/* ============================================
   五 一 吃 西 瓜 · 盛夏美学设计系统
   wuyichixg.cn
   「瓜瓤美学」：奶油底 × 瓜瓤红 × 瓜皮绿
   ============================================ */

:root {
  --melon: #FF5A5F;
  --melon-deep: #E84855;
  --melon-dark: #C9184A;
  --melon-pale: #FFF0F3;
  --melon-blush: #FFE5E5;
  --rind: #00A878;
  --rind-deep: #008A63;
  --rind-pale: #E8F8F1;
  --cream: #FFF9F2;
  --ink: #2D2A32;
  --ink-soft: rgba(45, 42, 50, 0.65);
  --shadow-melon: 0 12px 40px rgba(255, 90, 95, 0.15);
  --shadow-rind: 0 12px 40px rgba(0, 168, 120, 0.12);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--cream);
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 168, 120, 0.03) 1px, transparent 0);
  background-size: 24px 24px;
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* 自定义滚瓜瓤滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--cream);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--rind) 0%, var(--melon) 100%);
  border-radius: 20px;
  border: 2px solid var(--cream);
}
::selection {
  background: var(--melon);
  color: #fff;
}

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

.section {
  padding: 90px 0;
  position: relative;
}
.section:nth-child(even) {
  background: var(--rind-pale);
}

/* --------------------------------------------------
   顶部导航 — 瓜田小屋
-------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 242, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 168, 120, 0.12);
  border-radius: 0 0 24px 24px;
  box-shadow: 0 2px 20px rgba(255, 90, 95, 0.06);
}
.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--rind) 0%, var(--rind) 33%, var(--melon) 33%, var(--melon) 66%, #FFB84E 66%, #FFB84E 100%);
  border-radius: 0 0 6px 6px;
  z-index: 10;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.5px;
  font-family: 'Songti SC', 'SimSun', serif;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
  background: linear-gradient(180deg, var(--rind) 0% 35%, #fff 35% 45%, var(--melon) 45% 100%);
  box-shadow: 0 4px 12px rgba(0, 168, 120, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  overflow: hidden;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  padding: 6px 2px;
  position: relative;
  transition: color 0.25s;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--rind), var(--melon));
  border-radius: 4px;
  transform: translateX(-50%);
  transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.main-nav a:hover {
  color: var(--melon-deep);
}
.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  color: #fff !important;
  font-weight: 700;
  padding: 10px 26px !important;
  border-radius: 100px !important;
  box-shadow: 0 4px 18px rgba(255, 90, 95, 0.32);
  transition: all 0.3s !important;
}
.nav-cta::after {
  display: none !important;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 90, 95, 0.42) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--rind);
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  box-shadow: 0 4px 14px rgba(0, 168, 120, 0.3);
}
.menu-toggle::before {
  content: '';
  width: 20px;
  height: 2px;
  background: #fff;
  box-shadow: 0 -6px 0 #fff, 0 6px 0 #fff;
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle:hover {
  transform: scale(1.05);
}

/* --------------------------------------------------
   首页 Hero — 正午瓜田的清风
-------------------------------------------------- */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 60px;
  padding: 120px 24px 80px;
  position: relative;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 229, 229, 0.5) 0%, transparent 40%),
    radial-gradient(circle at 82% 72%, rgba(232, 248, 241, 0.8) 0%, transparent 45%),
    var(--cream);
}
.hero .container {
  display: flex;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-content {
  flex: 1;
  min-width: 0;
  max-width: 680px;
}

.hero-eyebrow {
  display: inline-block;
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 7px 20px;
  border-radius: 100px;
  margin-bottom: 18px;
  box-shadow: 0 4px 18px rgba(255, 90, 95, 0.32);
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  margin-right: 8px;
  vertical-align: 2px;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-family: 'Songti SC', 'STSong', 'SimSun', serif;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 22px;
  color: var(--ink);
}
.hero h1::after {
  content: '';
  display: block;
  width: 90px;
  height: 7px;
  margin-top: 20px;
  background: linear-gradient(90deg, var(--rind) 0%, var(--melon) 100%);
  border-radius: 20px;
  box-shadow: 0 4px 14px rgba(255, 90, 95, 0.28);
}

.hero p {
  font-size: 1.15rem;
  color: var(--ink-soft);
  line-height: 1.85;
  margin-bottom: 34px;
  padding-left: 18px;
  border-left: 3px solid var(--melon);
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  align-items: center;
}

.hero-image {
  flex: 1;
  min-width: 280px;
  max-width: 460px;
  position: relative;
  border-radius: 38% 62% 58% 42% / 42% 38% 62% 58%;
  overflow: hidden;
  box-shadow: 0 30px 70px -15px rgba(255, 90, 95, 0.3);
  border: 10px solid #fff;
  transform: rotate(2deg);
  animation: melon-float 6s ease-in-out infinite;
  background: linear-gradient(135deg, var(--rind-pale), var(--melon-blush));
}
.hero-image::before {
  content: '';
  position: absolute;
  inset: 24px -18px -18px 24px;
  background: linear-gradient(135deg, var(--rind), var(--rind-deep));
  border-radius: 55% 45% 60% 40% / 50% 55% 45% 50%;
  z-index: -1;
  opacity: 0.3;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: inherit;
  transition: transform 0.5s ease;
}
.hero-image:hover img {
  transform: scale(1.04) rotate(-1deg);
}

