/* ================================================
   度士达科技官网 - 全站样式表 v2
   响应式设计 · Mobile First · 全模块动画增强
   ================================================ */

/* === CSS变量 === */
:root {
  --primary: #4F8EF7;
  --primary-dark: #2D5BE3;
  --primary-light: #93C5FD;
  --accent: #F59E0B;
  --bg-dark: #0A0E1A;
  --bg-card: #111827;
  --bg-card-hover: #1a2035;
  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(79,142,247,0.15);
  --gradient-primary: linear-gradient(135deg, #4F8EF7 0%, #2D5BE3 100%);
  --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  --font: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-w: 1200px;
  --nav-h: 72px;
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.25s; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* === 滚动条 === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
::selection { background: rgba(79,142,247,0.3); color: #fff; }

/* === 通用 === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.br-desktop { display: none; }
.gradient-text {
  background: linear-gradient(135deg, #4F8EF7 0%, #93C5FD 50%, #F59E0B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.accent { color: var(--primary-light); }

/* ================================================
   动画关键帧
   ================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.8); }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes borderGlow {
  0%, 100% { box-shadow: 0 0 0 rgba(79,142,247,0); }
  50% { box-shadow: 0 0 20px rgba(79,142,247,0.3); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes heroBgPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes bannerSlide {
  0% { opacity: 0; transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

/* ================================================
   导航栏
   ================================================ */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  transition: background 0.3s, backdrop-filter 0.3s, border-color 0.3s, box-shadow 0.3s;
  border-bottom: 1px solid transparent;
}
header.scrolled {
  background: rgba(10,14,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.nav-container {
  max-width: var(--max-w); margin: 0 auto; padding: 0 20px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; letter-spacing: -0.02em;
  transition: transform 0.3s var(--ease-spring);
  z-index: 1002; position: relative;
}
.nav-logo:hover { transform: scale(1.05); }
.nav-logo span { color: var(--text-primary); }

.nav-phone {
  display: none;
  align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: rgba(79,142,247,0.1);
  border: 1px solid rgba(79,142,247,0.2);
  color: var(--primary-light) !important;
  font-size: 0.85rem; font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s;
  white-space: nowrap;
}
.nav-phone:hover {
  background: rgba(79,142,247,0.2);
  border-color: rgba(79,142,247,0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(79,142,247,0.2);
}

.nav-links {
  display: none; align-items: center; gap: 28px;
}
.nav-links a {
  font-size: 0.875rem; font-weight: 500; color: var(--text-secondary);
  transition: color 0.25s; letter-spacing: 0.01em;
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--primary);
  transform: scaleX(0); transition: transform 0.3s var(--ease-out);
  border-radius: 2px;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.nav-active {
  color: var(--primary-light) !important;
}
.nav-links a.nav-active::after { transform: scaleX(1); }
.nav-cta {
  background: var(--gradient-primary);
  color: #fff !important; padding: 10px 22px !important;
  border-radius: var(--radius-sm); font-weight: 600 !important;
  transition: all 0.3s var(--ease-spring) !important;
  box-shadow: 0 4px 16px rgba(79,142,247,0.3);
}
.nav-cta:hover {
  opacity: 0.88; transform: translateY(-2px) scale(1.02) !important;
  box-shadow: 0 8px 24px rgba(79,142,247,0.4) !important;
}
.nav-cta::after { display: none !important; }

.hamburger {
  display: flex; flex-direction: column; gap: 5px;
  padding: 6px; z-index: 1002;
  transition: transform 0.3s;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: transform 0.3s var(--ease-spring), opacity 0.3s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单面板 */
.nav-links.active {
  display: flex !important;
  flex-direction: column;
  position: fixed; inset: 0;
  background: rgba(10,14,26,0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  justify-content: center;
  align-items: center;
  gap: 28px;
  z-index: 1000;
  animation: fadeInUp 0.35s var(--ease-out) both;
}
.nav-links.active a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 10px 20px;
}
.nav-links.active .nav-cta {
  margin-top: 12px;
  padding: 14px 36px !important;
  font-size: 1rem !important;
}

/* ================================================
   Banner 轮播图 + Hero 叠加（首屏合一）
   ================================================ */
.banner-section {
  width: 100%; padding: 0;
  background: #050810;
  position: relative;
  min-height: 600px;
}
.banner-carousel {
  position: relative; width: 100%; overflow: hidden; background: #050810;
}
.banner-track { position: relative; width: 100%; }
.banner-slide { display: none; width: 100%; position: relative; }
.banner-slide.active { display: block; animation: bannerSlide 0.6s var(--ease-out); }
.banner-slide img {
  width: 100%; max-height: 560px; height: auto;
  object-fit: cover; display: block;
}
@media (min-width: 640px) {
  .banner-slide img { max-height: 620px; }
  .banner-section { min-height: 680px; }
}
@media (min-width: 1024px) {
  .banner-slide img { max-height: 680px; }
  .banner-section { min-height: 740px; }
}
@media (min-width: 1440px) {
  .banner-slide img { max-height: 720px; }
  .banner-section { min-height: 780px; }
}

