/* Btok 官网主题 — 深青绿 + 琥珀强调色 */
:root {
    --primary: #1a6b5c;
    --primary-dark: #0f4a42;
    --primary-light: #e8f4f1;
    --accent: #d4923a;
    --accent-light: #fdf3e3;
    --text: #1e2a28;
    --text-muted: #5a6b68;
    --surface: #f6f9f8;
    --white: #ffffff;
    --border: rgba(26, 107, 92, 0.12);
    --shadow: 0 4px 24px rgba(15, 74, 66, 0.08);
    --shadow-lg: 0 12px 40px rgba(15, 74, 66, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.25s ease;
    --nav-h: 72px;
}

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

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--text);
    line-height: 1.65;
    background: var(--white);
    margin: 0;
    overflow-x: hidden;
}

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

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

/* —— 导航 —— */
.z9aa49navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.z9aa49navbar-brand img {
    height: 42px;
    width: auto;
}

.z9aa49nav-link {
    color: var(--text) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: color var(--transition), background var(--transition);
}

.z9aa49nav-link:hover {
    color: var(--primary) !important;
    background: var(--primary-light);
}

.z9aa49navbar .navbar-toggler {
    border: 1px solid var(--border);
    padding: 0.4rem 0.55rem;
}

.z9aa49navbar .navbar-collapse {
    background: var(--white);
}

@media (max-width: 991px) {
    .z9aa49navbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.5rem 0;
        max-height: 70vh;
        overflow-y: auto;
        border-top: 1px solid var(--border);
    }

    .z9aa49nav-link {
        padding: 0.5rem 0.25rem !important;
    }
}

/* —— Hero —— */
.z9aa49hero-section {
    background: linear-gradient(160deg, var(--primary-dark) 0%, var(--primary) 55%, #2a8a78 100%);
    color: var(--white);
    padding: clamp(3rem, 8vw, 5.5rem) 0;
    position: relative;
    overflow: hidden;
}

.z9aa49hero-section::after {
    content: "";
    position: absolute;
    right: -10%;
    top: -20%;
    width: 50%;
    height: 140%;
    background: radial-gradient(ellipse, rgba(255,255,255,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.z9aa49hero-content {
    position: relative;
    z-index: 1;
}

.z9aa49hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.z9aa49hero-title {
    font-size: clamp(1.75rem, 4.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.z9aa49hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.92;
    margin-bottom: 1.5rem;
    max-width: 540px;
}

.z9aa49hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z9aa49hero-buttons .btn {
    padding: 0.7rem 1.35rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    transition: transform var(--transition), box-shadow var(--transition);
}

.z9aa49hero-buttons .btn-light {
    background: var(--white);
    color: var(--primary-dark);
}

.z9aa49hero-buttons .btn-accent {
    background: var(--accent);
    color: var(--white);
}

.z9aa49hero-buttons .btn-outline-light {
    background: transparent;
    border: 2px solid rgba(255,255,255,0.6);
    color: var(--white);
}

.z9aa49hero-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.z9aa49hero-image-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.z9aa49hero-image {
    max-width: min(320px, 90%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.z9aa49hero-image-shadow {
    display: none;
}

/* —— 通用区块 —— */
.z9aa49section {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.z9aa49section-alt {
    background: var(--surface);
}

.z9aa49section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.z9aa49section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.z9aa49section-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— 产品亮点 —— */
.z9aa49bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.z9aa49bento-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: border-color var(--transition), box-shadow var(--transition);
    overflow: hidden;
    min-height: 0;
}

.z9aa49bento-card:hover {
    border-color: rgba(26, 107, 92, 0.3);
    box-shadow: var(--shadow-lg);
}

.z9aa49bento-card.span-2 {
    grid-column: span 2;
}

.z9aa49bento-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.z9aa49bento-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z9aa49bento-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin: 0;
    line-height: 1.6;
}

/* —— 数据统计 —— */
.z9aa49stats-section {
    background: var(--primary-dark);
    color: var(--white);
    padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.z9aa49stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: center;
}

.z9aa49stat-number {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
}

.z9aa49stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-top: 0.25rem;
}

/* —— 知识介绍 —— */
.z9aa49knowledge-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.z9aa49knowledge-main {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow);
}

.z9aa49knowledge-main h3 {
    font-size: 1.15rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.z9aa49knowledge-main p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.z9aa49knowledge-main p:last-child {
    margin-bottom: 0;
}

.z9aa49knowledge-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.z9aa49knowledge-list li {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.15rem;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.z9aa49knowledge-list li i {
    color: var(--accent);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z9aa49knowledge-list strong {
    display: block;
    color: var(--primary-dark);
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.z9aa49knowledge-list span {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* —— 下载区 —— */
.z9aa49download-section {
    background: linear-gradient(180deg, var(--accent-light) 0%, var(--surface) 100%);
}

.z9aa49download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.z9aa49download-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.z9aa49download-card-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.z9aa49platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    color: var(--white);
    flex-shrink: 0;
}

.z9aa49ios-icon {
    background: linear-gradient(135deg, #555, #333);
}

.z9aa49android-icon {
    background: linear-gradient(135deg, #3ddc84, #2a9d5c);
}

