/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #f8f4ff;
    min-height: 100vh;
    padding: 20px;
    background-image:
        radial-gradient(ellipse at 80% 10%, rgba(124, 106, 255, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 90%, rgba(167, 139, 250, 0.04) 0%, transparent 50%);
    background-attachment: fixed;
}

/* ===== 主容器 ===== */
.container {
    max-width: 1050px;
    width: 100%;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 40px;
    padding: 44px 50px 32px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 30px 80px rgba(124, 106, 255, 0.08);
}

/* ===== 导航 ===== */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(124, 106, 255, 0.08);
    flex-wrap: wrap;
    gap: 12px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo {
    height: 40px;
    width: auto;
    display: block;
    border-radius: 8px;
}

.brand-text {
    font-size: 20px;
    font-weight: 900;
    color: #2d1b4a;
    letter-spacing: 2px;
}

.brand-text span {
    background: linear-gradient(135deg, #7c6aff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #4a3a6a;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 1px;
    transition: 0.3s ease;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover {
    color: #7c6aff;
    border-bottom-color: #7c6aff;
}

/* ===== 英雄区 ===== */
.hero {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 50px;
    padding: 30px 0 16px;
}

.hero-content {
    flex: 1 1 400px;
}

.hero-badge {
    display: inline-block;
    background: rgba(124, 106, 255, 0.10);
    padding: 4px 18px;
    border-radius: 40px;
    font-size: 11px;
    font-weight: 700;
    color: #6d5ae0;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid rgba(124, 106, 255, 0.08);
    margin-bottom: 14px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.1;
    color: #1a0f2e;
    margin-bottom: 10px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #7c6aff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: 17px;
    color: #4a3a6a;
    margin-bottom: 6px;
    font-weight: 500;
    letter-spacing: 1px;
}

.hero-desc {
    font-size: 15px;
    color: #3d2e55;
    max-width: 440px;
    margin-bottom: 26px;
    line-height: 1.9;
}

.hero-desc strong {
    color: #2d1b4a;
}

/* ===== 下载按钮组 ===== */
.download-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 32px;
    background: linear-gradient(135deg, #7c6aff, #6d5ae0);
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 14px;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 20px rgba(124, 106, 255, 0.2);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 36px rgba(124, 106, 255, 0.3);
}

.btn-download:active {
    transform: scale(0.95);
}

.btn-download .icon {
    font-size: 16px;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    background: rgba(124, 106, 255, 0.06);
    border: 1px solid rgba(124, 106, 255, 0.12);
    border-radius: 12px;
    font-weight: 600;
    font-size: 13px;
    color: #4a3a6a;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-outline:hover {
    background: rgba(124, 106, 255, 0.12);
    color: #6d5ae0;
    border-color: rgba(124, 106, 255, 0.20);
}

.download-tip {
    font-size: 12px;
    color: #5a4a7a;
    margin-top: 4px;
    letter-spacing: 0.5px;
}

.download-tip strong {
    color: #3d2e55;
}

/* ===== 大Logo展示区（完整图片版） ===== */
.hero-visual {
    flex: 1 1 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-display {
    width: 320px;
    height: auto;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(124, 106, 255, 0.04), rgba(167, 139, 250, 0.06));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    border: 2px solid rgba(124, 106, 255, 0.08);
    box-shadow: 0 20px 60px rgba(124, 106, 255, 0.06);
    transition: 0.5s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.logo-display:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 80px rgba(124, 106, 255, 0.12);
    border-color: rgba(124, 106, 255, 0.15);
}

.logo-display .big-icon {
    width: 100%;
    height: auto;
    max-height: 320px;
    object-fit: contain;
    display: block;
    border-radius: 12px;
}

.logo-display .logo-title {
    font-size: 28px;
    font-weight: 900;
    background: linear-gradient(135deg, #7c6aff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 6px;
    margin-top: 14px;
}

.logo-display .logo-sub {
    font-size: 13px;
    color: #5a4a7a;
    letter-spacing: 4px;
    margin-top: 2px;
}

.logo-display::after,
.logo-display::before {
    display: none;
}

/* ===== 统计条 ===== */
.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 36px 56px;
    padding: 22px 0 6px;
    border-top: 1px solid rgba(124, 106, 255, 0.06);
    margin-top: 4px;
}

.stats-item {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.stats-item .number {
    font-size: 24px;
    font-weight: 900;
    color: #1a0f2e;
    letter-spacing: 1px;
}

.stats-item .number span {
    color: #7c6aff;
}

.stats-item .label {
    font-size: 13px;
    color: #5a4a7a;
    font-weight: 500;
}

/* ===== 功能部分 ===== */
#features {
    padding: 36px 0 8px;
}

.section-header {
    text-align: center;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 26px;
    font-weight: 900;
    color: #1a0f2e;
    letter-spacing: 2px;
}

.section-header h2 span {
    background: linear-gradient(135deg, #7c6aff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header p {
    color: #4a3a6a;
    font-size: 14px;
    margin-top: 4px;
    letter-spacing: 1px;
    font-weight: 500;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(124, 106, 255, 0.06);
    border-radius: 16px;
    padding: 22px 16px;
    text-align: center;
    transition: all 0.4s ease;
    cursor: default;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(124, 106, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(124, 106, 255, 0.06);
}

