:root {
  --primary: #0A84FF;
  --accent: #5AC8FA;
  --destructive: #FF453A;
  --success: #32D74B;
  --warning: #FF9F0A;
  --bg: #000000;
  --card-bg: rgba(28, 28, 30, 0.6);
  --text: #FFFFFF;
  --text-dim: #8E8E93;
  --max-w: 1200px;
  --nav-h: 70px;
}

/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, Roboto, sans-serif; }
body { background: var(--bg); color: var(--text); overflow-x: hidden; }
.no-select { user-select: none; -webkit-user-select: none; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { pointer-events: none; }

/* Canvas & Loader */
#bg-canvas { position: fixed; inset: 0; z-index: -1; }
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); z-index: 2000; width: 0%; }
.loader-overlay { position: fixed; inset: 0; background: #000; z-index: 9999; display: flex; align-items: center; justify-content: center; }
.loader-icon { width: 80px; border-radius: 18px; margin-bottom: 10px; }
.loader-text { font-size: 1.2rem; font-weight: bold; text-align: center; }
.loader-content { text-align: center; }

/* Layout Utils */
.container { width: 90%; max-width: var(--max-w); margin: 0 auto; }
section { padding: 100px 0; position: relative; }
.glass-card { background: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.08); border-radius: 24px; box-shadow: 0 8px 32px rgba(0,0,0,0.3); transition: transform 0.3s; }
.glass-card:hover { transform: translateY(-5px); border-color: rgba(255,255,255,0.15); }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.section-header p { color: var(--text-dim); }

/* Nav */
.glass-nav { position: fixed; top: 0; width: 100%; height: var(--nav-h); z-index: 1000; transition: 0.3s; }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 100%; width: 90%; max-width: var(--max-w); margin: 0 auto; padding: 0 1rem; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: bold; font-size: 1.2rem; }
.logo-img { width: 36px; border-radius: 8px; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a:hover { color: var(--primary); }
.menu-toggle { display: none; font-size: 1.5rem; cursor: pointer; transition: color 0.3s; }
.menu-toggle:hover { color: var(--primary); }
.btn-primary { background: var(--primary); padding: 0.5rem 1.2rem; border-radius: 20px; font-weight: 600; }

/* Hero */
.hero-section { min-height: 100vh; display: flex; align-items: center; padding-top: var(--nav-h); }
.hero-flex { display: flex; justify-content: space-between; align-items: center; width: 100%; gap: 2rem; }
.hero-text { flex: 1; max-width: 500px; }
.hero-title { font-size: 4rem; line-height: 1.1; margin: 1rem 0; background: linear-gradient(135deg, #fff, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-badge { color: var(--accent); font-weight: bold; text-transform: uppercase; letter-spacing: 1px; font-size: 0.9rem; }
.subtitle { color: var(--text-dim); font-size: 1.2rem; line-height: 1.6; margin-bottom: 2rem; }
.btn-ios { background: rgba(255,255,255,0.1); padding: 0.8rem 1.5rem; border-radius: 12px; display: inline-flex; align-items: center; gap: 8px; }
.badge-pill { padding: 8px 16px; background: rgba(255,255,255,0.05); border-radius: 20px; color: var(--text-dim); border: 1px solid rgba(255,255,255,0.1); }
.pulse { animation: pulse 2s infinite; }
@keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.6; } 100% { opacity: 1; } }

/* Phone Mockup */
.hero-visual { flex: 1; display: flex; justify-content: center; }
.phone-mockup { width: 300px; height: 600px; background: #000; border: 10px solid #222; border-radius: 40px; position: relative; box-shadow: 0 20px 50px rgba(0,0,0,0.5); transform-style: preserve-3d; perspective: 1000px; }
.screen { width: 100%; height: 100%; background: #111; border-radius: 30px; overflow: hidden; position: relative; }
.swiper-container { width: 100%; height: 100%; position: relative; }
.swiper-card { position: absolute; top: 10%; left: 5%; width: 90%; height: 70%; background: #222; border-radius: 20px; overflow: hidden; transform-origin: bottom center; will-change: transform; box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.card-img { width: 100%; height: 100%; background-size: cover; background-position: center; }
.card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent 40%); pointer-events: none; }
.card-info { position: absolute; bottom: 15px; width: 100%; padding: 0 20px; display: flex; justify-content: space-between; font-size: 0.9rem; pointer-events: none; }
.hand-hint { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); font-size: 2rem; opacity: 0; transition: 0.3s; background: rgba(0,0,0,0.5); padding: 15px; border-radius: 50%; backdrop-filter: blur(5px); }
.swiper-container:hover .hand-hint { opacity: 1; }
.app-ui-overlay { position: absolute; inset: 0; pointer-events: none; }
.app-bar-bottom { position: absolute; bottom: 0; width: 100%; height: 80px; display: flex; justify-content: space-around; align-items: center; background: linear-gradient(to top, rgba(0,0,0,0.8), transparent); font-size: 1.5rem; color: var(--text-dim); }
.action-icon { transition: 0.2s; }
.action-icon.active { color: var(--primary); transform: scale(1.2); }
.delete-hint.active { color: var(--destructive); }
.keep-hint.active { color: var(--success); }

