/* ===================================================
   扬帆云 - 浅色科技霓虹风主样式 (Light Sci-Fi Theme)
   yangfanyunjc.com
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+SC:wght@300;400;500;700;800;900&display=swap');

/* ---- CSS Variables (Light Theme) ---- */
:root {
  --primary:       #7C3AED;
  --primary-dark:  #5B21B6;
  --primary-light: #6D28D9;
  --accent:        #D946EF;
  --accent-glow:   #EC4899;
  --blue:          #4F46E5;
  --blue-light:    #3B82F6;
  --pink:          #EC4899;

  --bg-dark:       #F8FAFC;
  --bg-card:       #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --border:        rgba(124,58,237,0.15);
  --border-glow:   rgba(124,58,237,0.4);

  --text-primary:  #0F172A;
  --text-secondary:#334155;
  --text-muted:    #64748B;

  --grad-hero:     linear-gradient(135deg, #F8FAFC 0%, #EEF2FF 50%, #FAF5FF 100%);
  --grad-purple:   linear-gradient(135deg, #4F46E5, #7C3AED, #C084FC);
  --grad-btn:      linear-gradient(135deg, #6D28D9 0%, #8B5CF6 50%, #D946EF 100%);

  --shadow-glow:   0 10px 40px rgba(124,58,237,0.2);
  --shadow-card:   0 4px 25px rgba(15,23,42,0.06);
  --shadow-neon:   0 10px 30px rgba(217,70,239,0.3), 0 0 20px rgba(124,58,237,0.2);

  --radius:        16px;
  --radius-lg:     24px;
  --transition:    all 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--bg-dark);
}

html::-webkit-scrollbar { width: 6px; }
html::-webkit-scrollbar-track { background: var(--bg-dark); }
html::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

body {
  font-family: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; }
ul { list-style: none; }

/* ---- Custom Cursor ---- */
#cursor-dot {
  position: fixed;
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transition: transform 0.1s ease, opacity 0.3s;
  box-shadow: 0 0 10px var(--primary), 0 0 20px var(--accent);
  transform: translate(-50%, -50%);
}

#cursor-ring {
  position: fixed;
  width: 36px;
  height: 36px;
  border: 1.5px solid rgba(124,58,237,0.5);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transition: transform 0.15s ease, width 0.3s, height 0.3s, border-color 0.3s;
  transform: translate(-50%, -50%);
}

#cursor-ring.hovering {
  width: 56px;
  height: 56px;
  border-color: var(--accent);
  background: rgba(217,70,239,0.08);
}

/* ---- Particle Canvas ---- */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

/* ---- Navigation ---- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 5%;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(124,58,237,0.12);
  transition: var(--transition);
}

#navbar.scrolled {
  background: rgba(255,255,255,0.96);
  border-bottom-color: rgba(124,58,237,0.22);
  box-shadow: 0 4px 30px rgba(124,58,237,0.1);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--grad-purple);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(124,58,237,0.3);
}

.nav-logo .logo-text {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #1E293B;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  width: 0; height: 2.5px;
  background: var(--grad-purple);
  transform: translateX(-50%);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(124,58,237,0.08);
}

.nav-link:hover::after { width: 60%; }

.nav-cta {
  padding: 10px 24px;
  background: var(--grad-btn);
  border-radius: 10px;
  font-weight: 800;
  font-size: 0.95rem;
  color: #FFFFFF !important;
  text-shadow: 0 1px 2px rgba(0,0,0,0.25);
  box-shadow: 0 4px 20px rgba(109,40,217,0.4);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  letter-spacing: 0.3px;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(109,40,217,0.6);
  color: #FFFFFF !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  display: block;
  width: 25px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- BUTTONS (EXPLICIT HIGH-CONTRAST STYLES) ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: var(--grad-btn);
  color: #FFFFFF !important;
  border-radius: 14px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
  box-shadow: 0 8px 30px rgba(109,40,217,0.45);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none !important;
}

