/* ============================================================
   Conflux Design System v2 — "Obsidian" 深色主题
   灵感来源: Raycast + Linear + CleanShot X
   ============================================================ */

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

:root {
  /* Background */
  --bg-base:        #0a0a0a;
  --bg-surface:     #111111;
  --bg-elevated:    #1a1a1a;
  --bg-overlay:     rgba(255, 255, 255, 0.04);

  /* Text */
  --text-primary:   #f5f5f5;
  --text-secondary: #b8b8b8;
  --text-tertiary:  #6e6e6e;
  --text-inverse:   #0a0a0a;

  /* Accent */
  --accent:         #e8e8e8;
  --accent-text:    #0a0a0a;
  --accent-subtle:  #3a7bd5;
  --accent-strong:  #fafafa;
  --success:        #28c840;
  --success-hover:  #2dd648;
  --danger:         #ff5f57;
  --bg-chrome:      #1c1c1e;

  /* Borders */
  --border-subtle:  rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.10);
  --border-strong:  rgba(255, 255, 255, 0.18);

  /* Shadows */
  --shadow-card:    0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-screenshot: 0 24px 80px rgba(0,0,0,0.6);
  --shadow-nav:     0 1px 0 rgba(255,255,255,0.06);

  /* Layout */
  --container:      1100px;

  /* Spacing scale (4pt grid) */
  --space-2xs: 4px;
  --space-xs:  8px;
  --space-sm:  12px;
  --space-md:  16px;
  --space-lg:  20px;
  --space-xl:  24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 64px;
  --space-5xl: 96px;
  --font-base:      -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
  --radius-sm:      8px;
  --radius:         10px;
  --radius-md:      12px;
  --radius-lg:      16px;
  --radius-xl:      20px;
  --radius-pill:    100px;
}/* ============================================================
   Conflux Design System v2 — "Obsidian" 深色主题
   灵感来源: Raycast + Linear + CleanShot X
   ============================================================ */

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

/* ============================================================
   Conflux Design System v2 — "Obsidian" 深色主题
   灵感来源: Raycast + Linear + CleanShot X
   ============================================================ */

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



html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

a { color: var(--text-secondary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--text-primary); }

/* ============================================================
   Keyframe Animations
   ============================================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Scroll Reveal
   ============================================================ */

/* fade-up: initial state set by JS (motion handles animation) */
/* .fade-up elements start at opacity:0, translateY(20px) via main.js */

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-base);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  border-radius: var(--radius);
  white-space: nowrap;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-base);
  padding: 12px 20px;
}
.btn-primary:hover {
  background: var(--accent-strong);
  color: var(--bg-base);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 12px 20px;
}
.btn-outline:hover {
  border-color: rgba(255,255,255,0.25);
  color: var(--text-primary);
}

.btn-accent {
  background: rgba(255,255,255,0.10);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 12px 20px;
}
.btn-accent:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.30);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 12px 20px;
  border: 1px solid var(--border-subtle);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-sm {
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  height: 30px;
}

.btn-lg {
  font-size: 15px;
  font-weight: 600;
  padding: 13px 26px;
}

/* ============================================================
   Navigation
   ============================================================ */

.top-bar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 56px;
  background: transparent;
  transition: background 0.25s, border-color 0.25s;
}

.top-bar.scrolled {
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
}
.logo-link:hover { color: var(--text-primary); }

.logo-img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--text-primary); }

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: var(--space-2xs);
  border-radius: 6px;
}
.menu-toggle:focus-visible,
.mobile-menu-close:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link {
  font-size: 24px;
  color: var(--text-primary);
}
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 28px;
  line-height: 1;
}

/* ============================================================
   Section Layout Helpers
   ============================================================ */

section { padding: 120px 0; }

.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: var(--space-sm);
  max-width: 520px;
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  padding: 80px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--bg-base));
  pointer-events: none;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-xl);
}

.hero h1 {
  font-size: clamp(38px, 6.5vw, 84px);
  font-weight: 700;
  line-height: 1.03;
  max-width: 100%;
  word-break: break-word;
  overflow-wrap: break-word;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  max-width: 700px;
  margin-bottom: var(--space-lg);
}

