/* ============================================================
   灵核计划官网 - 暗调科技风样式表
   主色: #0A1020 | 辅色: #00E5FF | 点缀: #9D5CFF
   ============================================================ */

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #0A1020;
  color: #FFFFFF;
  overflow-x: hidden;
  min-height: 100vh;
  cursor: default;
}

/* === Particle Canvas (全站动态背景) === */
#particleCanvas {
  position: fixed; top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 0; pointer-events: none;
}

/* === 鼠标跟随光晕 === */
#cursorGlow {
  position: fixed; width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,229,255,0.06) 0%, transparent 70%);
  pointer-events: none; z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #0A1020; }
::-webkit-scrollbar-thumb { background: #00E5FF; border-radius: 3px; }

/* === Navbar === */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.navbar.scrolled {
  padding: 0.5rem 0;
  background: rgba(10,16,32,0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid rgba(0,229,255,0.1);
}
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.5rem;
  text-decoration: none; color: #fff;
  font-size: 1.3rem; font-weight: 700;
}
.logo-icon { font-size: 1.5rem; }
.nav-menu { display: flex; gap: 2rem; }
.nav-link {
  color: #B0C4DE; text-decoration: none;
  font-size: 0.95rem; font-weight: 500;
  position: relative; padding: 0.25rem 0;
  transition: color 0.3s;
}
.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 0; height: 2px;
  background: #00E5FF; transition: width 0.3s;
}
.nav-link:hover, .nav-link.active { color: #FFFFFF; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; box-shadow: 0 0 8px #00E5FF; }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-btn-user { display: flex; align-items: center; gap: 4px; background: rgba(0,229,255,0.06); border: 1px solid rgba(0,229,255,0.1); border-radius: 20px; padding: 2px 8px 2px 2px; text-decoration: none; transition: all 0.3s; cursor: pointer; position: relative; }
.nav-btn-user:hover { background: rgba(0,229,255,0.12); border-color: rgba(0,229,255,0.25); }
.nav-btn-user:hover .logout-tip { opacity: 1; }
.avatar-circle { width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; color: #fff; font-weight: 700; flex-shrink: 0; box-shadow: 0 0 10px rgba(0,0,0,0.2); }
.user-avatar-mini { display: flex; align-items: center; gap: 4px; }
.logout-tip { font-size: 0.7rem; color: #ff4757; opacity: 0; transition: opacity 0.2s; white-space: nowrap; }
.nav-user-dropdown { position: relative; }
.user-dropdown-menu { display: none !important; position: absolute; top: calc(100% + 6px); right: 0; flex-direction: column; background: rgba(10,16,32,0.95); backdrop-filter: blur(16px); border: 1px solid rgba(0,229,255,0.12); border-radius: 10px; padding: 0.4rem; min-width: 140px; box-shadow: 0 8px 32px rgba(0,0,0,0.4); z-index: 9999; }
.nav-user-dropdown:hover .user-dropdown-menu { display: flex !important; }
.user-dropdown-item { display: flex; align-items: center; gap: 8px; padding: 0.55rem 0.8rem; color: #B0C4DE; text-decoration: none; font-size: 0.82rem; border-radius: 6px; transition: all 0.2s; }
.user-dropdown-item:hover { background: rgba(0,229,255,0.08); color: #fff; }
.user-dropdown-item.logout-item:hover { color: #ff4757; background: rgba(255,71,87,0.08); }
.admin-only { opacity: 0.5; font-size: 0.75rem; }
.nav-btn-secondary {
  font-size: 0.8rem; color: #B0C4DE; text-decoration: none;
  padding: 0.35rem 0.8rem; border: 1px solid rgba(176,196,222,0.3);
  border-radius: 4px; transition: all 0.3s;
}
.nav-btn-secondary:hover { color: #fff; border-color: #00E5FF; }
.nav-btn-primary {
  background: rgba(0,229,255,0.15); color: #00E5FF;
  text-decoration: none; padding: 0.5rem 1.2rem;
  border-radius: 6px; font-size: 0.85rem; font-weight: 600;
  border: 1px solid rgba(0,229,255,0.3);
  transition: all 0.3s; white-space: nowrap;
}
.nav-btn-primary:hover {
  background: rgba(0,229,255,0.25);
  box-shadow: 0 0 20px rgba(0,229,255,0.3);
  transform: scale(1.05);
}

