/* 官网视觉升级：轮播以下区块、内页、与帮助/收费页共用语言 */
/* 不改功能，仅覆盖观感 */

.section {
  padding: 88px 0;
  position: relative;
}
.section-alt {
  background:
    linear-gradient(180deg, #f3f6fb 0%, #f7f9fc 100%);
}
.section-head {
  text-align: center;
  margin-bottom: 52px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--c-ink);
  letter-spacing: .02em;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.section-head h2 .en-title {
  order: -1;
  display: block;
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-primary-2);
}
.section-head h2::after {
  content: "";
  width: 36px;
  height: 2px;
  background: var(--c-primary);
  margin-top: 6px;
}
.section-head p {
  font-size: 15px;
  color: var(--c-ink-2);
  margin: 0;
  line-height: 1.8;
}

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1.35fr .9fr;
  gap: 56px;
  align-items: start;
}
.about-text p,
#aboutContent p,
#aboutBody p {
  font-size: 15.5px;
  color: var(--c-ink-2);
  margin: 0 0 16px;
  line-height: 1.95;
}
.about-text p:first-child {
  font-size: 16.5px;
  color: var(--c-ink);
  font-weight: 500;
}
.about-links { display: flex; gap: 28px; margin-top: 28px; flex-wrap: wrap; }
.text-link {
  color: var(--c-primary);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .04em;
  position: relative;
}
.text-link:hover { color: var(--c-primary-2); }
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.ac-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 20px 24px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.ac-item::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-primary);
}
.ac-item strong {
  display: block;
  font-size: 28px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: -.02em;
  line-height: 1.15;
}
.ac-item span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-ink-2);
  letter-spacing: .04em;
}

/* ---- Product tabs / cards ---- */
.cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  justify-content: center;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--c-line);
}
.cat-tab {
  padding: 12px 22px;
  border-radius: 0;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--c-ink-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: -1px;
  transition: color .2s, border-color .2s;
}
.cat-tab:hover { color: var(--c-primary); background: transparent; border-color: transparent; }
.cat-tab.active {
  background: transparent;
  color: var(--c-primary);
  border-bottom-color: var(--c-primary);
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.showcase-grid.product-panel { display: none; }
.showcase-grid.product-panel.active { display: grid; }
.showcase-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  display: block;
}
.showcase-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #c5d2e6;
}
.sc-img-wrap {
  aspect-ratio: 4/3;
  background: var(--c-bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.sc-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.showcase-card:hover .sc-img-wrap img { transform: scale(1.05); }
.sc-placeholder span { font-size: 20px; font-weight: 600; color: var(--c-primary); opacity: .28; }
.showcase-card h4 {
  margin: 16px 18px 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
}
.showcase-card p {
  margin: 0 18px 20px;
  font-size: 13px;
  color: var(--c-ink-2);
  line-height: 1.6;
}
.section-more { text-align: center; margin-top: 40px; }

/* ---- Applications ---- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.app-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 24px 26px;
  text-align: left;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.app-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #c5d2e6;
}
.app-icon-wrap {
  width: 48px; height: 48px; border-radius: 4px; margin: 0 0 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; color: #fff;
  letter-spacing: .04em;
}
.app-icon-wrap.tone-a { background: var(--c-primary); }
.app-icon-wrap.tone-b { background: #1e4ea0; }
.app-icon-wrap.tone-c { background: #3a6bb5; }
.app-icon-wrap.tone-d { background: #091c42; }
.app-card h4 { margin: 0 0 10px; font-size: 17px; color: var(--c-ink); font-weight: 600; }
.app-card p { margin: 0; font-size: 13.5px; color: var(--c-ink-2); line-height: 1.75; }

/* ---- News ---- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  min-height: 210px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #c5d2e6;
}
.news-date {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-primary);
  background: #edf2fa;
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 14px;
}
.news-card h4 {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--c-ink);
  font-weight: 600;
}
.news-card p {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--c-ink-2);
  line-height: 1.7;
  flex: 1;
}
.news-card::after {
  content: "了解更多 →";
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: .04em;
}

/* ---- Selection band ---- */
.selection-banner {
  background: linear-gradient(120deg, #091c42 0%, #123a7a 55%, #1e4ea0 100%);
  padding: 72px 0;
}
.selection-panel {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
}
.sel-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #9ec0ff;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  padding: 5px 10px;
  border-radius: 2px;
  margin-bottom: 16px;
}
.selection-panel h2 { margin: 0 0 16px; font-size: 30px; color: #fff; font-weight: 600; }
.selection-panel p {
  margin: 0 0 26px;
  color: rgba(255,255,255,.78);
  font-size: 15px;
  line-height: 1.85;
  max-width: 560px;
}
.sel-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.selection-banner .btn-primary {
  background: #fff;
  color: var(--c-primary-dark);
}
.selection-banner .btn-primary:hover { background: #e8eef8; }
.selection-banner .btn-outline-dark {
  border-color: rgba(255,255,255,.45);
  color: #fff;
}
.selection-banner .btn-outline-dark:hover { background: rgba(255,255,255,.1); }
.selection-banner .btn-ghost-dark {
  color: rgba(255,255,255,.82);
  border-color: rgba(255,255,255,.22);
}
.selection-banner .btn-ghost-dark:hover {
  color: #fff;
  border-color: rgba(255,255,255,.5);
}
.sel-preview { display: flex; justify-content: center; }
.mock-compact { max-width: 360px; box-shadow: 0 24px 50px rgba(0,0,0,.28); }

