/* ==========================================================
   初体验3 · 清纯美少女 · 三重心动初体验
   Design System — "Minty Coral Bubble"
   薄荷珊瑚 · 柔软流体 · 心动卡片
   ========================================================== */

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

:root {
  --mint-50: #F0FAF6;
  --mint-100: #E0F5EC;
  --mint-200: #C2EBD9;
  --mint-400: #7FCDAF;
  --mint-600: #3E8F73;
  --coral: #FF7F5C;
  --coral-light: #FFA58A;
  --butter: #FFE05C;
  --cream: #FFFDF7;
  --ink: #2B4A42;
  --ink-soft: #5C7A71;
  --white: #FFFFFF;
  --shadow-sm: 0 4px 16px rgba(62, 143, 115, 0.08);
  --shadow-md: 0 10px 30px rgba(62, 143, 115, 0.14);
  --shadow-lg: 0 16px 48px rgba(62, 143, 115, 0.18);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
}

/* ==========================================================
   核心布局
   ========================================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--mint-50), #F6FBF8);
}

/* ==========================================================
   导航 — 薄荷玻璃气泡
   ========================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 253, 247, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(127, 205, 175, 0.25);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--coral), var(--butter), var(--mint-400));
  opacity: 0.4;
  filter: blur(4px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--coral), var(--butter));
  color: var(--ink);
  box-shadow: 0 4px 12px rgba(255, 127, 92, 0.35);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav li {
  position: relative;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  transition: color 0.25s;
  position: relative;
  padding: 4px 2px;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--coral);
  transition: width 0.35s cubic-bezier(0.65, 0, 0.35, 1);
}

.main-nav a:not(.nav-cta):hover {
  color: var(--ink);
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 9px 22px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--coral), var(--coral-light));
  color: var(--ink) !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 14px rgba(255, 127, 92, 0.35);
  transition: transform 0.25s, box-shadow 0.25s;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 127, 92, 0.45);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: var(--mint-100);
  border: 1px solid rgba(127, 205, 175, 0.4);
  border-radius: 12px;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle::before,
.menu-toggle::after {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s;
}

.menu-toggle::after {
  width: 14px;
}

.menu-toggle:hover::before,
.menu-toggle:hover::after {
  background: var(--coral);
}

/* ==========================================================
   Hero — 蜜桃气泡 + 薄荷光斑
   ========================================================== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(145deg, var(--cream) 0%, var(--mint-50) 60%, #EAF8F1 100%);
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  width: 560px;
  height: 560px;
  right: -140px;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 224, 92, 0.35), rgba(168, 230, 207, 0.5) 70%);
  filter: blur(8px);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  left: -60px;
  bottom: -60px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(255, 127, 92, 0.2), transparent 70%);
  z-index: 0;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--mint-200), var(--mint-100));
  color: var(--ink);
  border: 1px solid rgba(127, 205, 175, 0.4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 22px;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--ink);
}

.hero h1 .text-accent {
  position: relative;
  display: inline-block;
}

.hero h1 .text-accent::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 10px;
  background: rgba(255, 224, 92, 0.6);
  border-radius: 4px;
  z-index: -1;
}

.hero p {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  z-index: 1;
  border-radius: 30px;
  overflow: hidden;
  padding: 14px;
  background: linear-gradient(145deg, var(--mint-100), var(--cream));
  border: 1px solid rgba(127, 205, 175, 0.35);
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
  transition: transform 0.5s ease;
}

.hero-image:hover {
  transform: rotate(0deg) translateY(-4px);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle, var(--butter) 30%, transparent 60%);
  opacity: 0.7;
  z-index: 2;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 22px;
  display: block;
  object-fit: cover;
}

/* ==========================================================
   按钮
   ========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--coral), var(--coral-light));
  color: var(--ink);
  box-shadow: 0 6px 20px rgba(255, 127, 92, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255, 127, 92, 0.5);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--mint-600);
  color: var(--mint-600);
}

.btn-outline:hover {
  background: var(--mint-50);
  border-color: var(--coral);
  color: var(--coral);
  transform: translateY(-3px);
}

/* ==========================================================
   标签 / 标题
   ========================================================== */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  margin-bottom: 14px;
  color: var(--coral);
  text-transform: uppercase;
  background: rgba(255, 127, 92, 0.1);
  padding: 5px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 14px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 5px;
  background: linear-gradient(90deg, var(--coral), var(--butter));
  border-radius: 4px;
  margin-top: 12px;
}

.section-description,
.section-desc {
  max-width: 600px;
  color: var(--ink-soft);
  margin-bottom: 40px;
  line-height: 1.8;
}

/* ==========================================================
   卡片网格 — 糖果气泡卡片
   ========================================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  background: var(--white);
  border: 1px solid rgba(127, 205, 175, 0.3);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--butter), var(--mint-400));
  opacity: 0;
  transition: opacity 0.3s;
}

