:root{
  --paper:#F4F7FE; --ink:#1B2559; --ink-soft:#707EAE;
  --accent:#422AFB; --accent-grad:#868CFF; --accent-tint:rgba(66,42,251,0.08); --line:#E9EDF7; --radius:16px; --maxw:780px;
  --danger:#E31A1A; --card-bg:#FFFFFF; --success:#01B574; --warn:#FFB547;
  --shadow-card:0 18px 40px -12px rgba(112,144,176,0.18);
}
html[data-theme="dark"]{
  --paper:#0B1437; --ink:#E9EDF7; --ink-soft:#A3AED0;
  --accent:#7551FF; --accent-grad:#868CFF; --accent-tint:rgba(117,81,255,0.16); --line:#1B254B; --card-bg:#111C44;
  --shadow-card:0 18px 40px -12px rgba(0,0,0,0.4);
}
*{box-sizing:border-box; margin:0; padding:0;}
body{ background:var(--paper); color:var(--ink); font-family:'DM Sans',sans-serif; line-height:1.65; transition:background .2s ease, color .2s ease; letter-spacing:-0.1px; }
h1,h2,h3{ font-family:'Poppins',sans-serif; font-weight:700; color:var(--ink); letter-spacing:-0.3px; }
.mono{ font-family:'DM Mono','DM Sans',monospace; }
a{ color:inherit; }
img{ max-width:100%; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }

header.site{ position:sticky; top:0; z-index:50; background:var(--paper); border-bottom:1px solid var(--line); }
header.site .wrap{ display:flex; align-items:center; gap:16px; height:68px; max-width:1200px; }
.brand{ display:flex; align-items:center; gap:10px; font-weight:700; font-family:'Poppins',sans-serif; font-size:1.05rem; flex-shrink:0; text-decoration:none; color:var(--ink); }
.brand-text{ display:flex; flex-direction:column; line-height:1.2; }
.brand-name{ font-weight:700; }
.brand-tagline{ font-family:'DM Sans',sans-serif; font-weight:400; font-size:0.68rem; color:var(--ink-soft); }
.avatar{ width:34px; height:34px; border-radius:12px; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; display:flex; align-items:center; justify-content:center; font-size:0.78rem; font-weight:700; flex-shrink:0; overflow:hidden; }
.avatar img{ width:100%; height:100%; object-fit:cover; border-radius:12px; }
nav.links{ display:flex; gap:2px; align-items:center; flex-wrap:nowrap; overflow-x:auto; scrollbar-width:none; min-width:0; }
nav.links::-webkit-scrollbar{ display:none; }
nav.links a{ text-decoration:none; font-size:0.8rem; font-weight:600; color:var(--ink-soft); white-space:nowrap; padding:9px 14px; border-radius:999px; transition:background .15s ease, color .15s ease; flex-shrink:0; }
nav.links a:hover{ background:var(--accent-tint); color:var(--ink); }
nav.links a.on{ background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; }

.nav-dropdown{ position:relative; flex-shrink:0; }
.nav-dropdown-toggle{ display:inline-flex; align-items:center; gap:4px; }
.nav-caret{ font-size:0.6rem; }
.nav-dropdown-panel{
  display:none; position:absolute; top:calc(100% + 8px); left:0; min-width:200px;
  background:var(--card-bg); border-radius:14px; box-shadow:var(--shadow-card); padding:8px; z-index:60;
}
.nav-dropdown-panel a{ display:block; padding:9px 14px; border-radius:10px; text-decoration:none; font-size:0.8rem; font-weight:600; color:var(--ink-soft); white-space:nowrap; }
.nav-dropdown-panel a:hover, .nav-dropdown-panel a.on{ background:var(--accent-tint); color:var(--accent); }
.nav-dropdown:hover .nav-dropdown-panel, .nav-dropdown:focus-within .nav-dropdown-panel{ display:block; }
.header-right{ margin-left:auto; display:flex; align-items:center; gap:12px; flex-shrink:0; }
.theme-btn{ background:var(--card-bg); border:none; box-shadow:var(--shadow-card); border-radius:50%; width:38px; height:38px; display:flex; align-items:center; justify-content:center; cursor:pointer; color:var(--ink); font-size:0.95rem; flex-shrink:0; }

