:root {
    --primary-color: #7C3AED;
    --primary-light: #A78BFA;
    --secondary-color: #5B21B6;
    --accent-color: #06B6D4;
    --accent-warm: #F59E0B;
    --text-color: #1E293B;
    --text-muted: #64748B;
    --light-bg: #F8FAFC;
    --surface: #FFFFFF;
    --dark-bg: #1E1B4B;
    --dark-surface: #312E81;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-600: #64748B;
    --gray-700: #475569;
    --gray-800: #334155;
    --gray-900: #0F172A;
    --gradient-main: linear-gradient(135deg, #1E1B4B 0%, #5B21B6 50%, #7C3AED 100%);
    --gradient-accent: linear-gradient(135deg, #06B6D4, #7C3AED);
    --shadow-sm: 0 1px 3px rgba(30, 27, 75, 0.08);
    --shadow-md: 0 4px 20px rgba(30, 27, 75, 0.1);
    --shadow-lg: 0 12px 40px rgba(30, 27, 75, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --section-padding-y: 4rem;
    --card-padding: 1.5rem;
    --card-border: 1px solid var(--gray-200);
    --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, sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background: var(--surface);
    overflow-x: hidden;
    max-width: 100vw;
}

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

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

/* ===== 通用区块标题 ===== */
.z50612section-header {
    max-width: 680px;
    margin: 0 auto 2.5rem;
    padding: 0 0.25rem;
}

.z50612section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-color);
    background: rgba(124, 58, 237, 0.08);
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    margin-bottom: 0.75rem;
}

.z50612section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.z50612section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 0;
    line-height: 1.75;
}

/* ===== 导航栏 ===== */
.z50612navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 0;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.z50612navbar-brand img {
    height: 42px;
}

.z50612nav-link {
    color: var(--gray-700) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed) var(--transition-easing);
}

.z50612nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(124, 58, 237, 0.06);
}

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

.navbar-collapse {
    background: white;
    padding: 0.75rem;
    border-radius: var(--radius-md);
}

@media (min-width: 992px) {
    .navbar-collapse {
        background: transparent;
        padding: 0;
    }
}

/* ===== 英雄区域 ===== */
.z50612hero-section {
    background: var(--gradient-main);
    color: white;
    padding: 4rem 0 4.5rem;
    position: relative;
    overflow: hidden;
}

.z50612hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(6, 182, 212, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(167, 139, 250, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.z50612hero-content {
    position: relative;
    z-index: 2;
}

.z50612hero-badge {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    max-width: 100%;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    line-height: 1.45;
}

.z50612hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.z50612hero-subtitle {
    font-size: 1.15rem;
    margin-bottom: 1rem;
    opacity: 0.92;
    line-height: 1.7;
}

.z50612hero-desc {
    font-size: 0.95rem;
    opacity: 0.85;
    margin-bottom: 1.5rem;
    line-height: 1.75;
}

.z50612hero-desc strong {
    color: var(--accent-color);
    font-weight: 600;
}

.z50612hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 2rem;
}

.z50612hero-tags span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.82rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.z50612hero-tags i {
    color: var(--accent-color);
}

.z50612hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}

.z50612hero-buttons .btn {
    padding: 0.8rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    transition: all var(--transition-speed) var(--transition-easing);
    display: inline-flex;
    align-items: center;
}

.z50612btn-register {
    background: white !important;
    color: var(--secondary-color) !important;
}

.z50612btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    background: white !important;
}

.z50612hero-buttons .btn-primary {
    background: var(--gradient-accent) !important;
    color: white !important;
}

.z50612hero-buttons .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.35);
}

/* 英雄图片区 */
.z50612hero-image-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 0.5rem;
    z-index: 2;
    max-width: 100%;
    min-height: 280px;
}

.z50612hero-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.z50612hero-image {
    width: 100%;
    max-width: 280px;
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

.z50612hero-image-shadow {
    display: none;
}

.z50612hero-float-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    box-shadow: var(--shadow-lg);
    z-index: 3;
    animation: float-card 5s ease-in-out infinite;
}

.z50612hero-float-card i {
    font-size: 1.4rem;
    color: var(--primary-color);
}

