:root {
    --primary-color: #0f766e;
    --primary-dark: #115e59;
    --primary-light: #14b8a6;
    --accent-color: #ea580c;
    --accent-hover: #c2410c;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --surface: #ffffff;
    --surface-alt: #f0fdfa;
    --surface-dark: #134e4a;
    --border-color: #ccfbf1;
    --border-strong: #99f6e4;
    --shadow-sm: 0 1px 3px rgba(15, 118, 110, 0.08);
    --shadow-md: 0 8px 24px rgba(15, 118, 110, 0.12);
    --radius: 12px;
    --radius-lg: 16px;
    --transition-speed: 0.25s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

/* 导航 */
.z0fa4enavbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.z0fa4enavbar-brand img {
    height: 42px;
    width: auto;
}

.z0fa4enav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: color var(--transition-speed), background var(--transition-speed);
}

.z0fa4enav-link:hover {
    color: var(--primary-color) !important;
    background: var(--surface-alt);
}

/* 主视觉 */
.z0fa4ehero-section {
    background: linear-gradient(160deg, var(--surface-dark) 0%, #0d9488 55%, #2dd4bf 100%);
    color: #fff;
    padding: 4rem 0 4.5rem;
    position: relative;
    overflow: hidden;
}

.z0fa4ehero-section::after {
    content: '';
    position: absolute;
    right: -10%;
    top: -20%;
    width: 50%;
    height: 140%;
    background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, transparent 70%);
    pointer-events: none;
}

.z0fa4ehero-content {
    position: relative;
    z-index: 1;
}

.z0fa4ehero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.z0fa4ehero-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.25;
}

.z0fa4ehero-subtitle {
    font-size: 1.05rem;
    margin-bottom: 1.75rem;
    opacity: 0.92;
    max-width: 36em;
}

.z0fa4ehero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z0fa4ehero-buttons .btn {
    padding: 0.7rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    white-space: normal;
}

.btn-accent {
    background: var(--accent-color);
    border: none;
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

.z0fa4ehero-panel {
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    position: relative;
    z-index: 1;
}

.z0fa4ehero-panel-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.z0fa4ehero-panel-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.z0fa4ehero-panel-item:first-child {
    padding-top: 0;
}

.z0fa4ehero-panel-item i {
    font-size: 1.35rem;
    opacity: 0.9;
    flex-shrink: 0;
    margin-top: 0.15rem;
}

.z0fa4ehero-panel-item strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.z0fa4ehero-panel-item span {
    font-size: 0.85rem;
    opacity: 0.85;
    line-height: 1.4;
}

/* 通用区块 */
.z0fa4esection {
    padding: 4rem 0;
}

.z0fa4esection-head {
    max-width: 640px;
    margin-bottom: 2.5rem;
}

.z0fa4esection-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.z0fa4esection-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

.z0fa4efeatures-section {
    background: var(--surface-alt);
}

/* 特点卡片 */
.z0fa4efeature-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    border-left: 4px solid var(--primary-light);
}

.z0fa4efeature-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    transform: none;
}

.z0fa4efeature-num {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
}

.z0fa4efeature-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.65rem;
}

.z0fa4efeature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* 统计条 */
.z0fa4estats-section {
    background: var(--surface);
    padding: 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.z0fa4estats-grid {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin: 2rem auto;
    max-width: 100%;
}

.z0fa4estats-grid > [class*="col"] {
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.z0fa4estats-grid > [class*="col"]:nth-child(2n) {
    border-right: none;
}

@media (min-width: 768px) {
    .z0fa4estats-grid > [class*="col"] {
        border-bottom: none;
        border-right: 1px solid var(--border-color);
    }

    .z0fa4estats-grid > [class*="col"]:nth-child(2n) {
        border-right: 1px solid var(--border-color);
    }

    .z0fa4estats-grid > [class*="col"]:last-child {
        border-right: none;
    }
}

.z0fa4estat-item {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--surface);
}

.z0fa4estat-number {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.z0fa4estat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

/* 下载区 */
.z0fa4edownload-section {
    padding: 4rem 0;
    background: var(--surface);
}

.z0fa4edownload-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto;
}

.z0fa4edownload-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
    overflow: hidden;
}

.z0fa4edownload-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
    transform: none;
}

.z0fa4edownload-card--highlight {
    border-color: var(--primary-light);
    border-width: 2px;
    background: linear-gradient(180deg, #f0fdfa 0%, #fff 40%);
}

.z0fa4edownload-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin: 1rem 0 0.5rem;
}

.z0fa4ecard-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    flex-grow: 0;
}

.z0fa4eplatform-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.z0fa4eios-icon {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: #fff;
}

.z0fa4eandroid-icon {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #fff;
}

.z0fa4edownload-info {
    margin: 0 0 1.25rem;
    padding: 0;
}

.z0fa4edownload-info li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.z0fa4edownload-info li i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

.z0fa4edownload-action {
    margin-top: auto;
}

.z0fa4edownload-action .btn {
    border-radius: 10px;
    padding: 0.65rem 1rem;
    font-weight: 600;
    white-space: normal;
}

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

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

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

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

/* 知识区块 */
.z0fa4eguide-section {
    background: var(--surface-alt);
}

.z0fa4eguide-block {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    height: 100%;
}

.z0fa4eguide-block h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z0fa4eguide-block p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* 安全 */
.z0fa4esecurity-section {
    padding: 4rem 0;
    background: var(--surface);
}

.z0fa4esecurity-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 520px;
    margin: 0 auto;
}

.z0fa4esecurity-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    text-align: center;
    overflow: hidden;
}

