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

:root {
    --gold: #d4a843;
    --gold-light: #f0d68a;
    --red: #c0392b;
    --red-dark: #8b1a1a;
    --dark: #0a0a0a;
    --dark-card: #1a1a2e;
    --dark-card2: #16213e;
    --text: #e0e0e0;
    --text-dim: #999;
    --gradient-gold: linear-gradient(135deg, #d4a843, #f0d68a, #d4a843);
    --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #1a1a2e 100%);
    --gradient-red: linear-gradient(135deg, #8b1a1a, #c0392b);
    --shadow-gold: 0 0 30px rgba(212,168,67,0.3);
    --shadow-red: 0 0 20px rgba(192,57,43,0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --max-width: 1200px;
    --header-h: 70px;
}

html { scroll-behavior: smooth; }
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    background: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: '';
    position: fixed; top:0; left:0; width:100%; height:100%;
    background: radial-gradient(ellipse at 50% 0%, rgba(212,168,67,0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(192,57,43,0.04) 0%, transparent 50%);
    pointer-events: none; z-index: 0;
}

img { max-width:100%; height:auto; display:block; }
a { color: var(--gold); text-decoration:none; transition: color .3s; }
a:hover { color: var(--gold-light); }
.container { max-width: var(--max-width); margin:0 auto; padding:0 20px; position:relative; z-index:1; }

/* ========== Header ========== */
.header {
    position: fixed; top:0; left:0; width:100%; height: var(--header-h);
    background: transparent;
    border-bottom: 1px solid transparent;
    z-index: 1000; display:flex; align-items:center;
    transition: background .4s, border-color .4s;
}
.header.scrolled {
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(20px);
    border-bottom-color: rgba(212,168,67,0.3);
}
.header .container { display:flex; align-items:center; justify-content:space-between; width:100%; }
.logo { display:flex; align-items:center; gap:10px; font-size:1.15rem; font-weight:700; color:var(--gold-light); cursor:pointer; }
.logo img { width:40px; height:40px; border-radius:8px; object-fit:cover; }
.nav { display:flex; gap:32px; list-style:none; }
.nav a { font-size:.93rem; color:#bbb; font-weight:500; position:relative; padding:4px 0; cursor:pointer; }
.nav a::after {
    content: ''; position:absolute; bottom:0; left:50%; transform:translateX(-50%);
    width:0; height:2px; background:var(--gradient-gold); border-radius:2px;
    transition:width .3s;
}
.nav a:hover, .nav a.active { color:var(--gold-light); }
.nav a:hover::after, .nav a.active::after { width:100%; }
.btn-download-sm {
    display:inline-flex; align-items:center; gap:6px;
    padding:8px 20px; background:var(--gradient-red); color:#fff;
    border-radius:25px; font-size:.88rem; font-weight:600;
    border:none; cursor:pointer; transition:all .3s;
    white-space:nowrap;
}
.btn-download-sm:hover { transform:translateY(-2px); box-shadow:var(--shadow-red); color:#fff; }
.menu-toggle { display:none; flex-direction:column; gap:5px; cursor:pointer; z-index:1001; background:none; border:none; padding:5px; }
.menu-toggle span { display:block; width:26px; height:2.5px; background:var(--gold-light); border-radius:2px; transition:all .3s; }
.menu-toggle.active span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.menu-toggle.active span:nth-child(2) { opacity:0; }
.menu-toggle.active span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }

/* ========== Hero ========== */
.hero {
    min-height:100vh; display:flex; align-items:center; justify-content:center;
    position:relative; overflow:hidden; padding: calc(var(--header-h) + 40px) 20px 60px;
}
.hero .parallax-bg {
    position:absolute; top:0; left:0; width:100%; height:100%;
    object-fit:cover; opacity:0.35; z-index:0;
}
.hero .hero-overlay {
    position:absolute; inset:0;
    background: linear-gradient(180deg, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.85) 80%, var(--dark) 100%);
    z-index:1;
}
.hero-content { text-align:center; position:relative; z-index:2; max-width:800px; }
.hero-tag {
    display:inline-block; padding:6px 20px; border:1px solid rgba(212,168,67,0.4);
    border-radius:30px; font-size:.85rem; color:var(--gold-light);
    background:rgba(212,168,67,0.08); margin-bottom:24px;
    letter-spacing:2px; backdrop-filter:blur(10px);
}
.hero h1 {
    font-size:clamp(2rem, 5vw, 3.6rem); font-weight:900; line-height:1.2;
    margin-bottom:16px;
}
.hero h1 .gradient-text {
    background: var(--gradient-gold);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle { font-size:1.15rem; color:#bbb; margin-bottom:32px; max-width:600px; margin-left:auto; margin-right:auto; }
.hero-meta { display:flex; gap:24px; justify-content:center; flex-wrap:wrap; margin-bottom:40px; }
.hero-meta span {
    padding:8px 18px; background:rgba(255,255,255,0.05);
    border-radius:8px; font-size:.9rem; color:#ccc;
    border:1px solid rgba(255,255,255,0.08);
}
.hero-meta span strong { color:var(--gold-light); }
.btn-group { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }
.btn-primary {
    display:inline-flex; align-items:center; gap:8px;
    padding:14px 40px; font-size:1.1rem; font-weight:700;
    background:var(--gradient-gold); color:#1a1a1a;
    border-radius:50px; border:none; cursor:pointer;
    transition:all .3s; box-shadow:0 4px 20px rgba(212,168,67,0.35);
}
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 8px 30px rgba(212,168,67,0.5); color:#1a1a1a; }
.btn-secondary {
    display:inline-flex; align-items:center; gap:8px;
    padding:14px 40px; font-size:1.1rem; font-weight:600;
    background:transparent; color:var(--gold-light);
    border-radius:50px; border:2px solid var(--gold);
    cursor:pointer; transition:all .3s;
}
.btn-secondary:hover { background:rgba(212,168,67,0.1); transform:translateY(-3px); }

/* ========== QR Code Tooltip (Hero Button Hover) ========== */
.btn-qr-trigger { position:relative; }
.btn-qr-trigger .qr-tooltip {
    position:absolute; top:calc(100% + 14px); left:50%; transform:translateX(-50%);
    opacity:0; visibility:hidden; transition:opacity .25s, visibility .25s;
    z-index:100; pointer-events:none;
    width: 160px;
}
.qr-tooltip-inner {
    background:#fff; border-radius:12px; padding:12px;
    box-shadow:0 12px 40px rgba(0,0,0,0.35);
    display:flex; flex-direction:column; align-items:center; gap:8px;
}
.qr-tooltip-inner canvas,
.qr-tooltip-inner img { display:block; width:140px; height:140px; border-radius:6px; }
.qr-tooltip-inner span {
    font-size:.78rem; color:#666; font-weight:500;
}
@media (hover: hover) {
    .btn-qr-trigger:hover .qr-tooltip {
        opacity:1; visibility:visible;
    }
}

/* ========== CTA QR Code ========== */
.cta-qr {
    display:flex; flex-direction:column; align-items:center; gap:8px;
    margin-top:32px;
}
.cta-qr canvas,
.cta-qr img { display:block; width:160px; height:160px; border-radius:12px;
    background:#fff; padding:8px; box-shadow:0 4px 20px rgba(0,0,0,0.3); }
.cta-qr p { font-size:.85rem; color:var(--text-dim); margin:0; }

/* ========== Section Common ========== */
.section { padding:80px 0; position:relative; }
.section-header { text-align:center; margin-bottom:56px; }
.section-header .badge {
    display:inline-block; padding:5px 16px; font-size:.8rem;
    color:var(--gold); border:1px solid rgba(212,168,67,0.3);
    border-radius:20px; letter-spacing:3px; margin-bottom:16px;
    text-transform:uppercase;
}
.section-title {
    font-size:clamp(1.6rem, 3.5vw, 2.4rem); font-weight:800;
    margin-bottom:12px; line-height:1.3;
}
.section-title .highlight { color:var(--gold-light); }
.section-desc { color:var(--text-dim); font-size:1.05rem; max-width:600px; margin:0 auto; }