.btn-primary *,
.btn-primary span {
  color: #FFFFFF !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover {
  transform: translateY(-3px);
  color: #FFFFFF !important;
  box-shadow: 0 12px 35px rgba(109,40,217,0.6);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: #FFFFFF;
  color: #5B21B6 !important;
  border-radius: 14px;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.3px;
  border: 2px solid #7C3AED;
  box-shadow: 0 4px 15px rgba(124,58,237,0.12);
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none !important;
}

.btn-outline *,
.btn-outline span {
  color: #5B21B6 !important;
  font-weight: 800;
}

.btn-outline:hover {
  background: #7C3AED;
  color: #FFFFFF !important;
  border-color: #7C3AED;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(124,58,237,0.35);
}

.btn-outline:hover *,
.btn-outline:hover span {
  color: #FFFFFF !important;
}

/* ---- Hero Section ---- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 5% 80px;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(124,58,237,0.12) 0%, transparent 70%),
              radial-gradient(ellipse 60% 40% at 15% 75%, rgba(79,70,229,0.08) 0%, transparent 60%),
              radial-gradient(ellipse 60% 40% at 85% 25%, rgba(217,70,239,0.08) 0%, transparent 60%),
              var(--grad-hero);
  z-index: 1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124,58,237,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,58,237,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  animation: orbFloat 8s ease-in-out infinite;
  z-index: 1;
}

.hero-orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.18), transparent 70%);
  top: -100px; left: -100px;
}

.hero-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(217,70,239,0.15), transparent 70%);
  bottom: -80px; right: -80px;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(79,70,229,0.12), transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -2s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(124,58,237,0.08);
  border: 1.5px solid rgba(124,58,237,0.3);
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 800;
  color: #5B21B6;
  margin-bottom: 28px;
  animation: fadeInDown 0.8s ease;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 10px rgba(124,58,237,0.08);
}

.hero-badge .dot {
  width: 8px; height: 8px;
  background: #06B6D4;
  border-radius: 50%;
  animation: pulse-dot 1.5s infinite;
  box-shadow: 0 0 8px #06B6D4;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  animation: fadeInUp 0.9s ease 0.1s both;
  letter-spacing: -1px;
}

.hero-title .line1 {
  display: block;
  color: #0F172A;
}

.hero-title .line2 {
  display: block;
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 4px 15px rgba(124,58,237,0.2));
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 24px;
  animation: fadeInUp 0.9s ease 0.2s both;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 600;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
  animation: fadeInUp 0.9s ease 0.3s both;
}

.hero-tag {
  padding: 6px 16px;
  background: #FFFFFF;
  border: 1.5px solid rgba(124,58,237,0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #5B21B6;
  box-shadow: 0 2px 8px rgba(15,23,42,0.05);
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.9s ease 0.4s both;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.9s ease 0.5s both;
}

.hero-stat {
  text-align: center;
  background: #FFFFFF;
  padding: 16px 28px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-card);
}

.hero-stat .num {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 700;
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: fadeIn 1s ease 1s both;
}

.scroll-indicator {
  width: 28px;
  height: 48px;
  border: 2px solid rgba(124,58,237,0.3);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  background: #FFFFFF;
}

.scroll-indicator::before {
  content: '';
  width: 4px; height: 10px;
  background: var(--primary);
  border-radius: 2px;
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: 0.3; }
}

/* ---- Section Base ---- */
section {
  position: relative;
  z-index: 2;
  padding: 100px 5%;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(124,58,237,0.08);
  border: 1.5px solid rgba(124,58,237,0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 800;
  color: #5B21B6;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-title .highlight {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-weight: 600;
}

/* ---- Use Case Search Section ---- */
#usecase {
  padding: 80px 5%;
  background: rgba(124,58,237,0.03);
}

.usecase-search {
  max-width: 700px;
  margin: 0 auto 48px;
  position: relative;
}

.search-input-wrap {
  position: relative;
}

.search-input-wrap input {
  width: 100%;
  padding: 18px 60px 18px 56px;
  background: #FFFFFF;
  border: 2px solid rgba(124,58,237,0.3);
  border-radius: 50px;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(15,23,42,0.05);
}

.search-input-wrap input::placeholder { color: var(--text-muted); }
.search-input-wrap input:focus {
  border-color: var(--primary);
  background: #FFFFFF;
  box-shadow: 0 0 25px rgba(124,58,237,0.2);
}

.search-icon {
  position: absolute;
  left: 20px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
}

.search-btn {
  position: absolute;
  right: 8px; top: 50%;
  transform: translateY(-50%);
  padding: 10px 24px;
  background: var(--grad-btn);
  border: none;
  border-radius: 40px;
  color: #FFFFFF !important;
  font-weight: 800;
  font-size: 0.92rem;
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover { box-shadow: 0 4px 15px rgba(109,40,217,0.5); color: #FFFFFF !important; }

.usecase-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}

.usecase-tab {
  padding: 10px 22px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #334155;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
}

.usecase-tab:hover, .usecase-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF !important;
  box-shadow: 0 4px 18px rgba(124,58,237,0.4);
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.usecase-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px 16px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  box-shadow: 0 2px 10px rgba(15,23,42,0.04);
}

.usecase-card:hover {
  background: #FFFFFF;
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(124,58,237,0.18);
}

.usecase-card .icon {
  width: 48px; height: 48px;
  background: rgba(124,58,237,0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.usecase-card .name {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text-primary);
}

.usecase-card .tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ---- Advantages Section ---- */
#advantages {
  position: relative;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.adv-card {
  position: relative;
  padding: 36px 28px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
  cursor: default;
  box-shadow: var(--shadow-card);
}

.adv-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.04), rgba(217,70,239,0.03));
  opacity: 0;
  transition: opacity 0.3s;
  border-radius: inherit;
}

.adv-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 15px 45px rgba(124,58,237,0.15);
}

.adv-card:hover::before { opacity: 1; }

.adv-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.adv-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
  color: var(--text-primary);
}

.adv-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
  font-weight: 500;
}

.adv-num {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 3rem;
  font-weight: 900;
  color: rgba(124,58,237,0.1);
  line-height: 1;
  z-index: 0;
  transition: var(--transition);
}

.adv-card:hover .adv-num {
  color: rgba(124,58,237,0.22);
}

/* Adv card color variants */
.adv-card:nth-child(1) .adv-icon { background: rgba(79,70,229,0.12); }
.adv-card:nth-child(2) .adv-icon { background: rgba(124,58,237,0.12); }
.adv-card:nth-child(3) .adv-icon { background: rgba(168,85,247,0.12); }
.adv-card:nth-child(4) .adv-icon { background: rgba(217,70,239,0.12); }
.adv-card:nth-child(5) .adv-icon { background: rgba(236,72,153,0.12); }
.adv-card:nth-child(6) .adv-icon { background: rgba(37,99,235,0.12); }
.adv-card:nth-child(7) .adv-icon { background: rgba(6,182,212,0.12); }
.adv-card:nth-child(8) .adv-icon { background: rgba(16,185,129,0.12); }

/* ---- Pricing Section ---- */
#pricing {
  background: linear-gradient(180deg, transparent, rgba(124,58,237,0.04), transparent);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: start;
}

.pricing-card {
  background: #FFFFFF;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.pricing-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--grad-purple);
  opacity: 0;
  transition: opacity 0.3s;
}

.pricing-card:hover {
  border-color: rgba(124,58,237,0.5);
  transform: translateY(-8px);
  box-shadow: 0 15px 45px rgba(124,58,237,0.18);
}

.pricing-card:hover::after { opacity: 1; }

.pricing-card.featured {
  border-color: var(--primary);
  background: #FFFFFF;
  box-shadow: 0 10px 40px rgba(124,58,237,0.2);
  transform: scale(1.03);
}

