:root{--bg:#0a0e1a;--bg2:#0d1322;--panel:#111a30;--panel2:#16223c;--line:#1e2b47;
--ink:#e9edf7;--muted:#8a95b5;--brand:#8b7cf6;--brand2:#5b8cff;--gold:#ffb340;
--brand-grad:linear-gradient(120deg,#8b7cf6,#5b8cff)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;line-height:1.7;font-size:16px}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.kicker{display:inline-block;color:var(--brand);font-size:13px;letter-spacing:.2em;text-transform:uppercase;margin-bottom:12px}
h1,h2,h3{line-height:1.25;color:var(--ink)}
.sec{padding:72px 0}
.sec.alt{background:var(--bg2)}
.sec-head{max-width:720px;margin:0 auto 40px;text-align:center}
.sec-head h2{font-size:30px;margin-bottom:12px}
.sec-head p{color:var(--muted)}

/* 顶部深色玻璃导航 */
.nav{position:sticky;top:0;z-index:50;background:#ffffff;border-bottom:1px solid rgba(26,26,46,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;color:#1a1a2e;font-weight:700;font-size:18px}
.logo img{width:30px;height:30px;object-fit:contain}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:#3f3d56;font-size:15px}
.nav-links a:hover{color:#1a1a2e;text-decoration:none}
.nav-links a.cta{background:var(--brand-grad);color:#fff;padding:8px 18px;border-radius:8px;font-weight:700}

/* hero 深空星海居中 */
.hero{position:relative;overflow:hidden;background:var(--bg);border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;opacity:.2;background-size:cover;background-position:center}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(900px 480px at 50% -8%,rgba(139,124,246,.22),transparent 70%)}
.hero-inner{position:relative;max-width:960px;margin:0 auto;text-align:center;padding:104px 24px 96px}
.hero h1{font-size:48px;margin:6px 0 20px;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:18px;max-width:640px;margin:0 auto 30px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;font-weight:700;font-size:16px;border:1px solid transparent}
.btn.pri{background:var(--brand-grad);color:#fff;box-shadow:0 8px 24px rgba(139,124,246,.35)}
.btn.ghost{border-color:var(--line);color:var(--ink)}
.btn.gold{background:var(--gold);color:#2a1a00}
.hero-trust{margin-top:28px;display:flex;gap:24px;color:var(--muted);font-size:13px;flex-wrap:wrap;justify-content:center}
.hero-trust b{color:var(--brand2);font-weight:700}

/* 星座招牌 */
.constellation-wrap{max-width:640px;margin:0 auto}
.constellation-wrap svg{width:100%;height:auto}
.star-points{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.star-point{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center}
.star-point .ic{font-size:26px;margin-bottom:8px}
.star-point b{display:block;font-size:16px;color:var(--ink)}
.star-point span{color:var(--muted);font-size:13px}

/* 下载矩阵图文 */
.constellation-band{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.constellation-band figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* bento 功能 */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;transition:.2s}
.card:hover{border-color:var(--brand);transform:translateY(-3px)}
.card .ic{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;background:rgba(139,124,246,.14);font-size:22px;color:var(--brand)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}

/* 横向滚动 rail */
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:300px;gap:20px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}
.rail .card{scroll-snap-align:start}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:st}
.step{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;position:relative}
.step::before{counter-increment:st;content:counter(st);position:absolute;top:-14px;left:20px;width:34px;height:34px;border-radius:50%;background:var(--brand-grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.step h3{font-size:17px;margin:8px 0 8px}
.step p{color:var(--muted);font-size:14px}

/* 表格 */
.tbl{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tbl th,.tbl td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.tbl th{background:var(--panel2);color:var(--brand);font-weight:700}
.tbl tr:last-child td{border-bottom:none}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:14px}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 22px}
.faq summary{cursor:pointer;font-weight:700;font-size:16px;color:var(--ink);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{margin-top:12px;color:var(--muted)}

