/* ===== Saylo AI 官网样式表 ===== */
/* ===== Reset & Variables ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-deep: #07071a;
    --bg-dark: #0d0d24;
    --bg-mid: #141432;
    --bg-light: #1e1e45;
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --secondary-light: #a78bfa;
    --accent-orange: #f59e0b;
    --accent-orange-light: #fbbf24;
    --accent-cyan: #06b6d4;
    --accent-cyan-light: #22d3ee;
    --accent-pink: #ec4899;
    --text-primary: #f0f0ff;
    --text-secondary: #a8a8c8;
    --text-muted: #6b6b8d;
    --glass-bg: rgba(20, 20, 50, 0.65);
    --glass-border: rgba(99, 102, 241, 0.2);
    --shadow-primary: 0 0 40px rgba(99, 102, 241, 0.3);
    --shadow-secondary: 0 0 50px rgba(139, 92, 246, 0.3);
    --shadow-orange: 0 0 30px rgba(245, 158, 11, 0.25);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== Background Effects ===== */
.bg-gradient {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -2;
    background:
        radial-gradient(ellipse at 15% 15%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
        radial-gradient(ellipse at 85% 85%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 50%, rgba(245, 158, 11, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-dark) 50%, var(--bg-deep) 100%);
}
.bg-stars {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
    background-image:
        radial-gradient(1px 1px at 20px 30px, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 40px 70px, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.4), transparent);
    background-size: 200px 200px;
    animation: twinkle 8s ease-in-out infinite;
    opacity: 0.6;
}
@keyframes twinkle {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* ===== Header / Navigation ===== */
header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 0.9rem 2rem;
    background: rgba(7, 7, 26, 0.85);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition);
}
header.scrolled {
    padding: 0.65rem 2rem;
    background: rgba(7, 7, 26, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}
nav {
    max-width: 1400px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
    display: flex; align-items: center; gap: 0.7rem;
    text-decoration: none; color: var(--text-primary);
}
.brand-logo {
    width: 42px; height: 42px; border-radius: 50%;
    overflow: hidden; border: 2px solid var(--primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
    transition: var(--transition);
}
.brand-logo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.brand:hover .brand-logo {
    border-color: var(--accent-orange);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
    transform: rotate(5deg) scale(1.05);
}
.brand-text {
    font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
    font-size: 1.4rem; font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 50%, var(--accent-orange-light) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: 1px;
}
.nav-center {
    display: flex; align-items: center; gap: 2rem;
    list-style: none;
}
.nav-center a {
    color: var(--text-secondary); text-decoration: none;
    font-weight: 500; font-size: 0.92rem;
    position: relative; transition: var(--transition);
    padding: 0.4rem 0;
}
.nav-center a::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent-orange));
    transition: width 0.3s ease;
}
.nav-center a:hover { color: var(--primary-light); }
.nav-center a:hover::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 0.8rem; }
.btn-download-nav {
    display: inline-flex; align-items: center; gap: 0.45rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff; padding: 0.6rem 1.4rem; border-radius: 50px;
    font-weight: 700; font-size: 0.9rem; text-decoration: none;
    border: none; cursor: pointer; transition: var(--transition);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 3px 12px rgba(99,102,241,0.4);
}
.btn-download-nav:hover {
    transform: translateY(-2px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 5px 20px rgba(99,102,241,0.55);
}
.mobile-menu-btn {
    display: none; background: none; border: none;
    color: var(--primary-light); font-size: 1.6rem; cursor: pointer;
}

/* ===== Hero Section ===== */
#hero {
    min-height: 100vh; display: flex; align-items: center;
    padding: 7rem 2rem 3rem; position: relative; overflow: hidden;
}
.hero-container {
    max-width: 1400px; margin: 0 auto; width: 100%;
    display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center;
}
.hero-content { animation: fadeInUp 1s ease-out; }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    padding: 0.45rem 1.1rem; border-radius: 50px;
    font-size: 0.82rem; color: var(--accent-cyan-light);
    margin-bottom: 1.3rem; backdrop-filter: blur(10px);
}
.hero-badge .dot {
    width: 8px; height: 8px; background: var(--accent-orange);
    border-radius: 50%; animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 10px var(--accent-orange); }
    50% { opacity: 0.5; }
}
.hero-title {
    font-size: clamp(2.3rem, 4.8vw, 3.8rem); font-weight: 900;
    line-height: 1.18; margin-bottom: 1.2rem;
}
.hero-title .gradient {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 40%, var(--accent-orange-light) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    animation: shine 4s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }
.hero-desc {
    font-size: 1.08rem; color: var(--text-secondary);
    margin-bottom: 2rem; line-height: 1.9; max-width: 520px;
}
.hero-desc strong { color: var(--accent-orange-light); font-weight: 700; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.95rem 2.1rem; border-radius: 50px;
    font-size: 1rem; font-weight: 700; text-decoration: none;
    cursor: pointer; border: none; transition: var(--transition);
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 4px 20px rgba(99,102,241,0.45);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 6px 30px rgba(99,102,241,0.6);
}
.btn-secondary {
    background: var(--glass-bg); color: var(--text-primary);
    border: 1px solid var(--accent-cyan); backdrop-filter: blur(10px);
}
.btn-secondary:hover {
    background: rgba(6, 182, 212, 0.1); transform: translateY(-3px);
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
}
.hero-stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.stat-item .num {
    font-family: 'Orbitron', sans-serif; font-size: 1.9rem; font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-orange-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-item .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.2rem; }