.z9aa49win-icon {
    background: linear-gradient(135deg, #0078d4, #005a9e);
}

.z9aa49download-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0 0 0.2rem;
    color: var(--primary-dark);
}

.z9aa49download-card .platform-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.z9aa49download-info {
    flex: 1;
    margin-bottom: 1.25rem;
}

.z9aa49info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.z9aa49info-item i {
    color: var(--primary);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.z9aa49download-action .btn {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 10px;
    font-weight: 600;
    background: var(--primary);
    border: none;
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: background var(--transition);
}

.z9aa49download-action .btn:hover {
    background: var(--primary-dark);
    color: var(--white);
}

/* —— 安全 —— */
.z9aa49security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.z9aa49security-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.35rem;
    text-align: center;
    height: 100%;
    overflow: hidden;
}

.z9aa49security-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 0 auto 0.85rem;
}

.z9aa49security-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z9aa49security-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* —— FAQ —— */
.z9aa49faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.z9aa49faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.35rem;
    overflow: hidden;
}

.z9aa49faq-item h3 {
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z9aa49faq-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— 文章区 —— */
#article .card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

#article .card-img-top,
.z9aa49thumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

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

#article h3.h5 {
    font-size: 0.92rem;
    line-height: 1.4;
}

#article .btn-outline-primary {
    border-color: var(--primary);
    color: var(--primary);
}

#article .btn-outline-primary:hover {
    background: var(--primary);
    color: var(--white);
}

/* —— 页脚 —— */
.z9aa49footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    padding: clamp(2.5rem, 5vw, 3.5rem) 0 1.5rem;
}

.z9aa49footer-title {
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.z9aa49footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z9aa49footer-links li {
    margin-bottom: 0.5rem;
}

.z9aa49footer-link {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.z9aa49footer-link:hover {
    color: var(--accent);
}

.z9aa49friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z9aa49friend-links a {
    color: rgba(255,255,255,0.65);
    font-size: 0.88rem;
}

.z9aa49friend-links a:hover {
    color: var(--accent);
}

.z9aa49footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 1.25rem;
    margin-top: 2rem;
    text-align: center;
    font-size: 0.88rem;
    color: rgba(255,255,255,0.6);
}

.z9aa49footer-bottom a {
    color: rgba(255,255,255,0.75);
}

.z9aa49footer-bottom a:hover {
    color: var(--accent);
}

/* —— 列表/内页 —— */
.z9aa49page-main .card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.z9aa49page-main .card-body {
    padding: 1.25rem 1.5rem;
}

.z9aa49article-content {
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z9aa49article-content img {
    max-width: 100%;
    height: auto;
}

.z9aa49thumb-list,
.z9aa49thumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: 8px;
}

.z9aa49thumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    border-radius: 6px;
}

.z9aa49side-thumb-link {
    width: 72px;
    flex: 0 0 72px;
}

.z9aa49thumb-cover {
    max-width: 100%;
    width: 100%;
    height: auto;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--radius);
}

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

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

.z9aa49meta-tags .z9aa49tagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--primary-light);
    border-radius: 6px;
    font-size: 0.85rem;
}

/* Bootstrap 按钮覆盖 */
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* —— 响应式 —— */
@media (max-width: 1199px) {
    .z9aa49bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z9aa49bento-card.span-2 {
        grid-column: span 2;
    }

    .z9aa49download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    .z9aa49bento-grid {
        grid-template-columns: 1fr;
    }

    .z9aa49bento-card.span-2 {
        grid-column: span 1;
    }

    .z9aa49stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .z9aa49knowledge-wrap {
        grid-template-columns: 1fr;
    }

    .z9aa49download-grid {
        grid-template-columns: 1fr;
    }

    .z9aa49security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z9aa49hero-image-container {
        margin-top: 1.5rem;
    }
}

@media (max-width: 767px) {
    .z9aa49hero-buttons {
        flex-direction: column;
    }

    .z9aa49hero-buttons .btn {
        width: 100%;
    }

    .z9aa49faq-grid {
        grid-template-columns: 1fr;
    }

    .z9aa49security-grid {
        grid-template-columns: 1fr;
    }

    .z9aa49stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z9aa49download-card-head {
        flex-wrap: wrap;
    }

    .z9aa49download-action .btn {
        white-space: normal;
    }

    #article .row-cols-lg-5 {
        --bs-columns: 2;
    }

    #article .z9aa49thumb-home {
        height: 96px;
    }

    .z9aa49thumb-list,
    .z9aa49thumb-related {
        height: 72px;
    }

    .z9aa49thumb-side {
        height: 50px;
    }

    .z9aa49thumb-cover {
        max-height: 200px;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
    }

    .z9aa49footer .row > div {
        text-align: center;
        margin-bottom: 1.5rem;
    }

    .z9aa49friend-links {
        justify-content: center;
    }
}

@media (max-width: 575px) {
    .z9aa49stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .z9aa49stat-number {
        font-size: 1.5rem;
    }

    #article .z9aa49thumb-home {
        height: 88px;
    }

    .z9aa49thumb-list,
    .z9aa49thumb-related {
        height: 64px;
    }

    .z9aa49knowledge-main,
    .z9aa49bento-card,
    .z9aa49download-card {
        padding: 1.15rem;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
        font-size: 0.9rem;
    }
}