/* ================================================
   91免费版入口 — 定制设计系统
   "暖砂·苔原" — 有机自然主义现代风
   ================================================ */

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

:root {
  --bg: #F8F3EA;
  --bg-alt: #EFE7DA;
  --bg-deep: #E6DACB;
  --card: #FFFFFF;
  --primary: #264A33;
  --primary-dark: #1A3323;
  --accent: #D95D39;
  --accent-soft: #F2CA9D;
  --sage: #789E8B;
  --sand: #C5B9A8;
  --line: #E4D9CC;
  --text: #264A33;
  --text-muted: #6F8979;
  --radius: 24px;
  --radius-sm: 14px;
  --shadow-sm: 0 2px 12px rgba(40, 75, 51, 0.05);
  --shadow-md: 0 8px 32px rgba(40, 75, 51, 0.08);
  --shadow-lg: 0 16px 48px rgba(40, 75, 51, 0.12);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ========== 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: var(--bg-alt);
}

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 253, 250, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 20px rgba(40, 75, 51, 0.04);
}

.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;
  letter-spacing: -0.03em;
  text-decoration: none;
  color: var(--primary);
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  box-shadow: 0 0 0 4px rgba(38, 74, 51, 0.1);
}

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

.main-nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: color 0.3s ease;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:hover {
  color: var(--accent);
}

.main-nav a:hover::after {
  width: 100%;
}

.main-nav a.nav-cta::after {
  display: none;
}

.nav-cta {
  padding: 9px 22px !important;
  border-radius: 999px;
  background: var(--accent);
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(217, 93, 57, 0.3);
  transition: var(--transition) !important;
}

.nav-cta:hover {
  background: var(--primary);
  box-shadow: 0 6px 20px rgba(38, 74, 51, 0.3);
  color: #fff !important;
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--bg-alt);
  border-radius: 12px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: var(--line);
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--primary);
  position: relative;
  display: block;
  border-radius: 2px;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

/* ========== Hero ========== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, #FAF5EC 0%, #F8EFE3 45%, #FCE8DC 100%);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  right: -8vw;
  top: 50%;
  transform: translateY(-50%);
  width: 38vw;
  height: 38vw;
  max-width: 520px;
  max-height: 520px;
  border: 2.5px dashed rgba(217, 93, 57, 0.3);
  border-radius: 50%;
  pointer-events: none;
  animation: spin 60s linear infinite;
}

.hero::after {
  content: '91';
  position: absolute;
  right: 3vw;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18vw;
  font-weight: 900;
  line-height: 1;
  color: rgba(38, 74, 51, 0.04);
  letter-spacing: -0.05em;
  pointer-events: none;
  user-select: none;
}

@keyframes spin {
  from { transform: translateY(-50%) rotate(0deg); }
  to { transform: translateY(-50%) rotate(360deg); }
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--accent-soft);
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  border: 1px solid rgba(217, 93, 57, 0.2);
}

.hero-eyebrow::before {
  content: '●';
  font-size: 0.5rem;
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--primary-dark);
  margin-bottom: 22px;
}

.hero h1 .text-accent {
  position: relative;
  z-index: 1;
}

.hero h1 .text-accent::after {
  content: '';
  position: absolute;
  left: -4px;
  right: -4px;
  bottom: 4px;
  width: 110%;
  height: 0.18em;
  background: var(--accent-soft);
  border-radius: 4px;
  z-index: -1;
  opacity: 0.65;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text);
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 34px;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

.hero-image {
  position: relative;
  z-index: 2;
  border-radius: 32px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-lg);
  transform: rotate(1.5deg);
  transition: var(--transition);
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.02);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -14px;
  right: -14px;
  width: 70px;
  height: 70px;
  border: 4px solid var(--accent-soft);
  border-radius: 50%;
  opacity: 0.8;
  z-index: 3;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(217, 93, 57, 0.3);
}

.btn-primary:hover {
  background: var(--primary);
  box-shadow: 0 8px 28px rgba(38, 74, 51, 0.35);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217, 93, 57, 0.25);
}

/* ========== 标签/标题 ========== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(217, 93, 57, 0.08);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin-top: 14px;
}

