/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; background: #f5f7fa; color: #333; line-height: 1.6; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 主色 ===== */
:root { --primary: #91bb1c; --primary-dark: #7aa318; --primary-light: #b5d96a; --primary-bg: #f0f7e0; }

.highlight { color: var(--primary); }

/* ===== 头部 ===== */
.header { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,0.08); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; justify-content: space-between; align-items: center; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: #222; }
.logo img { height: 36px; width: auto; }
.logo .highlight { color: var(--primary); }
.nav { display: flex; gap: 24px; }
.nav a { font-size: 15px; color: #555; padding: 6px 0; border-bottom: 2px solid transparent; transition: 0.3s; }
.nav a:hover, .nav a.active { color: var(--primary); border-bottom-color: var(--primary); }
.menu-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: #333; }

/* ===== Hero ===== */
.hero { background: linear-gradient(135deg, var(--primary-bg) 0%, #fff 100%); padding: 50px 0 60px; }
.hero-inner { display: flex; align-items: center; gap: 50px; flex-wrap: wrap; }
.hero-text { flex: 1; min-width: 280px; }
.hero-text h1 { font-size: 38px; font-weight: 800; color: #222; }
.hero-text h1 small { font-size: 18px; font-weight: 400; color: #666; margin-left: 10px; }
.hero-text p { font-size: 18px; color: #555; margin: 12px 0 8px; }
.hero-desc { font-size: 15px; color: #888; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin: 24px 0 16px; }
.hero-image { flex: 0 0 280px; }
.hero-image img { border-radius: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.12); }
.hero-stats { display: flex; gap: 24px; font-size: 14px; color: #666; flex-wrap: wrap; }
.hero-stats strong { color: var(--primary); font-size: 18px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px; border-radius: 50px; font-size: 17px; font-weight: 600; border: none; cursor: pointer; transition: all 0.3s; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(145, 187, 28, 0.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(145, 187, 28, 0.45); }

/* ===== 悬浮下载按钮 ===== */
.float-download { position: fixed; bottom: 0; left: 0; right: 0; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); padding: 12px 20px; display: flex; justify-content: center; gap: 16px; box-shadow: 0 -4px 20px rgba(0,0,0,0.10); z-index: 999; border-top: 2px solid var(--primary); }
.btn-float { flex: 1; max-width: 200px; padding: 12px 20px; border-radius: 50px; font-size: 15px; font-weight: 600; text-align: center; color: #fff; background: var(--primary); box-shadow: 0 4px 16px rgba(145,187,28,0.3); transition: 0.3s; }
.btn-float:hover { background: var(--primary-dark); transform: scale(1.03); }

/* ===== 特色 ===== */
.section-title { text-align: center; font-size: 30px; font-weight: 700; margin-bottom: 40px; color: #222; }
.features { padding: 60px 0; background: #fff; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 30px; }
.feature-item { text-align: center; padding: 30px 20px; border-radius: 16px; background: var(--primary-bg); transition: 0.3s; }
.feature-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.feature-icon { font-size: 42px; margin-bottom: 12px; }
.feature-item h3 { font-size: 18px; color: #222; }
.feature-item p { font-size: 14px; color: #666; margin-top: 6px; }

/* ===== 截图 ===== */
.screenshots { padding: 60px 0; background: var(--primary-bg); }
.screenshot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 20px; }
.screenshot-grid img { border-radius: 12px; box-shadow: 0 4px 16px rgba(0,0,0,0.08); transition: 0.3s; }
.screenshot-grid img:hover { transform: scale(1.02); }

/* ===== 底部 ===== */
.footer { background: #1a1a2e; color: #aaa; padding: 30px 0; text-align: center; }
.footer-disclaimer { background: rgba(255,200,0,0.12); color: #ffd700; padding: 12px 20px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.footer-stats { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; font-size: 14px; margin-bottom: 12px; }
.footer-stats strong { color: var(--primary); font-size: 18px; }
.footer-copy { font-size: 13px; color: #666; }

/* ===== 下载页 ===== */
.page-hero { background: var(--primary-bg); padding: 40px 0; text-align: center; }
.page-hero h1 { font-size: 32px; }
.download-section { padding: 50px 0; }
.download-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 30px; max-width: 700px; margin: 0 auto; }
.download-card { background: #fff; padding: 36px 28px; border-radius: 16px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.download-card .card-icon { font-size: 52px; }
.download-card h2 { margin: 12px 0 8px; }
.download-card p { color: #888; font-size: 14px; }
.download-card .btn { margin-top: 16px; }
.download-tips { max-width: 600px; margin: 40px auto 0; background: #fff; padding: 24px 30px; border-radius: 12px; }
.download-tips ul { padding-left: 20px; color: #555; }

/* ===== 教程 & FAQ ===== */
.guide-content, .faq-content { padding: 50px 0; }
.guide-step { display: flex; gap: 20px; align-items: flex-start; max-width: 640px; margin: 0 auto 30px; background: #fff; padding: 20px 24px; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.step-num { flex-shrink: 0; width: 40px; height: 40px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 18px; }
.faq-item { max-width: 720px; margin: 0 auto 16px; background: #fff; padding: 16px 24px; border-radius: 10px; border-left: 4px solid var(--primary); }
.faq-item h3 { font-size: 16px; color: #222; }
.faq-item p { color: #666; font-size: 14px; margin-top: 4px; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav { display: none; flex-direction: column; background: #fff; position: absolute; top: 64px; left: 0; right: 0; padding: 16px 20px; box-shadow: 0 8px 24px rgba(0,0,0,0.10); gap: 12px; }
    .nav.open { display: flex; }
    .menu-toggle { display: block; }
    .hero-inner { flex-direction: column; text-align: center; }
    .hero-text h1 { font-size: 28px; }
    .hero-btns { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-image { flex: 0 0 auto; width: 100%; max-width: 280px; margin: 0 auto; }
    .float-download { padding: 10px 12px; gap: 10px; }
    .btn-float { font-size: 13px; padding: 10px 14px; max-width: 160px; }
    .footer-stats { gap: 16px; font-size: 13px; }
    .section-title { font-size: 24px; }
}
@media (max-width: 420px) {
    .hero-text h1 { font-size: 22px; }
    .btn { padding: 12px 24px; font-size: 15px; }
    .btn-float { font-size: 12px; padding: 8px 10px; max-width: 130px; }
}