.pricing-card.featured::after { opacity: 1; }
.pricing-card.featured:hover { transform: scale(1.03) translateY(-8px); }

.pricing-badge {
  display: inline-flex;
  padding: 5px 16px;
  background: var(--grad-btn);
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 800;
  color: #FFFFFF !important;
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.pricing-price .currency { font-size: 1.4rem; font-weight: 800; color: var(--primary); }
.pricing-price .amount { font-size: 3rem; font-weight: 900; line-height: 1; color: var(--text-primary); }
.pricing-price .period { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; }

.pricing-desc { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 28px; font-weight: 600; }

.pricing-btn {
  display: block;
  width: 100%;
  padding: 14px;
  text-align: center;
  border-radius: 12px;
  font-weight: 800;
  font-size: 1.05rem;
  transition: var(--transition);
  margin-bottom: 28px;
  cursor: pointer;
  border: none;
  letter-spacing: 0.3px;
  text-decoration: none !important;
}

.pricing-btn-outline {
  background: #FFFFFF;
  border: 2px solid #7C3AED !important;
  color: #5B21B6 !important;
}

.pricing-btn-outline:hover {
  background: #7C3AED;
  color: #FFFFFF !important;
  box-shadow: 0 6px 20px rgba(124,58,237,0.4);
}

.pricing-btn-filled {
  background: var(--grad-btn);
  color: #FFFFFF !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
  box-shadow: 0 6px 25px rgba(109,40,217,0.45);
}

.pricing-btn-filled:hover {
  box-shadow: 0 10px 35px rgba(109,40,217,0.65);
  transform: translateY(-2px);
  color: #FFFFFF !important;
}

.pricing-features { border-top: 1.5px solid var(--border); padding-top: 24px; }

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.pricing-feature .check {
  width: 20px; height: 20px;
  background: rgba(124,58,237,0.14);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  font-size: 0.68rem;
  color: var(--primary);
  font-weight: 900;
}

.pricing-note {
  text-align: center;
  margin-top: 40px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.pricing-note strong {
  color: var(--primary-dark);
}

/* ---- Tutorial Section ---- */
#tutorial {
  background: rgba(124,58,237,0.02);
}

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.tutorial-step {
  position: relative;
  padding: 32px 24px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  counter-increment: step;
  box-shadow: var(--shadow-card);
}

.tutorial-step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 16px; right: 20px;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--primary);
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tutorial-step:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(124,58,237,0.15);
}

.step-icon {
  width: 56px; height: 56px;
  background: rgba(124,58,237,0.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-weight: 500;
}

.platform-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 48px;
}

.platform-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
}

.platform-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(124,58,237,0.08);
}

/* ---- Speed Test / Performance ---- */
#performance {
  position: relative;
}

.speed-display {
  max-width: 900px;
  margin: 0 auto;
}

.speed-hero-card {
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(124,58,237,0.12);
}

.speed-value {
  font-size: 5rem;
  font-weight: 900;
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.speed-label { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 24px; font-weight: 700; }

.speed-bars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.speed-bar-item { text-align: left; }
.speed-bar-label { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 0.85rem; font-weight: 700; }
.speed-bar-label .region { color: var(--text-secondary); }
.speed-bar-label .val { color: var(--primary-dark); font-weight: 800; }

.speed-bar-track {
  height: 10px;
  background: rgba(124,58,237,0.08);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.speed-bar-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, #4F46E5, #7C3AED, #D946EF);
  transform-origin: left;
  animation: fillBar 1.5s cubic-bezier(0.4,0,0.2,1) both;
  position: relative;
  box-shadow: 0 0 12px rgba(124,58,237,0.4);
}

.speed-bar-fill::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: -100px;
  width: 80px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
  animation: lightBeam 2.5s infinite linear;
}

