:root {
  --tdt-navy: #0b1f3a;
  --tdt-navy-2: #122a4d;
  --tdt-ink: #152033;
  --tdt-muted: #5b6b80;
  --tdt-line: #dbe3ee;
  --tdt-paper: #f4f7fb;
  --tdt-white: #ffffff;
  --tdt-accent: #e85d04;
  --tdt-accent-2: #ff7a1a;
  --tdt-max: 1200px;
  --tdt-gutter: 24px;
  --tdt-font: "Segoe UI", "PingFang SC", "Microsoft YaHei", Inter, system-ui, sans-serif;
  --tdt-fs: 15px;
  --tdt-fs-sm: 13px;
  --tdt-fs-xs: 12px;
  --tdt-fs-h1: 22px;
  --tdt-fs-h2: 18px;
  --tdt-lh: 1.65;
}

html, body {
  text-transform: none !important;
}
body {
  margin: 0;
  color: var(--tdt-ink);
  background: var(--tdt-white);
  font-family: var(--tdt-font);
  font-size: var(--tdt-fs);
  line-height: var(--tdt-lh);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.tdt-wrap {
  width: 100%;
  max-width: var(--tdt-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--tdt-gutter);
  padding-right: var(--tdt-gutter);
  box-sizing: border-box;
}

/* 内页沿用 .app-container，统一到同一栏宽 */
body .app-container {
  width: 100% !important;
  max-width: var(--tdt-max) !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: var(--tdt-gutter) !important;
  padding-right: var(--tdt-gutter) !important;
  box-sizing: border-box;
}

/* 内页一级标题 */
#product-content > .app-container > .title,
#newsList ._title,
#Aboutus ._title,
#faq-page .fq-head h1 {
  font-size: var(--tdt-fs-h1);
  font-weight: 700;
  line-height: 1.3;
  color: var(--tdt-ink);
  letter-spacing: 0.02em;
}

.tdt-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 31, 58, .96);
  color: #fff;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.tdt-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 76px;
}
.tdt-logo { display: flex; align-items: center; color: #fff; flex-shrink: 0; }
.tdt-logo img { height: 52px; width: auto; background: #fff; border-radius: 6px; padding: 6px 12px; }
.tdt-nav { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; flex: 1; }
.tdt-nav a {
  color: rgba(255,255,255,.82);
  padding: 8px 10px;
  font-size: var(--tdt-fs-sm);
  font-weight: 600;
  line-height: 1.3;
  border-radius: 6px;
  white-space: nowrap;
}
.tdt-nav a:hover { color: #fff; background: rgba(255,255,255,.08); }
.tdt-nav__tools { display: none; }
.tdt-header__tools { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.tdt-cta {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--tdt-accent); color: #fff !important;
  padding: 9px 14px; border-radius: 6px; font-weight: 700; font-size: var(--tdt-fs-sm);
  white-space: nowrap;
  border: 0; cursor: pointer; font-family: inherit;
}
.tdt-cta:hover { background: var(--tdt-accent-2); }
.tdt-cta--desk {
  background: transparent;
  border: 1px solid rgba(255,255,255,.38);
}
.tdt-cta--desk:hover { background: rgba(255,255,255,.12); }
.tdt-search { display: flex; background: rgba(255,255,255,.1); border-radius: 6px; overflow: hidden; }
.tdt-search input {
  border: 0; background: transparent; color: #fff; padding: 8px 10px; width: 128px; outline: none;
  font-size: var(--tdt-fs-sm); font-family: inherit;
}
.tdt-search input::placeholder { color: rgba(255,255,255,.55); }
.tdt-search button { border: 0; background: transparent; color: #fff; padding: 0 10px; cursor: pointer; font-size: 16px; }

.tdt-header .lang-switch { margin-left: 0; }
.tdt-header .lang-switch__btn {
  background: rgba(255,255,255,.1) !important;
  border-color: rgba(255,255,255,.22) !important;
  color: #fff !important;
  min-height: 34px;
}
.tdt-header .lang-switch__btn:hover,
.tdt-header .lang-switch.is-open .lang-switch__btn {
  background: rgba(255,255,255,.16) !important;
}