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: #fff; transition: all 0.3s;
  border-radius: 1px;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* === Sections Common === */
main { position: relative; z-index: 2; }
.section { padding: 6rem 1.5rem; position: relative; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-inner.narrow { max-width: 860px; }
.section-title {
  font-size: 2.2rem; text-align: center;
  margin-bottom: 3rem; font-weight: 700;
  background: linear-gradient(135deg, #fff, #00E5FF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-title {
  font-size: 2.5rem; text-align: center;
  margin-bottom: 3rem; font-weight: 700;
  background: linear-gradient(135deg, #fff, #00E5FF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Hero Banner === */
.hero-section {
  min-height: 100vh; display: flex; align-items: center;
  justify-content: center; text-align: center;
  position: relative; overflow: hidden;
}
.hero-section::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 80vmax; height: 80vmax;
  background: radial-gradient(circle, rgba(0,229,255,0.03) 0%, transparent 60%);
  transform: translate(-50%, -50%);
  animation: heroPulse 8s ease-in-out infinite;
}
@keyframes heroPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}
.hero-content { position: relative; z-index: 2; padding: 2rem; }
.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800; margin-bottom: 1rem;
  animation: fadeUp 1s 0.2s both;
}
.glow-text {
  text-shadow: 0 0 30px rgba(0,229,255,0.3),
               0 0 60px rgba(0,229,255,0.15);
}
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.6rem);
  color: #00E5FF; margin-bottom: 0.8rem;
  animation: fadeUp 1s 0.5s both;
}
.hero-desc {
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  color: #B0C4DE; margin-bottom: 2rem;
  animation: fadeUp 1s 0.8s both;
}
.hero-buttons {
  display: flex; gap: 1.5rem; justify-content: center;
  flex-wrap: wrap; animation: fadeUp 1s 1.1s both;
}

/* === Buttons === */
.btn-primary, .btn-secondary {
  display: inline-block; padding: 0.9rem 2.2rem;
  border-radius: 8px; font-size: 1rem; font-weight: 600;
  text-decoration: none; transition: all 0.3s;
  cursor: pointer;
}
.btn-primary {
  background: #00E5FF; color: #0A1020;
  border: none;
}
.btn-primary:hover {
  box-shadow: 0 0 30px rgba(0,229,255,0.4);
  transform: translateY(-2px);
}
.btn-secondary {
  background: transparent; color: #00E5FF;
  border: 1px solid #00E5FF;
}
.btn-secondary:hover {
  background: rgba(0,229,255,0.1);
  box-shadow: 0 0 20px rgba(0,229,255,0.2);
}
.btn-lg { padding: 1rem 2.5rem; font-size: 1.1rem; }
.btn-cta { font-size: 1.2rem; padding: 1.2rem 3rem; }
.pulse-btn { animation: pulseGlow 2s ease-in-out infinite; }
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,229,255,0.4); }
  50% { box-shadow: 0 0 20px 10px rgba(0,229,255,0.2); }
}

/* === Scroll Indicator === */
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column;
  align-items: center; gap: 0.5rem;
  color: #B0C4DE; font-size: 0.8rem;
  animation: fadeUp 1s 1.5s both;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid #00E5FF;
  border-bottom: 2px solid #00E5FF;
  transform: rotate(45deg);
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.4; }
  50% { transform: rotate(45deg) translate(5px, 5px); opacity: 1; }
}

