:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --ink: #172033;
  --muted: #657089;
  --line: #e4e8f0;
  --surface: #fff;
  --soft: #f5f7fb;
  --navy: #111827;
  --danger: #c2414c;
  font-family: Inter, "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--surface); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.site-header { height: 76px; max-width: 1180px; margin: auto; padding: 0 24px; display: flex; align-items: center; gap: 48px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; flex-direction: column; gap: 3px; white-space: nowrap; }
.brand strong { font-size: 18px; }
.brand strong span { color: var(--blue); }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: .03em; }
.site-header nav { display: flex; gap: 30px; margin-left: auto; height: 100%; align-items: center; }
.site-header nav a { height: 100%; display: grid; place-items: center; color: #4a556c; font-size: 14px; border-bottom: 2px solid transparent; }
.site-header nav a:hover, .site-header nav a.active { color: var(--blue); border-color: var(--blue); }
main { max-width: 1180px; margin: auto; padding: 0 24px; }
.tool-hero { text-align: center; padding: 72px 20px 54px; background: radial-gradient(circle at 50% 10%, #edf4ff, transparent 45%); }
.eyebrow, .kicker { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.eyebrow-open-source { color: #16a34a; }
.tool-hero h1 { margin: 12px 0; font-size: clamp(38px, 6vw, 64px); line-height: 1.1; letter-spacing: -.05em; }
.tool-hero h1 span { color: var(--blue); }
.tool-hero > p, .page-title p { color: var(--muted); font-size: 17px; }
.tool-hero > p a { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }
.tool-hero > p a:hover { color: #1d4ed8; }
.search { max-width: 650px; margin: 32px auto 18px; display: flex; padding: 7px; border: 1px solid #d7deeb; border-radius: 12px; background: white; box-shadow: 0 14px 40px #1e3a5f12; }
.search input { flex: 1; border: 0; outline: 0; padding: 10px 14px; min-width: 0; }
.search button, .button { border: 0; border-radius: 8px; background: var(--blue); color: white; font-weight: 700; padding: 12px 22px; display: inline-block; }
.search button:hover, .button:hover { background: var(--blue-dark); }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.chips a { background: #f1f4f9; color: #526078; padding: 7px 12px; border-radius: 999px; font-size: 12px; }
.section, .article-section { padding: 38px 0 60px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 22px; }
.section-heading h2 { margin: 5px 0 0; font-size: 27px; }
.section-heading > a { color: var(--blue); font-size: 13px; font-weight: 700; }
.tool-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.tool-card { position: relative; display: flex; gap: 15px; align-items: center; justify-content: space-between; padding: 19px; border: 1px solid var(--line); border-radius: 12px; background: white; transition: .2s ease; }
.tool-card:hover { transform: translateY(-2px); border-color: #b9cae8; box-shadow: 0 12px 30px #1720330d; }
.card-link { min-width: 0; flex: 1 1 auto; display: flex; gap: 15px; align-items: center; color: inherit; overflow: hidden; }
.tool-icon { width: 46px; height: 46px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 11px; background: #eaf2ff; color: var(--blue); font-size: 23px; font-weight: 800; }
.program-icon { object-fit: contain; padding: 5px; }
.tool-main { min-width: 0; flex: 1; }
.tool-title { display: flex; gap: 8px; align-items: center; }
.tool-title h3 { margin: 0; font-size: 15px; }
.tool-title span, .tool-meta { color: var(--muted); font-size: 11px; }
.tool-main p {
  color: #657089;
  font-size: 12px;
  margin: 6px 0 9px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.6;
  max-height: calc(1.6em * 2);
  white-space: normal;
  word-break: break-word;
}
.tool-meta { display: flex; gap: 15px; }
.platform-list { display: inline-flex; align-items: center; gap: 5px; }
.platform-icon { display: inline-flex; width: 17px; height: 17px; color: #56647b; }
.platform-icon svg { width: 100%; height: 100%; fill: currentColor; }
.button-small { position: relative; z-index: 2; flex: 0 0 auto; margin-left: auto; padding: 8px 13px; font-size: 12px; }
.article-section { background: var(--soft); max-width: none; width: 100vw; margin-left: calc(50% - 50vw); padding-left: max(24px, calc((100vw - 1132px) / 2)); padding-right: max(24px, calc((100vw - 1132px) / 2)); }
.article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.article-list.wide { grid-template-columns: 1fr; max-width: 850px; }
