:root {
    --primary: #5b21b6;
    --primary-light: #7c3aed;
    --primary-dark: #4c1d95;
    --accent: #14b8a6;
    --accent-soft: rgba(20, 184, 166, 0.12);
    --surface: #faf8ff;
    --surface-alt: #f1f5f9;
    --text: #1e1b2e;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --radius: 12px;
    --radius-lg: 18px;
    --shadow: 0 4px 24px rgba(91, 33, 182, 0.08);
    --shadow-hover: 0 8px 32px rgba(91, 33, 182, 0.14);
    --nav-height: 72px;
    --transition: 0.25s 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", "Segoe UI", sans-serif;
    color: var(--text);
    line-height: 1.65;
    background: var(--surface);
    overflow-x: hidden;
}

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

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

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

/* 导航 */
.zdcb35navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0.65rem 0;
}

.zdcb35navbar-sticky {
    position: sticky;
    top: 0;
    z-index: 1030;
}

.zdcb35navbar-brand img {
    height: 42px;
    width: auto;
}

.zdcb35nav-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);
}

.zdcb35nav-link:hover {
    color: var(--primary) !important;
    background: var(--accent-soft);
}

.zdcb35navbar .navbar-collapse {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

/* 按钮 */
.zdcb35btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    white-space: normal;
    text-align: center;
}

.zdcb35btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff !important;
    border-color: transparent;
}

.zdcb35btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: #fff !important;
}

.zdcb35btn-outline {
    background: #fff;
    color: var(--primary) !important;
    border-color: var(--primary-light);
}

.zdcb35btn-outline:hover {
    background: var(--accent-soft);
    color: var(--primary-dark) !important;
}

.zdcb35btn-ghost {
    background: rgba(255, 255, 255, 0.15);
    color: #fff !important;
    border-color: rgba(255, 255, 255, 0.4);
}

.zdcb35btn-ghost:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #fff !important;
}

/* 区块通用 */
.zdcb35section {
    padding: 4.5rem 0;
}

.zdcb35section-head {
    margin-bottom: 2.5rem;
    text-align: center;
}

.zdcb35section-head-left {
    text-align: left;
    margin-bottom: 0;
}

.zdcb35section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.zdcb35section-head p {
    color: var(--text-muted);
    margin: 0;
    max-width: 560px;
}

.zdcb35section-head:not(.zdcb35section-head-left) p {
    margin-left: auto;
    margin-right: auto;
}

/* Hero */
.zdcb35hero-section {
    background: linear-gradient(145deg, var(--primary-dark) 0%, var(--primary) 45%, #6d28d9 100%);
    color: #fff;
    padding: 4rem 0 4.5rem;
    position: relative;
    overflow: hidden;
}

.zdcb35hero-section::after {
    content: "";
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.25) 0%, transparent 70%);
    top: -120px;
    right: -80px;
    pointer-events: none;
}

.zdcb35hero-content {
    position: relative;
    z-index: 1;
}

.zdcb35hero-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    margin-bottom: 1rem;
}

.zdcb35hero-title {
    font-size: clamp(1.85rem, 4.5vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.zdcb35hero-subtitle {
    font-size: 1.05rem;
    opacity: 0.92;
    margin-bottom: 1.75rem;
    max-width: 540px;
}

.zdcb35hero-subtitle strong {
    color: #a7f3d0;
    font-weight: 600;
}

.zdcb35hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.zdcb35hero-visual {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
}

.zdcb35hero-image {
    max-width: 280px;
    margin: 0 auto;
    border-radius: var(--radius);
}

/* Bento 特色 */
.zdcb35features-section {
    background: var(--card-bg);
}

.zdcb35bento-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.zdcb35bento-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: box-shadow var(--transition), border-color var(--transition);
    overflow: hidden;
}

.zdcb35bento-card:hover {
    box-shadow: var(--shadow);
    border-color: rgba(124, 58, 237, 0.25);
}

.zdcb35bento-large {
    grid-column: span 2;
}

.zdcb35bento-wide {
    grid-column: span 2;
}

.zdcb35bento-icon {
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-bottom: 0.75rem;
    display: block;
}

