:root {
    --primary-color: #0F766E;
    --secondary-color: #134E4A;
    --accent-color: #EA580C;
    --accent-dark: #C2410C;
    --text-color: #1C1917;
    --text-muted: #57534E;
    --light-bg: #F4F7F6;
    --surface: #FFFFFF;
    --dark-bg: #042F2E;
    --hero-bg: #022C22;
    --gray-100: #FAFAF9;
    --gray-200: #E7E5E4;
    --gray-300: #D6D3D1;
    --gray-600: #78716C;
    --gray-700: #44403C;
    --gray-800: #292524;
    --gray-900: #1C1917;
    --transition-speed: 0.25s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 3px rgba(15, 118, 110, 0.08);
    --shadow-md: 0 8px 24px rgba(4, 47, 46, 0.12);
    --shadow-lg: 0 16px 40px rgba(4, 47, 46, 0.14);
    --card-border: 1px solid rgba(15, 118, 110, 0.12);
    --card-border-dark: 1px solid rgba(255, 255, 255, 0.12);
    --card-padding: 1.5rem;
    --section-padding: 72px;
    --inner-gap: 1rem;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', system-ui, sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background: var(--gray-100);
    overflow-x: hidden;
}

.z1d646container.container {
    max-width: 1140px;
}

.z1d646row.row > [class*="col"] {
    min-width: 0;
}

.z1d646about-card,
.z1d646feature-card,
.z1d646stat-item,
.z1d646download-card,
.z1d646security-card,
.z1d646certificate-card,
.z1d646faq-item,
.z1d646pro-card,
.z1d646about-panel {
    border: var(--card-border);
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z1d646article-section .z1d646article-card.card {
    border: var(--card-border) !important;
    border-radius: var(--radius-md) !important;
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z1d646section-header {
    margin-bottom: 2.5rem;
}

.z1d646section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin: 0.65rem 0 0.5rem;
    letter-spacing: -0.02em;
}

.z1d646section-tag {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: rgba(15, 118, 110, 0.1);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 999px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.z1d646section-tag.z1d646tag-light {
    background: rgba(234, 88, 12, 0.15);
    color: #FDBA74;
}

.z1d646section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.85;
}

.z1d646section-desc.z1d646desc-light {
    color: rgba(255, 255, 255, 0.78);
}

/* ===== 导航 ===== */
.z1d646navbar {
    background: rgba(250, 250, 249, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(15, 118, 110, 0.1);
    padding: 0.75rem 0;
    padding-top: max(0.75rem, env(safe-area-inset-top));
    position: sticky;
    top: 0;
    z-index: 1000;
}

.z1d646navbar-brand img {
    height: 44px;
}

.z1d646nav-link {
    color: var(--gray-800) !important;
    font-weight: 600;
    padding: 0.5rem 0.85rem !important;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    transition: color var(--transition-speed), background var(--transition-speed);
}

.z1d646nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(15, 118, 110, 0.06);
}

/* ===== 英雄区 ===== */
.z1d646hero-section {
    background: var(--hero-bg);
    color: #fff;
    padding: 4rem 0 4.5rem;
    position: relative;
    overflow: hidden;
}

.z1d646hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 90% 70% at 10% 20%, rgba(15, 118, 110, 0.45) 0%, transparent 55%),
        radial-gradient(ellipse 60% 50% at 90% 10%, rgba(234, 88, 12, 0.12) 0%, transparent 45%),
        linear-gradient(165deg, #022c22 0%, #0f172a 100%);
    pointer-events: none;
}

.z1d646hero-content {
    position: relative;
    z-index: 2;
}

.z1d646hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 1.25rem;
}

.z1d646hero-badge i {
    color: var(--accent-color);
}

.z1d646hero-title {
    font-size: 2.85rem;
    font-weight: 800;
    margin-bottom: 0.85rem;
    line-height: 1.12;
    letter-spacing: -0.03em;
    background: linear-gradient(120deg, #fff 0%, #ccfbf1 55%, #fed7aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.z1d646hero-subtitle {
    font-size: 1.12rem;
    margin-bottom: 0.85rem;
    opacity: 0.92;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.92);
}

