/* qingfeng — B2B breeze matrix · mint/teal spine layout */
:root {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --ink: #1a2b32;
  --muted: #5c7279;
  --line: rgba(26, 43, 50, 0.1);
  --mint: #3db8a9;
  --teal: #1f8f85;
  --teal-soft: rgba(61, 184, 169, 0.12);
  --accent: #1f8f85;
  --a2: #3db8a9;
  --spine-w: 220px;
  --display: "Syne", "Noto Sans SC", sans-serif;
  --body: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --sans: "IBM Plex Sans", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.tpl-qingfeng {
  margin: 0;
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--mint); }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.15; margin: 0 0 0.5em; }

.qf-shell {
  display: grid;
  grid-template-columns: var(--spine-w) minmax(0, 1fr);
  min-height: 100vh;
  max-width: 1360px;
  margin: 0 auto;
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--line);
}

/* —— sticky brand spine —— */
.qf-spine {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.5rem;
  border-right: 1px solid var(--line);
  background: var(--surface);
  z-index: 20;
}
.qf-spine-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--ink);
  margin-bottom: 3rem;
}
.qf-spine-name {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  max-height: 40vh;
  overflow: hidden;
}
.qf-spine-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}
.qf-spine-nav a {
  padding: 0.55rem 0;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.25s, border-color 0.25s;
}
.qf-spine-nav a:hover {
  color: var(--teal);
  border-bottom-color: var(--mint);
}
.qf-spine-tip {
  font-size: 0.75rem;
  color: var(--muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  align-self: center;
  opacity: 0.7;
  margin: 0;
}

/* —— content stream —— */
.qf-stream {
  padding: 0 clamp(1.5rem, 4vw, 4rem) 4rem;
  max-width: none;
  min-width: 0;
}
.qf-rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0 0 2.5rem;
}
.qf-rule-anim {
  width: 0;
  animation: qf-rule-grow 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.4s forwards;
}
@keyframes qf-rule-grow { to { width: 120px; } }

.qf-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 4rem 0 5rem;
  min-height: 70vh;
}
.qf-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mint);
  margin: 0 0 1rem;
}
.qf-hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 0.75rem;
}
.qf-tagline {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
  max-width: 36ch;
}
.qf-cta {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background: var(--teal);
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  transition: background 0.25s, transform 0.25s;
}
.qf-cta:hover {
  background: var(--mint);
  color: #fff;
  transform: translateY(-2px);
}
.qf-banner {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
}
.qf-banner img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  animation: qf-float 8s ease-in-out infinite alternate;
}
@keyframes qf-float {
  from { transform: scale(1) translateY(0); }
  to { transform: scale(1.03) translateY(-6px); }
}

.qf-block { padding: 3rem 0; }
.qf-sec-head { margin-bottom: 2rem; }
.qf-sec-head p { color: var(--muted); margin: 0.5rem 0 0; max-width: 52ch; }
.qf-about-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.qf-about-grid p { margin: 0; color: var(--muted); }
.qf-media :is(img, video) { max-width: 100%; border: 1px solid var(--line); }

.qf-matrix,
.qf-products,
.qf-cases,
.qf-articles {
  display: block;
  }

/* injected grids */
.content-card, .news-card {
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  color: inherit;
  transition: border-color 0.3s, transform 0.3s;
}
.content-card:hover { border-color: var(--mint); transform: translateY(-3px); }
.card-media img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.card-body { padding: 1rem 1.1rem; }
.card-body h3 { font-size: 0.95rem; margin: 0 0 0.35rem; }
.card-body p { margin: 0; font-size: 0.82rem; color: var(--muted); }
.feature-item {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--mint);
}
.feature-item h3 { font-size: 0.95rem; }
.feature-item p { margin: 0; font-size: 0.82rem; color: var(--muted); }

/* 商务对接卡 */
.qf-biz-card { padding: 2rem 0 3rem; }
.qf-biz-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 2.5rem;
  background: var(--teal-soft);
  border: 1px solid rgba(61, 184, 169, 0.25);
}
.qf-biz-copy h2 { font-size: 1.5rem; }
.qf-biz-copy p { margin: 0; color: var(--muted); max-width: 40ch; }
.qf-biz-action {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  text-align: right;
}
.qf-biz-label { font-size: 0.72rem; letter-spacing: 0.12em; color: var(--muted); }
.qf-biz-phone {
  font-family: var(--display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal);
  animation: qf-pulse 3s ease-in-out infinite;
}
@keyframes qf-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.75; }
}
.qf-biz-person { font-size: 0.85rem; color: var(--muted); }