/* 图片叠加渐变遮罩（为右侧文字提供可读性） */
.banner-slide::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(
    to left,
    rgba(10,14,26,0.85) 0%,
    rgba(10,14,26,0.45) 50%,
    rgba(10,14,26,0.15) 100%
  );
  pointer-events: none;
}

/* === Hero 叠加层（右下角） === */
.banner-hero-overlay {
  position: absolute; bottom: 80px; right: 0;
  z-index: 5; padding: 0 24px;
  max-width: 600px;
  text-align: left;
  animation: fadeInRight 0.8s ease both;
}
@media (min-width: 640px) {
  .banner-hero-overlay { padding: 0 36px; bottom: 90px; max-width: 650px; }
}
@media (min-width: 1024px) {
  .banner-hero-overlay { padding: 0 56px; bottom: 100px; max-width: 700px; }
}

.banner-hero-overlay .hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 100px;
  background: rgba(79,142,247,0.12); border: 1px solid rgba(79,142,247,0.25);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  font-size: 0.72rem; font-weight: 700; color: var(--primary-light);
  letter-spacing: 0.06em; margin-bottom: 18px;
  animation: fadeInUp 0.8s ease both;
}
.badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--primary-light);
  animation: pulse 2s infinite;
}

.banner-hero-overlay .hero-title {
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  font-weight: 900; line-height: 1.15;
  letter-spacing: -0.03em; margin-bottom: 16px;
  animation: fadeInUp 0.8s 0.1s ease both;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.banner-hero-overlay .hero-title .gradient-text { display: block; }

.banner-hero-overlay .hero-sub {
  font-size: clamp(0.82rem, 1.8vw, 0.98rem);
  color: rgba(255,255,255,0.8); line-height: 1.75;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s 0.2s ease both;
  text-shadow: 0 1px 12px rgba(0,0,0,0.3);
}

/* === Banner 底部平台标签 === */
.banner-hero-overlay .hero-stats {
  display: flex; align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-sm);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 14px 18px; max-width: 480px;
  animation: fadeInUp 0.8s 0.4s ease both;
}
.banner-hero-overlay .hero-stats .stat-item { flex: 1; text-align: center; padding: 0 12px; }
.banner-hero-overlay .hero-stats .stat-num {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 900; color: var(--primary-light);
  font-family: 'Inter', sans-serif; letter-spacing: -0.02em;
  display: inline-block;
}
.banner-hero-overlay .hero-stats .stat-unit { font-size: clamp(0.8rem, 2vw, 1rem); font-weight: 700; color: var(--primary); }
.banner-hero-overlay .hero-stats .stat-label { display: block; font-size: 0.68rem; color: rgba(255,255,255,0.45); margin-top: 2px; font-weight: 500; }
.banner-hero-overlay .hero-stats .stat-divider { width: 1px; height: 28px; background: rgba(255,255,255,0.12); flex-shrink: 0; }

/* === Banner 底部平台标签 === */
.banner-platforms {
  position: absolute; bottom: 22px; left: 0; right: 0;
  z-index: 5; padding: 0 24px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: fadeInUp 0.8s 0.5s ease both;
}
@media (min-width: 1024px) {
  .banner-platforms { flex-direction: row; justify-content: center; gap: 16px; bottom: 20px; }
}
.banner-platforms .platform-label {
  font-size: 0.65rem; color: rgba(255,255,255,0.3);
  letter-spacing: 0.1em; text-transform: uppercase; white-space: nowrap;
}
.banner-platforms .platform-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.banner-platforms .platform-tag {
  padding: 4px 12px; border-radius: 100px;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  font-size: 0.72rem; font-weight: 500; color: rgba(255,255,255,0.55);
  transition: all 0.3s var(--ease-spring);
  cursor: default;
}
.banner-platforms .platform-tag:hover {
  background: rgba(79,142,247,0.15);
  border-color: rgba(79,142,247,0.3);
  color: var(--primary-light);
}


/* 轮播控制 */
.banner-dots {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px; z-index: 10;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,0.35); border: none;
  cursor: pointer; transition: all 0.4s var(--ease-spring);
  padding: 0;
}
.dot.active { width: 28px; border-radius: 4px; background: rgba(79,142,247,0.9); box-shadow: 0 0 8px rgba(79,142,247,0.4); }
.dot:hover:not(.active) { background: rgba(255,255,255,0.6); transform: scale(1.2); }

.banner-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(0,0,0,0.45); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: white; cursor: pointer; z-index: 10;
  transition: all 0.3s var(--ease-spring);
  opacity: 0;
}
.banner-carousel:hover .banner-arrow { opacity: 1; }
.banner-arrow:hover {
  background: rgba(79,142,247,0.7);
  border-color: rgba(79,142,247,0.5);
  transform: translateY(-50%) scale(1.1);
}
.banner-arrow:active { transform: translateY(-50%) scale(0.95); }
.banner-prev { left: 16px; }
.banner-next { right: 16px; }

/* 滚动指示器（Banner 底部） */
.banner-section > .scroll-indicator {
  position: absolute; bottom: 16px;
  left: 50%; transform: translateX(-50%);
  z-index: 6; display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: fadeInUp 0.8s 0.7s ease both;
}
.scroll-mouse {
  width: 26px; height: 40px; border-radius: 14px;
  border: 2px solid rgba(255,255,255,0.25);
  display: flex; justify-content: center; padding-top: 7px;
}
.scroll-wheel {
  width: 3px; height: 8px; border-radius: 2px;
  background: var(--primary-light);
  animation: scrollWheel 1.6s ease-in-out infinite;
}
@keyframes scrollWheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(14px); }
}
.scroll-hint {
  font-size: 0.7rem; color: var(--text-muted);
  letter-spacing: 0.08em; font-weight: 500;
}

/* ================================================
   Banner 下方 CTA 快捷操作行
   ================================================ */
.banner-cta-section {
  padding: 40px 0;
  background: linear-gradient(to bottom, #070A12, var(--bg-dark));
  border-bottom: 1px solid var(--border);
  animation: fadeInUp 0.6s ease both;
}
.banner-cta-row {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}
.banner-cta-row .btn-primary {
  font-size: 0.95rem;
  padding: 16px 32px;
  box-shadow: 0 4px 24px rgba(79,142,247,0.35);
}
.banner-cta-row .btn-secondary {
  font-size: 0.95rem;
  padding: 16px 32px;
}

@media (max-width: 639px) {
  .banner-cta-section { padding: 32px 0; }
  .banner-cta-row { flex-direction: column; align-items: center; }
  .banner-cta-row .btn-primary,
  .banner-cta-row .btn-secondary { width: 100%; max-width: 320px; justify-content: center; }
}

/* ================================================
   按钮通用
   ================================================ */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-sm);
  background: var(--gradient-primary); color: #fff;
  font-weight: 600; font-size: 0.95rem;
  transition: all 0.35s var(--ease-spring);
  box-shadow: 0 4px 20px rgba(79,142,247,0.3);
  position: relative; overflow: hidden;
}
.btn-primary::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 32px rgba(79,142,247,0.45);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:active { transform: translateY(-1px) scale(0.98); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04); color: var(--text-primary);
  font-weight: 600; font-size: 0.95rem;
  border: 1px solid var(--border-light);
  transition: all 0.35s var(--ease-spring);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-3px);
  border-color: rgba(79,142,247,0.4);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.btn-secondary:active { transform: translateY(-1px); }

/* ================================================
   区块通用标题
   ================================================ */
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--primary-light); margin-bottom: 10px;
  padding: 4px 14px; border-radius: 100px;
  background: rgba(79,142,247,0.08); border: 1px solid rgba(79,142,247,0.15);
}
.section-title {
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 10px;
}
.section-desc { font-size: 0.95rem; color: var(--text-secondary); }

/* ================================================
   关于我们
   ================================================ */
.about-section { background: var(--bg-dark); }
.about-grid {
  display: grid; grid-template-columns: 1fr; gap: 16px;
}
.about-card {
  padding: 28px 24px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: all 0.4s var(--ease-out);
  cursor: default;
  position: relative; overflow: hidden;
}
.about-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.about-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(79,142,247,0.25);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3), 0 0 30px rgba(79,142,247,0.06);
}
.about-card:hover::before { transform: scaleX(1); }

.about-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(79,142,247,0.08); display: flex;
  align-items: center; justify-content: center;
  color: var(--primary-light); margin-bottom: 16px;
  transition: all 0.4s var(--ease-spring);
}
.about-card:hover .about-icon {
  background: rgba(79,142,247,0.18);
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 4px 16px rgba(79,142,247,0.2);
}
.about-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; transition: color 0.3s; }
.about-card:hover h3 { color: var(--primary-light); }
.about-card p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.75; }

/* ================================================
   服务体系
   ================================================ */
.services-section { background: #0D1220; }
.services-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.service-card {
  padding: 26px 22px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  position: relative; overflow: hidden; transition: all 0.4s var(--ease-out);
  cursor: default;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.service-card::after {
  content: ''; position: absolute; top: -50%; right: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(79,142,247,0.06), transparent 60%);
  opacity: 0; transition: opacity 0.4s;
}
.service-card:hover { transform: translateY(-6px); border-color: rgba(79,142,247,0.3); }
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover::after { opacity: 1; }
.service-card:hover {
  box-shadow: 0 20px 60px rgba(0,0,0,0.35), 0 0 40px rgba(79,142,247,0.08);
}
.service-num {
  font-size: 0.68rem; font-weight: 900; font-family: 'Inter', sans-serif;
  color: rgba(79,142,247,0.25); letter-spacing: 0.08em;
  margin-bottom: 6px; transition: all 0.3s;
}
.service-card:hover .service-num { color: rgba(79,142,247,0.6); }
.service-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(79,142,247,0.07); border: 1px solid rgba(79,142,247,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light); margin-bottom: 14px;
  transition: all 0.4s var(--ease-spring);
}
.service-card:hover .service-icon {
  background: rgba(79,142,247,0.15);
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 4px 16px rgba(79,142,247,0.2);
}
.service-card h3 {
  font-size: 0.98rem; font-weight: 700; margin-bottom: 10px;
  line-height: 1.4; transition: color 0.3s;
}
.service-card:hover h3 { color: var(--primary-light); }
.service-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 14px; }
.service-tag {
  display: inline-block; padding: 4px 12px; border-radius: 100px;
  background: rgba(79,142,247,0.08); border: 1px solid rgba(79,142,247,0.12);
  font-size: 0.7rem; font-weight: 600; color: var(--primary-light);
  letter-spacing: 0.05em; transition: all 0.3s;
}
.service-card:hover .service-tag {
  background: rgba(79,142,247,0.15);
  border-color: rgba(79,142,247,0.25);
}