/* === Glass Cards === */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.glass-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(0,229,255,0.1);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative; overflow: hidden;
}
.glass-card::before {
  content: ''; position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
    rgba(0,229,255,0.05) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.4s;
  pointer-events: none;
}
.glass-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0,229,255,0.3);
  box-shadow: 0 8px 40px rgba(0,229,255,0.08);
}
.glass-card:hover::before { opacity: 1; }
.card-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.glass-card h3 {
  font-size: 1.15rem; margin-bottom: 0.6rem;
  color: #fff; font-weight: 600;
}
.glass-card p { color: #B0C4DE; font-size: 0.9rem; line-height: 1.6; }

/* === Flow Diagram === */
.flow-diagram {
  display: flex; align-items: center;
  justify-content: center; gap: 0.5rem;
  flex-wrap: wrap; max-width: 100%;
  overflow-x: auto; padding: 1rem 0;
}
.flow-step {
  display: flex; flex-direction: column;
  align-items: center; gap: 0.5rem;
  padding: 1rem 1.2rem;
  border-radius: 12px;
  border: 1px solid rgba(0,229,255,0.15);
  background: rgba(0,229,255,0.03);
  min-width: 100px;
  transition: all 0.5s;
}
.flow-step.active {
  border-color: #00E5FF;
  background: rgba(0,229,255,0.1);
  box-shadow: 0 0 20px rgba(0,229,255,0.15);
}
.step-icon { font-size: 1.8rem; }
.step-label { font-size: 0.8rem; color: #B0C4DE; text-align: center; }
.flow-arrow { color: #00E5FF; font-size: 1.5rem; }

/* === Features === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.feature-item {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.2rem;
  border-radius: 10px;
  border: 1px solid rgba(0,229,255,0.08);
  transition: all 0.3s;
}
.feature-item:hover {
  border-color: rgba(0,229,255,0.25);
  background: rgba(0,229,255,0.03);
  transform: translateX(5px);
}
.feat-icon { font-size: 1.5rem; }
.feat-text { color: #B0C4DE; font-size: 0.95rem; }

/* === CTA === */
.cta-section {
  text-align: center; padding: 8rem 1.5rem;
  position: relative;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,229,255,0.03) 0%, transparent 70%);
}
.cta-inner { position: relative; z-index: 2; }
.cta-title {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: 2.5rem; font-weight: 700;
}

/* === Architecture Diagram === */
.arch-diagram {
  display: flex; flex-direction: column;
  gap: 1rem; max-width: 800px; margin: 0 auto 3rem;
}
.arch-layer {
  border: 1px solid var(--layer-color, rgba(0,229,255,0.2));
  border-radius: 12px; padding: 1.2rem 1.5rem;
  background: rgba(255,255,255,0.02);
  transition: all 0.3s;
  cursor: pointer;
}
.arch-layer:hover {
  background: rgba(255,255,255,0.05);
  transform: scale(1.02);
  box-shadow: 0 0 20px color-mix(in srgb, var(--layer-color) 20%, transparent);
}
.layer-header {
  display: flex; align-items: center; gap: 0.8rem;
  margin-bottom: 0.5rem;
}
.layer-icon { font-size: 1.5rem; }
.layer-name {
  font-size: 1.1rem; font-weight: 600;
  color: var(--layer-color, #00E5FF);
}
.layer-desc { color: #B0C4DE; font-size: 0.85rem; }

/* Tech Specs */
.tech-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem; max-width: 800px; margin: 0 auto;
}
.spec-item {
  padding: 1rem; border: 1px solid rgba(0,229,255,0.08);
  border-radius: 10px; text-align: center;
}
.spec-label { display: block; color: #00E5FF; font-size: 0.85rem; margin-bottom: 0.4rem; }
.spec-value { color: #B0C4DE; font-size: 0.9rem; }

/* === Products Slider === */
.products-slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.product-card {
  text-align: center;
}
.product-icon { font-size: 3rem; margin-bottom: 1rem; } /* fallback: keep emoji style */
.product-icon-img { width: 48px; height: 48px; object-fit: contain; border-radius: 8px; }
.product-card h3 { margin-bottom: 0.8rem; }
.product-card p { font-size: 0.85rem; line-height: 1.6; }
.slider-controls {
  display: flex; justify-content: center;
  align-items: center; gap: 1rem; margin-top: 2rem;
}

