:root {
  --primary-color: #6366f1; /* 科技紫 */
  --secondary-color: #a855f7; /* 渐变补色 */
  --accent-color: #22d3ee; /* 亮蓝点缀 */
  --bg-dark: #0f172a; /* 深蓝背景 */
  --card-bg: rgba(30, 41, 59, 0.7);
  --text-main: #f8fafc;
  --text-dim: #94a3b8;
  
  /* Octopus Section 变量 */
  --bg-deep: #0b0e14;
  --bg-card: #151b28;
  --text-primary: #ffffff;
  --text-secondary: #9ca3af;
  --indigo-500-30: rgba(99, 102, 241, 0.3);
  --indigo-900-30: rgba(49, 46, 129, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 导航 */
nav {
  padding: 1.5rem 10%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: padding 0.3s ease;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  background: linear-gradient(
    to right,
    var(--primary-color),
    var(--accent-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo i {
  -webkit-text-fill-color: initial;
  background: none;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  align-items: center;
}

.nav-links a {
  color: var(--text-main);
  text-decoration: none;
  margin-left: 2rem;
  font-size: 0.9rem;
  transition: color 0.3s;
}

/* 移动端导航菜单 */
.nav-check {
  display: none;
}

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

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: white;
  border-radius: 5px;
  transition: all 0.3s;
}

/* Section 通用类 */
.section-padding {
  padding: 50px 0;
  padding-left: 6rem;
  padding-right: 6rem;
}

.container-padding {
  padding: 0 40px;
}

.section-title {
  font-size: 42px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-desc {
  color: #94a3b8;
  font-size: 18px;
}

/* Feature Cards */
.feature-card-style {
  background: rgba(30, 41, 59, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  gap: 24px;
  transition: transform 0.3s, background 0.3s;
}
.feature-card-style:hover {
  transform: translateY(-5px);
  background: rgba(30, 41, 59, 0.8) !important;
  border-color: rgba(59, 130, 246, 0.5) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon-box {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.feature-title {
  color: white;
  font-size: 22px;
  margin: 0 0 12px 0;
  font-weight: 700;
}

.feature-text {
  color: #94a3b8;
  line-height: 1.6;
  margin: 0;
}

/* Octopus Section */
.octopus-section {
  color: var(--text-primary);
  width: 100%;
  margin-top: 7rem;
  padding: 0rem 8.5rem;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.text-center { text-align: center; }
.hero-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  margin: 0 0 1rem 0;
  color: white;
}
.gradient-text {
  background: linear-gradient(90deg, #818cf8 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 42rem;
  margin: 0 auto;
}

/* Grid Systems */
.grid-2-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}
.grid-3-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 0 6rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

/* Glass Card */
.glass-card {
  background-color: rgba(21, 27, 40, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-radius: 1rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.glass-card:hover {
  border-color: rgba(139, 92, 246, 0.5);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.3);
}
.glass-card.highlight {
  border-color: rgba(99, 102, 241, 0.3);
}
.card-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.card-value {
  font-size: 2.25rem;
  font-weight: 700;
  color: white;
  line-height: 1;
  margin-bottom: 0.25rem;
}
.card-unit {
  font-size: 1.5rem;
  margin-left: 0.25rem;
  color: #6b7280;
  font-weight: 400;
}
.card-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: #6b7280;
  padding: 0.25rem 0.5rem;
  background-color: #1f2937;
  border-radius: 9999px;
  margin-top: 0.5rem;
}
.card-tag.highlight-tag {
  color: rgba(49, 46, 129, 0.8);
  background-color: #c7d2fe;
  font-weight: 700;
}
.corner-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: linear-gradient(to left, #4f46e5, #9333ea);
  color: white;
  font-size: 10px;
  padding: 2px 8px;
  border-bottom-left-radius: 0.5rem;
}

/* Comparison Table */
.comparison-container {
  border-radius: 1.5rem;
  overflow: hidden;
  border: 1px solid #1f2937;
  background-color: #151b28;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  position: relative;
}
.top-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 66%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #6366f1, transparent);
  opacity: 0.5;
}
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}
.comparison-table th { padding: 1.5rem; font-weight: 500; }
@media (min-width: 768px) { .comparison-table th { padding: 2rem; } }
.comparison-table td {
  padding: 1.5rem;
  vertical-align: top;
  border-top: 1px solid rgba(31, 41, 55, 0.5);
}
.col-feature { width: 25%; color: #9ca3af; }
.col-octopus {
  width: 33.33%;
  text-align: center;
  background-color: rgba(49, 46, 129, 0.1);
  border-left: 1px solid rgba(99, 102, 241, 0.1);
  border-right: 1px solid rgba(99, 102, 241, 0.1);
  position: relative;
}
.col-others { width: 33.33%; text-align: center; color: #9ca3af; }
.highlight-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #6366f1 0%, #a855f7 100%);
}
.th-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.25rem;
}
.th-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  border-radius: 0.25rem;
}
.badge-purple {
  color: #a5b4fc;
  background-color: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
}
.badge-gray {
  color: #4b5563;
  background-color: #1f2937;
}
.row-title {
  color: #d1d5db;
  font-weight: 500;
  font-size: 1rem;
}
.row-subtitle {
  font-size: 0.75rem;
  color: #6b7280;
  margin-top: 0.25rem;
  font-weight: 400;
}
.check-icon {
  color: #34d399;
  font-size: 1.25rem;
  text-shadow: 0 0 8px rgba(52, 211, 153, 0.4);
}
.cross-icon { color: #64748b; font-size: 1.25rem; }
.cell-content { display: flex; gap: 0.75rem; text-align: left; }
.cell-main-text { font-weight: 700; font-size: 1rem; }
.text-white { color: white; }
.text-gray { color: #d1d5db; }
.cell-sub-text {
  color: #9ca3af;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}
.opacity-60 { opacity: 0.6; }
.comparison-table tr:hover td { background-color: rgba(255, 255, 255, 0.03); }
.comparison-table tr:hover .col-octopus { background-color: rgba(49, 46, 129, 0.15); }

