:root {
    --primary: #1a73e8; /* 搜索蓝 */
    --primary-hover: #1b66c9;
    --bg-white: #ffffff;
    --bg-gray: #f8f9fa;
    --text-main: #202124;
    --text-muted: #5f6368;
    --border-color: #dfe1e5;
    --shadow: 0 1px 6px rgba(32,33,36,0.28);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-white);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* 顶部极简导航 */
header {
    position: absolute; top: 0; right: 0; width: 100%; padding: 20px 30px;
    display: flex; justify-content: flex-end; z-index: 100;
}
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { font-size: 13px; color: var(--text-main); }
.nav-links a:hover { text-decoration: underline; }
.nav-links .ai-login { background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 4px; font-weight: bold; }
.nav-links .ai-login:hover { background: var(--primary-hover); text-decoration: none; }

/* 搜索页 Hero 区 */
.hero {
    min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center;
    text-align: center; padding-top: 50px;
}
.hero-logo { font-size: 64px; font-weight: 800; color: #4285f4; margin-bottom: 30px; letter-spacing: -2px; }
.hero-logo span:nth-child(1) { color: #ea4335; }
.hero-logo span:nth-child(2) { color: #fbbc05; }
.hero-logo span:nth-child(3) { color: #34a853; }
.hero-logo span:nth-child(4) { color: #4285f4; }

.search-box {
    width: 100%; max-width: 600px; height: 50px;
    border: 1px solid var(--border-color); border-radius: 25px;
    display: flex; align-items: center; padding: 0 20px; margin-bottom: 30px;
    transition: box-shadow 0.2s;
}
.search-box:hover, .search-box:focus-within { box-shadow: var(--shadow); border-color: rgba(223,225,229,0); }
.search-icon { width: 20px; height: 20px; fill: #9aa0a6; margin-right: 15px; }
.search-box input { border: none; outline: none; flex: 1; font-size: 16px; color: var(--text-main); }
.search-box .ai-btn { background: linear-gradient(90deg, #4285f4, #ea4335); -webkit-background-clip: text; -webkit-text-fill-color: transparent; font-weight: bold; cursor: pointer; }

.hero-btns { display: flex; gap: 15px; margin-bottom: 40px; }
.btn {
    padding: 10px 24px; border-radius: 4px; font-size: 14px; font-weight: 500; cursor: pointer;
    background: var(--bg-gray); border: 1px solid var(--bg-gray); color: #3c4043; transition: 0.2s;
}
.btn:hover { border-color: var(--border-color); box-shadow: 0 1px 1px rgba(0,0,0,0.1); color: #202124; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }

.hero-footer { font-size: 13px; color: var(--text-muted); }
.hero-footer a { color: var(--primary); }

.scroll-indicator { position: absolute; bottom: 30px; color: var(--text-muted); font-size: 12px; animation: bounce 2s infinite; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-10px); } 60% { transform: translateY(-5px); } }

/* 通用模块区 */
section { padding: 80px 0; border-top: 1px solid var(--border-color); }
.section-title { font-size: 28px; font-weight: normal; color: var(--text-main); margin-bottom: 40px; text-align: center; }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.feature-item { text-align: center; }
.feature-item img { width: 48px; height: 48px; margin: 0 auto 15px; border-radius: 50%; background: var(--bg-gray); padding: 10px; }
.feature-item h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--text-main); }
.feature-item p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 (类似搜索结果条目) */
.detail-result { margin-bottom: 40px; display: flex; gap: 30px; align-items: flex-start; }
.detail-result .content { flex: 1; }
.detail-result .url { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; display: flex; align-items: center; gap: 5px; }
.detail-result .url img { width: 16px; height: 16px; }
.detail-result h3 { font-size: 20px; font-weight: normal; color: #1a0dab; margin-bottom: 8px; }
.detail-result h3:hover { text-decoration: underline; cursor: pointer; }
.detail-result p { font-size: 14px; color: #4d5156; line-height: 1.58; }
.detail-result .d-img { width: 200px; border-radius: 8px; border: 1px solid var(--border-color); }

/* 对比表格 */
.compare-box { border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 15px 20px; border-bottom: 1px solid var(--border-color); font-size: 14px; }
.compare-table th { background: var(--bg-gray); color: var(--text-muted); font-weight: 500; }
.compare-table .hl { color: var(--primary); font-weight: bold; background: #e8f0fe; }

/* 版本下载 */
.versions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.v-card { border: 1px solid var(--border-color); border-radius: 8px; padding: 30px 20px; text-align: center; }
.v-card h3 { font-size: 20px; font-weight: normal; margin-bottom: 15px; }
.v-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; height: 42px; }

/* 数据展示 */
.data-sec { background: var(--bg-gray); border-top: none; }
.data-wrap { display: flex; justify-content: space-around; text-align: center; }
.data-item h4 { font-size: 36px; font-weight: normal; color: var(--primary); margin-bottom: 5px; }
.data-item p { font-size: 14px; color: var(--text-muted); }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border-color); padding: 20px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item h4 { font-size: 16px; font-weight: normal; color: var(--text-main); margin-bottom: 10px; }
.faq-item p { font-size: 14px; color: var(--text-muted); }

footer { background: #f2f2f2; padding: 20px 0; border-top: 1px solid var(--border-color); font-size: 13px; color: var(--text-muted); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }