/* ============================================
   大奶 - 原创样式表
   品牌：大奶 | 域名：aimable.cn
   配色：蜜桃粉 + 深紫黑 + 暖橙
   ============================================ */

/* --- CSS Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: #0F0A1A;
    color: #F5F0FF;
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: #FF6B8A; text-decoration: none; transition: color 0.3s; }
a:hover { color: #FFB347; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: #F5F0FF; }

/* --- Container --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 70px 0; }

/* --- Header / Navigation --- */
.site-header {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    background: rgba(15, 10, 26, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 107, 138, 0.15);
    transition: all 0.3s;
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 70px;
}
.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo img { height: 42px; width: auto; }
.site-logo span { font-size: 1.3rem; font-weight: 800; color: #FF6B8A; letter-spacing: 1px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
    padding: 8px 14px; border-radius: 6px; font-size: 0.9rem; font-weight: 500;
    color: #c8c0d8; transition: all 0.3s; white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: #FF6B8A; background: rgba(255, 107, 138, 0.1); }

.search-box {
    display: flex; align-items: center; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,107,138,0.2); border-radius: 20px;
    padding: 0 14px; height: 36px; min-width: 180px;
}
.search-box input {
    background: transparent; border: none; outline: none; color: #F5F0FF;
    font-size: 0.85rem; width: 100%;
}
.search-box input::placeholder { color: #8a7fa0; }
.search-box button {
    background: none; border: none; color: #FF6B8A; cursor: pointer;
    font-size: 1rem; padding: 0 0 0 8px;
}

.mobile-toggle {
    display: none; background: none; border: none; color: #FF6B8A;
    font-size: 1.5rem; cursor: pointer;
}

/* --- Hero Section --- */
.hero-section {
    margin-top: 70px; position: relative; height: 520px; overflow: hidden;
}
.hero-slider { position: relative; width: 100%; height: 100%; }
.hero-slide {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; transition: opacity 1s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
    width: 100%; height: 100%; object-fit: cover;
    filter: brightness(0.55);
}
.hero-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(45,27,61,0.7) 0%, rgba(15,10,26,0.5) 50%, rgba(255,107,138,0.15) 100%);
    display: flex; align-items: center; justify-content: center;
}
.hero-content { text-align: center; padding: 0 20px; max-width: 800px; }
.hero-content h1 {
    font-size: 2.8rem; margin-bottom: 16px;
    background: linear-gradient(135deg, #FF6B8A, #FFB347);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-content p { font-size: 1.15rem; color: #d4cee0; margin-bottom: 28px; line-height: 1.8; }
.hero-btn {
    display: inline-block; padding: 14px 36px; border-radius: 30px;
    background: linear-gradient(135deg, #FF6B8A, #FFB347);
    color: #fff; font-weight: 700; font-size: 1rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 20px rgba(255,107,138,0.3);
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,138,0.5); color: #fff; }

.hero-dots {
    position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 10;
}
.hero-dots span {
    width: 10px; height: 10px; border-radius: 50%;
    background: rgba(255,255,255,0.3); cursor: pointer; transition: all 0.3s;
}
.hero-dots span.active { background: #FF6B8A; transform: scale(1.3); }

/* --- Section Title --- */
.section-title {
    text-align: center; margin-bottom: 50px;
}
.section-title h2 {
    font-size: 2rem; margin-bottom: 12px; position: relative; display: inline-block;
}
.section-title h2::after {
    content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%);
    width: 60px; height: 3px; background: linear-gradient(90deg, #FF6B8A, #FFB347); border-radius: 2px;
}
.section-title p { color: #9a90b0; font-size: 1rem; margin-top: 16px; }

/* --- Video Card Grid --- */
.video-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.video-card {
    background: #1A1230; border-radius: 12px; overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s; cursor: pointer;
    border: 1px solid rgba(255,107,138,0.08);
}
.video-card:hover { transform: translateY(-6px); box-shadow: 0 12px 35px rgba(255,107,138,0.15); }
.video-thumb {
    position: relative; overflow: hidden; aspect-ratio: 3/4;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 56px; height: 56px; background: rgba(255,107,138,0.85);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: opacity 0.3s;
}
.play-btn::after {
    content: ''; width: 0; height: 0;
    border-left: 18px solid #fff; border-top: 11px solid transparent; border-bottom: 11px solid transparent;
    margin-left: 4px;
}
.video-card:hover .play-btn { opacity: 1; }
.video-duration {
    position: absolute; bottom: 8px; right: 8px;
    background: rgba(0,0,0,0.7); color: #fff; padding: 2px 8px;
    border-radius: 4px; font-size: 0.75rem;
}
.video-info { padding: 14px; }
.video-info h4 { font-size: 0.95rem; margin-bottom: 8px; color: #F5F0FF; line-height: 1.4; }
.video-meta { display: flex; gap: 14px; font-size: 0.8rem; color: #8a7fa0; flex-wrap: wrap; }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tag {
    display: inline-block; padding: 2px 8px; border-radius: 3px;
    background: rgba(255,107,138,0.12); color: #FF6B8A; font-size: 0.72rem;
    margin-top: 8px;
}

