:root {
    --pink-bg: #fff5f8;
    --pink-light: #ffe3ed;
    --pink-main: #ff7eb3;
    --pink-deep: #e0568a;
    --pink-dark: #b8305f;
    --text-main: #4a2c3a;
    --text-sub: #8a6274;
    --white: #ffffff;
    --radius: 20px;
    --shadow: 0 8px 24px rgba(224, 86, 138, 0.12);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--pink-bg);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  
  /* Header */
  .site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 245, 248, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--pink-light);
  }
  .header-inner {
    max-width: 1200px; margin: 0 auto; padding: 12px 20px;
    display: flex; align-items: center; justify-content: space-between; gap: 20px;
  }
  .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--pink-dark); }
  .brand img { height: 34px; width: auto; border-radius: 8px; }
  .nav-links { display: flex; gap: 22px; font-size: 15px; font-weight: 500; color: var(--text-sub); overflow-x: auto; white-space: nowrap; }
  .nav-links a:hover { color: var(--pink-deep); }
  .header-btn {
    background: linear-gradient(135deg, var(--pink-main), var(--pink-deep));
    color: var(--white); padding: 8px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
    box-shadow: 0 4px 12px rgba(224, 86, 138, 0.3);
  }
  
  /* Common */
  .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
  section { padding: 64px 0; }
  .section-title { text-align: center; margin-bottom: 40px; }
  .section-title h2 { font-size: 28px; color: var(--pink-dark); margin-bottom: 10px; }
  .section-title p { font-size: 15px; color: var(--text-sub); }
  .card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }

  /* Hero */
  .hero {
    background: linear-gradient(160deg, #ffeaf2 0%, #ffd6e5 100%);
    padding: 60px 0 80px;
    position: relative;
  }
  .hero-inner { display: flex; align-items: center; gap: 50px; flex-wrap: wrap; }
  .hero-text { flex: 1 1 400px; }
  .hero-text h1 { font-size: 38px; line-height: 1.3; color: var(--pink-dark); margin-bottom: 18px; }
  .hero-text h1 span { color: var(--pink-deep); }
  .hero-text p { font-size: 16px; color: var(--text-sub); margin-bottom: 26px; max-width: 520px; }
  .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
  .btn-primary {
    display: inline-block; background: linear-gradient(135deg, var(--pink-main), var(--pink-deep));
    color: var(--white); padding: 14px 32px; border-radius: 999px; font-size: 16px; font-weight: 600;
    box-shadow: 0 6px 18px rgba(224, 86, 138, 0.35); transition: transform 0.2s;
  }
  .btn-primary:hover { transform: translateY(-2px); }
  .btn-ghost {
    display: inline-block; padding: 14px 32px; border-radius: 999px; font-size: 16px; font-weight: 600;
    border: 2px solid var(--pink-main); color: var(--pink-deep);
  }
  .hero-visual {
    flex: 1 1 300px; display: flex; justify-content: center; gap: 18px;
  }
  .hero-visual img {
    width: 165px; border-radius: 18px; box-shadow: var(--shadow); border: 4px solid var(--white);
  }
  .hero-visual img:first-child { transform: rotate(-6deg) translateY(10px); }
  .hero-visual img:last-child { transform: rotate(6deg); }

  /* Features */
  .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .feature-card { padding: 30px 24px; background: var(--white); border-radius: var(--radius); border: 1px solid var(--pink-light); }
  .feature-icon { width: 50px; height: 50px; border-radius: 14px; background: var(--pink-light); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
  .feature-card h3 { font-size: 18px; color: var(--pink-dark); margin-bottom: 8px; }
  .feature-card p { font-size: 14px; color: var(--text-sub); }

  /* Rotating Carousel */
  .carousel-wrap { position: relative; max-width: 700px; margin: 0 auto; height: 460px; display: flex; align-items: center; justify-content: center; }
  .carousel-item {
    position: absolute; width: 240px; height: 400px; border-radius: 20px; overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2); transition: all 0.5s ease; border: 5px solid var(--white);
  }
  .carousel-item img { width: 100%; height: 100%; object-fit: cover; }
  .carousel-item.active { z-index: 5; transform: scale(1.05); opacity: 1; }
  .carousel-item.prev { z-index: 3; transform: translateX(-140px) scale(0.85) rotate(-8deg); opacity: 0.7; }
  .carousel-item.next { z-index: 3; transform: translateX(140px) scale(0.85) rotate(8deg); opacity: 0.7; }
  .carousel-item.hide { z-index: 1; transform: scale(0.7); opacity: 0; }
  .carousel-controls { text-align: center; margin-top: 20px; }
  .carousel-btn { display: inline-block; padding: 8px 20px; border-radius: 999px; background: var(--pink-light); color: var(--pink-dark); font-weight: 600; font-size: 14px; margin: 0 8px; cursor: pointer; }

