/* ============================================================
   QianNuo Agency - Global Styles (简约大气版)
   ============================================================ */

/* ── 1. CSS Variables ── */
:root {
  /* Brand colors */
  --c-primary: #0a1628;
  --c-accent: #3b82f6;
  --c-accent-light: #60a5fa;
  --c-text: #0a1628;
  --c-text-2: #64748b;
  --c-text-3: #94a3b8;
  --c-bg: #ffffff;
  --c-surface: #f8fafc;
  --c-surface-2: #f1f5f9;
  --c-border: #e2e8f0;

  /* Background gradients */
  --gradient-hero: linear-gradient(180deg, #fafbfc 0%, #ffffff 100%);
  --gradient-section: linear-gradient(180deg, #ffffff 0%, #f8fafc 50%, #ffffff 100%);
  --gradient-dark: linear-gradient(135deg, #0a1628 0%, #1e293b 100%);

  /* Typography */
  --font-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --font-en: 'Inter', -apple-system, sans-serif;

  /* Spacing */
  --section-py: 120px;
  --container-max: 1200px;

  /* Transitions */
  --t-base: 0.3s ease;
}

/* ── 2. Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-zh);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

h1,h2,h3,h4 { font-family: var(--font-en); font-weight: 700; line-height: 1.2; }

/* ── 3. Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

section { padding: var(--section-py) 0; }

/* ── 4. Typography ── */
.section-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 17px;
  color: var(--c-text-2);
  max-width: 600px;
  line-height: 1.8;
}

.section-header {
  text-align: center;
  margin-bottom: 72px;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ── 5. Navigation ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 收缩后的导航栏 */
nav.nav-compact {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.4s ease;
}

nav.nav-compact .nav-inner {
  height: 64px;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-2);
  border-radius: 8px;
  transition: all var(--t-base);
}

.nav-links a:hover,
.nav-links a.current {
  color: var(--c-text);
  background: var(--c-surface);
}

.nav-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  transition: all 0.4s ease;
}

.nav-logo-img {
  height: 36px;
  width: auto;
  transition: all 0.4s ease;
}

.nav-logo-icon {
  display: none;
  transition: all 0.4s ease;
}

/* 收缩后只显示BM方块 */
nav.nav-compact .nav-logo-img {
  display: none;
}

nav.nav-compact .nav-logo-icon {
  display: block;
  width: 36px;
  height: 36px;
}

.nav-cta {
  padding: 10px 24px;
  background: transparent;
  color: #0a1628 !important;
  border-radius: 8px;
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 600;
  transition: all 0.4s ease;
}

.nav-cta:hover {
  background: rgba(0, 82, 220, 0.1);
  color: #0052dc !important;
}

/* 首页时按钮位置 */
.nav-cta-left {
  opacity: 1;
  transform: translateX(0);
}

.nav-cta-right {
  opacity: 1;
  transform: translateX(0);
}

/* 收缩后按钮往中间靠，保持原来左右位置 */
nav.nav-compact .nav-cta-left {
  transform: translateX(200px);
}

nav.nav-compact .nav-cta-right {
  transform: translateX(-200px);
}

nav.nav-compact .nav-cta {
  padding: 8px 20px;
}

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  padding: 20px;
  border-top: 1px solid var(--c-border);
  z-index: 999;
}

.mobile-menu.open { display: flex; flex-direction: column; gap: 4px; }

.mobile-menu a {
  display: block;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
  border-radius: 8px;
}

.mobile-menu a:hover { background: var(--c-surface); }

.mobile-menu .mobile-cta {
  margin-top: 8px;
  background: var(--c-text);
  color: #fff !important;
  text-align: center;
}

/* ── 6. Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 50%, #e8eeff 100%);
  padding-top: 72px;
  overflow: hidden;
}

/* Hero Background */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

/* Gradient Background */
.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 100% 60% at 30% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse 80% 50% at 80% 30%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
    radial-gradient(ellipse 60% 40% at 60% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 40%);
}

/* Hero Grid */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 20%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 20%, black 0%, transparent 75%);
  z-index: 1;
}

/* Glow Effects */
.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 700px;
  background:
    radial-gradient(ellipse 60% 50% at 30% 20%, rgba(99, 102, 241, 0.15) 0%, rgba(59, 130, 246, 0.08) 30%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 70% 40%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
  pointer-events: none;
  animation: glow-pulse 6s ease-in-out infinite;
  z-index: 1;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.8; transform: translateX(-50%) scale(1.08); }
}

/* Geometric decorations */
.hero-geo {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(99, 102, 241, 0.12);
  pointer-events: none;
  z-index: 1;
}