.z0fa4esecurity-card:hover {
    box-shadow: var(--shadow-md);
    transform: none;
}

.z0fa4esecurity-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: #fff;
}

.z0fa4esecurity-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.z0fa4esecurity-features {
    background: var(--surface-alt);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

.z0fa4efeature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.z0fa4efeature-item:last-child {
    margin-bottom: 0;
}

.z0fa4efeature-item i {
    color: var(--primary-color);
    font-size: 0.85rem;
    flex-shrink: 0;
}

/* FAQ */
.z0fa4efaq-section {
    background: var(--surface-alt);
}

.z0fa4efaq-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    height: 100%;
}

.z0fa4efaq-card h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z0fa4efaq-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* 文章区 */
.z0fa4earticle-section {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
}

.z0fa4earticle-card {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius) !important;
    overflow: hidden;
    box-shadow: var(--shadow-sm) !important;
}

.z0fa4ethumb-home {
    height: 120px;
    width: 100%;
    object-fit: cover;
}

/* 页脚 */
.z0fa4efooter {
    background: var(--surface-dark);
    padding: 3rem 0 1.5rem;
    color: rgba(255,255,255,0.85);
}

.z0fa4efooter-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.z0fa4efooter-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z0fa4efooter-links li {
    margin-bottom: 0.5rem;
}

.z0fa4efooter-link {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed);
}

.z0fa4efooter-link:hover {
    color: #fff;
}

.z0fa4efooter-bottom {
    border-top: 1px solid rgba(255,255,255,0.15);
    padding-top: 1.25rem;
    margin-top: 2rem;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.z0fa4efooter-bottom a {
    color: rgba(255,255,255,0.75);
    text-decoration: none;
}

.z0fa4efooter-bottom a:hover {
    color: #fff;
}

.z0fa4efriend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z0fa4efriend-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.88rem;
}

/* 列表/内页 */
.z0fa4epy-5 {
    padding-top: 2.5rem !important;
    padding-bottom: 2.5rem !important;
}

.listbox .e2 li {
    border-color: var(--border-color) !important;
}

.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;
}

.z0fa4epages .pagelist a,
.z0fa4epages .pagelist span {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.z0fa4epages .pagelist a:hover {
    background: var(--surface-alt);
    border-color: var(--primary-light);
    color: var(--primary-color);
}

.z0fa4earticle-content {
    line-height: 1.8;
    word-break: break-word;
}

.z0fa4earticle-content img {
    max-width: 100%;
    height: auto;
}

.z0fa4emeta-tags .z0fa4etagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--surface-alt);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.85rem;
    color: var(--primary-color);
    text-decoration: none;
}

/* 内页卡片统一边框 */
.z0fa4epy-5 .card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.z0fa4ethumb-list,
.z0fa4ethumb-related {
    height: 84px;
    width: 100%;
    object-fit: cover;
}

.z0fa4ethumb-side {
    height: 54px;
    width: 100%;
    object-fit: cover;
}

.z0fa4ethumb-cover {
    max-width: 100%;
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
}

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

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

@media (max-width: 991px) {
    .z0fa4enavbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        max-height: 70vh;
        overflow-y: auto;
    }

    .z0fa4efooter .row > [class*="col"] {
        text-align: center;
    }

    .z0fa4efooter-links {
        margin-bottom: 0.5rem;
    }
}

@media (max-width: 767px) {
    .z0fa4ehero-section {
        padding: 2.5rem 0 3rem;
    }

    .z0fa4esection {
        padding: 2.75rem 0;
    }

    .z0fa4esection-head {
        margin-bottom: 1.75rem;
    }

    .z0fa4ehero-buttons {
        flex-direction: column;
    }

    .z0fa4ehero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .z0fa4edownload-section {
        padding: 2.75rem 0;
    }

    .z0fa4edownload-card {
        padding: 1.25rem;
    }

    .z0fa4estats-grid {
        margin: 1.5rem 0;
    }

    .z0fa4estat-item {
        padding: 1.15rem 0.75rem;
    }

    .z0fa4enavbar {
        padding: 0.5rem 0;
    }

    .z0fa4enavbar-brand img {
        height: 36px;
    }

    .z0fa4enav-link {
        padding: 0.5rem 0.25rem !important;
        font-size: 0.92rem;
    }

    #article .z0fa4ethumb-home {
        height: 96px !important;
    }

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

    #article h3.h6,
    #article .h6 {
        font-size: 0.92rem;
        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;
    }

    .z0fa4ethumb-list,
    .z0fa4ethumb-related {
        height: 72px !important;
    }

    .z0fa4ethumb-side {
        height: 50px !important;
    }

    .z0fa4ethumb-cover {
        height: 170px !important;
    }

    .z0fa4eguide-block,
    .z0fa4efaq-card,
    .z0fa4efeature-card {
        padding: 1.15rem;
    }

    .z0fa4esecurity-card {
        padding: 1.25rem;
    }

    .z0fa4edownload-action .btn {
        width: 100%;
    }
}

@media (max-width: 575px) {
    .z0fa4econtainer.container,
    .container {
        padding-left: 14px;
        padding-right: 14px;
    }

    #article .z0fa4ethumb-home {
        height: 88px !important;
    }

    .z0fa4ethumb-list,
    .z0fa4ethumb-related {
        height: 64px !important;
    }

    .z0fa4ethumb-cover {
        height: 150px !important;
    }

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

/* 防止卡片内容溢出 */
.card,
.z0fa4edownload-card,
.z0fa4esecurity-card,
.z0fa4efeature-card {
    min-width: 0;
    word-wrap: break-word;
}

.btn {
    position: relative;
}

.btn:active {
    transform: scale(0.98);
}