@keyframes lightBeam {
  0% { left: -80px; }
  100% { left: 100%; }
}

@keyframes fillBar {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ---- Knowledge Base ---- */
#knowledge {
  background: rgba(124,58,237,0.03);
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.kb-card {
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.kb-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(124,58,237,0.15);
}

.kb-card-top {
  padding: 28px 28px 0;
}

.kb-tag {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.kb-tag-stream  { background: rgba(239,68,68,0.12); color: #DC2626; }
.kb-tag-ai      { background: rgba(6,182,212,0.12); color: #0891B2; }
.kb-tag-game    { background: rgba(16,185,129,0.12); color: #059669; }
.kb-tag-guide   { background: rgba(124,58,237,0.12); color: var(--primary); }
.kb-tag-speed   { background: rgba(245,158,11,0.12); color: #D97706; }
.kb-tag-privacy { background: rgba(236,72,153,0.12); color: #DB2777; }

.kb-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 10px;
  line-height: 1.45;
  transition: color 0.3s;
  color: var(--text-primary);
}

.kb-card:hover .kb-title { color: var(--primary); }

.kb-excerpt {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  font-weight: 500;
}

.kb-card-bottom {
  margin-top: auto;
  padding: 16px 28px 20px;
  border-top: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kb-meta { font-size: 0.78rem; color: var(--text-muted); font-weight: 600; }

.kb-arrow {
  width: 32px; height: 32px;
  background: rgba(124,58,237,0.1);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--primary);
  transition: var(--transition);
  font-weight: 900;
}

.kb-card:hover .kb-arrow {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
  transform: translateX(4px);
}

/* ---- Reviews Section ---- */
#reviews {
  overflow: hidden;
}

.reviews-track-wrap {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.reviews-track {
  display: flex;
  gap: 20px;
  animation: scrollReviews 40s linear infinite;
  width: max-content;
}

.reviews-track:hover { animation-play-state: paused; }

@keyframes scrollReviews {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.review-card {
  flex-shrink: 0;
  width: 320px;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.3s;
  box-shadow: var(--shadow-card);
}

.review-card:hover { border-color: var(--border-glow); }

.review-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
  color: #F59E0B;
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-weight: 500;
}

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

.review-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--grad-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.review-name { font-size: 0.88rem; font-weight: 800; color: var(--text-primary); }
.review-sub { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }

/* ---- FAQ Section ---- */
#faq {
  max-width: 800px;
  margin: 0 auto;
  padding-left: 5%;
  padding-right: 5%;
}

.faq-item {
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
  background: #FFFFFF;
  box-shadow: 0 2px 8px rgba(15,23,42,0.03);
}

.faq-item:hover { border-color: rgba(124,58,237,0.35); }
.faq-item.open { border-color: var(--primary); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 800;
  font-size: 0.98rem;
  gap: 16px;
  background: #FFFFFF;
  user-select: none;
  transition: background 0.3s;
  color: var(--text-primary);
}

.faq-item.open .faq-question { background: rgba(124,58,237,0.04); }

.faq-icon {
  width: 28px; height: 28px;
  background: rgba(124,58,237,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: var(--transition);
  font-weight: 900;
}

.faq-item.open .faq-icon {
  background: var(--primary);
  color: #FFFFFF;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
}

.faq-item.open .faq-answer { max-height: 400px; }

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1.5px solid var(--border);
  padding-top: 16px;
  font-weight: 500;
}

/* ---- Footer ---- */
#footer {
  background: #FFFFFF;
  border-top: 1.5px solid var(--border);
  padding: 64px 5% 40px;
  box-shadow: 0 -4px 20px rgba(15,23,42,0.03);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.footer-logo .logo-icon {
  width: 34px; height: 34px;
  background: var(--grad-purple);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.footer-logo .logo-text {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-desc {
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
  margin-bottom: 20px;
  font-weight: 500;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px; height: 36px;
  background: rgba(124,58,237,0.08);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

.social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
}

.footer-col-title {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-link {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color 0.3s;
  font-weight: 600;
}