/* Guide */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.guide-item { padding: 2rem; position: relative; overflow: hidden; }
.step-num { font-size: 4rem; font-weight: 900; color: rgba(255,255,255,0.03); position: absolute; top: -10px; right: 10px; }
.guide-icon { font-size: 2rem; color: var(--primary); margin-top: 1rem; }
.guide-icon.warning { color: var(--warning); }
.guide-icon.success { color: var(--success); }

/* Security */
.security-layout { display: flex; align-items: center; padding: 3rem; gap: 3rem; }
.security-text { flex: 2; }
.security-visual { flex: 1; display: flex; justify-content: center; position: relative; }
.security-icon { font-size: 6rem; color: var(--success); z-index: 1; }
.circle-anim { position: absolute; width: 100px; height: 100px; border: 2px solid var(--success); border-radius: 50%; animation: ping 2s infinite; }
@keyframes ping { 0% { transform: scale(1); opacity: 1; } 100% { transform: scale(2); opacity: 0; } }
.check-list li { margin-bottom: 0.8rem; display: flex; align-items: center; gap: 10px; color: var(--text-dim); }
.check-list i { color: var(--success); }

/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.feature-card { padding: 2rem; text-align: center; }
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.feature-icon.primary { color: var(--primary); }
.feature-icon.accent { color: var(--accent); }
.feature-icon.warning { color: var(--warning); }
.feature-icon.orange { color: #FF9500; }

/* Testimonials */
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.testimonial-card { padding: 2rem; display: flex; flex-direction: column; align-items: center; text-align: center; }
.user-avatar { width: 60px; height: 60px; border-radius: 50%; background-size: cover; margin-bottom: 1rem; border: 2px solid var(--primary); }
.user-name { margin-top: 1rem; color: var(--text-dim); font-size: 0.9rem; }

/* Pricing */
.pricing-container { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; }
.pricing-card { flex: 1; min-width: 250px; max-width: 320px; padding: 2rem; position: relative; display: flex; flex-direction: column; align-items: center; }
.pricing-card.popular { border-color: var(--warning); background: rgba(255, 159, 10, 0.08); }
.badge { position: absolute; top: -10px; background: var(--warning); padding: 4px 12px; border-radius: 10px; font-size: 0.8rem; color: #000; font-weight: bold; }
.discount-badge { position: absolute; top: 10px; right: 10px; background: #FF453A; padding: 4px 8px; border-radius: 6px; font-size: 0.7rem; color: #fff; font-weight: bold; }
.price-wrapper { text-align: center; margin: 1rem 0; }
.price { font-size: 2rem; font-weight: bold; color: var(--primary); }
.original-price { font-size: 1rem; color: var(--text-dim); text-decoration: line-through; margin-top: 4px; }
.pricing-card li { margin-bottom: 0.5rem; color: var(--text-dim); font-size: 0.9rem; display: flex; gap: 8px; }

/* Contact Author */
.contact-author-section { padding: 80px 0; }
.contact-grid { display: flex; justify-content: center; flex-wrap: wrap; gap: 2rem; }
.contact-card { flex: 1; min-width: 280px; max-width: 380px; padding: 2rem; display: flex; flex-direction: column; align-items: center; text-align: center; }
.contact-icon { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; margin-bottom: 1rem; }
.contact-icon.wechat { background: rgba(7, 193, 96, 0.15); color: #07C160; }
.contact-icon.xiaohongshu { background: rgba(255, 36, 66, 0.15); color: #FF2442; }
.contact-card h3 { margin-bottom: 0.5rem; }
.contact-card p { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 1rem; }
.contact-card .qr-code { width: 180px; height: 180px; background: #fff; border-radius: 12px; padding: 10px; margin-bottom: 1rem; display: flex; align-items: center; justify-content: center; }
.contact-card .qr-code img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.contact-card .xiaohongshu-placeholder { background: rgba(255, 36, 66, 0.1); color: #FF2442; font-size: 3rem; }
.contact-id { color: var(--text-dim); font-size: 0.85rem; }
.contact-link { color: #FF2442; font-size: 0.9rem; font-weight: 600; padding: 8px 16px; background: rgba(255, 36, 66, 0.1); border-radius: 20px; transition: 0.3s; }
.contact-link:hover { background: rgba(255, 36, 66, 0.2); }