.z1d646hero-desc {
    font-size: 0.92rem;
    opacity: 0.82;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    max-width: 100%;
}

.z1d646hero-desc strong {
    color: #5eead4;
    font-weight: 600;
}

.z1d646hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
}

.z1d646hero-stat-num {
    font-size: 1.45rem;
    font-weight: 800;
    color: #fdba74;
}

.z1d646hero-stat-label {
    font-size: 0.78rem;
    opacity: 0.65;
    margin-top: 0.15rem;
}

.z1d646hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.z1d646hero-buttons .btn {
    padding: 0.72rem 1.35rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.z1d646hero-buttons .btn-light {
    background: #fff;
    color: var(--primary-color);
    border: none;
}

.z1d646hero-buttons .btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
}

.z1d646hero-buttons .btn-primary,
.z1d646btn-download {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    border: none;
    color: #fff;
}

.z1d646hero-buttons .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(234, 88, 12, 0.35);
}

.z1d646hero-buttons .btn-outline-light {
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: #fff;
    background: transparent;
}

.z1d646hero-buttons .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.55);
}

.z1d646hero-aside {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
    position: relative;
    z-index: 2;
}

.z1d646hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

.z1d646hero-glow {
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.35) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(36px);
    pointer-events: none;
}

.z1d646hero-image {
    width: 100%;
    max-width: 260px;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    object-fit: contain;
}

.z1d646hero-mini-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.65rem;
}

.z1d646hero-mini {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 0.85rem 0.75rem;
    text-align: left;
}

.z1d646hero-mini i {
    color: var(--accent-color);
    font-size: 1.15rem;
    display: block;
    margin-bottom: 0.35rem;
}

.z1d646hero-mini span {
    font-weight: 700;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.95);
    display: block;
}

.z1d646hero-mini small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.68rem;
    line-height: 1.35;
    color: rgba(255, 255, 255, 0.62);
}

/* ===== 关于 / 产品条 ===== */
.z1d646about-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z1d646product-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 0.6rem;
    margin-bottom: 2.25rem;
}

.z1d646pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.42rem 1rem;
    background: var(--light-bg);
    border: 1px solid rgba(15, 118, 110, 0.12);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gray-800);
    white-space: nowrap;
}

.z1d646pill i {
    color: var(--primary-color);
    font-size: 0.95rem;
}

.z1d646about-panel {
    background: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    height: 100%;
}

.z1d646about-panel-title {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.z1d646about-panel p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    line-height: 1.85;
    font-size: 0.95rem;
}

.z1d646about-panel p:last-child {
    margin-bottom: 0;
}

.z1d646about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--inner-gap);
}

.z1d646about-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    height: 100%;
}

.z1d646about-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.z1d646about-card-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.z1d646about-card h4 {
    font-size: 0.98rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    color: var(--gray-900);
}

.z1d646about-card p {
    font-size: 0.84rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

/* ===== 特点 ===== */
.z1d646features-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z1d646feature-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border: var(--card-border);
}

.z1d646feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(15, 118, 110, 0.18);
}

.z1d646feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(15, 118, 110, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.z1d646feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--gray-900);
}

.z1d646feature-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.75;
}

.z1d646feature-card p strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== 统计 ===== */
.z1d646stats-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(145deg, #042f2e 0%, #134e4a 40%, #0f172a 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.z1d646stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='48' height='48' viewBox='0 0 48 48' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0h24v24H0V0zm24 24h24v24H24V24z' fill='%23ffffff' fill-opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
}

.z1d646stats-header h2 {
    color: #fff;
}

.z1d646stat-item {
    text-align: center;
    padding: 1.15rem 0.75rem;
    background: rgba(255, 255, 255, 0.06);
    border: var(--card-border-dark);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-speed), transform var(--transition-speed);
}