.zdcb35bento-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.zdcb35bento-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0;
}

/* 统计条 */
.zdcb35stats-section {
    padding: 0;
    background: transparent;
}

.zdcb35stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1rem;
    margin-top: -2rem;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow);
}

.zdcb35stat-item {
    text-align: center;
    padding: 0.5rem;
    border-right: 1px solid var(--border);
}

.zdcb35stat-item:last-child {
    border-right: none;
}

.zdcb35stat-number {
    font-size: clamp(1.35rem, 2.5vw, 1.85rem);
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.zdcb35stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* 下载区 */
.zdcb35download-section {
    padding: 4.5rem 0;
    background: var(--surface-alt);
}

.zdcb35download-subtitle {
    color: var(--text-muted);
}

.zdcb35download-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: box-shadow var(--transition), transform var(--transition);
    overflow: hidden;
}

.zdcb35download-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

.zdcb35download-featured {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 1px rgba(124, 58, 237, 0.15);
}

.zdcb35download-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 1rem 0 0.5rem;
}

.zdcb35card-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    flex-grow: 0;
}

.zdcb35platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
    flex-shrink: 0;
}

.zdcb35pc-icon {
    background: linear-gradient(135deg, #0ea5e9, #0369a1);
}

.zdcb35android-icon {
    background: linear-gradient(135deg, #22c55e, #15803d);
}

.zdcb35ios-icon {
    background: linear-gradient(135deg, #6366f1, #4338ca);
}

.zdcb35download-info {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
}

.zdcb35info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.zdcb35info-item:last-child {
    margin-bottom: 0;
}

.zdcb35info-item i {
    color: var(--accent);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.zdcb35download-action {
    margin-top: auto;
}

.zdcb35download-tip {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.zdcb35download-tip p {
    margin: 0;
}

/* 指南步骤 */
.zdcb35guide-section {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.zdcb35steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.zdcb35step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.zdcb35step-num {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--primary);
    background: var(--accent-soft);
    border-radius: 10px;
}

.zdcb35step h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.zdcb35step p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* 安全卡片 */
.zdcb35security-section {
    padding: 4.5rem 0;
    background: var(--surface);
}

.zdcb35security-subtitle {
    color: var(--text-muted);
}

.zdcb35security-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.35rem;
    height: 100%;
    text-align: center;
    transition: box-shadow var(--transition);
    overflow: hidden;
}

.zdcb35security-card:hover {
    box-shadow: var(--shadow);
}

.zdcb35security-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 0.85rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
}

.zdcb35security-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.zdcb35security-features {
    text-align: left;
    background: var(--surface);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
}

.zdcb35security-features .zdcb35feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.zdcb35security-features .zdcb35feature-item:last-child {
    margin-bottom: 0;
}

.zdcb35security-features .zdcb35feature-item i {
    color: var(--accent);
    font-size: 0.75rem;
}

/* FAQ */
.zdcb35faq-section {
    background: var(--surface-alt);
}

.zdcb35faq-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.35rem 1.5rem;
    height: 100%;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.zdcb35faq-card:hover {
    border-color: rgba(124, 58, 237, 0.3);
    box-shadow: var(--shadow);
}

.zdcb35faq-card h5 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.zdcb35faq-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* 文章区 */
.zdcb35article-section {
    background: var(--card-bg);
}

.zdcb35article-card {
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
    overflow: hidden;
    transition: box-shadow var(--transition);
}

.zdcb35article-card:hover {
    box-shadow: var(--shadow) !important;
}

.zdcb35thumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

.zdcb35article-link {
    color: var(--text);
}

.zdcb35article-link:hover {
    color: var(--primary);
}

/* 页脚 */
.zdcb35footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.zdcb35footer-desc {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.6;
}

.zdcb35footer-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.zdcb35footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zdcb35footer-links li {
    margin-bottom: 0.5rem;
}

.zdcb35footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.zdcb35footer-link:hover {
    color: #a7f3d0;
}

.zdcb35friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
}

.zdcb35friend-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
}

.zdcb35friend-links a:hover {
    color: #a7f3d0;
}

.zdcb35footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 1.25rem;
    margin-top: 2rem;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
}