  /* Ranking */
  .rank-list { display: flex; flex-direction: column; gap: 14px; max-width: 800px; margin: 0 auto; }
  .rank-item { display: flex; align-items: center; gap: 16px; background: var(--white); padding: 16px 20px; border-radius: 16px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
  .rank-num { font-size: 22px; font-weight: 800; color: var(--pink-deep); width: 36px; text-align: center; font-style: italic; }
  .rank-item img { width: 50px; height: 66px; object-fit: cover; border-radius: 8px; }
  .rank-info h4 { font-size: 16px; color: var(--text-main); margin-bottom: 4px; }
  .rank-info p { font-size: 13px; color: var(--text-sub); }
  .rank-tag { margin-left: auto; font-size: 12px; color: var(--pink-deep); background: var(--pink-light); padding: 4px 10px; border-radius: 999px; }

  /* Calendar */
  .calendar-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
  .cal-card { background: var(--white); border-radius: 16px; padding: 16px; text-align: center; border: 1px solid var(--pink-light); }
  .cal-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 12px; margin-bottom: 12px; }
  .cal-day { font-size: 15px; font-weight: 800; color: var(--pink-deep); margin-bottom: 4px; }
  .cal-title { font-size: 13px; color: var(--text-main); }

  /* Wall */
  .wall-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .wall-grid img { width: 100%; height: 260px; object-fit: cover; border-radius: 16px; transition: transform 0.3s; }
  .wall-grid img:hover { transform: scale(1.03); }

  /* Interactive */
  .interactive-box { background: linear-gradient(135deg, var(--pink-main), var(--pink-deep)); border-radius: var(--radius); padding: 48px 30px; text-align: center; color: var(--white); }
  .interactive-box h2 { font-size: 28px; margin-bottom: 12px; }
  .interactive-box p { font-size: 15px; margin-bottom: 24px; opacity: 0.9; }
  .interactive-btn { background: var(--white); color: var(--pink-deep); padding: 12px 32px; border-radius: 999px; font-weight: 700; font-size: 16px; display: inline-block; cursor: pointer; border: none; }

  /* FAQ */
  .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
  .faq-item { background: var(--white); border-radius: 16px; padding: 20px 24px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
  .faq-item h3 { font-size: 16px; color: var(--pink-dark); margin-bottom: 8px; }
  .faq-item p { font-size: 14px; color: var(--text-sub); }

  /* Footer */
  .site-footer { background: #f7e4ec; padding: 40px 0 30px; text-align: center; color: var(--text-sub); font-size: 13px; margin-top: 40px; }
  .site-footer p { margin-bottom: 8px; }
  .site-footer a { color: var(--text-sub); text-decoration: underline; }
  .search-tags { max-width: 900px; margin: 0 auto 24px; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
  .search-tags span { background: var(--white); padding: 4px 14px; border-radius: 999px; font-size: 12px; color: var(--text-sub); }
  
  @media (max-width: 1024px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .calendar-grid { grid-template-columns: repeat(3, 1fr); }
    .wall-grid { grid-template-columns: repeat(3, 1fr); }
  }
  @media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; }
    .nav-links { order: 3; width: 100%; padding-top: 10px; justify-content: flex-start; }
    .hero-text h1 { font-size: 28px; }
    .hero-visual { display: none; }
    .feature-grid { grid-template-columns: 1fr; }
    .carousel-wrap { height: 380px; }
    .carousel-item { width: 180px; height: 300px; }
    .calendar-grid { grid-template-columns: repeat(2, 1fr); }
    .wall-grid { grid-template-columns: repeat(2, 1fr); }
    .wall-grid img { height: 200px; }
    .rank-item { padding: 12px; }
    .interactive-box { padding: 30px 20px; }
  }