.bottom-nav{ display:none; }
@media (max-width:920px){
  nav.links{ display:none; }
  body{ padding-bottom:70px; }
  .bottom-nav{
    display:flex; position:fixed; left:12px; right:12px; bottom:12px; z-index:80;
    background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card);
    padding:8px 4px calc(env(safe-area-inset-bottom, 0px) + 8px);
  }
  .bottom-nav a{ flex:1; display:flex; flex-direction:column; align-items:center; gap:2px; text-decoration:none; color:var(--ink-soft); font-size:0.62rem; padding:6px 2px; border-radius:14px; font-weight:600; }
  .bottom-nav a .bn-icon{ font-size:1.15rem; line-height:1; }
}

.hero{ padding:56px 0 40px; }
.hero-inner{ display:flex; gap:22px; align-items:flex-start; }
.hero-avatar{ width:64px; height:64px; border-radius:20px; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; display:flex; align-items:center; justify-content:center; font-size:1.3rem; font-weight:700; flex-shrink:0; overflow:hidden; box-shadow:var(--shadow-card); }
.hero-avatar img{ width:100%; height:100%; object-fit:cover; border-radius:20px; }
.hero h1{ font-size:1.7rem; margin-bottom:10px; }
.hero p.lede-text{ color:var(--ink-soft); max-width:60ch; font-size:0.98rem; }
.cta-link{ display:inline-flex; align-items:center; gap:6px; margin-top:18px; font-size:0.86rem; font-weight:700; color:#fff; text-decoration:none; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); border:none; cursor:pointer; padding:11px 22px; border-radius:12px; box-shadow:var(--shadow-card); }
.cta-link:hover{ opacity:0.92; }

section.block{ padding:36px 0; scroll-margin-top:90px; }
.block-head{ margin-bottom:20px; display:flex; justify-content:space-between; align-items:flex-end; gap:12px; flex-wrap:wrap; }
.block-head h2{ font-size:1.25rem; }
.block-head .block-sub{ color:var(--ink-soft); font-size:0.85rem; margin-top:4px; }
.block-head .see-all{
  display:inline-flex; align-items:center; gap:4px;
  font-size:0.74rem; font-weight:700; color:var(--accent); background:var(--accent-tint);
  text-decoration:none; white-space:nowrap; padding:8px 14px; border-radius:999px;
  border:none; flex-shrink:0; transition:background .15s ease;
}
.block-head .see-all:hover{ background:var(--accent); color:#fff; }

.post-list{ display:flex; flex-direction:column; background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card); overflow:hidden; }
.post-item{ padding:16px 20px; border-top:1px solid var(--line); font-size:0.97rem; display:flex; justify-content:space-between; gap:12px; }
.post-item:first-child{ border-top:none; }
.post-item a.ptitle{ text-decoration:none; font-weight:600; }
.post-item a.ptitle:hover{ color:var(--accent); }
.post-date{ font-family:'DM Sans',monospace; font-size:0.7rem; color:var(--ink-soft); white-space:nowrap; }
.post-cat-tag{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.62rem; color:var(--accent); background:var(--accent-tint); padding:3px 9px; border-radius:999px; margin-right:8px; }
.empty-note{ color:var(--ink-soft); font-size:0.88rem; padding:20px; }

.pub-list{ display:flex; flex-direction:column; background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card); overflow:hidden; }
.pub-item{ padding:18px 20px; border-top:1px solid var(--line); display:flex; justify-content:space-between; align-items:flex-start; gap:16px; }
.pub-item:first-child{ border-top:none; }
.pub-tag{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.62rem; color:var(--accent); background:var(--accent-tint); padding:3px 9px; border-radius:999px; display:inline-block; margin-bottom:6px; }
.pub-title{ font-size:0.96rem; font-weight:600; cursor:pointer; }
.pub-title:hover{ color:var(--accent); }
.pub-link{ font-size:0.74rem; font-weight:700; color:#fff; text-decoration:none; white-space:nowrap; flex-shrink:0; background:var(--accent); padding:8px 14px; border-radius:999px; }
.pub-link:hover{ opacity:0.9; }

.proj-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:16px; }
.proj-card{ background:var(--card-bg); padding:22px; cursor:pointer; border-radius:20px; box-shadow:var(--shadow-card); transition:transform .15s ease; }
.proj-card:hover{ transform:translateY(-3px); }
.proj-card .proj-tag{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.62rem; color:var(--accent); text-transform:uppercase; }
.proj-card h3{ font-size:1rem; font-weight:700; margin:8px 0; }
.proj-card p{ color:var(--ink-soft); font-size:0.85rem; }