/* Donation */
.donation-section { padding: 80px 0; }
.donation-grid { display: flex; justify-content: center; flex-wrap: wrap; gap: 2rem; margin-bottom: 2rem; }
.donation-card { flex: 1; min-width: 250px; max-width: 320px; padding: 2rem; display: flex; flex-direction: column; align-items: center; text-align: center; }
.donation-icon { width: 50px; height: 50px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1rem; }
.donation-icon.wechat-pay { background: rgba(7, 193, 96, 0.15); color: #07C160; }
.donation-icon.alipay { background: rgba(0, 166, 226, 0.15); color: #00A6E2; }
.donation-card h3 { margin-bottom: 1rem; }
.donation-card .qr-code { width: 200px; height: 200px; background: #fff; border-radius: 12px; padding: 10px; display: flex; align-items: center; justify-content: center; }
.donation-card .qr-code img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.donation-note { text-align: center; color: var(--text-dim); font-size: 0.9rem; }

/* Recharge Section */
.recharge-section { padding: 80px 0; }
.recharge-layout { display: flex; gap: 2rem; justify-content: center; flex-wrap: wrap; }
.recharge-qr-area { flex: 1; min-width: 300px; max-width: 400px; }
.recharge-form-area { flex: 1; min-width: 350px; max-width: 500px; padding: 2rem; }

/* QR Tabs */
.qr-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.qr-tab { flex: 1; padding: 12px 16px; background: var(--card-bg); border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; color: var(--text-dim); font-size: 0.9rem; cursor: pointer; transition: all 0.3s; display: flex; align-items: center; justify-content: center; gap: 8px; }
.qr-tab:hover { border-color: rgba(255,255,255,0.2); }
.qr-tab.active { background: rgba(10, 132, 255, 0.15); border-color: var(--primary); color: var(--primary); }
.qr-tab[data-payment="wechat"].active { background: rgba(7, 193, 96, 0.15); border-color: #07C160; color: #07C160; }
.qr-tab[data-payment="alipay"].active { background: rgba(0, 166, 226, 0.15); border-color: #00A6E2; color: #00A6E2; }

/* QR Display */
.qr-display { padding: 2rem; text-align: center; }
.qr-code-large { width: 240px; height: 240px; background: #fff; border-radius: 16px; padding: 15px; margin: 0 auto 1rem; }
.qr-code-large img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.qr-tip { color: var(--text-dim); font-size: 0.85rem; }

/* Form Styles */
.recharge-form-area h3 { margin-bottom: 1.5rem; display: flex; align-items: center; gap: 10px; font-size: 1.2rem; }
.recharge-form-area h3 i { color: var(--primary); }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--text); }
.form-group .optional { color: var(--text-dim); font-size: 0.8rem; }
.form-group .required { color: var(--destructive); font-size: 0.9rem; }

/* Radio Group */
.radio-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.radio-item { flex: 1; min-width: 80px; padding: 10px 14px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; cursor: pointer; transition: all 0.2s; text-align: center; font-size: 0.9rem; display: flex; align-items: center; justify-content: center; gap: 6px; }
.radio-item:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.08); }
.radio-item.active { background: rgba(10, 132, 255, 0.15); border-color: var(--primary); color: var(--primary); }
.radio-item[data-value="wechat"].active { background: rgba(7, 193, 96, 0.15); border-color: #07C160; color: #07C160; }
.radio-item[data-value="alipay"].active { background: rgba(0, 166, 226, 0.15); border-color: #00A6E2; color: #00A6E2; }

/* Card Type Group */
.card-type-group .radio-item { flex-direction: column; padding: 12px; }
.card-type-group .card-name { font-weight: 600; }
.card-type-group .card-price { font-size: 0.8rem; opacity: 0.8; margin-top: 2px; }