/* === Developer Layout === */
.dev-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
}
.dev-sidebar {
  position: sticky; top: 6rem;
  align-self: flex-start;
}
.dev-nav { display: flex; flex-direction: column; gap: 0.5rem; }
.dev-nav-link {
  display: block; padding: 0.8rem 1rem;
  color: #B0C4DE; text-decoration: none;
  border-radius: 8px; font-size: 0.95rem;
  border-left: 3px solid transparent;
  transition: all 0.3s;
}
.dev-nav-link:hover, .dev-nav-link.active {
  color: #fff; background: rgba(0,229,255,0.05);
  border-left-color: #00E5FF;
}
.dev-tab { display: none; }
.dev-tab.active { display: block; }

/* === Content Rich === */
.content-rich { line-height: 1.8; color: #B0C4DE; }
.content-rich h2 { font-size: 1.5rem; color: #fff; margin: 2rem 0 1rem; }
.content-rich h3 { font-size: 1.15rem; color: #00E5FF; margin: 1.5rem 0 0.8rem; }
.content-rich p { margin-bottom: 1rem; }
.content-rich ul, .content-rich ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.content-rich li { margin-bottom: 0.5rem; }
.content-rich code {
  background: rgba(0,229,255,0.1); color: #00E5FF;
  padding: 0.15rem 0.5rem; border-radius: 4px;
  font-size: 0.9rem;
}

/* === Contact === */
.contact-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(0,229,255,0.1);
  border-radius: 16px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
}
.contact-company { text-align: center; margin-bottom: 1.5rem; }
.contact-company h2 { font-size: 1.3rem; color: #fff; margin-bottom: 0.3rem; }
.contact-tagline { color: #00E5FF; font-size: 0.85rem; }
.contact-divider {
  border: none; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.2), transparent);
  margin: 0 0 1.5rem;
}
.contact-info-grid { display: flex; flex-direction: column; gap: 1rem; }
.contact-item {
  display: flex; align-items: flex-start; gap: 1rem;
  padding: 0.8rem 1rem;
  border-radius: 10px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(0,229,255,0.05);
  transition: all 0.3s;
}
.contact-item:hover {
  background: rgba(0,229,255,0.04);
  border-color: rgba(0,229,255,0.15);
  transform: translateX(5px);
}
.contact-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 0.1rem; }
.contact-item > div { display: flex; flex-direction: column; }
.contact-label { font-size: 0.75rem; color: #5a6a7e; margin-bottom: 0.15rem; }
.contact-value { font-size: 0.9rem; color: #B0C4DE; }
.contact-value a { color: #00E5FF; text-decoration: none; }
.contact-value a:hover { text-decoration: underline; }
.contact-phone { color: #00E5FF; font-weight: 600; letter-spacing: 0.5px; }
@media (max-width: 768px) {
  .contact-card { padding: 1.5rem; }
  .contact-item { padding: 0.6rem 0.8rem; gap: 0.7rem; }
  .contact-icon { font-size: 1.2rem; }
  .contact-value { font-size: 0.82rem; }
  .contact-company h2 { font-size: 1.1rem; }
}

/* === Philosophy === */
.philo-block {
  margin-bottom: 3rem;
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.04);
  position: relative;
}
.philo-block::before {
  content: ''; position: absolute; left: 0; top: 0;
  width: 3px; height: 100%;
  background: linear-gradient(to bottom, #00E5FF, #9D5CFF);
  border-radius: 2px;
}
.progress-bar-vertical {
  position: fixed; right: 2rem; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 200px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px; overflow: hidden;
}
.progress-bar-vertical::after {
  content: ''; display: block;
  height: var(--scroll-progress, 0%);
  background: linear-gradient(to bottom, #00E5FF, #9D5CFF);
  border-radius: 2px;
  transition: height 0.2s;
}