.article-head{ padding:44px 0 4px; }
.article-head h1{ font-size:1.7rem; margin-bottom:8px; }
.article-meta{ font-size:0.85rem; color:var(--ink-soft); }
.article-cover{ margin:22px 0; border-radius:20px; overflow:hidden; box-shadow:var(--shadow-card); }
.article-cover img{ width:100%; display:block; }
.article-body{ padding:6px 0 50px; font-size:1rem; max-width:70ch; }
.article-body p{ margin-bottom:16px; }
.article-body img{ border-radius:16px; margin:10px 0; }
.article-body a{ color:var(--accent); text-decoration:underline; }
.back-link{ display:inline-block; margin:16px 0 0; font-size:0.85rem; font-weight:700; color:var(--accent); text-decoration:none; }

.page-head{ padding:48px 0 8px; }
.page-head h1{ font-size:1.9rem; }
.about-photo{ width:120px; height:120px; border-radius:24px; overflow:hidden; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); display:flex; align-items:center; justify-content:center; color:#fff; font-size:2rem; font-weight:700; margin:20px 0 26px; box-shadow:var(--shadow-card); }
.about-photo img{ width:100%; height:100%; object-fit:cover; }
.about-body{ padding:0 0 60px; max-width:65ch; }
.about-body p{ color:var(--ink-soft); margin-bottom:16px; font-size:0.98rem; }

.contact-body{ padding:20px 0 60px; max-width:56ch; }
.contact-body p.intro{ color:var(--ink-soft); margin-bottom:22px; }
.contact-list{ list-style:none; background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card); overflow:hidden; }
.contact-list li{ padding:16px 20px; border-top:1px solid var(--line); display:flex; justify-content:space-between; align-items:center; font-size:0.92rem; }
.contact-list li:first-child{ border-top:none; }
.contact-list .k{ color:var(--ink-soft); font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.72rem; }
.contact-list a{ color:var(--accent); text-decoration:none; font-weight:600; }

footer.site{ padding:30px 0; text-align:center; font-size:0.76rem; color:var(--ink-soft); }
footer.site .footer-copyright{ margin-bottom:8px; }
footer.site .footer-legal-links{ font-size:0.74rem; }
footer.site .footer-legal-links a{ color:var(--ink-soft); text-decoration:none; }
footer.site .footer-legal-links a:hover{ color:var(--accent); text-decoration:underline; }
footer.site .footer-legal-links span{ margin:0 6px; }

.field{ margin-bottom:14px; }
.field label{ display:block; font-size:0.75rem; font-weight:700; margin-bottom:6px; color:var(--ink-soft); }
.field input, .field textarea, .field select{ width:100%; padding:11px 14px; border:1px solid var(--line); font-family:inherit; font-size:0.88rem; border-radius:12px; background:var(--paper); color:var(--ink); }
.field input:focus, .field textarea:focus, .field select:focus{ outline:none; border-color:var(--accent); }
.field textarea{ resize:vertical; min-height:60px; }
.field-note{ font-size:0.72rem; color:var(--ink-soft); margin-top:5px; line-height:1.5; }
.btn{ display:inline-flex; align-items:center; gap:8px; padding:12px 22px; font-size:0.85rem; font-weight:700; border:none; cursor:pointer; border-radius:12px; }
.btn-primary{ background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; width:100%; justify-content:center; box-shadow:var(--shadow-card); }
.btn-primary:hover{ opacity:0.92; }
.btn-secondary{ background:var(--card-bg); border:1px solid var(--line); color:var(--ink); }
.hint{ font-size:0.73rem; color:var(--ink-soft); margin-top:12px; }
.err{ color:var(--danger); font-size:0.78rem; margin-bottom:10px; display:none; background:rgba(227,26,26,0.08); padding:10px 14px; border-radius:12px; }
.err.show{ display:block; }

.search-box{ margin:20px 0 4px; }
.search-box input{ width:100%; padding:14px 18px; border:none; border-radius:14px; font-family:inherit; font-size:0.92rem; background:var(--card-bg); color:var(--ink); box-shadow:var(--shadow-card); }
.trx-filters{ display:flex; gap:8px; flex-wrap:wrap; margin:16px 0; }
.trx-filter{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.72rem; padding:9px 16px; border:none; background:var(--card-bg); cursor:pointer; color:var(--ink-soft); border-radius:999px; text-decoration:none; display:inline-block; box-shadow:var(--shadow-card); }
.trx-filter.active{ color:#fff; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); }

