/* AICoin 官网主题 — 青墨绿 + 琥珀强调色 */
:root {
    --ac-primary: #1a6b5c;
    --ac-primary-dark: #0f4a40;
    --ac-accent: #d4a017;
    --ac-accent-light: #f0c14b;
    --ac-surface: #f6f9f8;
    --ac-surface-alt: #e8f0ee;
    --ac-text: #1e2d2a;
    --ac-text-muted: #5a6f6a;
    --ac-white: #ffffff;
    --ac-border: rgba(26, 107, 92, 0.12);
    --ac-radius: 12px;
    --ac-radius-lg: 20px;
    --ac-shadow: 0 4px 24px rgba(15, 74, 64, 0.08);
    --ac-shadow-hover: 0 12px 32px rgba(15, 74, 64, 0.14);
    --ac-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --ac-container: 1140px;
}

*,
*::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(--ac-text);
    line-height: 1.65;
    background: var(--ac-white);
    margin: 0;
    overflow-x: hidden;
}

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

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

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

/* —— 导航 —— */
.za0616navbar {
    background: var(--ac-white);
    border-bottom: 1px solid var(--ac-border);
    padding: 0.65rem 0;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.za0616navbar-brand img {
    height: 42px;
    width: auto;
}

.za0616nav-link {
    color: var(--ac-text) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 8px;
    transition: background var(--ac-transition), color var(--ac-transition);
}

.za0616nav-link:hover {
    color: var(--ac-primary) !important;
    background: var(--ac-surface-alt);
}

.za0616navbar .navbar-toggler {
    border: 1px solid var(--ac-border);
    padding: 0.4rem 0.55rem;
}

.za0616navbar .navbar-collapse {
    background: var(--ac-white);
}

@media (max-width: 991px) {
    .za0616navbar .navbar-collapse {
        margin-top: 0.5rem;
        padding: 0.75rem;
        border-radius: var(--ac-radius);
        border: 1px solid var(--ac-border);
        max-height: 70vh;
        overflow-y: auto;
    }

    .za0616navbar .nav-link {
        padding: 0.5rem 0.25rem !important;
    }
}

/* —— 通用区块 —— */
.za0616container.container {
    max-width: var(--ac-container);
}

.ac-section {
    padding: 4.5rem 0;
}

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

.ac-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--ac-primary-dark);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.ac-section-lead {
    color: var(--ac-text-muted);
    font-size: 1.05rem;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.ac-section-lead.ac-center {
    text-align: center;
}

/* —— Hero —— */
.za0616hero-section {
    background: linear-gradient(145deg, var(--ac-primary-dark) 0%, var(--ac-primary) 55%, #238f7a 100%);
    color: var(--ac-white);
    padding: clamp(3rem, 8vw, 5.5rem) 0;
    position: relative;
    overflow: hidden;
}

.za0616hero-section::after {
    content: "";
    position: absolute;
    right: -10%;
    top: -20%;
    width: 50%;
    height: 140%;
    background: radial-gradient(ellipse, rgba(212, 160, 23, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.za0616hero-content {
    position: relative;
    z-index: 1;
}

.za0616hero-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: 50px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.za0616hero-title {
    font-size: clamp(1.75rem, 4.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
}

.za0616hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    opacity: 0.92;
    margin-bottom: 1.75rem;
    max-width: 520px;
}

.za0616hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.za0616hero-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(--ac-transition), box-shadow var(--ac-transition);
}

.za0616hero-buttons .btn-light {
    background: var(--ac-white);
    color: var(--ac-primary-dark);
}

.za0616hero-buttons .btn-accent {
    background: var(--ac-accent);
    color: var(--ac-primary-dark);
}

.za0616hero-buttons .btn-outline-light {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.6);
    color: var(--ac-white);
}

.za0616hero-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.za0616hero-image-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.za0616hero-image {
    max-width: 280px;
    width: 100%;
    border-radius: var(--ac-radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
    object-fit: contain;
}