/* === Footer === */
.footer {
  position: relative; z-index: 2;
  border-top: 1px solid rgba(0,229,255,0.08);
  padding: 2rem 1.5rem;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 1rem;
  font-size: 0.8rem; color: #5a6a7e;
}
.footer a { color: #7a8a9e; text-decoration: none; transition: color 0.3s; }
.footer a:hover { color: #00E5FF; }
.footer-center { display: flex; gap: 1.5rem; }

/* === Animations === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
[data-anim] {
  opacity: 0; transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-anim].visible {
  opacity: 1; transform: translateY(0);
}

/* === Responsive === */

/* ========== 平板 (768-1024) ========== */
@media (max-width: 1024px) {
  .section-inner { padding: 0 1rem; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .products-slider { grid-template-columns: repeat(2, 1fr); }
  .tech-specs { grid-template-columns: repeat(2, 1fr); }
  .arch-diagram { max-width: 100%; }
  .dev-layout { gap: 2rem; }
}

/* ========== 手机 (<=768) ========== */
@media (max-width: 768px) {
  /* 导航 */
  .nav-inner { padding: 0 1rem; }
  .nav-menu {
    position: fixed; top: 0; right: -100%;
    width: 280px; height: 100vh;
    flex-direction: column; padding: 5rem 2rem;
    background: rgba(10,16,32,0.97);
    backdrop-filter: blur(20px);
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 0.5rem;
    border-left: 1px solid rgba(0,229,255,0.1);
    z-index: 1001;
  }
  .nav-menu.open { right: 0; }
  .hamburger { display: flex; z-index: 1002; }
  .nav-actions .nav-btn-primary { display: none; }
  .nav-actions .nav-btn-secondary { font-size: 0.75rem; padding: 0.25rem 0.6rem; }
  .nav-logo { font-size: 1.1rem; }

  /* 通用 */
  .section { padding: 3.5rem 0.8rem; }
  .section-title { font-size: 1.5rem; margin-bottom: 1.5rem; }
  .page-title { font-size: 1.6rem; margin-bottom: 1.5rem; }

  /* 首页 Hero */
  .hero-content { padding: 1rem; }
  .hero-title { font-size: 1.8rem; }
  .hero-subtitle { font-size: 0.95rem; }
  .hero-desc { font-size: 0.8rem; }
  .hero-buttons { flex-direction: column; align-items: center; gap: 0.8rem; }
  .btn-lg { width: 100%; max-width: 280px; text-align: center; padding: 0.85rem 1.5rem; font-size: 0.95rem; }
  .btn-cta { width: 100%; max-width: 320px; text-align: center; padding: 1rem 2rem; font-size: 1rem; }

  /* 卡片 */
  .cards-grid { grid-template-columns: 1fr; gap: 1rem; }
  .glass-card { padding: 1.5rem; }
  .glass-card h3 { font-size: 1rem; }
  .glass-card p { font-size: 0.85rem; }
  .card-icon { font-size: 2rem; }

  /* 技术流程 */
  .flow-diagram { flex-direction: column; gap: 0.2rem; padding: 0.5rem 0; }
  .flow-arrow { transform: rotate(90deg); font-size: 1rem; }
  .flow-step { flex-direction: row; width: 100%; min-width: unset; padding: 0.6rem 1rem; }
  .step-icon { font-size: 1.2rem; }
  .step-label { font-size: 0.8rem; }

  /* 功能特性 */
  .features-grid { grid-template-columns: 1fr; gap: 0.5rem; }
  .feature-item { padding: 0.7rem 0.8rem; }
  .feat-icon { font-size: 1.2rem; }
  .feat-text { font-size: 0.85rem; }

  /* CTA */
  .cta-section { padding: 4rem 1rem; }
  .cta-title { font-size: 1.3rem; }

