/* ============================================
   DAWA.AI - Responsive Styles (Enhanced)
   Premium Mobile-First Design - Future Tech
   ============================================ */

/* ========== Extra Large (1400px+) ========== */
@media (min-width: 1400px) {
  .container {
    max-width: var(--container-2xl);
  }

  .title-line {
    font-size: 3rem;
  }

  .hero-section {
    padding-top: 120px;
  }
}

/* ========== Large (1200px - 1399px) ========== */
@media (max-width: 1399px) {
  .scenarios-grid {
    gap: 20px;
  }

  .projects-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .navbar-nav {
    gap: 4px;
  }
}

/* ========== Medium (992px - 1199px) ========== */
@media (max-width: 1199px) {
  section {
    padding: 80px 0;
  }

  .title-line {
    font-size: 3.5rem;
  }

  .section-title {
    font-size: var(--font-4xl);
  }

  /* Hero Stats FX Responsive - Tablet */
  .hero-stats-fx {
    display: none !important;
    /* gap: 40px; */
  }

  .stat-fx-item {
    padding: 20px;
  }

  .stat-fx-glow {
    width: 100px;
    height: 100px;
  }

  .stat-fx-ring {
    width: 80px;
    height: 80px;
  }

  .stat-fx-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-lg);
  }

  .stat-fx-number {
    font-size: var(--font-4xl);
  }

  .stat-fx-label {
    font-size: 0.6875rem;
  }

  .stat-fx-pulse {
    width: 120px;
    height: 120px;
  }

  .connector-line:nth-child(1) {
    left: calc(33% - 20px);
    width: 40px;
  }

  .connector-line:nth-child(2) {
    left: calc(66% - 20px);
    width: 40px;
  }

  .hero-stats {
    gap: 16px;
  }

  .stat-number {
    font-size: var(--font-3xl);
  }

  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .comparison-wrapper {
    /* grid-template-columns: 1fr; */
    grid-template-columns: 1fr auto 1fr;
    gap: 8px;
    max-width: 100%;
  }

  .comparison-divider {
    order: 1;
    padding: 16px 0;
    position: relative;
  }

  .comparison-divider .vs-icon {
    /* position: absolute;
    transform: rotate(90deg); */
    width: 30px;
    height: 30px;
    font-size: var(--font-base);
  }

  .comparison-side.traditional {
    order: 0;
  }

  .comparison-side.filmos2 {
    order: 2;
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========== Tablet (768px - 991px) ========== */
@media (max-width: 991px) {
  section {
    padding: var(--section-padding-mobile) 0;
  }

  .comparison-side .side-summary {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .comparison-side .benefit-item {
    font-size: var(--font-xs);
  }

  .comparison-side .summary-value {
    font-size: var(--font-sm);
  }

  .hero-section {
    padding-top: 100px;
    min-height: auto;
  }

  .hero-content .row {
    flex-direction: column;
  }

  /* Hero Stats FX 移动端显示 */
  .hero-stats-fx {
    display: flex;
    width: 100%;
    margin-top: 32px;
    order: 2;
  }

  .hero-visual {
    margin-top: 48px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .title-line {
    font-size: 3rem;
  }

  .title-sub {
    font-size: var(--font-lg);
  }

  .hero-description {
    font-size: var(--font-base);
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-hero-primary,
  .btn-hero-secondary {
    width: 100%;
    justify-content: center;
  }

  .section-title {
    font-size: var(--font-3xl);
  }

  .section-subtitle {
    font-size: var(--font-base);
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .scenario-card {
    padding: 24px;
  }

  .timeline-container {
    padding-left: 0;
  }

  .timeline-track {
    left: 24px;
  }

  .timeline-item {
    flex-direction: column !important;
    padding-left: 80px;
  }

  .timeline-marker {
    left: 24px;
    transform: translateX(0);
    /* width: 48px;
    height: 48px; 
    border-radius: 50%;*/
    width: 60px;
    height: 30px;
    border-radius: 10px;
  }