/* --- Service Cards --- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
    background: linear-gradient(145deg, #1A1230, #231845);
    border-radius: 14px; padding: 32px 24px; text-align: center;
    border: 1px solid rgba(255,107,138,0.1); transition: all 0.3s;
}
.service-card:hover { border-color: rgba(255,107,138,0.3); transform: translateY(-4px); }
.service-icon {
    width: 64px; height: 64px; margin: 0 auto 18px;
    background: linear-gradient(135deg, rgba(255,107,138,0.2), rgba(255,179,71,0.2));
    border-radius: 16px; display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem;
}
.service-card h4 { font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { font-size: 0.88rem; color: #9a90b0; line-height: 1.7; }

/* --- Entertainment Grid --- */
.ent-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ent-card {
    background: #1A1230; border-radius: 12px; overflow: hidden;
    border: 1px solid rgba(255,107,138,0.08); transition: all 0.3s;
}
.ent-card:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(255,107,138,0.12); }
.ent-card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; }
.ent-card .ent-info { padding: 14px; }
.ent-card h5 { font-size: 0.95rem; margin-bottom: 6px; }
.ent-card p { font-size: 0.82rem; color: #8a7fa0; }

/* --- AI Section --- */
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
    background: linear-gradient(160deg, #1A1230, #0F0A1A);
    border-radius: 14px; padding: 30px; position: relative; overflow: hidden;
    border: 1px solid rgba(255,179,71,0.12); transition: all 0.3s;
}
.ai-card::before {
    content: ''; position: absolute; top: -50%; right: -50%;
    width: 100%; height: 100%;
    background: radial-gradient(circle, rgba(255,179,71,0.05) 0%, transparent 70%);
}
.ai-card:hover { border-color: rgba(255,179,71,0.3); }
.ai-card h4 { font-size: 1.1rem; margin-bottom: 10px; color: #FFB347; }
.ai-card p { font-size: 0.88rem; color: #9a90b0; position: relative; z-index: 1; }

/* --- Community Section --- */
.community-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.community-card {
    background: #1A1230; border-radius: 12px; padding: 28px;
    border: 1px solid rgba(255,107,138,0.08); transition: all 0.3s; text-align: center;
}
.community-card:hover { border-color: rgba(255,107,138,0.25); }
.community-icon { font-size: 2.2rem; margin-bottom: 14px; }
.community-card h5 { font-size: 1rem; margin-bottom: 8px; }
.community-card p { font-size: 0.85rem; color: #8a7fa0; }

/* --- Expert Section --- */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.expert-card {
    background: #1A1230; border-radius: 14px; overflow: hidden;
    border: 1px solid rgba(255,107,138,0.08); text-align: center; transition: all 0.3s;
}
.expert-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(255,107,138,0.12); }
.expert-avatar {
    width: 100px; height: 100px; border-radius: 50%; margin: 24px auto 14px;
    overflow: hidden; border: 3px solid rgba(255,107,138,0.3);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h4 { font-size: 1rem; margin-bottom: 4px; }
.expert-card .expert-title { font-size: 0.82rem; color: #FF6B8A; margin-bottom: 8px; }
.expert-card p { font-size: 0.82rem; color: #8a7fa0; padding: 0 16px; }
.expert-links { padding: 14px; display: flex; gap: 10px; justify-content: center; }
.expert-links a {
    padding: 6px 14px; border-radius: 18px; font-size: 0.78rem;
    border: 1px solid rgba(255,107,138,0.3); color: #FF6B8A; transition: all 0.3s;
}
.expert-links a:hover { background: rgba(255,107,138,0.15); }

/* --- Partner Wall --- */
.partner-section { background: #130E22; }
.partner-wall { text-align: center; }
.partner-wall img { max-width: 100%; border-radius: 12px; margin: 0 auto; }

/* --- How To Join --- */
.howto-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.howto-step {
    text-align: center; padding: 28px 18px;
    background: #1A1230; border-radius: 12px;
    border: 1px solid rgba(255,107,138,0.08);
}
.step-num {
    width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 14px;
    background: linear-gradient(135deg, #FF6B8A, #FFB347);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; font-weight: 800; color: #fff;
}
.howto-step h5 { font-size: 1rem; margin-bottom: 8px; }
.howto-step p { font-size: 0.85rem; color: #8a7fa0; }

/* --- Reviews --- */
.review-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.review-card {
    background: #1A1230; border-radius: 12px; padding: 24px;
    border: 1px solid rgba(255,107,138,0.08);
}
.review-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.review-avatar { width: 48px; height: 48px; border-radius: 50%; overflow: hidden; flex-shrink: 0; }
.review-avatar img { width: 100%; height: 100%; object-fit: cover; }
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { font-size: 0.78rem; color: #8a7fa0; }
.review-stars { color: #FFB347; font-size: 0.85rem; margin-bottom: 10px; }
.review-card p { font-size: 0.88rem; color: #c8c0d8; line-height: 1.7; }