.category-card:hover {
  transform: translateY(-8px) rotate(-1deg);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 127, 92, 0.4);
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--mint-100), var(--butter));
  box-shadow: inset 0 1px 3px rgba(255,255,255,0.6);
}

.category-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--ink);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.3s;
}

.card-link:hover {
  gap: 10px;
}

/* ==========================================================
   特性块
   ========================================================== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature-image {
  border-radius: 30px;
  overflow: hidden;
  padding: 12px;
  background: linear-gradient(145deg, var(--mint-100), var(--butter));
  box-shadow: var(--shadow-md);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  bottom: 20px;
  left: 20px;
  width: 60px;
  height: 60px;
  border: 3px solid rgba(255, 127, 92, 0.4);
  border-radius: 50%;
  z-index: 2;
}

.feature-image img {
  width: 100%;
  height: auto;
  border-radius: 22px;
  display: block;
  object-fit: cover;
}

.feature-text {
  position: relative;
}

.feature-text .section-title {
  font-size: 1.8rem;
}

.feature-text p {
  color: var(--ink-soft);
  margin-bottom: 20px;
  line-height: 1.8;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--ink);
  border-bottom: 1px dashed rgba(127, 205, 175, 0.3);
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: var(--coral);
  font-size: 1.1rem;
}

/* ==========================================================
   数据条 — 薄荷胶囊统计
   ========================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid rgba(127, 205, 175, 0.25);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--butter));
  border-radius: 0 0 4px 4px;
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--coral);
  line-height: 1.1;
  display: block;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* ==========================================================
   内容墙 — 照片卡片墙
   ========================================================== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(127, 205, 175, 0.25);
  padding: 10px;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 127, 92, 0.35);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}

.content-wall-body {
  padding: 16px 10px 12px;
}

.content-wall-body h3 {
  font-size: 1rem;
  color: var(--ink);
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ==========================================================
   FAQ
   ========================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(127, 205, 175, 0.3);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item:hover {
  border-color: rgba(255, 127, 92, 0.4);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: var(--coral);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--coral);
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  color: var(--ink-soft);
  line-height: 1.8;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================
   CTA 横幅
   ========================================================== */
.cta-banner {
  padding: 64px 24px;
  text-align: center;
  border-radius: 32px;
  background: linear-gradient(120deg, var(--mint-200), var(--mint-100) 40%, var(--coral-light));
  color: var(--ink);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  top: -60px;
  left: -40px;
  border-radius: 50%;
  background: rgba(255, 224, 92, 0.4);
  filter: blur(4px);
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  bottom: -40px;
  right: -20px;
  border-radius: 50%;
  background: rgba(255, 127, 92, 0.3);
  filter: blur(4px);
}

.cta-banner h2 {
  color: var(--ink);
  font-size: 2rem;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cta-banner p {
  max-width: 420px;
  margin: 0 auto 28px;
  color: var(--ink-soft);
  position: relative;
  z-index: 1;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: var(--ink);
  color: var(--mint-50);
  box-shadow: 0 6px 20px rgba(43, 74, 66, 0.3);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(43, 74, 66, 0.4);
}

/* ==========================================================
   页脚 — 薄荷涟漪
   ========================================================== */
.site-footer {
  padding: 64px 0 28px;
  background: linear-gradient(120deg, var(--mint-100), var(--mint-50));
  border-top: 1px solid rgba(127, 205, 175, 0.25);
  position: relative;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

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

.footer-brand {
  max-width: 280px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
  letter-spacing: 0.06em;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-decoration: none;
  margin-bottom: 10px;
  transition: all 0.25s;
}

.footer-col a:hover {
  color: var(--coral);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(62, 143, 115, 0.15);
  margin-top: 48px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ==========================================================
   工具类
   ========================================================== */
.text-accent {
  color: var(--coral);
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ==========================================================
   额外视觉细节
   ========================================================== */
::selection {
  background: var(--butter);
  color: var(--ink);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--mint-50);
}

::-webkit-scrollbar-thumb {
  background: var(--mint-400);
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--mint-600);
}

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 900px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-image {
    margin-top: 40px;
    transform: none;
    max-width: 520px;
  }
}

@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }

  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(255, 253, 247, 0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    align-items: flex-start;
    gap: 18px;
    border-bottom: 1px solid rgba(127, 205, 175, 0.25);
    box-shadow: var(--shadow-lg);
  }

  .main-nav.open {
    display: flex;
    animation: fadeIn 0.3s ease;
  }

  .menu-toggle {
    display: flex;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 7vw, 2.6rem);
  }

  .hero::before {
    width: 360px;
    height: 360px;
    right: -120px;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding-top: 100px;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .cta-banner {
    padding: 48px 20px;
    border-radius: 24px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

  .stat-item {
    padding: 24px 16px;
  }

  .stat-number {
    font-size: 1.8rem;
  }
}