/* AiCoin 官网主题 — 靛青 + 翡翠绿 */
:root {
    --ac-primary: #0d9488;
    --ac-primary-dark: #0f766e;
    --ac-accent: #f59e0b;
    --ac-ink: #0f172a;
    --ac-muted: #64748b;
    --ac-surface: #ffffff;
    --ac-bg: #f1f5f9;
    --ac-border: #e2e8f0;
    --ac-radius: 12px;
    --ac-radius-lg: 20px;
    --ac-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    --ac-transition: 0.25s ease;
}

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

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

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

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

/* —— 导航 —— */
.zee740navbar {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--ac-border);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.zee740navbar-brand img {
    height: 42px;
    width: auto;
}

.zee740nav-link {
    color: var(--ac-ink) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: color var(--ac-transition), background var(--ac-transition);
}

.zee740nav-link:hover {
    color: var(--ac-primary) !important;
    background: rgba(13, 148, 136, 0.08);
}

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

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

/* —— 首页 Hero —— */
.zee740hero-section {
    background: linear-gradient(160deg, #0f172a 0%, #134e4a 55%, #0d9488 100%);
    color: #fff;
    padding: 4.5rem 0 5rem;
    position: relative;
    overflow: hidden;
}

.zee740hero-section::after {
    content: '';
    position: absolute;
    right: -8%;
    top: 10%;
    width: 45%;
    height: 80%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.zee740hero-content {
    position: relative;
    z-index: 1;
}

.zee740hero-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    border: 1px solid rgba(245, 158, 11, 0.35);
}

.zee740hero-title {
    font-size: clamp(1.85rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.zee740hero-subtitle {
    font-size: 1.05rem;
    opacity: 0.92;
    max-width: 540px;
    margin-bottom: 1.75rem;
}

.zee740hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.zee740hero-buttons .btn {
    padding: 0.7rem 1.35rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
}

.zee740hero-buttons .btn-light {
    background: #fff;
    color: var(--ac-primary-dark);
}

.zee740hero-buttons .btn-primary,
.zee740btn-primary {
    background: var(--ac-accent);
    color: #1c1917;
}

.zee740hero-buttons .btn-primary:hover,
.zee740btn-primary:hover {
    background: #fbbf24;
    color: #1c1917;
}

.zee740hero-image-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.zee740hero-image {
    max-width: 280px;
    width: 100%;
    border-radius: var(--ac-radius-lg);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.25);
    border: 3px solid rgba(255, 255, 255, 0.15);
}

.zee740hero-image-shadow {
    display: none;
}

/* —— 区块通用 —— */
.zee740section {
    padding: 4rem 0;
}

.zee740section-alt {
    background: var(--ac-bg);
}

.zee740section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.zee740section-head h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--ac-ink);
    margin-bottom: 0.65rem;
}

.zee740section-head p {
    color: var(--ac-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— 优势卡片 —— */
.zee740features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.zee740feature-card {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.75rem 1.5rem;
    height: 100%;
    transition: border-color var(--ac-transition), box-shadow var(--ac-transition);
    overflow: hidden;
}

.zee740feature-card:hover {
    border-color: var(--ac-primary);
    box-shadow: var(--ac-shadow);
}

.zee740feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--ac-primary), var(--ac-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1.15rem;
}

.zee740feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.zee740feature-card p {
    font-size: 0.92rem;
    color: var(--ac-muted);
    margin: 0;
}

/* —— 数据条 —— */
.zee740stats-section {
    background: var(--ac-ink);
    color: #fff;
    padding: 3rem 0;
}

.zee740stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: center;
}

.zee740stat-number {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--ac-accent);
    line-height: 1.2;
}

.zee740stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-top: 0.35rem;
}

/* —— 下载区 —— */
.zee740download-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, #ecfdf5 0%, var(--ac-bg) 100%);
}

.zee740download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    max-width: 900px;
    margin: 0 auto;
}

.zee740download-card {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.zee740download-card-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.15rem;
}

.zee740platform-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
}

.zee740ios-icon {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.zee740android-icon {
    background: linear-gradient(135deg, #10b981, #059669);
}

.zee740download-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0 0 0.2rem;
}

.zee740download-card .text-muted {
    font-size: 0.85rem;
    margin: 0;
}

.zee740download-info {
    background: var(--ac-bg);
    border-radius: var(--ac-radius);
    padding: 1rem 1.1rem;
    flex: 1;
    margin-bottom: 1.15rem;
    border: 1px solid var(--ac-border);
}

.zee740info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--ac-muted);
    margin-bottom: 0.5rem;
}

.zee740info-item:last-child {
    margin-bottom: 0;
}

.zee740info-item i {
    color: var(--ac-primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.zee740download-action .btn {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 10px;
    font-weight: 600;
    background: var(--ac-primary);
    border: none;
    color: #fff;
    white-space: normal;
}

.zee740download-action .btn:hover {
    background: var(--ac-primary-dark);
    color: #fff;
}

/* —— 安全 —— */
.zee740security-section {
    padding: 4rem 0;
    background: var(--ac-surface);
}

.zee740security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.zee740security-card {
    background: var(--ac-bg);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.35rem 1.15rem;
    height: 100%;
    text-align: center;
    overflow: hidden;
}

.zee740security-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 0.85rem;
    border-radius: 12px;
    background: var(--ac-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
}

.zee740security-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.zee740security-features {
    text-align: left;
    font-size: 0.82rem;
}

.zee740feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.4rem;
    margin-bottom: 0.4rem;
    color: var(--ac-muted);
}

.zee740feature-item i {
    color: var(--ac-primary);
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.zee740cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.zee740certificate-card {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    padding: 1.25rem;
    text-align: center;
    height: 100%;
}