.z1d646stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.18);
}

.z1d646stat-icon {
    font-size: 1.4rem;
    color: #fdba74;
    margin-bottom: 0.6rem;
}

.z1d646stat-number {
    font-size: 1.85rem;
    font-weight: 800;
    line-height: 1.15;
    color: #fff;
    margin-bottom: 0.2rem;
}

.z1d646stat-label {
    font-size: 0.82rem;
    opacity: 0.72;
    line-height: 1.35;
    max-width: 12rem;
}

/* ===== 专业条 ===== */
.z1d646pro-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, #ecfdf5 0%, var(--light-bg) 100%);
}

.z1d646pro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.15rem;
}

.z1d646pro-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
}

.z1d646pro-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(15, 118, 110, 0.16);
}

.z1d646pro-card h3 {
    font-size: 1rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 0.65rem;
}

.z1d646pro-card h3 i {
    color: var(--primary-color);
}

.z1d646pro-card p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.75;
}

/* ===== 注册 ===== */
.z1d646register-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z1d646register-wrap {
    background: linear-gradient(135deg, #fff 0%, var(--light-bg) 100%);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    border: var(--card-border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.z1d646register-wrap h2 {
    font-size: 1.65rem;
    font-weight: 800;
    margin: 0.65rem 0 0.85rem;
    color: var(--gray-900);
}

.z1d646register-desc {
    color: var(--text-muted);
    line-height: 1.85;
    margin-bottom: 1.75rem;
    font-size: 0.95rem;
}

.z1d646register-desc strong {
    color: var(--primary-color);
}

.z1d646register-steps {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.z1d646step-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.z1d646step-num {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.8rem;
}

.z1d646step-content {
    flex: 1;
    min-width: 0;
}

.z1d646step-content h4 {
    font-size: 0.98rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--gray-900);
}
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
}

.z1d646register-cta {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: none;
    border: none;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.z1d646register-icon {
    font-size: 2.75rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.z1d646register-cta h3 {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 0.4rem;
}

.z1d646register-cta p {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    font-size: 0.88rem;
    text-align: center;
}

/* ===== 下载 ===== */
.z1d646download-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z1d646download-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    height: 100%;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.z1d646download-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.z1d646download-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.z1d646download-card-header > div:last-child {
    flex: 1;
    min-width: 0;
}

.z1d646download-card-header h3 {
    font-size: 1.08rem;
    font-weight: 800;
    margin: 0;
    color: var(--gray-900);
    line-height: 1.3;
}

.z1d646platform-sub {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0.2rem 0 0;
}

.z1d646platform-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.z1d646pc-icon {
    background: linear-gradient(135deg, #0369a1, #0c4a6e);
    color: #fff;
}

.z1d646android-icon {
    background: linear-gradient(135deg, #16a34a, #14532d);
    color: #fff;
}

.z1d646download-info {
    background: var(--light-bg);
    padding: 0.95rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.1rem;
    flex-grow: 1;
    border: 1px solid rgba(15, 118, 110, 0.08);
}

.z1d646info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    margin-bottom: 0.55rem;
    font-size: 0.88rem;
    color: var(--gray-700);
}

.z1d646info-item:last-child {
    margin-bottom: 0;
}

.z1d646info-item i {
    color: var(--primary-color);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z1d646download-action .btn {
    width: 100%;
    padding: 0.72rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.z1d646download-action .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 118, 110, 0.28);
}

.z1d646download-note {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding: 1rem 1.15rem;
    background: rgba(234, 88, 12, 0.06);
    border: var(--card-border);
    border-radius: var(--radius-md);
}

.z1d646download-note i {
    color: var(--accent-dark);
    font-size: 1.15rem;
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.z1d646download-note p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.75;
}

/* ===== 安全 ===== */
.z1d646security-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z1d646security-card {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    height: 100%;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.z1d646security-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.z1d646security-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
}

.z1d646security-card h3 {
    font-size: 1rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.z1d646security-features {
    background: var(--surface);
    padding: 0.95rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(15, 118, 110, 0.08);
}

