:root {
    --primary: #1a6b5c;
    --primary-dark: #0f4539;
    --accent: #e07a3a;
    --accent-soft: rgba(224, 122, 58, 0.12);
    --surface: #ffffff;
    --surface-alt: #f4f7f6;
    --text: #1e2d2a;
    --text-muted: #5c6f6a;
    --border: #d4e0dc;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(26, 107, 92, 0.08);
    --shadow-hover: 0 12px 32px rgba(26, 107, 92, 0.14);
    --container: min(1140px, 100% - 2rem);
    --section-pad: clamp(3rem, 6vw, 5rem);
    --transition: 0.25s ease;
}

*,
*::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);
    line-height: 1.65;
    background: var(--surface-alt);
    margin: 0;
    overflow-x: hidden;
}

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

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

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

/* —— 导航 —— */
.z65c45navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.z65c45container.container {
    max-width: var(--container);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.z65c45navbar-brand img {
    height: 42px;
    width: auto;
}

.z65c45nav-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);
}

.z65c45nav-link:hover {
    color: var(--primary) !important;
    background: var(--accent-soft);
}

.z65c45navbar .navbar-toggler {
    border: 1px solid var(--border);
    padding: 0.4rem 0.55rem;
}

.z65c45navbar .navbar-collapse {
    background: var(--surface);
}

/* —— 首页 Hero —— */
.z65c45hero-section {
    background: linear-gradient(160deg, var(--primary-dark) 0%, var(--primary) 55%, #2a8f7a 100%);
    color: #fff;
    padding: var(--section-pad) 0;
    position: relative;
    overflow: hidden;
}

.z65c45hero-section::after {
    content: "";
    position: absolute;
    right: -8%;
    top: 10%;
    width: 45%;
    height: 80%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.z65c45hero-content {
    position: relative;
    z-index: 1;
}

.z65c45hero-badge {
    display: inline-block;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

.z65c45hero-title {
    font-size: clamp(1.85rem, 4.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.z65c45hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.92;
    max-width: 36em;
    margin-bottom: 1.5rem;
}

.z65c45hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z65c45hero-buttons .btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.7rem 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
}

.z65c45hero-buttons .btn-light {
    background: #fff;
    color: var(--primary-dark);
    border: none;
}

.z65c45hero-buttons .btn-primary,
.z65c45btn.btn-primary {
    background: var(--accent);
    border: none;
    color: #fff;
}

.z65c45hero-buttons .btn-primary:hover,
.z65c45btn.btn-primary:hover {
    background: #c96a2f;
    color: #fff;
}

.z65c45hero-image-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.z65c45hero-image {
    max-width: min(320px, 90%);
    margin: 0 auto;
    border-radius: var(--radius-lg);
    border: 3px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-hover);
}

.z65c45hero-image-shadow {
    display: none;
}

/* —— 通用区块 —— */
.z65c45section {
    padding: var(--section-pad) 0;
}

.z65c45section-alt {
    background: var(--surface);
}

.z65c45section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.z65c45section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.65rem;
}

.z65c45section-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— 产品亮点 —— */
.z65c45features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.z65c45feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    height: 100%;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

.z65c45feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.z65c45feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    background: var(--accent-soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.z65c45feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
}

.z65c45feature-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
    flex: 1;
}

/* —— 服务数据 —— */
.z65c45stats-section {
    background: var(--primary-dark);
    color: #fff;
    padding: clamp(2rem, 4vw, 3rem) 0;
}

.z65c45stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.z65c45stat-item {
    text-align: center;
    padding: 1rem 0.5rem;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.z65c45stat-item:last-child {
    border-right: none;
}

.z65c45stat-number {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    line-height: 1.2;
}

.z65c45stat-label {
    font-size: 0.88rem;
    opacity: 0.85;
    margin-top: 0.25rem;
}

/* —— 下载区 —— */
.z65c45download-section {
    padding: var(--section-pad) 0;
    background: var(--surface-alt);
}

.z65c45download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    align-items: stretch;
}

.z65c45download-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.z65c45download-card-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    min-width: 0;
}

.z65c45platform-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    color: #fff;
}

.z65c45ios-icon {
    background: linear-gradient(135deg, #2b7cd3, #1a5a9e);
}

.z65c45android-icon {
    background: linear-gradient(135deg, #3ddc84, #2a9d5c);
}

.z65c45download-card-head h3 {
    font-size: 1.05rem;
    margin: 0 0 0.2rem;
    color: var(--primary-dark);
    word-break: break-word;
}

.z65c45download-card-head p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.z65c45download-info {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    flex: 1;
}

.z65c45info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.z65c45info-item:last-child {
    margin-bottom: 0;
}

.z65c45info-item i {
    color: var(--primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z65c45download-action {
    margin-top: auto;
}

.z65c45download-action .btn {
    width: 100%;
    border-radius: 10px;
    padding: 0.65rem 1rem;
    font-weight: 600;
    white-space: normal;
}

