/* ============================================================
   漫漫漫画 · 官网样式
   风格：浅色珊瑚红 / 居中 Hero + 浮动截图
   ============================================================ */

:root {
    --bg: #FFF5F5;
    --line: #FECACA;
    --text: #450A0A;
    --text-soft: #7F1D1D;
    --text-faint: #A8A29E;
    --accent: #E63946;
    --accent-bright: #F05454;
    --accent-deep: #C1121F;
    --gradient: linear-gradient(135deg, #E63946 0%, #F05454 100%);
    --radius: 14px;
    --shadow: 0 4px 20px rgba(230, 57, 70, 0.12);
    --shadow-lg: 0 24px 60px rgba(230, 57, 70, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    padding-bottom: 70px;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ============ 导航 ============ */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 38px; width: 38px; border-radius: 10px; object-fit: cover; }
.brand-name { font-size: 18px; font-weight: 700; }

/* ============ 按钮 ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 26px; border-radius: 10px;
    font-size: 14px; font-weight: 600; transition: all .25s;
}
.btn-small { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }
.btn-glow {
    background: var(--gradient); color: #fff;
    box-shadow: 0 4px 14px rgba(230,57,70,0.35);
}
.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(230,57,70,0.45); }

/* ============ 居中 Hero 浅色 ============ */
.hero-light {
    position: relative;
    padding: 70px 0 50px;
    text-align: center;
    background:
        radial-gradient(circle at 50% 0%, rgba(240,84,84,0.08), transparent 60%),
        var(--bg);
}
.hero-center { position: relative; }
.hero-logo {
    width: 80px; height: 80px; border-radius: 20px;
    margin: 0 auto 20px;
    box-shadow: var(--shadow-lg);
}
.hero-center h1 {
    font-size: 48px; font-weight: 800; margin-bottom: 12px;
    color: var(--accent-deep);
}
.hero-sub { font-size: 16px; color: var(--accent); margin-bottom: 20px; }
.hero-desc {
    font-size: 15px; color: var(--text-soft); line-height: 1.9;
    max-width: 480px; margin: 0 auto 36px;
}

/* 浮动截图 */
.hero-photos {
    display: flex; justify-content: center; gap: 16px;
    margin-top: 50px; flex-wrap: wrap;
}
.float-photo {
    width: 160px; border-radius: 14px;
    box-shadow: var(--shadow-lg);
    transition: transform .3s;
}
.float-photo:hover { transform: translateY(-8px); }

/* ============ Section ============ */
section { padding: 70px 0; }
.section-title { font-size: 30px; font-weight: 800; text-align: center; margin-bottom: 44px; }

/* ============ 功能（数字编号横排） ============ */
.features { background: #fff; }
.feature-row {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.f-item {
    padding: 28px 24px; border-radius: var(--radius);
    background: var(--bg); border: 1px solid transparent;
    transition: all .3s;
}
.f-item:hover { border-color: var(--accent-bright); transform: translateY(-4px); box-shadow: var(--shadow); }
.f-num {
    font-size: 28px; font-weight: 800; color: var(--accent);
    margin-bottom: 12px; opacity: .5;
}
.f-item h3 { font-size: 17px; margin-bottom: 8px; }
.f-item p { font-size: 14px; color: var(--text-soft); line-height: 1.8; }

/* ============ FAQ ============ */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-list details {
    border: 1px solid var(--line); border-radius: 12px;
    padding: 18px 24px; margin-bottom: 10px; background: #fff;
}
.faq-list details[open] { border-color: var(--accent-bright); }
.faq-list summary {
    font-size: 15px; font-weight: 600; cursor: pointer;
    list-style: none; position: relative; padding-right: 28px;
}
.faq-list summary::after {
    content: "+"; position: absolute; right: 0; top: 50%;
    transform: translateY(-50%); font-size: 20px; color: var(--accent);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { font-size: 14px; color: var(--text-soft); padding-top: 10px; }

/* ============ 页脚 ============ */
.footer {
    background: #450A0A; color: rgba(255,255,255,0.5); padding: 32px 0;
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.footer-logo { height: 36px; width: 36px; border-radius: 8px; object-fit: cover; }
.footer-copy { font-size: 13px; }

/* ============ 底部悬浮下载栏 ============ */
.sticky-bar {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 99;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
    border-top: 1px solid var(--line); padding: 10px 0;
}
.sticky-inner { display: flex; align-items: center; gap: 12px; }
.sticky-logo { height: 36px; width: 36px; border-radius: 8px; object-fit: cover; }
.sticky-text { flex: 1; display: flex; flex-direction: column; }
.sticky-text strong { font-size: 14px; }
.sticky-text span { font-size: 12px; color: var(--text-soft); }

/* ============ 滚动渐入 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
    .hero-center h1 { font-size: 34px; }
    .feature-row { grid-template-columns: repeat(2, 1fr); }
    .float-photo { width: 130px; }
    .footer-inner { flex-direction: column; text-align: center; }
}