.za0616hero-image-shadow {
    display: none;
}

/* —— 简介条 —— */
.ac-intro-strip {
    background: var(--ac-white);
    border-bottom: 1px solid var(--ac-border);
    padding: 2rem 0;
}

.ac-intro-strip p {
    margin: 0;
    font-size: 1.02rem;
    color: var(--ac-text-muted);
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.ac-intro-strip strong {
    color: var(--ac-primary);
}

/* —— 特点 Bento —— */
#features.ac-section {
    padding-top: 4rem;
}

.ac-bento {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.25rem;
}

.ac-bento-item {
    background: var(--ac-white);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.75rem;
    box-shadow: var(--ac-shadow);
    transition: box-shadow var(--ac-transition), border-color var(--ac-transition);
    overflow: hidden;
    min-height: 0;
}

.ac-bento-item:hover {
    box-shadow: var(--ac-shadow-hover);
    border-color: rgba(26, 107, 92, 0.25);
}

.ac-bento-item.span-4 { grid-column: span 4; }
.ac-bento-item.span-6 { grid-column: span 6; }
.ac-bento-item.span-8 { grid-column: span 8; }
.ac-bento-item.span-12 { grid-column: span 12; }

.ac-bento-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--ac-primary), var(--ac-primary-dark));
    color: var(--ac-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.ac-bento-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ac-primary-dark);
    margin-bottom: 0.5rem;
}

.ac-bento-item p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--ac-text-muted);
    line-height: 1.6;
}

.ac-bento-highlight {
    background: linear-gradient(135deg, var(--ac-primary-dark), var(--ac-primary));
    color: var(--ac-white);
    border: none;
}

.ac-bento-highlight h3,
.ac-bento-highlight p {
    color: rgba(255, 255, 255, 0.95);
}

.ac-bento-highlight .ac-bento-icon {
    background: rgba(255, 255, 255, 0.2);
}

/* —— 统计 —— */
.za0616stats-section {
    background: var(--ac-primary-dark);
    color: var(--ac-white);
    padding: 3rem 0;
}

.za0616stats-section .row {
    row-gap: 1.5rem;
}

.za0616stat-item {
    text-align: center;
    padding: 0.5rem;
}

.za0616stat-number {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--ac-accent-light);
    line-height: 1.2;
}

.za0616stat-label {
    font-size: 0.95rem;
    opacity: 0.88;
    margin-top: 0.25rem;
}

/* —— 下载 —— */
.za0616download-section {
    padding: 4.5rem 0;
    background: var(--ac-surface);
}

.za0616download-header h2 {
    color: var(--ac-primary-dark);
    font-weight: 700;
}

.za0616download-subtitle {
    color: var(--ac-text-muted);
}

.za0616download-card {
    background: var(--ac-white);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    box-shadow: var(--ac-shadow);
    height: 100%;
    overflow: hidden;
    transition: box-shadow var(--ac-transition);
}

.za0616download-card:hover {
    box-shadow: var(--ac-shadow-hover);
}

.za0616download-card .card-body {
    padding: 1.5rem;
}

.za0616platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.za0616ios-icon {
    background: linear-gradient(135deg, #2b7cd3, #1a5fb4);
    color: var(--ac-white);
}

.za0616android-icon {
    background: linear-gradient(135deg, #3ddc84, #2a9d5c);
    color: var(--ac-white);
}

.za0616download-info {
    background: var(--ac-surface);
    padding: 1rem 1.15rem;
    border-radius: var(--ac-radius);
    border: 1px solid var(--ac-border);
}

.za0616info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    color: var(--ac-text-muted);
}

.za0616info-item:last-child {
    margin-bottom: 0;
}

.za0616info-item i {
    color: var(--ac-primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.za0616download-action .btn,
.za0616btn.btn-primary {
    background: var(--ac-primary);
    border: none;
    color: var(--ac-white);
    padding: 0.65rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    transition: background var(--ac-transition), transform var(--ac-transition);
}

