/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: #0A0A0F;
    color: #E0E0E0;
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ===== Utility ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: #FFFFFF;
}
.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: #999;
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.text-orange { color: #FF6B00; }
.text-blue { color: #00D4FF; }
.bg-dark { background-color: #0D0D1A; }
.bg-darker { background-color: #0A0A0F; }

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, #FF6B00, #FF8C00);
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(255, 107, 0, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 107, 0, 0.5);
}
.btn-secondary {
    background: transparent;
    color: #00D4FF;
    border: 2px solid #00D4FF;
}
.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}
.btn-sm { padding: 10px 24px; font-size: 14px; }

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    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: #FFFFFF;
}
.nav-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #FF6B00, #FF8C00);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-links a {
    font-size: 15px;
    color: #CCC;
    transition: color 0.3s;
    position: relative;
}
.nav-links a:hover, .nav-links a.active { color: #FF6B00; }
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #FF6B00;
    transition: width 0.3s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: #FFF; transition: 0.3s; }

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}
.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-content { max-width: 560px; }
.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 107, 0, 0.1);
    border: 1px solid rgba(255, 107, 0, 0.3);
    border-radius: 20px;
    font-size: 13px;
    color: #FF6B00;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    color: #FFFFFF;
    margin-bottom: 20px;
}
.hero h1 .highlight {
    background: linear-gradient(135deg, #FF6B00, #FF8C00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero .subtitle {
    font-size: 20px;
    color: #AAA;
    margin-bottom: 16px;
    line-height: 1.6;
}
.hero .description {
    font-size: 16px;
    color: #888;
    margin-bottom: 36px;
    line-height: 1.8;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.hero-phone {
    width: 300px;
    height: 580px;
    background: linear-gradient(145deg, #1A1A2E, #16162A);
    border-radius: 40px;
    border: 2px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}
.hero-phone::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #0A0A0F;
    border-radius: 14px;
}
.phone-screen {
    width: 260px;
    height: 520px;
    background: linear-gradient(180deg, #0D0D1A 0%, #1A1A2E 100%);
    border-radius: 30px;
    padding: 50px 20px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.phone-rocket {
    font-size: 64px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.phone-title {
    font-size: 18px;
    font-weight: 700;
    color: #FFF;
    margin-bottom: 8px;
}
.phone-status {
    font-size: 13px;
    color: #00D4FF;
    margin-bottom: 24px;
}
.phone-stats {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.phone-stat-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    font-size: 13px;
}
.phone-stat-item .label { color: #888; }
.phone-stat-item .value { color: #FFF; font-weight: 600; }

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(13, 13, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 36px 28px;
    transition: all 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 107, 0, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 107, 0, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}
.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #FFF;
    margin-bottom: 12px;
}
.feature-card p {
    font-size: 14px;
    color: #999;
    line-height: 1.7;
}

/* ===== Protocols ===== */
.protocols-section { background: #0D0D1A; }
.protocols-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 60px;
}
.protocol-badge {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 24px;
    font-size: 14px;
    color: #00D4FF;
    font-weight: 500;
    transition: all 0.3s;
}
.protocol-badge:hover {
    background: rgba(0, 212, 255, 0.15);
    transform: translateY(-2px);
}
.devices-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    text-align: center;
}
.device-item {
    padding: 28px 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 14px;
    transition: all 0.3s;
}
.device-item:hover {
    border-color: rgba(255, 107, 0, 0.3);
    transform: translateY(-4px);
}
.device-icon { font-size: 36px; margin-bottom: 12px; }
.device-name { font-size: 14px; color: #FFF; font-weight: 600; margin-bottom: 4px; }
.device-info { font-size: 12px; color: #888; }
.disclaimer {
    margin-top: 40px;
    padding: 16px 24px;
    background: rgba(255, 107, 0, 0.05);
    border: 1px solid rgba(255, 107, 0, 0.15);
    border-radius: 10px;
    font-size: 14px;
    color: #CCC;
    text-align: center;
}

/* ===== Scenarios ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.scenario-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.6), rgba(13, 13, 26, 0.6));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 36px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: all 0.3s;
}
.scenario-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
}
.scenario-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}
.scenario-card h3 { font-size: 18px; color: #FFF; margin-bottom: 8px; font-weight: 700; }
.scenario-card p { font-size: 14px; color: #999; line-height: 1.7; }

/* ===== Privacy ===== */
.privacy-section { background: #0D0D1A; }
.privacy-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.privacy-card {
    text-align: center;
    padding: 36px 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    transition: all 0.3s;
}
.privacy-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
}
.privacy-icon { font-size: 40px; margin-bottom: 16px; }
.privacy-card h3 { font-size: 16px; color: #FFF; margin-bottom: 10px; font-weight: 700; }
.privacy-card p { font-size: 13px; color: #999; line-height: 1.7; }

