/* ==========================================================================
   FxSound 官方推广网站 - 主样式表
   配色：深色基底 + 橙色品牌色（基于 logo 识别）
   风格：扁平、现代、专业
   ========================================================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand colors */
  --color-orange: #FF6B35;
  --color-orange-hover: #FF8555;
  --color-orange-light: #FFB088;
  --color-orange-dark: #E55A2B;
  --color-orange-glow: rgba(255, 107, 53, 0.35);

  /* Dark backgrounds */
  --color-bg: #0A0A0F;
  --color-bg-2: #14141A;
  --color-bg-3: #1C1C24;
  --color-bg-4: #24242E;
  --color-card: #16161D;
  --color-card-hover: #1E1E27;

  /* Text */
  --color-text: #FFFFFF;
  --color-text-2: #B4B4C0;
  --color-text-3: #6B6B7E;
  --color-text-4: #4A4A5A;

  /* Borders */
  --color-border: #2A2A35;
  --color-border-light: #3A3A48;

  /* Functional */
  --color-success: #22C55E;
  --color-warning: #F59E0B;
  --color-info: #3B82F6;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Spacing & sizing */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
  --shadow-orange: 0 8px 32px rgba(255, 107, 53, 0.25);

  /* Transitions */
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { outline: none } 
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-size: 16px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }

::selection { background: var(--color-orange); color: #fff; }

/* ---------- Container & Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; position: relative; }
.section-sm { padding: 64px 0; }
.section-lg { padding: 128px 0; }

.section-header { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-header .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: rgba(255, 107, 53, 0.1);
  color: var(--color-orange);
  font-size: 13px; font-weight: 600; letter-spacing: 0.5px;
  text-transform: uppercase;
  border: 1px solid rgba(255, 107, 53, 0.2);
  margin-bottom: 20px;
}
.section-header h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-header p {
  font-size: 17px;
  color: var(--color-text-2);
  line-height: 1.7;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px; font-weight: 600;
  letter-spacing: 0.2px;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-orange);
  color: #fff;
  box-shadow: var(--shadow-orange);
}
.btn-primary:hover {
  background: var(--color-orange-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255, 107, 53, 0.4);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}
.btn-ghost {
  color: var(--color-text-2);
  background: transparent;
}
.btn-ghost:hover { color: var(--color-orange); }
.btn-lg { padding: 18px 36px; font-size: 17px; }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(10, 10, 15, 0.95); }

.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand img { height: 32px; width: auto; }
.nav-brand .brand-text { font-size: 20px; font-weight: 800; letter-spacing: -0.5px; }
.nav-brand .brand-text .accent { color: var(--color-orange); }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  padding: 8px 16px;
  font-size: 15px; font-weight: 500;
  color: var(--color-text-2);
  border-radius: var(--radius-sm);
}
.nav-menu a:hover, .nav-menu a.active { color: var(--color-text); background: rgba(255, 255, 255, 0.05); }
.nav-menu a.active { color: var(--color-orange); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span {
  width: 24px; height: 2px; background: var(--color-text);
  transition: var(--transition); border-radius: 2px;
}
.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(7px, -7px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 160px 0 96px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 800px 600px at 20% 20%, rgba(255, 107, 53, 0.15), transparent 60%),
    radial-gradient(ellipse 600px 500px at 80% 80%, rgba(255, 107, 53, 0.08), transparent 60%);
}
.hero-bg::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.hero .container { position: relative; z-index: 1; }

.hero-inner {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center;
}
.hero-content .badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: rgba(255, 107, 53, 0.1);
  color: var(--color-orange);
  font-size: 13px; font-weight: 600;
  border: 1px solid rgba(255, 107, 53, 0.25);
  margin-bottom: 24px;
}
.hero-content .badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 8px var(--color-orange);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-content h1 {
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  margin-bottom: 24px;
}
.hero-content h1 .accent { color: var(--color-orange); }
.hero-content .subtitle {
  font-size: 19px;
  color: var(--color-text-2);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 32px; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 24px;
  padding-top: 24px; border-top: 1px solid var(--color-border);
  font-size: 14px; color: var(--color-text-3);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--color-orange); }

/* Hero visual */
.hero-visual { position: relative; }
.hero-mockup {
  background: linear-gradient(135deg, var(--color-bg-3), var(--color-bg-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.hero-mockup .mockup-header {
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 16px; border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}
.hero-mockup .mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
.hero-mockup .dot-r { background: #FF5F57; }
.hero-mockup .dot-y { background: #FEBC2E; }
.hero-mockup .dot-g { background: #28C840; }

