:root {
    --primary-color: #5B21B6;
    --primary-light: #7C3AED;
    --secondary-color: #1E1B4B;
    --accent-color: #14B8A6;
    --accent-warm: #F59E0B;
    --text-color: #1F2937;
    --text-muted: #6B7280;
    --light-bg: #F5F3FF;
    --surface: #FFFFFF;
    --border-color: rgba(91, 33, 182, 0.12);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 8px rgba(30, 27, 75, 0.06);
    --shadow-md: 0 8px 24px rgba(30, 27, 75, 0.08);
    --transition-speed: 0.25s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    line-height: 1.65;
    background: #FAFAFC;
    overflow-x: hidden;
}

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

/* —— 导航 —— */
.kl-navbar.z754bfnavbar,
.z754bfnavbar.kl-navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    box-shadow: none;
    padding: 0.65rem 0;
}

.z754bfnavbar-brand img {
    height: 42px;
    max-height: 42px;
    width: auto;
}

.kl-nav-link.z754bfnav-link,
.z754bfnav-link.kl-nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: color var(--transition-speed), background var(--transition-speed);
}

.kl-nav-link:hover,
.kl-nav-link.active {
    color: var(--primary-color) !important;
    background: rgba(91, 33, 182, 0.06);
}

.navbar-toggler {
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.55rem;
}

.navbar-collapse {
    background: var(--surface);
}

@media (max-width: 991px) {
    .navbar-collapse {
        padding: 0.75rem 0;
        margin-top: 0.5rem;
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        max-height: 70vh;
        overflow-y: auto;
    }

    .kl-nav-link {
        display: block;
        width: 100%;
    }
}

/* —— 首页 Hero —— */
.kl-hero.z754bfhero-section {
    background: linear-gradient(160deg, #EDE9FE 0%, #F0FDFA 55%, #FFFBEB 100%);
    color: var(--secondary-color);
    padding: 4rem 0 4.5rem;
    overflow: hidden;
    position: relative;
}

.kl-hero.z754bfhero-section::before {
    display: none;
}

.kl-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
}

.kl-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(91, 33, 182, 0.1);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.kl-hero-title.z754bfhero-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    line-height: 1.25;
}

.kl-hero-lead.z754bfhero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 540px;
}

.kl-hero-actions.z754bfhero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0;
    margin-bottom: 1.25rem;
}

.kl-hero-tags {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.kl-hero-tags li {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.kl-hero-tags i {
    color: var(--accent-color);
}

.kl-hero-visual {
    display: flex;
    justify-content: center;
}

.kl-visual-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    max-width: 360px;
    width: 100%;
}

.kl-hero-img.z754bfhero-image {
    width: 100%;
    max-width: 280px;
    margin: 0 auto 1rem;
    border-radius: var(--radius-md);
    box-shadow: none;
    object-fit: contain;
}

.kl-visual-stat {
    text-align: center;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.kl-visual-stat strong {
    display: block;
    color: var(--primary-color);
    font-size: 1rem;
}

.kl-visual-stat span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.z754bfhero-image-shadow {
    display: none;
}

/* —— 按钮 —— */
.kl-btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.65rem 1.35rem;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.kl-btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(91, 33, 182, 0.35);
}

.kl-btn-outline {
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    font-weight: 600;
    padding: 0.65rem 1.35rem;
    border-radius: var(--radius-sm);
}

.kl-btn-outline:hover {
    background: rgba(91, 33, 182, 0.05);
    border-color: var(--primary-light);
    color: var(--primary-color);
}

.btn {
    white-space: normal;
}

/* —— 通用区块 —— */
.kl-section {
    padding: 4rem 0;
}

.kl-section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.kl-section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.75rem;
}

.kl-section-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— Bento 特点 —— */
.kl-features {
    background: var(--surface);
}

.kl-bento {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.kl-bento-item {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    overflow: hidden;
}

.kl-bento-item:hover {
    border-color: rgba(91, 33, 182, 0.25);
    box-shadow: var(--shadow-sm);
}