/* 文章 */
.article-head{padding:56px 0 28px;background:var(--bg2);border-bottom:1px solid var(--line)}
.article-head h1{font-size:34px;margin:14px 0 12px}
.meta{display:flex;gap:20px;color:var(--muted);font-size:13px;flex-wrap:wrap}
.meta b{color:var(--brand2)}
.article-cols{display:grid;grid-template-columns:250px 1fr;gap:40px;padding:40px 0}
.toc{position:sticky;top:80px;align-self:start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px}
.toc h5{font-size:13px;color:var(--brand);letter-spacing:.1em;margin-bottom:12px}
.toc ol{list-style:none}
.toc li{margin:8px 0;font-size:14px}
.toc .num{display:inline-block;width:22px;height:22px;line-height:22px;text-align:center;background:rgba(139,124,246,.16);color:var(--brand2);border-radius:6px;margin-right:8px;font-size:12px}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--brand2)}
.prose{max-width:720px}
.prose h2{font-size:24px;margin:36px 0 14px;padding-left:14px;border-left:4px solid var(--brand)}
.prose h2:first-child{margin-top:0}
.prose p{margin:12px 0;color:#c7cde4}
.prose ul,.prose ol{margin:12px 0;padding-left:24px}
.prose li{margin:6px 0;color:#c7cde4}
.prose figure{margin:22px 0}
.prose figure img{border-radius:12px;border:1px solid var(--line)}
.prose figcaption{color:var(--muted);font-size:13px;text-align:center;margin-top:8px}
.prose blockquote{border-left:3px solid var(--brand);background:var(--panel);padding:14px 18px;border-radius:0 10px 10px 0;margin:16px 0;color:var(--muted)}
.tip,.callout{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:10px;margin:16px 0}
.tip{background:rgba(139,124,246,.12);border:1px solid rgba(139,124,246,.4)}
.callout{background:rgba(39,174,96,.12);border:1px solid rgba(39,174,96,.4)}
.tip .e,.callout .e{font-size:18px;flex-shrink:0}
.tip .e{color:var(--brand)}
.callout .e{color:#27ae60}
.tip p,.callout p{margin:0;color:var(--ink);font-size:14px}

/* 相关阅读 */
.related{margin-top:40px}
.rel-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rel-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;transition:.2s}
.rel-item:hover{border-color:var(--brand)}
.rel-item a{padding:18px;display:flex;align-items:center;gap:12px;color:var(--ink)}
.rel-item a:hover{text-decoration:none}
.rel-item .tag{background:rgba(139,124,246,.16);color:#a99bf7;font-size:12px;padding:2px 10px;border-radius:20px;flex-shrink:0}
.rel-item h4{font-size:15px;color:var(--ink)}
.rel-item .go{margin-left:auto;color:var(--brand);font-size:22px}

/* CTA 带 */
.cta-band{background:radial-gradient(900px 300px at 50% -20%,rgba(139,124,246,.2),transparent),var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-inner{padding:64px 0;text-align:center}
.cta-inner h2{font-size:32px;margin-bottom:14px}
.cta-inner p{color:var(--muted);margin-bottom:28px}

/* 页脚 */
.footer{background:#070a14;border-top:1px solid var(--line);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{display:block;color:rgba(255,255,255,.5);font-size:14px;margin:8px 0}
.footer a:hover{color:#fff}
.footer .logo{font-size:20px;margin-bottom:10px;color:#fff}
.footer .desc{color:rgba(255,255,255,.45);font-size:14px}
.footer .stardust{height:2px;background:linear-gradient(90deg,transparent,var(--brand),transparent);margin:20px 0}
.copyright{text-align:center;color:rgba(255,255,255,.35);font-size:13px;padding-top:20px}

/* 面包屑 */
.crumb{color:var(--muted);font-size:13px;margin-bottom:8px}
.crumb a{color:var(--muted)}
.crumb span{color:var(--brand)}

/* 分享 */
.share{display:flex;gap:12px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
.share a{color:var(--muted);font-size:14px}
.share a:hover{color:var(--brand2)}

/* 星空足迹带(横向滚动照片带) */
.fp-track{display:flex;gap:18px;overflow-x:auto;padding:10px 24px 26px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.fp-item{flex:0 0 250px;margin:0;border-radius:16px;overflow:hidden;position:relative;scroll-snap-align:center;border:1px solid var(--line)}
.fp-item img{width:100%;height:300px;object-fit:cover;display:block}
.fp-item figcaption{position:absolute;left:0;right:0;bottom:0;padding:34px 16px 14px;background:linear-gradient(transparent,rgba(7,10,20,.9));color:#e9edf7}
.fp-item strong{display:block;font-size:15px;color:#fff}
.fp-item span{font-size:12px;color:#8a95b5}