.eq-bars { display: flex; align-items: flex-end; gap: 6px; height: 120px; margin-bottom: 20px; }
.eq-bar {
  flex: 1;
  background: linear-gradient(180deg, var(--color-orange), var(--color-orange-dark));
  border-radius: 3px 3px 0 0;
  animation: eq-bounce 1.6s ease-in-out infinite;
}
@keyframes eq-bounce {
  0%, 100% { height: 30%; }
  50% { height: 90%; }
}
.eq-bar:nth-child(1) { animation-delay: 0s; }
.eq-bar:nth-child(2) { animation-delay: 0.1s; }
.eq-bar:nth-child(3) { animation-delay: 0.2s; }
.eq-bar:nth-child(4) { animation-delay: 0.3s; }
.eq-bar:nth-child(5) { animation-delay: 0.4s; }
.eq-bar:nth-child(6) { animation-delay: 0.5s; }
.eq-bar:nth-child(7) { animation-delay: 0.6s; }
.eq-bar:nth-child(8) { animation-delay: 0.7s; }
.eq-bar:nth-child(9) { animation-delay: 0.8s; }

.effect-row { display: grid; grid-template-columns: 90px 1fr 40px; gap: 12px; align-items: center; margin-bottom: 12px; }
.effect-row .label { font-size: 13px; color: var(--color-text-2); font-weight: 500; }
.effect-row .track {
  height: 6px; background: var(--color-bg-4); border-radius: var(--radius-full); overflow: hidden;
}
.effect-row .fill { height: 100%; background: var(--color-orange); border-radius: var(--radius-full); }
.effect-row .value { font-size: 12px; color: var(--color-orange); text-align: right; font-weight: 600; }

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  text-align: center;
}
.stat .num {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: var(--color-orange);
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat .label { font-size: 14px; color: var(--color-text-3); }

/* ---------- Use Cases / Scenario Cards ---------- */
.scenarios-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.scenario-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.scenario-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--color-orange);
  transform: scaleX(0); transform-origin: left; transition: var(--transition);
}
.scenario-card:hover {
  background: var(--color-card-hover);
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.scenario-card:hover::before { transform: scaleX(1); }
.scenario-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: rgba(255, 107, 53, 0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-orange);
  margin-bottom: 20px;
}
.scenario-icon svg { width: 28px; height: 28px; }
.scenario-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.scenario-card p { font-size: 14px; color: var(--color-text-2); line-height: 1.7; margin-bottom: 16px; }
.scenario-card .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.scenario-card .tag {
  font-size: 12px; padding: 4px 10px; border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05); color: var(--color-text-3);
  border: 1px solid var(--color-border);
}

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--color-card-hover);
  border-color: var(--color-orange);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-card .icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.2), rgba(255, 107, 53, 0.05));
  display: flex; align-items: center; justify-content: center;
  color: var(--color-orange);
  margin-bottom: 20px;
  border: 1px solid rgba(255, 107, 53, 0.2);
}
.feature-card .icon svg { width: 28px; height: 28px; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--color-text-2); line-height: 1.75; }

/* ---------- Reviews ---------- */
.reviews-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.review-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex; flex-direction: column; gap: 16px;
  transition: var(--transition);
}
.review-card:hover {
  background: var(--color-card-hover);
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}
.review-stars { display: flex; gap: 2px; color: var(--color-orange); }
.review-stars svg { width: 16px; height: 16px; }
.review-text { font-size: 15px; color: var(--color-text); line-height: 1.7; flex: 1; }
.review-user { display: flex; align-items: center; gap: 12px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.review-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-orange), var(--color-orange-dark));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 15px;
}
.review-user-info .name { font-size: 14px; font-weight: 600; }
.review-user-info .meta { font-size: 12px; color: var(--color-text-3); }

