:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent-color: #10b981;
    --accent-dark: #059669;
    --highlight-color: #f59e0b;
    --text-color: #1e1b4b;
    --text-muted: #64748b;
    --light-bg: #faf9ff;
    --surface: #ffffff;
    --dark-bg: #0f0a1e;
    --dark-surface: #1a1230;
    --border-color: rgba(99, 102, 241, 0.14);
    --border-width: 1px;
    --shadow-sm: 0 2px 8px rgba(15, 10, 30, 0.06);
    --shadow-md: 0 8px 30px rgba(99, 102, 241, 0.12);
    --shadow-lg: 0 20px 60px rgba(15, 10, 30, 0.15);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 16px;
    --card-padding: 1.5rem;
    --card-padding-sm: 1.25rem;
    --grid-gap: 1.25rem;
    --section-padding-y: clamp(64px, 8vw, 96px);
    --transition-speed: 0.3s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background: var(--light-bg);
    overflow-x: hidden;
}

.z55c3ccontainer.container {
    max-width: 1140px;
    padding-left: 1rem;
    padding-right: 1rem;
}

.z55c3ccontainer.container .row {
    --bs-gutter-x: 1.5rem;
    margin-left: calc(var(--bs-gutter-x) * -0.5);
    margin-right: calc(var(--bs-gutter-x) * -0.5);
}

/* 统一卡片边框 */
.z55c3ccard-base {
    background: var(--surface);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 72px;
}

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

/* ========== 导航栏 ========== */
.z55c3cnavbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.z55c3cnavbar-brand img {
    height: 42px;
}

.z55c3cnav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed) var(--transition-easing);
}

.z55c3cnav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(99, 102, 241, 0.08);
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
}

@media (max-width: 991.98px) {
    .z55c3cnavbar .navbar-collapse {
        background: white;
        padding: 0.75rem;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-md);
        margin-top: 0.5rem;
    }
}

@media (min-width: 992px) {
    .z55c3cnavbar .navbar-collapse {
        background: transparent;
        padding: 0;
        box-shadow: none;
    }
}

/* ========== 通用组件 ========== */
.z55c3csection-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.9rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}

.z55c3csection-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.25;
    margin-bottom: 1rem;
}

.z55c3csection-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.75;
}

.z55c3csection-header {
    text-align: center;
    margin-bottom: 2.75rem;
    padding: 0 0.5rem;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-easing);
    position: relative;
    overflow: hidden;
}

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

/* ========== 英雄区域 ========== */
.z55c3chero-section {
    background: linear-gradient(145deg, var(--dark-bg) 0%, #1e1040 45%, #2d1b69 100%);
    color: white;
    padding: clamp(56px, 9vw, 100px) 0 clamp(64px, 10vw, 110px);
    position: relative;
    overflow: hidden;
}

.z55c3chero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 70%;
    height: 140%;
    background: radial-gradient(ellipse, rgba(99, 102, 241, 0.25) 0%, transparent 70%);
    pointer-events: none;
}

.z55c3chero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 50%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.z55c3chero-content {
    position: relative;
    z-index: 2;
}

.z55c3chero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(8px);
}

.z55c3chero-badge i {
    color: var(--accent-color);
}

.z55c3chero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1.25rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.z55c3chero-title span {
    background: linear-gradient(90deg, var(--accent-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.z55c3chero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 2rem;
    opacity: 0.88;
    line-height: 1.8;
    max-width: 540px;
}

.z55c3chero-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.z55c3chero-highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.z55c3chero-highlight-item i {
    color: var(--accent-color);
    font-size: 0.85rem;
}

.z55c3chero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.z55c3chero-buttons .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    border-radius: 12px;
    font-weight: 600;
}

.z55c3chero-buttons .btn-light {
    background: white;
    color: var(--primary-dark);
    border: none;
}

.z55c3chero-buttons .btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
    background: white;
    color: var(--primary-dark);
}

.z55c3chero-buttons .btn-accent {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
    color: white;
    border: none;
}

.z55c3chero-buttons .btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
    color: white;
}

.z55c3chero-buttons .btn-outline-light {
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    color: white;
    background: transparent;
}

.z55c3chero-buttons .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    transform: translateY(-2px);
}

.z55c3chero-visual {
    position: relative;
    z-index: 2;
}

.z55c3chero-image-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1rem;
    min-height: 320px;
    overflow: hidden;
    max-width: 100%;
}

