/* IDM下载器官网样式 */

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

:root {
  --primary: #0d6e3f;
  --primary-dark: #094d2c;
  --primary-light: #12a85a;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --bg-dark: #0a1628;
  --bg-section: #f8fafb;
  --bg-white: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #ffffff;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  height: auto;
}

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

/* ========== Header / Nav ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}

.nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

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

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

.nav-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.nav-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(13,110,63,0.3);
}

.nav-btn::after {
  display: none !important;
}

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

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ========== Hero Section ========== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, #f0faf4 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(13,110,63,0.06) 0%, transparent 70%);
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(13,110,63,0.08);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.hero h1 .green {
  color: var(--primary);
}

.hero .subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 500;
}

.hero .desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 14px 36px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(13,110,63,0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(13,110,63,0.35);
}

.btn-primary svg {
  width: 20px;
  height: 20px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  border: 2px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.hero-stats .stat {
  text-align: left;
}

.hero-stats .stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}

.hero-stats .stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-visual {
  flex: 1;
  position: relative;
}

.hero-mockup {
  background: var(--bg-dark);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.mockup-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.mockup-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mockup-bar span:nth-child(1) { background: #ff5f56; }
.mockup-bar span:nth-child(2) { background: #ffbd2e; }
.mockup-bar span:nth-child(3) { background: #27c93f; }

.mockup-content {
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.mockup-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.mockup-row:last-child {
  border-bottom: none;
}

.mockup-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.mockup-icon.zip { background: rgba(99,102,241,0.2); color: #818cf8; }
.mockup-icon.video { background: rgba(239,68,68,0.2); color: #f87171; }
.mockup-icon.audio { background: rgba(236,72,153,0.2); color: #f472b6; }
.mockup-icon.exe { background: rgba(34,197,94,0.2); color: #4ade80; }

.mockup-info {
  flex: 1;
}

.mockup-name {
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  font-weight: 500;
}

.mockup-size {
  color: rgba(255,255,255,0.35);
  font-size: 11px;
}

.mockup-progress {
  width: 120px;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
}

.mockup-progress .bar {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  animation: progress 3s infinite;
}

@keyframes progress {
  0% { width: 30%; }
  50% { width: 85%; }
  100% { width: 100%; }
}

.mockup-speed {
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

/* ========== Features ========== */
.features {
  padding: 100px 0;
  background: var(--bg-white);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header .label {
  display: inline-block;
  background: rgba(13,110,63,0.08);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

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

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(13,110,63,0.15);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
}

.feature-icon.green { background: rgba(13,110,63,0.1); color: var(--primary); }
.feature-icon.blue { background: rgba(59,130,246,0.1); color: #3b82f6; }
.feature-icon.purple { background: rgba(139,92,246,0.1); color: #8b5cf6; }
.feature-icon.orange { background: rgba(245,158,11,0.1); color: #f59e0b; }
.feature-icon.red { background: rgba(239,68,68,0.1); color: #ef4444; }
.feature-icon.teal { background: rgba(20,184,166,0.1); color: #14b8a6; }

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========== Download Types ========== */
.download-types {
  padding: 100px 0;
  background: var(--bg-section);
}

.types-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.type-card {
  text-align: center;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px 16px;
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.type-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
}

.type-icon.zip { background: linear-gradient(135deg, #818cf8, #6366f1); color: white; }
.type-icon.video { background: linear-gradient(135deg, #f87171, #ef4444); color: white; }
.type-icon.audio { background: linear-gradient(135deg, #f472b6, #ec4899); color: white; }
.type-icon.exe { background: linear-gradient(135deg, #4ade80, #22c55e); color: white; }
.type-icon.doc { background: linear-gradient(135deg, #60a5fa, #3b82f6); color: white; }

.type-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.type-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== How to Use / Tutorial Article ========== */
.how-to-use {
  padding: 100px 0;
  background: var(--bg-white);
}

.tutorial-article {
  max-width: 860px;
  margin: 0 auto;
}

/* 章节 */
.tutorial-chapter {
  margin-bottom: 48px;
}

.tutorial-chapter:last-child {
  margin-bottom: 0;
}

.chapter-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--border);
}

.chapter-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chapter-icon.install {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}

.chapter-icon.basic {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: white;
}

.chapter-icon.media {
  background: linear-gradient(135deg, #8b5cf6, #a78bfa);
  color: white;
}

.chapter-icon.batch {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: white;
}

.chapter-icon.settings {
  background: linear-gradient(135deg, #14b8a6, #5eead4);
  color: white;
}

.chapter-header h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* 步骤列表 */
.step-list {
  list-style: none;
  counter-reset: step-counter;
}

.step-list li {
  position: relative;
  padding: 18px 20px 18px 62px;
  margin-bottom: 12px;
  background: var(--bg-section);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.step-list li:hover {
  border-color: rgba(13,110,63,0.15);
  background: rgba(13,110,63,0.03);
}