.article-row { display: grid; grid-template-columns: 120px 1fr; gap: 18px; background: white; border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.article-cover { width: 120px; height: 110px; object-fit: cover; display: grid; place-items: center; background: var(--navy); color: #9bbcff; border-radius: 8px; font-size: 20px; font-weight: 800; }
.article-row h3 { margin: 6px 0; font-size: 16px; }
.article-row h3 a:hover { color: var(--blue); }
.article-row p { color: var(--muted); font-size: 12px; line-height: 1.7; margin: 0 0 8px; }
.article-row small { color: #8a94a8; }
.tag { color: var(--blue); background: #eaf2ff; padding: 4px 8px; border-radius: 5px; font-size: 10px; font-weight: 700; }
.sponsor-strip { margin: 52px 0; padding: 34px 42px; border-radius: 16px; background: var(--navy); color: white; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.sponsor-strip h2 { margin: 8px 0; font-size: 27px; }
.sponsor-strip span { color: #8fb5ff; font-size: 12px; font-weight: 700; }
.sponsor-strip p { color: #9da9ba; margin: 0; }
.site-footer { max-width: 1180px; margin: 40px auto 0; padding: 28px 24px 18px; border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(0,1.1fr) auto minmax(280px,.9fr); grid-template-areas: "brand links contact" "beian beian contact"; gap: 12px 32px; color: var(--muted); font-size: 13px; align-items: start; }
.footer-brand { grid-area: brand; }
.footer-links { grid-area: links; }
.footer-contact { grid-area: contact; }
.footer-brand, .footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-links { display: flex; gap: 18px; align-items: center; }
.site-footer strong { color: var(--ink); }
.footer-contact span { line-height: 1.7; }
.footer-contact a { color: var(--blue); text-decoration: underline; text-underline-offset: 2px; }
.footer-contact a:hover { color: #1d4ed8; }
.site-footer small { grid-area: beian; align-self: start; margin-top: -4px; }
.site-footer small a:hover { color: var(--blue); }
.inner-page, .article-page { padding-top: 54px; padding-bottom: 70px; min-height: 65vh; }
.page-title { margin-bottom: 32px; }
.page-title h1, .article-page h1 { font-size: 42px; letter-spacing: -.04em; margin: 8px 0; }
.toolbar { display: grid; grid-template-columns: 1fr 210px auto; gap: 10px; margin-bottom: 24px; }
.toolbar input, .toolbar select, .editor-form input, .editor-form select, .editor-form textarea, .login-card input { width: 100%; border: 1px solid #d8deea; border-radius: 8px; background: white; padding: 11px 13px; outline: none; }
.toolbar input:focus, .toolbar select:focus, .editor-form input:focus, .editor-form textarea:focus, .login-card input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px #2563eb18; }
.article-page { max-width: 760px; }
.tool-detail { padding-top: 46px; padding-bottom: 72px; }
.tool-detail-hero { display: grid; grid-template-columns: minmax(300px, .85fr) 1.15fr; gap: 48px; align-items: center; padding: 36px; border: 1px solid var(--line); border-radius: 18px; background: #f7f9fd; }
.tool-detail-cover, .tool-detail-placeholder { width: 100%; aspect-ratio: 16 / 10; border-radius: 13px; object-fit: cover; background: var(--navy); }
.tool-detail-image-link { position: relative; display: block; width: 100%; overflow: hidden; padding: 0; border: 0; border-radius: 13px; background: transparent; cursor: zoom-in; }
.tool-detail-image-link span { position: absolute; right: 12px; bottom: 12px; padding: 7px 11px; border-radius: 7px; background: #111827d9; color: white; font-size: 12px; opacity: 0; transform: translateY(4px); transition: .2s ease; }
.tool-detail-image-link:hover span, .tool-detail-image-link:focus-visible span { opacity: 1; transform: translateY(0); }
.image-preview { width: min(94vw, 1600px); max-width: none; height: min(92vh, 1000px); max-height: none; padding: 0; border: 0; border-radius: 14px; overflow: hidden; background: #10141d; box-shadow: 0 30px 100px #0008; }
.image-preview::backdrop { background: #10141dcc; backdrop-filter: blur(5px); }
.image-preview img { display: block; width: 100%; height: 100%; object-fit: contain; }
.image-preview-close { position: absolute; z-index: 1; top: 14px; right: 14px; width: 38px; height: 38px; border: 1px solid #ffffff40; border-radius: 50%; background: #111827d9; color: white; font-size: 26px; line-height: 1; }
.tool-detail-placeholder { display: grid; place-items: center; color: #9bbcff; font-size: 72px; font-weight: 800; }
.tool-detail-intro h1 { margin: 12px 0; font-size: 42px; letter-spacing: -.04em; }
.tool-detail-intro > p { color: var(--muted); line-height: 1.8; font-size: 16px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 22px 0; color: var(--muted); font-size: 13px; }
.detail-download { min-width: 150px; text-align: center; }