.feature-card .icon {
    font-size: 30px;
    margin-bottom: 8px;
    display: block;
}

.feature-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: #1a0f2e;
    margin-bottom: 4px;
}

.feature-card p {
    font-size: 12px;
    color: #4a3a6a;
    line-height: 1.6;
}

/* ===== 关于 ===== */
.about-section {
    margin-top: 32px;
    padding: 28px 28px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    border: 1px solid rgba(124, 106, 255, 0.06);
}

.about-section h2 {
    font-size: 20px;
    font-weight: 800;
    color: #1a0f2e;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.about-section h2 span {
    color: #7c6aff;
}

.about-section p {
    font-size: 14px;
    color: #3d2e55;
    margin-bottom: 10px;
    line-height: 1.9;
}

.about-section p strong {
    color: #1a0f2e;
}

/* ===== FAQ ===== */
.faq-section {
    margin-top: 28px;
}

.faq-section h2 {
    font-size: 20px;
    font-weight: 800;
    color: #1a0f2e;
    margin-bottom: 14px;
    letter-spacing: 1px;
}

.faq-section h2 span {
    color: #7c6aff;
}

.faq-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.faq-item {
    background: rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(124, 106, 255, 0.06);
    border-radius: 12px;
    padding: 12px 18px;
    transition: 0.3s ease;
    cursor: pointer;
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.7);
    border-color: rgba(124, 106, 255, 0.10);
}

.faq-item h3 {
    font-size: 13px;
    font-weight: 700;
    color: #2d1b4a;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.faq-item h3 .q {
    color: #7c6aff;
}

.faq-item p {
    font-size: 12px;
    color: #4a3a6a;
    padding-left: 22px;
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid rgba(124, 106, 255, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 11px;
    color: #5a4a7a;
    letter-spacing: 0.5px;
}

.footer .brand {
    font-weight: 700;
    color: #3d2e55;
}

.footer .brand span {
    color: #7c6aff;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: #5a4a7a;
    text-decoration: none;
    transition: 0.3s ease;
}

.footer-links a:hover {
    color: #2d1b4a;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .faq-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: 12px;
    }
    .container {
        padding: 24px 18px 20px;
        border-radius: 28px;
    }
    .nav {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        padding-bottom: 16px;
    }
    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .nav-links a {
        font-size: 12px;
    }
    .hero {
        flex-direction: column-reverse;
        text-align: center;
        gap: 24px;
        padding: 20px 0 12px;
    }
    .hero-content {
        text-align: center;
    }
    .hero h1 {
        font-size: 34px;
    }
    .hero-sub {
        font-size: 15px;
    }
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
        font-size: 14px;
    }
    .download-group {
        justify-content: center;
    }
    .btn-download {
        padding: 12px 22px;
        font-size: 13px;
        width: 100%;
        justify-content: center;
    }
    .btn-outline {
        width: 100%;
        justify-content: center;
    }
    .logo-display {
        width: 220px;
        padding: 16px;
    }
    .logo-display .big-icon {
        max-height: 200px;
    }
    .logo-display .logo-title {
        font-size: 22px;
        letter-spacing: 4px;
        margin-top: 12px;
    }
    .logo-display .logo-sub {
        font-size: 11px;
    }
    .stats {
        justify-content: center;
        gap: 20px 32px;
    }
    .stats-item .number {
        font-size: 20px;
    }
    .section-header h2 {
        font-size: 22px;
    }
    .feature-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .feature-card {
        padding: 16px 10px;
    }
    .feature-card .icon {
        font-size: 24px;
    }
    .feature-card h3 {
        font-size: 14px;
    }
    .feature-card p {
        font-size: 11px;
    }
    .about-section {
        padding: 18px 14px;
    }
    .footer {
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }
    .footer-links {
        gap: 14px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .nav-logo {
        height: 34px;
    }
    .brand-text {
        font-size: 17px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 16px 12px 16px;
        border-radius: 20px;
    }
    .hero h1 {
        font-size: 26px;
    }
    .hero-sub {
        font-size: 13px;
    }
    .logo-display {
        width: 250px;
        padding: 10px;
    }
    .logo-display .big-icon {
        max-height: 150px;
    }
    .logo-display .logo-title {
        font-size: 18px;
        letter-spacing: 3px;
        margin-top: 10px;
    }
    .logo-display .logo-sub {
        font-size: 10px;
        letter-spacing: 2px;
    }
    .feature-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .feature-card {
        padding: 12px 8px;
    }
    .feature-card .icon {
        font-size: 20px;
    }
    .feature-card h3 {
        font-size: 12px;
    }
    .feature-card p {
        font-size: 10px;
    }
    .faq-item {
        padding: 10px 12px;
    }
    .faq-item p {
        padding-left: 0;
    }
    .stats-item .number {
        font-size: 17px;
    }
    .stats-item .label {
        font-size: 11px;
    }
    .nav-logo {
        height: 48px;
    }
    .brand-text {
        font-size: 15px;
    }
    .btn-download {
        font-size: 12px;
        padding: 10px 16px;
    }
}