/* ==========================================================================
   CuteCloud (最萌の云) - Cloud Candy Design System
   Domain: cutecloud.wiki
   Palette: Milky White, Sky Blue & Candy Pastel Accents
   ========================================================================== */

:root {
  /* Cloud Candy Color Palette */
  --color-milky-bg: #F8FAFD;
  --color-milky-card: rgba(255, 255, 255, 0.94);
  --color-milky-pure: #FFFFFF;
  --color-sky-blue: #0070FF;
  --color-sky-blue-light: #38BDF8;
  --color-sky-blue-soft: #E0F2FE;
  --color-sky-blue-dark: #0056C7;
  --color-candy-pink: #FF6584;
  --color-candy-pink-soft: #FFF1F4;
  --color-candy-amber: #F59E0B;
  --color-candy-amber-soft: #FEF3C7;
  --color-candy-mint: #10B981;
  --color-candy-mint-soft: #D1FAE5;
  --color-candy-purple: #8B5CF6;
  --color-candy-purple-soft: #EDE9FE;

  /* Text & Border Colors */
  --color-text-main: #0F172A;
  --color-text-body: #334155;
  --color-text-muted: #64748B;
  --color-text-light: #94A3B8;
  --color-border-soft: rgba(226, 232, 240, 0.85);
  --color-border-glow: rgba(56, 189, 248, 0.35);

  /* Shadows & Elevations */
  --shadow-sm: 0 2px 8px rgba(0, 112, 255, 0.04), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 28px -6px rgba(0, 112, 255, 0.09), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 24px 48px -12px rgba(0, 112, 255, 0.14), 0 12px 24px -4px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.28);
  --shadow-candy-pink: 0 10px 25px -5px rgba(255, 101, 132, 0.35);

  /* Radius */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text-body);
  background-color: var(--color-milky-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 10% 8%, rgba(56, 189, 248, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 25%, rgba(255, 101, 132, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 65%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 20% 92%, rgba(56, 189, 248, 0.1) 0%, transparent 45%);
  background-attachment: fixed;
}

a {
  color: var(--color-sky-blue);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-sky-blue-dark);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-wrapper {
  padding: 85px 0;
  position: relative;
}

@media (max-width: 768px) {
  .section-wrapper {
    padding: 55px 0;
  }
}

.text-center {
  text-align: center;
}

/* Section Header Badges & Headings */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--color-sky-blue-soft);
  color: var(--color-sky-blue);
  border: 1px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.15);
  margin-bottom: 16px;
}

.badge-pill.pink {
  background: var(--color-candy-pink-soft);
  color: var(--color-candy-pink);
  border-color: rgba(255, 101, 132, 0.3);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.12rem;
  color: var(--color-text-muted);
  max-width: 740px;
  margin: 0 auto 52px;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.85rem;
  }
  .section-desc {
    font-size: 1rem;
    margin-bottom: 36px;
  }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border-soft);
  transition: var(--transition);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  max-width: 1360px;
  width: 100%;
  padding-left: 24px;
  padding-right: 24px;
  margin-left: auto;
  margin-right: auto;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo-img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 112, 255, 0.25);
  flex-shrink: 0;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  white-space: nowrap;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.15;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--color-sky-blue);
  font-weight: 600;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
  margin: 0 16px;
  flex-shrink: 1;
}

.nav-links li {
  white-space: nowrap;
  flex-shrink: 0;
  list-style: none;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--color-text-body);
  position: relative;
  padding: 8px 4px;
  white-space: nowrap !important;
  word-break: keep-all !important;
  display: inline-block;
  line-height: 1.3;
}

.nav-link:hover {
  color: var(--color-sky-blue);
}

.nav-link.active {
  color: var(--color-sky-blue);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-sky-blue);
  transition: width 0.2s ease;
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mobile-nav-cta {
  display: none !important;
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #0070FF 0%, #0084FF 50%, #38BDF8 100%);
  color: #FFFFFF;
  box-shadow: 0 8px 20px -4px rgba(0, 112, 255, 0.42);
}

.btn-primary:hover {
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -4px rgba(0, 112, 255, 0.55);
}