  .marker-year {
    font-size: var(--font-3xs);
    letter-spacing: 0;
  }

  .timeline-content {
    width: 100%;
    /* margin: 16px 0 0 0 !important; */
    margin: 34px 0 0 0 !important;
    text-align: left !important;
  }

  .content-achievements {
    justify-content: flex-start !important;
  }

  .output-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  /* 平板端横向卡片跨两列 */
  .work-card-horizontal {
    grid-column: span 2;
    aspect-ratio: 2.5/1;
  }

  .work-card-horizontal .work-img-label {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-info {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .info-card {
    flex: 0 0 calc(33.333% - 16px);
    min-width: 150px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-brand {
    text-align: center;
    justify-content: center;
  }

  .footer-links {
    text-align: center;
  }

  .footer-row {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  /* Mobile Navigation */
  .navbar-collapse {
    background: rgba(0, 8, 20, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-top: 16px;
    border: 1px solid var(--glass-border);
  }

  .navbar-nav {
    flex-direction: column;
    gap: 8px;
  }

  .nav-link {
    padding: 12px 16px;
    text-align: left;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 16px;
  }

  .nav-cta .btn {
    width: 100%;
  }

  /* Carousel Mobile */
  .carousel-container {
    padding: 0 16px;
  }

  .carousel-slide {
    aspect-ratio: 4 / 3;
  }

  .carousel-overlay {
    padding: 24px;
  }

  .carousel-title {
    font-size: 1.5rem;
  }

  .carousel-description {
    font-size: 1rem;
    margin-bottom: 16px;
  }

  .carousel-cta {
    padding: 12px 24px;
    font-size: 0.875rem;
  }

  /* ========== 工作流四行蛇形布局（768-991px） ========== */
  /* 每行2个步骤，线条+箭头连接 */

  .workflow-steps {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    position: relative;
    padding: 0;
    overflow: visible !important;
  }

  /* 隐藏PC端连线 */
  .workflow-diagram .workflow-steps::before {
    display: none;
  }

  .workflow-steps::after {
    display: none;
  }

  /* 每个步骤占50%宽度 */
  .workflow-step {
    flex: 0 0 50%;
    position: relative;
    padding: 20px 16px 32px 16px;
    overflow: visible !important;
  }

  /* 隐藏PC端原有的连线 */
  .workflow-step::after {
    display: none !important;
  }

  /* ========== 蛇形布局顺序 ========== */
  /* 第1行：剧本解析 → 分镜生成（左→右） */
  .workflow-step:nth-child(1) {
    order: 1;
  }

  .workflow-step:nth-child(2) {
    order: 2;
  }

  /* 第2行：场景搭建 ← 资源调度（右←左） */
  .workflow-step:nth-child(3) {
    order: 4;
  }

  /* 资源调度-右 */
  .workflow-step:nth-child(4) {
    order: 3;
  }

  /* 场景搭建-左 */
  /* 第3行：虚拟预演 → 拍摄执行（左→右） */
  .workflow-step:nth-child(5) {
    order: 5;
  }