.qf-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
.qf-contact-grid p { color: var(--muted); margin: 0 0 1rem; }
.qf-contact-phone {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 600;
}
.qf-dl { margin: 0; display: grid; gap: 0.75rem; }
.qf-dl div { display: grid; grid-template-columns: 4em 1fr; gap: 0.5rem; }
.qf-dl dt { font-size: 0.78rem; color: var(--muted); letter-spacing: 0.06em; }
.qf-dl dd { margin: 0; }

.site-footer {
  padding: 1.5rem clamp(1.5rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
  background: var(--surface);
  margin-left: var(--spine-w);
  text-align: center;
}
.qf-year { margin: 0 0 0.5rem; font-size: 0.82rem; color: var(--muted); text-align: center; }

/* motion */
.fx-rise, .content-card, .news-card, .feature-item, .fx-block {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.fx-ready .fx-rise.is-in,
.fx-ready .content-card.is-in,
.fx-ready .news-card.is-in,
.fx-ready .feature-item.is-in,
.fx-ready .fx-block.is-in {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .qf-shell { grid-template-columns: 1fr; }
  .qf-spine {
    position: relative;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 1rem 1.25rem;
    gap: 1rem;
  }
  .qf-spine-name { writing-mode: horizontal-tb; max-height: none; }
  .qf-spine-nav { flex-direction: row; flex-wrap: wrap; flex: none; gap: 0.5rem 1rem; }
  .qf-spine-tip { display: none; }
  .site-footer { margin-left: 0; }
  .qf-hero { grid-template-columns: 1fr; padding-top: 2rem; }
  .qf-about-grid { grid-template-columns: 1fr; }
  .qf-biz-inner { grid-template-columns: 1fr; }
  .qf-biz-action { align-items: flex-start; text-align: left; }
  .qf-contact-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .fx-rise, .content-card, .news-card, .feature-item, .fx-block { opacity: 1; transform: none; }
}

/* === enterprise card grids (injected) === */
.card-grid,
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 22px);
  width: 100%;
}
.card-grid-case {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.content-card,
.news-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--surface, #fff);
  border: 1px solid var(--line, rgba(15, 23, 42, 0.08));
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.content-card:hover,
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}
.card-media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.04);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card-body {
  padding: 1rem 1.1rem 1.15rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.card-body h3 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.35;
}
.card-body p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted, #667085);
  line-height: 1.55;
}
.card-link {
  margin-top: auto;
  padding-top: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.5vw, 18px);
  margin-bottom: 1.25rem;
}
@media (max-width: 960px) {
  .card-grid,
  .news-grid,
  .card-grid-case,
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 640px) {
  .card-grid,
  .news-grid,
  .card-grid-case,
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.card-index{display:inline-block;font-size:.72rem;letter-spacing:.12em;color:var(--muted,#667085);opacity:.75;margin-bottom:.15rem}

/* === enterprise polish v2 === */
img { max-width: 100%; height: auto; }
.card-media img,
.about-media img,
.case-cover img,
.article-cover img,
.nb-cover-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.content-card,
.news-card {
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.content-card:hover,
.news-card:hover {
  transform: translateY(-3px);
}
.card-body h3 {
  letter-spacing: 0.01em;
}
.card-body p {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.feature-item h3 { letter-spacing: 0.01em; }
.site-footer {
  letter-spacing: 0.01em;
}
@media (max-width: 1100px) {
  .card-grid,
  .news-grid,
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }
}
@media (max-width: 720px) {
  .card-grid,
  .news-grid,
  .feature-grid,
  .card-grid-case {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }
  .card-body { padding: 14px 15px 16px; }
  .card-body h3 { font-size: 1rem; }
  .card-body p { font-size: 0.84rem; }
}
@media (max-width: 480px) {
  .card-media { aspect-ratio: 16 / 10; }
  .site-footer { padding-left: 16px; padding-right: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .content-card:hover,
  .news-card:hover { transform: none; }
}

/* === layout fix: wrappers must not nest outer grids === */
.qf-products,.qf-cases,.qf-articles,.qf-matrix,.mj-products,.mj-cases,.mj-articles { display: block !important; }



/* === 品牌 Logo 标准尺寸锁定：会员上传原图也不会撑开头部布局 === */
.brand-logo, .brand-mark { width: 36px; height: 36px; object-fit: contain; border-radius: 8px; flex-shrink: 0; }