/* =====================================================
   涵蓄网络科技工作室 — 响应式适配
   7 Breakpoints: 1440, 1200, 992, 768, 430, 390, 360
   ===================================================== */

/* === 1440px — 大屏微调 === */
@media (max-width: 1440px) {
  :root {
    --container-max: 1140px;
    --section-padding: 90px;
  }

  .hero-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }

  .footer-grid {
    gap: 36px;
  }
}

/* === 1200px — 中等屏幕 === */
@media (max-width: 1200px) {
  :root {
    --container-max: 960px;
    --section-padding: 80px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .process-steps::before {
    display: none;
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

  .service-content-list {
    grid-template-columns: 1fr;
  }

  .about-content {
    gap: 40px;
  }
}

/* === 992px — 平板横屏 === */
@media (max-width: 992px) {
  :root {
    --section-padding: 70px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 1;
  }

  .hero-visual {
    order: 0;
    margin-bottom: 20px;
  }

  .hero-illustration {
    max-width: 400px;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .btn-group {
    justify-content: center;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .ps-arrow {
    padding-top: 0;
    justify-content: center;
  }

  .ps-arrow svg {
    transform: rotate(90deg);
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .about-visual {
    min-height: 280px;
  }

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

  .service-detail {
    padding: 32px;
  }

  .entity-info-grid {
    grid-template-columns: 1fr;
  }

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

  .article-nav {
    flex-direction: column;
  }
}

/* === 768px — 平板竖屏 === */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
    --nav-height: 64px;
  }

  /* Navigation - Mobile */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: 100vh;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--nav-height) + 20px) 24px 24px;
    gap: 4px;
    transition: right var(--transition-base);
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-md);
  }

  .nav-link:hover,
  .nav-link.active {
    background: rgba(37, 99, 235, 0.06);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
  }

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

  .nav-toggle {
    display: flex;
  }

  /* Grids */
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-auto {
    grid-template-columns: 1fr;
  }

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

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .client-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  /* Forms */
  .form-grid {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 32px 24px;
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--nav-height) + 30px);
    min-height: auto;
    padding-bottom: 60px;
  }

  .hero-illustration {
    max-width: 300px;
  }

  /* Section */
  .section-header {
    margin-bottom: 40px;
  }

  .section-desc {
    font-size: 1rem;
  }

  /* Service detail */
  .service-detail {
    padding: 24px;
  }

  .service-detail-header {
    flex-direction: column;
    text-align: center;
  }

  .service-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .service-tab {
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* Values */
  .values-grid {
    grid-template-columns: 1fr;
  }

  /* Solution */
  .solution-card {
    padding: 28px;
  }

  /* Page header */
  .page-header {
    padding: calc(var(--nav-height) + 40px) 0 40px;
  }

  /* CTA */
  .cta-section {
    padding: 60px 0;
  }
}

/* === 430px — 大屏手机 === */
@media (max-width: 430px) {
  :root {
    --section-padding: 50px;
  }

  .container,
  .container-wide {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-illustration {
    max-width: 260px;
  }

  .btn {
    padding: 11px 22px;
    font-size: 0.9rem;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-group .btn {
    width: 100%;
    justify-content: center;
  }

  .card {
    padding: 24px;
  }

  .service-card {
    padding: 28px;
  }

  .step-number {
    width: 60px;
    height: 60px;
    font-size: 1.2rem;
  }

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

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

  .stat-number {
    font-size: 2.5rem;
  }

  .industry-tag {
    font-size: 0.82rem;
    padding: 6px 16px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .section-desc {
    font-size: 0.95rem;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer-inner {
    padding: 0 18px 16px;
    font-size: 0.9rem;
  }

  .contact-form {
    padding: 24px 18px;
  }

  .contact-info-card {
    padding: 28px;
  }

  .footer {
    padding: 48px 0 0;
  }

  .entity-info {
    padding: 24px;
  }
}

/* === 390px — iPhone 标准适配 === */
@media (max-width: 390px) {
  .hero-title {
    font-size: 1.6rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
    margin-bottom: 28px;
  }

  h2 {
    font-size: 1.45rem;
  }

  h3 {
    font-size: 1.15rem;
  }

  .nav-brand-name {
    font-size: 1rem;
  }

  .nav-brand-sub {
    font-size: 0.65rem;
  }

  .section-badge {
    font-size: 0.78rem;
    padding: 5px 12px;
  }

  .card-title {
    font-size: 1.1rem;
  }

  .service-card-title {
    font-size: 1.2rem;
  }

  .advantage-card {
    padding: 28px 20px;
  }

  .advantage-icon {
    width: 60px;
    height: 60px;
  }

  .advantage-icon svg {
    width: 28px;
    height: 28px;
  }
}

/* === 360px — 小屏手机 === */
@media (max-width: 360px) {
  .container,
  .container-wide {
    padding: 0 14px;
  }

  body {
    font-size: 15px;
  }

  .hero-title {
    font-size: 1.45rem;
  }

  .hero-subtitle {
    font-size: 0.85rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  .btn {
    padding: 10px 18px;
    font-size: 0.85rem;
  }

  .btn-lg {
    padding: 12px 24px;
    font-size: 0.92rem;
  }

  .card {
    padding: 20px;
  }

  .service-card {
    padding: 24px;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .service-detail {
    padding: 20px;
  }

  .service-detail-title {
    font-size: 1.25rem;
  }

  .contact-form {
    padding: 20px 14px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .footer-title {
    font-size: 0.95rem;
  }

  .footer-link {
    font-size: 0.85rem;
  }

  .entity-info {
    padding: 20px;
  }

  .entity-info-item {
    flex-direction: column;
    gap: 2px;
  }

  .nav-brand svg {
    width: 30px;
    height: 30px;
  }
}

/* === Print === */
@media print {
  .navbar,
  .back-to-top,
  .nav-overlay,
  .cta-section {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }

  .hero {
    background: #f5f5f5;
    min-height: auto;
    padding: 40px 0;
  }

  .card,
  .service-card,
  .solution-card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }

  .footer {
    background: #f5f5f5;
    color: #333;
  }
}