,.08); --line2:rgba(255,255,255,.14);
  --ink:#EDF1F7; --ink2:#A7B0C0; --ink3:#6B7589;
  --red:#FF4D42; --red-d:#E03127; --red-glow:rgba(255,77,66,.35);
  --green:#2BD97B; --amber:#FFC947;
  --radius:18px; --shadow:0 20px 60px rgba(0,0,0,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei UI","Microsoft YaHei","PingFang SC",system-ui,-apple-system,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
section[id]{scroll-margin-top:90px}
.wrap{max-width:980px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* 导航 */
header{position:sticky;top:0;z-index:60;background:rgba(11,14,19,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1140px}
.logo{display:flex;align-items:center;gap:11px;font-size:20px;font-weight:800;letter-spacing:.5px}
.logo img{width:34px;height:34px;border-radius:9px}
.nav-links{display:flex;gap:28px}
.nav-links a{color:var(--ink2);font-size:14.5px;transition:.15s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.cur{color:var(--red);font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;border-radius:12px;cursor:pointer;transition:.18s;border:1px solid transparent;white-space:nowrap}
.btn-red{background:linear-gradient(135deg,#FF6A5F,#E03127);color:#fff;box-shadow:0 10px 28px var(--red-glow)}
.btn-red:hover{transform:translateY(-2px);box-shadow:0 14px 34px var(--red-glow)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--ink);border-color:var(--line2)}
.btn-ghost:hover{border-color:rgba(255,255,255,.3)}
.nav-cta .btn{padding:10px 20px;font-size:14.5px}

/* 子页头 */
.page-hero{padding:72px 0 44px;background:radial-gradient(900px 380px at 30% -20%,rgba(255,77,66,.09),transparent 60%),linear-gradient(180deg,var(--bg2),var(--bg));border-bottom:1px solid var(--line)}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--red);background:rgba(255,77,66,.1);border:1px solid rgba(255,77,66,.25);border-radius:999px;padding:5px 14px;letter-spacing:1px}
.page-hero h1{font-size:38px;font-weight:800;margin-top:16px;letter-spacing:.5px}
.page-hero .lead{color:var(--ink2);margin-top:12px;font-size:16.5px;max-width:640px}
.page-hero .meta{margin-top:14px;font-size:13px;color:var(--ink3)}

/* 内容区 */
.sec{padding:56px 0}
.sec + .sec{border-top:1px solid var(--line)}
.doc h2{font-size:24px;font-weight:800;margin-bottom:20px;display:flex;align-items:center;gap:12px}
.doc h2 .no{font-size:15px;color:var(--red);background:rgba(255,77,66,.1);border:1px solid rgba(255,77,66,.25);border-radius:8px;padding:2px 10px}
.doc p{color:var(--ink2);font-size:15.5px;margin:10px 0;max-width:760px}
.doc b{color:var(--ink)}
.doc a{color:#FF8A80;font-weight:600}
.doc a:hover{text-decoration:underline}

/* FAQ 手风琴 */
.faq{display:grid;gap:12px;margin-top:8px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.qa summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:700;font-size:15.5px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.qa summary::-webkit-details-marker{display:none}
.qa summary .pl{color:var(--red);font-size:22px;font-weight:400;transition:.2s;flex:none}
.qa[open] summary .pl{transform:rotate(45deg)}
.qa[open]{border-color:rgba(255,77,66,.35)}
.qa .ans{padding:0 22px 20px;color:var(--ink2);font-size:14.5px}
.qa .ans a{color:#FF8A80;font-weight:600}

/* 步骤 */
.steps{display:grid;gap:16px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start}
.step .n{font-size:34px;font-weight:800;line-height:1.2;background:linear-gradient(135deg,#FF7A6E,#C4241B);-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:17.5px}
.step p{color:var(--ink2);font-size:14.5px;margin-top:6px}

/* 表格 */
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:8px}
.tbl th,.tbl td{padding:15px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.tbl th{background:rgba(255,255,255,.03);font-weight:700;color:var(--ink)}
.tbl tr:last-child td{border-bottom:0}
.tbl td{color:var(--ink2)}
.tbl td.hl{color:var(--ink);font-weight:600}
.tbl .good{color:var(--green)}
.tbl .bad{color:var(--ink3)}

/* 提示框 */
.tip{background:rgba(255,201,71,.07);border:1px solid rgba(255,201,71,.28);border-radius:14px;padding:18px 22px;color:var(--ink2);font-size:14.5px;margin-top:24px}
.tip b{color:var(--amber)}
.tip-red{background:rgba(255,77,66,.07);border-color:rgba(255,77,66,.3)}
.tip-red b{color:#FF8A80}

