/* 科幻电影海报风：中心主体、宏大标题、探索未至之境 */
:root {
  --space-black: #06080e;
  --nebula-dark: #0c101a;
  --nebula-panel: #131926;
  --nebula-card: #192233;
  --star-cyan: #00f2fe;
  --deep-blue: #4facfe;
  --supernova-glow: #ff007f;
  --amber-core: #ffaa00;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-glow: rgba(0, 242, 254, 0.25);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-cinema: "Cinzel", "Trajan Pro", "Times New Roman", "PingFang SC", serif;
  --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--space-black);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(79, 172, 254, 0.15) 0%, transparent 60%),
    radial-gradient(circle at 10% 30%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 70%, rgba(0, 242, 254, 0.08) 0%, transparent 50%),
    linear-gradient(rgba(12, 16, 26, 0.98), rgba(6, 8, 14, 0.99));
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部太空控制台导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(6, 8, 14, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-glow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 16px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 14px rgba(0, 242, 254, 0.3);
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
}

.brand-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--star-cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.5px;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.6);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--star-cyan), var(--deep-blue));
  box-shadow: 0 0 8px var(--star-cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #06080e;
  font-weight: 700;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(0, 242, 254, 0.7);
  background: linear-gradient(135deg, #38ef7d 0%, #11998e 100%);
  color: #fff;
}

.btn-secondary {
  background: rgba(25, 34, 51, 0.8);
  color: #fff;
  border-color: var(--border-glow);
}

.btn-secondary:hover {
  border-color: var(--star-cyan);
  background: rgba(30, 41, 59, 0.9);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--star-cyan);
  color: var(--star-cyan);
}

/* 电影海报导语与徽章 */
.cinema-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--star-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.cinema-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--star-cyan);
  box-shadow: 0 0 8px var(--star-cyan);
}

/* 面包屑导航 */
.breadcrumb-wrap {
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.breadcrumb-item a:hover {
  color: var(--star-cyan);
}

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.2);
}

/* 首屏 Hero：科幻电影海报核心区 */
.poster-hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.poster-header {
  max-width: 960px;
  margin: 0 auto 36px;
}

.poster-h1 {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: #fff;
  margin-bottom: 18px;
  text-transform: uppercase;
  text-shadow: 0 0 30px rgba(79, 172, 254, 0.4);
}

.poster-h1 .glow-text {
  background: linear-gradient(135deg, #00f2fe 10%, #4facfe 50%, #ff007f 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.poster-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

.poster-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.poster-meta {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 12px 28px;
  background: rgba(19, 25, 38, 0.6);
  border: 1px solid var(--border-glow);
  border-radius: 30px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.poster-meta span {
  color: var(--star-cyan);
  font-weight: 600;
  font-family: var(--font-mono);
}

/* 中心主体：宏大发光海报框 */
.poster-center-visual {
  margin-top: 48px;
  position: relative;
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
}

.poster-center-visual::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 10%;
  right: 10%;
  bottom: -20px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.25) 0%, rgba(255, 0, 127, 0.1) 40%, transparent 70%);
  filter: blur(40px);
  z-index: 1;
}

.poster-frame {
  position: relative;
  z-index: 2;
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 242, 254, 0.2);
}

.poster-frame img {
  border-radius: 10px;
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.poster-caption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

/* 核心价值：用问题、能力与结果建立相关性 (3模块) */
.section-pad {
  padding: 72px 0;
}

.section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 52px;
}

.section-h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
}

.trio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.trio-card {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s ease;
}

.trio-card:hover {
  transform: translateY(-6px);
  border-color: var(--star-cyan);
  box-shadow: 0 12px 30px rgba(0, 242, 254, 0.15);
}

.trio-card-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--star-cyan);
  letter-spacing: 1px;
  margin-bottom: 10px;
  display: block;
}

.trio-card-h3 {
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: 12px;
}

.trio-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.trio-img-wrap {
  margin: 20px 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.trio-link {
  font-size: 0.9rem;
  color: var(--star-cyan);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
}