.z50612hero-float-card strong {
    display: block;
    font-size: 1rem;
    color: var(--gray-900);
    line-height: 1.2;
}

.z50612hero-float-card span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.z50612float-1 {
    top: 8%;
    left: 2%;
    animation-delay: 0s;
}

.z50612float-2 {
    bottom: 8%;
    right: 2%;
    animation-delay: 2s;
}

@media (min-width: 992px) and (max-width: 1199px) {
    .z50612hero-float-card {
        display: none;
    }
}

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

/* ===== 平台介绍 ===== */
.z50612about-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
    overflow-x: clip;
}

.z50612about-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    width: 100%;
}

.z50612panel-card {
    background: white;
    border: var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
    height: 100%;
    justify-content: center;
}

.z50612about-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    min-width: 0;
}

.z50612about-item > div:last-child {
    min-width: 0;
    flex: 1;
}

.z50612about-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.z50612about-item h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--gray-900);
}

.z50612about-item p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
}

.z50612about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 1fr;
    gap: 1rem;
    min-width: 0;
    height: 100%;
}

.z50612about-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
    border: var(--card-border);
    transition: all var(--transition-speed) var(--transition-easing);
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.z50612about-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.2);
}

.z50612about-card.z50612span-2 {
    grid-column: span 2;
}

.z50612about-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    display: block;
}

.z50612about-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--gray-900);
}

.z50612about-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

/* ===== Bento 核心优势 ===== */
.z50612features-section {
    padding: var(--section-padding-y) 0;
    background: white;
    overflow-x: clip;
}

.z50612bento-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 1fr;
    gap: 1rem;
    align-items: stretch;
}

.z50612bento-item {
    background: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    border: var(--card-border);
    transition: all var(--transition-speed) var(--transition-easing);
    min-width: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.z50612bento-item:hover {
    background: white;
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.15);
    transform: translateY(-2px);
}

.z50612bento-wide {
    grid-column: span 2;
}

.z50612bento-icon {
    width: 52px;
    height: 52px;
    background: rgba(124, 58, 237, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    color: var(--primary-color);
    margin-bottom: 1.25rem;
}

.z50612bento-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.65rem;
    color: var(--gray-900);
}

.z50612bento-item p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.7;
}

/* ===== 统计数据 ===== */
.z50612stats-section {
    background: var(--dark-bg);
    color: white;
    padding: 3.5rem 0;
    position: relative;
    overflow: hidden;
}

.z50612stats-row {
    align-items: stretch;
}

.z50612stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(124, 58, 237, 0.3) 0%, transparent 60%);
    pointer-events: none;
}

.z50612stats-intro {
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 1;
}

.z50612stats-intro h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.z50612stats-intro p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto;
}

.z50612stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1rem;
    transition: all var(--transition-speed) var(--transition-easing);
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 140px;
    height: 100%;
}

.z50612stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.z50612stat-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 0.75rem;
}

.z50612stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.15;
    word-break: keep-all;
}

.z50612stat-label {
    font-size: 0.92rem;
    opacity: 0.8;
}

/* ===== 下载区域 ===== */
.z50612download-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
    overflow-x: clip;
}

.z50612download-row {
    align-items: stretch;
}

.z50612download-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
    border: var(--card-border);
    transition: all var(--transition-speed) var(--transition-easing);
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
}

.z50612download-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.2);
}

.z50612download-card-head {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    min-width: 0;
}

.z50612download-card-head > div:last-child {
    min-width: 0;
    flex: 1;
}

.z50612download-card-head h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.15rem;
    color: var(--gray-900);
}

.z50612card-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.z50612platform-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.z50612ios-icon {
    background: linear-gradient(135deg, #1a1a2e, #4a4a6a);
    color: white;
}

.z50612android-icon {
    background: linear-gradient(135deg, #3DDC84, #2BB673);
    color: white;
}

.z50612pc-icon {
    background: linear-gradient(135deg, #0078D4, #005A9E);
    color: white;
}

.z50612download-info {
    background: var(--gray-100);
    padding: 1rem 1.15rem;
    border-radius: var(--radius-md);
    flex: 1 1 auto;
    margin-bottom: 1.25rem;
}