.z55c3chero-image {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: contain;
    margin: 0 auto;
}

.z55c3chero-image-shadow {
    display: none;
}

.z55c3chero-float-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    box-shadow: var(--shadow-sm);
    color: var(--text-color);
    font-size: 0.78rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 148px;
    line-height: 1.4;
    animation: floatCard 4s ease-in-out infinite;
    z-index: 3;
}

.z55c3chero-float-card i {
    color: var(--accent-color);
    font-size: 0.95rem;
    flex-shrink: 0;
}

.z55c3chero-float-card.card-1 {
    top: 8%;
    left: 4%;
}

.z55c3chero-float-card.card-2 {
    bottom: 12%;
    right: 4%;
    animation-delay: 1.5s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ========== 信任条 ========== */
.z55c3ctrust-bar {
    background: var(--surface);
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 1.25rem 0;
}

.z55c3ctrust-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem 1.5rem;
    align-items: center;
}

.z55c3ctrust-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: left;
    min-width: 0;
}

.z55c3ctrust-item span {
    line-height: 1.4;
}

.z55c3ctrust-item i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* ========== 平台介绍 ========== */
.z55c3cabout-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
}

.z55c3cabout-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: start;
}

.z55c3cabout-content p {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    font-size: 1rem;
    line-height: 1.85;
}

.z55c3cabout-content p:last-child {
    margin-bottom: 0;
}

.z55c3cabout-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--grid-gap);
    align-items: stretch;
}

.z55c3cabout-mini-card {
    background: var(--surface);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding-sm);
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    display: flex;
    flex-direction: column;
    min-height: 130px;
}

.z55c3cabout-mini-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.z55c3cabout-mini-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.z55c3cabout-mini-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    color: var(--text-color);
}

.z55c3cabout-mini-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

/* ========== Bento 特点区域 ========== */
.z55c3cfeatures-section {
    padding: var(--section-padding-y) 0;
    background: var(--surface);
}

.z55c3cbento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--grid-gap);
    align-items: stretch;
}

.z55c3cbento-item {
    background: var(--light-bg);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    transition: all var(--transition-speed) var(--transition-easing);
    overflow: hidden;
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.z55c3cbento-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.z55c3cbento-item.span-4 { grid-column: span 4; }
.z55c3cbento-item.span-6 { grid-column: span 6; }
.z55c3cbento-item.span-8 { grid-column: span 8; }
.z55c3cbento-item.span-12 { grid-column: span 12; }

.z55c3cbento-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 1.25rem;
}

.z55c3cbento-icon.purple {
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary-color);
}

.z55c3cbento-icon.green {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-color);
}

.z55c3cbento-icon.amber {
    background: rgba(245, 158, 11, 0.12);
    color: var(--highlight-color);
}

.z55c3cbento-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-color);
}

.z55c3cbento-item p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin: 0;
    line-height: 1.7;
}

.z55c3cbento-item.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: var(--border-width) solid transparent;
}

.z55c3cbento-item.featured h3,
.z55c3cbento-item.featured p {
    color: rgba(255, 255, 255, 0.92);
}

.z55c3cbento-item.featured .z55c3cbento-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* ========== 注册指南 ========== */
.z55c3cguide-section {
    padding: var(--section-padding-y) 0;
    background: linear-gradient(180deg, var(--light-bg) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.z55c3csteps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
    position: relative;
    align-items: stretch;
}

.z55c3cstep-card {
    background: var(--surface);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    text-align: center;
    position: relative;
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.z55c3cstep-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.z55c3cstep-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.z55c3cstep-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-color);
}

.z55c3cstep-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
    flex-grow: 1;
}

.z55c3cguide-cta {
    text-align: center;
    margin-top: 2.5rem;
}

/* ========== 统计数据 ========== */
.z55c3cstats-section {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #1e1040 100%);
    color: white;
    padding: clamp(48px, 6vw, 72px) 0;
    position: relative;
    overflow: hidden;
}

.z55c3cstats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.z55c3cstats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
    position: relative;
    z-index: 1;
    align-items: stretch;
}

.z55c3cstat-item {
    text-align: center;
    padding: 1.25rem 0.75rem;
    border: var(--border-width) solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    min-width: 0;
}

.z55c3cstat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(99, 102, 241, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.2rem;
    color: var(--primary-light);
}

