:root {
  --bg-primary: #0c1520;
  --bg-secondary: #111d2b;
  --bg-card: #162536;
  --bg-card-hover: #1d2f45;
  --border-subtle: rgba(201, 169, 110, 0.08);
  --border-light: rgba(201, 169, 110, 0.15);
  --text-primary: #f0ebe3;
  --text-secondary: rgba(240, 235, 227, 0.7);
  --text-tertiary: rgba(240, 235, 227, 0.4);
  --accent: #c9a96e;
  --accent-hover: #d4b87d;
  --accent-light: rgba(201, 169, 110, 0.12);
  --accent-glow: rgba(201, 169, 110, 0.3);
  --navy: #1a3a5c;
  --navy-light: #234a73;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
  --section-padding: clamp(80px, 12vw, 140px);
  --container-padding: clamp(20px, 5vw, 48px);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

.section-header.center {
  text-align: center;
}

.section-header.center .section-lead {
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  font-family: var(--font-body);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: #fff;
  border: 1px solid rgba(201, 169, 110, 0.3);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--navy-light) 0%, var(--navy) 100%);
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(201, 169, 110, 0.2);
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  background: rgba(201, 169, 110, 0.08);
  color: var(--text-primary);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.05rem;
}

.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(12, 21, 32, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none !important;
}

.nav-logo {
  width: 32px;
  height: 32px;
}

.nav-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  font-family: var(--font-display);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all 0.3s ease;
}

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

.nav-link {
  padding: 8px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: all 0.2s ease;
  text-decoration: none !important;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 60%;
}

main {
  padding-top: 64px;
}

/* Hero Section */
.hero-section {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  padding: var(--section-padding) 0;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(201, 169, 110, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(201, 169, 110, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 169, 110, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-section .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

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

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(201, 169, 110, 0.08);
  border: 1px solid rgba(201, 169, 110, 0.15);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 32px;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.title-line {
  display: block;
}

.title-line-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #e8d5a3 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 24px;
  font-family: var(--font-display);
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-tertiary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

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

.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
}

.phone-screen {
  position: relative;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  border-radius: 36px;
  border: 2px solid var(--border-light);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2;
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(201, 169, 110, 0.1);
}

.screen-content {
  text-align: center;
}

.screen-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #ff0050 0%, #ff6b6b 100%);
  border-radius: 16px;
  margin: 0 auto 16px;
  position: relative;
}

.screen-icon::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M19.59 6.69a4.83 4.83 0 01-3.77-4.25V2h-3.45v13.67a2.89 2.89 0 01-5.2 1.74 2.89 2.89 0 012.31-4.64 2.93 2.93 0 01.88.13V9.4a6.84 6.84 0 00-1-.05A6.33 6.33 0 005 20.1a6.34 6.34 0 0010.86-4.43v-7a8.16 8.16 0 004.77 1.52v-3.4a4.85 4.85 0 01-1-.1z' fill='white'/%3E%3C/svg%3E") center/60% no-repeat;
}

.screen-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.screen-time {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin-bottom: 20px;
}

.screen-bar {
  width: 160px;
  height: 6px;
  background: var(--bg-primary);
  border-radius: 3px;
  overflow: hidden;
  margin: 0 auto;
}

.screen-bar-fill {
  width: 75%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #e8d5a3 100%);
  border-radius: 3px;
  animation: barPulse 3s ease-in-out infinite;
}

@keyframes barPulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.phone-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  background: radial-gradient(circle, rgba(201, 169, 110, 0.2) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* Sections */
section {
  padding: var(--section-padding) 0;
  position: relative;
}

section:nth-child(even) {
  background: var(--bg-secondary);
}

/* Philosophy */
.philosophy-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
  margin-top: 64px;
}

.philosophy-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 40px 32px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.philosophy-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.philosophy-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.philosophy-item:hover::before {
  opacity: 1;
}

.philosophy-item-large {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.philosophy-num {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 24px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
}

.philosophy-item h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--text-primary);
  line-height: 1.4;
}

.philosophy-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.philosophy-quote {
  margin-top: 80px;
  text-align: center;
  padding: 60px 40px;
  background: linear-gradient(135deg, rgba(26, 58, 92, 0.3) 0%, rgba(201, 169, 110, 0.08) 100%);
  border-radius: 24px;
  border: 1px solid rgba(201, 169, 110, 0.1);
  position: relative;
}

.quote-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin: 0 auto 24px;
  opacity: 0.6;
}

.philosophy-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  line-height: 1.6;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-top: 48px;
  align-items: start;
}

.about-main {
  max-width: 480px;
}

.about-lead {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.about-main p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.stat-item {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  transition: all 0.3s ease;
}

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

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 36px;
  transition: all 0.3s ease;
}

.about-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(201, 169, 110, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.about-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Steps */
.steps {
  margin-top: 64px;
  max-width: 700px;
}

.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 32px;
  margin-bottom: 48px;
  position: relative;
}

