@charset "UTF-8";

/* 基础重置与变量 */
:root {
  --c-primary: #10b981; /* Emerald */
  --c-primary-dark: #059669;
  --c-secondary: #14b8a6; /* Teal */
  --c-dark: #064e3b; /* Dark Forest */
  --c-text: #1f2937;
  --c-text-light: #6b7280;
  --c-bg: #f0fdf4; /* Mint bg */
  --c-white: #ffffff;
  --c-border: #e5e7eb;
  
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  
  --radius: 12px;
  --radius-lg: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--c-text); background-color: var(--c-bg); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
ul, li { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }

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

/* 布局工具 */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.sec-padding { padding: 100px 0; }
.sec-title { font-size: 36px; font-weight: 800; text-align: center; margin-bottom: 20px; color: var(--c-dark); }
.sec-subtitle { font-size: 18px; text-align: center; color: var(--c-text-light); margin-bottom: 60px; max-width: 800px; margin-left: auto; margin-right: auto; }

/* 按钮样式 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 28px; font-size: 16px; font-weight: 600; border-radius: 50px; transition: all 0.3s; }
.btn-primary { background: linear-gradient(135deg, var(--c-primary), var(--c-secondary)); color: var(--c-white); box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4); }
.btn-outline { background: transparent; border: 2px solid var(--c-primary); color: var(--c-primary); }
.btn-outline:hover { background: var(--c-primary); color: var(--c-white); }
.btn-dark { background: var(--c-dark); color: var(--c-white); }
.btn-dark:hover { background: #022c22; }

/* 导航栏 */
.nav { position: fixed; top: 0; left: 0; right: 0; background: rgba(255,255,255,0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--c-border); z-index: 1000; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.nav-logo { display: flex; align-items: center; font-size: 24px; font-weight: 800; color: var(--c-primary); gap: 10px; }
.nav-logo svg { width: 36px; height: 36px; }
.nav-menu { display: flex; gap: 30px; }
.nav-link { font-size: 15px; font-weight: 500; color: var(--c-text-light); transition: color 0.3s; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--c-primary); }
.nav-link::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 0%; height: 2px; background: var(--c-primary); transition: width 0.3s; }
.nav-link.active::after { width: 100%; }

/* Hero */
.hero { padding: 160px 0 80px; text-align: center; background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-white) 100%); }
.hero-title { font-size: 56px; font-weight: 900; color: var(--c-dark); margin-bottom: 24px; line-height: 1.2; letter-spacing: -1px; }
.hero-title span { background: linear-gradient(135deg, var(--c-primary), var(--c-secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 20px; color: var(--c-text-light); margin-bottom: 40px; max-width: 700px; margin-left: auto; margin-right: auto; }
.hero-btns { display: flex; gap: 20px; justify-content: center; margin-bottom: 60px; }
.hero-stats { display: flex; justify-content: center; gap: 60px; padding-top: 40px; border-top: 1px solid var(--c-border); }
.stat-item { text-align: center; }
.stat-num { font-size: 32px; font-weight: 800; color: var(--c-dark); }
.stat-label { font-size: 14px; color: var(--c-text-light); }

/* 特色功能 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 60px; }
.feat-card { background: var(--c-white); padding: 40px 30px; border-radius: var(--c-radius-lg); box-shadow: var(--c-shadow-sm); transition: all 0.3s; border: 1px solid var(--c-border); }
.feat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--c-primary); }
.feat-icon { width: 64px; height: 64px; border-radius: 16px; background: var(--c-bg); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--c-primary); }
.feat-icon svg { width: 32px; height: 32px; }
.feat-title { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--c-dark); }
.feat-desc { color: var(--c-text-light); font-size: 15px; }

/* 深入介绍 */
.deep-row { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
.deep-row:nth-child(even) { flex-direction: row-reverse; }
.deep-content { flex: 1; }
.deep-content h3 { font-size: 32px; font-weight: 800; margin-bottom: 20px; color: var(--c-dark); }
.deep-content p { font-size: 16px; color: var(--c-text-light); margin-bottom: 20px; }
.deep-visual { flex: 1; height: 400px; background: var(--c-bg); border-radius: var(--radius-lg); position: relative; overflow: hidden; border: 1px solid var(--c-border); display: flex; align-items: center; justify-content: center; color: var(--c-primary); }
.deep-visual svg { width: 120px; height: 120px; opacity: 0.8; }

/* 平台支持 */
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.plat-card { background: var(--c-white); padding: 40px 30px; border-radius: var(--radius-lg); text-align: center; box-shadow: var(--shadow); border: 1px solid var(--c-border); transition: all 0.3s; }
.plat-card:hover { border-color: var(--c-secondary); transform: translateY(-5px); }
.plat-icon { width: 80px; height: 80px; margin: 0 auto 20px; background: var(--c-bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--c-dark); }
.plat-icon svg { width: 40px; height: 40px; }
.plat-name { font-size: 24px; font-weight: 800; margin-bottom: 10px; color: var(--c-dark); }
.plat-req { font-size: 13px; color: var(--c-text-light); margin-bottom: 24px; }
.plat-btn { width: 100%; padding: 12px; }

