@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@400;500;600;700&family=Nunito:wght@300;400;500;600;700&display=swap');

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 100px;
}

body {
  font-family: 'Nunito', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f5f5f5;
  color: #1f1f1f;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== CSS Variables ===== */
:root {
  --white: #ffffff;
  --bg: #f5f5f5;
  --ink: #1f1f1f;
  --ink-light: #555;
  --ink-muted: #888;
  --accent: #1f1f1f;
  --accent-hover: #333;
  --card-bg: #ffffff;
  --card-radius: 24px;
  --card-shadow: 0 4px 24px rgba(0,0,0,0.07);
  --card-shadow-hover: 0 8px 32px rgba(0,0,0,0.13);
  --nav-height: 100px;
  --gap: 16px;
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

/* ===== Site Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(31,31,31,0.08);
}

.header-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px 6px;
  border-bottom: 1px solid rgba(31,31,31,0.06);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark,
.brand-logo {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.brand-text {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.5px;
}

/* ===== Navigation ===== */
.site-nav {
  display: flex;
  justify-content: center;
  padding: 8px 24px 10px;
}

.site-nav ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
  justify-content: center;
}

.site-nav ol li {
  display: block;
}

.site-nav ol li a {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  min-height: 44px;
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  font-family: 'Fredoka', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.site-nav ol li a:hover,
.site-nav ol li a:focus-visible {
  background: var(--ink);
  color: var(--white);
  transform: translateY(-1px);
  outline: none;
}

/* ===== Main Layout ===== */
main {
  min-height: 70vh;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero Section ===== */
.hero-section {
  padding: 0;
  margin: 32px 0 24px;
}

.hero-article {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  min-height: 70vh;
  position: relative;
  overflow: hidden;
}

.hero-article::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f9f9f9 0%, #ffffff 60%, #f0f0f0 100%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  flex: 1;
  max-width: 560px;
}

.hero-badge {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-family: 'Fredoka', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.badge-secondary {
  background: #e0e0e0;
  color: var(--ink);
}

.hero-content h1 {
  font-family: 'Fredoka', sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--ink-light);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 480px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  min-height: 48px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-family: 'Fredoka', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.hero-cta:hover,
.hero-cta:focus-visible {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(31,31,31,0.2);
  outline: none;
}

.hero-illustration {
  position: relative;
  z-index: 1;
  flex: 0 0 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  object-fit: cover;
}

.hero-icon-fallback {
  width: 220px;
  height: 220px;
}

.icon-circle {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.06);
}

.icon-glyph {
  font-size: 4rem;
  color: var(--ink);
  opacity: 0.7;
}

/* ===== Content Section — Bento Layout ===== */
.content-section {
  margin-bottom: 48px;
}

.content-article {
  width: 100%;
}

.bento-content-wrap {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--gap);
  align-items: start;
}

/* ===== Page Content Area ===== */
.page-content-area {
  min-width: 0;
}

/* Sections inside page.content — Bento grid feel */
.page-content-area article {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 36px 40px;
  margin-bottom: var(--gap);
  transition: box-shadow var(--transition), transform var(--transition);
  scroll-margin-top: 110px;
}

.page-content-area article:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.page-content-area article:first-child {
  grid-column: span 2;
}

.page-content-area h2 {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  line-height: 1.3;
}

.page-content-area h3 {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
  margin: 18px 0 10px;
}

.page-content-area p {
  font-size: 1rem;
  line-height: 1.75;
  color: #333;
  margin-bottom: 12px;
}

.page-content-area ul,
.page-content-area ol {
  padding-left: 1.4em;
  margin-bottom: 14px;
}

.page-content-area li {
  margin-bottom: 6px;
  line-height: 1.65;
  font-size: 1rem;
}

.page-content-area a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--transition);
}

.page-content-area a:hover {
  opacity: 0.65;
}

.page-content-area small {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 6px;
  font-family: 'Fredoka', sans-serif;
}

/* small before h2/h3 eyebrow pattern */
.page-content-area small + h2,
.page-content-area small + h3 {
  margin-top: 4px;
}

.page-content-area time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-bottom: 10px;
}

