/* ============================================================
   Newin Best — 子页面统一设计 (pages.css)
   延续主页简洁 B2B 风格：大留白 / 无图标堆砌 / 以数据说话
   ============================================================ */

:root {
  --nb-accent: #3a589d;
  --nb-accent-dark: #2d4478;
  --nb-ink: #1f2937;
  --nb-ink-soft: #6b7280;
  --nb-line: #e5e7eb;
  --nb-bg-soft: #f6f7f9;
}

/* ---------- 1. 页面 Hero（浅灰标题区） ---------- */
.nb-hero {
  background: var(--nb-bg-soft);
  border-bottom: 1px solid var(--nb-line);
  padding: 56px 0 52px;
}
.nb-hero h1 {
  margin: 0 0 10px;
  font-size: 38px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--nb-ink);
  letter-spacing: -0.5px;
}
.nb-hero .nb-sub {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--nb-ink-soft);
  max-width: 720px;
}
.nb-crumb {
  font-size: 13px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 14px;
}
.nb-crumb a { color: var(--nb-accent); text-decoration: none; }
.nb-crumb a:hover { text-decoration: underline; }

/* ---------- 2. 布局容器 ---------- */
.nb-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}
.nb-section { padding: 72px 0; }
.nb-section-gray { background: var(--nb-bg-soft); }
.nb-h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 0 0 8px;
  letter-spacing: -0.3px;
}
.nb-h2-sub {
  margin: 0 0 36px;
  color: var(--nb-ink-soft);
  font-size: 16px;
  line-height: 1.6;
  max-width: 680px;
}

/* ---------- 3. 按钮 ---------- */
.nb-btn {
  display: inline-block;
  background: var(--nb-accent);
  color: #fff !important;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 14px 30px;
  border-radius: 4px;
  text-decoration: none !important;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease;
}
.nb-btn:hover { background: var(--nb-accent-dark); color: #fff !important; }
.nb-btn-ghost {
  display: inline-block;
  color: var(--nb-accent) !important;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 28px;
  border: 1px solid var(--nb-accent);
  border-radius: 4px;
  text-decoration: none !important;
  transition: all 0.2s ease;
}
.nb-btn-ghost:hover { background: var(--nb-accent); color: #fff !important; }

/* ---------- 4. 数据带（以数据说话） ---------- */
.nb-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}
.nb-stat {
  padding: 34px 24px;
  text-align: center;
  border-right: 1px solid var(--nb-line);
}
.nb-stat:last-child { border-right: none; }
.nb-stat b {
  display: block;
  font-size: 34px;
  font-weight: 700;
  color: var(--nb-accent);
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.nb-stat span {
  font-size: 13.5px;
  color: var(--nb-ink-soft);
  line-height: 1.4;
}

/* ---------- 5. 通用正文 ---------- */
.nb-prose {
  max-width: 760px;
  font-size: 16.5px;
  line-height: 1.8;
  color: #374151;
}
.nb-prose p { margin: 0 0 20px; }
.nb-prose h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 40px 0 14px;
}
.nb-chipline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.nb-chipline li {
  font-size: 14px;
  color: var(--nb-ink);
  background: #fff;
  border: 1px solid var(--nb-line);
  border-radius: 3px;
  padding: 8px 16px;
}

/* ---------- 6. 产品卡片网格 ---------- */
.nb-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.nb-card {
  background: #fff;
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
  text-decoration: none !important;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  display: block;
}
.nb-card:hover {
  box-shadow: 0 12px 32px rgba(31, 41, 55, 0.10);
  transform: translateY(-3px);
}
.nb-card-img {
  aspect-ratio: 1 / 1;
  background: #fff;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nb-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.nb-card-body {
  padding: 18px 20px 20px;
  border-top: 1px solid var(--nb-line);
}
.nb-card-cat {
  display: block;
  font-size: 12px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 6px;
}
.nb-card-title {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--nb-ink);
  line-height: 1.4;
  margin: 0;
}
.nb-card:hover .nb-card-title { color: var(--nb-accent); }

/* ---------- 7. FAQ 手风琴 ---------- */
.nb-faq { max-width: 820px; }
.nb-faq details {
  border-bottom: 1px solid var(--nb-line);
}
.nb-faq details:first-child { border-top: 1px solid var(--nb-line); }
.nb-faq summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 44px 22px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--nb-ink);
  position: relative;
}
.nb-faq summary::-webkit-details-marker { display: none; }
.nb-faq summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--nb-accent);
}
.nb-faq details[open] summary::after { content: "−"; }
.nb-faq details[open] summary { color: var(--nb-accent); }
.nb-faq .nb-faq-a {
  padding: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.75;
  color: #4b5563;
  max-width: 700px;
}