.trio-link:hover {
  color: #fff;
  text-shadow: 0 0 6px var(--star-cyan);
}

/* 4步探索推演全流程 */
.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

.path-node {
  background: rgba(19, 25, 38, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 22px;
  position: relative;
  transition: border-color 0.25s ease;
}

.path-node:hover {
  border-color: var(--star-cyan);
}

.node-step {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--star-cyan);
  opacity: 0.85;
  margin-bottom: 10px;
}

.node-h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 8px;
}

.node-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cinema-showcase {
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  border-radius: 14px;
  padding: 24px;
}

.cinema-showcase img {
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 100%;
}

.showcase-text {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 14px;
}

/* 功能与模式：卡片化星轨展示 */
.module-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.module-card {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.module-card:hover {
  border-color: var(--star-cyan);
  transform: translateY(-4px);
}

.module-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(0, 242, 254, 0.1);
  color: var(--star-cyan);
  margin-bottom: 14px;
}

.module-h3 {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 8px;
}

.module-target {
  font-size: 0.82rem;
  color: var(--amber-core);
  font-weight: 600;
  margin-bottom: 10px;
}

.module-task {
  font-size: 0.88rem;
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: 16px;
  line-height: 1.6;
}

.module-tools {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  margin-bottom: 12px;
}

/* 使用场景 4-6 个 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.scenario-card {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 24px;
}

.scenario-card:hover {
  border-color: var(--deep-blue);
}

.scenario-h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scenario-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.6;
}

.scenario-img {
  border-radius: 8px;
  margin-bottom: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.scenario-link {
  font-size: 0.86rem;
  color: var(--star-cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
}

/* 下载客户端与安装引导 */
.deploy-console {
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 38px;
}

.platform-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.os-card {
  background: rgba(12, 16, 26, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  transition: all 0.25s ease;
}

.os-card:hover {
  border-color: var(--star-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.2);
}

.os-title {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 8px;
}

.os-info {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: 18px;
}

.os-hash {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--star-cyan);
  background: rgba(0, 0, 0, 0.4);
  padding: 5px 8px;
  border-radius: 4px;
  margin-top: 10px;
  word-break: break-all;
}

.guide-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

.guide-item h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 8px;
}

.guide-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 开发者 API 接入终端 */
.api-matrix {
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 36px;
}

.api-two-col {
  display: grid;
  grid-template-columns: 1.1fr 1.1fr;
  gap: 36px;
  align-items: center;
}

.api-text h3 {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 14px;
}

.api-text p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.api-ul {
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.api-ul li {
  margin-bottom: 10px;
  padding-left: 20px;
  position: relative;
}

.api-ul li::before {
  content: "✦";
  position: absolute;
  left: 0;
  color: var(--star-cyan);
}

.terminal-shell {
  background: #04060a;
  border: 1px solid var(--border-glow);
  border-radius: 10px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #e2e8f0;
  overflow-x: auto;
  line-height: 1.6;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.kw-blue { color: #38bdf8; }
.kw-pink { color: #f43f5e; }
.kw-green { color: #4ade80; }

/* 真实案例背书 */
.case-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.case-box {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 26px;
  position: relative;
}

.case-box:hover {
  border-color: var(--star-cyan);
}

.case-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.case-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(0, 242, 254, 0.15);
  border: 1px solid var(--star-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--star-cyan);
}

.case-title-box h4 {
  font-size: 0.98rem;
  color: #fff;
}

.case-title-box span {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.case-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* FAQ 常见问题网格 */
.faq-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.faq-card {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 22px;
}

.faq-q {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 10px;
  font-weight: 600;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-q::before {
  content: "✦";
  color: var(--star-cyan);
  font-family: var(--font-mono);
  font-size: 1.1rem;
}

.faq-a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-left: 22px;
}

/* 内容中心索引 */
.hub-four-col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.hub-box {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 22px;
  display: block;
  transition: all 0.25s ease;
}