.hero-geo-1 {
  width: 500px;
  height: 500px;
  top: 5%;
  right: -150px;
  animation: float 18s ease-in-out infinite;
}

.hero-geo-2 {
  width: 350px;
  height: 350px;
  bottom: 10%;
  left: -100px;
  animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(4deg); }
}

/* Floating orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.hero-orb-1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -200px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, rgba(168, 85, 247, 0.05) 40%, transparent 70%);
  animation: orb-float 22s ease-in-out infinite;
}

.hero-orb-2 {
  width: 450px;
  height: 450px;
  bottom: -120px;
  left: -120px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, rgba(99, 102, 241, 0.04) 40%, transparent 70%);
  animation: orb-float 20s ease-in-out infinite reverse;
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(25px, -35px); }
}

/* Particles */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.particle-dot {
  position: absolute;
  width: 5px;
  height: 5px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.8), rgba(168, 85, 247, 0.6));
  border-radius: 50%;
  opacity: 0.4;
  animation: particle-float 18s linear infinite;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.3);
}

.particle-dot:nth-child(odd) {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(99, 102, 241, 0.6));
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.3);
}

@keyframes particle-float {
  0% { transform: translateY(100vh); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-80px); opacity: 0; }
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 40px 80px;
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

/* Hero Content */
.hero-content {
  margin-bottom: 56px;
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
  margin-bottom: 32px;
  letter-spacing: 0.5px;
}

.badge-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--c-accent);
  border-radius: 6px;
  color: #fff;
}

/* Hero Title */
.hero-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-title-line {
  font-size: clamp(44px, 9vw, 80px);
  font-weight: 800;
  line-height: 1.05;
  color: var(--c-text);
  letter-spacing: -2px;
  display: block;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--c-accent) 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Description */
.hero-desc {
  font-size: 17px;
  color: var(--c-text-2);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Tags */
.hero-tags {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-tag {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-2);
  padding: 8px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  transition: all 0.3s ease;
}

.hero-tag:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-2px);
}

.hero-tag-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
}

.hero-tag-unit {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent);
}

/* Hero Actions */
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 12px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-arrow {
  transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--c-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: #2563eb;
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.btn-outline {
  background: #fff;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}

.btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-3px);
}

/* Hero Stats Row */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 36px 40px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
}

.hero-stat-item {
  text-align: center;
  padding: 12px;
  position: relative;
}

.hero-stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 50%;
  background: var(--c-border);
}

.hero-stat-num {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin-bottom: 6px;
}

.hero-stat-num .hs-num {
  font-family: var(--font-en);
  font-size: 42px;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1;
  letter-spacing: -2px;
}

.hero-stat-num .hs-unit {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-accent);
}

.hero-stat-label {
  font-size: 12px;
  color: var(--c-text-3);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Hero Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--c-text-3);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  z-index: 3;
}

.hero-scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(180deg, var(--c-accent), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.6); opacity: 0.5; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--t-base);
}

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

.btn-primary:hover {
  background: var(--c-accent);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}

.btn-outline:hover {
  border-color: var(--c-text);
  background: var(--c-text);
  color: #fff;
}

/* Hero Stats - Legacy */
.hero-stats {
  display: none;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hs-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
}

.hs-unit {
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text-2);
}

.hs-label {
  font-size: 12px;
  color: var(--c-text-3);
  font-weight: 500;
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-stat-div {
  width: 1px;
  height: 48px;
  background: var(--c-border);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--t-base);
}

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

.btn-primary:hover {
  background: var(--c-accent);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}

.btn-outline:hover {
  border-color: var(--c-text);
}

/* Hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding: 32px 48px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--c-border);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hs-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
}

.hs-unit {
  font-size: 20px;
  font-weight: 600;
  color: var(--c-text-2);
}

.hs-label {
  font-size: 12px;
  color: var(--c-text-3);
  font-weight: 500;
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-stat-div {
  width: 1px;
  height: 48px;
  background: var(--c-border);
}

/* ── 7. Trust Bar ── */
.trust-bar {
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.9) 0%, rgba(241, 245, 249, 0.95) 100%);
  border-bottom: 1px solid rgba(59, 130, 246, 0.08);
  padding: 20px 0;
  position: relative;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.trust-label {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  color: var(--c-text-3);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.trust-logos {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-2);
}

.cert-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-2);
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 6px;
}

/* ── 8. Footer ── */
.site-footer {
  background: var(--c-text);
  color: rgba(255,255,255,0.6);
}

.footer-main { padding: 40px 0; }

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}

.footer-brand {
  flex: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 120px;
}

