/*
小马拉大车 样式设计备注：
1. 坚持“左侧品牌脊柱 + 右侧叙事画布”的新中式未来影像主义，不做常见紫色科技渐变。
2. 以墨蓝、暖杏、胶片红和钨丝金建立电影级层次，模块边缘采用切角、字幕条与细线导视。
3. 页面滚动和卡片悬停强调推镜、点亮、遮罩过渡与播放按钮出现，让视频属性在视觉上始终可见。
*/
:root {
  --bg: #081423;
  --bg-soft: #102038;
  --panel: rgba(12, 28, 46, 0.88);
  --panel-light: rgba(255, 248, 239, 0.08);
  --text: #f7f0e7;
  --muted: #d6c8b7;
  --gold: #d5b56a;
  --amber: #f1d5a1;
  --red: #ba4d4f;
  --line: rgba(213, 181, 106, 0.26);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  --radius-sm: 16px;
  --serif: "Noto Serif SC", serif;
  --sans: "Noto Sans SC", sans-serif;
  --condensed: "IBM Plex Sans Condensed", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(213,181,106,0.12), transparent 28%),
    radial-gradient(circle at top left, rgba(186,77,79,0.12), transparent 34%),
    linear-gradient(180deg, #081423 0%, #0b1528 35%, #09111e 100%);
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: 0.24;
  pointer-events: none;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.page-shell {
  width: min(1360px, calc(100% - 32px));
  margin: 0 auto;
  position: relative;
  padding-bottom: 48px;
}
.site-header {
  padding-top: 22px;
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(8,20,35,0.92), rgba(8,20,35,0.68));
}
.top-rail {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 28px 28px 12px 12px;
  padding: 18px 24px;
  background: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  box-shadow: var(--shadow);
}
.brand-lockup { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-icon {
  width: 44px; height: 44px; border-radius: 14px; object-fit: contain;
  background: rgba(255,248,239,0.08); padding: 4px; border: 1px solid rgba(255,255,255,0.08);
}
.brand-logo { width: 220px; height: auto; object-fit: contain; }
.brand-meta { min-width: 0; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  font-family: var(--condensed);
}
.meta-copy, .hero-desc, .section-heading p, .mini-card p, .service-card p, .video-card__body p, .contact-panel p, .mcp-panel p, .footer-brand p, .sub-hero__copy p {
  color: var(--muted);
  line-height: 1.82;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 4px 6px;
}
.nav-link {
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  font-size: 14px;
  transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}
.nav-link:hover, .nav-link.is-active {
  transform: translateY(-2px);
  border-color: rgba(213,181,106,0.48);
  background: rgba(213,181,106,0.12);
}
.search-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 12px 0 4px;
}
.search-form {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  padding: 10px 12px 10px 18px;
}
.search-label { font-size: 14px; color: var(--amber); white-space: nowrap; }
.search-input {
  width: 100%; border: none; outline: none; background: transparent; color: var(--text);
  font-size: 15px; min-width: 0;
}
.search-input::placeholder { color: rgba(247,240,231,0.56); }
.search-button, .primary-btn, .secondary-btn, .share-btn, .faq-question, .video-card__play {
  cursor: pointer;
}
.search-button, .primary-btn, .secondary-btn {
  border: none;
  border-radius: 999px;
  padding: 13px 18px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.search-button, .primary-btn {
  color: #09111e;
  background: linear-gradient(135deg, var(--amber), var(--gold));
  box-shadow: 0 16px 30px rgba(213,181,106,0.24);
}
.secondary-btn {
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
}
.search-button:hover, .primary-btn:hover, .secondary-btn:hover, .share-btn:hover {
  transform: translateY(-2px);
}
.search-hot {
  color: rgba(247,240,231,0.76);
  font-size: 13px;
  text-align: right;
}
.hero-section, .sub-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1.18fr);
  gap: 24px;
  align-items: stretch;
  padding: 28px 0 0;
}
.hero-copy, .sub-hero__copy {
  border: 1px solid var(--line);
  border-radius: 34px 18px 34px 18px;
  padding: 36px 30px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.hero-copy::before, .sub-hero__copy::before, .section-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(213,181,106,0.08), transparent 36%, rgba(186,77,79,0.05));
  pointer-events: none;
}
.hero-copy h1, .sub-hero__copy h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 4.2rem);
  line-height: 1.08;
}
.hero-copy h2 {
  margin: 18px 0 0;
  font-size: clamp(1.08rem, 2vw, 1.46rem);
  line-height: 1.65;
  font-weight: 600;
  color: #fbe9ca;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 26px 0;
}
.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.metric-strip div {
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
}
.metric-strip strong {
  display: block;
  font-size: 1.52rem;
  color: var(--amber);
  font-family: var(--condensed);
}
.metric-strip span { font-size: 13px; color: var(--muted); }
.hero-visual, .sub-hero__visual, .floating-image {
  min-height: 100%;
  border-radius: 20px 42px 20px 42px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  position: relative;
}
.hero-visual::after, .sub-hero__visual::after, .floating-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(8,20,35,0.4));
  pointer-events: none;
}
.hero-visual img, .sub-hero__visual img, .floating-image img, .contact-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.section-block {
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 30px 16px 30px 16px;
  padding: 32px;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.section-heading { max-width: 860px; margin-bottom: 24px; position: relative; z-index: 1; }
.section-heading h2 {
  margin: 0 0 14px;
  font-size: clamp(1.7rem, 2.6vw, 2.8rem);
  line-height: 1.18;
  font-family: var(--serif);
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  position: relative;
  z-index: 1;
}
.video-card {
  display: grid;
  gap: 0;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 24px 12px 24px 12px;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.video-card:hover { transform: translateY(-4px); border-color: rgba(213,181,106,0.42); }
.video-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.video-card__media img { width: 100%; height: 100%; object-fit: cover; }