.tdt-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px 9px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 8px;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}
.tdt-nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 1px;
}
.tdt-nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(11, 31, 58, .45);
}
.tdt-nav-backdrop.is-visible,
body.nav-open .tdt-nav-backdrop { display: block; }

.tdt-hero { position: relative; background: var(--tdt-navy); color: #fff; min-height: 420px; overflow: hidden; }
.tdt-hero img { width: 100%; height: 520px; object-fit: cover; opacity: .72; }
.tdt-hero__copy {
  position: absolute; inset: 0; display: flex; align-items: center;
  background: linear-gradient(90deg, rgba(11,31,58,.82) 0%, rgba(11,31,58,.2) 70%);
}
.tdt-hero__copy h1 { margin: 0 0 12px; font-size: clamp(32px, 5vw, 56px); line-height: 1.15; max-width: 720px; }
.tdt-hero__copy p { max-width: 560px; color: rgba(255,255,255,.84); margin: 0 0 22px; font-size: 18px; }

.tdt-section { padding: 72px 0; }
.tdt-section--paper { background: var(--tdt-paper); }
.tdt-kicker { color: var(--tdt-accent); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: var(--tdt-fs-xs); margin: 0 0 8px; }
.tdt-h2 { margin: 0 0 12px; font-size: 32px; line-height: 1.2; }
.tdt-lead { color: var(--tdt-muted); max-width: 640px; margin: 0 0 32px; }

.tdt-cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tdt-cat {
  background: #fff; border: 1px solid var(--tdt-line); padding: 22px;
  min-height: 140px; display: flex; flex-direction: column; justify-content: space-between;
  transition: transform .2s ease, box-shadow .2s ease;
}
.tdt-cat:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(11,31,58,.08); }
.tdt-cat h3 { margin: 0 0 8px; font-size: var(--tdt-fs-h2); }
.tdt-cat span { color: var(--tdt-accent); font-size: var(--tdt-fs-sm); font-weight: 700; }

.tdt-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.tdt-card { background: #fff; border: 1px solid var(--tdt-line); overflow: hidden; }
.tdt-card img { width: 100%; height: 220px; object-fit: contain; background: #f8fafc; }
.tdt-card__body { padding: 16px; }
.tdt-card__body h3 { margin: 0 0 8px; font-size: 16px; }
.tdt-card__body p { margin: 0; color: var(--tdt-muted); font-size: var(--tdt-fs-sm); }

.tdt-split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.tdt-news { display: grid; grid-template-columns: 1.3fr .7fr; gap: 24px; }
.tdt-news__main img { width: 100%; height: 280px; object-fit: cover; }
.tdt-news__item { padding: 16px 0; border-bottom: 1px solid var(--tdt-line); }
.tdt-news__item small { color: var(--tdt-muted); }

.tdt-footer { background: var(--tdt-navy); color: rgba(255,255,255,.82); padding: 48px 0 0; font-size: 14px; }
.tdt-footer a { color: rgba(255,255,255,.82); }
.tdt-footer a:hover { color: #fff; }
.tdt-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.tdt-footer h4 { color: #fff; margin: 0 0 14px; font-size: var(--tdt-fs); font-weight: 700; }
.tdt-footer p, .tdt-footer li { font-size: 14px; line-height: 1.7; }
.tdt-footer ul { list-style: none; margin: 0; padding: 0; }
.tdt-footer li { margin: 0 0 8px; }
.tdt-legal {
  margin-top: 32px; padding: 16px 0;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: var(--tdt-fs-xs); color: rgba(255,255,255,.6);
}