/* Input Styles */
#payment-amount{
  padding-left:25px;
}
.input-wrapper { position: relative; display: flex; align-items: center; }
.input-prefix { position: absolute; left: 14px; color: var(--text-dim); font-size: 1rem; pointer-events: none; z-index: 1; }
.input-wrapper input { padding-left: 36px; }
.recharge-form-area input, .recharge-form-area textarea { width: 100%; padding: 12px 14px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; color: var(--text); font-size: 0.95rem; transition: all 0.2s; }
.recharge-form-area input:focus, .recharge-form-area textarea:focus { outline: none; border-color: var(--primary); background: rgba(10, 132, 255, 0.05); }
.recharge-form-area input::placeholder, .recharge-form-area textarea::placeholder { color: var(--text-dim); }
.recharge-form-area textarea { min-height: 80px; resize: vertical; }

/* Submit Button */
.submit-btn { width: 100%; padding: 14px; background: linear-gradient(135deg, var(--primary), var(--accent)); border: none; border-radius: 12px; color: #fff; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s; display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 1.5rem; }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(10, 132, 255, 0.3); }
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.submit-btn.loading { pointer-events: none; }
.submit-btn.loading::after { content: ''; width: 18px; height: 18px; border: 2px solid #fff; border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; margin-left: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Form Note */
.form-note { margin-top: 1rem; padding: 12px; background: rgba(255, 159, 10, 0.1); border-radius: 8px; font-size: 0.8rem; color: var(--warning); display: flex; align-items: flex-start; gap: 8px; }
.form-note i { margin-top: 2px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(5px); z-index: 2000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity 0.3s, visibility 0.3s; }
.modal-overlay.show { opacity: 1; visibility: visible; pointer-events: auto; }
.modal-content { padding: 2.5rem; text-align: center; max-width: 360px; width: 90%; transform: scale(0.9); transition: transform 0.3s; }
.modal-overlay.show .modal-content { transform: scale(1); }
.modal-icon { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; margin: 0 auto 1.2rem; }
.modal-icon.success { background: rgba(50, 215, 75, 0.15); color: var(--success); }
.modal-icon.error { background: rgba(255, 69, 58, 0.15); color: var(--destructive); }
.modal-content h3 { margin-bottom: 0.8rem; font-size: 1.3rem; }
.modal-content p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 1.5rem; line-height: 1.5; }
.modal-btn { padding: 12px 40px; background: var(--primary); border: none; border-radius: 10px; color: #fff; font-size: 1rem; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.modal-btn:hover { background: #0070E0; }

/* Mobile Recharge */
@media (max-width: 768px) {
  .recharge-layout { flex-direction: column; align-items: center; }
  .recharge-qr-area, .recharge-form-area { max-width: 100%; min-width: auto; width: 100%; }
  .qr-code-large { width: 200px; height: 200px; }
  .radio-group { flex-wrap: wrap; }
  .radio-item { min-width: calc(50% - 0.25rem); }
  .card-type-group .radio-item { min-width: calc(33.33% - 0.35rem); }
}

/* Footer */
.footer-section { padding: 3rem 0; background: rgba(0,0,0,0.5); margin-top: 3rem; }
.footer-flex { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 2rem; }
.footer-contact h4 { margin-bottom: 0.5rem; }
.footer-contact p { color: var(--text-dim); margin-bottom: 0.3rem; display: flex; gap: 10px; align-items: center; }
.copyright { text-align: center; margin-top: 2rem; color: var(--text-dim); font-size: 0.8rem; width: 100%; }
.text-center { text-align: center; }

/* Filing Info */
.filing-info { margin-top: 15px; font-size: 0.8rem; color: var(--text-dim); }
.filing-info a { color: var(--text-dim); transition: color 0.3s; display: inline-flex; align-items: center; gap: 5px; }
.filing-info a:hover { color: var(--text); }
.filing-info .divider { margin: 0 10px; opacity: 0.5; }
.filing-icon { width: 16px; height: 16px; vertical-align: middle; }

/* --- Privacy Page Specific Styles --- */
.privacy-page-container {
  padding-top: 100px;
  padding-bottom: 50px;
  min-height: 80vh;
}

.privacy-content {
  padding: 3rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.privacy-content:hover {
  transform: none; /* 移除隐私页面的悬浮上移效果，便于阅读 */
  border-color: rgba(255,255,255,0.08);
}

.page-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.last-updated {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.developer-info-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed var(--primary);
  padding: 15px;
  border-radius: 12px;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--primary);
}

.privacy-text-body h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.privacy-text-body p, .privacy-text-body li {
  line-height: 1.8;
  color: var(--text-dim);
  margin-bottom: 0.8rem;
  font-size: 1rem;
}