/* ================================================
   定价方案
   ================================================ */
.pricing-section { background: var(--bg-dark); }
.pricing-grid { display: grid; grid-template-columns: 1fr; gap: 16px; margin-bottom: 28px; }
.pricing-card {
  padding: 30px 26px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  position: relative; overflow: hidden; transition: all 0.4s var(--ease-out);
  cursor: default;
}
.pricing-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.pricing-featured {
  background: linear-gradient(145deg, rgba(45,91,227,0.12), rgba(79,142,247,0.04));
  border-color: rgba(79,142,247,0.28);
}
.pricing-featured:hover {
  border-color: rgba(79,142,247,0.5);
  box-shadow: 0 20px 60px rgba(79,142,247,0.15);
}
.pricing-badge {
  position: absolute; top: -1px; right: 24px;
  padding: 6px 16px; border-radius: 0 0 12px 12px;
  background: var(--gradient-primary); color: #fff;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em;
  transition: all 0.3s;
}
.pricing-card:hover .pricing-badge { padding-top: 8px; }
.pricing-tier {
  display: block; font-size: 1.35rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 6px;
}
.pricing-desc { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 22px; }
.pricing-features { margin-bottom: 26px; }
.pricing-feature {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.85rem; color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: color 0.25s, transform 0.25s;
}
.pricing-feature:last-child { border-bottom: none; }
.pricing-featured .pricing-feature { color: var(--text-primary); }
.pricing-card:hover .pricing-feature:hover { color: var(--primary-light); transform: translateX(4px); }
.pricing-btn {
  display: block; text-align: center; padding: 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-weight: 600; font-size: 0.88rem; color: var(--text-primary);
  transition: all 0.35s var(--ease-spring);
  cursor: pointer;
}
.pricing-btn:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.pricing-btn:active { transform: translateY(0); }
.pricing-btn-primary {
  background: var(--gradient-primary); border: none;
  box-shadow: 0 4px 20px rgba(79,142,247,0.25);
}
.pricing-btn-primary:hover {
  opacity: 0.9; transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 32px rgba(79,142,247,0.4);
}
.pricing-note {
  text-align: center; font-size: 0.8rem; color: var(--text-muted);
  padding: 14px 20px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02); border: 1px solid var(--border);
}

/* ================================================
   行业方案
   ================================================ */
.industries-section { background: #0D1220; }
.industries-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.industry-card {
  padding: 26px 22px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  position: relative; overflow: hidden; transition: all 0.4s var(--ease-out);
  cursor: default;
}
.industry-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 2px; background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.industry-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.industry-card:hover::after { transform: scaleX(1); }
.industry-icon {
  width: 54px; height: 54px; border-radius: 14px;
  background: rgba(79,142,247,0.07); border: 1px solid rgba(79,142,247,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light); margin-bottom: 14px;
  transition: all 0.4s var(--ease-spring);
}
.industry-card:hover .industry-icon {
  background: rgba(79,142,247,0.15);
  transform: scale(1.1) rotate(-3deg);
}
.industry-card h3 { font-size: 0.98rem; font-weight: 700; margin-bottom: 10px; line-height: 1.4; transition: color 0.3s; }
.industry-card:hover h3 { color: var(--primary-light); }
.industry-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 14px; }
.industry-tag {
  display: inline-block; padding: 4px 12px; border-radius: 100px;
  background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.15);
  font-size: 0.7rem; font-weight: 600; color: var(--accent); letter-spacing: 0.05em;
  transition: all 0.3s;
}
.industry-card:hover .industry-tag {
  background: rgba(245,158,11,0.15);
  border-color: rgba(245,158,11,0.3);
}

/* ================================================
   售后保障
   ================================================ */
.guarantee-section { background: var(--bg-dark); }
.guarantee-list { display: grid; grid-template-columns: 1fr; gap: 14px; }
.guarantee-item {
  display: flex; gap: 18px; padding: 22px;
  border-radius: var(--radius); background: var(--bg-card);
  border: 1px solid var(--border); transition: all 0.4s var(--ease-out);
  cursor: default;
}
.guarantee-item:hover {
  border-color: rgba(79,142,247,0.2);
  transform: translateX(6px);
  box-shadow: -4px 0 24px rgba(79,142,247,0.05);
}
.guarantee-num {
  font-size: 0.68rem; font-weight: 900; font-family: 'Inter', sans-serif;
  color: rgba(79,142,247,0.25); letter-spacing: 0.08em;
  white-space: nowrap; padding-top: 2px; min-width: 28px;
  transition: color 0.3s;
}
.guarantee-item:hover .guarantee-num { color: rgba(79,142,247,0.5); }
.guarantee-content h4 { font-size: 0.93rem; font-weight: 700; margin-bottom: 8px; transition: color 0.3s; }
.guarantee-item:hover h4 { color: var(--primary-light); }
.guarantee-content p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.75; }

