/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --gold: #d4a843;
    --gold-light: #f0d68a;
    --gold-dark: #8b6914;
    --dark: #0a0a0f;
    --dark-2: #14141f;
    --dark-3: #1e1e2e;
    --text: #e8e6e3;
    --text-dim: #9898a8;
    --accent: #c0392b;
    --accent-bright: #e74c3c;
    --gradient-hero: linear-gradient(180deg, rgba(10,10,15,0.2) 0%, rgba(10,10,15,0.7) 60%, #0a0a0f 100%);
    --gradient-card: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --font-title: 'PingFang SC', 'Microsoft YaHei', 'Noto Serif SC', serif;
    --font-body: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 3px; }

/* ===== Navigation ===== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 0 40px; height: 70px;
    display: flex; align-items: center; justify-content: space-between;
    transition: all 0.4s ease;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}
.nav.scrolled {
    background: rgba(10,10,15,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 40px rgba(0,0,0,0.5);
    border-bottom: 1px solid rgba(212,168,67,0.15);
}
.nav-logo {
    display: flex; align-items: center; gap: 12px;
    text-decoration: none; color: var(--gold);
    font-family: var(--font-title); font-size: 1.25rem; font-weight: 700;
    letter-spacing: 2px;
}
.nav-logo img { height: 40px; width: auto; border-radius: 8px; }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
    color: rgba(255,255,255,0.7); text-decoration: none;
    font-size: 0.9rem; letter-spacing: 1px;
    transition: color 0.3s; position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%) scaleX(0);
    width: 100%; height: 2px; background: var(--gold);
    transition: transform 0.3s;
}
.nav-links a:hover { color: var(--gold); }
.nav-links a:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.nav-toggle span { width: 26px; height: 2px; background: var(--text); transition: all 0.3s; }

/* ===== Hero Section ===== */
.hero {
    position: relative; height: 100vh; min-height: 700px;
    display: flex; align-items: center; justify-content: center;
    text-align: center; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img {
    width: 100%; height: 100%; object-fit: cover; object-position: center top;
    filter: brightness(0.5);
}
.hero-overlay {
    position: absolute; inset: 0; z-index: 1;
    background: var(--gradient-hero);
}
.hero-particle {
    position: absolute; z-index: 2; pointer-events: none;
    width: 4px; height: 4px; background: var(--gold);
    border-radius: 50%; animation: floatUp 4s infinite;
    opacity: 0;
}
@keyframes floatUp {
    0% { transform: translateY(0) scale(1); opacity: 0; }
    10% { opacity: 1; }
    80% { opacity: 0.8; }
    100% { transform: translateY(-100vh) scale(0); opacity: 0; }
}
.hero-content { position: relative; z-index: 10; max-width: 800px; padding: 0 20px; }
.hero-badge {
    display: inline-block; padding: 6px 20px;
    border: 1px solid var(--gold); border-radius: 50px;
    color: var(--gold-light); font-size: 0.85rem; letter-spacing: 3px;
    margin-bottom: 30px;
    animation: fadeInDown 0.8s ease;
}
.hero-title {
    font-family: var(--font-title); font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 900; color: var(--gold-light); line-height: 1.3;
    text-shadow: 0 0 60px rgba(212,168,67,0.3);
    margin-bottom: 20px; letter-spacing: 4px;
    animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem); color: rgba(255,255,255,0.7);
    margin-bottom: 40px; letter-spacing: 2px;
    animation: fadeInUp 0.8s ease 0.4s both;
}
.hero-buttons { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; animation: fadeInUp 0.8s ease 0.6s both; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 36px; border-radius: 50px;
    font-size: 1rem; font-family: var(--font-title); letter-spacing: 2px;
    text-decoration: none; cursor: pointer; transition: all 0.3s;
    border: none; font-weight: 600;
}
.btn-primary {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--dark); box-shadow: 0 4px 25px rgba(212,168,67,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 35px rgba(212,168,67,0.6); }
.btn-outline {
    background: transparent; color: var(--gold);
    border: 2px solid var(--gold);
}
.btn-outline:hover { background: rgba(212,168,67,0.1); transform: translateY(-2px); }
.hero-scroll-hint {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 10;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    animation: bounce 2s infinite; color: rgba(255,255,255,0.5);
}
.hero-scroll-hint span { font-size: 0.8rem; letter-spacing: 2px; }
.hero-scroll-hint svg { width: 20px; height: 20px; }
@keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Section Common ===== */
.section { padding: 100px 20px; position: relative; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block; color: var(--gold); font-size: 0.8rem;
    letter-spacing: 4px; text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
    font-family: var(--font-title); font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800; color: var(--gold-light); letter-spacing: 2px;
    margin-bottom: 16px;
}
.section-desc { color: var(--text-dim); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.container { max-width: 1200px; margin: 0 auto; }