.btn-candy-pink {
  background: linear-gradient(135deg, #FF6584 0%, #FF7E9C 100%);
  color: #FFFFFF;
  box-shadow: var(--shadow-candy-pink);
}

.btn-candy-pink:hover {
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -4px rgba(255, 101, 132, 0.45);
}

.btn-outline {
  background: var(--color-milky-pure);
  color: var(--color-text-main);
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  border-color: var(--color-sky-blue);
  color: var(--color-sky-blue);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.1rem;
}

/* Mobile Hamburger Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 3px;
  background: var(--color-text-main);
  border-radius: 2px;
  transition: var(--transition);
}

@media (min-width: 1101px) and (max-width: 1260px) {
  .nav-links {
    gap: 14px;
    margin: 0 10px;
  }
  .nav-link {
    font-size: 0.9rem;
    padding: 6px 2px;
  }
  .header-cta-group {
    gap: 8px;
  }
  .header-cta-group .btn {
    padding: 9px 16px;
    font-size: 0.88rem;
  }
}

@media (max-width: 1100px) {
  .mobile-menu-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    gap: 16px;
    border-bottom: 1px solid var(--color-border-soft);
    display: none;
    margin: 0;
    z-index: 999;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links.open .mobile-nav-cta {
    display: block !important;
    width: 100%;
    margin-top: 6px;
  }
  .nav-links.open .mobile-nav-cta .btn {
    width: 100%;
  }
  .header-cta-group .btn-outline {
    display: none;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 60px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-slogan-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 16px rgba(0, 112, 255, 0.1);
  margin-bottom: 22px;
}

.hero-slogan-badge .pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-candy-mint);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
  animation: pulse-ring 2s infinite;
}

.hero-slogan-badge span {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-sky-blue);
}

.hero-h1 {
  font-size: 3.1rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.hero-h1 .gradient-text {
  background: linear-gradient(135deg, #0070FF 0%, #38BDF8 60%, #FF6584 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin-bottom: 34px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-meta-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  padding-top: 10px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.hero-meta-item svg {
  color: var(--color-candy-mint);
  width: 18px;
  height: 18px;
}

/* Hero Mascot Graphic */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mascot-container {
  width: 100%;
  max-width: 460px;
  position: relative;
}

.hero-mascot-svg {
  width: 100%;
  filter: drop-shadow(0 20px 35px rgba(0, 112, 255, 0.16));
  animation: float-mascot 4s ease-in-out infinite;
}

/* Floating Glass Badges around Mascot */
.mascot-tag {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  animation: float-tag 3.5s ease-in-out infinite;
}

.mascot-tag-1 {
  top: 12%;
  left: -8%;
  color: var(--color-sky-blue);
  animation-delay: 0.2s;
}

.mascot-tag-2 {
  bottom: 16%;
  right: -6%;
  color: var(--color-candy-pink);
  animation-delay: 1.2s;
}

.mascot-tag-3 {
  bottom: 0;
  left: 6%;
  color: var(--color-candy-mint);
  animation-delay: 0.8s;
}

@keyframes float-mascot {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-16px) rotate(1.5deg);
  }
}

@keyframes float-tag {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes pulse-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero-lead {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions, .hero-meta-badges {
    justify-content: center;
  }
  .hero-h1 {
    font-size: 2.4rem;
  }
  .mascot-tag {
    display: none;
  }
}

/* ==========================================================================
   Brand Story & Philosophy Section
   ========================================================================== */
.brand-intro-card {
  background: linear-gradient(145deg, #FFFFFF 0%, #F5F9FF 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-glow);
  box-shadow: var(--shadow-lg);
  padding: 48px 52px;
  position: relative;
  overflow: hidden;
  margin-bottom: 24px;
}

.brand-intro-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22) 0%, transparent 70%);
  pointer-events: none;
}

.brand-story-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 40px;
}

.brand-story-content h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 12px;
}

.brand-story-content .brand-subtitle {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-sky-blue);
  margin-bottom: 20px;
}

.brand-story-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-body);
  margin-bottom: 16px;
}

.brand-quote-box {
  background: var(--color-sky-blue-soft);
  border-left: 4px solid var(--color-sky-blue);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-weight: 700;
  color: var(--color-sky-blue-dark);
  margin-top: 24px;
}