.tool-detail-grid { max-width: 850px; margin-top: 42px; }
.back { color: var(--muted); display: block; margin-bottom: 30px; }
.article-info { color: var(--muted); font-size: 13px; }
.lead { color: #4e5b72; font-size: 20px; line-height: 1.7; border-bottom: 1px solid var(--line); padding-bottom: 30px; }
.article-hero-image { width: 100%; max-height: 430px; object-fit: cover; border-radius: 14px; margin: 12px 0 28px; }
.prose { font-size: 16px; line-height: 2; color: #303b51; }
.prose > :first-child { margin-top: 0; }
.prose > :last-child { margin-bottom: 0; }
.prose h2, .prose h3, .prose h4 { color: var(--ink); line-height: 1.4; margin: 1.4em 0 .7em; }
.prose p, .prose ul, .prose ol, .prose blockquote { margin: 0 0 1em; }
.prose ul, .prose ol { padding-left: 1.6em; }
.prose blockquote { padding: 12px 16px; border-left: 4px solid #bfd1f6; background: #f7f9fe; color: #51607a; border-radius: 0 10px 10px 0; }
.prose img { max-width: 100%; height: auto; border-radius: 12px; }
.prose a { color: var(--blue); text-decoration: underline; }
.prose span[style], .prose p[style], .prose div[style] { max-width: 100%; }
.sponsor-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; }
.sponsor-card, .funding { border: 1px solid var(--line); border-radius: 16px; padding: 30px; }
.sponsor-card { background: #f4f7ff; }
.sponsor-card p, .funding p { color: var(--muted); line-height: 1.8; }
.sponsor-qr { margin-top: 22px; display: inline-flex; flex-direction: column; align-items: center; gap: 10px; padding: 16px; border: 1px solid #d8deea; border-radius: 12px; background: white; }
.sponsor-qr img { width: min(260px, 100%); aspect-ratio: 1; object-fit: contain; display: block; }
.sponsor-qr span { color: var(--ink); font-size: 13px; font-weight: 700; }
.funding ul { list-style: none; padding: 0; }
.funding li { display: flex; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--line); }
.message { min-height: 60vh; display: grid; place-items: center; }
.empty { padding: 50px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 12px; }
.admin-body { background: #f4f6fa; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(410px, 100%); background: white; padding: 38px; border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 25px 70px #17203314; display: flex; flex-direction: column; gap: 18px; }
.login-card h1 { margin: 14px 0 2px; }
.login-card label, .editor-form label { display: flex; flex-direction: column; gap: 7px; font-size: 13px; font-weight: 700; }
.login-card > a:last-child { text-align: center; color: var(--muted); font-size: 13px; }
.form-error { color: var(--danger); margin: 0; font-size: 13px; }
.admin-layout { min-height: 100vh; display: grid; grid-template-columns: 235px 1fr; }
.admin-nav { position: sticky; top: 0; align-self: start; height: 100vh; background: var(--navy); color: #d8deea; padding: 25px 18px; display: flex; flex-direction: column; justify-content: flex-start; gap: 14px; }
.admin-nav .brand { padding: 0 10px; }
.admin-nav nav { display: flex; flex-direction: column; gap: 5px; }
.admin-nav nav a, .admin-nav > a, .admin-nav button { padding: 11px 13px; border-radius: 7px; color: #aeb8c9; font-size: 13px; background: none; border: 0; text-align: left; width: 100%; }
.admin-nav nav a:hover, .admin-nav nav a.active { color: white; background: #243047; }
.admin-nav > a { margin-top: 0; }
.admin-main { max-width: 1300px; width: 100%; margin: 0 auto; padding: 36px 42px; }
.admin-main > header span { color: var(--blue); font-size: 10px; letter-spacing: .14em; font-weight: 800; }
.admin-main > header h1 { margin: 7px 0 28px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stats div { background: white; border: 1px solid var(--line); border-radius: 12px; padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.stats span { color: var(--muted); font-size: 12px; }
.stats strong { font-size: 32px; }
.admin-panel, .editor-form { background: white; border: 1px solid var(--line); border-radius: 12px; padding: 23px; overflow-x: auto; }
.admin-panel { margin-bottom: 18px; }
.category-manager { max-width: 980px; margin-bottom: 18px; padding: 23px; border: 1px solid var(--line); border-radius: 12px; background: white; }
.category-manager .panel-heading { margin-bottom: 14px; }
.category-manager .panel-heading p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.category-add { display: grid; grid-template-columns: 1fr auto; gap: 9px; margin-bottom: 12px; }
.category-add input, .category-list input { min-width: 0; border: 1px solid #d8deea; border-radius: 7px; padding: 9px 11px; }
.category-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.category-list form { display: grid; grid-template-columns: 1fr auto auto auto; align-items: center; gap: 7px; }
