:root {
    --bg-main: #FFF8F8; /* 偏暖的促销底色 */
    --brand-red: #FF3B30; /* 转化红 */
    --brand-red-hover: #E6352B;
    --brand-orange: #FF9500; /* 促销黄/橙 */
    --brand-green: #34C759; /* 官方绿 */
    --text-dark: #1C1C1E;
    --text-body: #3A3A3C;
    --text-muted: #8E8E93;
    --border-light: #E5E5EA;
    --shadow-card: 0 8px 30px rgba(255, 59, 48, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; background-color: var(--bg-main); color: var(--text-body); line-height: 1.5; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* 顶部促销横幅 */
.promo-banner { background: linear-gradient(90deg, var(--brand-red), var(--brand-orange)); color: #FFF; text-align: center; padding: 10px; font-size: 14px; font-weight: 600; letter-spacing: 1px; }

/* 导航 */
.header { background: #FFFFFF; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; padding: 0 20px; }
.logo { font-size: 22px; font-weight: 800; color: var(--brand-red); display: flex; align-items: center; gap: 8px; }
.logo img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { font-size: 16px; font-weight: 600; color: var(--text-dark); }
.nav-links a:hover, .nav-links a.active { color: var(--brand-red); }
.nav-btn { background: var(--brand-red); color: #FFF !important; padding: 6px 18px; border-radius: 20px; font-size: 14px; }

.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; }

/* 电商强转化按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 16px 36px; border-radius: 8px; font-size: 20px; font-weight: 800; cursor: pointer; transition: 0.3s; position: relative; overflow: hidden; text-shadow: 0 1px 2px rgba(0,0,0,0.2); }
.btn-primary { background: linear-gradient(180deg, #FF6B6B 0%, var(--brand-red) 100%); color: #FFF; box-shadow: 0 6px 15px rgba(255, 59, 48, 0.4); border: 1px solid #E6352B; }
.btn-primary:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 10px 20px rgba(255, 59, 48, 0.6); }
.btn-primary::after { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: rgba(255,255,255,0.2); transform: rotate(45deg); animation: shine 3s infinite; }
@keyframes shine { 0% { left: -100%; } 20% { left: 100%; } 100% { left: 100%; } }
.btn-outline { background: #FFF; color: var(--brand-red); border: 2px solid var(--brand-red); box-shadow: 0 4px 10px rgba(255, 59, 48, 0.1); text-shadow: none; }
.btn-outline:hover { background: #FFF0F0; transform: translateY(-3px); }

/* 首屏 Hero 区 (商品主图区) */
.hero { display: flex; align-items: stretch; gap: 40px; padding: 40px 20px; max-width: 1200px; margin: 0 auto; background: #FFF; border-radius: 16px; box-shadow: var(--shadow-card); margin-top: 40px; border: 1px solid var(--border-light); }
.hero-visual { flex: 1.2; position: relative; }
.hero-visual img { border-radius: 8px; }
.sale-tag { position: absolute; top: 10px; left: -10px; background: var(--brand-red); color: #FFF; font-weight: 900; font-size: 18px; padding: 8px 16px; border-radius: 4px; box-shadow: 2px 2px 8px rgba(0,0,0,0.2); transform: rotate(-5deg); z-index: 2; }
.hero-content { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.hero-content h1 { font-size: 42px; font-weight: 900; color: var(--text-dark); margin-bottom: 10px; line-height: 1.2; }
.price-row { display: flex; align-items: baseline; gap: 10px; margin-bottom: 15px; color: var(--brand-red); }
.price-row .currency { font-size: 24px; font-weight: bold; }
.price-row .price { font-size: 48px; font-weight: 900; }
.price-row .original { font-size: 18px; color: var(--text-muted); text-decoration: line-through; }
.hero-content .subtitle { font-size: 18px; color: var(--brand-orange); font-weight: 700; margin-bottom: 20px; background: #FFF5E5; padding: 8px 12px; border-radius: 4px; display: inline-block; }
.hero-content .desc { font-size: 14px; color: var(--text-body); margin-bottom: 30px; line-height: 1.6; }
.hero-btns { display: flex; flex-direction: column; gap: 15px; }

/* 模块标题 (卖点标题) */
.sec-title { text-align: center; font-size: 32px; font-weight: 900; color: var(--text-dark); margin-bottom: 40px; position: relative; padding-bottom: 15px; }
.sec-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 4px; background: var(--brand-red); border-radius: 2px; }