.z50612info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.65rem;
    font-size: 0.9rem;
}

.z50612info-item:last-child {
    margin-bottom: 0;
}

.z50612info-item i {
    color: var(--primary-color);
    margin-right: 0.65rem;
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z50612info-item span {
    color: var(--gray-700);
    line-height: 1.5;
}

.z50612download-action {
    margin-top: auto;
    flex-shrink: 0;
}

.z50612download-action .btn {
    width: 100%;
    padding: 0.7rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    transition: all var(--transition-speed) var(--transition-easing);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
    line-height: 1.35;
}

.z50612btn-ios {
    background: linear-gradient(135deg, #1a1a2e, #4a4a6a) !important;
    color: white !important;
}

.z50612btn-android {
    background: linear-gradient(135deg, #3DDC84, #2BB673) !important;
    color: white !important;
}

.z50612btn-pc {
    background: linear-gradient(135deg, #0078D4, #005A9E) !important;
    color: white !important;
}

.z50612download-action .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.z50612download-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background: rgba(124, 58, 237, 0.06);
    border: 1px solid rgba(124, 58, 237, 0.15);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-top: 2.5rem;
}

.z50612download-tip i {
    color: var(--primary-color);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.z50612download-tip p {
    margin: 0;
    font-size: 0.92rem;
    color: var(--gray-700);
    line-height: 1.65;
}

/* ===== 注册指南 ===== */
.z50612register-section {
    padding: var(--section-padding-y) 0;
    background: white;
    overflow-x: clip;
}

.z50612register-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.z50612register-desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.75;
    margin-bottom: 1.75rem;
}

.z50612btn-register-main {
    background: var(--gradient-main) !important;
    color: white !important;
    padding: 0.85rem 2rem !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600;
    border: none !important;
    transition: all var(--transition-speed) var(--transition-easing);
}

.z50612btn-register-main:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white !important;
}

.z50612steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 1fr;
    gap: 1rem;
    align-items: stretch;
    min-width: 0;
}

.z50612step-card {
    background: var(--light-bg);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    border: var(--card-border);
    position: relative;
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.z50612step-card:hover {
    background: white;
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.2);
    transform: translateY(-2px);
}

.z50612step-num {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.z50612step-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.z50612step-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
}

/* ===== 安全保障 ===== */
.z50612security-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
    overflow-x: clip;
}

.z50612security-section > .z50612container > .z50612row {
    align-items: stretch;
}

.z50612security-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    height: 100%;
    box-shadow: var(--shadow-sm);
    border: var(--card-border);
    transition: all var(--transition-speed) var(--transition-easing);
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.z50612security-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.15);
}

.z50612security-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin: 0 auto 1.25rem;
    background: var(--gradient-accent);
    color: white;
}

.z50612security-card h3 {
    color: var(--gray-900);
    font-weight: 600;
    text-align: center;
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

.z50612security-features {
    background: var(--gray-100);
    padding: 1rem 1.15rem;
    border-radius: var(--radius-md);
    flex: 1 1 auto;
}

.z50612feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.6rem;
    font-size: 0.88rem;
}

.z50612feature-item:last-child {
    margin-bottom: 0;
}

.z50612feature-item i {
    color: var(--primary-color);
    margin-right: 0.6rem;
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z50612feature-item span {
    color: var(--gray-700);
    line-height: 1.5;
}

.z50612security-certificates {
    margin-top: 2.5rem;
}

.z50612security-certificates .row {
    align-items: stretch;
}

.z50612certificate-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: var(--card-border);
    transition: all var(--transition-speed) var(--transition-easing);
    height: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.z50612certificate-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.z50612certificate-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.25rem;
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
}

.z50612certificate-card h4 {
    color: var(--gray-900);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.z50612certificate-card p {
    color: var(--text-muted);
    margin-bottom: 0;
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ===== FAQ ===== */
.z50612faq-section {
    padding: var(--section-padding-y) 0;
    background: white;
    overflow-x: clip;
}

