/* SmartSolo 产品资料中心 —— 基础样式 */
:root {
  --c-primary: #80BF28;
  --c-primary-dark: #5B8B15;
  --c-accent: #4A7A0E;
  --c-accent-hover: #80BF28;
  --c-brand: #80BF28;
  --c-bg: #f6f8fb;
  --c-surface: #ffffff;
  --c-border: #e4e8ee;
  --c-text: #1a1f2b;
  --c-text-soft: #5b6474;
  --c-text-mute: #8b93a2;
  --c-danger: #d84a4a;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(74,122,14,.08), 0 2px 8px rgba(74,122,14,.05);
  --shadow-md: 0 4px 16px rgba(74,122,14,.12);
  --maxw: 1180px;
  --gap: 24px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { height: 100%; }
body {
    min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; }

a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-accent-hover); }
img { max-width: 100%; display: block; }

/* ---------- Header ---------- */
.site-header {
  background: var(--c-primary);
  color: #fff;
  border-bottom: 1px solid var(--c-primary-dark);
}
.site-header .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #fff;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: .5px;
}
.brand-logo {
  height: 38px;
  width: auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.brand small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: #c8e6b8;
  margin-top: 2px;
}
.nav {
  display: flex;
  gap: 4px;
}
.nav a {
  color: #eef7d9;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 14px;
  transition: background .15s, color .15s;
}
.nav a:hover, .nav a.active {
  background: rgba(255,255,255,.08);
  color: #fff;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: #fff;
  padding: 56px 24px 72px;
}
.hero .inner {
  max-width: var(--maxw);
  margin: 0 auto;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: 32px;
  font-weight: 600;
  letter-spacing: .5px;
}
.hero p {
  margin: 0;
  color: #eef7d9;
  font-size: 16px;
  max-width: 720px;
}

/* ---------- Layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 32px 24px 64px; }
.section-title {
  margin: 0 0 20px;
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: "";
  width: 4px; height: 18px;
  background: var(--c-accent);
  border-radius: 2px;
}
.section + .section { margin-top: 40px; }

/* ---------- Breadcrumb ---------- */
.crumbs {
  color: var(--c-text-mute);
  font-size: 13px;
  margin-bottom: 20px;
}
.crumbs a { color: var(--c-text-soft); }
.crumbs a:hover { color: var(--c-accent); }
.crumbs .sep { margin: 0 8px; color: var(--c-text-mute); }

/* ---------- Product cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap);
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}
.card .tag {
  display: inline-block;
  align-self: flex-start;
  background: #eef7e0;
  color: var(--c-primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.card h3 {
  margin: 0;
  font-size: 18px;
  color: var(--c-text);
}
.card p {
  margin: 0;
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.65;
}
.card .card-cta {
  margin-top: auto;
  padding-top: 8px;
  color: var(--c-accent);
  font-size: 14px;
  font-weight: 500;
}
.card a.card-cover { color: inherit; display: contents; }

/* ---------- Resource list (docs / videos) ---------- */
.res-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}
.res-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: border-color .15s, box-shadow .15s;
}
.res-item:hover {
  border-color: var(--c-accent);
  box-shadow: var(--shadow-sm);
}
.res-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: grid; place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 11px;
  flex-shrink: 0;
}
.res-icon.pdf   { background: #d84a4a; }
.res-icon.doc   { background: #2b7de9; }
.res-icon.ppt   { background: #e07a1a; }
.res-icon.xls   { background: #2ba36a; }
.res-icon.video { background: #7c3aed; }
.res-icon.link  { background: var(--c-brand); }
.res-icon.img   { background: #0891b2; }
.res-body { flex: 1; min-width: 0; }
.res-title {
  color: var(--c-text);
  font-weight: 500;
  font-size: 15px;
  margin: 0 0 4px;
  word-break: break-all;
}
.res-title a { color: var(--c-text); }
.res-title a:hover { color: var(--c-accent); }
.res-meta {
  color: var(--c-text-mute);
  font-size: 12px;
}

/* ---------- Video block ---------- */
.video-block {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.video-block h4 {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 500;
}
.video-block video {
  width: 100%;
  border-radius: 6px;
  background: #000;
}

/* ---------- Screenshot gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.gallery a {
  display: block;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color .15s, transform .15s;
}
.gallery a:hover {
  border-color: var(--c-accent);
  transform: translateY(-1px);
}
.gallery img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}
.gallery .caption {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--c-text-mute);
  word-break: break-all;
  border-top: 1px solid var(--c-border);
}

/* ---------- Product hero (detail page) ---------- */
.prod-hero {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}
.prod-hero .tag {
  display: inline-block;
  background: #eef7e0;
  color: var(--c-primary);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}
.prod-hero h1 {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 600;
}
.prod-hero p {
  margin: 0;
  color: var(--c-text-soft);
  max-width: 780px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #2f4a10;
  color: #b5cf8f;
  padding: 28px 24px;
  text-align: center;
  font-size: 13px;
  margin-top: 40px;
}
.site-footer a { color: #dcefc0; }

/* ---------- Utility ---------- */
.notice {
  background: #fff8e1;
  border: 1px solid #f5d76e;
  color: #7a5c00;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .site-header .inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .nav { flex-wrap: wrap; }
  .hero { padding: 40px 20px 48px; }
  .hero h1 { font-size: 24px; }
  .prod-hero { padding: 22px; }
  .prod-hero h1 { font-size: 22px; }
  main { padding: 20px 16px 40px; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--c-primary);
  background: var(--c-primary);
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, border-color .15s;
  font-family: inherit;
}
.btn:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; }
.btn-primary { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.btn-secondary {
  background: #fff;
  border-color: var(--c-border);
  color: var(--c-text-soft);
}
.btn-secondary:hover { background: #f5f7fa; color: var(--c-primary); border-color: var(--c-primary); }
.btn-danger {
  background: #fff;
  border-color: #d84a4a;
  color: #d84a4a;
}
.btn-danger:hover { background: #d84a4a; color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; padding: 10px; font-size: 15px; }

.res-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ---------- 视频块补充 ---------- */
.video-meta {
  font-size: 12px;
  color: var(--c-text-mute);
  font-weight: normal;
  margin-left: 8px;
}
.video-actions { margin-top: 10px; text-align: right; }

/* ---------- 腾讯文档嵌入 ---------- */
.tencent-doc {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}
.tencent-head {
  padding: 12px 18px;
  border-bottom: 1px solid var(--c-border);
  background: #fafbfc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.tencent-head h4 { margin: 0; font-size: 15px; font-weight: 500; }
.tencent-frame {
  width: 100%;
  height: 640px;
  border: 0;
  display: block;
  background: #f5f7fa;
}
@media (max-width: 720px) {
  .tencent-frame { height: 480px; }
}

/* QQ 图标特色（腾讯文档标） */
.res-icon.link { background: #0091e0; }