.zee740certificate-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 0.65rem;
    border-radius: 50%;
    background: rgba(13, 148, 136, 0.12);
    color: var(--ac-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.zee740certificate-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.zee740certificate-card p {
    font-size: 0.82rem;
    color: var(--ac-muted);
    margin: 0;
}

/* —— FAQ —— */
.zee740faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.zee740faq-item {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    padding: 1.25rem 1.35rem;
    height: 100%;
    overflow: hidden;
}

.zee740faq-item h5 {
    font-size: 0.98rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--ac-ink);
}

.zee740faq-item p {
    font-size: 0.9rem;
    color: var(--ac-muted);
    margin: 0;
}

/* —— 知识简介 —— */
.zee740knowledge {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.zee740knowledge-block {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.5rem;
    overflow: hidden;
}

.zee740knowledge-block h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.65rem;
    color: var(--ac-primary-dark);
}

.zee740knowledge-block p {
    font-size: 0.92rem;
    color: var(--ac-muted);
    margin-bottom: 0.65rem;
}

.zee740knowledge-block p:last-child {
    margin-bottom: 0;
}

/* —— 文章区 —— */
#article .card {
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    overflow: hidden;
    height: 100%;
}

#article .card-img-top {
    height: 110px;
    object-fit: cover;
    width: 100%;
}

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

#article h3.h5 {
    font-size: 0.9rem;
    line-height: 1.4;
}

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

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

/* —— 页脚 —— */
.zee740footer {
    background: var(--ac-ink);
    color: #94a3b8;
    padding: 3rem 0 1.5rem;
}

.zee740footer-title {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.zee740footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zee740footer-links li {
    margin-bottom: 0.5rem;
}

.zee740footer-link {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--ac-transition);
}

.zee740footer-link:hover {
    color: var(--ac-accent);
}

.zee740friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.zee740friend-links a {
    color: #94a3b8;
    font-size: 0.85rem;
    text-decoration: none;
}

.zee740friend-links a:hover {
    color: #fff;
}

.zee740footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.25rem;
    margin-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
}

.zee740footer-bottom a {
    color: #cbd5e1;
    text-decoration: none;
}

.zee740footer-bottom a:hover {
    color: var(--ac-accent);
}

/* —— 列表/内页 —— */
.zee740page-main {
    padding: 2.5rem 0 3rem;
    background: var(--ac-bg);
    min-height: 50vh;
}

.zee740page-main .card {
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    overflow: hidden;
}

.zee740article-content {
    font-size: 1rem;
    line-height: 1.75;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.zee740article-content img {
    max-width: 100%;
    height: auto;
}

.zee740meta-tags a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--ac-bg);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--ac-primary);
    text-decoration: none;
    margin: 0.2rem;
}

.zee740thumb-list,
.zee740thumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: 8px;
}

.zee740thumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    border-radius: 6px;
}

.zee740thumb-cover {
    max-width: 100%;
    width: 100%;
    height: auto;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--ac-radius);
}

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

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

/* —— Bootstrap 按钮覆盖 —— */
.btn-primary.zee740btn {
    background: var(--ac-primary);
    border-color: var(--ac-primary);
}

.btn-primary.zee740btn:hover {
    background: var(--ac-primary-dark);
    border-color: var(--ac-primary-dark);
}

.btn-outline-primary.zee740btn {
    color: var(--ac-primary);
    border-color: var(--ac-primary);
}

.btn-outline-primary.zee740btn:hover {
    background: var(--ac-primary);
    color: #fff;
}

/* —— 响应式 —— */
@media (max-width: 991px) {
    .zee740features-grid,
    .zee740security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .zee740stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .zee740knowledge {
        grid-template-columns: 1fr;
    }

    .zee740cert-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .zee740hero-section {
        padding: 3rem 0 3.5rem;
        text-align: center;
    }

    .zee740hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .zee740hero-buttons {
        justify-content: center;
    }

    .zee740hero-buttons .btn {
        width: 100%;
        max-width: 320px;
    }

    .zee740hero-image-container {
        margin-top: 1.5rem;
    }

    .zee740hero-image {
        max-width: 220px;
    }

    .zee740section {
        padding: 2.75rem 0;
    }

    .zee740features-grid,
    .zee740download-grid,
    .zee740faq-grid {
        grid-template-columns: 1fr;
    }

    .zee740security-grid {
        grid-template-columns: 1fr;
    }

    .zee740stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .zee740download-card-head {
        flex-wrap: wrap;
    }

    .zee740navbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        border: 1px solid var(--ac-border);
        border-radius: var(--ac-radius);
        max-height: 70vh;
        overflow-y: auto;
    }

    .zee740nav-link {
        padding: 0.5rem 0.75rem !important;
    }

    #article .row {
        --bs-gutter-y: 0.75rem;
    }

    #article .card-img-top {
        height: 100px;
    }

    .zee740thumb-list,
    .zee740thumb-related {
        height: 72px;
    }

    .zee740thumb-cover {
        max-height: 200px;
    }

    .zee740footer .row > [class*="col-"] {
        text-align: center;
        margin-bottom: 1.5rem;
    }

    .zee740friend-links {
        justify-content: center;
    }
}

@media (max-width: 575px) {
    .zee740stat-number {
        font-size: 1.5rem;
    }

    .zee740section-head {
        margin-bottom: 1.75rem;
    }

    .zee740download-card,
    .zee740feature-card,
    .zee740security-card,
    .zee740faq-item {
        padding: 1.15rem;
    }

    #article .card-img-top {
        height: 88px;
    }

    .zee740thumb-list,
    .zee740thumb-related {
        height: 64px;
    }
}