.z55c3cstat-number {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 0.35rem;
    background: linear-gradient(90deg, white, var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.z55c3cstat-label {
    font-size: 0.95rem;
    opacity: 0.75;
}

/* ========== 下载区域 ========== */
.z55c3cdownload-section {
    padding: var(--section-padding-y) 0;
    background: var(--surface);
}

.z55c3cdownload-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
    align-items: stretch;
}

.z55c3cdownload-card {
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--light-bg);
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    overflow: hidden;
    min-width: 0;
}

.z55c3cdownload-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.z55c3cdownload-card .card-body {
    padding: var(--card-padding);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.z55c3cdownload-card-header {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1.25rem;
    min-width: 0;
}

.z55c3cdownload-card-header > div:last-child {
    min-width: 0;
    flex: 1;
}

.z55c3cplatform-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.z55c3cios-icon {
    background: linear-gradient(135deg, #007AFF, #0056b3);
    color: white;
}

.z55c3candroid-icon {
    background: linear-gradient(135deg, #3DDC84, #059669);
    color: white;
}

.z55c3cwindows-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.z55c3cdownload-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.z55c3cdownload-card .platform-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.z55c3cdownload-info {
    background: var(--surface);
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    flex-grow: 1;
    border: var(--border-width) solid var(--border-color);
}

.z55c3cinfo-item {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 0.7rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.z55c3cinfo-item:last-child {
    margin-bottom: 0;
}

.z55c3cinfo-item i {
    color: var(--accent-color);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z55c3cdownload-action {
    margin-top: auto;
}

.z55c3cdownload-action .btn {
    width: 100%;
    justify-content: center;
    display: inline-flex;
    align-items: center;
}

.z55c3cdownload-note {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08));
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    margin-top: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    overflow: hidden;
}

.z55c3cdownload-note-content {
    flex: 1;
    min-width: 0;
}

.z55c3cdownload-note-content h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.z55c3cdownload-note-content p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin: 0;
    line-height: 1.7;
}

.z55c3cqr-box {
    flex-shrink: 0;
    text-align: center;
}

.z55c3cqr-box img {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
    margin: 0 auto 0.5rem;
}

.z55c3cqr-box span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ========== 安全保障 ========== */
.z55c3csecurity-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
}

.z55c3csecurity-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
    align-items: stretch;
}

.z55c3csecurity-card {
    background: var(--surface);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    height: 100%;
    transition: all var(--transition-speed) var(--transition-easing);
    text-align: center;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.z55c3csecurity-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.z55c3csecurity-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.z55c3csecurity-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.z55c3csecurity-features {
    text-align: left;
    flex-grow: 1;
    background: var(--light-bg);
    padding: 0.85rem;
    border-radius: var(--radius-sm);
    border: var(--border-width) solid var(--border-color);
}

.z55c3cfeature-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.z55c3cfeature-item:last-child {
    margin-bottom: 0;
}

.z55c3cfeature-item i {
    color: var(--accent-color);
    flex-shrink: 0;
}

.z55c3csecurity-certificates {
    margin-top: 3rem;
}

.z55c3ccert-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
    align-items: stretch;
}

.z55c3ccertificate-card {
    background: var(--surface);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    text-align: center;
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 0;
}

.z55c3ccertificate-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.z55c3ccertificate-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin: 0 auto 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.z55c3ccertificate-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.4rem;
}

.z55c3ccertificate-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
}

/* ========== FAQ ========== */
.z55c3cfaq-section {
    padding: var(--section-padding-y) 0;
    background: var(--surface);
}

.z55c3cfaq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--grid-gap);
    max-width: 960px;
    margin: 0 auto;
    align-items: start;
}

.z55c3cfaq-item {
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--light-bg);
    transition: border-color var(--transition-speed);
    min-width: 0;
}

.z55c3cfaq-item:hover {
    border-color: var(--primary-light);
}

.z55c3cfaq-question {
    padding: 1rem 1.15rem;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
}

.z55c3cfaq-question i {
    color: var(--primary-color);
    transition: transform var(--transition-speed);
    flex-shrink: 0;
}

.z55c3cfaq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.z55c3cfaq-answer {
    padding: 0 1.15rem 1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.7;
    word-break: break-word;
}

/* ========== 文章板块 ========== */
.z55c3carticle-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
}

.z55c3carticle-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.z55c3carticle-header h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin: 0;
    color: var(--text-color);
}