.hero-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 0;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
  flex-wrap: wrap;
  justify-content: center;
}

.hero-req {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: var(--space-md);
}

.hero-install-hint {
  margin-top: var(--space-lg);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.install-collapse {
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  background: rgba(255,255,255,0.02);
  text-align: left;
}

.install-collapse-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: color 0.15s;
  user-select: none;
  -webkit-user-select: none;
}
.install-collapse-toggle:hover { color: var(--text-primary); }

.install-collapse-chevron {
  flex-shrink: 0;
  margin-left: auto;
  transition: transform 0.3s ease;
}
.install-collapse.open .install-collapse-chevron {
  transform: rotate(180deg);
}

.install-collapse-panel {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition:
    grid-template-rows 320ms cubic-bezier(0.25, 0.1, 0.25, 1),
    opacity 240ms ease;
}
.install-collapse.open .install-collapse-panel {
  grid-template-rows: 1fr;
  opacity: 1;
}
.install-collapse-body {
  padding: 0 14px 14px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.7;
  min-height: 0;
  overflow: hidden;
}
.install-collapse-body p { margin: 0 0 6px; }
.install-collapse-body p:last-child { margin-bottom: 0; }
.install-collapse-body strong { color: var(--text-primary); }
.install-collapse-body ol { margin: 6px 0 0; padding-left: 18px; }
.install-collapse-body li { margin-bottom: var(--space-2xs); }
.install-collapse-body kbd {
  background: rgba(255,255,255,0.1);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 11px;
  font-family: -apple-system, sans-serif;
}

/* Screenshot */
.hero-screenshot {
  margin-top: 56px;
  width: 100%;
  max-width: 920px;
}

.screenshot-wrapper {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 40px 100px rgba(0,0,0,0.6),
    0 12px 30px rgba(0,0,0,0.35);
  transform: perspective(1200px) rotateX(1.5deg);
  transition: transform 0.4s ease;
}
.screenshot-wrapper:hover {
  transform: perspective(1200px) rotateX(0deg);
}

.screenshot-chrome {
  background: var(--bg-chrome);
  height: 28px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 7px;
  flex-shrink: 0;
}

.chrome-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-red    { background: var(--danger); }
.dot-yellow { background: #febc2e; }
.dot-green  { background: var(--success); }

.screenshot-wrapper img {
  width: 100%;
  display: block;
  vertical-align: bottom;
}

/* ============================================================
   Demo Video
   ============================================================ */

.demo { padding: 60px 0 0; }

.demo h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.demo-video-wrap {
  margin-top: var(--space-3xl);
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 40px 100px rgba(0,0,0,0.6),
    0 12px 30px rgba(0,0,0,0.35);
}

.demo-video-chrome {
  background: var(--bg-chrome);
  height: 28px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 7px;
  flex-shrink: 0;
}

.demo-video-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.demo-video-container {
  position: relative;
  background: var(--bg-base);
}

.demo-video-container video,
.demo-video-container img {
  width: 100%;
  display: block;
  vertical-align: bottom;
}

.demo-note {
  text-align: center;
  margin-top: var(--space-md);
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   Features
   ============================================================ */

.features { padding: 120px 0; }

.features h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: var(--space-3xl);
}

.feature-card {
  background: var(--bg-base);
  padding: 32px 28px;
  transition: background 0.15s;
}
.feature-card:hover { background: #0f0f0f; }

.feature-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ============================================================
   Platforms
   ============================================================ */

.platforms { padding: 120px 0; }

.platforms h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-3xl);
}

.platform-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: background 0.15s, border-color 0.15s;
}
.platform-card:hover {
  background: var(--bg-elevated);
  border-color: rgba(255,255,255,0.14);
}

.platform-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  opacity: 0.9;
}

.platform-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.platform-name-zh {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.platform-checks {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  margin-bottom: var(--space-sm);
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.check-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

.platform-detail {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================================
   Tech Stats
   ============================================================ */

.tech {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.tech-item {
  text-align: center;
  padding: 16px 24px;
  position: relative;
}
.tech-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 40px;
  width: 1px;
  background: rgba(255,255,255,0.08);
}

.tech-stat {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.0;
  letter-spacing: -0.02em;
}