.step:last-child {
  margin-bottom: 0;
}

.step-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.step-num {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  border: 2px solid var(--accent);
  border-radius: 50%;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
}

.step-line {
  width: 2px;
  flex: 1;
  min-height: 40px;
  background: linear-gradient(180deg, var(--accent) 0%, transparent 100%);
  margin-top: 8px;
  opacity: 0.4;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.test-note {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--border-subtle);
}

.test-note-item {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.test-note-item:hover {
  border-color: var(--border-light);
}

.note-icon {
  width: 40px;
  height: 40px;
  background: rgba(201, 169, 110, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--accent);
}

.note-icon svg {
  width: 20px;
  height: 20px;
}

.test-note-item strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  font-family: var(--font-display);
}

.test-note-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Download */
.download-box {
  margin-top: 48px;
  padding: 56px;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(26, 58, 92, 0.2) 100%);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  overflow: hidden;
}

.download-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}

.download-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
}

.download-info h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.download-version {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.download-version strong {
  color: var(--accent);
}

.download-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.download-reminder {
  margin-top: 40px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  padding: 24px;
  background: rgba(201, 169, 110, 0.05);
  border: 1px solid rgba(201, 169, 110, 0.1);
  border-radius: 12px;
}

.reminder-icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.download-reminder p {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* Feedback */
.feedback-hint {
  margin-top: 24px;
  padding: 20px 24px;
  background: rgba(201, 169, 110, 0.06);
  border: 1px solid rgba(201, 169, 110, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.hint-icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.feedback-hint p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feedback-hint strong {
  color: var(--accent);
}

.feedback-mode {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.feedback-form {
  margin-top: 40px;
  max-width: 800px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23c9a96e' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

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

/* Upload Zone */
.upload-zone {
  position: relative;
  padding: 40px;
  background: var(--bg-card);
  border: 2px dashed var(--border-light);
  border-radius: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: rgba(201, 169, 110, 0.03);
}

.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(201, 169, 110, 0.06);
  transform: scale(1.01);
}

.upload-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-zone-content {
  pointer-events: none;
}

.upload-icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin: 0 auto 16px;
}

.upload-text {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.upload-hint {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.screenshot-preview {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.screenshot-preview-item {
  position: relative;
  width: 120px;
  height: 120px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: var(--bg-card);
}

.screenshot-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.screenshot-remove-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,0,0,0.7);
  border: none;
  color: #fff;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.screenshot-remove-btn:hover {
  background: rgba(220,20,60,0.9);
  transform: scale(1.1);
}

.form-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.form-status {
  margin-top: 16px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* FAQ */
.faq-list {
  margin-top: 48px;
  max-width: 800px;
}

.faq-item {
  margin-bottom: 12px;
}

.faq-item details {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item details:hover {
  border-color: var(--border-light);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-toggle {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
}

.faq-toggle::before,
.faq-toggle::after {
  content: "";
  position: absolute;
  background: var(--text-tertiary);
  transition: all 0.3s ease;
}

.faq-toggle::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.faq-toggle::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.faq-item details[open] .faq-toggle::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.faq-item details[open] {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
}

.faq-item details p {
  padding: 0 24px 24px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Footer */
.footer {
  padding: 80px 0 48px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.footer-logo {
  width: 36px;
  height: 36px;
}

.footer-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  font-family: var(--font-display);
}

.footer-subtitle {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.footer-desc {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 28px;
}

.footer-meta {
  display: flex;
  gap: 24px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* Scroll Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Responsive */
@media (max-width: 1024px) {
  .hero-section .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-visual {
    display: none;
  }

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

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

  .philosophy-item-large {
    grid-row: span 1;
    grid-column: span 2;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-main {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: clamp(48px, 8vw, 80px);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(12, 21, 32, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 32px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-menu.is-open {
    transform: translateX(0);
  }

  .nav-link {
    padding: 16px 0;
    font-size: 1.125rem;
    border-bottom: 1px solid var(--border-subtle);
    border-radius: 0;
  }

  .nav-link:hover {
    background: none;
    color: var(--accent);
  }

  .hero-section {
    min-height: calc(100vh - 64px - 80px);
    padding-top: 48px;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 320px;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }

  .philosophy-item-large {
    grid-column: span 1;
  }

  .philosophy-quote {
    margin-top: 48px;
    padding: 40px 24px;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .stat-item {
    padding: 20px 12px;
  }

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

  .steps {
    margin-top: 48px;
  }

  .step {
    grid-template-columns: 48px 1fr;
    gap: 20px;
    margin-bottom: 36px;
  }

  .step-num {
    width: 48px;
    height: 48px;
    font-size: 1rem;
  }

  .test-note {
    grid-template-columns: 1fr;
    margin-top: 48px;
    padding-top: 36px;
  }

  .download-box {
    padding: 40px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

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

  .form-actions .btn {
    width: 100%;
  }

  .footer-meta {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .hero-eyebrow {
    font-size: 0.75rem;
    padding: 8px 16px;
  }

  .section-label {
    font-size: 0.6875rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}