:root{--pri:#1554f0;--pri-h:#2c6ef7;--pri-l:#eef4ff;--ok:#16a34a;--warn:#d97706;--danger:#dc2626;--tx:#0f172a;--tx2:#64748b;--bd:#e2e8f0;--bg:#f8fafc;--card:#fff;--code-bg:#0f172a;--sidebar:260px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;font-size:15px;color:var(--tx);background:var(--bg);line-height:1.7}
a{color:var(--pri);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:'JetBrains Mono','Fira Code','Consolas',monospace;font-size:.88em;background:#f1f5f9;padding:2px 6px;border-radius:4px;color:#1e40af}
pre{background:var(--code-bg);border-radius:12px;overflow-x:auto;margin:16px 0}
pre code{background:none;padding:20px 24px;display:block;font-size:13px;line-height:1.7;color:#e2e8f0;white-space:pre}

/* ===== LAYOUT ===== */
.layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar);background:#fff;border-right:1px solid var(--bd);position:fixed;top:0;bottom:0;overflow-y:auto;flex-shrink:0;z-index:10}
.main{margin-left:var(--sidebar);flex:1;min-width:0}
.topbar{background:#fff;border-bottom:1px solid var(--bd);height:56px;display:flex;align-items:center;padding:0 40px;position:sticky;top:0;z-index:9;gap:16px}
.topbar-logo{font-size:16px;font-weight:800;color:var(--tx);display:flex;align-items:center;gap:8px}
.topbar-logo span{font-size:13px;font-weight:500;color:var(--tx2);border-left:1px solid var(--bd);padding-left:12px}
.content{max-width:900px;padding:40px 40px 80px}

/* ===== SIDEBAR ===== */
.sb-brand{padding:18px 20px 14px;border-bottom:1px solid var(--bd)}
.sb-brand-name{font-size:15px;font-weight:800;color:var(--tx);display:flex;align-items:center;gap:7px}
.sb-brand-ver{font-size:11px;color:var(--tx2);background:var(--bg);border:1px solid var(--bd);padding:1px 7px;border-radius:10px;font-weight:500}
.sb-section{padding:16px 12px 4px;font-size:10px;font-weight:700;color:var(--tx2);letter-spacing:1.2px;text-transform:uppercase}
.sb-link{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:8px;margin:1px 8px;font-size:13.5px;color:var(--tx2);cursor:pointer;transition:all .15s;text-decoration:none}
.sb-link:hover{background:var(--bg);color:var(--tx);text-decoration:none}
.sb-link.active{background:var(--pri-l);color:var(--pri);font-weight:600}
.sb-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.sb-dot.get{background:#16a34a}
.sb-dot.post{background:#d97706}
.sb-method{font-size:10px;font-weight:700;padding:1px 6px;border-radius:4px;flex-shrink:0}
.m-get{background:#dcfce7;color:#15803d}
.m-post{background:#fef3c7;color:#b45309}

/* ===== CONTENT ===== */
h1{font-size:30px;font-weight:800;color:var(--tx);margin-bottom:10px}
h2{font-size:22px;font-weight:700;color:var(--tx);margin:44px 0 16px;padding-top:8px;border-top:1px solid var(--bd)}
h2:first-of-type{border-top:none;margin-top:24px}
h3{font-size:16px;font-weight:700;color:var(--tx);margin:28px 0 12px}
p{margin-bottom:14px;color:var(--tx2);line-height:1.8}
.lead{font-size:17px;color:var(--tx2);margin-bottom:28px;line-height:1.8}
ul{margin:0 0 14px 20px}
li{margin-bottom:6px;color:var(--tx2)}

/* ===== ENDPOINT HEADER ===== */
.ep-header{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:18px 22px;margin-bottom:24px;display:flex;align-items:center;gap:14px}
.ep-badge{font-size:13px;font-weight:800;padding:5px 12px;border-radius:7px;flex-shrink:0}
.ep-badge.GET{background:#dcfce7;color:#15803d}
.ep-badge.POST{background:#fef3c7;color:#b45309}
.ep-url{font-family:'JetBrains Mono','Consolas',monospace;font-size:15px;font-weight:600;color:var(--tx)}
.ep-desc{font-size:13px;color:var(--tx2);margin-left:auto}

/* ===== TABLES ===== */
.tbl-wrap{overflow-x:auto;margin:16px 0}
table{width:100%;border-collapse:collapse;font-size:13.5px}
thead th{background:#f8fafc;padding:10px 14px;text-align:left;font-weight:600;color:var(--tx);border-bottom:2px solid var(--bd);white-space:nowrap}
tbody td{padding:10px 14px;border-bottom:1px solid #f1f5f9;vertical-align:top}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:#fafcff}
.td-name{font-family:monospace;font-size:13px;font-weight:600;color:#1e40af}
.td-type{font-size:12px;color:var(--tx2);font-family:monospace}
.td-req{font-size:11px;font-weight:700;padding:2px 7px;border-radius:4px}
.req-y{background:#fee2e2;color:#b91c1c}
.req-n{background:#f1f5f9;color:#64748b}
.req-cond{background:#fef3c7;color:#92400e}

/* ===== ALERTS ===== */
.alert{border-radius:10px;padding:14px 18px;margin:18px 0;font-size:14px;line-height:1.7}
.alert-info{background:var(--pri-l);border-left:4px solid var(--pri);color:#1e40af}
.alert-warn{background:#fef3c7;border-left:4px solid #f59e0b;color:#78350f}
.alert-ok{background:#f0fdf4;border-left:4px solid #22c55e;color:#14532d}
.alert-danger{background:#fef2f2;border-left:4px solid #ef4444;color:#7f1d1d}

/* ===== CODE TABS ===== */
.code-tabs{margin:16px 0}
.tabs-nav{display:flex;gap:2px;background:#1e293b;border-radius:12px 12px 0 0;padding:8px 12px 0}
.tab-item{padding:7px 16px;font-size:12.5px;font-weight:600;color:rgba(255,255,255,.45);cursor:pointer;border-radius:6px 6px 0 0;transition:.15s}
.tab-item.active{background:var(--code-bg);color:rgba(255,255,255,.9)}
.tab-pane{display:none}
.tab-pane.active{display:block}
.tab-pane pre{border-radius:0 0 12px 12px;margin:0}

/* ===== SIGN FLOW ===== */
.sign-steps{counter-reset:step;display:flex;flex-direction:column;gap:12px;margin:16px 0}
.sign-step{display:flex;gap:14px;align-items:flex-start}
.sign-step::before{counter-increment:step;content:counter(step);min-width:28px;height:28px;background:linear-gradient(135deg,var(--pri),var(--pri-h));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;flex-shrink:0;margin-top:2px}
.sign-step-body{flex:1}
.sign-step-title{font-weight:700;font-size:14px;color:var(--tx);margin-bottom:4px}
.sign-step-desc{font-size:13px;color:var(--tx2)}

/* ===== STATUS BADGE ===== */
.status-badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}
.s0{background:#f1f5f9;color:#475569}
.s1{background:#dcfce7;color:#15803d}
.s2{background:#f1f5f9;color:#94a3b8}
.s3{background:#fee2e2;color:#b91c1c}

/* ===== ERROR TABLE ===== */
.err-code{font-family:monospace;font-weight:700;font-size:14px}

/* ===== CALLBACK ===== */
.cb-flow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:20px 0;font-size:13px}
.cb-node{background:#fff;border:1px solid var(--bd);border-radius:8px;padding:8px 16px;font-weight:600;color:var(--tx)}
.cb-arrow{color:var(--tx2);font-size:18px}
.cb-node.highlight{background:linear-gradient(135deg,var(--pri),var(--pri-h));color:#fff;border-color:transparent}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .sidebar{display:none}
  .main{margin-left:0}
  .content{padding:24px 20px 60px}
}