.tech-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============================================================
   Social Proof / Testimonials
   ============================================================ */

.social-proof { padding: 120px 0; text-align: center; }

.social-proof h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 960px;
  margin: 48px auto 0;
}

.testimonial-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: left;
  transition: border-color 0.3s;
}

.testimonial-card:hover {
  border-color: var(--text-tertiary);
}

.testimonial-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 16px;
}

.testimonial-author {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* ============================================================
   Pricing
   ============================================================ */

.pricing { padding: 120px 0; text-align: center; }

.pricing h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.pricing-card {
  max-width: 420px;
  margin: 48px auto 0;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  text-align: left;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.pricing-card:hover {
  border-color: rgba(255,255,255,0.18);
}

.pricing-badge {
  display: inline-block;
  background: rgba(255,255,255,0.08);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-lg);
}

.pricing-amount {
  display: flex;
  align-items: flex-start;
  gap: 2px;
  color: var(--text-primary);
  line-height: 1.0;
  margin-bottom: 6px;
}

.currency {
  font-size: 28px;
  font-weight: 400;
  padding-top: 10px;
}

.price {
  font-size: clamp(56px, 7vw, 80px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.pricing-usd {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 28px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.10) url("data:image/svg+xml,%3Csvg width='10' height='8' viewBox='0 0 10 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 4L3.5 6.5L9 1' stroke='%23f5f5f5' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 10px no-repeat;
  border-radius: 50%;
}

#buy-license-btn {
  width: 100%;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius);
  background: var(--text-primary);
  color: var(--bg-base);
  border: none;
  cursor: pointer;
  font-family: var(--font-base);
  transition: background 0.15s;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
#buy-license-btn:hover { background: var(--accent-strong); }
#buy-license-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.pricing-note {
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 14px;
}

/* Payment Modal */
.payment-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.payment-modal.open {
  display: flex;
}

.payment-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.payment-modal-content {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 520px;
  width: calc(100% - 48px);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,0.6);
  text-align: center;
}

.payment-step h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.payment-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  line-height: 1.5;
}

.payment-step-hint {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

#step-waiting .payment-step-desc {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}

#step-waiting .payment-step-hint {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.62);
}

.payment-manual-note {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.6;
  padding: 12px 14px;
  margin: 16px 0 12px;
  background: rgba(255,170,60,0.08);
  border: 1px solid rgba(255,170,60,0.18);
  border-radius: var(--radius);
  text-align: left;
}

.payment-contact-btn {
  margin-top: var(--space-md);
}

#payment-email {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: var(--font-base);
  background: var(--bg-base);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s;
  margin-bottom: var(--space-md);
}
#payment-email:focus {
  border-color: rgba(255,255,255,0.25);
}
#payment-email:focus-visible {
  border-color: var(--text-primary);
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}
#payment-email::placeholder {
  color: var(--text-tertiary);
}

.payment-btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-base);
  background: var(--text-primary);
  color: var(--bg-base);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}
.payment-btn-primary:hover { background: var(--accent-strong); }
.payment-btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.payment-contact-email,
.payment-contact-email:visited,
.payment-contact-email:hover {
  color: var(--bg-base);
  -webkit-text-fill-color: var(--bg-base);
}

.payment-urge-hint {
  margin: 10px 0 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
  text-align: center;
}

.payment-btn-ghost {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-base);
  background: transparent;
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  margin-top: var(--space-xs);
  text-decoration: none;
  transition: color 0.15s;
}
.payment-btn-ghost:hover { color: var(--text-primary); }

#step-waiting .payment-btn-ghost,
#step-waiting .payment-btn-ghost:hover {
  color: rgba(255, 255, 255, 0.86);
}

/* QR Codes */
.qr-codes {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  margin-bottom: 28px;
}

.qr-code-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.qr-code-img {
  width: 200px;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.10);
  background: var(--accent-strong);
  object-fit: contain;
  padding: var(--space-2xs);
}

.qr-code-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Spinner */
.payment-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255,255,255,0.10);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Success icon */
.payment-success-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(40, 200, 64, 0.10);
  color: var(--success);
  border: 1px solid rgba(40, 200, 64, 0.20);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