.z55c3carticle-grid {
    --bs-gutter-x: var(--grid-gap);
    --bs-gutter-y: var(--grid-gap);
}

.z55c3carticle-grid .card {
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-speed) var(--transition-easing);
    background: var(--surface);
    height: 100%;
}

.z55c3carticle-grid .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.z55c3cthumb-home {
    height: 120px;
    object-fit: cover;
    width: 100%;
}

.z55c3carticle-grid .card-body {
    padding: 1rem;
}

.z55c3carticle-grid h3.h5 {
    font-size: 0.92rem;
    line-height: 1.45;
    margin-bottom: 0;
}

.z55c3carticle-grid h3.h5 a {
    color: var(--text-color);
}

.z55c3carticle-grid h3.h5 a:hover {
    color: var(--primary-color);
}

/* ========== 页脚 ========== */
.z55c3cfooter {
    background: var(--dark-bg);
    padding: 60px 0 30px;
    color: rgba(255, 255, 255, 0.7);
}

.z55c3cfooter-brand img {
    max-width: 100%;
    height: auto;
}

.z55c3cfooter p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    line-height: 1.7;
}

.z55c3cfooter-title {
    color: white;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.z55c3cfooter-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z55c3cfooter-links li {
    margin-bottom: 0.65rem;
}

.z55c3cfooter-link {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed);
}

.z55c3cfooter-link:hover {
    color: var(--primary-light);
}

.z55c3cfriend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z55c3cfriend-links a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-speed);
}

.z55c3cfriend-links a:hover {
    color: var(--primary-light);
}

.z55c3cfooter-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-top: 2rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

.z55c3cfooter-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.z55c3cfooter-bottom a:hover {
    color: var(--primary-light);
}

/* ========== 兼容旧类名 ========== */
.z55c3cfeature-card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) var(--transition-easing);
    border: 1px solid var(--border-color);
    height: 100%;
    background: var(--surface);
}

.z55c3cfeature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    background: rgba(99, 102, 241, 0.1);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    margin: 0 auto 1.25rem;
}

/* ========== 响应式 ========== */
@media (max-width: 1199px) {
    .z55c3cbento-item.span-4 { grid-column: span 6; }
    .z55c3cbento-item.span-8 { grid-column: span 12; }

    .z55c3csecurity-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

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

    .z55c3cabout-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .z55c3cbento-grid {
        grid-template-columns: 1fr;
    }

    .z55c3cbento-item.span-4,
    .z55c3cbento-item.span-6,
    .z55c3cbento-item.span-8,
    .z55c3cbento-item.span-12 {
        grid-column: span 1;
    }

    .z55c3csteps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .z55c3cstats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .z55c3ctrust-items {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .z55c3cdownload-grid {
        grid-template-columns: 1fr;
        max-width: 520px;
        margin-left: auto;
        margin-right: auto;
    }

    .z55c3ccert-grid {
        grid-template-columns: 1fr;
    }

    .z55c3chero-float-card {
        display: none;
    }

    .z55c3chero-image-container {
        min-height: auto;
        padding: 1.5rem 0 0;
    }

    .z55c3chero-visual {
        margin-top: 0.5rem;
    }

    .z55c3cdownload-note {
        flex-direction: column;
        text-align: center;
        gap: 1.25rem;
    }
}

@media (max-width: 767px) {
    :root {
        --section-padding-y: 44px;
        --grid-gap: 0.875rem;
        --card-padding: 1.15rem;
        --card-padding-sm: 1rem;
    }

    html {
        scroll-padding-top: 64px;
    }

    .z55c3ccontainer.container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .z55c3ccontainer.container .row {
        --bs-gutter-x: 0.75rem;
    }

    .z55c3cnavbar {
        padding: 0.5rem 0;
    }

    .z55c3cnavbar-brand img {
        height: 36px;
    }

    .z55c3cnavbar .navbar-collapse {
        max-height: 70vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .z55c3cnavbar .navbar-nav {
        gap: 0.15rem;
    }

    .z55c3cnavbar .navbar-nav .nav-link {
        padding: 0.7rem 0.5rem !important;
        font-size: 0.9rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Hero 移动端 */
    .z55c3chero-section {
        padding: 36px 0 44px;
        text-align: center;
    }

    .z55c3chero-badge {
        font-size: 0.76rem;
        padding: 0.4rem 0.85rem;
        max-width: 100%;
        justify-content: center;
    }