/* ===== Download / Pricing ===== */
.download-section {
    background: linear-gradient(180deg, #0A0A0F 0%, #0D0D1A 100%);
}
.download-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.download-info h2 { font-size: 36px; color: #FFF; margin-bottom: 20px; font-weight: 700; }
.download-info p { font-size: 16px; color: #999; margin-bottom: 30px; line-height: 1.8; }
.appstore-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: #FFF;
    color: #000;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s;
    margin-bottom: 20px;
}
.appstore-badge:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1); }
.appstore-badge .badge-icon { font-size: 32px; }
.appstore-badge .badge-text { text-align: left; }
.appstore-badge .badge-text small { font-size: 11px; font-weight: 400; display: block; color: #666; }
.appstore-badge .badge-text span { font-size: 18px; }
.app-info {
    margin-top: 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.app-info-item {
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    font-size: 13px;
}
.app-info-item .label { color: #888; }
.app-info-item .value { color: #FFF; font-weight: 500; }
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.pricing-card {
    padding: 28px 24px;
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(13, 13, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    text-align: center;
    transition: all 0.3s;
}
.pricing-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 0, 0.3);
}
.pricing-card.featured {
    border-color: rgba(255, 107, 0, 0.5);
    background: linear-gradient(145deg, rgba(255, 107, 0, 0.08), rgba(13, 13, 26, 0.8));
}
.pricing-card .plan-name { font-size: 14px; color: #999; margin-bottom: 8px; }
.pricing-card .plan-price { font-size: 28px; font-weight: 800; color: #FF6B00; margin-bottom: 4px; }
.pricing-card .plan-unit { font-size: 12px; color: #888; }
.download-warning {
    margin-top: 40px;
    padding: 16px 24px;
    background: rgba(255, 59, 48, 0.05);
    border: 1px solid rgba(255, 59, 48, 0.2);
    border-radius: 10px;
    font-size: 14px;
    color: #FF6B6B;
    text-align: center;
}

/* ===== FAQ ===== */
.faq-section { background: #0D0D1A; }
.faq-category {
    margin-bottom: 48px;
}
.faq-category-title {
    font-size: 22px;
    font-weight: 700;
    color: #FF6B00;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(255, 107, 0, 0.2);
}
.faq-item {
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 24px 28px;
}
.faq-item h3 {
    font-size: 17px;
    color: #FFF;
    margin-bottom: 16px;
    font-weight: 600;
}
.faq-steps { padding-left: 0; }
.faq-step {
    display: flex;
    gap: 14px;
    margin-bottom: 12px;
    align-items: flex-start;
}
.faq-step:last-child { margin-bottom: 0; }
.step-number {
    min-width: 28px;
    height: 28px;
    background: rgba(0, 212, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #00D4FF;
}
.step-content {
    font-size: 14px;
    color: #BBB;
    line-height: 1.8;
    padding-top: 3px;
}

/* ===== Page Header (for inner pages) ===== */
.page-header {
    padding: 160px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, #0D0D1A 0%, #0A0A0F 100%);
    position: relative;
}
.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 107, 0, 0.06) 0%, transparent 70%);
}
.page-header h1 {
    font-size: 44px;
    font-weight: 800;
    color: #FFF;
    margin-bottom: 16px;
    position: relative;
}
.page-header p {
    font-size: 18px;
    color: #999;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

/* ===== Changelog ===== */
.changelog-list { max-width: 800px; margin: 0 auto; }
.changelog-item {
    position: relative;
    padding: 0 0 48px 40px;
    border-left: 2px solid rgba(255, 255, 255, 0.08);
}
.changelog-item:last-child { padding-bottom: 0; }
.changelog-dot {
    position: absolute;
    left: -7px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: #FF6B00;
    border-radius: 50%;
    border: 2px solid #0A0A0F;
}
.changelog-version {
    font-size: 20px;
    font-weight: 700;
    color: #FFF;
    margin-bottom: 4px;
}
.changelog-date { font-size: 13px; color: #888; margin-bottom: 16px; }
.changelog-content { font-size: 14px; color: #BBB; line-height: 1.8; }
.changelog-content ul { padding-left: 20px; list-style: disc; }
.changelog-content li { margin-bottom: 6px; }
.changelog-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 6px;
}
.tag-new { background: rgba(0, 212, 255, 0.15); color: #00D4FF; }
.tag-fix { background: rgba(255, 107, 0, 0.15); color: #FF6B00; }
.tag-improve { background: rgba(76, 217, 100, 0.15); color: #4CD964; }