.z1d646feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.82rem;
    color: var(--gray-700);
}

.z1d646feature-item:last-child {
    margin-bottom: 0;
}

.z1d646feature-item i {
    color: var(--primary-color);
    margin-top: 0.12rem;
    flex-shrink: 0;
}

.z1d646security-certificates {
    margin-top: 2.25rem;
}

.z1d646certificate-card {
    background: var(--light-bg);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    text-align: center;
    height: 100%;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.z1d646certificate-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.z1d646certificate-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 0.85rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    color: #fff;
}

.z1d646certificate-card h4 {
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
    color: var(--gray-900);
}

.z1d646certificate-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.55;
}

/* ===== FAQ ===== */
.z1d646faq-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z1d646faq-item {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-speed);
}

.z1d646faq-item:hover {
    box-shadow: var(--shadow-md);
}

.z1d646faq-q {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 0.6rem;
}

.z1d646faq-q i {
    color: var(--accent-dark);
    font-size: 1.1rem;
    margin-top: 0.08rem;
    flex-shrink: 0;
}

.z1d646faq-q h5 {
    font-size: 0.95rem;
    font-weight: 800;
    margin: 0;
    color: var(--gray-900);
    line-height: 1.4;
}

.z1d646faq-item p {
    font-size: 0.87rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.75;
    padding-left: 1.75rem;
}

.z1d646faq-item p strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== 文章 ===== */
.z1d646article-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z1d646article-section .z1d646row {
    --bs-gutter-x: 0.75rem;
    --bs-gutter-y: 0.75rem;
}

.z1d646article-card {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 0;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.z1d646article-card .card-body {
    padding: 0.85rem;
}

.z1d646article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.z1d646article-thumb-wrap {
    overflow: hidden;
}

.z1d646thumb-home {
    height: 118px;
    object-fit: cover;
    width: 100%;
    transition: transform var(--transition-speed);
}

.z1d646article-card:hover .z1d646thumb-home {
    transform: scale(1.04);
}

.z1d646article-meta {
    margin-bottom: 0.4rem;
    font-size: 0.78rem;
}

.z1d646article-title {
    font-size: 0.92rem;
    line-height: 1.45;
    margin: 0;
    font-weight: 700;
}

.z1d646article-title a {
    color: var(--gray-900);
    transition: color var(--transition-speed);
}

.z1d646article-title a:hover {
    color: var(--primary-color);
}

.z1d646btn-more {
    border-color: var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-weight: 700;
    white-space: nowrap;
}

.z1d646btn-more:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

/* ===== 按钮 ===== */
.btn {
    padding: 0.62rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    white-space: normal;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(15, 118, 110, 0.25);
}

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

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

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

/* ===== 页脚 ===== */
.z1d646footer {
    background: linear-gradient(180deg, #0f172a 0%, #022c22 100%);
    padding: 3.5rem 0 2rem;
    color: rgba(255, 255, 255, 0.72);
}

.z1d646footer-title {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.z1d646footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z1d646footer-links li {
    margin-bottom: 0.5rem;
}

.z1d646footer-link {
    color: rgba(255, 255, 255, 0.58);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition-speed);
}

.z1d646footer-link:hover {
    color: #fdba74;
}

.z1d646footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.35rem;
    color: rgba(255, 255, 255, 0.45);
    font-size: 0.86rem;
}

.z1d646footer-bottom a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
}

.z1d646footer-bottom a:hover {
    color: #fdba74;
}

.z1d646friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.9rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z1d646friend-links li {
    margin: 0;
}

.z1d646friend-links a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    font-size: 0.86rem;
    word-break: break-all;
    transition: color var(--transition-speed);
}

.z1d646friend-links a:hover {
    color: #fdba74;
}

.z1d646footer-bottom p {
    line-height: 1.75;
    word-break: break-word;
}

/* ===== 通用 ===== */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

.z1d646hero-content,
.z1d646feature-card,
.z1d646download-card,
.z1d646faq-item {
    animation: fadeIn 0.55s var(--transition-easing) forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
}