/* --- FAQ --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: #1A1230; border-radius: 10px; margin-bottom: 12px;
    border: 1px solid rgba(255,107,138,0.08); overflow: hidden;
}
.faq-question {
    padding: 18px 22px; cursor: pointer; display: flex;
    justify-content: space-between; align-items: center;
    font-weight: 600; font-size: 0.95rem; transition: background 0.3s;
}
.faq-question:hover { background: rgba(255,107,138,0.05); }
.faq-question .faq-toggle { color: #FF6B8A; font-size: 1.2rem; transition: transform 0.3s; }
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s;
    padding: 0 22px; font-size: 0.88rem; color: #9a90b0; line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* --- Footer --- */
.site-footer {
    background: #0A0714; border-top: 1px solid rgba(255,107,138,0.1);
    padding: 50px 0 0;
}
.footer-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
    padding-bottom: 40px; border-bottom: 1px solid rgba(255,107,138,0.08);
}
.footer-col h5 { font-size: 1rem; margin-bottom: 16px; color: #FF6B8A; }
.footer-col p, .footer-col a { font-size: 0.85rem; color: #8a7fa0; display: block; margin-bottom: 8px; }
.footer-col a:hover { color: #FFB347; }
.footer-qr { display: flex; gap: 16px; margin-top: 10px; }
.footer-qr img { width: 100px; height: 100px; border-radius: 8px; border: 1px solid rgba(255,107,138,0.15); }
.footer-qr-label { font-size: 0.75rem; color: #8a7fa0; text-align: center; margin-top: 4px; }
.footer-bottom {
    text-align: center; padding: 20px 0; font-size: 0.82rem; color: #5a5270;
}
.social-share { display: flex; gap: 12px; justify-content: center; margin: 20px 0; }
.social-share a {
    width: 40px; height: 40px; border-radius: 50%;
    background: rgba(255,107,138,0.1); display: flex; align-items: center; justify-content: center;
    color: #FF6B8A; font-size: 1rem; transition: all 0.3s;
}
.social-share a:hover { background: #FF6B8A; color: #fff; }

/* --- Breadcrumb --- */
.breadcrumb {
    padding: 14px 0; font-size: 0.85rem; color: #8a7fa0;
    margin-top: 70px;
}
.breadcrumb a { color: #FF6B8A; }
.breadcrumb span { margin: 0 8px; }

/* --- Inner Page --- */
.inner-hero {
    margin-top: 70px; padding: 60px 0; text-align: center;
    background: linear-gradient(135deg, #1A1230, #0F0A1A);
    border-bottom: 1px solid rgba(255,107,138,0.1);
}
.inner-hero h1 { font-size: 2.2rem; margin-bottom: 12px; }
.inner-hero p { color: #9a90b0; font-size: 1rem; }

.content-section { padding: 50px 0; }
.content-section h2 { font-size: 1.6rem; margin-bottom: 18px; }
.content-section h3 { font-size: 1.3rem; margin-bottom: 14px; color: #FF6B8A; }
.content-section p { margin-bottom: 16px; color: #c8c0d8; font-size: 0.95rem; }

/* --- Tags --- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.tag-cloud span {
    padding: 4px 12px; border-radius: 14px; font-size: 0.78rem;
    background: rgba(255,107,138,0.1); color: #FF6B8A; border: 1px solid rgba(255,107,138,0.15);
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px;
    border-radius: 50%; background: linear-gradient(135deg, #FF6B8A, #FFB347);
    color: #fff; display: none; align-items: center; justify-content: center;
    font-size: 1.2rem; cursor: pointer; z-index: 999;
    box-shadow: 0 4px 15px rgba(255,107,138,0.3); transition: all 0.3s;
}
.back-to-top:hover { transform: translateY(-3px); }
.back-to-top.show { display: flex; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .video-grid { grid-template-columns: repeat(3, 1fr); }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 70px; left: 0; width: 100%;
        background: rgba(15,10,26,0.98); flex-direction: column; padding: 20px;
        border-bottom: 1px solid rgba(255,107,138,0.15);
    }
    .main-nav.open { display: flex; }
    .mobile-toggle { display: block; }
    .search-box { min-width: 120px; }
    .hero-section { height: 400px; }
    .hero-content h1 { font-size: 1.8rem; }
    .video-grid { grid-template-columns: repeat(2, 1fr); }
    .service-grid { grid-template-columns: 1fr; }
    .ent-grid { grid-template-columns: repeat(2, 1fr); }
    .ai-grid { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: 1fr; }
    .howto-steps { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .header-inner { padding: 0 15px; }
}
@media (max-width: 480px) {
    .video-grid { grid-template-columns: 1fr; }
    .ent-grid { grid-template-columns: 1fr; }
    .howto-steps { grid-template-columns: 1fr; }
    .hero-section { height: 320px; }
    .hero-content h1 { font-size: 1.5rem; }
}