.category-count { color: var(--muted); font-size: 12px; white-space: nowrap; }
.category-save, .category-delete { border: 0; background: none; padding: 7px; font-size: 12px; }
.category-save { color: var(--blue); }
.category-delete { color: var(--danger); }
.category-delete:disabled { color: #aeb6c5; cursor: not-allowed; }
.panel-heading, .admin-actions { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.panel-heading h2 { margin: 0; font-size: 18px; }
.admin-actions p { color: var(--muted); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { color: var(--muted); font-size: 11px; text-align: left; padding: 11px; border-bottom: 1px solid var(--line); }
td { padding: 14px 11px; border-bottom: 1px solid #edf0f5; }
td small { color: var(--muted); display: block; margin-top: 5px; }
.row-actions { white-space: nowrap; }
.row-actions a { color: var(--blue); }
.row-actions form { display: inline-block; margin-left: 12px; }
.row-actions button { border: 0; background: none; color: var(--danger); padding: 0; }
.status { color: #7c879c; background: #edf0f5; padding: 4px 8px; border-radius: 999px; font-size: 10px; }
.status.live { color: #237a57; background: #e4f6ed; }
.editor-form { display: flex; flex-direction: column; gap: 20px; max-width: 980px; }
.editor-form.compact { max-width: 520px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.editor-form textarea { resize: vertical; line-height: 1.7; }
.editor-form label small { font-weight: 400; color: var(--muted); }
.rich-editor { border: 1px solid #d8deea; border-radius: 10px; overflow: hidden; background: white; }
.rich-toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px; border-bottom: 1px solid var(--line); background: #f7f9fd; }
.rich-toolbar button, .rich-toolbar select { border: 1px solid #d8deea; border-radius: 8px; background: white; color: var(--ink); padding: 8px 10px; font-size: 12px; }
.rich-toolbar button:hover, .rich-toolbar select:hover { border-color: #b8c8e7; }
.color-picker { display: inline-flex !important; align-items: center; gap: 8px; flex-direction: row !important; font-size: 12px !important; font-weight: 600 !important; color: var(--muted); }
.color-picker input { width: 34px; height: 34px; padding: 3px; border-radius: 8px; }
.rich-surface, .rich-source { width: 100%; padding: 14px 16px; border: 0; outline: 0; font-size: 15px; line-height: 1.8; color: #303b51; background: white; }
.rich-surface:focus, .rich-source:focus { box-shadow: inset 0 0 0 2px #2563eb18; }
.rich-surface[contenteditable="true"]:empty::before { content: "在这里输入内容，支持字号、颜色、缩进、列表等排版样式"; color: #98a3b8; }
.rich-source { font-family: Consolas, "Courier New", monospace; resize: vertical; }
.field-note { margin: 0; padding: 13px; border-radius: 8px; background: var(--soft); color: var(--muted); font-size: 13px; }
.platform-fieldset { margin: 0; padding: 15px; border: 1px solid #d8deea; border-radius: 8px; }
.platform-fieldset legend { padding: 0 7px; font-size: 13px; font-weight: 700; }
.platform-fieldset > small { display: block; margin-top: 10px; color: var(--muted); }
.choice-grid { display: flex; flex-wrap: wrap; gap: 9px; }
.choice-option { flex-direction: row !important; align-items: center; min-width: 110px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 7px; background: var(--soft); cursor: pointer; }
.choice-option input { width: auto; margin: 0; }
.editor-form .check { flex-direction: row; align-items: center; align-self: end; min-height: 43px; }
.editor-form .check input { width: auto; }
.form-buttons { display: flex; align-items: center; gap: 18px; }
.form-buttons a { color: var(--muted); }
@media (max-width: 800px) {
  .site-header { gap: 15px; }
  .site-header nav { position: fixed; z-index: 5; bottom: 0; left: 0; right: 0; height: 56px; background: white; border-top: 1px solid var(--line); justify-content: space-around; gap: 0; }
  .tool-grid, .article-list, .sponsor-layout, .tool-detail-hero { grid-template-columns: 1fr; }
  .article-section { padding-left: 24px; padding-right: 24px; }
  .sponsor-strip { align-items: flex-start; flex-direction: column; }
  .toolbar, .form-grid { grid-template-columns: 1fr; }
  .category-list { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; grid-template-areas: "brand" "links" "contact" "beian"; padding-bottom: 85px; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-nav { position: static; }
  .admin-nav nav { flex-direction: row; overflow-x: auto; }
  .admin-nav > a, .admin-nav form { display: none; }
  .admin-main { padding: 24px 15px; }
  .stats { grid-template-columns: 1fr; }
}