.za0616download-action .btn:hover,
.za0616btn.btn-primary:hover {
    background: var(--ac-primary-dark);
    transform: translateY(-1px);
    color: var(--ac-white);
}

.za0616btn.btn-outline-primary {
    border-color: var(--ac-primary);
    color: var(--ac-primary);
    border-radius: 10px;
}

.za0616btn.btn-outline-primary:hover {
    background: var(--ac-primary);
    color: var(--ac-white);
}

/* 三端下载小卡 */
.ac-platform-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.ac-platform-mini {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--ac-white);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    transition: border-color var(--ac-transition);
}

.ac-platform-mini:hover {
    border-color: var(--ac-primary);
}

.ac-platform-mini i {
    font-size: 1.75rem;
    color: var(--ac-primary);
    margin-bottom: 0.5rem;
}

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

.ac-platform-mini p {
    font-size: 0.8rem;
    color: var(--ac-text-muted);
    margin-bottom: 0.75rem;
}

.ac-platform-mini .btn-sm {
    font-size: 0.8rem;
    padding: 0.4rem 0.85rem;
    border-radius: 8px;
}

/* —— 知识区 —— */
.ac-knowledge {
    padding: 4.5rem 0;
}

.ac-knowledge-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.ac-knowledge-card {
    background: var(--ac-white);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.75rem;
    height: 100%;
}

.ac-knowledge-card h3 {
    font-size: 1.1rem;
    color: var(--ac-primary-dark);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--ac-accent);
    display: inline-block;
}

.ac-knowledge-card ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--ac-text-muted);
    font-size: 0.95rem;
}

.ac-knowledge-card li {
    margin-bottom: 0.5rem;
}

.ac-knowledge-card p {
    margin: 0 0 0.75rem;
    color: var(--ac-text-muted);
    font-size: 0.95rem;
}

/* —— 安全 —— */
.za0616security-section {
    padding: 4.5rem 0;
    background: var(--ac-white);
}

.za0616security-header h2 {
    color: var(--ac-primary-dark);
    font-weight: 700;
}

.za0616security-subtitle {
    color: var(--ac-text-muted);
}

.za0616security-section .row {
    row-gap: 1.25rem;
}

.za0616security-card {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    padding: 1.5rem;
    height: 100%;
    text-align: center;
    transition: box-shadow var(--ac-transition);
    overflow: hidden;
}

.za0616security-card:hover {
    box-shadow: var(--ac-shadow);
}

.za0616security-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--ac-primary);
    color: var(--ac-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
}

.za0616security-card h3 {
    font-size: 1rem;
    color: var(--ac-primary-dark);
    margin-bottom: 0.75rem;
}

.za0616security-features {
    background: var(--ac-white);
    border-radius: var(--ac-radius);
    padding: 0.85rem;
    border: 1px solid var(--ac-border);
    text-align: left;
}

.za0616feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--ac-text-muted);
    margin-bottom: 0.45rem;
}

.za0616feature-item:last-child {
    margin-bottom: 0;
}

.za0616feature-item i {
    color: var(--ac-primary);
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.za0616certificate-card {
    background: var(--ac-surface);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    padding: 1.25rem;
    text-align: center;
    height: 100%;
}

.za0616certificate-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--ac-primary);
    color: var(--ac-white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
    font-size: 1.1rem;
}

.za0616certificate-card h4 {
    font-size: 0.95rem;
    color: var(--ac-primary-dark);
    margin-bottom: 0.35rem;
}

.za0616certificate-card p {
    font-size: 0.82rem;
    color: var(--ac-text-muted);
    margin: 0;
}

/* —— FAQ —— */
#faq.ac-section {
    background: var(--ac-surface);
}

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

.ac-faq-item {
    background: var(--ac-white);
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius);
    padding: 1.25rem 1.5rem;
    height: 100%;
}