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(255, 107, 53, 0.04));
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; top: -50%; left: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(255, 107, 53, 0.15), transparent 60%);
  pointer-events: none;
}
.cta-section h2 {
  font-size: clamp(28px, 4vw, 40px); font-weight: 800;
  letter-spacing: -1px; margin-bottom: 16px; position: relative;
}
.cta-section p {
  font-size: 17px; color: var(--color-text-2); max-width: 600px;
  margin: 0 auto 32px; position: relative;
}
.cta-section .btn-group { position: relative; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand-line { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .brand-line img { height: 32px; }
.footer-brand .brand-line .brand-text { font-size: 20px; font-weight: 800; }
.footer-brand .brand-line .accent { color: var(--color-orange); }
.footer-brand p { font-size: 14px; color: var(--color-text-3); line-height: 1.7; margin-bottom: 20px; max-width: 320px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: var(--color-bg-3); border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-3);
}
.footer-social a:hover { color: var(--color-orange); border-color: var(--color-orange); background: rgba(255, 107, 53, 0.1); }
.footer-social svg { width: 18px; height: 18px; }

.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: 20px; color: var(--color-text); text-transform: uppercase; letter-spacing: 1px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: var(--color-text-3); }
.footer-col ul li a:hover { color: var(--color-orange); }

.footer-bottom {
  padding-top: 24px; border-top: 1px solid var(--color-border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--color-text-3);
}
.footer-bottom a { color: var(--color-text-3); }
.footer-bottom a:hover { color: var(--color-orange); }

/* ---------- Download Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-overlay.active { opacity: 1; visibility: visible;   left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}
.modal {
  background: linear-gradient(135deg, var(--color-bg-3), var(--color-bg-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 720px; width: 100%;
  max-height: 90vh; overflow-y: auto;
  position: relative;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-bg-4); color: var(--color-text-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; transition: var(--transition);
  z-index: 2;
}
.modal-close:hover { background: var(--color-orange); color: #fff; transform: rotate(90deg); }

.modal-header {
  padding: 40px 40px 24px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse 400px 200px at 50% 0%, rgba(255, 107, 53, 0.15), transparent 70%);
}
.modal-header .badge-sm {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: var(--radius-full);
  background: rgba(255, 107, 53, 0.1); color: var(--color-orange);
  font-size: 12px; font-weight: 600;
  border: 1px solid rgba(255, 107, 53, 0.2);
  margin-bottom: 16px;
}
.modal-header h3 { font-size: 28px; font-weight: 800; margin-bottom: 8px; letter-spacing: -0.5px; }
.modal-header p { font-size: 14px; color: var(--color-text-2); }

.modal-body { padding: 32px 40px 40px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.qr-item {
  text-align: center; padding: 24px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.qr-item:hover { border-color: var(--color-orange); background: rgba(255, 107, 53, 0.05); }
.qr-item .qr-img {
  width: 180px; height: 180px; margin: 0 auto 16px;
  background: #fff; border-radius: var(--radius-md);
  padding: 12px; display: flex; align-items: center; justify-content: center;
}
.qr-item .qr-img img { width: 100%; height: 100%; object-fit: contain; }
.qr-item .qr-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.qr-item .qr-desc { font-size: 12px; color: var(--color-text-3); }

.modal-info {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  padding: 16px; background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md); margin-bottom: 24px;
}
.modal-info-item { text-align: center; }
.modal-info-item .label { font-size: 11px; color: var(--color-text-3); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.modal-info-item .value { font-size: 14px; font-weight: 600; color: var(--color-text); }
.modal-info-item .value.accent { color: var(--color-orange); }

.modal-footer-note {
  font-size: 12px; color: var(--color-text-3); text-align: center;
  padding-top: 20px; border-top: 1px solid var(--color-border);
  line-height: 1.7;
}

/* ---------- Page Hero (Inner pages) ---------- */
.page-hero {
  padding: 140px 0 64px;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 700px 400px at 30% 30%, rgba(255, 107, 53, 0.12), transparent 60%),
    radial-gradient(ellipse 500px 400px at 80% 70%, rgba(255, 107, 53, 0.06), transparent 60%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: rgba(255, 107, 53, 0.1); color: var(--color-orange);
  font-size: 13px; font-weight: 600; border: 1px solid rgba(255, 107, 53, 0.2);
  margin-bottom: 20px;
}
.page-hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800; letter-spacing: -1.5px; line-height: 1.15;
  margin-bottom: 20px; max-width: 800px;
}
.page-hero h1 .accent { color: var(--color-orange); }
.page-hero .lead {
  font-size: 18px; color: var(--color-text-2);
  line-height: 1.7; max-width: 680px;
  margin-bottom: 32px;
}
.breadcrumb {
  display: flex; gap: 8px; align-items: center;
  font-size: 13px; color: var(--color-text-3);
  margin-bottom: 24px;
}
.breadcrumb a:hover { color: var(--color-orange); }
.breadcrumb .sep { color: var(--color-text-4); }