@keyframes melon-float {
  0%, 100% {
    transform: rotate(2deg) translateY(0);
  }
  50% {
    transform: rotate(2deg) translateY(-12px);
  }
}

/* --------------------------------------------------
   按钮 — 多汁的点击
-------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 60px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 90, 95, 0.35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(255, 90, 95, 0.45);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--rind);
  color: var(--rind-deep);
}
.btn-outline:hover {
  background: var(--rind-pale);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 168, 120, 0.15);
}

/* --------------------------------------------------
   标签 / 标题
-------------------------------------------------- */
.section-label {
  display: inline-block;
  background: var(--rind-pale);
  color: var(--rind-deep);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 20px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.section-label::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  margin-right: 8px;
  vertical-align: 1px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-family: 'Songti SC', 'STSong', 'SimSun', serif;
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.section-desc {
  max-width: 600px;
  color: var(--ink-soft);
  margin-bottom: 44px;
  font-size: 1rem;
  line-height: 1.8;
}

/* --------------------------------------------------
   卡片网格 — 夏日瓜摊
-------------------------------------------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  background: #fff;
  border-radius: 24px;
  padding: 32px 28px;
  border: 1px solid rgba(0, 168, 120, 0.08);
  box-shadow: 0 6px 30px rgba(45, 42, 50, 0.04);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}
.category-card::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 95, 0.08) 0%, transparent 70%);
  top: -30px;
  right: -30px;
  transition: transform 0.4s ease;
}
.category-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: 0 24px 50px rgba(255, 90, 95, 0.1);
  border-color: rgba(0, 168, 120, 0.25);
}
.category-card:hover::after {
  transform: scale(1.4);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--rind), var(--rind-deep));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(0, 168, 120, 0.25);
  transition: all 0.3s ease;
}
.category-card:nth-child(1) .card-icon {
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  box-shadow: 0 8px 20px rgba(255, 90, 95, 0.28);
}
.category-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, var(--rind), #00C896);
}
.category-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, #FF9E42, #FF6B35);
  box-shadow: 0 8px 20px rgba(255, 110, 53, 0.25);
}
.category-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, #4A7BEF, #6C9EFF);
}
.category-card:hover .card-icon {
  transform: rotate(-6deg) scale(1.08);
}

.card-link {
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--melon-deep);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  transition: gap 0.2s ease;
}
.card-link::after {
  content: '→';
  transition: transform 0.25s ease;
}
.category-card:hover .card-link::after {
  transform: translateX(5px);
}
.card-link:hover {
  color: var(--melon-dark);
}

/* --------------------------------------------------
   特性块
-------------------------------------------------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
  border: 8px solid #fff;
  position: relative;
}
.feature-image::before {
  content: '';
  position: absolute;
  inset: 16px -16px -16px 16px;
  background: linear-gradient(135deg, var(--melon-blush), var(--rind-pale));
  border-radius: 28px;
  z-index: -1;
}
.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 22px;
}

.feature-text h3 {
  font-size: 1.6rem;
  font-family: 'Songti SC', serif;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--ink);
}
.feature-text > p {
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.feature-list {
  list-style: none;
  margin-top: 22px;
}
.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 500;
  color: var(--ink);
}
.feature-list li::before {
  content: '';
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
  background: linear-gradient(180deg, var(--rind) 0% 30%, #fff 30% 45%, var(--melon) 45% 100%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.25s ease;
}
.feature-list li:hover::before {
  transform: scale(1.15) rotate(15deg);
}

/* --------------------------------------------------
   数据条 — 瓜田收成
-------------------------------------------------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px 26px;
  border-radius: 24px;
  border: 1px solid rgba(0, 168, 120, 0.1);
  background: #fff;
  position: relative;
  transition: all 0.35s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
.stat-item::before {
  content: '';
  display: block;
  width: 32px;
  height: 32px;
  margin: 0 auto 14px;
  border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
  background: linear-gradient(180deg, var(--rind) 0% 28%, #fff 28% 44%, var(--melon) 44% 100%);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(255, 90, 95, 0.1);
  border-color: rgba(255, 90, 95, 0.2);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--melon);
  font-family: 'Songti SC', serif;
}
.stat-label {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-top: 8px;
  font-weight: 500;
  color: var(--ink);
}

/* --------------------------------------------------
   内容墙 — 新闻资讯瓜报
-------------------------------------------------- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(0, 168, 120, 0.08);
  background: #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 45px rgba(255, 90, 95, 0.12);
  border-color: rgba(0, 168, 120, 0.2);
}
.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.content-wall-item:hover img {
  transform: scale(1.06);
}

.content-wall-body {
  padding: 24px;
}
.content-wall-body time {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--rind-deep);
  background: var(--rind-pale);
  padding: 3px 12px;
  border-radius: 50px;
  margin-bottom: 10px;
}
.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  transition: color 0.25s;
  font-family: 'Songti SC', serif;
}
.content-wall-item:hover .content-wall-body h3 {
  color: var(--rind-deep);
}
.content-wall-body p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 6px;
  line-height: 1.7;
}