/* Breadcrumb */
.tdt-crumb {
  background: #fff;
  border-bottom: 1px solid var(--tdt-line);
  color: var(--tdt-muted);
  font-size: var(--tdt-fs-sm);
  margin: 0;
}
.tdt-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  min-height: 44px;
  padding-top: 10px !important;
  padding-bottom: 10px !important;
  gap: 0;
}
.tdt-crumb__item {
  display: inline-flex;
  align-items: center;
  color: var(--tdt-muted);
  line-height: 1.4;
}
a.tdt-crumb__item:hover { color: var(--tdt-navy); }
.tdt-crumb__item.is-current {
  color: var(--tdt-ink);
  font-weight: 650;
}
.tdt-crumb__sep {
  margin: 0 8px;
  font-size: 12px;
  color: #c3cad6;
}

/* Pagination */
.tdt-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 28px 0 8px;
  font-size: var(--tdt-fs-sm);
}
.tdt-pager__btn,
.tdt-pager__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--tdt-line);
  border-radius: 8px;
  background: #fff;
  color: var(--tdt-ink);
  font-weight: 600;
  text-decoration: none;
}
.tdt-pager__num { min-width: 36px; padding: 0 8px; }
.tdt-pager__btn:hover,
.tdt-pager__num:hover {
  border-color: #4066b8;
  color: #4066b8;
}
.tdt-pager__num.is-current {
  background: #4066b8;
  border-color: #4066b8;
  color: #fff;
}
.tdt-pager__btn.is-disabled {
  color: #9aa3b2;
  background: #f5f7fb;
  cursor: default;
}
.tdt-pager__ellipsis { color: var(--tdt-muted); padding: 0 4px; }

.tdt-page { padding: 28px 0 64px; }

.app-index, .app-product, .page-box, .news-box { padding-top: 8px; }

#title-imageBox,
#title-imageBox.banner-stage {
  position: relative;
  overflow: hidden;
  background: var(--tdt-navy);
  margin: 0;
}
#title-imageBox img,
#title-imageBox .i-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center;
  display: block;
}
#title-imageBox img[src*="spacer"],
#title-imageBox .i-image[src*="spacer"] {
  display: none !important;
  height: 0 !important;
}

@media (max-width: 1080px) {
  .tdt-nav-toggle { display: inline-flex; }
  .tdt-header__tools .tdt-search,
  .tdt-header__tools .tdt-cta { display: none; }
  .tdt-nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 60;
    width: min(320px, 88vw);
    height: 100vh;
    margin: 0;
    padding: 84px 18px 28px;
    background: var(--tdt-navy);
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 4px;
    overflow: auto;
    box-shadow: -12px 0 32px rgba(0,0,0,.2);
  }
  .tdt-nav.is-open { display: flex; }
  .tdt-nav a {
    padding: 12px 12px;
    font-size: 15px;
  }
  .tdt-nav__tools {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.12);
  }
  .tdt-nav__tools .tdt-search {
    display: flex;
    width: 100%;
  }
  .tdt-nav__tools .tdt-search input { width: 100%; }
  .tdt-nav__tools .tdt-cta { width: 100%; min-height: 42px; }
  body.nav-open .tdt-nav-backdrop { display: block; }
}

@media (max-width: 980px) {
  :root { --tdt-gutter: 20px; }
  .tdt-cats, .tdt-grid, .tdt-split, .tdt-news, .tdt-footer__grid { grid-template-columns: 1fr 1fr; }
  .tdt-hero img { height: 360px; }
  .tdt-header__bar { min-height: 64px; }
  .tdt-logo img { height: 42px; }
  #title-imageBox img,
  #title-imageBox .i-image { height: 200px; }
  #product-content > .app-container > .title,
  #newsList ._title,
  #Aboutus ._title,
  #faq-page .fq-head h1 { font-size: 20px; }
}
@media (max-width: 640px) {
  :root { --tdt-gutter: 16px; --tdt-fs: 14px; }
  .tdt-cats, .tdt-grid, .tdt-split, .tdt-news, .tdt-footer__grid { grid-template-columns: 1fr; }
  .tdt-pager { gap: 6px; }
  .tdt-pager__btn { padding: 0 10px; }
}