  .workflow-step:nth-child(6) {
    order: 6;
  }

  /* 第4行：视频成片 ← 后期制作（右←左） */
  .workflow-step:nth-child(7) {
    order: 8;
  }

  /* 后期制作-右 */
  .workflow-step:nth-child(8) {
    order: 7;
  }

  /* 视频成片-左 */

  /* ========== 水平连线（行内） ========== */
  /* 第1行连线：剧本解析→分镜生成 */
  .workflow-step:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(1).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第2行连线：场景搭建←资源调度（从右到左） */
  .workflow-step:nth-child(4)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第3行连线：虚拟预演→拍摄执行 */
  .workflow-step:nth-child(5)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第4行连线：后期制作→视频成片（从右到左） */
  .workflow-step:nth-child(8)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(270deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* ========== 行间转折连线 ========== */
  /* 第1→2行转折：分镜生成(右) → 资源调度(右下) */
  .workflow-step:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第2→3行转折：场景搭建(左) → 虚拟预演(左下) */
  .workflow-step:nth-child(4)::after {
    content: '';
    position: absolute;
    top: 70px;
    left: 50%;
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    display: block !important;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::after {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第3→4行转折：拍摄执行(右) → 后期制作(右下) */
  .workflow-step:nth-child(6)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* ========== 箭头（指示流程方向） ========== */
  /* 第1行箭头→右（指向分镜生成） */
  .workflow-step:nth-child(2) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→左（指向场景搭建） */
  .workflow-step:nth-child(3) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(3).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→下（资源调度向下） */
  .workflow-step:nth-child(4) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2→3行转折箭头（场景搭建向下） */
  .workflow-step:nth-child(5) .step-node::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 17px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-accent-400);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3行箭头→右（指向拍摄执行） */
  .workflow-step:nth-child(6) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第4行箭头→左（指向视频成片） */
  .workflow-step:nth-child(7) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(7).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3→4行转折箭头（后期制作向下） */
  .workflow-step:nth-child(8) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 移动端步骤样式 */
  .workflow-step .step-node {
    width: 48px;
    height: 48px;
    position: relative;
  }

  .workflow-step .step-label {
    font-size: var(--font-xs);
    white-space: nowrap;
  }
}

/* ========== Small Mobile (576px - 767px) ========== */
@media (max-width: 767px) {
  section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .title-line {
    font-size: 2.5rem;
  }

  .comparison-side .benefit-item {
    font-size: var(--font-xxs);
  }

  .title-sub {
    font-size: var(--font-base);
  }

  /* FilmOS Section Title Responsive */
  .filmos-section .section-title {
    letter-spacing: 0.05em;
    word-spacing: 0.1em;
    font-size: var(--font-2xl);
  }

  .filmos-section .section-subtitle {
    letter-spacing: 0.12em;
    word-spacing: 0.15em;
    font-size: var(--font-sm);
  }

  /* Hero Stats FX Responsive */
  .hero-stats-fx {
    flex-direction: column;
    gap: 32px;
    padding: 16px 0;
  }

  .stat-fx-item {
    padding: 20px;
    width: 100%;
    max-width: 280px;
  }

  .stat-fx-glow {
    width: 100px;
    height: 100px;
  }

  .stat-fx-ring {
    width: 80px;
    height: 80px;
  }

  .stat-fx-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-lg);
  }

  .stat-fx-number {
    font-size: var(--font-4xl);
  }

  .stat-fx-label {
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
  }

  .stat-fx-pulse {
    width: 120px;
    height: 120px;
  }

  .stat-fx-connectors {
    display: none;
  }

  .hero-badge {
    flex-direction: column;
    gap: 4px;
    padding: 6px 12px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .hero-scroll-indicator {
    display: none;
  }

  .section-title {
    font-size: var(--font-2xl);
  }

  .scenario-card {
    padding: 20px;
  }

  .scenario-icon-wrapper {
    width: 60px;
    height: 60px;
  }

  .scenario-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }

  .scenario-title {
    font-size: var(--font-xl);
  }

  .comparison-side {
    padding: 20px;
  }

  .process-step {
    padding: 8px 0;
  }

  .visual-card {
    padding: 16px;
  }

  .workflow-flow {
    flex-wrap: wrap;
    gap: 6px;
  }

  .flow-node {
    flex: 0 0 calc(20% - 6px);
    min-width: 60px;
  }

  /* ========== 工作流四行蛇形布局（768-991px） ========== */
  /* 每行2个步骤，线条+箭头连接 */

  .workflow-steps {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    position: relative;
    padding: 0;
    overflow: visible !important;
  }

  /* 隐藏PC端连线 */
  .workflow-diagram .workflow-steps::before {
    display: none;
  }

  .workflow-steps::after {
    display: none;
  }

  /* 每个步骤占50%宽度 */
  .workflow-step {
    flex: 0 0 50%;
    position: relative;
    padding: 20px 16px 32px 16px;
    overflow: visible !important;
  }

