/* ===== 全局重置 & 基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: #0a0a0a;
    color: #f0f0f0;
    overflow-x: hidden;
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #1a1a1a; }
::-webkit-scrollbar-thumb { background: #555; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #888; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航 ===== */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 999;
    padding: 16px 0; background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: all 0.3s;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: #fff; }
.nav-logo i { font-size: 28px; color: #ccc; }
.nav-logo span { background: linear-gradient(135deg, #f0f0f0, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; color: #aaa; }
.nav-links a { transition: color 0.3s; position: relative; }
.nav-links a:hover { color: #fff; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: #fff; transition: width 0.3s; }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: #fff; }
.nav-links a.active::after { width: 100%; }
.nav-download-btn { background: #fff; color: #0a0a0a !important; padding: 8px 20px; border-radius: 30px; font-weight: 600; transition: all 0.3s; }
.nav-download-btn:hover { background: #ccc; transform: scale(1.05); }
.nav-download-btn::after { display: none !important; }
.mobile-toggle { display: none; font-size: 24px; color: #fff; cursor: pointer; }

/* ===== 轮播 ===== */
.hero-slider { position: relative; width: 100%; height: 100vh; min-height: 600px; overflow: hidden; margin-top: 0; }
.slider-track { display: flex; width: 100%; height: 100%; transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
.slide { flex: 0 0 100%; height: 100%; position: relative; overflow: hidden; }
.slide img { width: 100%; height: 100%; object-fit: cover; display: block; filter: brightness(0.5) saturate(0.9); transition: transform 0.8s ease; }
.slide:hover img { transform: scale(1.03); }
.slide-overlay {
    position: absolute; inset: 0; display: flex; flex-direction: column;
    align-items: center; justify-content: center; text-align: center; padding: 40px 20px;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);
}
.slide-overlay .badge { display: inline-block; padding: 6px 20px; border: 1px solid rgba(255,255,255,0.3); border-radius: 30px; font-size: 12px; letter-spacing: 3px; text-transform: uppercase; color: #ccc; margin-bottom: 20px; backdrop-filter: blur(4px); }
.slide-overlay h1 { font-size: clamp(42px, 10vw, 96px); font-weight: 800; letter-spacing: 4px; line-height: 1.1; margin-bottom: 16px; text-shadow: 0 4px 40px rgba(0,0,0,0.6); }
.slide-overlay h1 .highlight { background: linear-gradient(135deg, #fff 30%, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.slide-overlay p { font-size: clamp(16px, 2.5vw, 28px); color: #ccc; font-weight: 300; letter-spacing: 2px; max-width: 700px; margin-bottom: 32px; text-shadow: 0 2px 20px rgba(0,0,0,0.5); }
.slide-overlay .btn-download-hero { display: inline-flex; align-items: center; gap: 12px; padding: 16px 48px; background: #fff; color: #0a0a0a; font-size: 18px; font-weight: 700; border-radius: 60px; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); box-shadow: 0 8px 40px rgba(255,255,255,0.15); border: none; cursor: pointer; }
.slide-overlay .btn-download-hero:hover { transform: translateY(-4px) scale(1.03); box-shadow: 0 16px 60px rgba(255,255,255,0.25); background: #f0f0f0; }
.slide-indicators { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 10; }
.slide-indicators .dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.25); border: 1px solid rgba(255,255,255,0.1); cursor: pointer; transition: all 0.4s; }
.slide-indicators .dot.active { background: #fff; transform: scale(1.25); box-shadow: 0 0 20px rgba(255,255,255,0.3); }
.slider-arrows { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; width: 100%; display: flex; justify-content: space-between; padding: 0 20px; pointer-events: none; }
.slider-arrows button { pointer-events: auto; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); color: #fff; width: 52px; height: 52px; border-radius: 50%; font-size: 20px; cursor: pointer; transition: all 0.3s; backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; }
.slider-arrows button:hover { background: rgba(255,255,255,0.2); transform: scale(1.1); }

