/* ============================================================
   DIY装机助手 — H5 PC官网 样式表
   设计方向: 暗黑科技风 / Neon Circuit
   ============================================================ */

/* ==================== CSS Variables ==================== */
:root {
  --bg-deep: #05050d;
  --bg-primary: #0a0a16;
  --bg-secondary: #0e0e1f;
  --bg-card: #12122a;
  --bg-card-hover: #181835;
  --bg-input: #0c0c20;

  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-default: rgba(255, 255, 255, 0.07);
  --border-active: rgba(0, 229, 255, 0.25);

  --cyan: #00e5ff;
  --cyan-dim: #00b8d4;
  --cyan-glow: rgba(0, 229, 255, 0.15);
  --cyan-glow-strong: rgba(0, 229, 255, 0.3);
  --purple: #7c3aed;
  --purple-dim: #6d28d9;
  --purple-glow: rgba(124, 58, 237, 0.15);
  --green: #00e676;
  --red: #ff5252;
  --orange: #ffab40;

  --text-primary: #e8e8f4;
  --text-secondary: #9a9ab8;
  --text-tertiary: #5e5e82;
  --text-dim: #3e3e5a;

  --font-display: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: var(--bg-deep);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

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

img {
  max-width: 100%;
  display: block;
}

ul { list-style: none; }

/* ==================== Particle Canvas ==================== */
.particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.25;
}

/* ==================== Utility ==================== */
.text-gradient {
  background: linear-gradient(135deg, var(--cyan) 0%, #8b5cf6 50%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

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

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border-active);
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: var(--cyan-glow);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  line-height: 1.2;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  outline: none;
  white-space: nowrap;
  font-family: var(--font-body);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #06b6d4);
  color: #05050d;
  box-shadow: 0 0 30px var(--cyan-glow), 0 4px 20px rgba(0, 229, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px var(--cyan-glow-strong), 0 8px 32px rgba(0, 229, 255, 0.3);
}

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

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

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
}

.btn svg {
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ==================== Navbar ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 22, 0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-svg {
  height: 38px;
  width: auto;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.nav-brand:hover .nav-logo-svg {
  color: var(--cyan);
}

.nav-menu {
  display: flex;
  gap: 4px;
}

.nav-link {
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
  color: var(--cyan);
  background: var(--cyan-glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ==================== Hero Section ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 70%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}

.hero-glow-1 {
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--cyan);
  opacity: 0.05;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(0, 229, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-title {
  margin-bottom: 28px;
}

.title-line {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-primary);
}

.title-accent {
  background: linear-gradient(135deg, var(--cyan) 0%, #8b5cf6 60%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 48px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.5px;
}

.hero-stat-highlight .stat-value {
  font-size: 2.4rem;
  color: var(--green);
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

/* Phone Mockup */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-mockup {
  position: relative;
  z-index: 1;
}

.phone-frame {
  width: 280px;
  height: 570px;
  background: linear-gradient(160deg, #1a1a35, #0d0d1f);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 40px;
  padding: 14px;
  position: relative;
  box-shadow:
    0 0 60px rgba(0, 229, 255, 0.1),
    0 20px 80px rgba(0, 0, 0, 0.6);
  transition: transform var(--transition-slow);
}

.phone-frame:hover {
  transform: translateY(-8px);
}

.phone-notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 24px;
  background: #05050d;
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #08081a;
  border-radius: 28px;
  overflow: hidden;
  padding: 20px 14px;
}