  /* 隐藏PC端原有的连线 */
  .workflow-step::after {
    display: none !important;
  }

  /* ========== 蛇形布局顺序 ========== */
  /* 第1行：剧本解析 → 分镜生成（左→右） */
  .workflow-step:nth-child(1) {
    order: 1;
  }

  .workflow-step:nth-child(2) {
    order: 2;
  }

  /* 第2行：场景搭建 ← 资源调度（右←左） */
  .workflow-step:nth-child(3) {
    order: 4;
  }

  /* 资源调度-右 */
  .workflow-step:nth-child(4) {
    order: 3;
  }

  /* 场景搭建-左 */
  /* 第3行：虚拟预演 → 拍摄执行（左→右） */
  .workflow-step:nth-child(5) {
    order: 5;
  }

  .workflow-step:nth-child(6) {
    order: 6;
  }

  /* 第4行：视频成片 ← 后期制作（右←左） */
  .workflow-step:nth-child(7) {
    order: 8;
  }

  /* 后期制作-右 */
  .workflow-step:nth-child(8) {
    order: 7;
  }

  /* 视频成片-左 */

  /* ========== 水平连线（行内） ========== */
  /* 第1行连线：剧本解析→分镜生成 */
  .workflow-step:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(1).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第2行连线：场景搭建←资源调度（从右到左） */
  .workflow-step:nth-child(4)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第3行连线：虚拟预演→拍摄执行 */
  .workflow-step:nth-child(5)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第4行连线：后期制作→视频成片（从右到左） */
  .workflow-step:nth-child(8)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(270deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* ========== 行间转折连线 ========== */
  /* 第1→2行转折：分镜生成(右) → 资源调度(右下) */
  .workflow-step:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第2→3行转折：场景搭建(左) → 虚拟预演(左下) */
  .workflow-step:nth-child(4)::after {
    content: '';
    position: absolute;
    top: 70px;
    left: 50%;
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    display: block !important;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::after {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第3→4行转折：拍摄执行(右) → 后期制作(右下) */
  .workflow-step:nth-child(6)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* ========== 箭头（指示流程方向） ========== */
  /* 第1行箭头→右（指向分镜生成） */
  .workflow-step:nth-child(2) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→左（指向场景搭建） */
  .workflow-step:nth-child(3) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(3).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→下（资源调度向下） */
  .workflow-step:nth-child(4) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2→3行转折箭头（场景搭建向下） */
  .workflow-step:nth-child(5) .step-node::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 17px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-accent-400);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3行箭头→右（指向拍摄执行） */
  .workflow-step:nth-child(6) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第4行箭头→左（指向视频成片） */
  .workflow-step:nth-child(7) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(7).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3→4行转折箭头（后期制作向下） */
  .workflow-step:nth-child(8) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 移动端步骤样式 */
  .workflow-step .step-node {
    width: 48px;
    height: 48px;
    position: relative;
  }

  .workflow-step .step-label {
    font-size: 10px;
    white-space: nowrap;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .project-card {
    padding: 12px;
  }

  .project-icon {
    font-size: 1.25rem;
  }

  .info-card {
    flex: 0 0 100%;
    padding: 16px;
  }

  .contact-form {
    padding: 20px;
  }

  .form-title {
    font-size: var(--font-lg);
  }

  .works-filter {
    flex-wrap: wrap;
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: var(--font-xs);
  }

  .work-card {
    aspect-ratio: 3/4;
  }

  /* 横向卡片在移动端跨两列，单独一行显示 */
  .work-card-horizontal {
    grid-column: span 2;
    aspect-ratio: 2/1;
  }

  .work-card-horizontal .work-img-label {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .work-overlay {
    padding: 16px;
  }

  .work-title {
    font-size: var(--font-base);
  }

  .footer-top {
    padding: 48px 0 24px;
  }

  .footer-bottom {
    padding: 16px 0;
  }

  .social-link {
    width: 32px;
    height: 32px;
    font-size: var(--font-sm);
  }