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

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(15, 118, 110, 0.2);
}

.navbar-toggler {
    border: none;
    padding: 0.45rem;
}

.navbar-collapse {
    background: #fff;
    padding: 0.85rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-top: 0.35rem;
}

@media (min-width: 1200px) {
    .container { max-width: 1140px; }
    .z1d646hero-title { font-size: 3.1rem; }
}

@media (max-width: 991px) {
    :root { --section-padding: 56px; --card-padding: 1.25rem; }

    .z1d646hero-section { padding: 3rem 0 3.25rem; }
    .z1d646hero-section .row { --bs-gutter-y: 1.75rem; }
    .z1d646hero-title { font-size: 2.35rem; }
    .z1d646hero-mini-grid { grid-template-columns: 1fr; }
    .z1d646hero-aside { margin-top: 0.25rem; }
    .z1d646about-grid { grid-template-columns: 1fr 1fr; }
    .z1d646pro-grid { grid-template-columns: 1fr; }
    .z1d646register-wrap { padding: 1.5rem; }
    .z1d646register-wrap h2 { font-size: 1.45rem; }
    .z1d646section-header h2 { font-size: 1.65rem; }
    .z1d646footer { text-align: center; }
}

@media (max-width: 767px) {
    :root { --section-padding: 48px; --card-padding: 1.1rem; }

    .z1d646navbar { padding: 0.5rem 0; }
    .z1d646navbar-brand img { height: 38px; }
    .z1d646navbar .navbar-collapse {
        max-height: min(72vh, 520px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        width: 100%;
    }
    .z1d646navbar .container { padding-left: 12px; padding-right: 12px; }
    .z1d646navbar .navbar-nav .nav-link {
        padding: 0.65rem 0.5rem !important;
        font-size: 0.9rem;
        line-height: 1.35;
        white-space: normal;
        word-break: break-word;
    }

    .z1d646hero-section { padding: 2rem 0 2.5rem; }
    .z1d646hero-section .row { --bs-gutter-y: 1.25rem; }
    .z1d646hero-badge {
        max-width: 100%;
        flex-wrap: wrap;
        font-size: 0.78rem;
        padding: 0.35rem 0.85rem;
        line-height: 1.45;
    }
    .z1d646hero-title { font-size: 1.8rem; line-height: 1.18; }
    .z1d646hero-subtitle { font-size: 0.94rem; margin-bottom: 0.65rem; }
    .z1d646hero-desc { font-size: 0.85rem; margin-bottom: 1.1rem; line-height: 1.75; }
    .z1d646hero-stats {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.4rem;
        margin-bottom: 1.25rem;
    }
    .z1d646hero-stat { text-align: center; align-items: center; min-width: 0; }
    .z1d646hero-stat-num { font-size: 1.05rem; line-height: 1.2; }
    .z1d646hero-stat-label { font-size: 0.65rem; line-height: 1.25; }
    .z1d646hero-buttons { flex-direction: column; gap: 0.5rem; }
    .z1d646hero-buttons .btn {
        width: 100%;
        justify-content: center;
        font-size: 0.9rem;
        padding: 0.65rem 1rem;
    }
    .z1d646hero-buttons .btn-lg { font-size: 0.92rem; }
    .z1d646hero-visual { min-height: auto; padding: 0.85rem; }
    .z1d646hero-image { max-width: 220px; margin: 0 auto; }
    .z1d646hero-mini { padding: 0.75rem 0.65rem; }
    .z1d646hero-mini span { font-size: 0.78rem; }
    .z1d646hero-mini small { font-size: 0.65rem; }

    .z1d646product-pills {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        gap: 0.45rem;
        margin-left: -4px;
        margin-right: -4px;
        padding-left: 4px;
        padding-right: 4px;
        padding-bottom: 0.4rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }
    .z1d646pill { flex-shrink: 0; font-size: 0.78rem; padding: 0.38rem 0.85rem; }

