@charset "UTF-8";

:root {
    --primary: #FF9800;
    --primary-light: #FFE0B2;
    --primary-dark: #F57C00;
    --primary-soft: #FFF3E0;
    --accent: #FF7043;
    --accent-light: #FFCC80;
    --bg-warm: #FFF8E1;
    --bg-cream: #FFFDE7;
    --bg-white: #FFFFFF;
    --text-main: #4E342E;
    --text-secondary: #795548;
    --text-muted: #A1887F;
    --text-white: #FFFFFF;
    --border: #FFE0B2;
    --border-light: #FFF3E0;
    --footer-bg: #3E2723;
    --footer-text: #BCAAA4;
    --shadow-sm: 0 2px 8px rgba(255,152,0,0.12);
    --shadow-md: 0 4px 16px rgba(255,152,0,0.16);
    --shadow-lg: 0 8px 32px rgba(255,152,0,0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --max-width: 1200px;
    --nav-height: 72px;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-main);
    background: var(--bg-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

ul {
    list-style: none;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

i[class^="icon-"],
i[class*=" icon-"] {
    display: block;
}

i[class^="icon-"]::before,
i[class*=" icon-"]::before {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    background-color: currentColor;
    mask-size: contain;
    -webkit-mask-size: contain;
    mask-repeat: no-repeat;
    -webkit-mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-position: center;
}

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.icon-check::before { mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNMjIgMTEuMDhWMTJhMTAgMTAgMCAxIDEtNS45My05LjE0Ii8+PHBvbHlsaW5lIHBvaW50cz0iMjIgNCAxMiAxNC4wMSA5IDExLjAxIi8+PC9zdmc+"); -webkit-mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNMjIgMTEuMDhWMTJhMTAgMTAgMCAxIDEtNS45My05LjE0Ii8+PHBvbHlsaW5lIHBvaW50cz0iMjIgNCAxMiAxNC4wMSA5IDExLjAxIi8+PC9zdmc+"); }
.icon-chevron-left::before { mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cG9seWxpbmUgcG9pbnRzPSIxNSAxOCA5IDEyIDE1IDYiLz48L3N2Zz4="); -webkit-mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cG9seWxpbmUgcG9pbnRzPSIxNSAxOCA5IDEyIDE1IDYiLz48L3N2Zz4="); }
.icon-chevron-right::before { mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cG9seWxpbmUgcG9pbnRzPSI5IDE4IDE1IDEyIDkgNiIvPjwvc3ZnPg=="); -webkit-mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cG9seWxpbmUgcG9pbnRzPSI5IDE4IDE1IDEyIDkgNiIvPjwvc3ZnPg=="); }
.icon-comedy::before { mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48Y2lyY2xlIGN4PSIxMiIgY3k9IjEyIiByPSIxMCIvPjxwYXRoIGQ9Ik04IDE0czEuNSAyIDQgMiA0LTIgNC0yIi8+PGxpbmUgeDE9IjkiIHkxPSI5IiB4Mj0iOS4wMSIgeTI9IjkiLz48bGluZSB4MT0iMTUiIHkxPSI5IiB4Mj0iMTUuMDEiIHkyPSI5Ii8+PC9zdmc+"); -webkit-mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48Y2lyY2xlIGN4PSIxMiIgY3k9IjEyIiByPSIxMCIvPjxwYXRoIGQ9Ik04IDE0czEuNSAyIDQgMiA0LTIgNC0yIi8+PGxpbmUgeDE9IjkiIHkxPSI5IiB4Mj0iOS4wMSIgeTI9IjkiLz48bGluZSB4MT0iMTUiIHkxPSI5IiB4Mj0iMTUuMDEiIHkyPSI5Ii8+PC9zdmc+"); }
.icon-data::before { mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNMjIgMTJoLTRsLTMgOUw5IDNsLTMgOUgyIi8+PC9zdmc+"); -webkit-mask-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJjdXJyZW50Q29sb3IiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNMjIgMTJoLTRsLTMgOUw5IDNsLTMgOUgyIi8+PC9zdmc+"); }
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.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 90px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-title-accent {
    color: var(--primary);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 4px rgba(255,152,0,0.08);
    transition: box-shadow 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-height);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    flex-shrink: 0;
}

.header-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.header-logo span {
    color: var(--primary-dark);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu li a {
    display: block;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    border-radius: 20px;
    transition: all 0.25s ease;
}

.nav-menu li a:hover {
    color: var(--primary);
    background: var(--primary-soft);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2.5px;
    background: var(--text-main);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.hero {
    padding: 140px 0 100px;
    background: linear-gradient(160deg, #FFF8E1 0%, #FFE0B2 30%, #FFCC80 70%, #FFB74D 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -80px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: -60px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255,255,255,0.25);
}

.hero-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 720px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: var(--bg-white);
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 20px;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(255,152,0,0.2);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}

.hero-title span {
    color: var(--primary-dark);
}

.hero-desc {
    font-size: 18px;
    color: var(--text-main);
    line-height: 1.8;
    margin-bottom: 36px;
    opacity: 0.85;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 28px;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--text-white);
    box-shadow: 0 4px 16px rgba(255,152,0,0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255,152,0,0.45);
}

.btn-outline {
    background: rgba(255,255,255,0.85);
    color: var(--primary-dark);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-soft);
    transform: translateY(-2px);
}