/* Success step layout */
.payment-modal .license-box {
  text-align: left;
  margin-top: var(--space-lg);
  padding: var(--space-lg);
}

.payment-modal .license-box .license-label {
  margin-bottom: 10px;
}

.payment-modal .license-box .license-key {
  font-size: 15px;
  margin-bottom: var(--space-md);
  letter-spacing: 1px;
}

.payment-modal .license-box .copy-btn {
  margin-top: 0;
}

.payment-modal .result-steps {
  text-align: left;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-2xs);
  padding-left: var(--space-lg);
}

.payment-modal .result-steps li + li {
  margin-top: 2px;
}

#step-success .payment-step-hint {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xl);
}

#step-success .payment-btn-primary {
  margin-top: 0;
  background: var(--success);
  color: var(--accent-strong);
}
#step-success .payment-btn-primary:hover {
  background: var(--success-hover);
}

/* ============================================================
   Contact Modal
   ============================================================ */

.contact-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.contact-modal.open {
  display: flex;
}

.contact-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.contact-modal-content {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 36px 32px 28px;
  max-width: 420px;
  width: calc(100% - 48px);
  box-shadow: 0 24px 64px rgba(0,0,0,0.6);
}

.contact-modal-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2xs);
  text-align: center;
}

.contact-modal-desc {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.contact-modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 28px;
  cursor: pointer;
  line-height: 1;
  padding: var(--space-2xs);
  transition: color 0.15s;
}
.contact-modal-close:hover {
  color: var(--text-primary);
}

.contact-email-primary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  margin-bottom: 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(100,180,255,0.25);
  background: linear-gradient(135deg, rgba(80,150,255,0.12), rgba(80,150,255,0.04));
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.contact-email-primary:hover {
  border-color: rgba(100,180,255,0.45);
  background: linear-gradient(135deg, rgba(80,150,255,0.18), rgba(80,150,255,0.08));
}
.contact-email-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(100,180,255,0.15);
  color: rgb(130,190,255);
}
.contact-email-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.contact-email-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.contact-email-addr {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono, ui-monospace, monospace);
}

.contact-list-label {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 4px 0 8px;
  padding-left: 2px;
}

.contact-wechat-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 16px;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
}
.contact-wechat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}
.contact-wechat-qr {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--accent-strong);
  padding: 6px;
}
.contact-wechat-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 10px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
  text-decoration: none;
  color: inherit;
  transition: background 0.15s, border-color 0.15s;
}
.contact-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.12);
}

.contact-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.contact-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-id {
  font-size: 13px;
  color: var(--text-tertiary);
}

.contact-arrow {
  font-size: 22px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* ============================================================
   FAQ
   ============================================================ */

.faq { padding: 120px 0; }

.faq h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.faq-list {
  max-width: 680px;
  margin: 48px auto 0;
}

.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.faq-item:first-child { border-top: 1px solid rgba(255,255,255,0.07); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  gap: var(--space-md);
  transition: color 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--text-primary); }

.faq-chevron {
  flex-shrink: 0;
  color: var(--text-tertiary);
  transition: transform 0.2s ease;
  display: flex;
  align-items: center;
}
.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-item p {
  padding-bottom: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  animation: fadeIn 0.2s ease;
}

/* ============================================================
   Download
   ============================================================ */

.download { padding: 120px 0; text-align: center; }

.download h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.download-btn-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: var(--space-3xl);
  gap: 10px;
}

.download-main-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--text-primary);
  color: var(--bg-base);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-base);
  padding: 16px 32px;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.download-main-btn:hover {
  background: var(--accent-strong);
  color: var(--bg-base);
  transform: translateY(-1px);
}

.download-meta {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* Install Guide */
.install-guide {
  max-width: 560px;
  margin: 32px auto 0;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
}

.install-guide-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 14px 20px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.15s;
  user-select: none;
}
.install-guide-header:hover { color: var(--text-primary); }
.install-guide-icon { font-size: 16px; }
.install-guide-arrow { margin-left: auto; transition: transform 0.2s; font-size: 12px; }
.install-guide.open .install-guide-arrow { transform: rotate(180deg); }

.install-guide-body { display: none; padding: 0 20px 20px; }
.install-guide.open .install-guide-body { display: block; }