.zdcb35footer-bottom a {
    color: rgba(255, 255, 255, 0.75);
}

.zdcb35footer-bottom a:hover {
    color: #fff;
}

/* 列表/内页 */
.zdcb35py-5 {
    padding-top: 2.5rem !important;
    padding-bottom: 2.5rem !important;
}

.zdcb35pages .pagelist,
.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;
}

.zdcb35article-content {
    line-height: 1.8;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.zdcb35article-content img {
    max-width: 100%;
    height: auto;
}

.listbox .card,
article.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* 兼容旧类名 */
.zdcb35feature-card,
.zdcb35certificate-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.zdcb35container {
    max-width: 1140px;
    margin: 0 auto;
    padding-left: 15px;
    padding-right: 15px;
}

/* 响应式 */
@media (max-width: 991px) {
    .zdcb35bento-large,
    .zdcb35bento-wide {
        grid-column: span 2;
    }

    .zdcb35stats-bar {
        grid-template-columns: repeat(2, 1fr);
        margin-top: -1.5rem;
    }

    .zdcb35stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 0.75rem;
    }

    .zdcb35stat-item:nth-child(2n) {
        border-right: none;
    }

    .zdcb35stat-item:nth-last-child(-n+2) {
        border-bottom: none;
    }
}

@media (max-width: 767px) {
    .zdcb35section {
        padding: 3rem 0;
    }

    .zdcb35hero-section {
        padding: 2.5rem 0 3rem;
    }

    .zdcb35hero-buttons {
        flex-direction: column;
    }

    .zdcb35hero-buttons .zdcb35btn {
        width: 100%;
    }

    .zdcb35bento-grid {
        grid-template-columns: 1fr;
    }

    .zdcb35bento-large,
    .zdcb35bento-wide {
        grid-column: span 1;
    }

    .zdcb35stats-bar {
        grid-template-columns: 1fr 1fr;
        padding: 1rem 0.75rem;
        margin-top: -1rem;
    }

    .zdcb35stat-item:nth-child(odd) {
        border-right: 1px solid var(--border);
    }

    .zdcb35stat-item:nth-child(even) {
        border-right: none;
    }

    .zdcb35stat-item:nth-last-child(-n+2) {
        border-bottom: 1px solid var(--border);
    }

    .zdcb35stat-item:last-child {
        border-bottom: none;
    }

    .zdcb35download-section {
        padding: 3rem 0;
    }

    .zdcb35download-card {
        padding: 1.25rem;
    }

    .zdcb35download-action .zdcb35btn {
        width: 100%;
    }

    .zdcb35navbar {
        padding: 0.5rem 0;
    }

    .zdcb35navbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        max-height: 70vh;
        overflow-y: auto;
    }

    .zdcb35navbar .navbar-nav .nav-link {
        padding: 0.55rem 0.5rem !important;
    }

    .zdcb35navbar-brand img {
        height: 36px;
    }

    .zdcb35thumb-home {
        height: 96px !important;
    }

    #article .card-body,
    .zdcb35article-card .card-body {
        padding: 0.75rem;
    }

    #article h3.h6,
    .zdcb35article-card h3 {
        font-size: 0.9rem;
        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;
        line-height: 1.35;
    }

    .zdcb35thumb-list,
    .zdcb35thumb-related {
        height: 72px !important;
    }

    .zdcb35thumb-side {
        height: 50px !important;
    }

    .zdcb35thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
    }

    .zdcb35footer .row > [class*="col-"] {
        text-align: center;
    }

    .zdcb35friend-links {
        justify-content: center;
    }

    .zdcb35step {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 575px) {
    .zdcb35stats-bar {
        grid-template-columns: 1fr;
    }

    .zdcb35stat-item {
        border-right: none !important;
        border-bottom: 1px solid var(--border) !important;
    }

    .zdcb35stat-item:last-child {
        border-bottom: none !important;
    }

    .zdcb35thumb-home {
        height: 88px !important;
    }

    .zdcb35thumb-list,
    .zdcb35thumb-related {
        height: 64px !important;
    }

    .zdcb35thumb-cover {
        height: 150px !important;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }
}