.phone-app {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 10px;
}
.phone-status-bar {
  display: flex;
  justify-content: space-between;
  padding: 2px 6px 4px;
  font-size: 9px;
  color: #aaa;
}
.phone-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 2px;
}
.pnb-back { color: #999; font-size: 13px; }
.pnb-title { color: #fff; font-size: 12px; font-weight: 700; }
.pnb-action { color: #666; font-size: 11px; font-weight: 700; }
.phone-search {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.04);
  border-radius: 14px;
  padding: 6px 10px;
  margin-bottom: 2px;
}
.ps-icon { font-size: 10px; opacity: 0.5; }
.ps-text { font-size: 10px; color: #555; }
.phone-categories {
  display: flex;
  gap: 4px;
  padding: 4px 0;
  overflow: hidden;
}
.pcat {
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 9px;
  color: #777;
  background: rgba(255,255,255,0.03);
  white-space: nowrap;
}
.pcat.active {
  background: rgba(0, 229, 255, 0.12);
  color: var(--cyan);
  font-weight: 600;
}
.phone-comp-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 8px 10px;
}
.phone-comp-card-dim { opacity: 0.65; }
.phone-comp-card-dim .pcc-name { color: #888; }
.pcc-top {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}
.pcc-brand { font-size: 10px; color: #999; }
.pcc-tag {
  font-size: 7px;
  padding: 1px 6px;
  border-radius: 6px;
  background: rgba(124, 58, 237, 0.2);
  color: var(--purple);
  font-weight: 600;
}
.pcc-tag-green { background: rgba(0, 230, 118, 0.15); color: var(--green); }
.pcc-price {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
}
.pcc-name {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: #ddd;
  margin-bottom: 4px;
}
.pcc-specs {
  display: flex;
  gap: 5px;
  margin-bottom: 6px;
}
.pcc-specs span {
  font-size: 7px;
  color: #666;
  background: rgba(255,255,255,0.03);
  padding: 1px 5px;
  border-radius: 3px;
}
.pcc-footer {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 4px;
}
.pcc-selected { font-size: 9px; color: var(--cyan); }
.pcc-tap { font-size: 9px; color: #555; }
.phone-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #14142d;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 8px 10px;
  margin-top: 2px;
}
.pbb-info { display: flex; flex-direction: column; gap: 1px; }
.pbb-count { font-size: 9px; color: #aaa; }
.pbb-total { font-size: 14px; font-weight: 800; color: var(--cyan); }
.pbb-btn {
  font-size: 10px;
  color: #05050d;
  background: var(--cyan);
  padding: 5px 12px;
  border-radius: 14px;
  font-weight: 700;
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  animation: bounce-down 2s ease-in-out infinite;
}

@keyframes bounce-down {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ==================== Data Strip ==================== */
.data-strip {
  position: relative;
  z-index: 2;
  background: rgba(14, 14, 31, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 28px 0;
}

.data-strip-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
}

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

.data-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.5px;
}

.data-desc {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.data-divider {
  width: 1px;
  height: 40px;
  background: var(--border-default);
}

/* ==================== Features ==================== */
.features {
  padding: 120px 0;
  position: relative;
  background: var(--bg-deep);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-base);
  overflow: hidden;
}

.feature-card-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--cyan-glow), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: 0 8px 40px rgba(0, 229, 255, 0.08);
}

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

.feature-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--cyan-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.feature-icon {
  width: 32px;
  height: 32px;
  color: var(--cyan);
}

.feature-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.feature-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.feature-tags span {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  background: rgba(255, 255, 255, 0.03);
  padding: 3px 10px;
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

/* ==================== Workflow ==================== */
.workflow {
  padding: 120px 0;
  position: relative;
  background: var(--bg-primary);
}

.workflow-steps {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.workflow-line {
  position: absolute;
  top: 56px;
  left: 60px;
  right: 60px;
  height: 1px;
  background: var(--border-default);
  z-index: 0;
}

.workflow-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: 0 0 20px var(--cyan-glow-strong);
}

.workflow-items {
  display: flex;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.workflow-item {
  text-align: center;
  width: 160px;
}

.workflow-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 16px;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.workflow-item:hover .workflow-num {
  opacity: 1;
}

.workflow-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: all var(--transition-base);
}

.workflow-item:hover .workflow-icon-wrap {
  border-color: var(--border-active);
  box-shadow: 0 0 30px var(--cyan-glow);
}

.wf-icon {
  width: 28px;
  height: 28px;
  color: var(--cyan);
}

.workflow-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.workflow-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== Showcase ==================== */
.showcase {
  padding: 120px 0;
  background: var(--bg-deep);
}

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

.showcase-card {
  position: relative;
}

.showcase-card-inner {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-base);
  height: 100%;
}