/* ===== About Section ===== */
.about { background: var(--dark-2); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-video {
    position: relative; border-radius: 16px; overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    border: 1px solid rgba(212,168,67,0.15);
}
.about-video video { width: 100%; display: block; }
.about-info h3 {
    font-family: var(--font-title); font-size: 1.6rem; color: var(--gold-light);
    margin-bottom: 24px; letter-spacing: 2px;
}
.about-info p { color: var(--text-dim); margin-bottom: 20px; font-size: 0.95rem; }
.about-info strong { color: var(--gold); }
.about-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.about-tag {
    padding: 8px 20px; border-radius: 50px;
    background: rgba(212,168,67,0.08); border: 1px solid rgba(212,168,67,0.2);
    color: var(--gold); font-size: 0.85rem; letter-spacing: 1px;
}

/* ===== Features Section ===== */
.features { background: var(--dark); }
.features-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.feature-card {
    background: var(--dark-3); border-radius: 16px; overflow: hidden;
    border: 1px solid rgba(212,168,67,0.08);
    transition: all 0.4s ease; position: relative;
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    border-color: rgba(212,168,67,0.25);
}
.feature-card-image {
    width: 100%; aspect-ratio: 16/10; overflow: hidden;
    position: relative;
}
.feature-card-image img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform 0.6s; }
.feature-card:hover .feature-card-image img { transform: scale(1.05); }
.feature-card-body { padding: 24px; }
.feature-card-body h4 {
    font-family: var(--font-title); font-size: 1.15rem; color: var(--gold-light);
    margin-bottom: 10px; letter-spacing: 1px;
}
.feature-card-body p { color: var(--text-dim); font-size: 0.9rem; }

/* ===== Screenshots Section ===== */
.screenshots { background: var(--dark-2); }
.screenshots-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.screenshot-item {
    border-radius: 12px; overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    transition: all 0.4s ease; cursor: pointer;
    position: relative;
    border: 1px solid rgba(212,168,67,0.1);
}
.screenshot-item:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.6); }
.screenshot-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.screenshot-item::after {
    content: '点击放大';
    position: absolute; inset: 0;
    background: rgba(0,0,0,0.6); color: var(--gold-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem; letter-spacing: 2px;
    opacity: 0; transition: opacity 0.3s;
}
.screenshot-item:hover::after { opacity: 1; }

/* ===== Lightbox ===== */
.lightbox {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(0,0,0,0.9);
    display: none; align-items: center; justify-content: center;
    cursor: pointer; padding: 40px;
}
.lightbox.active { display: flex; }
.lightbox img { max-width: 90vw; max-height: 85vh; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.8); }
.lightbox-close {
    position: absolute; top: 20px; right: 30px;
    font-size: 2rem; color: var(--text); cursor: pointer;
    background: none; border: none; z-index: 1;
}

/* ===== Benefits Section ===== */
.benefits { background: var(--dark); }
.benefits-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.benefit-card {
    background: linear-gradient(135deg, rgba(212,168,67,0.05), rgba(240,214,138,0.02));
    border: 1px solid rgba(212,168,67,0.12);
    border-radius: 16px; padding: 32px 24px;
    position: relative; overflow: hidden;
    transition: all 0.3s ease;
}
.benefit-card:hover {
    border-color: rgba(212,168,67,0.3);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.benefit-icon {
    font-size: 2.2rem; margin-bottom: 16px;
    width: 56px; height: 56px;
    background: rgba(212,168,67,0.1);
    border-radius: 14px; display: flex; align-items: center; justify-content: center;
}
.benefit-card h4 {
    font-family: var(--font-title); font-size: 1.05rem;
    color: var(--gold-light); margin-bottom: 8px; letter-spacing: 1px;
}
.benefit-card p { color: var(--text-dim); font-size: 0.9rem; }

/* ===== CTA Section ===== */
.cta-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    position: relative; overflow: hidden;
}
.cta-section::before {
    content: ''; position: absolute; inset: 0;
    background: url('../images/banner/banner907df2489e1424374aa4e374dad7fe2b1785231362.jpg') center/cover no-repeat;
    opacity: 0.08; z-index: 0;
}
.cta-content { position: relative; z-index: 1; text-align: center; }
.cta-content h2 {
    font-family: var(--font-title); font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: var(--gold-light); margin-bottom: 16px; letter-spacing: 2px;
}
.cta-content p { color: var(--text-dim); margin-bottom: 30px; }
.cta-buttons {
    display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
}
.btn-android {
    background: linear-gradient(135deg, #3ddc84, #00a86b);
    color: #fff; box-shadow: 0 4px 20px rgba(61,220,132,0.3);
}
.btn-android:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(61,220,132,0.5); }
.btn-ios {
    background: linear-gradient(135deg, #4a90d9, #2b5ea7);
    color: #fff; box-shadow: 0 4px 20px rgba(74,144,217,0.3);
}
.btn-ios:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(74,144,217,0.5); }