  /* 技术架构 */
  .arch-layer { padding: 0.8rem 1rem; }
  .arch-layer:hover { transform: none; }
  .layer-icon { font-size: 1.2rem; }
  .layer-name { font-size: 0.95rem; }
  .layer-desc { font-size: 0.8rem; }
  .tech-specs { grid-template-columns: 1fr; gap: 0.5rem; }

  /* 产品能力 */
  .products-slider { grid-template-columns: 1fr; gap: 1rem; }
  .product-card h3 { font-size: 1rem; }
  .product-card p { font-size: 0.8rem; }
  .product-icon { font-size: 2.2rem; }

  /* 灵核理念 */
  .philo-block { padding: 1.2rem; margin-bottom: 1.5rem; }
  .philo-block h2 { font-size: 1.1rem; }
  .philo-block p { font-size: 0.85rem; }

  /* 开发者中心 */
  .dev-layout { grid-template-columns: 1fr; gap: 1rem; }
  .dev-sidebar { position: static; top: auto; }
  .dev-nav { flex-direction: row; flex-wrap: wrap; gap: 0.3rem; }
  .dev-nav-link { padding: 0.5rem 0.8rem; font-size: 0.8rem; border-left: none; border-bottom: 2px solid transparent; }
  .dev-nav-link.active { border-left: none; border-bottom-color: #00E5FF; }

  /* 页脚 */
  .footer-inner { flex-direction: column; text-align: center; gap: 0.8rem; font-size: 0.7rem; }
  .footer-center { flex-direction: column; gap: 0.5rem; }

  /* 隐藏桌面专用 */
  #cursorGlow { display: none; }
  .progress-bar-vertical { display: none; }
  .scroll-indicator { bottom: 0.8rem; }
  .scroll-indicator span { font-size: 0.7rem; }

  /* 安装页步骤条 */
  .progress-bar { flex-wrap: wrap; gap: 0; }
  .progress-step { font-size: 0.65rem; padding: 0.4rem 0.6rem; }
  .progress-step .step-num { width: 18px; height: 18px; font-size: 0.6rem; }

  /* 安装页表单 */
  .form-row { grid-template-columns: 1fr; gap: 0; }

  /* slier controls for mobile */
  .slider-controls { display: flex !important; }
}

/* ========== 小屏手机 (<=480) ========== */
@media (max-width: 480px) {
  .section { padding: 2.5rem 0.5rem; }
  .hero-title { font-size: 1.5rem; }
  .hero-subtitle { font-size: 0.85rem; }
  .hero-desc { font-size: 0.75rem; }
  .hero-buttons { gap: 0.6rem; }
  .btn-lg { max-width: 240px; padding: 0.7rem 1.2rem; font-size: 0.85rem; }
  .btn-cta { max-width: 280px; padding: 0.8rem 1.5rem; font-size: 0.9rem; }
  .section-title { font-size: 1.3rem; }
  .page-title { font-size: 1.3rem; }
  .cards-grid { gap: 0.8rem; }
  .glass-card { padding: 1rem; }
  .tech-specs { gap: 0.4rem; }
  .spec-item { padding: 0.7rem; }
  .spec-value { font-size: 0.8rem; }
  .flow-step { padding: 0.4rem 0.8rem; }
  .install-wrapper { padding: 5rem 0.8rem 2rem; }
  .install-card { padding: 1.2rem; }
  .install-card h2 { font-size: 1rem; }

  /* Admin */
  .admin-main { padding: 0.8rem; }
  .admin-card { padding: 1rem; }
  .admin-header h1 { font-size: 1.2rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .stat-value { font-size: 1.3rem; }
  .table-wrap { font-size: 0.75rem; }
  th, td { padding: 0.5rem 0.4rem; }
}

/* ========== 超小屏 (<=360) ========== */
@media (max-width: 360px) {
  .hero-title { font-size: 1.3rem; }
  .nav-logo .logo-text { display: none; }
  .hamburger { margin-left: auto; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}