.btn-download {
    width: 100%;
    justify-content: center;
}

.btn-android {
    background: linear-gradient(135deg, #4CAF50, #388E3C);
    color: var(--text-white);
    box-shadow: 0 4px 16px rgba(76,175,80,0.3);
}

.btn-android:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(76,175,80,0.4);
}

.btn-ios {
    background: linear-gradient(135deg, #424242, #212121);
    color: var(--text-white);
    box-shadow: 0 4px 16px rgba(66,66,66,0.3);
}

.btn-ios:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(66,66,66,0.4);
}

.btn-download img {
    width: 24px;
    height: 24px;
}

.btn-download i {
    width: 24px;
    height: 24px;
}

.features {
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-soft);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-icon i {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.intro {
    background: var(--bg-warm);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-image {
    position: relative;
}

.intro-image-frame {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--bg-cream), var(--primary-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.intro-image-frame::before {
    content: '';
    position: absolute;
    width: 180px;
    height: 180px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    top: 30px;
    right: 30px;
}

.intro-image-frame::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 100px;
    background: rgba(255,152,0,0.3);
    border-radius: 50%;
    bottom: 40px;
    left: 40px;
}

.intro-image-frame i {
    width: 80px;
    height: 80px;
    color: var(--primary);
    position: relative;
    z-index: 1;
}

.intro-dots {
    position: absolute;
    bottom: -16px;
    right: -16px;
    display: grid;
    grid-template-columns: repeat(4, 10px);
    gap: 6px;
}

.intro-dots span {
    width: 10px;
    height: 10px;
    background: var(--primary-light);
    border-radius: 50%;
}

.intro-dots span:nth-child(odd) {
    background: var(--primary);
}

.intro-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.4;
}

.intro-content .lead {
    font-size: 17px;
    color: var(--text-main);
    line-height: 1.8;
    margin-bottom: 24px;
    opacity: 0.75;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.intro-stat {
    text-align: center;
    padding: 20px 12px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.intro-stat-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    display: block;
    margin-bottom: 4px;
}

.intro-stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

.download {
    background: linear-gradient(160deg, #FFB74D 0%, #FF9800 50%, #F57C00 100%);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.download::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -30px;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
}

.download .section-header {
    position: relative;
    z-index: 1;
}

.download .section-title {
    color: var(--text-white);
}

.download .section-subtitle {
    color: rgba(255,255,255,0.85);
}

.download .section-title-accent {
    color: #FFE0B2;
}

.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.download-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.download-card:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-4px);
}

.download-card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
}

.download-card-icon img {
    width: 100%;
    height: 100%;
}

.download-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 8px;
}

.download-card p {
    font-size: 14px;
    color: rgba(255,255,255,0.75);
    margin-bottom: 24px;
}

.download-card .btn {
    width: 100%;
    justify-content: center;
}

.categories {
    background: var(--bg-warm);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    color: var(--primary);
    transition: all 0.3s ease;
}

.category-card:hover .category-icon {
    background: var(--primary);
    color: var(--bg-white);
}

.category-icon i {
    width: 28px;
    height: 28px;
}

.category-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.category-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: 16px;
}

.category-tags span {
    font-size: 12px;
    padding: 4px 12px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    border-radius: 12px;
    font-weight: 500;
}

.data-section {
    background: var(--bg-white);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.data-card {
    text-align: center;
    padding: 36px 20px;
    background: var(--bg-cream);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.data-card:hover {
    background: var(--primary-soft);
    border-color: var(--primary-light);
}

.data-card .data-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.data-card .data-icon i {
    width: 36px;
    height: 36px;
}

.data-card .data-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    display: block;
    margin-bottom: 4px;
    line-height: 1.1;
}

.data-card .data-label {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
}

.advantages {
    background: var(--bg-cream);
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--bg-white);
    padding: 28px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.advantage-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--primary-soft);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.advantage-icon i {
    width: 22px;
    height: 22px;
}

.advantage-text h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
}

.advantage-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq {
    background: var(--bg-white);
}

.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-cream);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    text-align: left;
    -webkit-tap-highlight-color: transparent;
}

.faq-question i {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px 0 30px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .header-logo {
    margin-bottom: 16px;
}

.footer-brand .header-logo span {
    color: #FFB74D;
    font-weight: 700;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--footer-text);
}

.footer-col h4 {
    font-size: 17px;
    font-weight: 700;
    color: #FFB74D;
    margin-bottom: 20px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--footer-text);
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: #FFB74D;
}

.footer-bottom {
    border-top: 1px solid rgba(188,170,164,0.2);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(188,170,164,0.6);
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all 0.3s ease;
    z-index: 999;
    -webkit-tap-highlight-color: transparent;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.back-to-top i {
    width: 20px;
    height: 20px;
    transform: rotate(180deg);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 38px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .section-padding {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 15px;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 12px;
        transform: translateX(100%);
        transition: transform 0.35s ease;
        z-index: 999;
        box-shadow: -4px 0 16px rgba(0,0,0,0.08);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu li a {
        font-size: 18px;
        padding: 12px 32px;
    }

    .header nav {
        position: absolute;
        width: 0;
        height: 0;
        overflow: visible;
        pointer-events: none;
    }

    .nav-toggle {
        display: flex;
        margin-left: auto;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-inner {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .intro-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .download-grid {
        grid-template-columns: 1fr;
        max-width: 360px;
    }

    .footer-inner {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    .intro-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .intro-stat-number {
        font-size: 22px;
    }

    .data-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .data-card .data-number {
        font-size: 28px;
    }

    .footer-inner {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}