/* ========== Intro Section ========== */
.intro-grid {
    display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center;
}
.intro-image-wrapper {
    position:relative; border-radius:var(--radius-lg); overflow:hidden;
    box-shadow:0 20px 60px rgba(0,0,0,0.5); aspect-ratio:16/10;
}
.intro-image-wrapper img { width:100%; height:100%; object-fit:cover; }
.intro-image-wrapper::after {
    content:''; position:absolute; inset:0;
    border:2px solid rgba(212,168,67,0.2); border-radius:var(--radius-lg); pointer-events:none;
}
.intro-text h3 { font-size:1.8rem; font-weight:700; margin-bottom:20px; color:#fff; }
.intro-text h3 span { color:var(--gold-light); }
.intro-text p { color:#bbb; margin-bottom:16px; font-size:.98rem; }
.intro-features { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:24px; }
.intro-feature {
    display:flex; align-items:center; gap:10px; padding:12px 16px;
    background:var(--dark-card); border-radius:var(--radius);
    border:1px solid rgba(255,255,255,0.06); transition:all .3s;
}
.intro-feature:hover { border-color:rgba(212,168,67,0.3); transform:translateY(-2px); }
.intro-feature .feat-icon { width:36px; height:36px; background:var(--gradient-gold); border-radius:8px; display:flex; align-items:center; justify-content:center; font-size:1.1rem; color:#1a1a1a; flex-shrink:0; }
.intro-feature span { font-size:.88rem; color:#ddd; }

/* ========== Screenshots Section ========== */
.screenshots-grid { display:grid; grid-template-columns:repeat(2, 1fr); gap:20px; }
.screenshot-card {
    border-radius:var(--radius-lg); overflow:hidden; cursor:pointer;
    transition:all .4s; position:relative; aspect-ratio:480/221;
    box-shadow:0 8px 30px rgba(0,0,0,0.4);
}
.screenshot-card img { width:100%; height:100%; object-fit:cover; transition:transform .5s; }
.screenshot-card:hover { transform:translateY(-8px); box-shadow:0 20px 50px rgba(212,168,67,0.2); }
.screenshot-card:hover img { transform:scale(1.08); }
.screenshot-card .overlay {
    position:absolute; bottom:0; left:0; right:0; padding:20px;
    background:linear-gradient(transparent, rgba(0,0,0,0.85));
    transform:translateY(100%); transition:transform .4s;
}
.screenshot-card:hover .overlay { transform:translateY(0); }
.screenshot-card .overlay span { color:#fff; font-weight:600; font-size:.9rem; }

/* ========== Features Section ========== */
.features-grid { display:grid; grid-template-columns:repeat(2, 1fr); gap:24px; }
.feature-card {
    background:var(--dark-card); border-radius:var(--radius-lg);
    padding:36px 28px; border:1px solid rgba(255,255,255,0.06);
    transition:all .4s; position:relative; overflow:hidden;
}
.feature-card::before {
    content:''; position:absolute; top:0; left:0; width:100%; height:3px;
    background:var(--gradient-gold); transform:scaleX(0); transform-origin:left;
    transition:transform .4s;
}
.feature-card:hover::before { transform:scaleX(1); }
.feature-card:hover { border-color:rgba(212,168,67,0.25); transform:translateY(-6px); box-shadow:var(--shadow-gold); }
.feature-card .card-icon {
    width:56px; height:56px; border-radius:14px;
    display:flex; align-items:center; justify-content:center;
    font-size:1.6rem; margin-bottom:20px;
    background:rgba(212,168,67,0.1); color:var(--gold-light);
}
.feature-card h4 { font-size:1.2rem; font-weight:700; margin-bottom:10px; color:#fff; }
.feature-card p { color:var(--text-dim); font-size:.9rem; }

/* ========== Benefits Section ========== */
.benefits-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(300px, 1fr)); gap:20px; }
.benefit-item {
    display:flex; align-items:flex-start; gap:16px;
    padding:20px 24px; background:var(--dark-card2);
    border-radius:var(--radius); border:1px solid rgba(255,255,255,0.05);
    transition:all .3s;
}
.benefit-item:hover { border-color:rgba(212,168,67,0.3); transform:translateX(4px); }
.benefit-item .benefit-star { color:var(--gold); font-size:1.3rem; flex-shrink:0; margin-top:2px; }
.benefit-item h5 { font-size:.95rem; color:#fff; margin-bottom:4px; }
.benefit-item p { font-size:.85rem; color:var(--text-dim); }

