/* ============================================
   简养先生 - 品牌官网全局样式
   Brand: Jianyang (简养先生) - 银发生活方式平台
   Primary: #00C9B7 (teal)
   ============================================ */

/* CSS Variables / Design Tokens */
:root {
  --color-primary: #00C9B7;
  --color-primary-light: #25F4EE;
  --color-primary-dark: #00A89A;
  --color-accent: #FE2C55;
  --color-accent-light: #FF6B8A;
  --color-orange: #FF8A50;
  --color-text: #1A1A1A;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-bg: #FFFFFF;
  --color-bg-warm: #FFF9F5;
  --color-bg-light: #FAFBFC;
  --color-bg-teal: #E0F7FA;
  --color-border: #E5E7EB;
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

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

.section {
  padding: 80px 0;
}

.section--warm {
  background-color: var(--color-bg-warm);
}

.section--light {
  background-color: var(--color-bg-light);
}

.section--teal {
  background: linear-gradient(135deg, #E0F7FA 0%, #FFF9F5 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-header .tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 8px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,201,183,0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,201,183,0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(254,44,85,0.3);
}

.btn--accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(254,44,85,0.4);
}

.btn--lg {
  padding: 16px 40px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

/* Cards */
.card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.card__icon--primary {
  background: linear-gradient(135deg, #E0F7FA, #B2EBF2);
  color: var(--color-primary-dark);
}

.card__icon--accent {
  background: linear-gradient(135deg, #FFF0F3, #FFDEE5);
  color: var(--color-accent);
}

.card__icon--orange {
  background: linear-gradient(135deg, #FFF3E0, #FFE0B2);
  color: var(--color-orange);
}

.card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* Grid */
.grid {
  display: grid;
  gap: 24px;
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

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

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item__number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-item__label {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* Header / Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(229,231,235,0.5);
  transition: var(--transition);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
}

.navbar__logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.navbar__links a {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  position: relative;
}

.navbar__links a:hover,
.navbar__links a.active {
  color: var(--color-primary);
}

.navbar__links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

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

/* Mobile Menu Toggle */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.navbar__toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: linear-gradient(160deg, #FFFFFF 0%, #E0F7FA 50%, #FFF9F5 100%);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,201,183,0.08) 0%, transparent 70%);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(254,44,85,0.06) 0%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 580px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,201,183,0.1);
  color: var(--color-primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__visual .phone-mockup {
  width: 280px;
  height: 560px;
  background: #fff;
  border-radius: 36px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
  overflow: hidden;
  position: relative;
  border: 8px solid #1A1A1A;
}

.phone-mockup__screen {
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #E0F7FA 0%, #FFF9F5 50%, #FFF0F3 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
}

.phone-mockup__screen .app-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.phone-mockup__screen .app-name {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
}

.phone-mockup__screen .app-tagline {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Footer */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__brand h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 12px;
}

.footer__brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 10px;
}

.footer ul a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
}

.footer ul a:hover {
  color: var(--color-primary-light);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

.footer__bottom a {
  color: rgba(255,255,255,0.4);
  margin-left: 16px;
}

.footer__bottom a:hover {
  color: var(--color-primary-light);
}

/* Feature Icons (CSS-based) */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* Page Header (for inner pages) */
.page-header {
  background: linear-gradient(160deg, #FFFFFF 0%, #E0F7FA 100%);
  padding: 140px 0 60px;
  text-align: center;
}

.page-header h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.faq-item__question {
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item__answer {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  padding-top: 12px;
  line-height: 1.8;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-primary-light));
}

.timeline__item {
  position: relative;
  padding-bottom: 32px;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.timeline__item h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline__item p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.contact-info__item .icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-bg-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .hero h1 { font-size: 2.5rem; }
  .hero__visual .phone-mockup { width: 220px; height: 440px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 36px; }
  .section-header h2 { font-size: 1.75rem; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .navbar__links { display: none; }
  .navbar__toggle { display: flex; }
  .hero { flex-direction: column; text-align: center; padding-top: 100px; }
  .hero__content { order: 2; max-width: 100%; }
  .hero h1 { font-size: 2rem; }
  .hero__visual { order: 1; margin-bottom: 32px; }
  .hero__visual .phone-mockup { width: 180px; height: 360px; }
  .hero__buttons { justify-content: center; }
  .hero p { margin: 0 auto 24px; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }
  .contact-grid { grid-template-columns: 1fr; }
  .page-header { padding: 120px 0 40px; }
  .page-header h1 { font-size: 1.75rem; }
}

/* ============================================
   Services Page Styles
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.service-card {
  padding: 36px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.service-card__icon {
  margin-bottom: 20px;
}
.service-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}
.service-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.service-card__features {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
.service-card__features li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 2;
}
.service-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.6;
}

/* ============================================
   Steps / Flow Styles
   ============================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  counter-reset: step;
}
.step-card {
  text-align: center;
  padding: 40px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  position: relative;
  transition: var(--transition);
}
.step-card:hover {
  transform: translateY(-2px);
}
.step-card__number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.25;
  margin-bottom: 16px;
  line-height: 1;
}
.step-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}
.step-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   CTA Section Styles
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #008B7A 100%);
  padding: 80px 0;
}
.btn--white {
  display: inline-block;
  background: #fff;
  color: var(--color-primary-dark);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn--white:hover {
  background: var(--color-bg-light);
  transform: translateY(-2px);
}
.btn--outline-white {
  display: inline-block;
  background: transparent;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid rgba(255,255,255,0.6);
  cursor: pointer;
  transition: var(--transition);
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}

/* ============================================
   Responsive Adjustments (additions)
   ============================================ */
@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 480px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }
}