*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;background:#0d1117;color:#e6edf3;line-height:1.75;-webkit-font-smoothing:antialiased}
.wrap{max-width:880px;margin:0 auto;padding:0 18px}
a{color:#f0b429;text-decoration:none}
a:hover{text-decoration:underline}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:99;background:#0d1117ee;backdrop-filter:blur(10px);border-bottom:1px solid #21262d}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.nav .logo{font-weight:800;font-size:16px;color:#e6edf3}
.nav .logo em{font-style:normal;color:#f0b429}
.nav nav a{margin-left:20px;font-size:14px;color:#8b949e}
.nav nav a:hover{color:#f0b429}

/* 页头 */
header{padding:52px 0 34px;text-align:center;background:radial-gradient(ellipse at top,#1b2a4a 0%,#0d1117 62%)}
h1{font-size:30px;line-height:1.35;font-weight:800;letter-spacing:-.5px}
h1 em{font-style:normal;color:#f0b429}
.sub{margin-top:14px;color:#8b949e;font-size:15px}
.badge{display:inline-block;margin-top:18px;padding:6px 16px;border:1px solid #f0b42955;border-radius:20px;color:#f0b429;font-size:13px;background:#f0b4290d}

/* 内容区 */
section{padding:40px 0;border-top:1px solid #21262d}
h2{font-size:20px;margin-bottom:20px;font-weight:700}
h2::before{content:"";display:inline-block;width:4px;height:18px;background:#f0b429;border-radius:2px;margin-right:10px;vertical-align:-2px}
h3{font-size:16px;margin:22px 0 10px;color:#f0b429}
p{margin-bottom:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.card{background:#161b22;border:1px solid #21262d;border-radius:12px;padding:18px}
.card h3{font-size:15px;margin-bottom:8px;color:#f0b429}
.card p{font-size:13.5px;color:#8b949e;line-height:1.65;margin:0}

/* 价格 */
.price-box{text-align:center;padding:34px 20px;background:linear-gradient(180deg,#161b22,#0d1117);border:1px solid #f0b42933;border-radius:16px}
.price{font-size:52px;font-weight:900;color:#f0b429;line-height:1}
.price small{font-size:18px;font-weight:500;margin-left:2px}
.price-note{margin-top:10px;color:#8b949e;font-size:13.5px}
.btn{display:block;max-width:340px;margin:26px auto 0;padding:16px;background:linear-gradient(135deg,#f0b429,#e8890c);color:#1a1200;font-size:17px;font-weight:800;text-align:center;border-radius:10px;text-decoration:none;transition:.2s;box-shadow:0 6px 22px #f0b42933}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 28px #f0b42955;text-decoration:none}
.btn-sub{margin-top:12px;text-align:center;font-size:12.5px;color:#6e7681}

/* 步骤 */
.steps{counter-reset:s;list-style:none}
.steps li{position:relative;padding:12px 0 12px 46px;border-bottom:1px dashed #21262d;font-size:14.5px}
.steps li:last-child{border:0}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:12px;width:28px;height:28px;line-height:28px;text-align:center;background:#f0b4291a;color:#f0b429;border-radius:50%;font-size:13px;font-weight:700}

/* FAQ */
.faq details{background:#161b22;border:1px solid #21262d;border-radius:10px;margin-bottom:10px;overflow:hidden}
.faq summary{padding:15px 18px;font-size:14.5px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:#f0b429;font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq p{padding:0 18px 16px;color:#8b949e;font-size:13.5px;margin:0}

/* 提示条 */
.notice{margin-top:16px;padding:12px 16px;background:#f0b4290d;border-left:3px solid #f0b429;border-radius:6px;font-size:13px;color:#c9a227}
.warn{background:#f851490d;border-left-color:#f85149;color:#ff9b95}

/* 表格 */
table{width:100%;border-collapse:collapse;font-size:13.5px;margin:16px 0}
th,td{padding:10px 12px;border:1px solid #21262d;text-align:left}
th{background:#161b22;color:#f0b429;font-weight:600}

/* 正文长文 */
article h2{margin-top:32px}
article ul,article ol{margin:12px 0 12px 22px}
article li{margin-bottom:6px;font-size:14.5px}
blockquote{border-left:3px solid #30363d;padding-left:14px;color:#8b949e;margin:16px 0;font-size:14px}
code{background:#161b22;border:1px solid #21262d;border-radius:4px;padding:2px 6px;font-size:13px;color:#f0b429;font-family:Consolas,Monaco,monospace}
pre{background:#161b22;border:1px solid #21262d;border-radius:8px;padding:14px;overflow-x:auto;margin:14px 0}
pre code{background:none;border:0;padding:0;color:#e6edf3}

/* 内链块 */
.links{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:18px}
.links a{display:block;padding:14px 16px;background:#161b22;border:1px solid #21262d;border-radius:10px;font-size:14px;color:#e6edf3}
.links a:hover{border-color:#f0b42955;text-decoration:none}
.links a span{display:block;font-size:12.5px;color:#8b949e;margin-top:4px}

/* 页脚 */
footer{padding:36px 0;text-align:center;color:#484f58;font-size:12.5px;border-top:1px solid #21262d}
footer a{color:#6e7681}

@media(max-width:600px){h1{font-size:23px}.price{font-size:44px}header{padding:36px 0 26px}.nav nav a{margin-left:12px;font-size:13px}}