.z50612faq-accordion {
    --bs-accordion-border-width: 0;
}

.z50612faq-accordion .accordion-item {
    border: var(--card-border);
    border-radius: var(--radius-md) !important;
    margin-bottom: 0.65rem;
    overflow: hidden;
    background: var(--light-bg);
}

.z50612faq-accordion .accordion-button {
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--gray-900);
    background: var(--light-bg);
    padding: 1.15rem 1.5rem;
    box-shadow: none !important;
}

.z50612faq-accordion .accordion-button:not(.collapsed) {
    background: white;
    color: var(--primary-color);
}

.z50612faq-accordion .accordion-button::after {
    background-size: 1rem;
}

.z50612faq-accordion .accordion-body {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.75;
    background: white;
}

/* ===== 文章板块 ===== */
.z50612article-section {
    padding: var(--section-padding-y) 0;
    background: var(--light-bg);
    overflow-x: clip;
}

.z50612article-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.z50612article-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
}

.z50612btn-outline {
    background: transparent !important;
    color: var(--primary-color) !important;
    border: 2px solid var(--primary-color) !important;
    padding: 0.5rem 1.25rem !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-speed) var(--transition-easing);
}

.z50612btn-outline:hover {
    background: var(--primary-color) !important;
    color: white !important;
}

.z50612article-card {
    border: var(--card-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: white;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) var(--transition-easing);
    min-width: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.z50612article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.15);
}

.z50612article-thumb-wrap {
    overflow: hidden;
}

.z50612thumb-home {
    height: 130px;
    object-fit: cover;
    width: 100%;
    transition: transform var(--transition-speed) var(--transition-easing);
}

.z50612article-card:hover .z50612thumb-home {
    transform: scale(1.03);
}

.z50612article-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.z50612article-title {
    font-size: 0.95rem;
    line-height: 1.45;
    margin-bottom: 0;
}

.z50612article-title a {
    color: var(--gray-900);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.z50612article-title a:hover {
    color: var(--primary-color);
}

.z50612article-card .card-body {
    padding: 0.85rem 1rem;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
}

#article .col {
    display: flex;
    min-width: 0;
}

/* ===== 页脚 ===== */
.z50612footer {
    background: var(--gray-900);
    padding: 4rem 0 2rem;
    color: rgba(255, 255, 255, 0.7);
}

.z50612footer-brand img {
    max-width: 100%;
    height: auto;
    filter: brightness(1.1);
}

.z50612footer-title {
    color: white;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.z50612footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z50612footer-links li {
    margin-bottom: 0.6rem;
}

.z50612footer-link {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed);
}

.z50612footer-link:hover {
    color: var(--accent-color);
}

.z50612friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z50612friend-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-speed);
}

.z50612friend-links a:hover {
    color: var(--accent-color);
}

.z50612footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.88rem;
}

.z50612footer-bottom-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem 0.85rem;
    margin-bottom: 0.75rem;
}

.z50612footer-bottom-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-speed);
    white-space: nowrap;
    font-size: 0.88rem;
}

.z50612footer-bottom-links a:hover {
    color: var(--accent-color);
}

.z50612footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.z50612footer-bottom a:hover {
    color: var(--accent-color);
}

/* ===== 通用按钮 ===== */
.btn {
    position: relative;
    overflow: hidden;
}

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

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(124, 58, 237, 0.2);
}

/* ===== 兼容旧类名 ===== */
.z50612feature-card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    height: 100%;
    background: white;
}

.z50612feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    background: rgba(124, 58, 237, 0.1);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    margin: 0 auto 1.25rem;
}

/* ===== 列表页/内容页兼容 ===== */
.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;
}

.z50612thumb-list,
.z50612thumb-related {
    height: 72px;
    object-fit: cover;
}

.z50612thumb-side {
    height: 50px;
    object-fit: cover;
}

.z50612thumb-cover {
    max-width: 100%;
    width: 100%;
    height: 170px;
    object-fit: cover;
    margin: 0 auto;
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
    .z50612hero-title {
        font-size: 2.5rem;
    }

    .z50612section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 991px) {
    .z50612hero-section {
        padding: 3rem 0 3.5rem;
    }

