/* ==========================================================================
   宣传印刷 · 首页样式
   设计基准宽度 1440px（内容容器 1352px），分区高度按 03-ui/ui-spec.md 预算
   ========================================================================== */


*,
*::before,
*::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

ul, ol { margin: 0; padding: 0; list-style: none; }

p { margin: 0; }

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.01em; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: var(--r-md);
  background: var(--blue);
  color: #fff;
  font-size: 13px;
  transition: top 0.15s var(--ease);
}
.skip-link:focus { top: 12px; }

.wrap {
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

/* ---------- 通用按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease), border-color 0.15s var(--ease), transform 0.15s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  padding: 0 22px;
  height: 42px;
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-dark); }

.btn-ghost {
  padding: 0 22px;
  height: 42px;
  border-color: #cfd6e0;
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.btn-light {
  padding: 0 26px;
  height: 46px;
  font-size: 15px;
  background: #fff;
  color: var(--blue);
  white-space: nowrap;
}
.btn-light:hover { background: #eef3fb; }

/* ---------- M0 头部 ---------- */

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 50;
  height: 70px;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 70px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--blue);
  flex: none;
}
.brand-mark { flex: none; }
.brand-name {
  color: var(--ink);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-inline: auto;
}
.nav-slogan { display: none; }

.nav-link {
  position: relative;
  padding: 6px 0;
  color: #35404f;
  font-size: 14px;
  white-space: nowrap;
  transition: color 0.15s var(--ease);
}
.nav-link:hover { color: var(--blue); }
.nav-link.is-active { color: var(--blue); font-weight: 600; }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
}

.header-cta { margin-left: 6px; height: 38px; padding: 0 18px; font-size: 13.5px; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 38px;
  margin-left: auto;
  border: 1px solid #cfd6e0;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  padding: 0;
  place-items: center;
  gap: 4px;
}
.nav-toggle-bar {
  display: block;
  width: 17px;
  height: 1.8px;
  margin: 3px auto;
  background: var(--ink);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

/* ---------- M1 首屏 ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-top: 70px;
  background: linear-gradient(180deg, var(--hero-1) 0%, var(--hero-2) 100%);
}

.hero-media {
  position: absolute;
  top: 73px;
  right: max(0px, calc((100% - 1440px) / 2));
  width: 570px;
  z-index: 1;
}
.hero-media img {
  width: 100%;
  height: auto;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--hero-1) 0%, rgba(242, 243, 247, 0.35) 7%, rgba(242, 243, 247, 0) 20%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 48px 0 26px 18px;
}

.hero-title {
  max-width: 620px;
  font-size: 48px;
  line-height: 1.17;
  color: var(--ink);
}

.hero-lead {
  max-width: 560px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 33px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  margin-top: 34px;
  color: #3d4858;
  font-size: 13.5px;
}
.hero-stats li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding-right: 26px;
  border-right: 1px solid #d8dde5;
}
.hero-stats li:last-child { border-right: 0; padding-right: 0; }
.hero-stats svg { color: var(--blue); flex: none; }

/* ---------- 区块标题 ---------- */

.section-title {
  font-size: 26px;
  line-height: 1.3;
  color: var(--ink);
}

/* ---------- M2 服务 ---------- */

.services { padding: 26px 0 8px; }
.services .section-title { margin-bottom: 16px; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.project-link { display: block; color: inherit; }
.site-footer .footer-inner { display: block; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 24px 36px; }
.footer-grid > * { flex: 1 1 190px; min-width: 170px; }
.footer-brand-col { flex: 1.4 1 280px; }
.footer-col ul { flex-direction: column; gap: 7px; }
.footer-icp { color: #93a3b9; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

.service-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.16s var(--ease), box-shadow 0.16s var(--ease), transform 0.16s var(--ease);
}
.service-card:hover {
  border-color: #cfd8e6;
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.service-thumb { display: block; }
.service-thumb img {
  width: 100%;
  aspect-ratio: 213 / 114;
  object-fit: cover;
}
.service-body {
  display: block;
  padding: 8px 12px 10px;
}
.service-name {
  display: block;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.35;
}
.service-desc {
  display: block;
  margin-top: 3px;
  color: var(--muted-2);
  font-size: 12px;
  line-height: 1.45;
}

/* ---------- M3 流程 ---------- */

.process {
  padding: 10px 0 23px;
  background: var(--bg-soft);
}
.process .section-title { margin-bottom: 8px; }