/* ================================================
   资质认证
   ================================================ */
.credentials-section { background: #0D1220; }
.credentials-grid { display: grid; grid-template-columns: 1fr; gap: 14px; margin-bottom: 28px; }
.credential-card {
  padding: 26px 22px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  text-align: center; transition: all 0.4s var(--ease-out);
  cursor: default;
}
.credential-card:hover {
  transform: translateY(-6px);
  border-color: rgba(79,142,247,0.25);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3), 0 0 30px rgba(79,142,247,0.05);
}
.credential-icon {
  width: 60px; height: 60px; border-radius: 16px;
  background: rgba(79,142,247,0.07); border: 1px solid rgba(79,142,247,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light); margin: 0 auto 14px;
  transition: all 0.4s var(--ease-spring);
}
.credential-card:hover .credential-icon {
  background: rgba(79,142,247,0.15);
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 4px 16px rgba(79,142,247,0.2);
}
.credential-card h4 { font-size: 0.98rem; font-weight: 700; margin-bottom: 8px; transition: color 0.3s; }
.credential-card:hover h4 { color: var(--primary-light); }
.credential-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.75; }

.credibility-bar {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 10px; padding: 22px;
  border-radius: var(--radius); background: rgba(79,142,247,0.02);
  border: 1px solid rgba(79,142,247,0.08);
}
.credibility-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 500; color: var(--text-secondary);
  transition: color 0.3s;
}
.credibility-item:hover { color: var(--primary-light); }

/* ================================================
   FAQ
   ================================================ */
/* ================================================
   案例展示 / 上传
   ================================================ */
.showcase-section { background: #0D1220; }

/* 上传表单容器 */
.upload-form {
  border-radius: var(--radius);
  background: rgba(79,142,247,0.02);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 32px;
  transition: border-color 0.3s;
}
.upload-form:focus-within {
  border-color: rgba(79,142,247,0.25);
}

/* 标题输入行 */
.upload-title-row {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.upload-title-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all 0.3s;
  outline: none;
}
.upload-title-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,142,247,0.1);
  background: rgba(79,142,247,0.04);
}
.upload-title-input.error {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,0.1);
  animation: shake 0.4s ease;
}
.upload-title-input::placeholder {
  color: var(--text-muted);
}

/* 上传状态提示 */
.upload-status {
  text-align: center;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 20px;
  animation: fadeInUp 0.3s ease;
}
.upload-status.uploading {
  background: rgba(79,142,247,0.08);
  border: 1px solid rgba(79,142,247,0.2);
  color: var(--primary-light);
}
.upload-status.success {
  background: rgba(34,197,94,0.08);
  border: 1px solid rgba(34,197,94,0.2);
  color: #22C55E;
}
.upload-status.error {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  color: #EF4444;
}

/* 上传区域 */
.upload-zone {
  position: relative;
  border: 2px dashed var(--border-light);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  margin-bottom: 32px;
  background: rgba(79,142,247,0.02);
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--primary);
  background: rgba(79,142,247,0.06);
  box-shadow: var(--shadow-glow);
}
.upload-visual {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--text-secondary);
  pointer-events: none;
}
.upload-zone:hover .upload-visual,
.upload-zone.drag-over .upload-visual { color: var(--primary-light); }
.upload-zone .upload-visual svg { opacity: 0.5; transition: opacity 0.3s; }
.upload-zone:hover .upload-visual svg { opacity: 1; }
.upload-title { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
.upload-hint { font-size: 0.78rem; }

/* 展示网格 */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.showcase-grid:empty { display: none; }

.showcase-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.35s var(--ease-spring);
}
.showcase-item:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.showcase-item-img {
  width: 100%; height: 180px; object-fit: cover;
  display: block; background: #0A0E1A;
}
.showcase-item-info {
  padding: 8px 14px;
}
.showcase-item-title {
  font-size: 0.8rem; font-weight: 600; color: var(--text-primary);
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-all;
}
.showcase-item-file {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 40px 16px 20px;
  color: var(--text-secondary);
  transition: color 0.3s;
}
.showcase-item-file:hover { color: var(--primary-light); }
.showcase-item-file svg { opacity: 0.5; }
.showcase-item-file .file-name {
  font-size: 0.85rem; font-weight: 600; color: var(--text-primary);
  text-align: center; word-break: break-all;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.showcase-item-file .file-meta {
  font-size: 0.72rem; color: var(--text-muted);
}

/* 删除按钮 */
.showcase-delete {
  position: absolute; top: 8px; right: 8px;
  width: 28px; height: 28px; border-radius: 50%;
  background: rgba(239,68,68,0.85); border: none; color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0; transition: opacity 0.25s;
  z-index: 2;
}
.showcase-item:hover .showcase-delete { opacity: 1; }
.showcase-delete:hover { background: #EF4444; transform: scale(1.1); }
.showcase-delete:active { transform: scale(0.95); }

/* 空状态 */
.showcase-empty {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  padding: 48px 0; color: var(--text-muted); font-size: 0.9rem;
}
.showcase-empty svg { opacity: 0.3; }
.showcase-grid:not(:empty) + .showcase-empty { display: none; }

