/* Suno-API blog — light theme shared with /docs/.
   Header markup and header.css are reused as-is; this file owns only the
   blog surfaces (hero, cards, article, TOC, related, footer). */

:root{
  --bg:#fff;--panel:#f8f9fb;--line:#e8eaef;--text:#2c3e50;--muted:#6b7280;
  --brand:#6366f1;--brand-2:#764ba2;--link:#4f46e5;--ink:#1f2937;
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%}
[hidden]{display:none!important}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ── hero ─────────────────────────────────────────────────────────────── */
.hero-band{
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(680px 260px at 12% -10%,rgba(99,102,241,.10),transparent 70%),
    radial-gradient(560px 240px at 88% -20%,rgba(118,75,162,.10),transparent 70%),
    #fff;
}
.blog-head{padding-block:44px 32px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumb a{color:var(--muted)}
.blog-head-row{display:flex;align-items:flex-end;gap:28px;flex-wrap:wrap}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:10px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.blog-head h1{
  margin:0;font-size:42px;line-height:1.16;letter-spacing:-.9px;color:var(--ink);
}
.sub{color:var(--muted);margin:12px 0 0;font-size:16.5px;max-width:580px}
.stat{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.stat span{font-size:12.5px;color:#4b5563;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:4px 11px}

.search{margin-left:auto;flex:0 1 340px;position:relative}
.search input{
  width:100%;height:46px;border:1px solid var(--line);border-radius:12px;
  padding:0 40px 0 42px;font-size:15px;background:#fff;color:var(--text);
  box-shadow:0 1px 2px rgba(44,62,80,.04);
}
.search input::placeholder{color:#9aa3b2}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.search input::-webkit-search-cancel-button{-webkit-appearance:none;display:none}
.search svg{position:absolute;left:14px;top:15px;color:#8b93a3}
.search-clear{
  position:absolute;right:8px;top:8px;width:30px;height:30px;border:0;border-radius:8px;
  background:#f1f2f7;color:#6b7280;font-size:18px;line-height:1;cursor:pointer;
}
.search-clear:hover{background:#e8eaf2;color:var(--ink)}

/* ── filters ──────────────────────────────────────────────────────────── */
.filters{
  position:sticky;top:60px;z-index:8;background:rgba(255,255,255,.93);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.filter-row{display:flex;align-items:center;gap:12px;padding-block:12px}
.chips{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;min-width:0}
.chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 13px;border-radius:999px;
  border:1px solid var(--line);color:#4b5563;font-size:13.5px;white-space:nowrap;background:#fff;
  transition:border-color .15s ease,color .15s ease,background .15s ease;
}
.chip b{font-weight:600;font-size:12px;color:#9aa3b2}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.chip.on b{color:rgba(255,255,255,.8)}
.chip:hover:not(.on){border-color:#c9cee6;color:var(--ink)}
.filter-note{margin-left:auto;font-size:12.5px;color:#9aa3b2;white-space:nowrap}

/* ── feature + grid ───────────────────────────────────────────────────── */
.blog-main{padding-top:0}
.feature{
  display:grid;grid-template-columns:1.12fr 1fr;margin:34px 0 30px;
  border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;
  box-shadow:0 14px 40px -28px rgba(44,62,80,.35);
}
.feature-cover{position:relative;min-height:360px;background:#eceef4;display:block;overflow:hidden}
.feature-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .35s ease}
.feature:hover .feature-cover img{transform:scale(1.02)}
.feature-body{padding:34px 36px;display:flex;flex-direction:column;justify-content:center}
.kicker{
  display:inline-flex;align-items:center;gap:7px;width:max-content;
  font-size:12px;font-weight:600;letter-spacing:.06em;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  padding:5px 11px;border-radius:999px;
}
.kicker i{width:6px;height:6px;border-radius:50%;background:#fff;display:block}
.feature h2{margin:16px 0 10px;font-size:28px;line-height:1.34;letter-spacing:-.3px;color:var(--ink)}
.feature h2 a{color:inherit}
.feature p{margin:0;color:var(--muted);font-size:15px;line-height:1.7}
.feature-more{display:inline-flex;margin-top:18px;font-size:14px;font-weight:600;color:var(--link)}
.meta{margin-top:16px;color:#8b93a3;font-size:13px;display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.dot{width:3px;height:3px;border-radius:50%;background:#c9ced9;flex:0 0 auto}

.section-head{display:flex;align-items:baseline;gap:14px;margin:0 0 18px}
.section-head h2{margin:0;font-size:20px;letter-spacing:-.2px;color:var(--ink)}
.section-head span{font-size:13px;color:#9aa3b2}
.section-head .line{flex:1;height:1px;background:var(--line);transform:translateY(-4px)}

.blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;
  display:flex;flex-direction:column;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.card:hover{box-shadow:0 16px 36px -20px rgba(44,62,80,.30);transform:translateY(-3px);border-color:#dde1ec}
.card-cover{aspect-ratio:16/9;overflow:hidden;background:#eceef4;display:block}
.card-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}
.card:hover .card-cover img{transform:scale(1.035)}
.card-body{padding:17px 18px 19px;display:flex;flex-direction:column;gap:8px;flex:1}
.tag{
  display:inline-flex;align-items:center;width:max-content;
  font-size:11.5px;font-weight:600;color:#4f46e5;background:#eef0ff;
  border-radius:999px;padding:2px 9px;letter-spacing:.01em;
}
.card h3{margin:1px 0 0;font-size:17px;line-height:1.48;letter-spacing:-.1px;color:var(--ink)}
.card h3 a{color:inherit}
.card h3 a:hover{color:var(--link)}
.card p{
  margin:0;color:var(--muted);font-size:13.8px;line-height:1.68;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card .meta{margin-top:auto;padding-top:10px;font-size:12px;border-top:1px dashed #eef0f4}

/* ── pager ────────────────────────────────────────────────────────────── */
.pager{display:flex;align-items:center;justify-content:center;gap:7px;padding:46px 0 58px;flex-wrap:wrap}
.pager a,.pager span{
  min-width:38px;height:38px;padding:0 11px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;font-size:13.5px;color:#4b5563;background:#fff;
  transition:border-color .15s ease,color .15s ease,background .15s ease;
}
.pager a:hover{border-color:#c9cee6;color:var(--ink)}
.pager .on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.pager .gap,.pager .note{border:0;background:transparent;color:#9aa3b2;padding:0 2px}
.pager .note{margin-left:10px;font-size:12.5px;min-width:0}
.pager .pager-arrow{font-size:16px}
.pager .disabled{opacity:.35}
.search-empty{padding:54px 20px 80px;text-align:center;border:1px dashed var(--line);border-radius:16px;margin-top:28px}
.search-empty b{display:block;color:var(--ink);font-size:17px}
.search-empty span{display:block;margin-top:6px;color:var(--muted);font-size:14px}

/* ── article head + hero ──────────────────────────────────────────────── */
.post-head{
  padding-block:38px 0;
  background:
    radial-gradient(620px 240px at 8% -20%,rgba(99,102,241,.09),transparent 70%),
    radial-gradient(520px 220px at 92% -30%,rgba(118,75,162,.08),transparent 70%);
}
.post-head h1{
  margin:16px 0 14px;max-width:900px;font-size:42px;line-height:1.24;
  letter-spacing:-.8px;color:var(--ink);
}
.lede{margin:0 0 20px;max-width:820px;font-size:17.5px;line-height:1.75;color:#5b6574}
.byline{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding-bottom:28px;
  color:#8b93a3;font-size:13.5px}
.byline b{color:#4b5563;font-weight:600}
.avatar{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-size:13px;font-weight:700;
  background:linear-gradient(135deg,#ff7a45,#2d8cff);
}
.post-hero{
  margin:0;border-radius:18px;overflow:hidden;background:#eceef4;aspect-ratio:21/9;
  box-shadow:0 24px 60px -40px rgba(44,62,80,.55);
}
.post-hero img{width:100%;height:100%;object-fit:cover;display:block}
.post-caption{font-size:12.5px;color:#9aa3b2;margin:9px 2px 0}

/* ── article body + toc ───────────────────────────────────────────────── */
.layout{
  display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:56px;
  max-width:1104px;margin:0 auto;padding-block:46px 20px;
}
.layout.no-toc{grid-template-columns:minmax(0,760px);max-width:808px}
.post-body{max-width:760px;min-width:0;font-size:16.5px;line-height:1.85}
.post-body h2{
  margin:42px 0 14px;font-size:26px;line-height:1.4;letter-spacing:-.3px;
  color:var(--ink);scroll-margin-top:90px;
}
.post-body h2:first-child{margin-top:0}
.post-body h3{margin:28px 0 10px;font-size:19px;color:var(--ink)}
.post-body p{margin:0 0 18px}
.post-body ul,.post-body ol{margin:0 0 18px;padding-left:22px}
.post-body li{margin:6px 0}
.post-body strong{color:var(--ink)}
.post-body table{width:100%;border-collapse:collapse;margin:12px 0 22px;font-size:14.5px}
.table-wrap{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:12px 0 22px}
.table-wrap table{margin:0}
.post-body th,.post-body td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top}
.post-body th{background:var(--panel);font-weight:600;color:var(--ink)}
.post-body tr:nth-child(even) td{background:#fcfcfd}
.post-body pre{
  margin:14px 0 22px;padding:17px 19px;overflow:auto;border-radius:12px;
  background:#1f2937;color:#e5e7eb;font-size:13.5px;line-height:1.65;
}
.post-body code{background:#f8f8f8;border:1px solid #efefef;border-radius:6px;padding:1px 6px;font-size:14px}
.post-body pre code{background:none;border:0;padding:0;color:inherit}
.post-body blockquote{
  margin:22px 0;padding:15px 18px;border-left:3px solid var(--brand);
  background:var(--panel);border-radius:0 12px 12px 0;color:#374151;
}
.post-body img{height:auto}
.back-link{margin:30px 0 0;font-size:14px;color:var(--muted)}
.back-link a{color:var(--muted)}