.privacy-text-body ul {
  list-style-type: disc;
  padding-left: 20px;
  margin-bottom: 1rem;
}

.privacy-text-body strong {
  color: var(--text);
}

/* Mobile Adapt */
@media (max-width: 768px) {
  .hero-flex { flex-direction: column; text-align: center; }
  .hero-title { font-size: 2.8rem; }
  .nav-links { display: none; } 
  .menu-toggle { display: block; }
  .nav-container { padding: 0 0.5rem; }
  .nav-container .btn-primary { display: none; }
  .logo { font-size: 1rem; }
  .logo-img { width: 32px; }
  .phone-mockup { width: 280px; height: 560px; }
  .security-layout { flex-direction: column; text-align: center; padding: 2rem; }
  .check-list { text-align: left; display: inline-block; }
  
  /* Privacy Mobile */
  .privacy-content { padding: 2rem; }
  .page-title { font-size: 1.8rem; }
}


/* ========== 功能对比表样式 ========== */
.feature-comparison {
  margin: 3rem auto;
  padding: 2.5rem;
  max-width: 900px;
}

.comparison-title {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 2rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.comparison-table {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
}

.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.05);
}

.comparison-row.header {
  background: rgba(10, 132, 255, 0.1);
}

.comparison-row.header .comparison-cell {
  font-weight: 600;
  font-size: 1rem;
  padding: 1rem;
  background: rgba(10, 132, 255, 0.15);
}

.comparison-cell {
  padding: 1.2rem 1rem;
  background: rgba(28, 28, 30, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: background 0.3s;
}

.comparison-cell.feature-name {
  justify-content: flex-start;
  gap: 10px;
  font-weight: 500;
}

.comparison-cell.vip-plan {
  background: rgba(10, 132, 255, 0.08);
}

.comparison-row:hover .comparison-cell {
  background: rgba(255, 255, 255, 0.08);
}

.comparison-row:hover .comparison-cell.vip-plan {
  background: rgba(10, 132, 255, 0.15);
}

.text-success {
  color: var(--success);
}

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

.text-muted {
  color: var(--text-dim);
}

/* ========== 用户案例样式 ========== */
.user-cases-section {
  background: linear-gradient(180deg, transparent, rgba(10, 132, 255, 0.03), transparent);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.case-card {
  padding: 2rem;
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(10, 132, 255, 0.2);
}

.case-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.case-icon::before {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  background: inherit;
  filter: blur(10px);
  opacity: 0.5;
  z-index: -1;
}

.case-icon.travel {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.case-icon.cleanup {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
}

.case-icon.family {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  color: white;
}

.case-icon.share {
  background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
  color: white;
}

.case-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.case-user {
  color: var(--primary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.case-desc {
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.case-stats {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.case-stats span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.case-stats i {
  color: var(--primary);
  width: 16px;
}

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
  .comparison-row {
    grid-template-columns: 1.5fr 1fr 1fr;
    font-size: 0.85rem;
  }
  
  .comparison-cell {
    padding: 0.8rem 0.5rem;
  }
  
  .comparison-cell.feature-name {
    font-size: 0.9rem;
  }
  
  .feature-comparison {
    padding: 1.5rem;
  }
  
  .comparison-title {
    font-size: 1.2rem;
  }
  
  .cases-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .case-card {
    padding: 1.5rem;
  }
}

/* ========== 滚动动画增强 ========== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* ========== 视差效果 ========== */
.parallax-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(10, 132, 255, 0.1), transparent 70%);
  transform: translateZ(-1px) scale(1.5);
  z-index: -1;
}

/* ========== 悬停效果增强 ========== */
.glass-card {
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

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

/* ========== 加载动画 ========== */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* ========== 移动端触摸优化 ========== */
@media (hover: none) and (pointer: coarse) {
  .glass-card:active {
    transform: scale(0.98);
  }
  
  .btn-primary:active,
  .btn-ios:active {
    transform: scale(0.95);
  }
  
  .case-card:active {
    transform: translateY(-4px);
  }
}

/* ========== 平滑滚动 ========== */
html {
  scroll-behavior: smooth;
}

/* ========== 页面切换动画 ========== */
.page-transition {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}


/* ========== 移动端导航菜单 ========== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    z-index: 1001;
    padding: 0.5rem;
  }
  
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    right: -100%;
    width: 75%;
    max-width: 320px;
    height: calc(100vh - var(--nav-h));
    background: rgba(28, 28, 30, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem 0;
    gap: 0;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    display: flex !important;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li {
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background 0.3s, color 0.3s;
    font-size: 0.95rem;
  }
  