/* Hero Button QR Code Tooltip */
.btn-qr-wrapper { position: relative; display: inline-block; }
.qrcode-tooltip {
    position: absolute; top: calc(100% + 16px); left: 50%; transform: translateX(-50%);
    background: rgba(20,20,31,0.97); border: 1px solid rgba(212,168,67,0.25);
    border-radius: 12px; padding: 16px; text-align: center;
    opacity: 0; visibility: hidden; transition: all 0.3s ease;
    z-index: 50; white-space: nowrap;
    pointer-events: none;
}
.btn-qr-wrapper:hover .qrcode-tooltip {
    opacity: 1; visibility: visible;
}
.qrcode-tooltip::before {
    content: ''; position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
    border-left: 8px solid transparent; border-right: 8px solid transparent;
    border-bottom: 8px solid rgba(212,168,67,0.25);
}
.qrcode-inner { display: inline-block; }
.qrcode-inner canvas,
.qrcode-inner img { display: block; border-radius: 6px; }
.qrcode-tooltip span { display: block; color: var(--text-dim); font-size: 0.75rem; margin-top: 8px; letter-spacing: 1px; }

/* CTA QR Code */
.cta-qrcode {
    text-align: center; margin-top: 32px;
    display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.cta-qrcode-img { display: inline-block; background: #fff; padding: 12px; border-radius: 12px; }
.cta-qrcode-img canvas,
.cta-qrcode-img img { display: block; }
.cta-qrcode span { color: var(--text-dim); font-size: 0.85rem; letter-spacing: 1px; }

.cta-info { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-top: 40px; }
.cta-info-item { text-align: center; }
.cta-info-item span {
    display: block; font-size: 1.5rem; color: var(--gold);
    font-family: var(--font-title); font-weight: 700;
}
.cta-info-item small { color: var(--text-dim); font-size: 0.8rem; letter-spacing: 1px; }

/* ===== Friend Links ===== */
.friend-links {
    background: var(--dark);
    padding: 60px 20px;
    border-top: 1px solid rgba(212,168,67,0.08);
}
.friend-links-title {
    text-align: center;
    font-family: var(--font-title);
    font-size: 1.3rem;
    color: var(--gold-light);
    letter-spacing: 2px;
    margin-bottom: 30px;
}
.friend-links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}
.friend-links-grid a {
    display: inline-block;
    padding: 10px 24px;
    border: 1px solid rgba(212,168,67,0.15);
    border-radius: 50px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    background: rgba(212,168,67,0.03);
}
.friend-links-grid a:hover {
    color: var(--gold);
    border-color: rgba(212,168,67,0.4);
    background: rgba(212,168,67,0.08);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(212,168,67,0.1);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-2); border-top: 1px solid rgba(212,168,67,0.1);
    padding: 40px 20px; text-align: center;
}
.footer p { color: var(--text-dim); font-size: 0.8rem; margin-bottom: 8px; }
.footer a { color: var(--gold); text-decoration: none; }
.footer-title {
    font-family: var(--font-title); font-size: 1rem; color: var(--gold-light);
    letter-spacing: 2px; margin-bottom: 12px;
}
.footer-copy { margin-top: 12px; }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 200;
    width: 48px; height: 48px; border-radius: 50%;
    background: rgba(212,168,67,0.12); border: 1px solid rgba(212,168,67,0.3);
    color: var(--gold); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.back-to-top.visible {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.back-to-top:hover {
    background: rgba(212,168,67,0.25);
    border-color: var(--gold);
    box-shadow: 0 4px 20px rgba(212,168,67,0.3);
    transform: translateY(-3px);
}
.back-to-top.visible:hover { transform: translateY(-3px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .screenshots-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav { padding: 0 20px; height: 60px; }
    .nav-links {
        position: fixed; top: 60px; left: 0; right: 0;
        background: rgba(10,10,15,0.95); backdrop-filter: blur(20px);
        flex-direction: column; padding: 20px; gap: 16px;
        transform: translateY(-120%); transition: transform 0.4s ease;
        border-bottom: 1px solid rgba(212,168,67,0.15);
        z-index: 99;
    }
    .nav-links.active { transform: translateY(0); }
    .nav-links a { font-size: 1rem; padding: 8px 0; }
    .nav-toggle { display: flex; }
    .hero { min-height: 600px; }
    .section { padding: 60px 16px; }
    .screenshots-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .features-grid { grid-template-columns: 1fr; }
    .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-info { gap: 20px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-buttons { flex-direction: column; align-items: stretch; }
    .hero .btn-qr-wrapper { display: block; }
    .btn { width: 100%; justify-content: center; }
    .screenshots-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .benefits-grid { grid-template-columns: 1fr; }
}