.brand-feature-pills {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.brand-pill-card {
  background: var(--color-milky-pure);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: var(--transition);
}

.brand-pill-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-sky-blue-light);
}

.brand-pill-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.brand-pill-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.brand-pill-info p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

@media (max-width: 992px) {
  .brand-intro-card {
    padding: 32px 24px;
  }
  .brand-story-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* ==========================================================================
   Core Advantages Grid
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-milky-pure);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-glow);
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 22px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.feature-tag {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Pricing Section (Matching Image 1)
   ========================================================================== */
.pricing-section {
  position: relative;
}

.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: #0F172A; /* High-tech dark contrast card matching the original screenshot style */
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: #38BDF8;
  box-shadow: 0 24px 50px rgba(0, 112, 255, 0.3);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #131F37 0%, #0F172A 100%);
  border: 2px solid #0070FF;
  box-shadow: 0 20px 45px rgba(0, 112, 255, 0.35);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.plan-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0070FF 0%, #38BDF8 100%);
  color: #FFFFFF;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(0, 112, 255, 0.4);
}

.plan-header {
  margin-bottom: 24px;
}

.plan-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 12px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
}

.price-period {
  font-size: 1rem;
  color: #94A3B8;
  font-weight: 500;
}

.plan-sub-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 22px;
}

.plan-label {
  font-size: 0.88rem;
  color: #94A3B8;
}

.annual-save-badge {
  font-size: 0.85rem;
  color: #38BDF8;
  font-weight: 700;
}

.plan-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.94rem;
  color: #E2E8F0;
  line-height: 1.5;
}

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 3px;
  color: #38BDF8;
}

.plan-feature-item strong {
  color: #FFFFFF;
}

.pricing-btn {
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background: #1E293B;
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: center;
  transition: var(--transition);
  display: block;
}

.pricing-btn:hover {
  background: #0070FF;
  border-color: #0070FF;
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(0, 112, 255, 0.4);
}

.pricing-card.featured .pricing-btn {
  background: linear-gradient(135deg, #0070FF 0%, #0084FF 100%);
  border: none;
}

.pricing-card.featured .pricing-btn:hover {
  background: linear-gradient(135deg, #0056C7 0%, #0070FF 100%);
}

.pricing-guarantee-note {
  margin-top: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

@media (max-width: 992px) {
  .pricing-cards-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
}

/* ==========================================================================
   Six SEO Recommended Articles Section
   ========================================================================== */
.articles-section {
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--color-milky-pure);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-glow);
}

.article-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.article-category {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.article-read-time {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.article-title {
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-title a {
  color: inherit;
}

.article-title a:hover {
  color: var(--color-sky-blue);
}

.article-excerpt {
  font-size: 0.92rem;
  color: var(--color-text-body);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(226, 232, 240, 0.6);
}

.article-keyword-tag {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-sky-blue);
}

.article-read-link {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-read-link:hover {
  color: var(--color-sky-blue);
  gap: 8px;
}

@media (max-width: 992px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   User Testimonials (用户评价)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.testimonial-card {
  background: var(--color-milky-pure);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonial-stars {
  color: #FBBF24;
  font-size: 1.15rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin-bottom: 22px;
  font-style: normal;
}

.testimonial-author-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #FFFFFF;
}

.author-meta h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.author-meta p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--color-candy-mint);
  font-weight: 600;
}

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   FAQ Section (Accordion)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-milky-pure);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--color-border-glow);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 28px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-text-main);
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-sky-blue-soft);
  color: var(--color-sky-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--color-candy-pink-soft);
  color: var(--color-candy-pink);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--color-text-body);
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 24px;
}

/* ==========================================================================
   Full Article Page Specific Styles
   ========================================================================== */
.article-header-hero {
  padding: 48px 0 32px;
  background: linear-gradient(180deg, rgba(224, 242, 254, 0.4) 0%, rgba(248, 250, 253, 0) 100%);
  border-bottom: 1px solid var(--color-border-soft);
  margin-bottom: 40px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--color-text-muted);
}