  .nav-links a:hover,
  .nav-links a:active {
    background: rgba(10, 132, 255, 0.1);
    color: var(--primary);
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-flex {
    flex-direction: column;
    text-align: center;
  }
  
  .phone-mockup {
    width: 250px;
    height: 500px;
  }
}

/* Download Section */
.download-section { padding: 80px 0; }
.download-layout { display: flex; align-items: center; padding: 3rem; gap: 3rem; margin-bottom: 2rem; }
.download-text { flex: 1.5; }
.download-text h2 { font-size: 2.2rem; margin-bottom: 1rem; display: flex; align-items: center; gap: 10px; }
.download-desc { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 2rem; }

.download-features { display: flex; gap: 2rem; margin-bottom: 2rem; }
.download-feature { display: flex; align-items: center; gap: 8px; color: var(--text-dim); }
.download-feature i { color: var(--primary); font-size: 1.2rem; }

.download-buttons { display: flex; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.btn-download { display: flex; align-items: center; gap: 15px; padding: 1rem 1.5rem; border-radius: 16px; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); transition: all 0.3s; cursor: pointer; }
.btn-download.android { background: linear-gradient(135deg, #3DDC84, #2BA55D); border: none; }
.btn-download.android:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(61, 220, 132, 0.3); }
.btn-download.ios.disabled { opacity: 0.5; cursor: not-allowed; }
.btn-download i { font-size: 2rem; }
.btn-text { display: flex; flex-direction: column; gap: 2px; }
.btn-label { font-weight: 600; font-size: 1rem; }
.btn-sublabel { font-size: 0.85rem; opacity: 0.8; }

.download-info { color: var(--text-dim); font-size: 0.9rem; }
.download-info p { margin-bottom: 0.5rem; display: flex; align-items: center; gap: 8px; }
.download-info i { color: var(--primary); }

.download-visual { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2rem; }
.qr-code-container { width: 100%; display: flex; justify-content: center; }
.qr-code-box { text-align: center; }
.qr-placeholder { width: 200px; height: 200px; background: rgba(255,255,255,0.05); border: 2px dashed rgba(255,255,255,0.2); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; }
.qr-placeholder i { font-size: 4rem; color: var(--text-dim); }
.qr-tip { color: var(--text-dim); font-size: 0.9rem; }

.download-stats { display: flex; gap: 2rem; width: 100%; justify-content: center; }
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 5px; padding: 1rem; background: rgba(255,255,255,0.03); border-radius: 12px; min-width: 100px; }
.stat-item i { font-size: 1.5rem; color: var(--primary); }
.stat-number { font-size: 1.5rem; font-weight: bold; }
.stat-label { font-size: 0.85rem; color: var(--text-dim); }

/* Install Guide */
.install-guide { padding: 2rem; margin-top: 2rem; }
.install-guide h3 { font-size: 1.5rem; margin-bottom: 2rem; display: flex; align-items: center; gap: 10px; }
.guide-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.guide-step { display: flex; gap: 1rem; }
.step-number { width: 40px; height: 40px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0; }
.step-content h4 { margin-bottom: 0.5rem; }
.step-content p { color: var(--text-dim); font-size: 0.9rem; line-height: 1.5; }
.install-note { display: flex; align-items: flex-start; gap: 10px; padding: 1rem; background: rgba(255, 159, 10, 0.1); border-left: 3px solid var(--warning); border-radius: 8px; color: var(--text-dim); font-size: 0.9rem; line-height: 1.5; }
.install-note i { color: var(--warning); margin-top: 2px; flex-shrink: 0; }

.download-note { margin-top: 1rem; color: var(--text-dim); font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
.download-note i { color: var(--primary); }

/* Hero buttons update */
.hero-btns { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.btn-secondary { background: rgba(255,255,255,0.05); padding: 0.8rem 1.5rem; border-radius: 12px; display: inline-flex; align-items: center; gap: 8px; border: 1px solid rgba(255,255,255,0.1); }
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }

/* Responsive */
@media (max-width: 768px) {
  .download-layout { flex-direction: column; padding: 2rem; }
  .download-buttons { flex-direction: column; width: 100%; }
  .btn-download { width: 100%; justify-content: center; }
  .download-stats { flex-direction: column; gap: 1rem; }
  .guide-steps { grid-template-columns: 1fr; }
  .download-features { flex-direction: column; gap: 1rem; }
}