/* ========== CTA Section ========== */
.cta-section {
    background:var(--gradient-dark); position:relative; overflow:hidden;
    text-align:center; padding:80px 0;
}
.cta-section::before {
    content:''; position:absolute; top:0; left:50%; transform:translateX(-50%);
    width:600px; height:600px; border-radius:50%;
    background:radial-gradient(circle, rgba(212,168,67,0.08) 0%, transparent 70%);
    pointer-events:none;
}
.cta-section h2 { font-size:clamp(1.8rem, 4vw, 2.8rem); font-weight:900; margin-bottom:16px; position:relative; }
.cta-section h2 .gold { color:var(--gold-light); }
.cta-section p { color:#bbb; font-size:1.1rem; margin-bottom:32px; position:relative; }
.cta-buttons { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; position:relative; }
.btn-cta-ios {
    display:inline-flex; align-items:center; gap:10px; padding:16px 40px;
    font-size:1.1rem; font-weight:700; background:#000; color:#fff;
    border-radius:50px; border:2px solid #333; cursor:pointer; transition:all .3s;
}
.btn-cta-ios:hover { border-color:var(--gold); transform:translateY(-3px); }
.btn-cta-android {
    display:inline-flex; align-items:center; gap:10px; padding:16px 40px;
    font-size:1.1rem; font-weight:700; background:var(--gradient-gold); color:#1a1a1a;
    border-radius:50px; border:none; cursor:pointer; box-shadow:0 4px 20px rgba(212,168,67,0.4);
    transition:all .3s;
}
.btn-cta-android:hover { transform:translateY(-3px); box-shadow:0 8px 30px rgba(212,168,67,0.6); color:#1a1a1a; }

/* ========== Guide Section ========== */
.guide-content {
    max-width:900px; margin:0 auto;
    background:var(--dark-card); border-radius:var(--radius-lg);
    padding:40px; border:1px solid rgba(255,255,255,0.06);
}
.guide-content .guide-block {
    margin-bottom:36px;
}
.guide-content .guide-block:last-of-type {
    margin-bottom:0;
}
.guide-content h4 {
    font-size:1.35rem; color:var(--gold-light); margin-bottom:20px;
    padding-bottom:12px; border-bottom:1px solid rgba(212,168,67,0.2);
}
.guide-content .guide-subsection {
    margin-bottom:18px;
}
.guide-content h5 {
    font-size:1.05rem; color:#ddd; margin-bottom:8px;
}
.guide-content p { color:#bbb; font-size:.95rem; margin-bottom:12px; line-height:1.8; }
.guide-content p strong { color:#e8e8e8; }
.guide-content .text-gold { color:var(--gold-light); }

.guide-images {
    display:flex; flex-wrap:wrap; gap:20px; margin:20px 0 28px;
    justify-content:center;
}
.guide-images .guide-img-card {
    max-width:100%; border-radius:var(--radius);
    overflow:hidden; background:rgba(0,0,0,0.3);
    border:1px solid rgba(255,255,255,0.08);
    transition:border-color .3s;
}
.guide-images .guide-img-card:hover {
    border-color:rgba(212,168,67,0.35);
}
.guide-images .guide-img-card img {
    width:100%; height:auto; display:block; cursor:pointer;
    transition:transform .4s;
}
.guide-images .guide-img-card:hover img {
    transform:scale(1.03);
}
.guide-images .guide-img-card span {
    display:block; padding:10px 14px; font-size:.82rem;
    color:var(--text-dim); text-align:center;
}
.guide-images-dual .guide-img-card {
    flex:1; min-width:260px; max-width:48%;
}
.guide-highlight {
    background:rgba(212,168,67,0.08); border:1px solid rgba(212,168,67,0.25);
    border-radius:var(--radius); padding:20px 24px; margin:24px 0;
}
.guide-highlight h5 { color:var(--gold-light); }

.guide-download {
    display:inline-flex; align-items:center; gap:8px;
    margin-top:28px; padding:12px 28px; background:rgba(212,168,67,0.1);
    border:1px solid rgba(212,168,67,0.3); border-radius:30px;
    color:var(--gold-light); font-weight:600; cursor:pointer; transition:all .3s;
}
.guide-download:hover { background:rgba(212,168,67,0.2); }