/* ===== 搜索 ===== */
.search-section { padding: 60px 0 40px; background: #0d0d0d; border-top: 1px solid rgba(255,255,255,0.04); border-bottom: 1px solid rgba(255,255,255,0.04); }
.search-section .container { display: flex; flex-direction: column; align-items: center; }
.search-section h2 { font-size: 20px; font-weight: 300; color: #888; margin-bottom: 20px; letter-spacing: 6px; text-transform: uppercase; }
.search-box-wrap { position: relative; width: 100%; max-width: 640px; }
.search-box { display: flex; align-items: center; background: #1a1a1a; border-radius: 60px; border: 1px solid rgba(255,255,255,0.08); padding: 4px 4px 4px 24px; transition: all 0.4s; }
.search-box:focus-within { border-color: rgba(255,255,255,0.3); box-shadow: 0 0 40px rgba(255,255,255,0.04); }
.search-box i { color: #666; font-size: 18px; }
.search-box input { flex: 1; background: transparent; border: none; outline: none; color: #f0f0f0; padding: 14px 16px; font-size: 15px; font-weight: 300; }
.search-box input::placeholder { color: #555; }
.search-box .search-btn { background: #fff; color: #0a0a0a; border: none; padding: 10px 28px; border-radius: 40px; font-weight: 600; font-size: 14px; cursor: pointer; transition: all 0.3s; }
.search-box .search-btn:hover { background: #ddd; }
.search-dropdown { position: absolute; top: calc(100% + 8px); left: 0; width: 100%; background: #141414; border-radius: 20px; border: 1px solid rgba(255,255,255,0.06); box-shadow: 0 20px 60px rgba(0,0,0,0.8); padding: 12px 0; max-height: 320px; overflow-y: auto; display: none; z-index: 50; }
.search-dropdown.open { display: block; }
.search-dropdown .hot-tag { display: block; padding: 10px 24px; font-size: 14px; color: #bbb; transition: all 0.2s; cursor: pointer; border-left: 2px solid transparent; }
.search-dropdown .hot-tag:hover { background: rgba(255,255,255,0.04); color: #fff; border-left-color: #fff; }
.search-dropdown .hot-tag i { color: #555; margin-right: 12px; font-size: 12px; }
.search-dropdown .hot-tag .trending { float: right; color: #555; font-size: 12px; }
.search-dropdown .dropdown-header { padding: 6px 24px 12px; font-size: 12px; color: #555; letter-spacing: 2px; border-bottom: 1px solid rgba(255,255,255,0.04); }

/* ===== 下载 ===== */
.download-section { padding: 80px 0 60px; background: #0a0a0a; }
.download-section .container { text-align: center; }
.download-section .section-label { font-size: 12px; color: #555; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 8px; }
.download-section h2 { font-size: clamp(30px, 5vw, 52px); font-weight: 700; margin-bottom: 12px; }
.download-section h2 span { background: linear-gradient(135deg, #fff, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.download-section .sub { color: #777; font-size: 16px; font-weight: 300; margin-bottom: 40px; }
.download-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; }
.download-btn-card { background: #141414; border: 1px solid rgba(255,255,255,0.06); border-radius: 24px; padding: 32px 48px 28px; min-width: 220px; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); cursor: pointer; text-align: center; }
.download-btn-card:hover { transform: translateY(-8px); border-color: rgba(255,255,255,0.15); box-shadow: 0 20px 60px rgba(0,0,0,0.5); background: #1a1a1a; }
.download-btn-card .icon-wrap { font-size: 40px; margin-bottom: 12px; color: #ccc; }
.download-btn-card .platform { font-size: 20px; font-weight: 700; color: #fff; }
.download-btn-card .version { font-size: 13px; color: #666; margin-top: 4px; }
.download-btn-card .btn-action { display: inline-block; margin-top: 16px; padding: 10px 32px; border-radius: 40px; background: #fff; color: #0a0a0a; font-weight: 600; font-size: 14px; transition: all 0.3s; border: none; cursor: pointer; }
.download-btn-card .btn-action:hover { background: #ddd; transform: scale(1.05); }
.download-btn-card.android .icon-wrap { color: #a4c639; }
.download-btn-card.ios .icon-wrap { color: #aaa; }