.shop-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:18px; margin:24px 0 60px; }
.shop-card{ background:var(--card-bg); padding:0; display:flex; flex-direction:column; border-radius:20px; box-shadow:var(--shadow-card); overflow:hidden; }
.shop-cover{ aspect-ratio:4/3; background:var(--accent-tint); display:flex; align-items:center; justify-content:center; overflow:hidden; color:var(--accent); font-size:2rem; }
.shop-cover img{ width:100%; height:100%; object-fit:cover; }
.shop-body{ padding:18px; display:flex; flex-direction:column; gap:8px; flex-grow:1; }
.shop-cat{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.62rem; color:var(--accent); text-transform:uppercase; }
.shop-body h3{ font-size:1rem; font-weight:700; }
.shop-body p{ color:var(--ink-soft); font-size:0.85rem; flex-grow:1; }
.shop-price{ font-weight:800; font-size:1.05rem; margin-top:6px; }
.shop-buy-btn{ margin-top:10px; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; border:none; padding:12px; border-radius:12px; font-size:0.85rem; font-weight:700; cursor:pointer; text-decoration:none; text-align:center; }

.checkout-wrap{ max-width:520px; margin:24px auto 60px; }
.checkout-summary{ background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card); padding:20px; display:flex; gap:14px; align-items:center; margin-bottom:24px; }
.checkout-summary .cover{ width:74px; height:60px; border-radius:12px; flex-shrink:0; background:var(--accent-tint); display:flex; align-items:center; justify-content:center; overflow:hidden; }
.checkout-summary .cover img{ width:100%; height:100%; object-fit:cover; }
.pay-methods{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin:16px 0 22px; }
.pay-method{ border:1px solid var(--line); border-radius:12px; padding:13px; cursor:pointer; font-size:0.82rem; text-align:center; font-weight:600; }
.pay-method input{ margin-right:6px; }
.checkout-total{ display:flex; justify-content:space-between; font-size:1.05rem; font-weight:800; border-top:1px solid var(--line); padding-top:14px; margin-bottom:18px; }

.success-box{ max-width:480px; margin:60px auto; text-align:center; padding:0 20px; }
.success-icon{ font-size:3.2rem; margin-bottom:10px; }
.download-btn{ display:inline-flex; align-items:center; gap:8px; background:linear-gradient(135deg, var(--accent-grad), var(--accent)); color:#fff; text-decoration:none; padding:13px 24px; border-radius:12px; font-size:0.9rem; font-weight:700; margin-bottom:12px; box-shadow:var(--shadow-card); }

.track-result-card{ background:var(--card-bg); border-radius:20px; box-shadow:var(--shadow-card); padding:22px; }
.track-empty{ border:1px dashed var(--line); border-radius:16px; padding:22px; text-align:center; color:var(--ink-soft); font-size:0.9rem; }
.track-order-banner{ margin-top:20px; border-radius:16px; padding:16px 20px; font-size:0.88rem; font-weight:600; color:var(--accent); text-decoration:none; display:block; background:var(--accent-tint); }

.status-badge{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.62rem; padding:4px 11px; border-radius:999px; white-space:nowrap; display:inline-block; }
.status-published, .status-paid{ background:rgba(1,181,116,0.12); color:var(--success); }
.status-pending{ background:rgba(255,181,71,0.16); color:#B5811F; }
.status-failed{ background:rgba(227,26,26,0.1); color:var(--danger); }

.modal-overlay{ display:none; position:fixed; inset:0; background:rgba(11,20,55,0.55); z-index:300; align-items:center; justify-content:center; padding:20px; }
.modal-overlay.open{ display:flex; }
.modal-box{ background:var(--card-bg); border-radius:24px; max-width:520px; width:100%; max-height:80vh; overflow-y:auto; padding:30px; position:relative; box-shadow:var(--shadow-card); }
.modal-close{ position:absolute; top:18px; right:18px; background:var(--accent-tint); border:none; border-radius:50%; width:32px; height:32px; cursor:pointer; color:var(--accent); font-size:1rem; }
.modal-tag{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.65rem; color:var(--accent); background:var(--accent-tint); padding:4px 11px; border-radius:999px; display:inline-block; margin-bottom:10px; }
.modal-box h3{ font-size:1.15rem; margin-bottom:6px; padding-right:30px; }
.modal-date{ font-size:0.78rem; color:var(--ink-soft); margin-bottom:16px; }
.modal-abstract-label{ font-family:'DM Sans',sans-serif; font-weight:700; font-size:0.68rem; color:var(--ink-soft); text-transform:uppercase; margin-bottom:6px; }
.modal-abstract{ font-size:0.92rem; color:var(--ink); margin-bottom:20px; white-space:pre-wrap; }

@media (max-width:760px){
  .hero-inner{ flex-direction:column; }
  .pub-item{ flex-direction:column; }
  .pay-methods{ grid-template-columns:1fr; }
}