/* ---- Download ---- */
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.download-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 36px 28px 28px;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
  transition: transform .2s, box-shadow .2s;
}
.download-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.dl-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  font-size: 22px;
  background: var(--c-bg-muted);
  border-radius: 4px;
}
.download-card:nth-child(1) .dl-icon::before,
.download-card:nth-child(2) .dl-icon::before,
.download-card:nth-child(3) .dl-icon::before { content: none; }
.download-card h3 { margin: 0 0 8px; font-size: 20px; color: var(--c-ink); font-weight: 600; }
.dl-meta {
  color: var(--c-primary);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.dl-desc { color: var(--c-ink-2); font-size: 14px; margin: 0 0 24px; min-height: 64px; line-height: 1.75; }
.download-card .btn { margin-bottom: 12px; width: 100%; }
.dl-version { font-size: 12px; color: var(--c-ink-2); }

/* ---- Certs ---- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cert-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--radius);
  padding: 18px 18px;
  font-size: 14px;
  font-weight: 550;
  color: var(--c-ink);
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  transition: transform .2s, box-shadow .2s;
}
.cert-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.cert-icon { width: 36px; height: 36px; object-fit: contain; flex-shrink: 0; }

/* ---- Contact ---- */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.contact-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: left;
  box-shadow: var(--shadow-sm);
}
.contact-icon {
  width: 40px; height: 40px;
  margin-bottom: 16px;
  font-size: 20px;
  background: var(--c-bg-muted);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card h4 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-ink-2);
}
.contact-card p {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  word-break: break-all;
  color: var(--c-ink);
  line-height: 1.55;
}
.contact-card .contact-sub { font-size: 13px; font-weight: 500; color: var(--c-ink-2); margin-top: 6px; }

/* ---- Footer ---- */
.footer {
  background: #091c42;
  color: #b7c4dc;
  padding: 48px 0 28px;
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.fb-name { color: #fff; font-weight: 700; font-size: 16px; }
.fb-en { font-size: 12px; color: #8ea0c2; letter-spacing: .02em; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: #c3d0e8; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-copy {
  font-size: 12px;
  color: #7e93bd;
  width: 100%;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 20px;
  margin-top: 10px;
  letter-spacing: .02em;
}

/* ---- Inner pages ---- */
.page-hero {
  position: relative;
  min-height: 200px;
  display: flex;
  align-items: flex-end;
  color: #fff;
  padding: 64px 0 36px;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(9,28,66,.2), rgba(9,28,66,.05)),
    linear-gradient(160deg, #091c42 0%, #0f2c66 48%, #1e4ea0 100%);
}
.page-hero.has-banner .page-hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: brightness(.38);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero-kicker {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: #9ec0ff;
  margin-bottom: 10px;
}
.page-hero h1 {
  margin: 0 0 10px;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: .01em;
}
.page-hero p {
  margin: 0;
  color: rgba(255,255,255,.82);
  max-width: 680px;
  font-size: 15px;
  line-height: 1.7;
}
.page-hero-article { min-height: 210px; }
.page-hero-article h1 { font-size: 30px; max-width: 880px; }

.page-breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--c-line);
  padding: 12px 0;
}
.page-breadcrumb { font-size: 13px; color: var(--c-ink-2); }
.page-breadcrumb .current { color: var(--c-ink); font-weight: 600; }

.page-main {
  padding: 48px 0 80px;
  min-height: 44vh;
  background: var(--c-bg-alt);
}
.page-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}
.sidebar-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.sidebar-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-line);
  background: #f8fafd;
}
.sidebar-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-primary);
}
.sidebar-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 0;
  color: var(--c-ink-2);
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar-link:hover {
  color: var(--c-primary);
  background: #f5f8fc;
  border-left-color: #c5d2e6;
}
.sidebar-link.is-active {
  color: var(--c-primary);
  font-weight: 700;
  background: #edf2fa;
  border-left-color: var(--c-primary);
}
.page-body {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 40px 44px;
  font-size: 16px;
  line-height: 1.9;
  box-shadow: var(--shadow-sm);
  color: #2c3544;
}
.page-body h2, .page-body h3 { color: var(--c-primary-dark); font-weight: 600; }
.page-body h3 { margin: 28px 0 12px; }
.page-body p { margin: 0 0 14px; }
.media-row-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.media-row-body h4 { margin: 0 0 10px; font-size: 18px; color: var(--c-ink); }
.media-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.media-card h4 { margin: 16px 18px 6px; font-size: 16px; color: var(--c-ink); }
.empty-hint {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--c-ink-2);
  padding: 36px;
  background: #fff;
  border: 1px dashed var(--c-line);
  border-radius: var(--radius);
}
.page-hero-article .news-date {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
}
.page-news-grid { margin-top: 8px; grid-template-columns: repeat(2, 1fr); }

@media (max-width: 1000px) {
  .showcase-grid { grid-template-columns: repeat(3, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .about-grid, .selection-panel { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid, .download-grid, .contact-grid { grid-template-columns: 1fr 1fr; }
  .page-layout { grid-template-columns: 1fr; }
  .selection-banner { padding: 56px 0; }
}
@media (max-width: 620px) {
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .showcase-grid, .news-grid, .app-grid { grid-template-columns: 1fr; }
  .cert-grid, .download-grid, .contact-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 26px; }
  .page-body { padding: 24px 20px; }
  .cat-tabs { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
}