/* 版本卡（下载页/更新日志页） */
.ver-card{background:linear-gradient(160deg,var(--card2),var(--card));border:1px solid var(--line2);border-radius:22px;padding:36px 40px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.ver-card:before{content:"";position:absolute;width:360px;height:360px;border-radius:50%;background:rgba(255,77,66,.1);filter:blur(100px);top:-140px;right:-80px}
.ver-head{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;position:relative}
.ver-num b{font-size:50px;font-weight:800;line-height:1}
.ver-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(43,217,123,.12);color:var(--green);border:1px solid rgba(43,217,123,.3);font-size:12.5px;font-weight:700;border-radius:999px;padding:3px 12px;margin-left:12px;vertical-align:middle}
.ver-meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:4px 22px;color:var(--ink3);font-size:13.5px}
.ver-meta b{color:var(--ink2);font-weight:600}
.ver-dl .btn{padding:16px 34px;font-size:16.5px}
.ver-note{position:relative;margin-top:14px;font-size:12.5px;color:var(--ink3)}
.ver-note a{color:#FF8A80}
.req-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px 28px;margin-top:16px}
.req-list li{display:flex;gap:9px;align-items:flex-start;color:var(--ink2);font-size:14.5px;padding:4px 0}
.req-list svg{color:var(--green);flex:none;margin-top:4px}

/* 更新日志条目 */
.log-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 30px;display:grid;grid-template-columns:150px 1fr;gap:20px}
.log-item + .log-item{margin-top:14px}
.log-item .lv{font-weight:800;font-size:19px}
.log-item .ld{color:var(--ink3);font-size:13px;margin-top:4px}
.log-item ul{margin:0;padding-left:18px;color:var(--ink2);font-size:14.5px}
.log-item li{padding:3px 0}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
.about-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px}
.about-card h3{font-size:17px;margin-bottom:12px}
.about-card p{color:var(--ink2);font-size:14.5px;margin:8px 0}
.about-qr{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.about-qr .qrbox{background:#fff;border-radius:14px;padding:12px}
.about-qr img{border-radius:8px}
.about-qr b{display:block;margin-top:12px;font-size:15px}
.about-qr span{display:block;color:var(--ink3);font-size:12.5px;margin-top:4px}
.about-qr .pp{display:inline-block;margin-top:10px;font-size:12px;font-weight:700;color:var(--amber);background:rgba(255,201,71,.1);border:1px solid rgba(255,201,71,.28);border-radius:999px;padding:4px 13px}

/* 悬浮客服（与首页一致） */
.cs-float{position:fixed;right:22px;bottom:22px;z-index:70}
.cs-fab{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#FF6A5F,#E03127);color:#fff;border:none;cursor:pointer;font-size:14.5px;font-weight:700;padding:13px 21px;border-radius:999px;box-shadow:0 12px 32px rgba(224,49,39,.42);transition:.18s;font-family:inherit;letter-spacing:.5px}
.cs-fab:hover{transform:translateY(-2px)}
.cs-pop{position:absolute;right:0;bottom:66px;width:238px;background:#fff;border-radius:16px;padding:18px 18px 15px;box-shadow:0 24px 64px rgba(0,0,0,.55);text-align:center;opacity:0;transform:translateY(10px) scale(.96);transform-origin:bottom right;pointer-events:none;transition:.2s}
.cs-pop.open{opacity:1;transform:none;pointer-events:auto}
.cs-pop img{width:100%;border-radius:10px;display:block}
.cs-pop b{display:block;color:#151A22;font-size:14.5px;margin-top:11px}
.cs-pop span{display:block;color:#6C7686;font-size:12px;margin-top:3px}
.cs-pop .pp{display:inline-block;margin-top:10px;font-size:11.5px;font-weight:700;color:#8C6D1F;background:rgba(255,201,71,.32);border-radius:999px;padding:3px 11px}

/* 页脚 */
footer{border-top:1px solid var(--line);background:var(--bg2);padding:48px 0 28px;margin-top:10px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px;max-width:1140px}
footer .logo{font-size:19px}
footer p{color:var(--ink3);font-size:13.5px;margin-top:12px;max-width:320px}
footer h5{font-size:14.5px;margin-bottom:12px;color:var(--ink)}
footer .fl a{display:block;color:var(--ink2);font-size:13.5px;padding:4px 0}
footer .fl a:hover{color:var(--ink)}
.risk{border-top:1px solid var(--line);margin-top:30px;padding-top:20px;color:var(--ink3);font-size:12.5px;line-height:1.85}
.risk b{color:var(--ink2)}
.copy{color:#4A5261;font-size:12.5px;margin-top:12px}

@media(max-width:860px){
  .nav-links{display:none}
  .page-hero{padding:52px 0 36px}
  .page-hero h1{font-size:28px}
  .step{grid-template-columns:48px 1fr}
  .req-list{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .log-item{grid-template-columns:1fr;gap:8px}
  .foot-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{transition:none!important;animation:none!important}
}