/* ===== Aside ===== */
.content-aside {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  position: sticky;
  top: 110px;
}

.aside-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 24px;
  transition: box-shadow var(--transition);
}

.aside-card:hover {
  box-shadow: var(--card-shadow-hover);
}

.aside-eyebrow {
  display: block;
  font-family: 'Fredoka', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.aside-title,
.aside-tip-title {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.aside-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-nav-link {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  min-height: 44px;
  border-radius: 12px;
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background var(--transition), transform var(--transition);
}

.aside-nav-link:hover {
  background: var(--ink);
  color: var(--white);
  transform: translateX(3px);
}

.aside-tip-card p {
  font-size: 0.9rem;
  color: var(--ink-light);
  line-height: 1.6;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink);
  color: var(--white);
  padding: 0;
  margin-top: 56px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 1.6fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 32px 40px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-brand-name {
  font-family: 'Fredoka', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
}

.footer-tagline {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

.footer-form-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-eyebrow {
  display: block;
  font-family: 'Fredoka', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 2px;
}

.footer-form-title,
.footer-links-title {
  font-family: 'Fredoka', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.footer-contact-email a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  text-decoration: underline;
  transition: color var(--transition);
}

.footer-contact-email a:hover {
  color: var(--white);
}

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

.footer-form input[type="email"],
.footer-form textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.07);
  color: var(--white);
  font-family: 'Nunito', sans-serif;
  font-size: 0.9rem;
  resize: none;
  transition: border-color var(--transition);
}

.footer-form input[type="email"]::placeholder,
.footer-form textarea::placeholder {
  color: rgba(255,255,255,0.35);
}

.footer-form input[type="email"]:focus,
.footer-form textarea:focus {
  outline: none;
  border-color: rgba(255,255,255,0.4);
}

.footer-form button {
  align-self: flex-start;
  padding: 10px 24px;
  min-height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.4);
  background: transparent;
  color: var(--white);
  font-family: 'Fredoka', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.footer-form button:hover,
.footer-form button:focus-visible {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.7);
  outline: none;
}

.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-dl {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-dl dt,
.footer-dl dd {
  font-size: 0.88rem;
}

.footer-dl dt a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--transition);
  padding: 5px 0;
  display: inline-block;
  min-height: 40px;
  line-height: 1.6;
}

.footer-dl dt a:hover {
  color: var(--white);
}

.footer-dl dt span {
  color: rgba(255,255,255,0.6);
}

.footer-dl dd {
  color: rgba(255,255,255,0.4);
  padding-left: 8px;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 32px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}

/* ===== Scroll Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ===== Glass card utility ===== */
.glass {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.5);
}

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

/* Tablet: ≤900px */
@media (max-width: 900px) {
  .bento-content-wrap {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .aside-card {
    flex: 1;
    min-width: 260px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }
}

/* Mobile: ≤600px */
@media (max-width: 600px) {
  :root {
    --card-radius: 18px;
  }

  .header-brand {
    padding: 12px 16px 6px;
  }

  .brand-text {
    font-size: 1.25rem;
  }

  .site-nav {
    padding: 6px 12px 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav ol {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 6px;
  }

  .site-nav ol li a {
    padding: 10px 14px;
    min-height: 44px;
    font-size: 0.88rem;
    white-space: nowrap;
  }

  .wrap {
    padding: 0 12px;
  }

  .hero-article {
    flex-direction: column;
    padding: 32px 24px;
    min-height: 70vh;
    gap: 24px;
  }

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

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-illustration {
    flex: 0 0 auto;
    width: 120px;
    height: 120px;
  }

  .icon-circle {
    width: 100px;
    height: 100px;
  }

  .icon-glyph {
    font-size: 2.5rem;
  }

  .page-content-area article {
    padding: 24px 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    padding: 32px 16px 28px;
    gap: 24px;
  }

  .footer-brand-col {
    grid-column: auto;
  }

  .content-aside {
    flex-direction: column;
  }

  .aside-card {
    min-width: unset;
  }

  .footer-bottom {
    padding: 16px;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== Focus Visible ===== */
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}