.process-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 26px;
}
.process-step {
  position: relative;
  padding: 0 4px;
  text-align: center;
}
.process-step + .process-step::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-top: 1.5px solid #c3ccd8;
  border-right: 1.5px solid #c3ccd8;
  transform: rotate(45deg);
}
.process-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
}
.process-name {
  margin-top: 46px;
  font-size: 15.5px;
  color: var(--ink);
}
.process-desc {
  margin-top: 6px;
  color: var(--muted-2);
  font-size: 12.5px;
  line-height: 1.55;
}

/* ---------- M4 工艺 ---------- */

.craft { padding: 0 0 24px; }
.craft .section-title { margin-bottom: 26px; }

.craft-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.craft-thumb img {
  width: 100%;
  aspect-ratio: 298 / 90;
  object-fit: cover;
  border-radius: 4px;
}
.craft-name {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--ink);
}
.craft-desc {
  margin-top: 6px;
  color: var(--muted-2);
  font-size: 12.5px;
  line-height: 1.55;
}

/* ---------- M5 项目类型 ---------- */

.projects { padding: 0 0 19px; }
.projects .section-title { margin-bottom: 24px; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.project-thumb img {
  width: 100%;
  aspect-ratio: 314 / 108;
  object-fit: cover;
  border-radius: 4px;
}
.project-name {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--ink);
}
.project-desc {
  margin-top: 5px;
  color: var(--muted-2);
  font-size: 12.5px;
  line-height: 1.55;
}
.projects-note {
  margin-top: 6px;
  text-align: center;
  color: #9aa2ae;
  font-size: 12px;
}

/* ---------- M6 质量控制 ---------- */

.quality { padding: 30px 0; }

.quality-inner {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 30px;
  align-items: center;
}

.quality-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}
.quality-item {
  display: flex;
  gap: 10px;
}
.quality-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: 1px;
  color: var(--blue);
}
.quality-icon svg { width: 24px; height: 24px; }
.quality-name {
  font-size: 14.5px;
  color: var(--ink);
}
.quality-desc {
  margin-top: 3px;
  color: var(--muted-2);
  font-size: 12px;
  line-height: 1.5;
}

/* ---------- M7 报价 ---------- */

.quote { padding: 4px 0 0; }

.quote-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  padding: 18px 34px 16px;
  border-radius: var(--r-xl);
  background: linear-gradient(110deg, #23599f 0%, #2b69b8 55%, #3576c4 100%);
  color: #fff;
}
.quote-title { font-size: 28px; line-height: 1.25; }
.quote-lead {
  max-width: 760px;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 13px;
  line-height: 1.7;
}
.quote-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.94);
  font-size: 12.5px;
}
.quote-tags li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}
.quote-tags svg { color: #a9c8ee; flex: none; }

.quote-photo {
  position: absolute;
  top: 0;
  right: 250px;
  height: 100%;
  width: auto;
  opacity: 0.42;
  mix-blend-mode: screen;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 34%, #000 72%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 34%, #000 72%, transparent 100%);
}

.quote-copy,
.quote-action { position: relative; z-index: 1; }

.quote-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}
.quote-mail {
  color: rgba(255, 255, 255, 0.88);
  font-size: 12.5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}
.quote-mail:hover { color: #fff; border-bottom-color: #fff; }

/* ---------- M8 FAQ ---------- */

.faq {
  padding: 22px 0 23px;
  background: var(--bg-soft);
}
.faq-inner {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}
.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 18px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  padding: 0 16px;
  transition: border-color 0.15s var(--ease);
}
.faq-item[open] { border-color: #cdd9e9; }
.faq-item summary {
  position: relative;
  padding: 13px 24px 13px 0;
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "";
  position: absolute;
  right: 2px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  background:
    linear-gradient(currentColor, currentColor) center / 10px 1.5px no-repeat,
    linear-gradient(currentColor, currentColor) center / 1.5px 10px no-repeat;
  color: #8d97a5;
  transition: transform 0.18s var(--ease);
}
.faq-item[open] summary::after { transform: rotate(135deg); }
.faq-item summary:hover { color: var(--blue); }
.faq-item p {
  padding: 0 0 14px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.65;
}

/* ---------- M9 页脚 ---------- */

.site-footer {
  background: var(--navy);
  color: #b9c5d6;
  padding-top: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 240px;
  gap: 40px;
  align-items: start;
}