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

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

/* —— 文章区 —— */
#article.ac-section {
    background: var(--ac-white);
}

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

#article .card:hover {
    box-shadow: var(--ac-shadow);
}

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

.za0616thumb-home {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

/* —— 页脚 —— */
.za0616footer {
    background: var(--ac-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 3rem 0 1.5rem;
}

.za0616footer-title {
    color: var(--ac-accent-light);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.za0616footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.za0616footer-links li {
    margin-bottom: 0.5rem;
}

.za0616footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.za0616footer-link:hover {
    color: var(--ac-white);
}

.za0616footer p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
}

.za0616friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.za0616friend-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.88rem;
}

.za0616footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 1.25rem;
    margin-top: 2rem;
    text-align: center;
}

.za0616footer-bottom a {
    color: rgba(255, 255, 255, 0.75);
}

.za0616footer-bottom a:hover {
    color: var(--ac-accent-light);
}

/* —— 列表/内页 —— */
.za0616page-main {
    padding: 2.5rem 0 3rem;
    background: var(--ac-surface);
    min-height: 50vh;
}

.za0616page-main .card {
    border: 1px solid var(--ac-border);
    border-radius: var(--ac-radius-lg);
    overflow: hidden;
}

.za0616page-main .card-body {
    padding: 1.25rem 1.5rem;
}

.za0616article-content {
    line-height: 1.75;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.za0616article-content img {
    max-width: 100%;
    height: auto;
}

.za0616thumb-list,
.za0616thumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: 8px;
}

.za0616thumb-side-wrap {
    width: 72px;
    flex: 0 0 72px;
}

.za0616thumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    border-radius: 6px;
}

.za0616thumb-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;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

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

/* —— 响应式 —— */
@media (max-width: 991px) {
    .ac-bento-item.span-4,
    .ac-bento-item.span-6,
    .ac-bento-item.span-8 {
        grid-column: span 6;
    }

    .ac-knowledge-grid {
        grid-template-columns: 1fr;
    }

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

    .za0616security-section .row > [class*="col-lg-3"] {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

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

    .za0616hero-section {
        padding: 2.5rem 0;
        text-align: center;
    }

    .za0616hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .za0616hero-buttons {
        justify-content: center;
    }

    .za0616hero-buttons .btn {
        width: 100%;
        max-width: 320px;
    }

    .za0616hero-image {
        max-width: 220px;
        margin: 1.5rem auto 0;
    }

    .ac-bento {
        grid-template-columns: 1fr;
    }

    .ac-bento-item.span-4,
    .ac-bento-item.span-6,
    .ac-bento-item.span-8,
    .ac-bento-item.span-12 {
        grid-column: span 1;
    }

    .ac-faq-grid {
        grid-template-columns: 1fr;
    }

    .za0616download-card .d-flex.align-items-center {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .za0616download-card .d-flex.align-items-center .ms-3 {
        margin-left: 0 !important;
    }

    .za0616download-action .btn {
        width: 100%;
        white-space: normal;
    }

    .za0616security-section .row > [class*="col-lg-3"],
    .za0616security-section .row > [class*="col-md-6"] {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .za0616footer .row > [class*="col-md-3"] {
        text-align: center;
        margin-bottom: 1.5rem;
    }

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

    .za0616thumb-home {
        height: 96px !important;
    }

    #article h3.h5 {
        font-size: 0.92rem;
        line-height: 1.35;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

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

    .za0616thumb-list,
    .za0616thumb-related {
        height: 72px !important;
    }

    .za0616page-main .card-body {
        padding: 1rem;
    }
}

@media (max-width: 575px) {
    .za0616navbar-brand img {
        height: 36px;
    }

    #article .row-cols-md-2 {
        --bs-columns: 1;
    }

    .za0616thumb-cover {
        max-height: 200px;
    }

    .za0616thumb-list,
    .za0616thumb-related {
        height: 64px !important;
    }
}