.hub-box:hover {
  border-color: var(--star-cyan);
  transform: translateY(-3px);
}

.hub-h3 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 6px;
}

.hub-p {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* 网页版专属推演工作台 (web.html) */
.web-lab-wrapper {
  display: grid;
  grid-template-columns: 290px 1fr 310px;
  gap: 22px;
  margin: 36px 0;
  min-height: 590px;
}

.lab-panel {
  background: var(--nebula-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.lab-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.lab-panel-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.case-index-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.case-index-item {
  background: rgba(12, 16, 26, 0.8);
  border-left: 3px solid var(--star-cyan);
  padding: 10px 14px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.case-index-item:hover {
  background: #1c2638;
}

.case-index-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.case-index-sub {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--star-cyan);
}

.hologram-stage {
  position: relative;
  background: #080b12;
  border: 1px dashed var(--border-glow);
  border-radius: 10px;
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-image: 
    linear-gradient(rgba(0, 242, 254, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 242, 254, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}

.orbit-nodes {
  display: flex;
  justify-content: space-around;
  margin-top: 10px;
}

.orbit-card {
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  padding: 12px 18px;
  border-radius: 8px;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.2);
  text-align: center;
  max-width: 190px;
}

.orbit-card-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: #fff;
}

.orbit-card-val {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--star-cyan);
  margin-top: 4px;
}

.terminal-console {
  background: rgba(4, 6, 10, 0.85);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: 8px;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #94a3b8;
  max-height: 160px;
  overflow-y: auto;
  line-height: 1.6;
}

.lab-input-bar {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.lab-input {
  flex-grow: 1;
  background: rgba(12, 16, 26, 0.9);
  border: 1px solid var(--border-glow);
  border-radius: 6px;
  padding: 10px 16px;
  color: #fff;
  font-size: 0.88rem;
  min-width: 0;
}

.lab-input:focus {
  outline: none;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

/* 帮助中心检索框 */
.help-query-container {
  max-width: 720px;
  margin: 0 auto 36px;
}

.help-query-bar {
  display: flex;
  background: var(--nebula-panel);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  padding: 6px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.help-query-bar input {
  flex-grow: 1;
  background: transparent;
  border: none;
  padding: 10px 16px;
  color: #fff;
  font-size: 0.95rem;
  min-width: 0;
}

.help-query-bar input:focus {
  outline: none;
}

/* 页脚太空基地风格 */
.site-footer {
  background: #030407;
  border-top: 1px solid var(--border-glow);
  padding: 60px 0 32px;
  margin-top: 72px;
}

.footer-four-col {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-main h4 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.footer-main p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.footer-column h5 {
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-nav a:hover {
  color: var(--star-cyan);
}

.footer-bottom-bar {
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.disclaimer-pill {
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.3);
  padding: 6px 16px;
  border-radius: 20px;
  color: #7dd3fc;
}

/* 响应式断点适配 */
@media (max-width: 992px) {
  .poster-h1 {
    font-size: 2.4rem;
  }
  .trio-grid,
  .module-grid,
  .scenario-grid,
  .platform-row,
  .case-row,
  .hub-four-col {
    grid-template-columns: repeat(2, 1fr);
  }
  .path-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .api-two-col {
    grid-template-columns: 1fr;
  }
  .web-lab-wrapper {
    grid-template-columns: 1fr;
  }
  .footer-four-col {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner {
    height: auto;
    padding: 12px 0;
    flex-wrap: wrap;
  }
  .main-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 12px;
  }
  .poster-h1 {
    font-size: 1.85rem;
  }
  .trio-grid,
  .module-grid,
  .scenario-grid,
  .platform-row,
  .case-row,
  .hub-four-col,
  .faq-two-col,
  .path-grid,
  .guide-row {
    grid-template-columns: 1fr;
  }
  .footer-four-col {
    grid-template-columns: 1fr;
  }
  .orbit-nodes {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }
  .lab-input-bar {
    flex-direction: column;
  }
}