/* 响应式 */
@media (max-width: 480px) {
  .showcase-grid { grid-template-columns: 1fr; }
  .upload-zone { padding: 28px 16px; }
}
/* ===== 图片预览 Lightbox ===== */
#showcaseLightbox {
  display: none; position: fixed; inset: 0; z-index: 10000;
  align-items: center; justify-content: center;
}
#showcaseLightbox.active { display: flex; }
.sl-backdrop {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}
.sl-content {
  position: relative; max-width: 90vw; max-height: 90vh;
  z-index: 1;
}
.sl-img {
  max-width: 90vw; max-height: 85vh;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.sl-close {
  position: absolute; top: -14px; right: -14px;
  width: 36px; height: 36px; border-radius: 50%;
  background: #fff; color: #333; border: none;
  font-size: 22px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s, background 0.15s;
}
.sl-close:hover { background: #EF4444; color: #fff; transform: scale(1.1); }


.faq-section { background: var(--bg-dark); }
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border);
  overflow: hidden; transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(79,142,247,0.15); }
.faq-item.active { border-color: rgba(79,142,247,0.25); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 18px 20px; text-align: left;
  font-size: 0.9rem; font-weight: 600; color: var(--text-primary);
  transition: color 0.3s;
}
.faq-item:hover .faq-question { color: var(--primary-light); }
.faq-item.active .faq-question { color: var(--primary-light); }
.faq-icon {
  flex-shrink: 0; color: var(--text-muted);
  transition: transform 0.4s var(--ease-spring), color 0.3s;
}
.faq-item.active .faq-icon { transform: rotate(180deg); color: var(--primary); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.45s var(--ease-out), padding 0.3s;
}
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 20px 18px; font-size: 0.875rem; color: var(--text-secondary); line-height: 1.8; }

/* ================================================
   CTA 合作邀约
   ================================================ */
.cta-section { position: relative; background: var(--bg-dark); overflow: hidden; }
.cta-bg { position: absolute; inset: 0; z-index: 0; }
.cta-orb {
  position: absolute; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(45,91,227,0.1), transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  border-radius: 50%; filter: blur(60px);
  animation: heroBgPulse 4s ease-in-out infinite;
}
.cta-content {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center;
}
.cta-title {
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  font-weight: 900; letter-spacing: -0.02em; line-height: 1.2;
  margin: 10px 0 18px;
}
.cta-desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.9; margin-bottom: 28px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn-large { padding: 16px 30px; font-size: 0.98rem; }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-weight: 600; font-size: 0.92rem; color: var(--text-primary);
  transition: all 0.35s var(--ease-spring);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.06);
  transform: translateY(-3px);
  border-color: rgba(79,142,247,0.35);
  box-shadow: 0 4px 20px rgba(79,142,247,0.12);
}
.btn-outline:active { transform: translateY(-1px); }

.cta-form-wrapper { }
.cta-form {
  padding: 32px 28px; border-radius: var(--radius);
  background: rgba(17,24,39,0.95); border: 1px solid var(--border);
  backdrop-filter: blur(10px); box-shadow: var(--shadow-lg);
  transition: box-shadow 0.3s;
}
.cta-form:focus-within {
  box-shadow: 0 8px 48px rgba(79,142,247,0.1), 0 0 0 1px rgba(79,142,247,0.15);
}
.cta-form.highlight {
  box-shadow: 0 0 0 3px rgba(79,142,247,0.4), 0 8px 48px rgba(79,142,247,0.1);
  transition: box-shadow 0.3s;
}
.cta-form h3 { font-size: 1.15rem; font-weight: 800; margin-bottom: 6px; }
.form-sub { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 22px; }
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 0.8rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 7px;
  letter-spacing: 0.02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-light);
  color: var(--text-primary); font-size: 0.9rem;
  transition: all 0.3s; appearance: none; -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,142,247,0.12);
  background: rgba(79,142,247,0.04);
}
.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: #EF4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,0.12);
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px;
}
.form-group select option { background: #1a2035; color: var(--text-primary); }
.form-group textarea { resize: vertical; min-height: 76px; }
.btn-submit {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px; border-radius: var(--radius-sm);
  background: var(--gradient-primary); color: #fff;
  font-weight: 700; font-size: 0.93rem;
  transition: all 0.35s var(--ease-spring); margin-top: 6px;
  box-shadow: 0 4px 20px rgba(79,142,247,0.25);
  position: relative; overflow: hidden;
}
.btn-submit::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.btn-submit:hover {
  opacity: 0.92; transform: translateY(-3px) scale(1.01);
  box-shadow: 0 8px 32px rgba(79,142,247,0.4);
}
.btn-submit:hover::before { opacity: 1; }
.btn-submit:active { transform: translateY(-1px) scale(0.99); }
.form-note { font-size: 0.72rem; color: var(--text-muted); text-align: center; margin-top: 10px; }