/* Hero Phone Showcase */
.hero-showcase {
    position: relative; display: flex; justify-content: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}
@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}
.phone-mockup {
    width: 280px; height: 560px;
    background: var(--bg-mid); border-radius: 40px;
    border: 3px solid var(--glass-border);
    box-shadow: var(--shadow-secondary), 0 20px 60px rgba(0,0,0,0.5);
    overflow: hidden; position: relative; padding: 14px;
}
.phone-screen {
    width: 100%; height: 100%; border-radius: 28px;
    overflow: hidden; background: var(--bg-deep);
}
.phone-screen img { width: 100%; height: 100%; object-fit: cover; display: block; }
.phone-notch {
    position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
    width: 110px; height: 26px; background: var(--bg-deep);
    border-radius: 0 0 18px 18px; z-index: 2;
}
.phone-glow {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 350px; height: 350px;
    background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, transparent 70%);
    z-index: -1; filter: blur(40px);
}
.floating-badge {
    position: absolute; background: var(--glass-bg);
    border: 1px solid var(--glass-border); backdrop-filter: blur(10px);
    border-radius: 12px; padding: 0.7rem 1rem;
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.82rem; font-weight: 600;
    animation: float 3s ease-in-out infinite;
}
.floating-badge.badge-1 {
    top: 15%; left: -20px;
    color: var(--accent-orange-light);
    animation-delay: 0s;
}
.floating-badge.badge-2 {
    bottom: 20%; right: -20px;
    color: var(--accent-cyan-light);
    animation-delay: 1.5s;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ===== Section Common ===== */
section { padding: 5.5rem 2rem; position: relative; }
.section-container { max-width: 1400px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-tag {
    display: inline-block; padding: 0.4rem 1.2rem;
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: 50px; font-size: 0.75rem; color: var(--accent-cyan-light);
    margin-bottom: 1rem; letter-spacing: 2px; text-transform: uppercase;
    font-family: 'Orbitron', sans-serif;
}
.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 900;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 60%, var(--accent-orange-light) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-desc {
    font-size: 1rem; color: var(--text-secondary);
    max-width: 650px; margin: 0 auto; line-height: 1.8;
}

/* ===== Features Section ===== */
#features {
    background: linear-gradient(180deg, transparent 0%, rgba(20,20,50,0.4) 50%, transparent 100%);
}
.features-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-md); padding: 2rem 1.8rem;
    transition: var(--transition); position: relative; overflow: hidden;
    backdrop-filter: blur(10px);
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent-orange));
    transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
    width: 56px; height: 56px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; margin-bottom: 1.2rem;
    background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(139,92,246,0.2));
    border: 1px solid var(--glass-border);
}
.feature-card:nth-child(2) .feature-icon {
    background: linear-gradient(135deg, rgba(245,158,11,0.2), rgba(236,72,153,0.2));
}
.feature-card:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, rgba(6,182,212,0.2), rgba(99,102,241,0.2));
}
.feature-card:nth-child(4) .feature-icon {
    background: linear-gradient(135deg, rgba(139,92,246,0.2), rgba(236,72,153,0.2));
}
.feature-card:nth-child(5) .feature-icon {
    background: linear-gradient(135deg, rgba(245,158,11,0.2), rgba(6,182,212,0.2));
}
.feature-card:nth-child(6) .feature-icon {
    background: linear-gradient(135deg, rgba(236,72,153,0.2), rgba(99,102,241,0.2));
}
.feature-title {
    font-size: 1.15rem; font-weight: 700; margin-bottom: 0.6rem;
    color: var(--text-primary);
}
.feature-desc {
    font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7;
}