.section-desc {
  max-width: 600px;
  color: var(--text-muted);
  margin-bottom: 44px;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ========== 卡片网格 ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 26px;
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  padding: 30px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: var(--transition);
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  opacity: 0;
  transition: opacity 0.35s ease;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(217, 93, 57, 0.2);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(38, 74, 51, 0.08), rgba(38, 74, 51, 0.02));
  transition: var(--transition);
}

.category-card:hover .card-icon {
  transform: scale(1.1) rotate(-6deg);
  background: linear-gradient(135deg, rgba(217, 93, 57, 0.15), rgba(217, 93, 57, 0.05));
}

.card-link {
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}

.card-link:hover {
  gap: 8px;
}

.card-link::after {
  content: '→';
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

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

.feature-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}

.feature-image::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(217, 93, 57, 0.15), transparent 70%);
  border-radius: 50%;
  z-index: 1;
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-text {
  position: relative;
}

.feature-text h3 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 18px;
  line-height: 1.3;
}

.feature-text > p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text);
  border-bottom: 1px dashed var(--line);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  color: var(--accent);
  background: rgba(217, 93, 57, 0.1);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.8rem;
}

/* ========== 数据条 ========== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: -16px;
  right: -16px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(38, 74, 51, 0.03);
  transition: transform 0.4s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-item:hover::after {
  transform: scale(2.2);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

/* ========== 内容墙 ========== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--line);
  transition: var(--transition);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(217, 93, 57, 0.2);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 22px 24px;
}

.content-wall-body h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--card);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(217, 93, 57, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: rgba(217, 93, 57, 0.3);
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 18px 22px;
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--primary);
  transition: color 0.2s;
}

.faq-item:hover .faq-question {
  color: var(--accent);
}

.faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
  transition: transform 0.3s ease;
}

.faq-item.open .faq-question::after {
  content: '+';
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  padding: 0 22px 18px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: none;
  animation: faqFade 0.3s ease;
}

.faq-item.open .faq-answer {
  display: block;
}

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

/* ========== CTA横幅 ========== */
.cta-banner {
  background: linear-gradient(135deg, var(--accent-soft), #F5DEB3);
  padding: 64px 40px;
  text-align: center;
  border-radius: 32px;
  border: 2px dashed rgba(217, 93, 57, 0.25);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '91';
  position: absolute;
  left: -20px;
  bottom: -40px;
  font-size: 9rem;
  font-weight: 900;
  color: rgba(38, 74, 51, 0.05);
  line-height: 1;
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--primary-dark);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: var(--text);
  opacity: 0.8;
  max-width: 480px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(38, 74, 51, 0.3);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  background: var(--accent);
  box-shadow: 0 8px 28px rgba(217, 93, 57, 0.3);
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 56px 0 28px;
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
}

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

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

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 260px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 1px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--accent);
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

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

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.7;
  font-size: 1rem;
}

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

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .feature-block {
    gap: 40px;
  }

  .hero h1 {
    font-size: 3.4rem;
  }

  .hero::after {
    font-size: 24vw;
    right: 0;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 60px 0;
  }

  .site-header {
    background: rgba(255, 253, 250, 0.97);
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(255, 253, 250, 0.98);
    backdrop-filter: blur(16px);
    padding: 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 32px rgba(40, 75, 51, 0.1);
    gap: 20px;
  }

  .main-nav.open {
    display: flex;
    align-items: flex-start;
  }

  .main-nav a {
    font-size: 1rem;
    width: 100%;
  }

  .main-nav a.nav-cta {
    padding: 12px 24px !important;
    text-align: center;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

  .hero-content {
    margin-bottom: 40px;
  }

  .hero-image {
    display: none;
  }

  .hero::after {
    font-size: 30vw;
    opacity: 0.05;
  }

  .feature-block {
    grid-template-columns: 1fr;
  }

  .feature-image {
    margin-bottom: 8px;
  }

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

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

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

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

@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;
  }

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

  .hero h1 {
    font-size: 2.2rem;
  }

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

  .btn {
    padding: 13px 24px;
    font-size: 0.9rem;
  }

  .cta-banner {
    border-radius: 20px;
    padding: 40px 20px;
  }

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

  .stat-number {
    font-size: 2rem;
  }

  .section {
    padding: 48px 0;
  }
}