/* ================================================
   弹窗
   ================================================ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; opacity: 0; visibility: hidden;
  transition: all 0.3s;
}
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal {
  background: #111827; border: 1px solid var(--border-light);
  border-radius: var(--radius); padding: 40px 36px;
  max-width: 440px; width: 100%; text-align: center;
  position: relative; transform: scale(0.9) translateY(20px);
  transition: transform 0.4s var(--ease-spring);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.show .modal { transform: scale(1) translateY(0); }
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.05); display: flex;
  align-items: center; justify-content: center;
  color: var(--text-muted); transition: all 0.3s;
}
.modal-close:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); transform: rotate(90deg); }
.modal-icon { margin-bottom: 18px; }
.modal h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 10px; }
.modal p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }
.modal strong { color: var(--primary-light); }
.modal-sub { font-size: 0.8rem !important; color: var(--text-muted) !important; margin-top: 8px; }

/* ================================================
   页脚
   ================================================ */
.footer {
  background: #070A12; border-top: 1px solid var(--border);
  padding: 56px 0 28px;
}
.footer-top {
  display: grid; grid-template-columns: 1fr; gap: 36px;
  padding-bottom: 36px; border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.footer-brand .nav-logo { margin-bottom: 14px; display: inline-flex; }
.footer-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.7; }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.footer-col h5 { font-size: 0.78rem; font-weight: 700; color: var(--text-primary); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.footer-col a {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.82rem; color: var(--text-muted); margin-bottom: 8px;
  transition: all 0.3s;
}
.footer-col a:hover { color: var(--primary-light); transform: translateX(4px); }
.footer-phone { color: var(--primary-light) !important; font-weight: 600 !important; }
.footer-phone:hover { transform: translateX(4px) !important; }
.footer-bottom { display: flex; flex-direction: column; gap: 6px; text-align: center; }
.footer-bottom p { font-size: 0.75rem; color: var(--text-muted); }
.footer-icp a {
  color: var(--text-muted); font-size: 0.75rem;
  transition: color 0.3s;
}
.footer-icp a:hover { color: var(--primary-light); }

/* ================================================
   滚动触发动画
   ================================================ */
.reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left {
  opacity: 0; transform: translateX(-32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0; transform: translateX(32px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* ================================================
   回到顶部按钮
   ================================================ */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 999;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-light); cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
  opacity: 0; transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.35s, transform 0.35s var(--ease-spring), background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.back-to-top.visible {
  opacity: 1; transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: rgba(79,142,247,0.15);
  border-color: var(--primary);
  box-shadow: 0 8px 28px rgba(79,142,247,0.25);
  transform: translateY(-4px);
}
.back-to-top:active { transform: translateY(0) scale(0.92); }

@media (max-width: 639px) {
  .back-to-top { bottom: 20px; right: 16px; width: 40px; height: 40px; }
}
@media (min-width: 640px) {
  .container { padding: 0 32px; }
  .about-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .guarantee-list { grid-template-columns: repeat(2, 1fr); }
  .credentials-grid { grid-template-columns: repeat(3, 1fr); }
  .credibility-bar { grid-template-columns: repeat(4, 1fr); }
  .footer-links { grid-template-columns: repeat(4, 1fr); }
  .banner-arrow { opacity: 1; width: 48px; height: 48px; }
}

/* ================================================
   响应式：Desktop (≥ 1024px)
   ================================================ */
@media (min-width: 1024px) {
  .section { padding: 100px 0; }
  .container { padding: 0 40px; }

  .hamburger { display: none; }
  .nav-links { display: flex; }
  .nav-phone { display: flex; }
  .nav-links a { font-size: 0.875rem; }

  .br-desktop { display: inline; }
  .banner-hero-overlay { max-width: 720px; bottom: 110px; }

  .services-grid { grid-template-columns: repeat(4, 1fr); }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .guarantee-list { grid-template-columns: repeat(2, 1fr); }
  .cta-content { grid-template-columns: 1fr 1fr; gap: 56px; }

  .footer-top { grid-template-columns: 300px 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ================================================
   响应式：Large Desktop (≥ 1280px)
   ================================================ */
@media (min-width: 1024px) {
  .banner-dots { bottom: 20px; }
}
@media (min-width: 1280px) {
  .section { padding: 110px 0; }
  .container { max-width: 1240px; }
  .banner-arrow { width: 52px; height: 52px; }
}