/* ===== Screenshots / Showcase Section ===== */
#showcase { position: relative; }
.showcase-tabs {
    display: flex; justify-content: center; gap: 0.8rem;
    margin-bottom: 2.5rem; flex-wrap: wrap;
}
.showcase-tab {
    padding: 0.6rem 1.4rem; border-radius: 50px;
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    color: var(--text-secondary); font-size: 0.9rem; font-weight: 500;
    cursor: pointer; transition: var(--transition);
}
.showcase-tab.active, .showcase-tab:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff; border-color: transparent;
}
.showcase-display {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem; max-width: 1100px; margin: 0 auto;
}
.screenshot-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-md); overflow: hidden;
    transition: var(--transition); cursor: pointer;
}
.screenshot-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent-orange);
    box-shadow: var(--shadow-orange);
}
.screenshot-img {
    aspect-ratio: 9/16; overflow: hidden;
    background: var(--bg-deep);
}
.screenshot-img img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
}
.screenshot-card:hover .screenshot-img img { transform: scale(1.05); }
.screenshot-label {
    padding: 1rem 1.2rem; text-align: center;
}
.screenshot-label h4 {
    font-size: 1rem; font-weight: 700; margin-bottom: 0.3rem;
    color: var(--text-primary);
}
.screenshot-label p {
    font-size: 0.82rem; color: var(--text-muted);
}

/* ===== Characters Section ===== */
#characters {
    background: linear-gradient(180deg, transparent 0%, rgba(20,20,50,0.4) 50%, transparent 100%);
}
.characters-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}
.character-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-md); overflow: hidden;
    transition: var(--transition); cursor: pointer;
    position: relative;
}
.character-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-pink);
    box-shadow: 0 0 35px rgba(236, 72, 153, 0.3);
}
.character-cover {
    position: relative; aspect-ratio: 3/4; overflow: hidden;
}
.character-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
}
.character-card:hover .character-cover img { transform: scale(1.08); }
.character-cover::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(7,7,26,0.95) 100%);
}
.character-tag {
    position: absolute; top: 10px; left: 10px; z-index: 2;
    background: var(--accent-pink); color: #fff;
    padding: 0.25rem 0.7rem; border-radius: 6px;
    font-size: 0.7rem; font-weight: 700;
}
.character-info {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 1.2rem; z-index: 2;
}
.character-name {
    font-size: 1.1rem; font-weight: 700; margin-bottom: 0.3rem;
    color: var(--text-primary);
}
.character-meta {
    font-size: 0.78rem; color: var(--text-secondary);
    display: flex; gap: 0.8rem;
}
.character-meta span { display: flex; align-items: center; gap: 0.3rem; }

/* ===== Reviews Section ===== */
#reviews { position: relative; }
.reviews-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.review-card {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: var(--radius-md); padding: 1.8rem;
    transition: var(--transition); backdrop-filter: blur(10px);
}
.review-card:hover {
    border-color: var(--primary); transform: translateY(-4px);
    box-shadow: var(--shadow-primary);
}
.review-stars {
    color: var(--accent-orange); font-size: 0.9rem;
    margin-bottom: 0.8rem; letter-spacing: 2px;
}
.review-text {
    color: var(--text-secondary); font-size: 0.92rem;
    line-height: 1.8; margin-bottom: 1.2rem; font-style: italic;
}
.review-text::before {
    content: '\201C'; color: var(--primary-light);
    font-size: 1.5rem; font-family: Georgia, serif;
}
.review-text::after {
    content: '\201D'; color: var(--primary-light);
    font-size: 1.5rem; font-family: Georgia, serif;
}
.review-author { display: flex; align-items: center; gap: 0.8rem; }
.review-avatar {
    width: 42px; height: 42px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; font-weight: 700; color: #fff;
}
.review-name { font-size: 0.9rem; color: var(--text-primary); font-weight: 600; }
.review-role { font-size: 0.75rem; color: var(--text-muted); }

/* ===== CTA / Download Section ===== */
#cta {
    background: linear-gradient(180deg, transparent 0%, rgba(20,20,50,0.5) 50%, transparent 100%);
}
.cta-container {
    max-width: 900px; margin: 0 auto; text-align: center;
    background: linear-gradient(135deg, rgba(99,102,241,0.12) 0%, rgba(139,92,246,0.12) 50%, rgba(245,158,11,0.08) 100%);
    border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
    padding: 3.5rem 2.5rem; position: relative; overflow: hidden;
}
.cta-container::before {
    content: ''; position: absolute; top: -50%; right: -20%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    filter: blur(40px);
}
.cta-container::after {
    content: ''; position: absolute; bottom: -50%; left: -20%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, transparent 70%);
    filter: blur(40px);
}
.cta-icon { font-size: 3.5rem; margin-bottom: 1rem; position: relative; z-index: 1; }
.cta-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem); font-weight: 900;
    margin-bottom: 1rem; position: relative; z-index: 1;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-light), var(--accent-orange-light));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cta-desc {
    font-size: 1.05rem; color: var(--text-secondary);
    margin-bottom: 2rem; max-width: 550px; margin-left: auto; margin-right: auto;
    position: relative; z-index: 1; line-height: 1.8;
}
.cta-buttons {
    display: flex; gap: 1rem; justify-content: center;
    flex-wrap: wrap; position: relative; z-index: 1;
}
.cta-note {
    margin-top: 1.5rem; font-size: 0.82rem; color: var(--text-muted);
    position: relative; z-index: 1;
}