/* 深空引擎(全屏背景 + 玻璃卡) */
.engine{position:relative;overflow:hidden;padding:104px 0}
.engine-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.45}
.engine-shade{position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,rgba(10,14,26,.4) 50%,var(--bg) 100%)}
.engine-inner{position:relative}
.glass-dark{background:rgba(17,26,48,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(139,124,246,.28);border-radius:18px;box-shadow:0 24px 60px rgba(0,0,0,.4)}
.engine-copy{max-width:620px;padding:42px 46px}
.checklist{list-style:none;margin:18px 0 26px;display:grid;grid-template-columns:1fr 1fr;gap:10px 20px}
.checklist li{padding-left:22px;position:relative;color:#c7cde4;font-size:14px}
.checklist li::before{content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 8px var(--brand)}

/* 场景叙事(全屏照片块 + 玻璃卡) */
.scenes{display:flex;flex-direction:column}
.scene-block{position:relative;min-height:400px;background-size:cover;background-position:center;display:flex;align-items:center}
.scene-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,14,26,.82),rgba(10,14,26,.18) 60%,rgba(10,14,26,.4))}
.scene-inner{position:relative;width:100%}
.glass{background:rgba(13,19,34,.66);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(139,124,246,.22);border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.scene-copy{max-width:440px;padding:30px 34px}
.scene-time{display:inline-block;color:var(--gold);font-size:12px;letter-spacing:.15em;margin-bottom:8px}
.scene-copy h3{font-size:22px;margin-bottom:8px;color:var(--ink)}
.scene-copy p{color:#c7cde4;font-size:14px}

/* 火箭升空三步 */
.ascent{display:flex;gap:52px;align-items:center;justify-content:center;max-width:820px;margin:0 auto}
.ascent-visual{flex-shrink:0;width:150px}
.ascent-visual svg{width:100%;height:auto}
.ascent-steps{flex:1;display:flex;flex-direction:column;gap:24px}
.ascent-step{display:flex;gap:18px;align-items:flex-start}
.ascent-step em{flex-shrink:0;width:36px;height:36px;border-radius:50%;background:var(--brand-grad);color:#fff;font-style:normal;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;margin-top:2px}
.ascent-step h3{font-size:17px;margin-bottom:4px;color:var(--ink)}
.ascent-step p{color:var(--muted);font-size:14px}

/* 深空信号日志 FAQ */
.siglog{display:flex;flex-direction:column;gap:14px;max-width:780px;margin:0 auto}
.siglog details{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--brand2);border-radius:0 12px 12px 0;padding:16px 22px}
.siglog summary{cursor:pointer;font-weight:700;font-size:16px;color:var(--ink);list-style:none;display:flex;align-items:center;gap:12px}
.siglog summary::-webkit-details-marker{display:none}
.siglog .sig{display:inline-flex;align-items:flex-end;gap:2px;height:16px;flex-shrink:0}
.siglog .sig i{width:3px;background:var(--brand2);border-radius:1px}
.siglog .sig i:nth-child(1){height:6px}.siglog .sig i:nth-child(2){height:13px}.siglog .sig i:nth-child(3){height:9px}.siglog .sig i:nth-child(4){height:15px}
.siglog details p{margin-top:12px;color:var(--muted);padding-left:30px}

/* 全屏 CTA */
.final-cta{position:relative;overflow:hidden;padding:104px 0;color:#fff}
.final-cta .cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.55}
.final-cta .cta-shade{position:absolute;inset:0;background:radial-gradient(900px 420px at 50% 50%,rgba(139,124,246,.22),transparent),rgba(10,14,26,.5)}
.fcta-inner{position:relative}
.cta-card{max-width:560px;margin:0 auto;padding:48px 52px;text-align:center}
.cta-card h2{font-size:30px;margin-bottom:12px;color:#fff}
.cta-card p{color:#c7cde4;margin-bottom:26px}

@media(max-width:900px){
 .hero-inner{padding:72px 24px}
 .constellation-wrap{max-width:480px}
 .star-points{grid-template-columns:1fr 1fr}
 .article-cols,.constellation-band{grid-template-columns:1fr}
 .bento,.steps{grid-template-columns:1fr 1fr}
 .checklist{grid-template-columns:1fr}
 .ascent{flex-direction:column;gap:32px}
 .scene-block{min-height:340px}
 .engine-copy{padding:34px 30px}
 .rel-list{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr 1fr}
 .toc{position:static}
}
@media(max-width:600px){
 .bento,.steps,.star-points{grid-template-columns:1fr}
 .hero h1{font-size:34px}
 .nav-links{display:none}
}