    .z50612hero-title {
        font-size: 2.1rem;
    }

    .z50612about-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z50612about-card.z50612span-2 {
        grid-column: span 2;
    }

    .z50612panel-card {
        height: auto;
    }

    .z50612bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z50612bento-wide {
        grid-column: span 2;
    }

    .z50612hero-float-card {
        display: none;
    }

    .z50612hero-image-container {
        margin-top: 1.5rem;
        min-height: auto;
    }

    .z50612register-title {
        font-size: 1.75rem;
    }

    .z50612register-intro {
        margin-bottom: 1rem;
    }

    .z50612footer {
        text-align: center;
    }

    .z50612footer-links {
        text-align: center;
    }

    .z50612friend-links {
        justify-content: center;
    }
}

@media (max-width: 767px) {
    :root {
        --section-padding-y: 2.75rem;
        --card-padding: 1.15rem;
    }

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

    .container,
    .z50612container.container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* 导航 */
    .z50612navbar {
        padding: 0.5rem 0;
    }

    .z50612navbar-brand img,
    .navbar-brand img {
        height: 36px;
        width: auto;
    }

    .z50612navbar .navbar-collapse {
        margin-top: 0.65rem;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        padding: 0.25rem 0 0.5rem;
        border-top: 1px solid var(--gray-200);
        border-radius: 0;
        box-shadow: none;
    }

    .z50612navbar .navbar-nav {
        width: 100%;
    }

    .z50612navbar .navbar-nav .nav-link {
        padding: 0.65rem 0.25rem !important;
        font-size: 0.95rem;
        border-bottom: 1px solid var(--gray-100);
        border-radius: 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .z50612navbar .navbar-toggler {
        min-width: 44px;
        min-height: 44px;
    }

    .z50612navbar .navbar-nav .nav-item:last-child .nav-link {
        border-bottom: none;
    }

    /* Hero */
    .z50612hero-section {
        padding: 2.25rem 0 2.75rem;
    }

    .z50612hero-badge {
        font-size: 0.78rem;
        padding: 0.35rem 0.75rem;
        line-height: 1.45;
        max-width: 100%;
    }

    .z50612hero-title {
        font-size: 1.75rem;
        margin-bottom: 0.75rem;
    }

    .z50612hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
        line-height: 1.6;
    }

    .z50612hero-desc {
        font-size: 0.88rem;
        margin-bottom: 1rem;
        line-height: 1.65;
        word-break: break-word;
    }

    .z50612hero-desc strong {
        font-weight: 600;
    }

    .z50612hero-tags {
        gap: 0.4rem;
        margin-bottom: 1.25rem;
    }

    .z50612hero-tags span {
        font-size: 0.72rem;
        padding: 0.28rem 0.6rem;
    }

    .z50612hero-buttons {
        flex-direction: column;
        gap: 0.65rem;
    }

    .z50612hero-buttons .btn,
    .z50612hero-buttons .btn-lg {
        width: 100%;
        justify-content: center;
        padding: 0.7rem 1.15rem;
        font-size: 0.92rem;
    }

    .z50612hero-image-container {
        min-height: auto;
        padding: 0.5rem 0 0;
        margin-top: 0;
    }

    .z50612hero-image {
        max-width: 240px;
    }

    /* 通用区块标题 */
    .z50612section-header {
        margin-bottom: 1.75rem;
    }

    .z50612section-header h2 {
        font-size: 1.55rem;
        line-height: 1.35;
    }

    .z50612section-desc {
        font-size: 0.9rem;
        line-height: 1.65;
    }

    .z50612about-section,
    .z50612features-section,
    .z50612download-section,
    .z50612register-section,
    .z50612security-section,
    .z50612faq-section,
    .z50612article-section {
        padding: var(--section-padding-y) 0;
    }

    .z50612about-grid {
        grid-template-columns: 1fr;
    }

    .z50612about-card.z50612span-2 {
        grid-column: span 1;
    }

    .z50612panel-card {
        padding: var(--card-padding);
    }

    .z50612about-item {
        gap: 0.75rem;
    }

    .z50612about-icon {
        width: 40px;
        height: 40px;
        font-size: 1.05rem;
    }