.toc{position:sticky;top:88px;align-self:start;font-size:14px}
.toc-title{font-size:11.5px;font-weight:700;letter-spacing:.09em;color:#9aa3b2;margin-bottom:12px}
.toc a{
  display:block;padding:6px 12px;margin:0 -12px;border-left:2px solid transparent;
  border-radius:8px;color:#5b6574;line-height:1.5;
}
.toc a:hover{background:var(--panel);color:var(--ink)}
.toc a.on{color:var(--link);font-weight:600;background:#eef0ff;border-left-color:var(--brand)}
.toc-share{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:12.5px;color:#9aa3b2}
.toc-copy{
  margin-top:8px;padding:5px 10px;border:1px solid var(--line);border-radius:8px;
  background:#fff;color:#4b5563;font-size:12.5px;cursor:pointer;
}
.toc-copy:hover{border-color:#c9cee6;color:var(--ink)}

/* ── CTA / docs / related ─────────────────────────────────────────────── */
.cta{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin:34px 0 8px;padding:24px 26px;border:1px solid #e4e6fb;border-radius:16px;
  background:linear-gradient(120deg,#f6f6ff,#faf7ff);
}
.cta h3{margin:0 0 4px;font-size:18px;color:var(--ink)}
.cta p{margin:0;color:#6b7280;font-size:14px}
.cta-actions{display:flex;gap:10px;flex-wrap:wrap}
.cta .btn{
  display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:9px;
  border:1px solid var(--line);background:#fff;color:#4b5563;font-size:14px;font-weight:600;
}
.cta .btn:hover{border-color:#c9cee6;color:var(--ink)}
.cta .btn-primary{
  border:0;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 6px 18px -6px rgba(99,102,241,.6);
}
.cta .btn-primary:hover{color:#fff;box-shadow:0 8px 22px -6px rgba(99,102,241,.7)}

.doc-links{
  margin:30px 0 4px;padding:18px 20px;border:1px solid var(--line);
  border-radius:14px;background:var(--panel);
}
.doc-links h2{margin:0 0 10px;font-size:17px;color:var(--ink)}
.doc-links ul{margin:0;padding-left:20px}
.doc-links li{padding:3px 0}

.related{margin-top:20px;border-top:1px solid var(--line);padding-block:38px 6px}
.related-head{display:flex;align-items:baseline;gap:12px;margin-bottom:20px}
.related-head h2{margin:0;font-size:21px;color:var(--ink);letter-spacing:-.2px}
.related-head span{font-size:13px;color:#9aa3b2}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.related-card .card-body{padding:14px 16px 16px}
.related-card .tag{font-size:11px;padding:2px 8px}
.related-card h3{margin:8px 0 6px;font-size:15px;line-height:1.5}
.related-more{margin-top:20px;padding-top:16px;border-top:1px dashed var(--line)}
.related-more>span{font-size:12.5px;color:#9aa3b2}
.related-more ul{display:flex;flex-wrap:wrap;gap:8px 18px;margin:8px 0 0;padding:0;list-style:none}
.related-more li{font-size:13.5px;line-height:1.6}

/* ── footer ───────────────────────────────────────────────────────────── */
.site-footer{border-top:1px solid var(--line);background:var(--panel);color:#8b93a3;font-size:13.5px}
.site-footer .wrap{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding-block:28px}
.site-footer a{color:#4b5563}
.foot-brand{font-weight:700;color:var(--ink)}
.foot-note{width:100%;color:#9aa3b2;font-size:12.5px}

/* ── responsive ───────────────────────────────────────────────────────── */
@media (min-width:901px){
  aside.blog-drawer{display:none}
}
@media (max-width:980px){
  .filter-row{flex-wrap:wrap}
  .chips{width:100%}
  .filter-note{width:100%;margin-left:0}
  .feature{grid-template-columns:1fr}
  .feature-cover{min-height:260px;aspect-ratio:16/9}
  .feature-body{padding:26px 26px 30px}
  .blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .blog-head h1{font-size:34px}
  .search{flex:1 1 100%;margin-left:0}
  .layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .post-head h1{font-size:32px}
  .lede{font-size:16px}
  .post-hero{aspect-ratio:16/9}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .blog-head{padding-block:30px 24px}
  .blog-head h1{font-size:29px}
  .sub{font-size:15px}
  .filter-row{flex-wrap:wrap;padding-block:10px}
  .chips{width:100%;padding-bottom:2px;
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 26px),transparent 100%);
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 26px),transparent 100%)}
  .filter-note{width:100%;margin-left:0}
  .feature{margin-top:22px}
  .feature-cover{min-height:0}
  .blog-grid{grid-template-columns:1fr;gap:18px}
  .pager .note{width:100%;text-align:center;margin:8px 0 0}
  .post-head h1{font-size:27px}
  .post-body{font-size:16px}
  .post-body table{font-size:13px}
  .table-wrap table{min-width:560px}
  .table-wrap{
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 22px),transparent 100%);
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 22px),transparent 100%);
  }
  .post-body th,.post-body td{padding:8px 9px}
  .byline .upd{display:none}
  .related-grid{grid-template-columns:1fr}
  .cta{padding:22px}
}