.footer-links {
  flex: 0.6;
  display: flex;
  flex-direction: column;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.fl-info {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.fl-name {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.fl-en {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 2px;
  line-height: 1.4;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  margin: auto 0;
}

.footer-socials { display: flex; gap: 12px; }

.fs-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
  transition: all var(--t-base);
}

.fs-link:hover { background: var(--c-accent); color: #fff; }

.footer-links h4 {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 16px 0;
  padding: 0;
  letter-spacing: 0;
  line-height: 1.3;
  text-transform: none;
}

.footer-links ul { display: flex; flex-direction: column; gap: 12px; }

.footer-links li,
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
}

.fb-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 16px;
}

.fb-certs { display: flex; gap: 24px; }

.fc {
  font-family: var(--font-en);
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ── 9. Scroll Animations ── */
.anim-target {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.anim-target.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 10. Responsive ── */
@media (max-width: 1100px) {
  .footer-grid { flex-wrap: wrap; }
  .footer-brand { flex: 1 1 100%; margin-bottom: 24px; }
  .footer-links { flex: 1; }
}

@media (max-width: 900px) {
  .container { padding: 0 32px; }

  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }

  .hero-inner { padding: 50px 24px 60px; }
  .hero-content { margin-bottom: 40px; }
  .hero-tags { gap: 10px; }
  .hero-tag { font-size: 12px; padding: 6px 12px; }
  .hero-tag-num { font-size: 16px; }

  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    padding: 24px;
  }
  .hero-stat-item:nth-child(2)::after { display: none; }
  .hero-stat-num .hs-num { font-size: 36px; }
  .hero-stat-num .hs-unit { font-size: 18px; }
  .hero-stat-label { font-size: 10px; }

  .hero-scroll { display: none; }

  section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }

  .footer-grid { flex-wrap: wrap; gap: 32px; }
  .footer-brand { flex: 1 1 100%; margin-bottom: 16px; }
  .footer-links { flex: 0 0 auto; }
  .trust-inner { gap: 24px; }
}

@media (max-width: 600px) {
  .container { padding: 0 20px; }
  .nav-inner { 
    padding: 0 !important; 
    position: relative !important;
  }

  .nav-links { display: none !important; }
  .nav-cta { display: none !important; }
  
  .nav-logo {
    position: absolute !important;
    left: 50% !important;
    top: 50% !important;
    transform: translate(-50%, -50%) !important;
  }
  
  .nav-logo-img { height: 30px !important; width: auto !important; }
  .nav-logo-icon { width: 30px !important; height: 30px !important; }
  
  .mobile-menu-btn {
    position: absolute !important;
    left: 12px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
  }

  .hero-inner { padding: 40px 16px 50px; }
  .hero-title-line {
    font-size: 36px;
    letter-spacing: -1px;
  }
  .hero-desc { font-size: 15px; }
  .hero-badge { font-size: 12px; padding: 8px 14px; }

  .hero-actions { gap: 12px; }
  .btn { padding: 14px 20px; font-size: 14px; }

  .hero-stats-row {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 20px;
    border-radius: 16px;
  }
  .hero-stat-item { padding: 12px; }
  .hero-stat-num .hs-num { font-size: 28px; }
  .hero-stat-num .hs-unit { font-size: 16px; }
  .hero-stat-label { font-size: 9px; }

  .footer-grid { flex-direction: column; gap: 24px; }
  .footer-brand { flex: 1 1 auto; }
  .footer-links { flex: 1 1 auto; }
  .fb-inner { flex-direction: column; text-align: center; }
  .footer-main { padding: 48px 0; }
}

/* ========== 手机端适配 (480px以下) ========== */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  
  /* 导航 */
  .nav-logo img { width: 80px; }
  .mobile-menu-btn { padding: 8px; }
  
  /* 英雄区 */
  .hero-inner { padding: 30px 12px 40px; }
  .hero-title-line { font-size: 28px !important; line-height: 1.3; }
  .hero-title-highlight { font-size: 20px !important; }
  .hero-desc { font-size: 14px; line-height: 1.6; }
  .hero-badge { font-size: 11px; padding: 6px 12px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .btn { width: 100%; justify-content: center; padding: 14px 20px; }
  
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    padding: 16px;
    border-radius: 12px;
  }
  .hero-stat-item { padding: 8px; }
  .hero-stat-num .hs-num { font-size: 22px; }
  .hero-stat-num .hs-unit { font-size: 14px; }
  .hero-stat-label { font-size: 8px; }
  
  /* 通用区块 */
  section { padding: 50px 0; }
  .section-title { font-size: 22px !important; line-height: 1.4; }
  .section-desc { font-size: 14px; line-height: 1.6; }
  .section-header { margin-bottom: 32px; }
  