    .z50612about-item h3 {
        font-size: 0.98rem;
    }

    .z50612about-item p {
        font-size: 0.86rem;
    }

    .z50612bento-grid {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .z50612bento-wide {
        grid-column: span 1;
    }

    .z50612bento-item {
        padding: var(--card-padding);
    }

    .z50612bento-icon {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
        margin-bottom: 0.85rem;
    }

    .z50612bento-item h3 {
        font-size: 1rem;
    }

    .z50612bento-item p {
        font-size: 0.86rem;
    }

    /* 统计数据 */
    .z50612stats-section {
        padding: 2.75rem 0;
    }

    .z50612stats-intro {
        margin-bottom: 1.75rem;
    }

    .z50612stats-intro h2 {
        font-size: 1.45rem;
        line-height: 1.35;
    }

    .z50612stats-intro p {
        font-size: 0.88rem;
        padding: 0 0.25rem;
    }

    .z50612stat-number {
        font-size: 1.75rem;
    }

    .z50612stat-item {
        padding: 1.1rem 0.5rem;
        min-height: 108px;
    }

    .z50612stat-icon {
        font-size: 1.25rem;
        margin-bottom: 0.4rem;
    }

    .z50612stat-label {
        font-size: 0.78rem;
        line-height: 1.35;
    }

    /* 下载区 */
    .z50612download-card {
        padding: var(--card-padding);
    }

    .z50612download-card-head {
        flex-direction: row;
        align-items: center;
        gap: 0.85rem;
        margin-bottom: 1.15rem;
    }

    .z50612download-card-head h3 {
        font-size: 1.02rem;
    }

    .z50612card-meta {
        font-size: 0.8rem;
    }

    .z50612platform-icon {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
    }

    .z50612download-info {
        padding: 0.85rem 1rem;
        margin-bottom: 1rem;
    }

    .z50612info-item {
        font-size: 0.84rem;
    }

    .z50612download-tip {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
        padding: 1rem;
        margin-top: 1.75rem;
    }

    .z50612download-tip p {
        font-size: 0.86rem;
        word-break: break-word;
    }

    .z50612download-row {
        --bs-gutter-y: 0.85rem;
    }

    .z50612security-section .row.g-4 {
        --bs-gutter-y: 0.85rem;
    }

    /* 注册指南 */
    .z50612register-intro {
        margin-bottom: 1.25rem;
    }

    .z50612register-title {
        font-size: 1.45rem;
    }

    .z50612register-desc {
        font-size: 0.9rem;
        margin-bottom: 1.15rem;
    }

    .z50612btn-register-main {
        width: 100%;
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
        padding: 0.75rem 1.15rem !important;
        font-size: 0.92rem;
    }

    .z50612steps-grid {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .z50612step-card {
        padding: var(--card-padding);
    }

    .z50612step-num {
        font-size: 1.6rem;
    }

    .z50612step-card h4 {
        font-size: 0.98rem;
    }

    .z50612step-card p {
        font-size: 0.84rem;
    }

    /* 安全区 */
    .z50612security-card,
    .z50612certificate-card {
        padding: var(--card-padding);
    }

    .z50612security-icon {
        width: 52px;
        height: 52px;
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }

    .z50612security-card h3 {
        font-size: 1rem;
        margin-bottom: 1rem;
    }

    .z50612security-features {
        padding: 0.85rem 1rem;
    }

    .z50612certificate-icon {
        width: 56px;
        height: 56px;
        font-size: 1.3rem;
    }

    .z50612security-certificates {
        margin-top: 2rem;
    }

    /* FAQ */
    .z50612faq-accordion .accordion-button {
        padding: 0.95rem 2.75rem 0.95rem 1rem;
        font-size: 0.88rem;
        line-height: 1.45;
        word-break: break-word;
    }

    .z50612faq-accordion .accordion-body {
        padding: 0 1rem 0.95rem;
        font-size: 0.86rem;
        line-height: 1.65;
    }

    /* 文章区 */
    .z50612article-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.85rem;
        margin-bottom: 1.5rem;
    }

    .z50612article-header h2 {
        font-size: 1.45rem;
    }

    .z50612btn-outline {
        width: 100%;
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
    }