/* ========== Footer ========== */
.footer {
    background:#050505; border-top:1px solid rgba(255,255,255,0.06);
    padding:48px 0 24px; text-align:center;
}
.footer-logo { display:flex; align-items:center; justify-content:center; gap:8px; margin-bottom:16px; }
.footer-logo img { width:32px; height:32px; border-radius:6px; }
.footer-logo span { font-weight:700; color:var(--gold-light); font-size:1rem; }
.footer p { color:var(--text-dim); font-size:.82rem; margin-bottom:8px; }
.footer .links { display:flex; gap:20px; justify-content:center; flex-wrap:wrap; margin-bottom:20px; }
.footer .links a { font-size:.82rem; color:var(--text-dim); cursor:pointer; }
.footer .links a:hover { color:var(--gold-light); }
.friend-links {
    display:flex; align-items:center; justify-content:center;
    flex-wrap:wrap; gap:4px 16px; margin-bottom:16px;
    padding-bottom:16px; border-bottom:1px solid rgba(255,255,255,0.05);
}
.friend-links span { color:#555; font-size:.8rem; }
.friend-links a {
    color:#666; font-size:.8rem; transition:color .25s;
}
.friend-links a:hover { color:var(--gold-light); }
.footer .copyright { font-size:.78rem; color:#555; }

/* ========== Back to Top ========== */
.back-to-top {
    position:fixed; bottom:32px; right:32px; z-index:999;
    width:48px; height:48px; border-radius:50%;
    background:rgba(212,168,67,0.2); border:1px solid rgba(212,168,67,0.35);
    color:var(--gold-light); cursor:pointer;
    display:flex; align-items:center; justify-content:center;
    opacity:0; visibility:hidden; transform:translateY(20px);
    transition:all .35s ease;
    backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px);
}
.back-to-top.visible { opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover { background:rgba(212,168,67,0.35); transform:translateY(-3px); }
.back-to-top.visible:hover { transform:translateY(-3px); }

/* ========== Lightbox ========== */
.lightbox {
    position:fixed; inset:0; background:rgba(0,0,0,0.95);
    z-index:9999; display:flex; align-items:center; justify-content:center;
    opacity:0; pointer-events:none; transition:opacity .3s; cursor:pointer;
}
.lightbox.active { opacity:1; pointer-events:auto; }
.lightbox img { max-width:90vw; max-height:85vh; border-radius:var(--radius); }
.lightbox .close {
    position:absolute; top:24px; right:32px; font-size:2rem;
    color:#fff; cursor:pointer; width:48px; height:48px;
    display:flex; align-items:center; justify-content:center;
    background:rgba(255,255,255,0.1); border-radius:50%; transition:all .3s;
}
.lightbox .close:hover { background:rgba(255,255,255,0.2); }

/* ========== Scroll Animations ========== */
.fade-in { opacity:0; transform:translateY(30px); transition:all .7s ease-out; }
.fade-in.visible { opacity:1; transform:translateY(0); }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .header { height:60px; }
    .nav {
        position:fixed; top:0; right:-100%; width:75%; max-width:320px; height:100vh;
        background:rgba(10,10,10,0.98); backdrop-filter:blur(30px);
        flex-direction:column; gap:8px; padding:90px 32px 32px;
        transition:right .4s; z-index:1000; border-left:1px solid rgba(212,168,67,0.15);
    }
    .nav.active { right:0; }
    .nav a { font-size:1.1rem; padding:12px 0; display:block; border-bottom:1px solid rgba(255,255,255,0.06); }
    .menu-toggle { display:flex; }
    .intro-grid { grid-template-columns:1fr; gap:32px; }
    .hero h1 { font-size:1.8rem; }
    .hero-meta { gap:12px; }
    .hero-meta span { padding:6px 12px; font-size:.8rem; }
    .btn-primary, .btn-secondary { width:100%; justify-content:center; padding:12px 28px; font-size:1rem; }
    .section { padding:60px 0; }
    .screenshots-grid { grid-template-columns:1fr; gap:12px; }
    .benefits-grid { grid-template-columns:1fr; }
    .back-to-top { bottom:20px; right:20px; width:42px; height:42px; }
    .guide-content { padding:24px; }
    .guide-images-dual .guide-img-card { max-width:100%; min-width:100%; }
    .feature-card { padding:24px 20px; }
    .features-grid { grid-template-columns:1fr; }
    .cta-section { padding:60px 20px; }
    .btn-cta-ios, .btn-cta-android { width:100%; justify-content:center; }
}
@media (max-width: 480px) {
    .hero { min-height:90vh; }
    .screenshots-grid { grid-template-columns:1fr; gap:10px; }
    .intro-features { grid-template-columns:1fr; }
    .hero-meta { flex-direction:column; align-items:center; }
    .btn-group { flex-direction:column; align-items:center; }
}