:root{
  --bg:#0b0f14; --bg-alt:#10161d; --panel:#171e29; --panel-2:#1c2530;
  --line:#25303d; --text:#e6ebf2; --muted:#8b97a8; --dim:#5c6775;
  --accent:#4f8cff; --accent-2:#7aa8ff; --hot:#ffb454;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent-2);text-decoration:none}
a:hover{color:#fff}
.container{max-width:1080px;margin:0 auto;padding:0 24px}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,15,20,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1080px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.brand{font-weight:700;font-size:17px;color:#fff;letter-spacing:.5px}
.brand span{color:var(--accent-2);font-weight:600}
.nav-links{display:flex;gap:20px;margin-left:auto}
.nav-links a{color:var(--muted);font-size:14px}
.nav-links a:hover{color:#fff}

/* 按钮 */
.btn{display:inline-block;padding:12px 28px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-2);color:#fff}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent-2)}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-block{display:block;text-align:center}

/* 首屏 */
.hero{padding:110px 24px 90px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 50% -10%,rgba(79,140,255,.18),transparent 70%)}
.hero-inner{max-width:760px;margin:0 auto;position:relative}
.eyebrow{display:inline-block;padding:5px 14px;border:1px solid var(--line);border-radius:999px;color:var(--accent-2);font-size:13px;margin-bottom:22px;background:rgba(79,140,255,.06)}
.hero h1{font-size:44px;line-height:1.2;font-weight:800;letter-spacing:.5px}
.hero .lead{color:var(--muted);font-size:17px;margin:22px auto 32px;max-width:620px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-note{color:var(--dim);font-size:13px;margin-top:28px}

/* 首屏标语带 */
.profile-band{
  padding:44px 24px;text-align:center;
  background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  position:relative;overflow:hidden;
}
.profile-band::before{content:"";position:absolute;inset:0;background:radial-gradient(520px 220px at 50% 120%,rgba(79,140,255,.14),transparent 72%)}
.profile-inner{max-width:720px;margin:0 auto;position:relative}
.profile-line{font-size:27px;font-weight:800;line-height:1.35;letter-spacing:.5px;color:#fff}
.profile-line em{font-style:normal;color:var(--accent-2);position:relative}
.profile-line em::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:6px;border-radius:3px;background:rgba(79,140,255,.22)}
.profile-sub{color:var(--muted);font-size:15px;margin-top:14px;line-height:1.75}
@media(max-width:720px){
  .profile-line{font-size:22px}
  .profile-sub{font-size:14.5px}
}

/* 区块通用 */
.section{padding:80px 24px}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:640px;margin:0 auto 46px;text-align:center}
.section-head h2{font-size:30px;font-weight:700;margin-bottom:10px}
.sub{color:var(--muted)}

/* 能力卡片 */
.grid{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:28px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card h3{font-size:17px;margin-bottom:10px;color:#fff}
.card p{color:var(--muted);font-size:14.5px}

/* 工作流 */
.flow{max-width:720px;margin:0 auto;list-style:none;counter-reset:step}
.flow li{display:flex;align-items:baseline;gap:16px;padding:16px 0;border-bottom:1px dashed var(--line);counter-increment:step}
.flow li::before{content:counter(step);width:28px;height:28px;border-radius:8px;background:var(--panel-2);color:var(--accent-2);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0}
.flow strong{color:#fff;min-width:76px}
.flow span{color:var(--muted);font-size:15px}
.flow-note{text-align:center;color:var(--muted);margin-top:28px}

/* 时间线 */
.timeline{max-width:640px;margin:0 auto;list-style:none;border-left:2px solid var(--line);padding-left:28px}
.timeline li{position:relative;padding:10px 0;color:var(--muted)}
.timeline li::before{content:"";position:absolute;left:-32px;top:18px;width:10px;height:10px;border-radius:50%;background:var(--accent)}
.ver{display:inline-block;min-width:56px;color:var(--accent-2);font-weight:600;font-size:14px}

/* 模板标签 */
.tag-cloud{max-width:720px;margin:0 auto;display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.tag{padding:10px 20px;border:1px solid var(--line);border-radius:999px;color:var(--text);font-size:15px;background:var(--panel)}
.tag:hover{border-color:var(--accent-2);color:#fff}

/* 定价 */
.pricing-grid{max-width:760px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:18px}
.plan{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:32px;position:relative}
.plan-hot{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.plan-badge{position:absolute;top:-12px;right:20px;background:var(--hot);color:#1a1206;font-size:12px;font-weight:700;padding:3px 12px;border-radius:999px}
.plan h3{font-size:18px;color:#fff}
.price{font-size:34px;font-weight:800;margin:14px 0;color:#fff}
.price-note{font-size:14px;font-weight:400;color:var(--muted);margin-left:6px}
.plan ul{list-style:none;margin:0 0 24px}
.plan li{padding:7px 0;color:var(--muted);font-size:14.5px;border-bottom:1px solid var(--line)}
.plan li::before{content:"✓ ";color:var(--accent-2)}
.pricing-note{text-align:center;color:var(--muted);margin-top:24px;font-size:14px}

