/* 星尘和光 - 深空科技风格 */

:root {
  --bg-deep: #0a0e17;
  --gold: #f0c060;
  --blue: #4da6ff;
  --text: #e0e6f0;
  --text-dim: #8899aa;
  --card-bg: rgba(15, 20, 35, 0.85);
  --glass: rgba(15, 20, 35, 0.7);
  --border: rgba(77, 166, 255, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg-deep);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

/* === Canvas 粒子背景 === */
#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* === 导航 === */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--gold);
}
nav a.nav-cta {
  color: var(--gold);
  font-weight: 700;
  font-size: 15px;
  padding: 6px 16px;
  border: 1.5px solid var(--gold);
  border-radius: 20px;
  transition: all 0.3s;
}
nav a.nav-cta:hover {
  background: var(--gold);
  color: var(--bg-deep);
}
nav a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 32px;
  font-size: 14px;
  transition: color 0.3s;
}
nav a:hover { color: var(--blue); }

/* === Hero === */
#hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
}
.hero-content { max-width: 680px; }
.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: clamp(18px, 3vw, 26px);
  color: var(--text);
  margin-bottom: 12px;
}
.hero-tag {
  font-size: 15px;
  color: var(--text-dim);
  max-width: 480px;
  margin: 0 auto;
}

/* === 通用 Section === */
section {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
}
.section-title {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 48px;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--blue);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* === 服务卡片 === */
.cards {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(8px);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  cursor: default;
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 0 8px 32px rgba(77,166,255,0.1);
}
.service-card.card-expanded {
  border-color: var(--blue);
  box-shadow: 0 12px 48px rgba(77,166,255,0.15);
  transform: none;
}
.service-card-inner { padding: 32px 24px; }
.card-expanded .service-card-inner { padding-bottom: 0; }

/* Badge */
.srv-badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--blue);
  background: rgba(77,166,255,0.1);
  border: 1px solid rgba(77,166,255,0.2);
  border-radius: 20px;
  letter-spacing: 0.5px;
}
.service-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.service-icon { font-size: 36px; }
.service-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 10px;
}
.service-desc {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 14px;
  line-height: 1.6;
}

/* Tags */
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.service-tag {
  font-size: 11px;
  color: var(--blue);
  background: rgba(77,166,255,0.08);
  border: 1px solid rgba(77,166,255,0.2);
  border-radius: 6px;
  padding: 3px 10px;
  white-space: nowrap;
}

/* 展开按钮 */
.srv-expand-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px;
  border: 1px solid rgba(77,166,255,0.2);
  border-radius: 8px;
  background: rgba(77,166,255,0.06);
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.srv-expand-btn:hover {
  background: rgba(77,166,255,0.12);
  border-color: var(--blue);
}
.srv-expand-btn.btn-expanded {
  background: rgba(77,166,255,0.15);
  border-color: var(--blue);
}
.srv-chevron {
  font-size: 10px;
  transition: transform 0.3s;
}
.btn-expanded .srv-chevron { transform: rotate(180deg); }

/* 详情面板 */
.srv-detail-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s ease;
  margin-top: 0;
}
.srv-detail-panel.expanded {
  max-height: 2000px;
  opacity: 1;
  margin-top: 20px;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  0% { opacity: 0; transform: translateY(-10px); }
  100% { opacity: 1; transform: translateY(0); }
}
.srv-detail-overview {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.srv-detail-overview p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}
.srv-detail-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.srv-detail-section {
  margin-bottom: 24px;
}

/* 场景列表 */
.srv-scenario-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.srv-scenario-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-dim);
  padding: 8px 0;
}
.srv-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(77,166,255,0.12);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

/* 流程网格 */
.srv-process-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.srv-process-mini {
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}
.srv-process-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 4px;
}
.srv-process-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}
.srv-process-desc {
  font-size: 11px;
  color: var(--text-dim);
}

/* 工作流横幅 */
.srv-workflow-bar {
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--blue);
  border-radius: 8px;
  padding: 14px 16px;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.8;
}

/* 技术栈网格 */
.srv-tech-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.srv-tech-col {
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
}
.srv-tech-cat {
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}
.srv-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.srv-tech-tag {
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(77,166,255,0.06);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
}

/* 交付物 */
.srv-deliver-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}
.srv-deliver-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  padding: 8px 10px;
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.srv-check {
  width: 18px;
  height: 18px;
  color: #4ade80;
  flex-shrink: 0;
}

/* 工具行 */
.srv-tools-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.srv-tool-badge {
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
}

/* 报价条 */
.srv-price-bar {
  margin-top: 12px;
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(240,192,96,0.08), rgba(77,166,255,0.06));
  border: 1px solid var(--gold);
  border-radius: 8px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--gold);
}

/* 完整页链接 */
.srv-full-link {
  display: block;
  text-align: center;
  padding: 14px;
  margin-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--blue);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: color 0.2s, background 0.2s;
  border-radius: 0 0 12px 12px;
}
.srv-full-link:hover {
  color: var(--text);
  background: rgba(77,166,255,0.06);
}

/* === 技术信任条 === */
#trust {
  padding-top: 0;
  text-align: center;
}
.trust-bar {
  max-width: 900px;
  margin: 0 auto;
  padding: 10px 0;
}
.trust-bar .label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
  opacity: 0.7;
}
.trust-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.trust-tag {
  font-size: 13px;
  color: var(--text-dim);
  background: rgba(15,20,35,0.8);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 16px;
}