    .z1d646section-header { margin-bottom: 1.35rem; }
    .z1d646section-header h2 { font-size: 1.32rem; line-height: 1.3; }
    .z1d646section-tag { font-size: 0.72rem; padding: 0.3rem 0.8rem; letter-spacing: 0.02em; }
    .z1d646section-desc { font-size: 0.88rem; padding: 0; line-height: 1.72; }

    .z1d646about-grid { grid-template-columns: 1fr; gap: 0.65rem; }
    .z1d646about-panel { padding: 1.2rem; }
    .z1d646about-panel-title { font-size: 1.05rem; }

    .z1d646features-section .row { --bs-gutter-y: 0.65rem; }
    .z1d646feature-card { padding: var(--card-padding); }
    .z1d646feature-card h3 { font-size: 0.98rem; }
    .z1d646feature-card p { font-size: 0.84rem; }

    .z1d646stat-number { font-size: 1.28rem; }
    .z1d646stat-label { font-size: 0.72rem; max-width: none; }
    .z1d646stat-item { padding: 1rem 0.5rem; }
    .z1d646stats-section .row { --bs-gutter-y: 0.6rem; --bs-gutter-x: 0.6rem; }

    .z1d646pro-section .z1d646pro-grid { gap: 0.75rem; }
    .z1d646pro-card { padding: var(--card-padding); }
    .z1d646pro-card h3 { font-size: 0.95rem; line-height: 1.35; }
    .z1d646pro-card p { font-size: 0.84rem; }

    .z1d646register-section .row { --bs-gutter-y: 0.85rem; }
    .z1d646register-wrap { padding: 1.15rem; }
    .z1d646register-wrap h2 { font-size: 1.22rem; line-height: 1.3; }
    .z1d646register-desc { font-size: 0.88rem; margin-bottom: 1.25rem; }
    .z1d646register-steps { gap: 0.95rem; }
    .z1d646register-cta {
        height: auto;
        margin-top: 0.25rem;
        padding: 1.15rem 0.95rem;
    }
    .z1d646register-cta .btn { width: 100%; }

    .z1d646download-section .row { --bs-gutter-y: 0.65rem; }
    .z1d646download-card { padding: var(--card-padding); }
    .z1d646download-card-header { gap: 0.65rem; margin-bottom: 1rem; }
    .z1d646download-card-header h3 { font-size: 0.98rem; }
    .z1d646platform-sub { font-size: 0.78rem; }
    .z1d646platform-icon { width: 42px; height: 42px; font-size: 1.1rem; }
    .z1d646download-info { padding: 0.85rem; margin-bottom: 1rem; }
    .z1d646info-item { font-size: 0.82rem; }
    .z1d646download-note {
        margin-top: 1.15rem;
        padding: 0.85rem 1rem;
        flex-wrap: wrap;
    }
    .z1d646download-note p { font-size: 0.82rem; }

    .z1d646security-section .row.g-4 { --bs-gutter-y: 0.65rem; }
    .z1d646security-card { padding: 1.05rem; }
    .z1d646security-icon { width: 44px; height: 44px; font-size: 1.05rem; margin-bottom: 0.85rem; }
    .z1d646security-card h3 { font-size: 0.92rem; margin-bottom: 0.75rem; }
    .z1d646security-features { padding: 0.8rem; }
    .z1d646certificate-card { padding: 1.05rem; }
    .z1d646security-certificates .row { --bs-gutter-y: 0.65rem; }

    .z1d646faq-section .row { --bs-gutter-y: 0.65rem; }
    .z1d646faq-item { padding: var(--card-padding); }
    .z1d646faq-q h5 { font-size: 0.9rem; word-break: break-word; }
    .z1d646faq-item p { padding-left: 0; margin-top: 0.4rem; font-size: 0.84rem; }