.breadcrumb-nav a:hover {
  color: var(--color-sky-blue);
}

.article-full-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1.28;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.article-body-layout {
  display: grid;
  grid-template-columns: 2.5fr 1fr;
  gap: 48px;
  align-items: start;
}

.article-content {
  background: var(--color-milky-pure);
  border-radius: var(--radius-lg);
  padding: 48px 42px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
  font-size: 1.05rem;
  line-height: 1.85;
  color: #1E293B;
}

.article-content h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin: 40px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-sky-blue-soft);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin: 30px 0 14px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.article-content strong {
  color: var(--color-text-main);
}

.article-callout {
  background: #F0F9FF;
  border-left: 4px solid var(--color-sky-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 26px 0;
}

.article-callout.pink {
  background: #FFF1F4;
  border-left-color: var(--color-candy-pink);
}

.article-callout h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text-main);
}

.article-callout p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-body);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-table th, .article-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-soft);
}

.article-table th {
  background: #E0F2FE;
  font-weight: 700;
  color: #0369A1;
}

.article-table tr:nth-child(even) td {
  background: #F8FAFC;
}

.code-snippet {
  background: #0F172A;
  color: #F8FAFC;
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
  overflow-x: auto;
  margin: 22px 0;
  line-height: 1.6;
}

/* Internal Linking Box */
.internal-link-card {
  background: linear-gradient(135deg, #F0F7FF 0%, #FFFFFF 100%);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 32px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.internal-link-text h5 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.internal-link-text p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Sidebar Widgets */
.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--color-milky-pure);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  border: 1px solid var(--color-border-soft);
  box-shadow: var(--shadow-sm);
}

.sidebar-widget h4 {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-sky-blue-soft);
}

.sidebar-toc-list, .sidebar-article-list {
  list-style: none;
}

.sidebar-toc-list li, .sidebar-article-list li {
  margin-bottom: 12px;
}

.sidebar-toc-list a, .sidebar-article-list a {
  font-size: 0.92rem;
  color: var(--color-text-body);
  display: block;
  line-height: 1.45;
}

.sidebar-toc-list a:hover, .sidebar-article-list a:hover {
  color: var(--color-sky-blue);
  padding-left: 4px;
}

.sidebar-promo-card {
  background: linear-gradient(135deg, #0070FF 0%, #0084FF 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 16px 36px rgba(0, 112, 255, 0.35);
}

.sidebar-promo-card h4 {
  color: #FFFFFF;
  border: none;
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.sidebar-promo-card p {
  font-size: 0.92rem;
  color: #E0F2FE;
  margin-bottom: 20px;
}

@media (max-width: 992px) {
  .article-body-layout {
    grid-template-columns: 1fr;
  }
  .article-content {
    padding: 30px 20px;
  }
  .article-full-title {
    font-size: 1.85rem;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #0B1120;
  color: #94A3B8;
  padding: 70px 0 35px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-col p {
  margin-top: 16px;
  line-height: 1.7;
  max-width: 320px;
  font-size: 0.9rem;
}

.footer-col h5 {
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 11px;
}

.footer-links a {
  color: #94A3B8;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #38BDF8;
  padding-left: 4px;
}

.footer-keyword-cloud {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 30px;
}

.footer-keyword-cloud h6 {
  color: #E2E8F0;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.keyword-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-tag-link {
  font-size: 0.8rem;
  color: #64748B;
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.keyword-tag-link:hover {
  color: #38BDF8;
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.84rem;
}

.disclaimer-text {
  font-size: 0.78rem;
  color: #64748B;
  line-height: 1.5;
  margin-top: 8px;
}

@media (max-width: 992px) {
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Mobile Bottom Floating CTA Bar
   ========================================================================== */
.mobile-floating-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border-soft);
  padding: 10px 16px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
}

.mobile-floating-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-floating-info {
  display: flex;
  flex-direction: column;
}

.mobile-floating-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.2;
}

.mobile-floating-sub {
  font-size: 0.75rem;
  color: var(--color-candy-pink);
  font-weight: 600;
}

.mobile-floating-cta {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .mobile-floating-bar {
    display: block;
  }
  body {
    padding-bottom: 70px;
  }
}