.kl-bento-main {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(91, 33, 182, 0.06), rgba(20, 184, 166, 0.08));
}

.kl-bento-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.kl-bento-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.kl-bento-item p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— 统计条 —— */
.kl-stats.z754bfstats-section {
    background: var(--secondary-color);
    color: #fff;
    padding: 2.5rem 0;
}

.kl-stats-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: 0;
    margin-bottom: 1rem;
}

.kl-stat {
    flex: 1 1 140px;
    min-width: 120px;
    text-align: center;
    padding: 0.5rem 1rem;
}

.kl-stat-num.z754bfstat-number {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.kl-stat-label.z754bfstat-label {
    font-size: 0.9rem;
    opacity: 0.85;
}

.kl-stat-divider {
    width: 1px;
    background: rgba(255, 255, 255, 0.2);
    align-self: stretch;
    min-height: 48px;
}

.kl-stats-note {
    font-size: 0.82rem;
    opacity: 0.7;
    padding-top: 0.5rem;
}

/* —— 下载区 —— */
.kl-download.z754bfdownload-section {
    background: var(--light-bg);
    padding: 4rem 0;
}

.kl-download-panel {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    max-width: 900px;
    margin: 0 auto;
}

.kl-dl-col {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.kl-dl-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.kl-dl-head h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 0.2rem;
    color: var(--secondary-color);
}

.kl-dl-head p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.kl-dl-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
}

.kl-dl-win {
    background: linear-gradient(135deg, #2563EB, #1D4ED8);
}

.kl-dl-android {
    background: linear-gradient(135deg, #059669, #047857);
}

.kl-dl-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem;
    flex: 1;
}

.kl-dl-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.kl-dl-list i {
    color: var(--accent-color);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.kl-download-tip {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 1.5rem auto 0;
    max-width: 720px;
}

/* —— 安全区 —— */
.kl-security.z754bfsecurity-section {
    background: var(--surface);
    padding: 4rem 0;
}

.kl-security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.kl-sec-card.z754bfsecurity-card {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.35rem;
    height: 100%;
    box-shadow: none;
    text-align: center;
    transition: border-color var(--transition-speed);
    overflow: hidden;
}

.kl-sec-card:hover {
    border-color: rgba(91, 33, 182, 0.3);
    transform: none;
    box-shadow: var(--shadow-sm);
}

.kl-sec-icon.z754bfsecurity-icon {
    width: 52px;
    height: 52px;
    font-size: 1.2rem;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 14px;
}

.kl-sec-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    text-align: center;
}

.kl-sec-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.55;
}

/* —— 关于 —— */
.kl-about {
    background: linear-gradient(180deg, #F5F3FF 0%, #FAFAFC 100%);
}

.kl-about-box {
    max-width: 800px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 2.25rem;
}

.kl-about-box h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.kl-about-box p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.kl-about-box p:last-child {
    margin-bottom: 0;
}

/* —— FAQ —— */
.kl-faq {
    background: var(--surface);
}

.kl-faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.kl-faq-item.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: none;
    overflow: hidden;
    margin-bottom: 0;
}

.kl-faq-item .card-body {
    padding: 1.25rem 1.35rem;
}

.kl-faq-item h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.kl-faq-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— 文章区 —— */
.kl-articles {
    background: var(--light-bg);
}

.kl-articles-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.kl-article-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: none;
    transition: box-shadow var(--transition-speed);
}

.kl-article-card:hover {
    box-shadow: var(--shadow-sm);
}

.kl-thumb.z754bfthumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

.kl-article-link {
    color: var(--secondary-color);
}

.kl-article-link:hover {
    color: var(--primary-color);
}

.kl-article-card .card-body {
    padding: 0.85rem 1rem;
}

/* —— 页脚 —— */
.kl-footer.z754bffooter {
    background: var(--secondary-color);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.kl-footer .z754bffooter-title,
.kl-footer .footer-title {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.kl-footer-desc {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.6;
}

.kl-footer .z754bffooter-link,
.kl-footer .footer-link {
    color: rgba(255, 255, 255, 0.7);
}