/* FAQ */
.faq-list{max-width:720px;margin:0 auto}
details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px}
summary{cursor:pointer;color:#fff;font-weight:600;font-size:15px;outline:none}
details[open]{border-color:var(--accent)}
details p{color:var(--muted);font-size:14.5px;margin-top:12px}

/* 页脚 */
.footer{border-top:1px solid var(--line);padding:48px 24px;text-align:center}
.footer-inner{max-width:720px;margin:0 auto}
.footer p{color:var(--muted);font-size:14px;margin-top:8px}
.footer-links{margin-top:14px}
.footer-links a{color:var(--muted);font-size:14px}
.footer-links a:hover{color:#fff}
.copyright{color:var(--dim);font-size:12.5px;margin-top:18px}

/* 响应式 */
@media(max-width:820px){
  .grid{grid-template-columns:1fr 1fr}
  .pricing-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .nav-links{display:none}
}
@media(max-width:560px){
  .grid{grid-template-columns:1fr}
}

/* ===== 下载区 ===== */
.dl-grid{max-width:860px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:18px}
.dl-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:30px;position:relative;display:flex;flex-direction:column}
.dl-recommend{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 8px 32px rgba(79,140,255,.12)}
.dl-badge{position:absolute;top:-12px;right:20px;background:var(--hot);color:#1a1206;font-size:12px;font-weight:700;padding:3px 12px;border-radius:999px}
.dl-card h3{font-size:19px;color:#fff;margin-bottom:10px}
.dl-desc{color:var(--muted);font-size:14.5px;margin-bottom:14px;flex:1}
.dl-meta{color:var(--dim);font-size:13px;font-family:"JetBrains Mono",Consolas,monospace;margin-bottom:18px;padding-top:12px;border-top:1px dashed var(--line)}
.dl-hint{color:var(--dim);font-size:12.5px;margin-top:12px;line-height:1.55}
.dl-reqs{max-width:860px;margin:26px auto 0;list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:18px 20px;background:rgba(79,140,255,.04);border:1px solid var(--line);border-radius:12px}
.dl-reqs li{color:var(--muted);font-size:13px}
.dl-reqs strong{display:block;color:var(--accent-2);font-size:12px;margin-bottom:3px;font-weight:600}

/* ===== 教程区 ===== */
.steps{max-width:820px;margin:0 auto;list-style:none}
.step{display:flex;gap:20px;padding:26px 0;border-bottom:1px solid var(--line)}
.step:last-child{border-bottom:0}
.step-no{flex-shrink:0;width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#2f6bd9);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;box-shadow:0 4px 14px rgba(79,140,255,.3)}
.step-body{flex:1;min-width:0}
.step-body h3{font-size:17.5px;color:#fff;margin-bottom:10px}
.step-body p{color:var(--muted);font-size:15px;margin-bottom:12px}
.step-body p:last-child{margin-bottom:0}
.code{background:#080c11;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:14px 16px;margin:12px 0;overflow-x:auto}
.code code{font-family:"JetBrains Mono",Consolas,monospace;font-size:13px;color:#a8c4e8;line-height:1.75;white-space:pre}
.tip{position:relative;padding-left:22px;color:var(--dim)!important;font-size:13.5px!important}
.tip::before{content:"i";position:absolute;left:0;top:1px;width:15px;height:15px;border-radius:50%;background:rgba(79,140,255,.16);color:var(--accent-2);font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;font-style:normal}
.guide-extra{max-width:820px;margin:48px auto 0;padding-top:36px;border-top:1px solid var(--line)}
.guide-extra>h3{font-size:19px;color:#fff;margin-bottom:20px;text-align:center}
.guide-faq{max-width:720px;margin:0 auto}

@media(max-width:820px){
  .dl-grid{grid-template-columns:1fr}
  .dl-reqs{grid-template-columns:1fr 1fr}
  .step{gap:14px;padding:22px 0}
  .step-no{width:32px;height:32px;font-size:14px}
}

/* ===== 主页教程入口卡 ===== */
.guide-cta{padding-top:20px}
.guide-entry{max-width:860px;margin:0 auto;background:linear-gradient(135deg,rgba(79,140,255,.10),rgba(79,140,255,.02));border:1px solid var(--line);border-radius:20px;padding:44px 40px;text-align:center;position:relative;overflow:hidden}
.guide-entry::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 200px at 50% -30%,rgba(79,140,255,.22),transparent 70%);pointer-events:none}
.guide-entry-main{position:relative}
.guide-entry .eyebrow{margin-bottom:16px}
.guide-entry h2{font-size:27px;font-weight:750;color:#fff;margin-bottom:12px}
.guide-entry .sub{max-width:560px;margin:0 auto;font-size:15px}
.guide-mini{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:26px 0 28px;list-style:none;padding:0}
.guide-mini li{display:flex;align-items:center;gap:8px;padding:7px 15px 7px 7px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;color:var(--muted);background:rgba(11,15,20,.5)}
.guide-mini span{width:21px;height:21px;border-radius:50%;background:var(--accent);color:#fff;font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center}
.guide-entry-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.arr{display:inline-block;transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}