/* —— 知识科普 —— */
.z65c45knowledge-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.z65c45knowledge-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.z65c45knowledge-card h3 {
    font-size: 1.05rem;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.z65c45knowledge-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— 安全保障 —— */
.z65c45security-section {
    padding: var(--section-pad) 0;
    background: var(--surface);
}

.z65c45security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.z65c45security-card {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    height: 100%;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
}

.z65c45security-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 0.85rem;
    flex-shrink: 0;
}

.z65c45security-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.z65c45security-features {
    flex: 1;
}

.z65c45feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.z65c45feature-item i {
    color: var(--primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z65c45cert-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.z65c45certificate-card {
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    height: 100%;
    min-height: 140px;
}

.z65c45certificate-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 0.75rem;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.z65c45certificate-card h4 {
    font-size: 0.95rem;
    color: var(--primary-dark);
    margin-bottom: 0.35rem;
}

.z65c45certificate-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— FAQ —— */
.z65c45faq-section {
    padding: var(--section-pad) 0;
    background: var(--surface-alt);
}

.z65c45faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.z65c45faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    height: 100%;
}

.z65c45faq-item h5 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z65c45faq-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

/* —— 文章区 —— */
#article {
    padding: var(--section-pad) 0;
    background: var(--surface);
}

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

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

.z65c45thumb-home {
    width: 100%;
    height: 110px;
    object-fit: cover;
}

#article h3.h5 {
    font-size: 0.92rem;
    line-height: 1.4;
    margin: 0;
}

#article h3.h5 a {
    color: var(--text);
}

#article h3.h5 a:hover {
    color: var(--primary);
}

/* —— 页脚 —— */
.z65c45footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.z65c45footer-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.z65c45footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z65c45footer-links li {
    margin-bottom: 0.5rem;
}

.z65c45footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.z65c45footer-link:hover {
    color: var(--accent);
}

.z65c45footer p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.z65c45footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 1.25rem;
    margin-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
}

.z65c45footer-bottom a {
    color: rgba(255, 255, 255, 0.75);
}

.z65c45friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z65c45friend-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
}

/* —— 列表/内页 —— */
.z65c45page-main {
    padding: var(--section-pad) 0;
    background: var(--surface-alt);
    min-height: 50vh;
}

.z65c45page-main .card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.z65c45page-main .card-body {
    padding: 1.25rem;
}

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

.z65c45article-content {
    line-height: 1.75;
    word-break: break-word;
}

.z65c45article-content img {
    max-width: 100%;
    height: auto;
}

.z65c45thumb-list,
.z65c45thumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: 8px;
}

.z65c45thumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    border-radius: 6px;
}

.z65c45thumb-cover {
    max-width: 100%;
    width: 100%;
    height: auto;
    max-height: 280px;
    object-fit: cover;
    border-radius: var(--radius);
}

.z65c45meta-tags .z65c45tagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--accent-soft);
    border-radius: 6px;
    font-size: 0.85rem;
}

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

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

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

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

/* —— 响应式 —— */
@media (max-width: 991px) {
    .z65c45features-grid {
        grid-template-columns: 1fr;
    }

    .z65c45stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z65c45stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding: 1rem;
    }

    .z65c45stat-item:nth-child(2n) {
        border-right: none;
    }

    .z65c45security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z65c45knowledge-grid {
        grid-template-columns: 1fr;
    }

    .z65c45cert-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .z65c45navbar {
        padding: 0.5rem 0;
    }

    .z65c45navbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        max-height: 70vh;
        overflow-y: auto;
    }

    .z65c45nav-link {
        padding: 0.5rem 0.35rem !important;
    }

    .z65c45hero-section {
        text-align: center;
    }

    .z65c45hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .z65c45hero-buttons {
        justify-content: center;
    }

    .z65c45hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }

    .z65c45download-grid {
        grid-template-columns: 1fr;
    }

    .z65c45download-card-head {
        flex-direction: column;
        text-align: center;
    }

    .z65c45faq-grid {
        grid-template-columns: 1fr;
    }

    .z65c45security-grid {
        grid-template-columns: 1fr;
    }

    .z65c45security-card {
        min-height: auto;
    }

    .z65c45footer .row > [class*="col-"] {
        text-align: center;
        margin-bottom: 1.5rem;
    }

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

    .z65c45thumb-home {
        height: 96px;
    }

    .z65c45thumb-list,
    .z65c45thumb-related {
        height: 72px;
    }

    .z65c45thumb-side {
        height: 50px;
    }

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

    .z65c45page-main .card-body {
        padding: 1rem;
    }
}

@media (max-width: 575px) {
    .z65c45stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .z65c45stat-item:nth-child(odd) {
        border-right: 1px solid rgba(255, 255, 255, 0.12);
    }

    #article .z65c45thumb-home {
        height: 88px;
    }

    .z65c45thumb-list,
    .z65c45thumb-related {
        height: 64px;
    }

    .z65c45thumb-cover {
        max-height: 200px;
    }
}