/* --------------------------------------------------
   FAQ — 吃瓜答疑
-------------------------------------------------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(0, 168, 120, 0.12);
  border-radius: 18px;
  margin-bottom: 12px;
  overflow: hidden;
  background: #fff;
  transition: all 0.35s ease;
}
.faq-item.open {
  border-color: rgba(255, 90, 95, 0.3);
  box-shadow: 0 10px 30px rgba(255, 90, 95, 0.1);
}
.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 16px;
  transition: color 0.25s;
}
.faq-item .faq-question::after {
  content: '+';
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--rind-pale);
  color: var(--rind-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.35s ease;
}
.faq-item.open .faq-question::after {
  content: '−';
  background: linear-gradient(135deg, var(--melon), var(--melon-deep));
  color: #fff;
  transform: rotate(180deg);
}
.faq-item.open .faq-question {
  color: var(--melon-deep);
}
.faq-item .faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  color: var(--ink-soft);
  line-height: 1.8;
  transition: max-height 0.45s ease, opacity 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
  opacity: 0.75;
}

/* --------------------------------------------------
   CTA 横幅 — 红色多汁号召
-------------------------------------------------- */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: 36px;
  color: #fff;
  background: linear-gradient(120deg, var(--rind) 0%, #00C896 40%, var(--melon) 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 168, 120, 0.25);
}
.cta-banner::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  top: -80px;
  right: -60px;
  z-index: 0;
}
.cta-banner::after {
  content: '';
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.05);
  bottom: -50px;
  left: -30px;
  z-index: 0;
}
.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  margin-bottom: 12px;
  font-family: 'Songti SC', 'STSong', serif;
  font-weight: 900;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}
.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary {
  background: #fff;
  color: var(--melon-deep);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

/* --------------------------------------------------
   页脚 — 瓜田边的小屋
-------------------------------------------------- */
.site-footer {
  padding: 64px 0 30px;
  background: var(--rind-pale);
  border-radius: 44px 44px 0 0;
  margin-top: 80px;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 0;
  width: 100%;
  height: 20px;
  background: linear-gradient(90deg, var(--melon) 0%, var(--rind) 100%);
  border-radius: 20px 20px 0 0;
  opacity: 0.6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 280px;
  font-size: 0.92rem;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--ink);
  letter-spacing: 0.5px;
}
.footer-col h4::after {
  content: '';
  display: block;
  width: 28px;
  height: 3px;
  margin-top: 10px;
  background: linear-gradient(90deg, var(--rind), var(--melon));
  border-radius: 4px;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  transition: all 0.25s ease;
}
.footer-col a:hover {
  color: var(--melon-deep);
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid rgba(0, 168, 120, 0.15);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.footer-bottom a {
  color: var(--rind-deep);
  text-decoration: none;
  font-weight: 600;
}
.footer-bottom a:hover {
  color: var(--melon-deep);
}

/* --------------------------------------------------
   工具类
-------------------------------------------------- */
.text-accent {
  color: var(--melon-deep);
  font-weight: 700;
  background: linear-gradient(180deg, transparent 60%, var(--melon-blush) 60%);
  padding: 0 4px;
  border-radius: 2px;
}
.text-center {
  text-align: center;
}

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

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

/* --------------------------------------------------
   响应式 — 瓜田随气候变化
-------------------------------------------------- */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--cream);
    padding: 28px 24px;
    border-bottom: 3px solid var(--melon);
    border-radius: 0 0 24px 24px;
    box-shadow: 0 30px 50px rgba(0, 0, 0, 0.08);
    gap: 12px;
    backdrop-filter: blur(20px);
  }
  .main-nav.open a {
    font-size: 1.05rem;
    padding: 12px 4px;
    border-bottom: 1px dashed rgba(0, 168, 120, 0.12);
  }
  .main-nav.open .nav-cta {
    border-bottom: none;
    text-align: center;
    margin-top: 10px;
  }

  .hero {
    flex-direction: column;
    gap: 40px;
    text-align: center;
    padding: 120px 24px 60px;
  }
  .hero .container {
    flex-direction: column;
    gap: 40px;
  }
  .hero-content {
    margin: 0 auto;
  }
  .hero h1::after {
    margin-left: auto;
    margin-right: auto;
  }
  .hero p {
    margin-left: auto;
    margin-right: auto;
    padding-left: 0;
    padding-top: 12px;
    border-left: none;
    border-top: 3px solid var(--melon);
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-image {
    max-width: 340px;
    margin: 0 auto;
    width: 100%;
  }

  .site-header {
    border-radius: 0;
  }
  .cta-banner {
    padding: 48px 24px;
  }
  .cta-banner h2 {
    font-size: 1.7rem;
  }
  .section {
    padding: 64px 0;
  }
}

@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;
    width: 100%;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .stat-number {
    font-size: 2rem;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .cta-banner h2 {
    font-size: 1.5rem;
  }
  .feature-block {
    gap: 24px;
  }
}