/* ===== 独立教程页 ===== */
.page-head{padding:88px 24px 56px;text-align:center;position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-head::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 280px at 50% -20%,rgba(79,140,255,.16),transparent 70%)}
.page-head-inner{max-width:760px;margin:0 auto;position:relative}
.page-head h1{font-size:38px;line-height:1.25;font-weight:800;color:#fff;letter-spacing:.5px}
.page-head .lead{color:var(--muted);font-size:16.5px;margin:18px auto 0;max-width:600px}
.toc{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:30px}
.toc a{padding:7px 15px;border:1px solid var(--line);border-radius:999px;font-size:13.5px;color:var(--muted);background:var(--panel)}
.toc a:hover{border-color:var(--accent);color:#fff}
.step-body h2{font-size:19px;color:#fff;margin-bottom:10px}
.step{scroll-margin-top:90px}
.page-cta{max-width:720px;margin:52px auto 0;text-align:center;padding-top:36px;border-top:1px solid var(--line)}
.page-cta p{color:var(--muted);margin-bottom:20px;font-size:15px}
.page-cta .btn{margin:0 6px}
.nav-links a.is-active{color:#fff;position:relative}
.nav-links a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--accent);border-radius:2px}

/* ===== 完整教程（12 章）===== */
.page-meta{color:var(--dim);font-size:13px;margin-top:12px}
.toc-long{max-width:820px;margin-left:auto;margin-right:auto}
.tut-sec{max-width:840px;margin:0 auto;padding-top:56px;padding-bottom:56px;scroll-margin-top:80px}
.tut-sec + .tut-sec{border-top:1px dashed var(--line)}
.tut-title{font-size:26px;font-weight:800;color:#fff;letter-spacing:.5px;margin-bottom:12px}
.tut-lead{color:var(--muted);font-size:15.5px;line-height:1.8;margin-bottom:22px}
.tut-sec h3{font-size:17.5px;font-weight:700;color:var(--accent-2);margin:30px 0 12px;scroll-margin-top:90px}
.tut-sec p{color:var(--muted);font-size:14.5px;line-height:1.85;margin:10px 0}
.tut-sec ul,.tut-sec ol{margin:10px 0 14px;padding-left:22px}
.tut-sec li{color:var(--muted);font-size:14.5px;line-height:1.85;margin:6px 0}
.tut-sec li::marker{color:var(--accent)}
.tut-sec strong{color:var(--text)}
.note{background:rgba(79,140,255,.07);border:1px solid rgba(79,140,255,.25);border-left:3px solid var(--accent);border-radius:10px;padding:14px 18px;margin:16px 0}
.note-label{display:inline-block;color:var(--accent-2);font-weight:700;font-size:13px;margin-right:8px}
.note p{display:inline;font-size:14px;color:var(--muted)}
.tut-quote{border-left:3px solid var(--hot);background:var(--panel);border-radius:0 10px 10px 0;padding:16px 20px;margin:16px 0;color:var(--text);font-size:14.5px;line-height:1.85}
.tut-shot{margin:20px 0;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.tut-shot img{max-width:100%;height:auto;border-radius:8px;display:block;margin:0 auto;box-shadow:0 4px 24px rgba(0,0,0,.35)}
.tut-shot figcaption{color:var(--dim);font-size:12.5px;margin-top:10px}
.tut-table-wrap{margin:20px 0}
.tut-table-wrap figcaption{color:var(--dim);font-size:12.5px;margin-bottom:8px;text-align:center}
.tut-table{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:13.5px}
.tut-table th{background:rgba(79,140,255,.12);color:var(--accent-2);font-weight:700;text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
.tut-table td{color:var(--muted);padding:10px 14px;border-bottom:1px solid var(--line);line-height:1.7}
.tut-table tr:last-child td{border-bottom:none}
@media(max-width:720px){
  .tut-title{font-size:21px}
  .tut-sec h3{font-size:16px}
  .tut-shot{padding:10px}
}

@media(max-width:820px){
  .page-head{padding:64px 20px 44px}
  .page-head h1{font-size:27px}
  .guide-entry{padding:32px 22px}
  .guide-entry h2{font-size:22px}
}

/* ===== 品牌图标 ===== */
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-logo{width:24px;height:24px;object-fit:contain;flex-shrink:0;filter:drop-shadow(0 0 6px rgba(45,212,191,.25))}
.footer .brand-logo{opacity:.9}