/* 评价 */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.review-card { background: var(--c-white); padding: 30px; border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--c-border); }
.review-stars { color: #fbbf24; margin-bottom: 15px; display: flex; gap: 4px; }
.review-stars svg { width: 20px; height: 20px; }
.review-text { font-size: 15px; color: var(--c-text-light); margin-bottom: 20px; font-style: italic; }
.review-user { display: flex; align-items: center; gap: 12px; }
.user-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--c-primary); color: var(--c-white); display: flex; align-items: center; justify-content: center; font-weight: bold; }
.user-info h4 { font-size: 15px; font-weight: 700; color: var(--c-dark); }
.user-info p { font-size: 13px; color: var(--c-text-light); }

/* 安全保障 */
.security-wrap { background: var(--c-white); border-radius: var(--radius-lg); padding: 60px; box-shadow: var(--shadow); border: 1px solid var(--c-border); display: flex; gap: 60px; }
.sec-items { flex: 1; display: grid; grid-template-columns: 1fr; gap: 30px; }
.sec-item { display: flex; gap: 20px; }
.sec-item-icon { color: var(--c-primary); flex-shrink: 0; }
.sec-item-icon svg { width: 48px; height: 48px; }
.sec-item-content h4 { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--c-dark); }
.sec-item-content p { color: var(--c-text-light); font-size: 15px; }
.cmp-table-wrap { flex: 1; }
.cmp-table { width: 100%; border-collapse: collapse; }
.cmp-table th, .cmp-table td { padding: 16px; text-align: center; border-bottom: 1px solid var(--c-border); }
.cmp-table th { font-weight: 700; color: var(--c-dark); }
.cmp-table th:first-child, .cmp-table td:first-child { text-align: left; }
.cmp-hl { background: var(--c-bg); font-weight: bold; color: var(--c-primary); border-radius: 8px; }
.ico-yes { color: var(--c-primary); }
.ico-no { color: #ef4444; }
.ico-yes svg, .ico-no svg { width: 24px; height: 24px; }

/* 版本 */
.ver-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; align-items: center; }
.ver-card { background: var(--c-white); padding: 40px; border-radius: var(--radius-lg); border: 1px solid var(--c-border); box-shadow: var(--shadow-sm); position: relative; }
.ver-card.featured { transform: scale(1.05); border-color: var(--c-primary); box-shadow: var(--shadow-lg); z-index: 10; }
.ver-badge { position: absolute; top: -15px; left: 50%; transform: translateX(-50%); background: var(--c-primary); color: white; padding: 4px 16px; border-radius: 20px; font-size: 12px; font-weight: bold; }
.ver-name { font-size: 24px; font-weight: 800; margin-bottom: 10px; color: var(--c-dark); text-align: center; }
.ver-price { font-size: 40px; font-weight: 900; text-align: center; margin-bottom: 30px; color: var(--c-dark); }
.ver-price span { font-size: 16px; font-weight: normal; color: var(--c-text-light); }
.ver-list { margin-bottom: 30px; }
.ver-list li { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; font-size: 15px; color: var(--c-text-light); }
.ver-list li svg { width: 20px; height: 20px; color: var(--c-primary); flex-shrink: 0; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--c-white); border: 1px solid var(--c-border); border-radius: var(--radius); margin-bottom: 15px; overflow: hidden; transition: all 0.3s; }
.faq-q { padding: 20px 25px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 700; font-size: 18px; color: var(--c-dark); }
.faq-chevron { width: 20px; height: 20px; color: var(--c-text-light); transition: transform 0.3s; }
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-a { max-height: 0; opacity: 0; transition: all 0.3s ease-in-out; }
.faq-item.open .faq-a { max-height: 500px; opacity: 1; }
.faq-a-inner { padding: 0 25px 25px; color: var(--c-text-light); font-size: 15px; line-height: 1.8; border-top: 1px solid transparent; }
.faq-item.open .faq-a-inner { border-color: var(--c-border); padding-top: 20px; }

/* Footer */
.footer { background: var(--c-dark); color: var(--c-white); padding: 40px 0; text-align: center; }
.footer p { color: rgba(255,255,255,0.7); font-size: 14px; }

/* 响应式 */
@media (max-width: 992px) {
  .features-grid, .plat-grid, .reviews-grid, .ver-grid { grid-template-columns: repeat(2, 1fr); }
  .security-wrap { flex-direction: column; }
  .hero-title { font-size: 40px; }
  .deep-row, .deep-row:nth-child(even) { flex-direction: column; text-align: center; }
}
@media (max-width: 768px) {
  .features-grid, .plat-grid, .reviews-grid, .ver-grid { grid-template-columns: 1fr; }
  .ver-card.featured { transform: none; }
  .nav-menu { display: none; }
  .hero-stats { flex-wrap: wrap; gap: 30px; }
}