  .back-to-top {
    width: 40px;
    height: 40px;
    bottom: 24px;
    right: 24px;
  }
}

/* ========== Extra Small (< 576px) ========== */
@media (max-width: 575px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  section {
    padding: 48px 0;
  }

  .hero-section {
    padding-top: 94px;
    /* padding-top: 80px; */
  }

  .title-line {
    font-size: 2rem;
  }

  .title-sub {
    font-size: var(--font-sm);
  }

  .hero-description {
    font-size: var(--font-sm);
  }

  .section-title {
    font-size: var(--font-xl);
  }

  .section-subtitle {
    font-size: var(--font-sm);
  }

  .section-tag {
    font-size: 10px;
    padding: 4px 12px;
  }

  .scenario-card {
    padding: 16px;
  }

  .scenario-title {
    font-size: var(--font-lg);
  }

  .scenario-subtitle {
    font-size: var(--font-xs);
  }

  .scenario-features li {
    font-size: var(--font-xs);
    padding: 6px 0;
  }

  /* ========== 工作流四行蛇形布局（768-991px） ========== */
  /* 每行2个步骤，线条+箭头连接 */

  .workflow-steps {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    position: relative;
    padding: 0;
    overflow: visible !important;
  }

  /* 隐藏PC端连线 */
  .workflow-diagram .workflow-steps::before {
    display: none;
  }

  .workflow-steps::after {
    display: none;
  }

  /* 每个步骤占50%宽度 */
  .workflow-step {
    flex: 0 0 50%;
    position: relative;
    padding: 20px 16px 32px 16px;
    overflow: visible !important;
  }

  /* 隐藏PC端原有的连线 */
  .workflow-step::after {
    display: none !important;
  }

  /* ========== 蛇形布局顺序 ========== */
  /* 第1行：剧本解析 → 分镜生成（左→右） */
  .workflow-step:nth-child(1) {
    order: 1;
  }

  .workflow-step:nth-child(2) {
    order: 2;
  }

  /* 第2行：场景搭建 ← 资源调度（右←左） */
  .workflow-step:nth-child(3) {
    order: 4;
  }

  /* 资源调度-右 */
  .workflow-step:nth-child(4) {
    order: 3;
  }

  /* 场景搭建-左 */
  /* 第3行：虚拟预演 → 拍摄执行（左→右） */
  .workflow-step:nth-child(5) {
    order: 5;
  }

  .workflow-step:nth-child(6) {
    order: 6;
  }

  /* 第4行：视频成片 ← 后期制作（右←左） */
  .workflow-step:nth-child(7) {
    order: 8;
  }

  /* 后期制作-右 */
  .workflow-step:nth-child(8) {
    order: 7;
  }

  /* 视频成片-左 */

  /* ========== 水平连线（行内） ========== */
  /* 第1行连线：剧本解析→分镜生成 */
  .workflow-step:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(1).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第2行连线：场景搭建←资源调度（从右到左） */
  .workflow-step:nth-child(4)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第3行连线：虚拟预演→拍摄执行 */
  .workflow-step:nth-child(5)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* 第4行连线：后期制作→视频成片（从右到左） */
  .workflow-step:nth-child(8)::before {
    content: '';
    position: absolute;
    top: 44px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 1px;
    background: linear-gradient(270deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-line::before {
    opacity: 1;
    transform: scaleX(1);
  }

  /* ========== 行间转折连线 ========== */
  /* 第1→2行转折：分镜生成(右) → 资源调度(右下) */
  .workflow-step:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第2→3行转折：场景搭建(左) → 虚拟预演(左下) */
  .workflow-step:nth-child(4)::after {
    content: '';
    position: absolute;
    top: 70px;
    left: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-primary-400), var(--color-accent-400));
    z-index: 5;
    display: block !important;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-line::after {
    opacity: 1;
    transform: scaleY(1);
  }