/* 核心卖点 (利益点) */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 15px; }
.f-box { background: #FFF; padding: 25px 15px; text-align: center; border-radius: 8px; border: 1px solid var(--border-light); transition: 0.3s; }
.f-box:hover { border-color: var(--brand-red); box-shadow: 0 4px 12px rgba(255,59,48,0.1); transform: translateY(-3px); }
.f-box img { width: 48px; height: 48px; margin: 0 auto 15px; }
.f-box h3 { font-size: 15px; font-weight: 800; color: var(--text-dark); margin-bottom: 5px; }
.f-box p { font-size: 12px; color: var(--brand-red); font-weight: 600; }

/* 功能详情 (商品详情图) */
.detail-box { background: #FFF; border-radius: 12px; padding: 40px; margin-bottom: 30px; display: flex; align-items: center; gap: 40px; box-shadow: 0 2px 15px rgba(0,0,0,0.03); border: 1px solid var(--border-light); }
.detail-box:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 26px; font-weight: 900; color: var(--text-dark); margin-bottom: 15px; }
.d-text p { font-size: 15px; color: var(--text-body); margin-bottom: 20px; line-height: 1.8; }
.d-data { display: inline-flex; align-items: center; background: #FFF0F0; color: var(--brand-red); padding: 8px 16px; border-radius: 20px; font-weight: 800; font-size: 16px; }
.d-visual { flex: 1.2; }
.d-visual img { border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); }

/* 浏览器对比 (竞品参数对比) */
.compare-box { background: #FFF; border-radius: 12px; padding: 30px; box-shadow: 0 2px 15px rgba(0,0,0,0.03); border: 1px solid var(--border-light); overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; text-align: center; }
.compare-table th, .compare-table td { padding: 15px; border: 1px solid var(--border-light); }
.compare-table th { background: #F9F9F9; font-weight: 800; color: var(--text-dark); }
.compare-table th.hl-head { background: var(--brand-red); color: #FFF; font-size: 18px; }
.compare-table td.hl { background: #FFF0F0; color: var(--brand-red); font-weight: 800; font-size: 16px; }
.compare-table td { font-size: 14px; color: var(--text-body); }

/* 下载版本区 (套餐选择) */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dl-card { background: #FFF; border: 2px solid var(--border-light); padding: 40px 20px; text-align: center; border-radius: 12px; transition: 0.3s; position: relative; overflow: hidden; }
.dl-card:hover { border-color: var(--brand-red); box-shadow: var(--shadow-card); transform: translateY(-5px); }
.dl-card.rec { border: 2px solid var(--brand-red); }
.dl-card.rec::before { content: '店长推荐'; position: absolute; top: 15px; right: -30px; background: var(--brand-red); color: #FFF; font-weight: 800; font-size: 12px; padding: 5px 30px; transform: rotate(45deg); box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
.dl-card h3 { font-size: 24px; font-weight: 900; color: var(--text-dark); margin-bottom: 10px; }
.dl-card .price { font-size: 32px; color: var(--brand-red); font-weight: 900; margin-bottom: 15px; }
.dl-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 30px; height: 40px; }
.dl-card .btn { width: 100%; font-size: 18px; padding: 12px; }

/* 数据背书 (销量评价展示) */
.data-sec { background: var(--brand-red); color: #FFF; padding: 40px 20px; margin: 60px 0; text-align: center; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; }
.data-item h4 { font-size: 48px; font-weight: 900; margin-bottom: 5px; }
.data-item p { font-size: 16px; font-weight: 700; opacity: 0.9; }

/* FAQ (购买须知) */
.faq-grid { max-width: 800px; margin: 0 auto; background: #FFF; border-radius: 12px; padding: 30px; box-shadow: 0 2px 15px rgba(0,0,0,0.03); border: 1px solid var(--border-light); }
.faq-box { padding: 20px 0; border-bottom: 1px dashed var(--border-light); }
.faq-box:last-child { border-bottom: none; }
.faq-box h4 { font-size: 16px; font-weight: 800; color: var(--text-dark); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.faq-box h4::before { content: '问'; display: inline-block; background: var(--brand-orange); color: #FFF; width: 20px; height: 20px; line-height: 20px; text-align: center; border-radius: 4px; font-size: 12px; }
.faq-box p { font-size: 14px; color: var(--text-body); padding-left: 28px; }

/* Footer */
.footer { background: #1C1C1E; color: #8E8E93; text-align: center; padding: 40px 20px; font-size: 14px; margin-top: 60px; }