/* ---------- Two Column Content ---------- */
.two-col {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.two-col.reverse .col-text { order: 2; }
.col-text h2 {
  font-size: clamp(26px, 3.5vw, 36px); font-weight: 800;
  letter-spacing: -1px; margin-bottom: 16px; line-height: 1.2;
}
.col-text h2 .accent { color: var(--color-orange); }
.col-text p { font-size: 16px; color: var(--color-text-2); line-height: 1.75; margin-bottom: 20px; }
.col-text ul.checklist { margin: 20px 0 28px; }
.col-text ul.checklist li {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 12px; font-size: 15px; color: var(--color-text-2);
}
.col-text ul.checklist li .check {
  width: 20px; height: 20px; border-radius: 50%;
  background: rgba(255, 107, 53, 0.15); color: var(--color-orange);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}
.col-text ul.checklist li .check svg { width: 12px; height: 12px; }

.col-visual {
  background: linear-gradient(135deg, var(--color-bg-3), var(--color-bg-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative; overflow: hidden;
  min-height: 360px;
}

/* ---------- Effect detail (gaming page) ---------- */
.effect-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 32px;
}
.effect-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.effect-card:hover {
  border-color: var(--color-orange);
  background: var(--color-card-hover);
}
.effect-card .num {
  display: inline-block; font-size: 14px; font-weight: 700;
  color: var(--color-orange); margin-bottom: 8px;
  font-family: var(--font-mono);
}
.effect-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.effect-card p { font-size: 14px; color: var(--color-text-2); line-height: 1.7; }

/* ---------- Preset Showcase ---------- */
.preset-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px;
}
.preset-card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 20px;
  transition: var(--transition); cursor: pointer;
  text-align: center;
}
.preset-card:hover {
  border-color: var(--color-orange); background: var(--color-card-hover);
  transform: translateY(-2px);
}
.preset-card .preset-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: rgba(255, 107, 53, 0.1); color: var(--color-orange);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
}
.preset-card .preset-icon svg { width: 24px; height: 24px; }
.preset-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.preset-card p { font-size: 12px; color: var(--color-text-3); }

/* ---------- Download Page Specific ---------- */
.download-options {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 64px;
}
.dl-card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 32px;
  transition: var(--transition); position: relative;
}
.dl-card.featured {
  border-color: var(--color-orange);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), var(--color-card));
}
.dl-card .ribbon {
  position: absolute; top: -12px; right: 24px;
  padding: 4px 12px; border-radius: var(--radius-full);
  background: var(--color-orange); color: #fff;
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
}
.dl-card .platform {
  display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
  font-size: 14px; color: var(--color-text-3);
}
.dl-card .platform svg { width: 20px; height: 20px; color: var(--color-orange); }
.dl-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 8px; }
.dl-card .version { font-size: 13px; color: var(--color-text-3); margin-bottom: 20px; }
.dl-card .meta-list { margin-bottom: 24px; }
.dl-card .meta-list li {
  display: flex; justify-content: space-between; padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}
.dl-card .meta-list li:last-child { border-bottom: none; }
.dl-card .meta-list .key { color: var(--color-text-3); }
.dl-card .meta-list .val { color: var(--color-text); font-weight: 500; }

/* ---------- Version History Table ---------- */
.version-table {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.version-row {
  display: grid; grid-template-columns: 120px 120px 1fr 100px;
  gap: 24px; padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
  align-items: center;
}
.version-row:last-child { border-bottom: none; }
.version-row:hover { background: var(--color-card-hover); }
.version-row .ver { font-family: var(--font-mono); font-size: 15px; font-weight: 700; color: var(--color-orange); }
.version-row .date { font-size: 13px; color: var(--color-text-3); }
.version-row .changes { font-size: 14px; color: var(--color-text-2); }
.version-row .tag {
  font-size: 11px; padding: 4px 10px; border-radius: var(--radius-full);
  text-align: center; font-weight: 600;
}
.tag-stable { background: rgba(34, 197, 94, 0.15); color: var(--color-success); }
.tag-beta { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); margin-bottom: 12px;
  overflow: hidden; transition: var(--transition);
}
.faq-item.active { border-color: var(--color-orange); }
.faq-question {
  width: 100%; text-align: left;
  padding: 20px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-size: 16px; font-weight: 600; color: var(--color-text);
}
.faq-question .icon {
  width: 24px; height: 24px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-orange); transition: var(--transition);
}
.faq-item.active .faq-question .icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px; font-size: 15px; color: var(--color-text-2); line-height: 1.75;
}