/* === 关于 === */
.glass-card {
  max-width: 760px;
  margin: 0 auto;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 48px 40px;
  backdrop-filter: blur(8px);
}
#about .section-title { text-align: left; margin-bottom: 20px; }
#about .section-title::after { margin: 12px 0 0; }
#about p { font-size: 15px; color: var(--text-dim); line-height: 1.8; }

/* === 流程 === */
#process { text-align: center; }
.process-steps {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.process-step {
  flex: 1;
  min-width: 180px;
  max-width: 210px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 16px;
  text-align: center;
}
.step-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 8px;
  opacity: 0.6;
}
.process-step h3 {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 6px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-dim);
}

/* === CTA === */
.cta-card {
  max-width: 600px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(240,192,96,0.1), rgba(77,166,255,0.08));
  border: 1px solid var(--gold);
  border-radius: 14px;
  padding: 48px 40px;
  text-align: center;
}
.cta-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cta-sub {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.cta-btn {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  color: var(--bg-deep);
  background: linear-gradient(135deg, var(--gold), #d4a040);
  padding: 14px 40px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta-btn:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 20px rgba(240,192,96,0.3);
}
.cta-hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 12px;
  opacity: 0.7;
}

/* === 联系 === */
.contact-card { text-align: center; }
.contact-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 32px;
}
.contact-list { text-align: left; }
.contact-item {
  font-size: 14px;
  color: var(--text-dim);
  padding: 10px 0;
  display: flex;
  gap: 12px;
  align-items: baseline;
}
.contact-item strong {
  font-size: 14px;
  color: var(--text);
  white-space: nowrap;
  min-width: 64px;
}
.contact-item span {
  font-size: 14px;
  color: var(--text-dim);
}
.contact-qr {
  text-align: center;
  padding-top: 10px;
}
.contact-qr img {
  border-radius: 8px;
  border: 2px solid var(--border);
}
.qr-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

/* 公众号关注引导块 */
.wechat-follow {
  max-width: 760px;
  margin: 48px auto 0;
  padding: 28px 32px;
  background: rgba(15,20,35,0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.wechat-follow-img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  border: 2px solid var(--border);
}
.wechat-follow-text h4 {
  font-size: 16px;
  color: var(--gold);
  margin-bottom: 6px;
}
.wechat-follow-text p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* === Footer === */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}
.copyright {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.icp {
  font-size: 12px;
  color: var(--text-dim);
  opacity: 0.6;
}
.icp a {
  color: var(--text-dim);
  text-decoration: none;
}
.icp a:hover {
  color: var(--blue);
}

/* === 服务详情页 === */
.service-hero {
  min-height: auto;
  padding: 140px 24px 60px;
  text-align: center;
}
.service-hero .hero-icon {
  font-size: 64px;
  margin-bottom: 20px;
}
.service-hero .hero-sub {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 560px;
  margin: 12px auto 0;
}
.service-breadcrumb {
  text-align: center;
  margin-bottom: 40px;
}
.service-breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.3s;
}
.service-breadcrumb a:hover { color: var(--blue); }
.service-breadcrumb span {
  color: var(--text-dim);
  opacity: 0.5;
  margin: 0 8px;
  font-size: 12px;
}
.service-breadcrumb .current {
  color: var(--gold);
  font-size: 13px;
}

/* 能力列表 */
.capability-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.capability-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 28px;
  transition: border-color 0.3s;
}
.capability-item:hover { border-color: var(--blue); }
.capability-item h3 {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 8px;
}
.capability-item p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* 场景列表 */
.scenario-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.scenario-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
  padding: 12px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.scenario-item .check {
  color: var(--blue);
  font-size: 16px;
  flex-shrink: 0;
}

/* 技术栈网格 */
.tech-stack-grid {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.tech-stack-col {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
}
.tech-stack-col h3 {
  font-size: 14px;
  color: var(--gold);
  margin-bottom: 10px;
}
.tech-stack-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tech-stack-col li {
  font-size: 13px;
  color: var(--text-dim);
  padding: 2px 0;
}

/* 交付物列表 */
.deliverable-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.deliverable-item {
  font-size: 14px;
  color: var(--text-dim);
  padding: 12px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.deliverable-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
}

/* 工作流横幅 */
.workflow-bar {
  max-width: 760px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 1px solid var(--blue);
  border-radius: 10px;
  padding: 20px 28px;
  text-align: center;
}
.workflow-bar p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.8;
}

/* 工具网格 */
.tool-grid {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.tool-badge {
  font-size: 13px;
  color: var(--text-dim);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 18px;
}

/* 报价条 */
.price-bar {
  max-width: 760px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(240,192,96,0.08), rgba(77,166,255,0.06));
  border: 1px solid var(--gold);
  border-radius: 10px;
  padding: 20px 28px;
  text-align: center;
}
.price-bar p {
  font-size: 16px;
  color: var(--gold);
  font-weight: 600;
}
.related-links {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.related-link {
  display: inline-block;
  padding: 10px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  transition: border-color 0.3s, color 0.3s;
}
.related-link:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* === 响应式 === */
@media (max-width: 600px) {
  nav a { margin-left: 20px; }
  .glass-card { padding: 32px 24px; }
  .contact-info { gap: 24px; }
  .service-hero { padding: 120px 24px 40px; }
  .service-hero .hero-icon { font-size: 48px; }
  .process-steps { flex-direction: column; align-items: center; }
}