.footer-mid {
  display: grid;
  gap: 12px;
}

.brand-light { color: #7fa8dd; }
.brand-light .brand-name { color: #fff; font-size: 19px; }
.footer-tagline {
  margin-top: 8px;
  color: #93a3b9;
  font-size: 12.5px;
}

.footer-col ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}
.footer-col a,
.footer-col li {
  color: #b9c5d6;
  font-size: 12.5px;
}
.footer-col a:hover { color: #fff; }
.footer-heading {
  margin-bottom: 10px;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}
.footer-contact p { font-size: 12.5px; line-height: 1.9; }
.footer-contact a { border-bottom: 1px solid rgba(185, 197, 214, 0.4); }
.footer-contact a:hover { color: #fff; border-bottom-color: #fff; }

.footer-bottom {
  margin-top: 16px;
  padding: 12px 0 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  color: #8797ad;
  font-size: 12px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1240px) {
  :root { --gutter: 32px; }
  .nav { gap: 16px; }
  .nav-link { font-size: 13.5px; }
  .service-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
  .service-thumb img { aspect-ratio: 300 / 176; }
  .footer-inner { grid-template-columns: 240px minmax(0, 1fr) 220px; }
}

@media (max-width: 1000px) {
  .hero-title { font-size: 38px; }
  .hero-media { width: 46%; opacity: 0.9; }
  .process-list { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px 24px; }
  .process-step + .process-step::before { display: none; }
  .craft-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .project-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quality-inner { grid-template-columns: 1fr; gap: 16px; }
  .quote-panel { grid-template-columns: 1fr; padding: 26px 28px; }
  .faq-inner { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 820px) {
  :root { --gutter: 20px; }
  .site-header { position: sticky; top: 0; background: rgba(255, 255, 255, 0.96); border-bottom: 1px solid var(--line); height: auto; backdrop-filter: blur(6px); }
  .header-inner { height: auto; flex-wrap: wrap; gap: 4px 16px; padding-top: 10px; padding-bottom: 8px; }
  .brand-name { font-size: 18px; }
  .nav-toggle { display: none !important; }
  .nav {
    position: static;
    display: flex;
    flex: 1 1 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 16px;
    margin: 0;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
  }
  .nav-slogan { display: none; }
  .nav-link { padding: 4px 0; border-bottom: 0; font-size: 14px; }
  .footer-grid { flex-direction: column; gap: 20px; }
  .footer-grid > * { flex: 1 1 auto; width: 100%; min-width: 0; }
  .header-cta { display: none; }
  .hero { padding-top: 0; display: flex; flex-direction: column; }
  .hero-inner { order: 1; }
  .hero-media { position: static; width: 100%; height: auto; order: 2; }
  .hero-media img { height: 240px; }
  .hero-media::after { display: none; }
  .hero-inner { padding: 30px 0 34px; }
  .hero-title { font-size: 30px; max-width: none; }
  .hero-lead { font-size: 14px; line-height: 1.7; margin-top: 14px; }
  .hero-actions { margin-top: 20px; }
  .hero-stats { margin-top: 22px; gap: 14px; font-size: 12.5px; }
  .hero-stats li { padding-right: 14px; }
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-list { grid-template-columns: 1fr; gap: 18px; text-align: left; }
  .process-step { display: grid; grid-template-columns: 40px 1fr; column-gap: 14px; text-align: left; padding: 0; }
  .process-icon { margin: 0; }
  .process-name { margin-top: 0; grid-column: 2; }
  .process-desc { grid-column: 2; margin-top: 2px; }
  .section-title { font-size: 22px; }
  .faq-list { grid-template-columns: 1fr; }
  .quote-tags { gap: 8px 16px; }
  .quote-title { font-size: 22px; }
  .footer-inner { grid-template-columns: 1fr; gap: 20px; }
  .footer-contact { grid-column: auto; }
  .quote-mail { word-break: break-all; }
}

@media (max-width: 520px) {
  .hero-title { font-size: 26px; }
  .hero-actions .btn { flex: 1 1 150px; }
  .service-thumb img { aspect-ratio: 3 / 2; }
  .craft-thumb img { aspect-ratio: 2 / 1; }
  .project-thumb img { aspect-ratio: 2 / 1; }
  .quality-list { grid-template-columns: 1fr; gap: 16px; }
  .quote-panel { padding: 22px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}