    .z55c3chero-title {
        font-size: 1.75rem;
        margin-bottom: 1rem;
    }

    .z55c3chero-subtitle {
        max-width: 100%;
        font-size: 0.92rem;
        line-height: 1.75;
        margin-bottom: 1.25rem;
        text-align: left;
    }

    .z55c3chero-highlights {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
    }

    .z55c3chero-highlight-item {
        font-size: 0.85rem;
        justify-content: flex-start;
        text-align: left;
    }

    .z55c3chero-buttons {
        flex-direction: column;
        gap: 0.65rem;
    }

    .z55c3chero-buttons .btn {
        width: 100%;
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    .z55c3chero-image-container {
        min-height: auto;
        padding: 1rem 0 0;
    }

    .z55c3chero-image {
        max-width: 240px;
    }

    /* 通用标题 */
    .z55c3csection-title {
        font-size: 1.45rem;
        margin-bottom: 0.75rem;
    }

    .z55c3csection-desc {
        font-size: 0.9rem;
        line-height: 1.65;
    }

    .z55c3csection-header {
        margin-bottom: 1.75rem;
        padding: 0;
    }

    .z55c3csection-tag {
        font-size: 0.76rem;
    }

    /* 信任条 */
    .z55c3ctrust-bar {
        padding: 1rem 0;
    }

    .z55c3ctrust-items {
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .z55c3ctrust-item {
        justify-content: flex-start;
        font-size: 0.82rem;
        padding: 0.35rem 0;
    }

    /* 平台介绍 */
    .z55c3cabout-content {
        text-align: left;
    }

    .z55c3cabout-content .z55c3csection-title {
        font-size: 1.45rem;
    }

    .z55c3cabout-content p {
        font-size: 0.9rem;
        line-height: 1.75;
        margin-bottom: 1rem;
    }

    .z55c3cabout-cards {
        grid-template-columns: 1fr;
    }

    .z55c3cabout-mini-card {
        min-height: auto;
    }

    /* Bento / 步骤 / 统计 */
    .z55c3cbento-item {
        padding: var(--card-padding-sm);
    }

    .z55c3cbento-item h3 {
        font-size: 1.05rem;
    }

    .z55c3cbento-item p {
        font-size: 0.88rem;
    }

    .z55c3csteps {
        grid-template-columns: 1fr;
    }

    .z55c3cstep-card {
        padding: var(--card-padding-sm);
    }

    .z55c3cguide-cta {
        margin-top: 1.75rem;
    }

    .z55c3cguide-cta .btn {
        width: 100%;
        padding: 0.85rem 1rem;
    }

    .z55c3cstats-section {
        padding: 36px 0;
    }

    .z55c3cstats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.65rem;
    }

    .z55c3cstat-item {
        padding: 0.85rem 0.4rem;
    }

    .z55c3cstat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        margin-bottom: 0.65rem;
    }

    .z55c3cstat-number {
        font-size: 1.5rem;
    }

    .z55c3cstat-label {
        font-size: 0.78rem;
        line-height: 1.35;
    }

    /* 下载区 */
    .z55c3cdownload-grid {
        max-width: 100%;
    }

    .z55c3cdownload-card .card-body {
        padding: var(--card-padding-sm);
    }

    .z55c3cdownload-card-header {
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 0.75rem;
    }

    .z55c3cdownload-card h3 {
        font-size: 1rem;
    }

    .z55c3cdownload-info {
        padding: 0.85rem;
    }

    .z55c3cinfo-item {
        font-size: 0.82rem;
        gap: 0.5rem;
    }

    .z55c3cdownload-action .btn {
        white-space: normal;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .z55c3cdownload-note {
        padding: var(--card-padding-sm);
        margin-top: 1.5rem;
    }

    .z55c3cdownload-note-content h4 {
        font-size: 0.95rem;
    }

    .z55c3cdownload-note-content p {
        font-size: 0.85rem;
        text-align: left;
    }

    .z55c3cqr-box img {
        width: 88px;
        height: 88px;
    }

    /* 安全 / FAQ */
    .z55c3csecurity-grid {
        grid-template-columns: 1fr;
    }