/* ===== 产品展示 ===== */
.vs-zhanshi {
    padding: 80px 0 60px;
    background: #0a0a0a;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.vs-zhanshi-nei {
    text-align: center;
}
.vs-zhanshi-toubu {
    margin-bottom: 48px;
}
.vs-qukuai-biaoqian {
    font-size: 12px;
    color: #555;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.vs-zhanshi-biaoti {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #f0f0f0, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}
.vs-qukuai-miaoshu {
    color: #777;
    font-size: 16px;
    font-weight: 300;
}
.vs-zhanshi-wangge {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
.vs-zhanshi-xiang {
    border-radius: 16px;
    overflow: hidden;
    background: #141414;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    aspect-ratio: 284 / 505;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
}
.vs-zhanshi-xiang:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.vs-zhanshi-xiang img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}
.vs-zhanshi-xiang:hover img {
    transform: scale(1.05);
}
@media (max-width: 992px) {
    .vs-zhanshi-wangge {
        grid-template-columns: repeat(2, 1fr);
        max-width: 500px;
        gap: 16px;
    }
}
@media (max-width: 480px) {
    .vs-zhanshi-wangge {
        grid-template-columns: 1fr 1fr;
        max-width: 320px;
        gap: 12px;
    }
}

/* ===== 特色 ===== */
.features-section { padding: 80px 0; background: #0a0a0a; }
.features-section .container { text-align: center; }
.features-section .label { font-size: 12px; color: #555; letter-spacing: 4px; text-transform: uppercase; }
.features-section h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 700; margin: 8px 0 40px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 30px; }
.feature-card { background: #111; border: 1px solid rgba(255,255,255,0.04); border-radius: 20px; padding: 36px 24px 30px; transition: all 0.4s; }
.feature-card:hover { border-color: rgba(255,255,255,0.1); transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.feature-card .f-icon { font-size: 36px; color: #ccc; margin-bottom: 16px; }
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; color: #f0f0f0; }
.feature-card p { font-size: 14px; color: #777; line-height: 1.7; font-weight: 300; }

/* ===== 关键词云 ===== */
.keywords-section { padding: 50px 0; background: #0d0d0d; border-top: 1px solid rgba(255,255,255,0.04); border-bottom: 1px solid rgba(255,255,255,0.04); }
.keywords-section .container { text-align: center; }
.keywords-section .label { font-size: 12px; color: #555; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 20px; }
.keyword-cloud { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 18px; max-width: 900px; margin: 0 auto; }
.keyword-cloud .kw { font-size: 14px; color: #888; padding: 6px 14px; border: 1px solid rgba(255,255,255,0.06); border-radius: 30px; transition: all 0.3s; cursor: default; background: rgba(255,255,255,0.02); }
.keyword-cloud .kw:hover { color: #fff; border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.04); transform: scale(1.05); }
.keyword-cloud .kw.lg { font-size: 18px; color: #bbb; }
.keyword-cloud .kw.sm { font-size: 12px; color: #666; }

/* ===== 统计 ===== */
.stats-section { padding: 60px 0 50px; background: #080808; border-top: 1px solid rgba(255,255,255,0.04); }
.stats-section .container { text-align: center; }
.stats-section .label { font-size: 12px; color: #555; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 30px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 24px; max-width: 800px; margin: 0 auto; }
.stat-item { background: #111; border: 1px solid rgba(255,255,255,0.04); border-radius: 16px; padding: 24px 16px; transition: all 0.3s; }
.stat-item:hover { border-color: rgba(255,255,255,0.08); background: #141414; }
.stat-item .number { font-size: 36px; font-weight: 700; color: #fff; letter-spacing: 1px; }
.stat-item .number.glow { text-shadow: 0 0 30px rgba(255,255,255,0.06); }
.stat-item .stat-label { font-size: 13px; color: #666; margin-top: 4px; font-weight: 300; }
.stat-item .stat-sub { font-size: 11px; color: #444; margin-top: 2px; }