/* Case Cards */
.section-top-padding { padding-top: 4rem; }
.case-card {
  background: #1e293b;
  border-radius: 16px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s;
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.user-info { display: flex; align-items: center; margin-bottom: 20px; }
.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-right: 12px;
  background: #334155;
}
.user-name { color: white; font-weight: 700; font-size: 16px; }
.user-tag {
  color: #94a3b8;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 4px;
}
.quote-box {
  background: rgba(15, 23, 42, 0.5);
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
  border-left: 3px solid #3b82f6;
  flex: 1;
}
.quote-box p {
  color: #cbd5e1;
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}
.proof-ui {
  background: #0f172a;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 15px;
  height: 45px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.result-tag { font-size: 14px; font-weight: 700; color: #f87171; }
@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* Pricing */
.pricing-section {
  padding-top: 2rem;
  padding-right: 10%;
  padding-left: 10%;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}
.pricing-card {
  background: var(--card-bg);
  padding: 3rem 2rem;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  position: relative;
}
.pricing-card.popular {
  border: 2px solid var(--primary-color);
  transform: scale(1.05);
  z-index: 2;
}
.badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--primary-color);
  padding: 0.2rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
}
.price {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 1.5rem 0;
}
.price span { font-size: 1rem; color: var(--text-dim); font-weight: 400; }
.price .original {
  text-decoration: line-through;
  font-size: 1rem;
  display: block;
  margin-bottom: -0.5rem;
}
.perks { list-style: none; margin-bottom: 2rem; flex-grow: 1; }
.perks li { margin-bottom: 0.8rem; font-size: 0.9rem; display: flex; align-items: center; gap: 0.8rem; }
.perks li i { color: #10b981; }

/* Solution Cards */
.solution-card {
  background: rgba(30, 41, 59, 0.4);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  overflow: hidden;
  transition: transform 0.3s;
}
.solution-card:hover {
  transform: translateY(-10px);
  background: rgba(30, 41, 59, 0.8) !important;
  border-color: rgba(59, 130, 246, 0.5) !important;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

/* Promo & Footer */
.final-promo {
  background: linear-gradient(
    to right,
    rgba(99, 102, 241, 0.1),
    rgba(168, 85, 247, 0.1)
  );
  padding: 5rem 10%;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.promo-title { font-size: 2.2rem; margin-bottom: 20px; color: #fff; }
.promo-stats { display: flex; justify-content: center; gap: 4rem; flex-wrap: wrap; }
.stat-item h3 { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 0.5rem; }
.stat-item p { color: var(--text-dim); }

footer {
  padding: 4rem 10%;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: #020617;
}
.footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 4rem; }
.footer-brand p { margin-top: 1rem; color: var(--text-dim); }
.footer-links h4 { margin-bottom: 1.5rem; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.8rem; }
.footer-links a { color: var(--text-dim); text-decoration: none; transition: color 0.3s; }
.footer-links a:hover { color: white; }
.qr-placeholder {
  width: 200px;
  height: 200px;
  background: white;
  padding: 10px;
  border-radius: 10px;
  margin-top: 1rem;
}

/* Button */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
  cursor: pointer;
  border: none;
  text-align: center;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); }
.btn:hover { opacity: 0.9; transform: translateY(-2px); }

/* ==========================================================================
   移动端适配核心代码 (Responsive Queries)
   ========================================================================== */
@media (max-width: 768px) {
  /* 导航栏适配 */
  nav {
    padding: 1rem 5%;
    flex-wrap: wrap;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 1rem;
    gap: 1rem;
  }
  
  .nav-links a {
    margin-left: 0;
    width: 100%;
    text-align: center;
    padding: 0.8rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
  }
  
  /* 点击汉堡菜单显示导航 */
  .nav-check:checked ~ .nav-links {
    display: flex;
  }

  /* 英雄标题 */
  .hero-title, .section-title {
    font-size: 28px !important;
    line-height: 1.3 !important;
  }
  .subtitle, .section-desc {
    font-size: 16px !important;
  }

  /* Section Padding */
  .section-padding {
    padding: 30px 1.5rem !important;
  }
  .container-padding {
    padding: 0 10px !important;
  }
  .octopus-section {
    padding: 0 1.5rem !important;
    margin-top: 4rem !important;
    gap: 3rem !important;
  }

  /* Grid 单列化 */
  .grid-2-cols, 
  .grid-3-cols, 
  .pricing-grid, 
  .footer-grid,
  .stats-grid {
    grid-template-columns: 1fr !important;
    padding: 0 !important;
    gap: 1.5rem;
  }

  /* Cards */
  .feature-card-style {
    flex-direction: column;
    text-align: left;
    padding: 24px;
  }
  .feature-icon-box { margin-bottom: 10px; }
  .case-card, .solution-card { padding: 20px; }
  .pricing-card.popular { transform: none; border-width: 1px; }
  .pricing-section { padding-left: 5%; padding-right: 5%; }

  /* Promo & Footer */
  .promo-stats { gap: 2rem; }
  .promo-title { font-size: 1.8rem; }
  .footer-grid { gap: 2rem; }
  footer { padding: 3rem 5%; }
  
  /* 表格样式微调 */
  .comparison-table th, .comparison-table td {
    padding: 1rem;
  }
}