    .z55c3csecurity-card {
        padding: var(--card-padding-sm);
    }

    .z55c3ccert-grid {
        grid-template-columns: 1fr;
    }

    .z55c3cfaq-grid {
        grid-template-columns: 1fr;
    }

    .z55c3cfaq-question {
        font-size: 0.88rem;
        padding: 0.9rem 1rem;
        line-height: 1.45;
        word-break: break-word;
    }

    .z55c3cfaq-answer {
        font-size: 0.85rem;
        padding: 0 1rem 0.9rem;
    }

    /* 文章区 */
    .z55c3carticle-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        margin-bottom: 1.25rem;
    }

    .z55c3carticle-header h2 {
        font-size: 1.35rem;
        text-align: center;
    }

    .z55c3carticle-header .btn {
        width: 100%;
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }

    .z55c3carticle-grid .card-body {
        padding: 0.65rem;
    }

    .z55c3carticle-grid .card-body .small {
        font-size: 0.72rem !important;
        line-height: 1.35;
    }

    .z55c3cthumb-home,
    #article .z55c3cthumb-home {
        height: 100px !important;
    }

    #article h3.h5,
    .z55c3carticle-grid h3.h5 {
        font-size: 0.82rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 页脚 */
    .z55c3cfooter {
        padding: 36px 0 20px;
        text-align: center;
    }

    .z55c3cfooter-brand {
        display: inline-block;
    }

    .z55c3cfooter-brand img {
        height: 36px;
    }

    .z55c3cfooter p {
        font-size: 0.85rem;
    }

    .z55c3cfooter-title {
        font-size: 0.95rem;
        margin-bottom: 0.85rem;
        margin-top: 0.5rem;
    }

    .z55c3cfriend-links {
        justify-content: center;
        gap: 0.4rem 1rem;
    }

    .z55c3cfooter-bottom {
        font-size: 0.8rem;
        padding-top: 1.25rem;
        margin-top: 1.5rem;
    }

    .z55c3cfooter-bottom p {
        line-height: 1.7;
        word-break: break-word;
    }

    /* 移动端减少 hover 位移，避免点击后布局跳动 */
    .z55c3cbento-item:hover,
    .z55c3cstep-card:hover,
    .z55c3cdownload-card:hover,
    .z55c3csecurity-card:hover,
    .z55c3cabout-mini-card:hover,
    .z55c3ccertificate-card:hover,
    .z55c3carticle-grid .card:hover {
        transform: none;
    }
}

@media (max-width: 575px) {
    .z55c3chero-title {
        font-size: 1.55rem;
    }

    .z55c3chero-subtitle {
        font-size: 0.88rem;
    }

    .z55c3csection-title,
    .z55c3cabout-content .z55c3csection-title {
        font-size: 1.3rem;
    }

    .z55c3cstat-number {
        font-size: 1.35rem;
    }

    .z55c3cstat-label {
        font-size: 0.72rem;
    }

    .z55c3chero-image {
        max-width: 200px;
    }

    .z55c3cdownload-card-header {
        flex-direction: row;
        align-items: flex-start;
    }

    .z55c3cplatform-icon {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .z55c3cthumb-home,
    #article .z55c3cthumb-home {
        height: 92px !important;
    }

    .z55c3carticle-grid h3.h5 {
        font-size: 0.78rem;
    }
}

@media (max-width: 359px) {
    .z55c3ccontainer.container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .z55c3chero-title {
        font-size: 1.4rem;
    }

    .z55c3cstats-grid {
        gap: 0.5rem;
    }

    .z55c3cstat-item {
        padding: 0.75rem 0.25rem;
    }

    .z55c3carticle-grid {
        --bs-gutter-x: 0.5rem;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .z55c3cdownload-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .z55c3cdownload-card .card-body {
        padding: 1.25rem;
    }

    .z55c3cdownload-info {
        padding: 0.85rem;
    }

    .z55c3cinfo-item {
        font-size: 0.82rem;
    }
}

/* 列表页/内容页分页 */
.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;
}

@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;
    }

    .z55c3cthumb-list,
    .z55c3cthumb-related {
        height: 72px !important;
    }

    .z55c3cthumb-side {
        height: 50px !important;
    }

    .z55c3cthumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        margin: 0 auto;
    }
}

@media (max-width: 575px) {
    .z55c3cthumb-list,
    .z55c3cthumb-related {
        height: 64px !important;
    }

    .z55c3cthumb-side {
        height: 46px !important;
    }

    .z55c3cthumb-cover {
        height: 150px !important;
    }

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

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.2);
}