.video-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(8,20,35,0.72));
}
.video-card__play {
  position: absolute;
  left: 50%; top: 50%; transform: translate(-50%, -50%) scale(0.86);
  width: 72px; height: 72px; border-radius: 50%; border: none;
  font-size: 1.45rem; color: #081423;
  background: linear-gradient(135deg, var(--amber), var(--gold));
  opacity: 0; transition: opacity 0.28s ease, transform 0.28s ease;
  z-index: 2;
}
.video-card:hover .video-card__play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.video-tag {
  position: absolute; left: 14px; bottom: 14px; z-index: 2;
  padding: 6px 10px; border-radius: 999px; font-size: 12px;
  background: rgba(8,20,35,0.72); border: 1px solid rgba(255,255,255,0.12);
}
.video-card__body { padding: 18px; }
.video-card__body h3, .service-card h3, .mini-card h3, .expert-card h3, .faq-question span, .contact-panel h3, .mcp-panel h3 {
  margin: 0 0 10px;
  line-height: 1.5;
}
.video-stats {
  display: flex; flex-wrap: wrap; gap: 12px; color: var(--amber); font-size: 13px; font-family: var(--condensed);
}
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 24px;
  align-items: center;
}
.split-layout.reverse {
  grid-template-columns: minmax(360px, 520px) minmax(0, 1fr);
}
.service-grid, .json-grid, .experts-grid, .logo-wall, .steps-grid, .testimonial-grid, .mini-grid {
  display: grid;
  gap: 16px;
  position: relative;
  z-index: 1;
}
.service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.json-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.experts-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-bottom: 22px; }
.steps-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.testimonial-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.mini-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.service-card, .ai-card, .expert-card, .step-card, .testimonial-card, .mini-card, .contact-panel, .mcp-panel, .logo-pill {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  border-radius: 22px 12px 22px 12px;
  padding: 18px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.ai-tags, .scope-tags, .tag-cloud {
  display: flex; flex-wrap: wrap; gap: 10px;
}
.ai-tags span, .scope-tags span, .tag-cloud span, .mini-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(213,181,106,0.12);
  color: var(--amber);
  font-size: 12px;
  border: 1px solid rgba(213,181,106,0.22);
}
.expert-meta {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}
.expert-actions {
  display: flex; gap: 10px; margin-top: 14px;
}
.expert-actions a {
  padding: 10px 14px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.03);
  font-size: 13px;
}
.logo-pill {
  text-align: center;
  font-family: var(--condensed);
  font-size: 1.2rem;
  color: var(--amber);
}
.step-no {
  font-family: var(--condensed);
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 10px;
}
.faq-list { display: grid; gap: 14px; }
.faq-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px 10px 20px 10px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
}
.faq-question {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 20px; border: none; background: transparent; color: var(--text); text-align: left; font-size: 1rem;
}
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  color: var(--muted);
  line-height: 1.8;
}
.faq-item.is-open .faq-answer { display: block; }
.contact-panel, .mcp-panel { margin-top: 16px; }
.contact-list { display: grid; gap: 10px; color: var(--muted); }
.contact-list strong { color: var(--text); }
.share-bar {
  display: flex; flex-wrap: wrap; gap: 12px;
}
.share-btn {
  padding: 14px 18px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05); color: var(--text);
}
.breadcrumb {
  margin-bottom: 14px; color: var(--amber); font-size: 13px;
}
.sub-hero__copy { min-height: 100%; }
.tag-cloud { gap: 12px; }
.site-footer {
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 34px 12px 34px 12px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
}
.footer-grid {
  display: grid; grid-template-columns: 1.2fr 0.9fr 0.8fr; gap: 24px; align-items: start;
}
.footer-logo { width: 220px; }
.footer-qrs {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.footer-qrs figure { margin: 0; text-align: center; color: var(--muted); }
.footer-qrs img {
  width: 180px; height: 180px; border-radius: 18px; border: 1px solid rgba(255,255,255,0.08); background: #fff7ee;
}
.footer-links {
  display: grid; gap: 10px;
}
.footer-links a {
  color: var(--amber); padding-bottom: 8px; border-bottom: 1px dashed rgba(255,255,255,0.12);
}
.footer-bottom {
  display: flex; justify-content: space-between; gap: 20px; margin-top: 20px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.08); color: var(--muted);
}
.toast {
  position: fixed; right: 20px; bottom: 20px; z-index: 100;
  padding: 14px 18px; border-radius: 14px; background: rgba(8,20,35,0.94); color: var(--text);
  border: 1px solid rgba(213,181,106,0.28); box-shadow: var(--shadow); opacity: 0; transform: translateY(16px); transition: all 0.25s ease;
}
.toast.is-visible { opacity: 1; transform: translateY(0); }
@media (max-width: 1180px) {
  .hero-section, .sub-hero, .split-layout, .split-layout.reverse, .footer-grid, .search-strip { grid-template-columns: 1fr; }
  .video-grid, .steps-grid, .testimonial-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 840px) {
  .page-shell { width: min(100% - 20px, 1360px); }
  .site-header { position: static; }
  .top-rail { grid-template-columns: 1fr; }
  .brand-lockup { justify-content: flex-start; }
  .brand-logo { width: 180px; }
  .search-form { grid-template-columns: 1fr; border-radius: 24px; }
  .search-label { display: none; }
  .metric-strip, .service-grid, .json-grid, .experts-grid, .logo-wall, .mini-grid, .video-grid, .steps-grid, .testimonial-grid { grid-template-columns: 1fr; }
  .hero-copy, .sub-hero__copy, .section-block, .site-footer { padding: 22px 18px; }
  .footer-bottom { flex-direction: column; }
}