  /* 第3→4行转折：拍摄执行(右) → 后期制作(右下) */
  .workflow-step:nth-child(6)::before {
    content: '';
    position: absolute;
    top: 70px;
    right: calc(50% - 2px);
    width: 1px;
    height: calc(100% - 52px);
    background: linear-gradient(180deg, var(--color-accent-400), var(--color-primary-400));
    z-index: 5;
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top center;
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-line::before {
    opacity: 1;
    transform: scaleY(1);
  }

  /* ========== 箭头（指示流程方向） ========== */
  /* 第1行箭头→右（指向分镜生成） */
  .workflow-step:nth-child(2) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(2).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→左（指向场景搭建） */
  .workflow-step:nth-child(3) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(3).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2行箭头→下（资源调度向下） */
  .workflow-step:nth-child(4) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(4).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第2→3行转折箭头（场景搭建向下） */
  .workflow-step:nth-child(5) .step-node::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 17px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-accent-400);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(5).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3行箭头→右（指向拍摄执行） */
  .workflow-step:nth-child(6) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-accent-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(6).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第4行箭头→左（指向视频成片） */
  .workflow-step:nth-child(7) .step-node::before {
    content: '';
    position: absolute;
    top: -9px;
    right: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid var(--color-primary-400);
    border-right: 5px solid transparent;
    border-left: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(7).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 第3→4行转折箭头（后期制作向下） */
  .workflow-step:nth-child(8) .step-node::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 45px;
    width: 0;
    height: 0;
    border-right: 8px solid var(--color-primary-400);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 6;
    opacity: 0;
    transform: scale(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .workflow-step:nth-child(8).animate-arrow .step-node::before {
    opacity: 1;
    transform: scale(1);
  }

  /* 移动端步骤样式 */
  .workflow-step .step-node {
    width: 48px;
    height: 48px;
    position: relative;
  }

  .workflow-step .step-label {
    font-size: 10px;
    white-space: nowrap;
  }

  .comparison-side {
    padding: 16px;
  }

  .side-title {
    font-size: var(--font-base);
  }

  .timeline-marker {
    /* width: 40px;
    height: 40px; */
  }

  .timeline-content {
    padding: 16px;
  }

  .content-title {
    font-size: var(--font-base);
  }

  .content-desc {
    font-size: var(--font-xs);
  }

  .achievement {
    padding: 4px 8px;
    font-size: 10px;
  }

  .projects-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .projects-title {
    font-size: var(--font-lg);
  }

  .work-placeholder {
    font-size: 2rem;
  }

  .btn-hero-primary,
  .btn-hero-secondary {
    padding: 12px 24px;
    font-size: var(--font-base);
  }

  .btn-submit {
    padding: 12px 24px;
  }
}

/* ========== Height Adjustments ========== */
@media (max-height: 700px) {
  .hero-section {
    min-height: auto;
    padding-top: 100px;
    padding-bottom: 60px;
  }

  .hero-stats {
    margin-bottom: 24px;
  }

  .hero-scroll-indicator {
    display: none;
  }
}

/* ========== Touch Device Optimizations ========== */
@media (hover: none) and (pointer: coarse) {

  .hover-lift:hover,
  .hover-scale:hover,
  .hover-glow:hover {
    transform: none;
    box-shadow: var(--shadow-card);
  }

  .work-overlay {
    opacity: 1;
    transform: translateY(0);
  }

  .btn:hover {
    transform: none;
  }
}

/* ========== Print Styles ========== */
@media print {

  .preloader,
  .glass-nav,
  .hero-bg,
  .section-bg,
  .back-to-top,
  .hero-scroll-indicator {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .glass-card,
  .scenario-card,
  .timeline-content,
  .comparison-side {
    background: white;
    border: 1px solid #ddd;
  }
}

/* ========== Dark Mode Preference ========== */
@media (prefers-color-scheme: light) {
  /* Keep dark theme for premium feel, no light mode switch */
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .preloader-progress {
    animation: none;
    width: 100%;
  }

  .scroll-icon {
    animation: none;
  }
}