/* ==========================================================================
   Section Transition · 章节过渡与高级滚动展示动画
   ========================================================================== */

/* 1. 全局背景光晕画布 (随着滚动不同章节柔和流转) */
.site-ambient-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(85px);
  -webkit-filter: blur(85px);
  opacity: 0.65;
  transition: transform 1.5s cubic-bezier(0.16, 1, 0.3, 1),
              background 1.5s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 1.5s cubic-bezier(0.16, 1, 0.3, 1),
              width 1.5s ease,
              height 1.5s ease;
  will-change: transform, background, opacity;
}

/* 初始状态：Hero 章节 (天空蓝与糖果粉交融) */
.ambient-orb-1 {
  width: 520px;
  height: 520px;
  top: -100px;
  left: -80px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.28) 0%, rgba(0, 112, 255, 0.12) 60%, transparent 75%);
}

.ambient-orb-2 {
  width: 480px;
  height: 480px;
  top: 15%;
  right: -100px;
  background: radial-gradient(circle, rgba(255, 101, 132, 0.22) 0%, rgba(255, 168, 197, 0.08) 60%, transparent 75%);
}

.ambient-orb-3 {
  width: 600px;
  height: 600px;
  bottom: -150px;
  left: 30%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.16) 0%, rgba(56, 189, 248, 0.06) 60%, transparent 75%);
}

/* 章节 1：进入 #about (品牌故事 · 温暖粉桃与奶白暖意) */
body[data-active-section="about"] .ambient-orb-1 {
  transform: translate(120px, 160px) scale(1.1);
  background: radial-gradient(circle, rgba(255, 101, 132, 0.28) 0%, rgba(255, 194, 209, 0.12) 60%, transparent 75%);
}

body[data-active-section="about"] .ambient-orb-2 {
  transform: translate(-140px, 80px) scale(1.15);
  background: radial-gradient(circle, rgba(56, 189, 248, 0.24) 0%, rgba(0, 112, 255, 0.1) 60%, transparent 75%);
}

body[data-active-section="about"] .ambient-orb-3 {
  transform: translate(-80px, -60px) scale(0.9);
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
}

/* 章节 2：进入 #features (服务优势 · 极速科技青翠与活力蓝) */
body[data-active-section="features"] .ambient-orb-1 {
  transform: translate(180px, 320px) scale(1.2);
  background: radial-gradient(circle, rgba(0, 112, 255, 0.3) 0%, rgba(56, 189, 248, 0.14) 60%, transparent 75%);
}

body[data-active-section="features"] .ambient-orb-2 {
  transform: translate(-200px, 200px) scale(1.1);
  background: radial-gradient(circle, rgba(16, 185, 129, 0.22) 0%, rgba(56, 189, 248, 0.08) 60%, transparent 75%);
}

body[data-active-section="features"] .ambient-orb-3 {
  transform: translate(60px, -120px) scale(1.05);
  background: radial-gradient(circle, rgba(2, 132, 199, 0.2) 0%, transparent 70%);
}

/* 章节 3：进入 #pricing (套餐价格 · 宇宙深蓝暗夜与璀璨星河光晕) */
body[data-active-section="pricing"] .site-ambient-backdrop {
  opacity: 0.95;
}

body[data-active-section="pricing"] .ambient-orb-1 {
  transform: translate(300px, 460px) scale(1.4);
  background: radial-gradient(circle, rgba(0, 112, 255, 0.45) 0%, rgba(56, 189, 248, 0.2) 55%, transparent 75%);
}

body[data-active-section="pricing"] .ambient-orb-2 {
  transform: translate(-260px, 380px) scale(1.35);
  background: radial-gradient(circle, rgba(56, 189, 248, 0.35) 0%, rgba(0, 86, 199, 0.15) 55%, transparent 75%);
}

body[data-active-section="pricing"] .ambient-orb-3 {
  transform: translate(0px, -200px) scale(1.2);
  background: radial-gradient(circle, rgba(139, 92, 246, 0.28) 0%, transparent 70%);
}