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 32px; max-width: 760px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 8px; top: 8px; bottom: 0;
  width: 2px; background: var(--color-border);
}
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ''; position: absolute; left: -28px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
}
.timeline-item .year {
  font-size: 13px; font-weight: 700; color: var(--color-orange);
  font-family: var(--font-mono); margin-bottom: 6px;
}
.timeline-item h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.timeline-item p { font-size: 14px; color: var(--color-text-2); line-height: 1.7; }

/* ---------- Info Banner ---------- */
.info-banner {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 20px 24px; border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.08); border: 1px solid rgba(59, 130, 246, 0.25);
  margin: 32px 0;
}
.info-banner .icon {
  width: 24px; height: 24px; flex-shrink: 0; color: var(--color-info);
  display: flex; align-items: center; justify-content: center;
}
.info-banner .icon svg { width: 20px; height: 20px; }
.info-banner .content { font-size: 14px; color: var(--color-text-2); line-height: 1.7; }
.info-banner .content strong { color: var(--color-text); }
.info-banner.warning { background: rgba(245, 158, 11, 0.08); border-color: rgba(245, 158, 11, 0.25); }
.info-banner.warning .icon { color: var(--color-warning); }
.info-banner.success { background: rgba(34, 197, 94, 0.08); border-color: rgba(34, 197, 94, 0.25); }
.info-banner.success .icon { color: var(--color-success); }

/* ---------- Comparison Table ---------- */
.compare-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.compare-table th, .compare-table td {
  padding: 16px 20px; text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.compare-table thead th {
  background: var(--color-bg-3); font-weight: 700;
  color: var(--color-text); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px;
}
.compare-table thead th.highlight { color: var(--color-orange); }
.compare-table tbody tr:hover { background: var(--color-card-hover); }
.compare-table td.highlight { background: rgba(255, 107, 53, 0.04); }
.compare-table .check { color: var(--color-success); font-weight: 700; }
.compare-table .cross { color: var(--color-text-4); }
.compare-table .row-name { font-weight: 600; color: var(--color-text); }

/* ---------- System Reqs ---------- */
.req-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.req-card {
  background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 24px;
}
.req-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; color: var(--color-orange); }
.req-card ul li {
  display: flex; justify-content: space-between;
  padding: 10px 0; border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.req-card ul li:last-child { border-bottom: none; }
.req-card ul li .key { color: var(--color-text-3); }
.req-card ul li .val { color: var(--color-text); font-weight: 500; }

/* ---------- Visual decorations ---------- */
.wave-decoration {
  position: absolute; bottom: 0; left: 0; right: 0; height: 100px;
  pointer-events: none; opacity: 0.3;
}

/* ---------- Animations on scroll ---------- */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .two-col { grid-template-columns: 1fr; gap: 32px; }
  .two-col.reverse .col-text { order: 1; }
  .download-options { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .effect-detail { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-lg { padding: 80px 0; }
  .container { padding: 0 20px; }
  .nav-menu {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--color-bg-2); border-bottom: 1px solid var(--color-border);
    padding: 16px; gap: 4px;
    transform: translateY(-150%); transition: transform 0.3s ease;
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .nav-menu.active { transform: translateY(0); }
  .nav-menu a { padding: 14px 16px; font-size: 16px; }
  .nav-toggle { display: flex; }
  .nav-actions .btn-text { display: none; }
  .hero { padding: 120px 0 64px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cta-section { padding: 40px 24px; }
  .cta-section .btn-group { flex-direction: column; }
  .cta-section .btn-group .btn { width: 100%; }
  .qr-grid { grid-template-columns: 1fr; }
  .modal-info { grid-template-columns: 1fr 1fr; }
  .version-row { grid-template-columns: 1fr; gap: 8px; }
  .version-row .tag { justify-self: start; }
  .compare-table { font-size: 12px; }
  .compare-table th, .compare-table td { padding: 10px 12px; }
  .req-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .preset-grid { grid-template-columns: 1fr; }
  .modal-header, .modal-body { padding: 24px; }
  .qr-item .qr-img { width: 140px; height: 140px; }
}

/* ---------- Print friendly ---------- */
@media print {
  .site-header, .site-footer, .modal-overlay, .nav-toggle { display: none; }
  body { background: #fff; color: #000; }
}