/* ---------- 8. 证书网格 ---------- */
.nb-certs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.nb-cert {
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  text-decoration: none !important;
  display: block;
}
.nb-cert img {
  width: 100%;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #fff;
  padding: 14px;
  box-sizing: border-box;
}
.nb-cert figcaption,
.nb-cert-cap {
  display: block;
  padding: 14px 18px;
  border-top: 1px solid var(--nb-line);
  font-size: 14px;
  font-weight: 600;
  color: var(--nb-ink);
  text-align: center;
  letter-spacing: 0.4px;
}

/* ---------- 9. 联系页 ---------- */
.nb-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.nb-contact-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--nb-line);
}
.nb-contact-item:last-child { border-bottom: none; }
.nb-contact-label {
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 6px;
}
.nb-contact-value {
  font-size: 17px;
  font-weight: 600;
  color: var(--nb-ink);
  line-height: 1.5;
}
.nb-contact-value a { color: var(--nb-ink); text-decoration: none; }
.nb-contact-value a:hover { color: var(--nb-accent); }
.nb-form { display: grid; gap: 16px; }
.nb-form input,
.nb-form textarea {
  width: 100%;
  box-sizing: border-box;
  font-size: 15px;
  font-family: inherit;
  color: var(--nb-ink);
  padding: 13px 16px;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
}
.nb-form input:focus,
.nb-form textarea:focus { border-color: var(--nb-accent); }
.nb-form textarea { min-height: 140px; resize: vertical; }
.nb-form .nb-form-hint {
  font-size: 13px;
  color: #9ca3af;
  margin: -6px 0 0;
}

/* ---------- 10. 产品详情 ---------- */
.nb-pd {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  padding: 64px 0 72px;
  align-items: start;
}
.nb-pd-main {
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
}
.nb-pd-main img {
  width: 100%;
  display: block;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}
.nb-pd-thumbs {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 12px;
}
.nb-pd-thumbs img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 2px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  display: block;
  background: #fff;
  transition: border-color 0.15s;
}
.nb-pd-thumbs img:hover,
.nb-pd-thumbs img.nb-on { border-color: var(--nb-accent); }
.nb-pd-info h2 {
  font-size: 27px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--nb-ink);
  letter-spacing: -0.3px;
}
.nb-pd-cat {
  font-size: 13px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 22px;
}
.nb-pd-desc {
  font-size: 16px;
  line-height: 1.8;
  color: #374151;
  margin: 0 0 28px;
}
.nb-pd-points {
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
}
.nb-pd-points li {
  position: relative;
  padding: 7px 0 7px 24px;
  font-size: 15px;
  color: #374151;
  line-height: 1.55;
}
.nb-pd-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 15px;
  width: 8px;
  height: 2px;
  background: var(--nb-accent);
}
.nb-pd-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.nb-pd-note {
  margin: 14px 0 0;
  font-size: 13.5px;
  color: #9ca3af;
}

/* 详情富文本区（技术参数等） */
.nb-rich {
  font-size: 15.5px;
  line-height: 1.8;
  color: #374151;
  max-width: 900px;
}
.nb-rich h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 44px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--nb-accent);
  display: inline-block;
}
.nb-rich h2:first-child { margin-top: 0; }
.nb-rich ul { margin: 0 0 22px; padding-left: 22px; }
.nb-rich li { margin: 7px 0; }
.nb-rich p { margin: 0 0 18px; }
.nb-rich img { max-width: 100%; height: auto; }
.nb-rich span[style*="font-size"] { font-size: inherit !important; }
.nb-rich strong { color: var(--nb-ink); }
.nb-rich iframe {
  max-width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  width: 100%;
  border: 0;
  display: block;
  margin: 0 0 26px;
}