.install-guide-note { font-size: 13px; color: var(--text-tertiary); line-height: 1.7; margin: 0 0 16px; }

.install-steps { display: flex; flex-direction: column; gap: 14px; }
.install-step { display: flex; gap: var(--space-sm); align-items: flex-start; }
.step-num {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%;
  background: rgba(255,255,255,0.08); color: var(--text-primary);
  font-size: 13px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; margin-top: 2px;
}
.step-text strong { font-size: 14px; color: var(--text-primary); display: block; margin-bottom: 2px; }
.step-text p { font-size: 13px; color: var(--text-tertiary); margin: 0; line-height: 1.6; }

.install-guide-alt {
  font-size: 13px; color: var(--text-tertiary); margin: 16px 0 0;
  padding-top: 14px; border-top: 1px solid rgba(255,255,255,0.06); line-height: 1.6;
}
.install-guide-alt kbd {
  background: rgba(255,255,255,0.1); padding: 2px 6px; border-radius: 4px;
  font-size: 12px; font-family: -apple-system, sans-serif;
}

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  margin-bottom: var(--space-xl);
}

.footer-brand strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2xs);
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   Legal Pages (Privacy, Terms)
   ============================================================ */

.legal {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 28px 120px;
}

.legal h1 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.legal .date {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-3xl);
}

.legal h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: var(--space-sm);
}

.legal p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.legal ul,
.legal ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.legal li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.legal a {
  color: var(--accent-subtle);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal a:hover {
  color: var(--text-primary);
}

/* ============================================================
   Payment Pages
   ============================================================ */

.result-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  background: var(--bg-base);
}

.result-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

.result-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
}
.result-icon.success {
  background: rgba(40, 200, 64, 0.12);
  color: var(--success);
  border: 1px solid rgba(40, 200, 64, 0.25);
}
.result-icon.cancel {
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.10);
}

.result-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.result-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.loading p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.license-box {
  background: var(--bg-base);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
  text-align: left;
}

.license-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-xs);
}

.license-key {
  font-family: "SF Mono", "Monaco", "Fira Code", monospace;
  font-size: 14px;
  color: var(--text-primary);
  word-break: break-all;
  margin-bottom: 14px;
  line-height: 1.5;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.10);
  font-family: var(--font-base);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.copy-btn:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); }
.copy-btn.copied { background: rgba(40,200,64,0.12); color: var(--success); border-color: rgba(40,200,64,0.2); }

.result-steps {
  list-style: none;
  text-align: left;
  margin-bottom: var(--space-xl);
  counter-reset: steps;
}
.result-steps li {
  counter-increment: steps;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.result-steps li:last-child { border-bottom: none; }
.result-steps li::before {
  content: counter(steps);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-top: 1px;
}

.error-msg {
  font-size: 14px;
  color: var(--danger);
  background: rgba(255, 95, 87, 0.08);
  border: 1px solid rgba(255, 95, 87, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: var(--space-md);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 800px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 2fr); }
  .tech-item:nth-child(2)::after { display: none; }
  .tech-item:nth-child(2) { border-right: none; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  section { padding: 80px 0; }

  .top-bar-right .nav-link { display: none; }
  .top-bar-right .btn-sm { display: none; }
  .menu-toggle { display: flex; }

  .hero { padding: 60px 0 80px; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; justify-content: center; }

  .screenshot-wrapper {
    transform: none;
  }
  .screenshot-wrapper:hover { transform: none; }

  .feature-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-item:nth-child(2)::after { display: none; }
  .tech-item:nth-child(4)::after { display: none; }
  .tech-item:nth-child(odd)::after { display: block; }
  .tech-item:nth-child(even)::after { display: none; }

  .pricing-card { padding: 28px 24px; }

  .footer-top {
    flex-direction: column;
    gap: var(--space-xl);
  }
  .footer-links {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .result-card { padding: 32px 24px; }

  .payment-modal-content { padding: 28px 20px; }
  .qr-codes { gap: var(--space-sm); }
  .qr-code-img { width: 160px; }

  .contact-modal-content { padding: 28px 20px 20px; }
  .contact-item { padding: 12px 14px; }
}