    .z1d646article-header {
        flex-direction: column;
        align-items: stretch !important;
        gap: 0.6rem !important;
        margin-bottom: 1rem;
    }
    .z1d646article-header .z1d646btn-more { width: 100%; }
    .z1d646thumb-home { height: 102px !important; }
    #article .card-body { padding: 0.7rem; }
    .z1d646article-title {
        font-size: 0.88rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .z1d646article-meta { font-size: 0.72rem; }

    .z1d646footer { padding: 2.25rem 0 1.35rem; }
    .z1d646footer-brand { display: block; text-align: center; }
    .z1d646footer > .container > .row:first-child > [class*="col"] { margin-bottom: 1.25rem !important; }
    .z1d646footer-title { text-align: center; font-size: 0.9rem; }
    .z1d646footer-links { text-align: center; }
    .z1d646friend-links { justify-content: center; }
    .z1d646footer p { font-size: 0.86rem; }
}

@media (min-width: 576px) and (max-width: 767px) {
    .z1d646thumb-home { height: 92px !important; }
}

@media (max-width: 575px) {
    :root { --section-padding: 36px; --card-padding: 1rem; }

    .z1d646container.container {
        padding-left: max(12px, env(safe-area-inset-left));
        padding-right: max(12px, env(safe-area-inset-right));
    }

    .z1d646hero-title { font-size: 1.55rem; }
    .z1d646hero-stat-num { font-size: 0.98rem; }
    .z1d646hero-stat-label { font-size: 0.62rem; }

    .z1d646section-header h2 { font-size: 1.18rem; }
    .z1d646section-tag {
        font-size: 0.68rem;
        padding: 0.28rem 0.72rem;
        text-transform: none;
    }

    .z1d646register-wrap { padding: 1rem; }
    .z1d646register-wrap h2 { font-size: 1.12rem; }
    .z1d646step-item { gap: 0.75rem; }
    .z1d646step-num { width: 34px; height: 34px; font-size: 0.7rem; }
    .z1d646step-content h4 { font-size: 0.92rem; }
    .z1d646step-content p { font-size: 0.82rem; }

    .z1d646stat-item { padding: 0.85rem 0.35rem; }
    .z1d646stat-number { font-size: 1.08rem; }
    .z1d646stat-label { font-size: 0.68rem; }

    .z1d646thumb-home { height: 108px !important; }
    .z1d646article-card .card-body { padding: 0.62rem; }

    .z1d646navbar .navbar-nav .nav-link {
        font-size: 0.86rem;
        padding: 0.58rem 0.4rem !important;
    }

    .z1d646footer-brand img { height: 32px; }
    .z1d646footer-bottom { font-size: 0.78rem; padding-top: 1.1rem; }
    .z1d646footer-bottom p { font-size: 0.78rem; line-height: 1.65; }
}

/* ===== 列表页/内容页样式保留 ===== */
.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;
}

.listbox .e2 li {
    padding-bottom: 0.75rem;
    margin-bottom: 0.75rem;
}

@media (max-width: 767px) {
    .listbox .e2 li {
        padding-bottom: 0.75rem !important;
        margin-bottom: 0.75rem !important;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
        margin-bottom: 0.35rem;
        line-height: 1.35;
    }

    .listbox .e2 li p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .z1d646thumb-list,
    .z1d646thumb-related { height: 72px !important; }
    .z1d646thumb-side { height: 50px !important; }
    .z1d646thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        margin: 0 auto;
    }
}

@media (max-width: 575px) {
    .z1d646thumb-list,
    .z1d646thumb-related { height: 64px !important; }
    .z1d646thumb-side { height: 46px !important; }
    .z1d646thumb-cover { height: 150px !important; }
    .pagebar .pagelist { gap: 0.35rem; }
}

.listbox .card,
.listbox .z1d646article-card { margin-bottom: 1rem; }

#article .z1d646article-card { margin-bottom: 0; }

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.form-control { width: 100%; }

.modal-dialog { margin: 1rem auto; }

@media (max-width: 575px) {
    .modal-dialog { margin: 0.5rem; }
}