/* 产品详情页结构化内容 */
.nb-pd-video {
  max-width: 900px;
  margin-bottom: 48px;
}
.nb-pd-video iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  border: 0;
  border-radius: 6px;
  display: block;
}
.nb-pd-details {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}
.nb-pd-details h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 0 0 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--nb-accent);
  display: inline-block;
}
.nb-specs {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
}
.nb-specs th,
.nb-specs td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--nb-line);
  vertical-align: top;
}
.nb-specs th {
  width: 38%;
  background: var(--nb-bg-soft);
  color: var(--nb-ink);
  font-weight: 600;
}
.nb-specs td { color: #374151; }
.nb-specs tr:last-child th,
.nb-specs tr:last-child td { border-bottom: none; }
.nb-pd-list {
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
}
.nb-pd-list:last-child { margin-bottom: 0; }
.nb-pd-list li {
  position: relative;
  padding: 6px 0 6px 22px;
  font-size: 15px;
  color: #374151;
  line-height: 1.6;
}
.nb-pd-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 2px;
  background: var(--nb-accent);
}

/* ---------- 11. 博客列表 / 文章 ---------- */
.nb-posts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.nb-post {
  background: #fff;
  border: 1px solid var(--nb-line);
  border-radius: 6px;
  overflow: hidden;
  text-decoration: none !important;
  display: block;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.nb-post:hover {
  box-shadow: 0 12px 32px rgba(31, 41, 55, 0.10);
  transform: translateY(-3px);
}
.nb-post-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--nb-bg-soft);
}
.nb-post-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.nb-post-body { padding: 20px 22px 24px; }
.nb-post-date {
  font-size: 12.5px;
  color: #9ca3af;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: 8px;
}
.nb-post-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--nb-ink);
  margin: 0 0 10px;
}
.nb-post:hover .nb-post-title { color: var(--nb-accent); }
.nb-post-excerpt {
  font-size: 14px;
  line-height: 1.65;
  color: var(--nb-ink-soft);
  margin: 0;
}

.nb-article {
  max-width: 760px;
  font-size: 16.5px;
  line-height: 1.85;
  color: #374151;
}
.nb-article h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 40px 0 14px;
}
.nb-article h3 {
  font-size: 18.5px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 32px 0 12px;
}
.nb-article p { margin: 0 0 20px; }
.nb-article ul { margin: 0 0 22px; padding-left: 22px; }
.nb-article li { margin: 7px 0; }
.nb-article img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 26px auto;
  border-radius: 4px;
}
.nb-article iframe {
  max-width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  width: 100%;
  border: 0;
}
.nb-meta {
  font-size: 13.5px;
  color: #9ca3af;
  letter-spacing: 0.4px;
  margin: 0;
}

/* ---------- 12. 简单页面（search / 404） ---------- */
.nb-plain {
  text-align: center;
  padding: 110px 24px;
}
.nb-plain h1 {
  font-size: 42px;
  font-weight: 700;
  color: var(--nb-ink);
  margin: 0 0 14px;
}
.nb-plain p { font-size: 17px; color: var(--nb-ink-soft); margin: 0 0 30px; }

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1100px) {
  .nb-cards, .nb-posts, .nb-certs { grid-template-columns: repeat(2, 1fr); }
  .nb-pd { gap: 40px; }
}
@media (max-width: 900px) {
  .nb-contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .nb-hero { padding: 44px 0 40px; }
  .nb-hero h1 { font-size: 30px; }
  .nb-section { padding: 56px 0; }
}
@media (max-width: 767px) {
  .nb-pd { grid-template-columns: 1fr; gap: 32px; padding: 44px 0 52px; }
  .nb-pd-thumbs { grid-template-columns: repeat(5, 1fr); }
  .nb-pd-details { grid-template-columns: 1fr; gap: 42px; }
  .nb-specs th { width: 42%; }
  .nb-stats { grid-template-columns: repeat(2, 1fr); }
  .nb-stat { border-bottom: 1px solid var(--nb-line); }
  .nb-stat:nth-child(3) { border-right: none; }
  .nb-stat:nth-child(n+3) { border-bottom: none; }
  .nb-cards, .nb-posts, .nb-certs { grid-template-columns: 1fr 1fr; gap: 14px; }
  .nb-card-body { padding: 12px 14px 14px; }
  .nb-card-title { font-size: 14px; }
  .nb-post-body { padding: 14px 16px 16px; }
  .nb-post-title { font-size: 15px; }
  .nb-hero h1 { font-size: 26px; }
  .nb-hero .nb-sub { font-size: 15.5px; }
  .nb-h2 { font-size: 23px; }
  .nb-section { padding: 46px 0; }
  .nb-article { font-size: 16px; }
}
@media (max-width: 480px) {
  .nb-cards, .nb-posts { grid-template-columns: 1fr; }
  .nb-stat b { font-size: 26px; }
  .nb-stat { padding: 24px 14px; }
}