.kl-footer .z754bffooter-link:hover {
    color: var(--accent-color);
}

.kl-footer .z754bffooter-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.6);
}

.kl-footer .z754bffooter-bottom a {
    color: rgba(255, 255, 255, 0.75);
}

.kl-friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.kl-friend-links li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
}

/* —— 列表/内页 —— */
.z754bfpy-5.bg-light {
    background: var(--light-bg) !important;
}

.z754bfpy-5 .card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.z754bfpy-5 .card-body {
    padding: 1.25rem;
}

.z754bfarticle-content {
    overflow-wrap: break-word;
    word-break: break-word;
}

.z754bfarticle-content img {
    max-width: 100%;
    height: auto;
}

.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.pagebar .pagelist li {
    display: inline-flex;
    margin: 0;
}

/* —— 兼容旧类名（弱化） —— */
.z754bffeature-card,
.z754bfdownload-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.z754bfdownload-header h2,
.z754bfsecurity-header h2 {
    color: var(--secondary-color);
    font-weight: 700;
}

/* —— 响应式 —— */
@media (max-width: 991px) {
    .kl-hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .kl-hero-visual {
        order: -1;
    }

    .kl-visual-card {
        max-width: 300px;
    }

    .kl-bento {
        grid-template-columns: 1fr;
    }

    .kl-bento-main {
        grid-column: auto;
    }

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

    .kl-stat-divider {
        display: none;
    }

    .kl-stats-bar {
        gap: 1rem;
    }

    .kl-stat {
        flex: 1 1 45%;
    }
}

@media (max-width: 767px) {
    .kl-section {
        padding: 3rem 0;
    }

    .kl-hero.z754bfhero-section {
        padding: 2.5rem 0 3rem;
    }

    .kl-hero-actions {
        flex-direction: column;
    }

    .kl-hero-actions .btn {
        width: 100%;
    }

    .kl-download-panel {
        grid-template-columns: 1fr;
    }

    .kl-faq-grid {
        grid-template-columns: 1fr;
    }

    .kl-security-grid {
        grid-template-columns: 1fr;
    }

    .kl-about-box {
        padding: 1.35rem 1.25rem;
    }

    .kl-dl-col {
        padding: 1.25rem;
    }

    .z754bfnavbar {
        padding: 0.5rem 0;
    }

    .z754bfnavbar .navbar-collapse {
        margin-top: 0.5rem;
        max-height: 72vh;
        overflow-y: auto;
    }

    .z754bfnavbar .navbar-nav .nav-link {
        padding: 0.55rem 0.5rem !important;
        font-size: 0.95rem;
    }

    #article .kl-thumb,
    #article .z754bfthumb-home {
        height: 96px !important;
    }

    #article h3.h6,
    #article h3.h5 {
        font-size: 0.95rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .listbox .e2 li {
        padding-bottom: 0.75rem !important;
        margin-bottom: 0.75rem !important;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
        margin-bottom: 0.35rem;
        line-height: 1.35;
    }

    .z754bfthumb-list,
    .z754bfthumb-related {
        height: 72px !important;
    }

    .z754bfthumb-side {
        height: 50px !important;
    }

    .z754bfthumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        margin: 0 auto;
    }

    .kl-footer .row > [class*="col-"] {
        text-align: center;
    }

    .kl-friend-links {
        justify-content: center;
    }
}

@media (max-width: 575px) {
    .kl-hero-title {
        font-size: 1.65rem;
    }

    .kl-hero-lead {
        font-size: 0.95rem;
    }

    .kl-hero-tags {
        flex-direction: column;
        gap: 0.5rem;
    }

    .kl-section-head {
        margin-bottom: 1.75rem;
    }

    .kl-stat {
        flex: 1 1 100%;
    }

    #article .kl-thumb,
    #article .z754bfthumb-home {
        height: 88px !important;
    }

    .z754bfthumb-list,
    .z754bfthumb-related {
        height: 64px !important;
    }

    .z754bfthumb-cover {
        height: 150px !important;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }

    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}