.step-list li::before {
  counter-increment: step-counter;
  content: counter(step-counter);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-list li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.step-list li .key {
  display: inline-block;
  background: #e2e8f0;
  color: var(--text-primary);
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 13px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  border: 1px solid #cbd5e1;
  white-space: nowrap;
}

/* 提示框 */
.tutorial-tip {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  background: rgba(245,158,11,0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.tutorial-tip .tip-icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 1.6;
}

.tutorial-tip strong {
  color: var(--text-primary);
}

.tutorial-tip .key {
  display: inline-block;
  background: #fef3c7;
  color: #92400e;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 13px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  border: 1px solid #fde68a;
  white-space: nowrap;
}

/* 子标题段落 */
.tutorial-subsection {
  margin-bottom: 32px;
}

.tutorial-subsection:last-child {
  margin-bottom: 0;
}

.subsection-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-left: 2px;
}

.subsection-title .sub-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.subsection-title .sub-dot.green { background: var(--primary); }
.subsection-title .sub-dot.blue { background: #3b82f6; }
.subsection-title .sub-dot.purple { background: #8b5cf6; }
.subsection-title .sub-dot.amber { background: #f59e0b; }
.subsection-title .sub-dot.teal { background: #14b8a6; }

/* 设置项列表 */
.setting-list {
  list-style: none;
  padding: 0;
}

.setting-list li {
  position: relative;
  padding: 14px 18px 14px 18px;
  margin-bottom: 10px;
  background: var(--bg-section);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.setting-list li strong {
  color: var(--text-primary);
  font-weight: 600;
}

.setting-list li .key {
  display: inline-block;
  background: #e2e8f0;
  color: var(--text-primary);
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 13px;
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  border: 1px solid #cbd5e1;
  white-space: nowrap;
}

/* 分隔线 */
.chapter-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 48px 0;
}

/* 响应式 */
@media (max-width: 768px) {
  .chapter-header h3 {
    font-size: 19px;
  }

  .step-list li {
    padding: 14px 16px 14px 52px;
    font-size: 14px;
  }

  .step-list li::before {
    width: 26px;
    height: 26px;
    font-size: 12px;
    left: 14px;
  }
}

/* ========== Application Areas ========== */
.areas {
  padding: 100px 0;
  background: var(--bg-section);
}

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

.area-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.area-img {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.area-img.games { background: linear-gradient(135deg, #1e1b4b, #312e81); }
.area-img.movies { background: linear-gradient(135deg, #7c2d12, #c2410c); }
.area-img.software { background: linear-gradient(135deg, #064e3b, #047857); }
.area-img.education { background: linear-gradient(135deg, #1e3a5f, #1d4ed8); }
.area-img.news { background: linear-gradient(135deg, #4a1942, #9333ea); }
.area-img.books { background: linear-gradient(135deg, #3b0764, #7c3aed); }

.area-body {
  padding: 20px;
}

.area-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.area-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== Cloud Download Section ========== */
.cloud-download {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--bg-dark), #0f2440);
  color: white;
  position: relative;
  overflow: hidden;
}

.cloud-download::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18,168,90,0.15) 0%, transparent 70%);
}

.cloud-download .section-header .label {
  background: rgba(18,168,90,0.2);
  color: var(--primary-light);
}

.cloud-download .section-header h2 {
  color: white;
}

.cloud-download .section-header p {
  color: rgba(255,255,255,0.6);
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.dl-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  text-align: center;
}

.dl-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(18,168,90,0.3);
  transform: translateY(-4px);
}

.dl-card .dl-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.dl-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: white;
}

.dl-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
  line-height: 1.6;
}

.dl-card .dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 28px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.dl-btn.green {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}

.dl-btn.green:hover {
  box-shadow: 0 4px 20px rgba(18,168,90,0.4);
}

.dl-btn.outline {
  background: transparent;
  color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.2);
}

.dl-btn.outline:hover {
  border-color: rgba(255,255,255,0.5);
  color: white;
}

.cloud-note {
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 13px;
}

/* ========== FAQ ========== */
.faq {
  padding: 100px 0;
  background: var(--bg-white);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(13,110,63,0.2);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-white);
  transition: var(--transition);
  border: none;
  width: 100%;
  text-align: left;
}

.faq-q:hover {
  background: var(--bg-section);
}

.faq-q .icon {
  font-size: 20px;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.open .faq-q .icon {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-a {
  max-height: 300px;
}

.faq-a-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  color: var(--primary);
  padding: 16px 40px;
  border-radius: 50px;
  font-size: 17px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0,0,0,0.2);
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.6);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
}

.footer-brand .logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 14px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  color: white;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

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

.footer-col ul li a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.footer-seo {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-seo p {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  line-height: 1.8;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 38px;
  }

  .hero-visual {
    display: none;
  }

  .hero-inner {
    justify-content: center;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

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

  .types-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .hero h1 {
    font-size: 30px;
  }

  .hero .subtitle {
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-stats {
    gap: 24px;
  }

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

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

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .steps-grid::before {
    display: none;
  }

  .download-cards {
    grid-template-columns: 1fr;
  }

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

  .section-header h2 {
    font-size: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ========== Animations ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}