    #article .z50612thumb-home {
        height: 140px !important;
    }

    #article .z50612article-title {
        font-size: 0.9rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    #article .z50612article-meta {
        font-size: 0.72rem;
    }

    /* 页脚 */
    .z50612footer {
        padding: 2.5rem 0 1.5rem;
    }

    .z50612footer > .container > .row:first-child > .col-12:first-child {
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .z50612footer > .container > .row:first-child > .col-12:first-child p {
        text-align: center;
    }

    .z50612footer > .container > .row:first-child > .col-6,
    .z50612footer > .container > .row:first-child > .col-sm-6 {
        text-align: left;
    }

    .z50612footer > .container > .row:first-child .z50612footer-links {
        text-align: left;
    }

    .z50612footer-logo {
        height: 36px;
        width: auto;
    }

    .z50612footer-brand {
        display: inline-block;
    }

    .z50612footer > .container > .row > .col-6 {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .z50612footer-title {
        font-size: 0.92rem;
        margin-bottom: 0.75rem;
    }

    .z50612footer-links li {
        margin-bottom: 0.45rem;
    }

    .z50612footer-link {
        font-size: 0.84rem;
    }

    .z50612footer > .container > .row > .col-12 p {
        font-size: 0.86rem;
        line-height: 1.65;
    }

    .z50612friend-links {
        gap: 0.4rem 1rem;
    }

    .z50612footer-bottom {
        text-align: center;
        padding-top: 1.25rem;
    }

    .z50612footer-bottom p {
        font-size: 0.8rem;
        line-height: 1.65;
    }

    .z50612footer-bottom-links {
        gap: 0.45rem 0.65rem;
    }

    .z50612footer-bottom-links a {
        font-size: 0.8rem;
    }

    .z50612thumb-list,
    .z50612thumb-related {
        height: 72px !important;
    }

    .z50612thumb-side {
        height: 50px !important;
    }

    .z50612thumb-cover {
        height: 170px !important;
    }

    .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;
    }
}

@media (max-width: 575px) {
    :root {
        --section-padding-y: 2.25rem;
        --card-padding: 1rem;
    }

    .z50612hero-section {
        padding: 1.85rem 0 2.25rem;
    }

    .z50612hero-title {
        font-size: 1.5rem;
    }

    .z50612hero-subtitle {
        font-size: 0.9rem;
    }

    .z50612hero-desc {
        font-size: 0.84rem;
    }

    .z50612hero-tags span {
        font-size: 0.68rem;
    }

    .z50612hero-image {
        max-width: 200px;
    }

    .z50612section-header h2 {
        font-size: 1.4rem;
    }

    .z50612stats-row {
        --bs-gutter-x: 0.45rem;
        --bs-gutter-y: 0.45rem;
    }

    .z50612download-row {
        --bs-gutter-y: 0.75rem;
    }

    .z50612stat-number {
        font-size: 1.35rem;
    }

    .z50612stat-item {
        min-height: 96px;
        padding: 0.85rem 0.35rem;
    }

    .z50612stat-label {
        font-size: 0.72rem;
    }

    .z50612register-title {
        font-size: 1.3rem;
    }

    #article .z50612thumb-home {
        height: 120px !important;
    }

    .z50612thumb-list,
    .z50612thumb-related {
        height: 64px !important;
    }

    .z50612thumb-side {
        height: 46px !important;
    }

    .z50612thumb-cover {
        height: 150px !important;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }

    .z50612footer {
        padding: 2rem 0 1.25rem;
    }

    .z50612footer-bottom p {
        font-size: 0.75rem;
    }

    .z50612footer-bottom-links a {
        font-size: 0.75rem;
    }

    .z50612faq-accordion .accordion-button {
        padding-right: 2.5rem;
        font-size: 0.84rem;
    }
}

@media (max-width: 359px) {
    .z50612hero-title {
        font-size: 1.35rem;
    }

    .z50612stat-number {
        font-size: 1.2rem;
    }

    .z50612stat-label {
        font-size: 0.68rem;
    }

    .z50612hero-buttons .btn {
        font-size: 0.88rem;
    }
}