/* ===== 副页通用 ===== */
.page-header { padding: 120px 0 40px; background: #0a0a0a; border-bottom: 1px solid rgba(255,255,255,0.04); text-align: center; }
.page-header h1 { font-size: clamp(36px, 6vw, 56px); font-weight: 700; }
.page-header p { color: #888; margin-top: 10px; font-size: 18px; }
.faq-list { max-width: 860px; margin: 40px auto; }
.faq-item { background: #111; border: 1px solid rgba(255,255,255,0.06); border-radius: 16px; margin-bottom: 16px; overflow: hidden; transition: all 0.3s; }
.faq-item:hover { border-color: rgba(255,255,255,0.12); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 20px 28px; cursor: pointer; font-weight: 600; font-size: 17px; color: #f0f0f0; user-select: none; }
.faq-question i { color: #555; transition: transform 0.4s; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; padding: 0 28px; overflow: hidden; transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s; color: #aaa; line-height: 1.8; font-size: 15px; }
.faq-item.active .faq-answer { max-height: 400px; padding: 0 28px 28px; }
.tutorial-grid { display: flex; flex-direction: column; gap: 40px; max-width: 900px; margin: 40px auto; }
.tutorial-step { display: flex; gap: 30px; align-items: center; background: #111; border-radius: 24px; padding: 30px; border: 1px solid rgba(255,255,255,0.04); transition: all 0.4s; }
.tutorial-step:hover { transform: translateX(8px); border-color: rgba(255,255,255,0.1); }
.tutorial-step .step-num { font-size: 48px; font-weight: 800; color: #333; min-width: 70px; text-align: center; font-family: 'Arial Black', sans-serif; }
.tutorial-step .step-content h3 { font-size: 22px; margin-bottom: 6px; color: #fff; }
.tutorial-step .step-content p { color: #888; font-size: 15px; line-height: 1.7; }
.step-img-placeholder { width: 120px; height: 120px; background: #1a1a1a; border-radius: 16px; display: flex; align-items: center; justify-content: center; border: 1px dashed #333; color: #555; font-size: 14px; flex-shrink: 0; }
.changelog-timeline { max-width: 800px; margin: 40px auto; }
.version-item { padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,0.04); }
.version-item:last-child { border-bottom: none; }
.version-item .version-tag { display: inline-block; background: #222; padding: 4px 16px; border-radius: 30px; font-size: 14px; font-weight: 700; color: #fff; margin-right: 16px; }
.version-item .version-date { color: #555; font-size: 14px; }
.version-item ul { margin-top: 10px; padding-left: 24px; color: #aaa; line-height: 2; }
.version-item ul li::marker { color: #555; }
.about-content { max-width: 800px; margin: 0 auto; text-align: center; }
.about-content p { color: #aaa; line-height: 2; font-size: 16px; margin-bottom: 16px; }
.about-stats-mini { display: flex; justify-content: center; gap: 40px; margin: 40px 0; }
.about-stats-mini div { text-align: center; }
.about-stats-mini .num { font-size: 32px; font-weight: 700; color: #fff; }
.about-stats-mini .label { color: #666; font-size: 14px; }
.text-gradient { background: linear-gradient(135deg, #f0f0f0, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

/* ===== 页脚 ===== */
.footer { padding: 30px 0; background: #050505; border-top: 1px solid rgba(255,255,255,0.03); text-align: center; }
.footer .container { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.footer p { font-size: 13px; color: #444; font-weight: 300; }
.footer .footer-keywords { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 16px; font-size: 12px; color: #333; }
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; width: 100%; background: rgba(10,10,10,0.98); padding: 20px 24px; gap: 16px; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .nav-links.open { display: flex; }
    .mobile-toggle { display: block; }
    .slider-arrows { display: none; }
    .slide-indicators { bottom: 20px; }
    .download-btn-card { min-width: 160px; padding: 24px 20px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .search-box { padding: 4px 4px 4px 16px; }
    .search-box input { padding: 10px 12px; font-size: 14px; }
    .search-box .search-btn { padding: 8px 18px; font-size: 13px; }
    .hero-slider { height: 80vh; min-height: 480px; }
    .tutorial-step { flex-direction: column; text-align: center; }
    .step-img-placeholder { width: 100%; height: 160px; }
    .about-stats-mini { flex-direction: column; gap: 20px; }
}
@media (max-width: 480px) {
    .slide-overlay h1 { font-size: 32px; }
    .slide-overlay p { font-size: 14px; }
    .slide-overlay .btn-download-hero { padding: 12px 28px; font-size: 15px; }
    .stat-item .number { font-size: 28px; }
    .features-grid { grid-template-columns: 1fr; }
}