.showcase-card:hover .showcase-card-inner {
  border-color: var(--border-active);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 229, 255, 0.06);
}

.showcase-card.featured .showcase-card-inner {
  border-color: var(--border-active);
  background: linear-gradient(160deg, rgba(0, 229, 255, 0.04), rgba(124, 58, 237, 0.04));
}

.showcase-card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff;
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  z-index: 2;
  box-shadow: 0 4px 20px var(--cyan-glow-strong);
}

.showcase-card-tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.showcase-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.showcase-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.showcase-spec {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.ss-label {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-family: var(--font-display);
  font-weight: 600;
}

.ss-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.showcase-price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-default);
}

.showcase-price {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--cyan);
}

.showcase-score {
  font-size: 0.8rem;
  color: var(--purple);
  background: var(--purple-glow);
  padding: 4px 10px;
  border-radius: 50px;
  font-weight: 600;
}

/* ==================== Pitfalls ==================== */
.pitfalls {
  padding: 120px 0;
  background: var(--bg-primary);
}

.pitfall-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.pitfall-item:nth-child(7) {
  grid-column: span 3;
  max-width: 400px;
  justify-self: center;
}

.pitfall-item {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-base);
}

.pitfall-item:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.pitfall-level {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 12px;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pitfall-level.danger  { background: rgba(255, 82, 82, 0.1); color: var(--red); }
.pitfall-level.warning { background: rgba(255, 171, 64, 0.1); color: var(--orange); }
.pitfall-level.info    { background: rgba(0, 229, 255, 0.08); color: var(--cyan); }

.pitfall-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.pitfall-content p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==================== Download ==================== */
.download {
  padding: 120px 0;
  position: relative;
  background: var(--bg-deep);
  overflow: hidden;
}

.download-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--cyan-glow), transparent 70%);
  pointer-events: none;
}

.download-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.download-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
  color: var(--text-primary);
}

.download-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.download-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.download-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.dl-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0, 230, 118, 0.1);
  color: var(--green);
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

.download-qr {
  display: flex;
  justify-content: center;
}

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

.qr-code {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: inline-block;
  margin-bottom: 20px;
  box-shadow: 0 0 40px rgba(0, 229, 255, 0.05);
}

.qr-code-img {
  display: block;
  width: 200px;
  height: 200px;
  border-radius: 0;
}

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

.qr-tip {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.qr-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan);
}

/* ==================== Cooperation ==================== */
.cooperation {
  padding: 120px 0;
  background: var(--bg-primary);
}

.coop-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}

.coop-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-base);
}

.coop-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: 0 8px 40px rgba(124, 58, 237, 0.06);
}

.coop-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  color: var(--cyan);
}

.coop-icon svg {
  width: 48px;
  height: 48px;
}

.coop-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.coop-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact */
.coop-contact {
  max-width: 700px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.contact-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.contact-card > p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.contact-methods {
  margin-bottom: 28px;
}

.contact-phone-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: rgba(0, 229, 255, 0.04);
  border: 1px solid var(--border-active);
  border-radius: 50px;
}

.contact-label {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.contact-phone {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 1px;
  transition: color var(--transition-fast);
}

.contact-phone:hover {
  color: var(--purple);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}

.form-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235e5e82' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
}

select.form-input option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form .btn {
  align-self: center;
  margin-top: 8px;
}

/* ==================== Pricing ==================== */
.pricing {
  padding: 120px 0;
  background: var(--bg-primary);
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
}

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

.pricing-featured {
  border-color: var(--border-active);
  background: linear-gradient(160deg, rgba(0, 229, 255, 0.04), rgba(124, 58, 237, 0.04));
  transform: scale(1.04);
  z-index: 1;
}

.pricing-featured:hover {
  transform: scale(1.04) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff;
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  z-index: 2;
  box-shadow: 0 4px 20px var(--cyan-glow-strong);
}

.pricing-icon {
  font-size: 2.2rem;
  margin-bottom: 8px;
  display: block;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.pricing-amount {
  margin-bottom: 24px;
}