/* ================================================
   SEO / GEO 在线文章编辑器
   ================================================ */
.article-editor {
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  background: rgba(16, 23, 40, 0.86);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.article-editor:focus-within {
  border-color: rgba(79, 142, 247, 0.42);
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.24), 0 0 0 3px rgba(79, 142, 247, 0.06);
}
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 58px;
  padding: 9px 16px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.018);
}
.editor-toolbar button {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.editor-toolbar button:hover,
.editor-toolbar button:focus-visible {
  outline: none;
  color: var(--primary-light);
  background: rgba(79, 142, 247, 0.1);
}
.toolbar-divider {
  width: 1px;
  height: 22px;
  flex: 0 0 1px;
  margin: 0 8px;
  background: var(--border-light);
}
.editor-draft-bar {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 18px 22px 0;
  padding: 10px 12px;
  border-radius: 7px;
  background: rgba(79, 142, 247, 0.055);
  color: var(--text-secondary);
  font-size: 0.78rem;
}
.draft-badge {
  flex: 0 0 auto;
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--primary-light);
  background: rgba(79, 142, 247, 0.14);
  font-size: 0.72rem;
}
.editor-canvas { padding: 10px 22px 0; }
.editor-title {
  width: 100%;
  padding: 20px 0 18px;
  border: 0;
  border-bottom: 1px solid var(--border);
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-family: inherit;
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  font-weight: 700;
}
.editor-title::placeholder { color: var(--text-muted); }
.editor-body {
  min-height: 280px;
  padding: 20px 0 30px;
  outline: none;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.9;
  white-space: pre-wrap;
}
.editor-body:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted);
  pointer-events: none;
}
.editor-body h2 { margin: 1.2em 0 0.55em; color: var(--text-primary); font-size: 1.25rem; }
.editor-body ul, .editor-body ol { padding-left: 1.6em; }
.editor-body a { color: var(--primary-light); text-decoration: underline; }
.editor-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.012);
}
.editor-count { color: var(--text-muted); font-size: 0.76rem; }
.editor-count b { color: var(--text-secondary); font-weight: 500; }
.editor-submit {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 11px 19px;
  border: 0;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(79, 142, 247, 0.2);
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}
.editor-submit:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(79, 142, 247, 0.3); }
.editor-submit:disabled { opacity: 0.55; cursor: wait; transform: none; }
.showcase-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 30px 0 16px;
}
.showcase-list-head h3 { margin: 0; color: var(--text-primary); font-size: 1rem; }
.showcase-list-head span { color: var(--text-muted); font-size: 0.75rem; }
@media (max-width: 640px) {
  .editor-toolbar { padding: 8px 10px; }
  .editor-draft-bar { margin: 14px 14px 0; align-items: flex-start; }
  .editor-canvas { padding-inline: 16px; }
  .editor-body { min-height: 230px; }
  .editor-footer { padding: 12px 14px; }
}
/* 数据库文章列表 */
.article-card {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 92px;
  padding: 18px;
}
.article-card-icon {
  width: 46px; height: 46px; flex: 0 0 46px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: rgba(79,142,247,0.1);
  color: var(--primary-light);
  font-weight: 700;
}
.article-card-content { min-width: 0; padding-right: 38px; }
.article-card-content h4 {
  margin: 0 0 7px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--text-primary); font-size: 0.92rem;
}
.article-card-content p { margin: 0; color: var(--text-muted); font-size: 0.72rem; }
.article-status {
  position: absolute; right: 13px; bottom: 11px;
  color: #22c55e; font-size: 0.68rem;
}
@media (hover: none) {
  .article-card .showcase-delete { opacity: 1; }
}
/* 文章操作提示与详情弹窗 */
.article-toast {
  position: fixed; top: 92px; right: 24px; z-index: 12000;
  max-width: min(380px, calc(100vw - 32px));
  padding: 13px 18px; border: 1px solid var(--border-light); border-radius: 10px;
  background: rgba(16,23,40,.96); color: var(--text-primary);
  box-shadow: 0 16px 40px rgba(0,0,0,.35);
  opacity: 0; transform: translateY(-12px); pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.article-toast.visible { opacity: 1; transform: translateY(0); }
.article-toast.success { border-color: rgba(34,197,94,.4); color: #4ade80; }
.article-toast.error { border-color: rgba(239,68,68,.4); color: #f87171; }
.article-toast.uploading { border-color: rgba(79,142,247,.4); color: var(--primary-light); }
.article-card { cursor: pointer; }
.article-card:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.article-detail-modal { display: none; position: fixed; inset: 0; z-index: 11000; padding: 36px 20px; }
.article-detail-modal.active { display: flex; align-items: center; justify-content: center; }
.article-detail-backdrop { position: absolute; inset: 0; background: rgba(2,6,15,.82); backdrop-filter: blur(7px); }
.article-detail-panel {
  position: relative; z-index: 1; width: min(820px, 100%); max-height: calc(100vh - 72px);
  overflow-y: auto; padding: 38px 42px 48px;
  border: 1px solid var(--border-light); border-radius: var(--radius);
  background: #101728; box-shadow: 0 28px 80px rgba(0,0,0,.55);
}
.article-detail-close {
  position: absolute; top: 14px; right: 16px; width: 36px; height: 36px;
  border: 0; border-radius: 50%; background: rgba(255,255,255,.06);
  color: var(--text-secondary); font-size: 1.5rem; cursor: pointer;
}
.article-detail-close:hover { background: rgba(255,255,255,.1); color: #fff; }
.article-detail-meta { margin-bottom: 10px; color: var(--primary-light); font-size: .76rem; }
.article-detail-panel h2 { margin: 0 45px 24px 0; color: var(--text-primary); font-size: clamp(1.4rem,3vw,2rem); line-height: 1.35; }
.article-detail-body { padding-top: 22px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: .98rem; line-height: 1.9; word-break: break-word; }
.article-detail-body h1,.article-detail-body h2,.article-detail-body h3 { color: var(--text-primary); line-height: 1.5; }
.article-detail-body a { color: var(--primary-light); text-decoration: underline; }
.article-detail-body ul,.article-detail-body ol { padding-left: 1.5em; }
@media (max-width: 640px) {
  .article-toast { top: 82px; right: 16px; left: 16px; max-width: none; }
  .article-detail-modal { padding: 16px; }
  .article-detail-panel { max-height: calc(100vh - 32px); padding: 32px 22px 38px; }
}