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

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --green: #00ff88;
  --green-dim: #00cc6a;
  --green-glow: rgba(0, 255, 136, 0.15);
  --green-glow-strong: rgba(0, 255, 136, 0.3);
  --red: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.12);
  --yellow: #f59e0b;
  --yellow-bg: rgba(245, 158, 11, 0.12);
  --text: #e4e4e7;
  --text-dim: #a1a1aa;
  --text-muted: #71717a;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(0, 255, 136, 0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

img { max-width: 100%; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 按钮系统 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  white-space: nowrap;
  font-family: var(--font);
}

.btn-primary {
  background: var(--green);
  color: #000;
  box-shadow: 0 0 20px var(--green-glow);
}

.btn-primary:hover {
  background: #33ffaa;
  box-shadow: 0 0 30px var(--green-glow-strong);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  padding: 12px 16px;
}

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

.btn-block {
  width: 100%;
  justify-content: center;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ========== 弹窗 ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  position: relative;
  animation: modalIn 0.4s ease;
}

@keyframes modalIn {
  from { transform: scale(0.9) translateY(20px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.2s;
}

.modal-close:hover { color: var(--text); }

.modal-icon {
  margin-bottom: 16px;
}

.modal-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.modal-title {
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-btn {
  justify-content: center;
}

/* ========== 导航栏 ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--green);
  letter-spacing: 2px;
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--green);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-lang {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

/* ========== Hero 区域 ========== */
.hero {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--green-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.4;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--green);
  margin-bottom: 24px;
  opacity: 0.9;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #ccc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.hero-trial {
  font-size: 0.85rem;
  color: var(--green);
  font-weight: 500;
}

.hero-warn {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--green);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========== 终端提示条 ========== */
.terminal-bar {
  background: rgba(0, 255, 136, 0.05);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.terminal-prompt {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--green);
}

/* ========== 通用 Section ========== */
.section {
  padding: 100px 0;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 16px;
  text-align: center;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-dim);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
  line-height: 1.8;
}

/* ========== 风险警示区 ========== */
.threat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.threat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s ease;
  position: relative;
}

.threat-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 255, 136, 0.06);
}

.threat-icon {
  margin-bottom: 20px;
}

.threat-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.threat-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 16px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.badge-danger {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-warn {
  background: var(--yellow-bg);
  color: var(--yellow);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.system-notice {
  background: rgba(0, 255, 136, 0.04);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
  font-family: var(--font-mono);
}

.notice-prefix {
  color: var(--green);
  font-weight: 700;
}

/* ========== 使用截图展示 ========== */
.usage-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.usage-gallery img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  cursor: pointer;
}

.usage-gallery img:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 255, 136, 0.1);
}

@media (max-width: 768px) {
  .usage-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .usage-gallery {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ========== 图片灯箱 ========== */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--radius);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.lightbox.active .lightbox-img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  background: none;
  border: none;
  color: #fff;
  font-size: 36px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s;
  z-index: 2001;
}

.lightbox-close:hover { opacity: 1; }

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
  opacity: 0.7;
  transition: all 0.2s;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

@media (max-width: 768px) {
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-prev,
  .lightbox-next {
    width: 36px;
    height: 36px;
  }
}

/* ========== 核心能力区 ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
}

.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 255, 136, 0.06);
}

.feature-num {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 3rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.04);
  font-family: var(--font-mono);
  line-height: 1;
}

.feature-icon {
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ========== 工作原理区 ========== */
.how-it-works {
  background: linear-gradient(180deg, var(--bg) 0%, rgba(0, 255, 136, 0.02) 50%, var(--bg) 100%);
}

.steps {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--green), rgba(0, 255, 136, 0.1));
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 32px 0;
  position: relative;
}

.step-number {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--green);
  position: relative;
  z-index: 1;
  box-shadow: 0 0 20px var(--green-glow);
}

.step-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ========== 技术规格区 ========== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s ease;
}

.tech-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 255, 136, 0.06);
}

.tech-icon {
  margin-bottom: 16px;
}

.tech-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.tech-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ========== 终端代码块 ========== */
.terminal-block {
  background: #0c0c0c;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
}

.terminal-header {
  background: rgba(255, 255, 255, 0.04);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.terminal-code {
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--green);
  overflow-x: auto;
}

.terminal-code::-webkit-scrollbar {
  height: 6px;
}

.terminal-code::-webkit-scrollbar-track {
  background: transparent;
}

.terminal-code::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.code-comment { color: var(--text-muted); }
.code-bracket { color: #60a5fa; }
.code-danger { color: var(--red); font-weight: 700; }
.code-highlight { color: var(--green); font-weight: 600; }
.code-result { color: var(--green); font-weight: 700; }

/* ========== 用户反馈区 ========== */
.testimonials {
  background: linear-gradient(180deg, var(--bg) 0%, rgba(0, 255, 136, 0.02) 50%, var(--bg) 100%);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 24px;
  font-style: italic;
}

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

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--green-dim));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #000;
  font-size: 0.9rem;
}

.author-name {
  font-size: 0.9rem;
  font-weight: 600;
}

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

/* ========== 定价区 ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto 32px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  transition: all 0.3s ease;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.pricing-card--featured {
  border-color: var(--green);
  box-shadow: 0 0 40px var(--green-glow);
}

.pricing-card--featured:hover {
  box-shadow: 0 0 60px var(--green-glow-strong);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--green);
  color: #000;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 4px;
}

.pricing-plan {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 16px;
}

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

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text);
  font-family: var(--font-mono);
}

.price-unit {
  font-size: 1rem;
  color: var(--text-muted);
}

.pricing-save {
  font-size: 0.85rem;
  color: var(--green);
  margin-bottom: 24px;
}

.pricing-features {
  margin: 24px 0 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.pricing-trial {
  text-align: center;
  font-size: 0.85rem;
  color: var(--green);
  margin-top: 12px;
}

.pricing-warn {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.pricing-banner {
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid rgba(0, 255, 136, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px 24px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--green);
  max-width: 500px;
  margin: 0 auto;
}

/* ========== FAQ 区 ========== */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item.active {
  border-color: rgba(0, 255, 136, 0.2);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  font-family: var(--font);
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--green);
}

.faq-chevron {
  transition: transform 0.3s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--green);
}

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

.faq-item.active .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s;
}

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

.footer-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-trial {
  font-size: 0.8rem;
  color: var(--green);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 24px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  .hero { padding: 120px 0 60px; }

  .hero-title { font-size: 2rem; }

  .hero-stats { gap: 24px; }

  .stat-num { font-size: 1.5rem; }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .threat-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .tech-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .steps::before {
    left: 24px;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .pricing-card {
    padding: 28px;
  }

  .footer-actions {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .terminal-code {
    font-size: 0.7rem;
    padding: 16px;
  }
}

/* ========== 自定义滚动条 ========== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}