  /* 服务区块 */
  .services-grid { grid-template-columns: 1fr !important; gap: 16px; }
  .service-card { padding: 20px 16px; }
  .service-card h3 { font-size: 18px; }
  .service-card p { font-size: 13px; }
  
  /* 优势区块 */
  .advantages-section { padding: 50px 0; }
  .advantages-grid { grid-template-columns: 1fr !important; gap: 14px; }
  .advantage-card { padding: 20px 16px; }
  .advantage-card h3 { font-size: 18px; }
  .advantage-card p { font-size: 13px; }
  .adv-icon { width: 56px; height: 56px; }
  
  /* 数据统计 */
  .stats-banner { padding: 40px 0; }
  .stats-banner-inner { flex-wrap: wrap; justify-content: center; }
  .sb-item { flex: 0 0 50%; padding: 16px 0; }
  .sb-div { display: none; }
  .sb-num { font-size: 28px; }
  .sb-label { font-size: 12px; }
  
  /* 关于区块 */
  .about-section { padding: 50px 0; }
  .about-grid { grid-template-columns: 1fr !important; gap: 30px; }
  .about-content { padding: 0; }
  .about-content h2 { font-size: 24px; }
  .about-content p { font-size: 14px; line-height: 1.7; }
  .about-stats { flex-direction: column; gap: 16px; }
  .ast-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 14px; }
  .ast-card { padding: 20px 14px; }
  .ast-num { font-size: 28px; }
  .ast-label { font-size: 13px; }
  .ast-desc { font-size: 11px; }
  .ast-icon svg { width: 28px; height: 28px; }
  
  /* 联系表单 */
  .contact-section { padding: 50px 0; overflow: hidden; }
  .contact-wrapper { flex-direction: column !important; gap: 30px; }
  .contact-info { padding: 24px; width: 100%; box-sizing: border-box; }
  .contact-info h2 { font-size: 22px; }
  .contact-info p { font-size: 13px; }
  .contact-form { padding: 24px; width: 100%; box-sizing: border-box; }
  .form-row { flex-direction: column !important; }
  .form-group input, .form-group select, .form-group textarea { padding: 12px 14px; font-size: 14px; width: 100%; box-sizing: border-box; }
  
  /* 悬浮二维码 */
  .floating-qr { right: 10px !important; bottom: 70px !important; }
  .fq-content { min-width: 120px; padding: 10px; }
  .fq-qr { width: 90px; height: 90px; }
  .fq-title { font-size: 11px; }
  .fq-desc { font-size: 10px; }
  
  /* 页脚 */
  .footer-main { padding: 40px 0; }
  .footer-logo img { width: 40px; }
  .fl-name { font-size: 18px; }
  .footer-desc { font-size: 13px; line-height: 1.6; }
  .footer-links ul { gap: 10px; }
  .footer-links li, .footer-links a { font-size: 13px; }
  .fb-inner span { font-size: 12px; }
  
  /* Footer手机适配 */
  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  
  .footer-brand {
    width: 100%;
    flex: none;
  }
  
  .footer-links {
    width: 100%;
    flex: none;
  }
  
  .footer-logo {
    margin-bottom: 16px;
  }
}

/* 手机端导航栏修复 */
@media (max-width: 480px) {
  nav { height: 56px !important; }
  
  .nav-inner {
    position: relative !important;
    padding: 0 12px !important;
    height: 56px !important;
  }
  
  .nav-links { display: none !important; }
  .nav-cta { display: none !important; }
  
  .nav-logo {
    position: absolute !important;
    left: 50% !important;
    top: 50% !important;
    transform: translate(-50%, -50%) !important;
  }
  
  .nav-logo-img { height: 28px !important; width: auto !important; }
  .nav-logo-icon { width: 28px !important; height: 28px !important; }
  
  .mobile-menu-btn {
    position: absolute !important;
    left: 12px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
  }
  
  nav.nav-compact .nav-logo-img { height: 24px !important; }
  nav.nav-compact .nav-logo-icon { width: 24px !important; height: 24px !important; }
}

/* 横屏模式适配 */
@media (max-height: 500px) and (orientation: landscape) {
  nav {
    height: 48px !important;
  }
  
  .nav-inner {
    height: 48px !important;
    padding: 0 12px !important;
  }
  
  .nav-logo-img {
    height: 24px !important;
  }
  
  .nav-links {
    display: none !important;
  }
  
  .nav-links a {
    padding: 4px 8px;
    font-size: 11px;
  }
  
  .nav-cta {
    padding: 6px 10px !important;
    font-size: 11px !important;
  }
}