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

:root {
  --primary: #f97316;
  --primary-dark: #ea580c;
  --primary-light: #fff7ed;
  --dark: #1f2937;
  --text: #374151;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg-light: #f9fafb;
  --gradient: linear-gradient(135deg, #f97316, #f43f5e);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: #fff;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--dark);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--gradient);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--dark);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  text-align: center;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 13px;
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--dark);
  border-color: var(--border);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Hero */
.hero {
  padding: 72px 0;
  background: radial-gradient(ellipse 80% 60% at 80% 10%, #fff7ed 0%, #fff 55%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  align-items: center;
  gap: 48px;
}

.hero-title {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--dark);
}

.hero-title br {
  display: none;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.hero-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-ring {
  position: relative;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 24px 60px rgba(249, 115, 22, 0.35);
}

.icon-emoji {
  font-size: 110px;
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.2));
}

.icon-ring .sub {
  position: absolute;
  top: 16px;
  right: 12px;
  font-size: 46px;
  background: #fff;
  border-radius: 50%;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.icon-ring .sub2 {
  position: absolute;
  bottom: 18px;
  left: 4px;
  font-size: 40px;
  background: #fff;
  border-radius: 50%;
  width: 58px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* Sections */
.section-title {
  font-size: 32px;
  font-weight: 800;
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--dark);
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 44px;
}

/* Services */
.services {
  padding: 80px 0;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.service-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  transition: all 0.25s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(31, 41, 55, 0.08);
  border-color: #fed7aa;
}

.service-icon {
  font-size: 34px;
  margin-bottom: 14px;
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--dark);
}

.service-card p {
  color: var(--text-muted);
  font-size: 14px;
}

/* Advantage */
.advantage {
  padding: 80px 0;
  background: var(--bg-light);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.advantage-card {
  padding: 32px 20px;
  text-align: center;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
}

.adv-num {
  font-size: 40px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.adv-label {
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.adv-label + p {
  font-size: 13px;
  color: var(--text-muted);
}

/* Cases */
.cases {
  padding: 80px 0;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.case-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  transition: all 0.25s;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(31, 41, 55, 0.1);
}

.case-banner {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
}

.banner-taobao {
  background: linear-gradient(135deg, #ff6b6b, #f43f5e);
}

.banner-pdd {
  background: linear-gradient(135deg, #22c55e, #10b981);
}

.banner-douyin {
  background: linear-gradient(135deg, #111827, #1e293b);
}

.case-card h3 {
  font-size: 18px;
  color: var(--dark);
  padding: 20px 24px 4px;
}

.case-card p {
  font-size: 14px;
  color: var(--text-muted);
  padding: 0 24px 24px;
}

/* Pricing */
.pricing {
  padding: 80px 0;
  background: var(--bg-light);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: 0 16px 40px rgba(249, 115, 22, 0.15);
}

.tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
}

.pricing-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--dark);
}

.price {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}

.pricing-card li {
  padding: 6px 0;
  font-size: 14px;
}

.pricing-card li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
  margin-right: 8px;
}

/* Testimonials */
.testimonials {
  padding: 80px 0;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.testimonial-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
}

.quote {
  font-size: 15px;
  margin-bottom: 20px;
}

.person {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #fff;
  font-weight: 600;
}

.avatar-f {
  background: linear-gradient(135deg, #f43f5e, #fb7185);
}

.avatar-m {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.person small {
  color: var(--text-muted);
}

/* Contact */
.contact {
  padding: 80px 0;
  background: var(--bg-light);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: start;
}

.contact-info h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 8px;
}

.contact-sub {
  color: var(--text-muted);
  margin-bottom: 28px;
}

.contact-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  margin-bottom: 20px;
}

.contact-block h3 {
  font-size: 17px;
  color: var(--dark);
  margin-bottom: 8px;
}

.contact-block p {
  font-size: 14px;
  color: var(--text-muted);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 12px;
}

.ci-icon {
  font-size: 26px;
}

.contact-item small {
  display: block;
  color: var(--text-muted);
  font-size: 12px;
}

.contact-item strong {
  color: var(--dark);
  font-size: 16px;
}

.contact-item .btn {
  margin-left: auto;
}

.contact-note {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 16px 40px rgba(31, 41, 55, 0.08);
  text-align: center;
}

.note-icon {
  font-size: 44px;
  display: block;
  margin-bottom: 14px;
}

.contact-note h3 {
  font-size: 20px;
  color: var(--dark);
  margin-bottom: 10px;
}

.contact-note p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 22px;
}

/* Footer */
.footer {
  background: #111827;
  color: #9ca3af;
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
}

.footer .brand-name {
  color: #fff;
  font-size: 18px;
}

.footer-brand p {
  font-size: 14px;
  margin-top: 10px;
  max-width: 260px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: #9ca3af;
  text-decoration: none;
  font-size: 14px;
  padding: 4px 0;
}

.footer-col a:hover {
  color: #fff;
}

.footer-col p {
  font-size: 14px;
  padding: 4px 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 24px;
  text-align: center;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.friendlink a {
  color: #f97316;
  text-decoration: none;
}

.friendlink a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-title br { display: inline; }
  .hero-actions { justify-content: center; }
  .service-grid, .case-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .service-grid, .case-grid, .pricing-grid, .testimonial-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 34px; }
  .icon-ring { width: 200px; height: 200px; }
  .icon-emoji { font-size: 76px; }
}