.pricing-free {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--cyan);
}

.pricing-price {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--cyan);
}

.pricing-period {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-left: 4px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex: 1;
}

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

.pricing-features .pricing-disabled {
  opacity: 0.4;
}

.pf-check {
  color: var(--green);
  font-weight: 700;
  font-size: 0.85rem;
  width: 20px;
  flex-shrink: 0;
}

.pf-cross {
  color: var(--red);
  font-weight: 700;
  font-size: 0.85rem;
  width: 20px;
  flex-shrink: 0;
}

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

/* Contact remark */
.contact-remark {
  margin-top: 16px;
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

/* Form related - hide unused */
.contact-form,
.form-fields,
.contact-methods .contact-form,
.form-input,
.form-textarea,
.form-success,
.contact-form .btn {
  display: none;
}

/* ==================== CTA Banner ==================== */
.cta-banner {
  padding: 100px 0;
  position: relative;
  background: var(--bg-deep);
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.06), transparent 70%);
  pointer-events: none;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
  color: var(--text-primary);
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

/* ==================== Footer ==================== */
.footer {
  padding: 60px 0 30px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-logo-svg {
  height: 34px;
  width: auto;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-brand-desc {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--cyan);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-dim);
  font-size: 0.8rem;
}

.footer-bottom a {
  color: var(--text-dim);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: var(--cyan);
}

/* ==================== Back to Top ==================== */
.back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 4px 20px var(--cyan-glow);
}

/* ==================== Reveal Animations ==================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== Form Success ==================== */
.form-success {
  background: rgba(0, 230, 118, 0.08);
  border: 1px solid rgba(0, 230, 118, 0.2);
  color: var(--green);
  padding: 20px 32px;
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 600;
  font-size: 1rem;
}

/* ==================== Responsive ==================== */
@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-card:last-child { grid-column: span 2; max-width: 400px; justify-self: center; }
  .coop-grid { grid-template-columns: repeat(2, 1fr); }
  .pitfall-grid { grid-template-columns: repeat(2, 1fr); }
  .pitfall-item:nth-child(7) { grid-column: span 2; }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (max-width: 860px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; gap: 60px; }
  .hero-visual { order: -1; }
  .hero-subtitle { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-floating-elements { display: none; }
  .data-strip-inner { gap: 32px; }
  .workflow-items { flex-wrap: wrap; justify-content: center; gap: 40px; }
  .workflow-line { display: none; }
  .download-wrapper { grid-template-columns: 1fr; text-align: center; }
  .download-list li { justify-content: center; }
  .features-grid,
  .showcase-grid,
  .coop-grid { grid-template-columns: 1fr; }
  .showcase-card:last-child { grid-column: span 1; max-width: 100%; }
  .form-fields { grid-template-columns: 1fr; }
  .footer-grid { flex-direction: column; gap: 40px; }
  .footer-links { gap: 40px; flex-wrap: wrap; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .pitfall-grid { grid-template-columns: 1fr; }
  .pitfall-item:nth-child(7) { grid-column: span 1; max-width: 100%; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .pricing-featured { transform: none; }
  .pricing-featured:hover { transform: translateY(-4px); }
}

@media (max-width: 640px) {
  .section-container { padding: 0 20px; }
  .navbar-inner { padding: 0 20px; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 300px;
    height: 100vh;
    background: rgba(10, 10, 22, 0.97);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    flex-direction: column;
    padding: 100px 32px 40px;
    gap: 4px;
    transition: right 0.4s ease;
    border-left: 1px solid var(--border-default);
    z-index: 999;
  }
  .nav-menu.active { right: 0; }
  .nav-menu a {
    font-size: 1.1rem;
    padding: 14px 20px;
    display: block;
    border-radius: var(--radius-md);
  }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .nav-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  .hero-stats { gap: 24px; }
  .stat-value { font-size: 1.6rem; }
  .data-strip-inner { flex-wrap: wrap; gap: 20px; }
  .data-divider { display: none; }
  .section-title { font-size: 1.6rem; }
  .hero-scroll-hint { display: none; }
}