/* ===== Guide ===== */
.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}
.guide-card {
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(13, 13, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    transition: all 0.3s;
}
.guide-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 107, 0, 0.3);
}
.guide-step-num {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #FF6B00, #FF8C00);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: #FFF;
    margin: 0 auto 20px;
}
.guide-card h3 { font-size: 18px; color: #FFF; margin-bottom: 12px; font-weight: 700; }
.guide-card p { font-size: 14px; color: #999; line-height: 1.7; }

/* ===== About ===== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}
.about-content p {
    font-size: 16px;
    color: #BBB;
    line-height: 2;
    margin-bottom: 24px;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 60px 0;
}
.stat-item {
    text-align: center;
    padding: 28px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 14px;
}
.stat-number { font-size: 36px; font-weight: 800; color: #FF6B00; margin-bottom: 8px; }
.stat-label { font-size: 14px; color: #999; }
.about-timeline { max-width: 700px; margin: 60px auto 0; }
.timeline-item {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    align-items: flex-start;
}
.timeline-year {
    min-width: 60px;
    font-size: 18px;
    font-weight: 800;
    color: #FF6B00;
}
.timeline-desc { font-size: 15px; color: #BBB; line-height: 1.7; }

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.contact-card {
    text-align: center;
    padding: 40px 28px;
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(13, 13, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    transition: all 0.3s;
}
.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 0, 0.3);
}
.contact-icon { font-size: 40px; margin-bottom: 16px; }
.contact-card h3 { font-size: 18px; color: #FFF; margin-bottom: 10px; font-weight: 700; }
.contact-card p { font-size: 14px; color: #999; line-height: 1.7; }
.contact-card a { color: #00D4FF; }
.contact-card a:hover { color: #FF6B00; }

/* ===== Download Page ===== */
.download-page-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}
.download-page-content .big-icon { font-size: 80px; margin-bottom: 30px; }
.download-page-content h2 { font-size: 32px; color: #FFF; margin-bottom: 16px; }
.download-page-content > p { font-size: 16px; color: #999; margin-bottom: 40px; line-height: 1.8; }
.download-platforms {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.platform-card {
    padding: 32px 24px;
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.8), rgba(13, 13, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    transition: all 0.3s;
}
.platform-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 0, 0.3);
}
.platform-icon { font-size: 40px; margin-bottom: 12px; }
.platform-name { font-size: 18px; color: #FFF; font-weight: 700; margin-bottom: 6px; }
.platform-info { font-size: 13px; color: #888; margin-bottom: 16px; }

/* ===== Features Detail Page ===== */
.features-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}
.feature-detail-card {
    padding: 40px;
    background: linear-gradient(145deg, rgba(26, 26, 46, 0.6), rgba(13, 13, 26, 0.6));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    transition: all 0.3s;
}
.feature-detail-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 0, 0.2);
}
.feature-detail-icon { font-size: 36px; margin-bottom: 16px; }
.feature-detail-card h3 { font-size: 20px; color: #FFF; margin-bottom: 12px; font-weight: 700; }
.feature-detail-card p { font-size: 15px; color: #999; line-height: 1.8; }
.feature-detail-card ul { margin-top: 12px; }
.feature-detail-card li {
    font-size: 14px;
    color: #BBB;
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}
.feature-detail-card li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: #FF6B00;
    font-weight: 700;
}

/* ===== Footer ===== */
.footer {
    background: #060609;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: #888; line-height: 1.7; max-width: 300px; }
.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: #FFF;
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: #888;
    padding: 4px 0;
    transition: color 0.3s;
}
.footer-col a:hover { color: #FF6B00; }
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #666;
}
.footer-bottom a { color: #888; margin-left: 16px; }
.footer-bottom a:hover { color: #FF6B00; }

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}
@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ===== Responsive ===== */
@media (max-width: 1199px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .privacy-grid { grid-template-columns: repeat(2, 1fr); }
    .devices-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .nav-links { display: none; }
    .nav-toggle { display: flex; }
    .nav-cta .btn-sm { display: none; }
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero h1 { font-size: 36px; }
    .hero .subtitle { font-size: 17px; }
    .hero-buttons { justify-content: center; }
    .hero-visual { margin-top: 40px; }
    .hero-phone { width: 240px; height: 460px; }
    .phone-screen { width: 210px; height: 410px; padding: 40px 16px 16px; }
    .features-grid { grid-template-columns: 1fr; }
    .scenarios-grid { grid-template-columns: 1fr; }
    .privacy-grid { grid-template-columns: 1fr; }
    .devices-grid { grid-template-columns: repeat(2, 1fr); }
    .download-wrapper { grid-template-columns: 1fr; }
    .pricing-cards { grid-template-columns: 1fr; }
    .guide-grid { grid-template-columns: 1fr; }
    .features-detail-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .download-platforms { grid-template-columns: 1fr; }
    .page-header h1 { font-size: 32px; }
    .app-info { grid-template-columns: 1fr; }
}