/* 章节 4：进入 #articles (知识博客 · 晨曦天空蓝与柔和丁香紫) */
body[data-active-section="articles"] .ambient-orb-1 {
  transform: translate(80px, 620px) scale(1.05);
  background: radial-gradient(circle, rgba(56, 189, 248, 0.26) 0%, rgba(139, 92, 246, 0.12) 60%, transparent 75%);
}

body[data-active-section="articles"] .ambient-orb-2 {
  transform: translate(-100px, 540px) scale(1.1);
  background: radial-gradient(circle, rgba(255, 101, 132, 0.18) 0%, transparent 70%);
}

/* 章节 5：进入 #reviews (用户口碑 · 温暖香槟金与蜜桃糖果) */
body[data-active-section="reviews"] .ambient-orb-1 {
  transform: translate(220px, 780px) scale(1.15);
  background: radial-gradient(circle, rgba(245, 158, 11, 0.22) 0%, rgba(254, 243, 199, 0.1) 60%, transparent 75%);
}

body[data-active-section="reviews"] .ambient-orb-2 {
  transform: translate(-180px, 720px) scale(1.2);
  background: radial-gradient(circle, rgba(255, 101, 132, 0.22) 0%, transparent 70%);
}

/* 章节 6：进入 #faq (常见问题 · 清新天蓝与纯净奶白) */
body[data-active-section="faq"] .ambient-orb-1 {
  transform: translate(140px, 920px) scale(1.1);
  background: radial-gradient(circle, rgba(0, 112, 255, 0.25) 0%, rgba(56, 189, 248, 0.12) 60%, transparent 75%);
}

body[data-active-section="faq"] .ambient-orb-2 {
  transform: translate(-120px, 860px) scale(1.05);
  background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, transparent 70%);
}

/* 2. 套餐章节上下柔和过渡渐变带 (消除生硬拼接，如水般自然浸润) */
.pricing-section {
  position: relative;
  overflow: visible;
  transition: background 1s ease;
}

.pricing-transition-blend-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: linear-gradient(180deg, var(--color-milky-bg) 0%, rgba(15, 23, 42, 0) 100%);
  pointer-events: none;
  z-index: 2;
  opacity: 0.9;
}

.pricing-transition-blend-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: linear-gradient(0deg, var(--color-milky-bg) 0%, rgba(15, 23, 42, 0) 100%);
  pointer-events: none;
  z-index: 2;
  opacity: 0.9;
}

.pricing-ambient-cloud-glow {
  position: absolute;
  top: 42%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 720px;
  height: 380px;
  background: radial-gradient(circle, rgba(0, 112, 255, 0.28) 0%, rgba(56, 189, 248, 0.14) 50%, transparent 75%);
  filter: blur(70px);
  -webkit-filter: blur(70px);
  pointer-events: none;
  z-index: 0;
  animation: pulse-pricing-glow 7s ease-in-out infinite alternate;
}

@keyframes pulse-pricing-glow {
  0% {
    transform: translate(-50%, -50%) scale(0.92);
    opacity: 0.65;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.18);
    opacity: 1;
  }
}

.pricing-section .container {
  position: relative;
  z-index: 1;
}

/* 3. 标题与说明文稿章节进入动画 (Header Soft Reveal) */
.section-header-reveal {
  opacity: 0;
  transform: translateY(28px);
  filter: blur(6px);
  -webkit-filter: blur(6px);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.85s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
}

.section-header-reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
  -webkit-filter: blur(0);
}

/* 4. 卡片梯次级联进入动画 (Staggered Card Cascade) */
.stagger-reveal {
  opacity: 0;
  transform: translateY(32px) scale(0.97);
  filter: blur(5px);
  -webkit-filter: blur(5px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
}

.stagger-reveal.is-revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
  -webkit-filter: blur(0);
}

/* 品牌故事介绍卡特殊进入浮动感 */
.brand-intro-card {
  transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.9s cubic-bezier(0.16, 1, 0.3, 1),
              filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 5. 减弱动态无障碍支持 (Accessibility) */
@media (prefers-reduced-motion: reduce) {
  .section-header-reveal,
  .stagger-reveal,
  .site-ambient-backdrop,
  .ambient-orb,
  .pricing-ambient-cloud-glow {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
    animation: none !important;
  }
}