.footer-link:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1.5px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy { font-size: 0.82rem; color: var(--text-muted); font-weight: 600; }

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color 0.3s;
  font-weight: 600;
}

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

/* ---- Floating CTA ---- */
#float-cta {
  position: fixed;
  bottom: 30px; right: 30px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.float-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--grad-btn);
  color: #FFFFFF !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
  border-radius: 50px;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  box-shadow: 0 8px 30px rgba(109,40,217,0.5);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  animation: floatBounce 3s ease-in-out infinite;
  text-decoration: none !important;
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.float-btn:hover {
  box-shadow: 0 12px 40px rgba(109,40,217,0.7);
  animation-play-state: paused;
  color: #FFFFFF !important;
}

/* ---- Article CTA Box ---- */
.article-cta-box {
  background: linear-gradient(135deg, rgba(109,40,217,0.08), rgba(217,70,239,0.06));
  border: 2px solid rgba(124,58,237,0.25);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  text-align: center;
  margin: 40px 0;
  box-shadow: 0 6px 25px rgba(124,58,237,0.08);
}

.article-cta-box h3 {
  font-size: 1.25rem;
  font-weight: 900;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.article-cta-box p { font-size: 0.92rem; margin-bottom: 24px; color: var(--text-secondary); font-weight: 600; }

.article-cta-box .btn-primary {
  display: inline-flex;
  padding: 14px 32px;
  font-size: 1.05rem;
  font-weight: 800;
  color: #FFFFFF !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* ---- Animations ---- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  #navbar .nav-menu { display: none; }
  #navbar .nav-toggle { display: flex; }

  #navbar .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 16px;
    border-bottom: 1.5px solid var(--border);
    gap: 4px;
    box-shadow: 0 10px 30px rgba(15,23,42,0.1);
  }

  .hero-title { font-size: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-card.featured { transform: scale(1); }

  #float-cta { bottom: 20px; right: 16px; }

  body { cursor: auto; }
  #cursor-dot, #cursor-ring { display: none; }
}

@media (max-width: 480px) {
  section { padding: 70px 5%; }
  .hero-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; max-width: 320px; }
}

/* ---- Article Page Specific ---- */
.article-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 120px 5% 80px;
  position: relative;
  z-index: 2;
}

.article-breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.article-breadcrumb a { color: var(--primary); font-weight: 700; }
.article-breadcrumb span { color: var(--text-muted); }

.article-header { margin-bottom: 40px; }
.article-category { margin-bottom: 16px; }
.article-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  font-weight: 600;
}

.article-divider {
  height: 1.5px;
  background: var(--border);
  margin: 32px 0;
}

.article-content { font-size: 0.98rem; line-height: 1.9; color: var(--text-secondary); font-weight: 500; }
.article-content h2 {
  font-size: 1.4rem; font-weight: 800;
  color: var(--text-primary);
  margin: 40px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}
.article-content h3 { font-size: 1.1rem; font-weight: 800; color: var(--text-primary); margin: 28px 0 12px; }
.article-content p { margin-bottom: 18px; }
.article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 18px; }
.article-content li { margin-bottom: 8px; }
.article-content strong { color: var(--text-primary); font-weight: 800; }
.article-content a { color: var(--primary); border-bottom: 1.5px solid rgba(124,58,237,0.3); font-weight: 700; }
.article-content a:hover { border-bottom-color: var(--primary); }

.speed-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
  background: #FFFFFF;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(15,23,42,0.04);
}

.speed-table th {
  padding: 14px 16px;
  background: rgba(124,58,237,0.1);
  text-align: left;
  font-weight: 800;
  color: #5B21B6;
  border-bottom: 1.5px solid var(--border);
}

.speed-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-weight: 500;
}

.speed-table tr:hover td { background: rgba(124,58,237,0.04); }

.highlight-box {
  background: rgba(124,58,237,0.08);
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 600;
}