/* ===== Footer ===== */
footer {
    background: rgba(7, 7, 26, 0.92);
    border-top: 1px solid var(--glass-border);
    padding: 3.5rem 2rem 1.8rem;
}
.footer-container { max-width: 1400px; margin: 0 auto; }
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 2.5rem; margin-bottom: 2.5rem;
}
.footer-brand .brand { margin-bottom: 1.2rem; }
.footer-brand p {
    color: var(--text-muted); font-size: 0.88rem;
    line-height: 1.8; max-width: 300px; margin-bottom: 1rem;
}
.footer-social { display: flex; gap: 0.8rem; }
.social-icon {
    width: 38px; height: 38px; border-radius: 50%;
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; color: var(--text-secondary);
    text-decoration: none; transition: var(--transition);
}
.social-icon:hover {
    background: var(--primary); color: #fff;
    border-color: var(--primary); transform: translateY(-3px);
    box-shadow: 0 0 15px rgba(99,102,241,0.4);
}
.footer-col h4 {
    font-size: 0.95rem; font-weight: 700; color: var(--primary-light);
    margin-bottom: 1.2rem; padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--glass-border);
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.65rem; }
.footer-col a {
    color: var(--text-muted); text-decoration: none;
    font-size: 0.88rem; transition: var(--transition);
}
.footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
    border-top: 1px solid var(--glass-border); padding-top: 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 1rem;
}
.footer-copyright { color: var(--text-muted); font-size: 0.82rem; }
.footer-copyright a { color: var(--primary-light); text-decoration: none; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
    color: var(--text-muted); text-decoration: none;
    font-size: 0.82rem; transition: var(--transition);
}
.footer-links a:hover { color: var(--primary-light); }

/* ===== Scroll Reveal Animation ===== */
.reveal {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.active { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
    .footer-grid .footer-col:last-child { display: none; }
}
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; text-align: center; gap: 2.5rem; }
    .hero-content { order: 2; }
    .hero-showcase { order: 1; }
    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .nav-center { display: none; }
    .floating-badge { display: none; }
}
@media (max-width: 768px) {
    header { padding: 0.7rem 1rem; }
    header.scrolled { padding: 0.55rem 1rem; }
    .mobile-menu-btn { display: block; }
    .nav-center {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: rgba(7,7,26,0.98); backdrop-filter: blur(20px);
        flex-direction: column; padding: 1.5rem; gap: 1.2rem;
        border-bottom: 1px solid var(--glass-border);
    }
    .nav-center.active { display: flex; }
    section { padding: 4rem 1rem; }
    #hero { padding: 6rem 1rem 2.5rem; }
    .phone-mockup { width: 240px; height: 480px; }
    .features-grid { grid-template-columns: 1fr; }
    .showcase-display { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .characters-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .cta-container { padding: 2.5rem 1.5rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .btn-download-nav { padding: 0.5rem 1rem; font-size: 0.82rem; }
    .brand-text { font-size: 1.2rem; }
}
@media (max-width: 480px) {
    .hero-buttons { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .hero-stats { gap: 1.5rem; }
    .showcase-display { grid-template-columns: 1fr; }
    .characters-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .cta-buttons { flex-direction: column; }
    .cta-buttons .btn { width: 100%; }
}
/* ===== Hero Carousel 轮播图样式 ===== */
.carousel {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 28px;
}
.carousel-track {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.carousel-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.carousel-slide.active {
    opacity: 1;
}
.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 轮播切换按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(7, 7, 26, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.4);
    color: #fff;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s ease;
    opacity: 0;
}
.phone-mockup:hover .carousel-btn {
    opacity: 1;
}
.carousel-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
    transform: translateY(-50%) scale(1.1);
}
.carousel-prev {
    left: 8px;
}
.carousel-next {
    right: 8px;
}

/* 轮播指示器 */
.carousel-dots {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 10;
}
.carousel-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}
.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}
.carousel-dot.active {
    background: var(--primary-light);
    width: 22px;
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
}

/* 移动端显示按钮 */
@media (max-width: 768px) {
    .carousel-btn {
        opacity: 1;
        width: 30px;
        height: 30px;
        font-size: 0.8rem;
    }
    .carousel-dots {
        bottom: 14px;
    }
    .carousel-dot {
        width: 6px;
        height: 6px;
    }
    .carousel-dot.active {
        width: 18px;
    }
}