:root {
    --primary-color: #7c3aed;
    --secondary-color: #4c1d95;
    --accent-color: #f43f5e;
    --accent-hover: #e11d48;
    --text-color: #1e1b4b;
    --text-muted: #64748b;
    --light-bg: #f5f3ff;
    --dark-bg: #0f0a1e;
    --surface: #ffffff;
    --border-color: #e9e4f5;
    --gray-100: #f8fafc;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --transition-speed: 0.3s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 14px;
    --radius-xl: 14px;
    --section-padding: 72px;
    --card-padding: 1.5rem;
    --card-border: 1px solid var(--border-color);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
}

*,
*::before,
*::after {
    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;
}

/* 栅格列内 flex/grid 子项防止撑破版面 */
.z2f920hero-section .row > [class*="col"],
.z2f920about-section .row > [class*="col"],
.z2f920features-section .row > [class*="col"],
.z2f920stats-section .row > [class*="col"],
.z2f920download-section .row > [class*="col"],
.z2f920register-section .row > [class*="col"],
.z2f920security-section .row > [class*="col"],
.z2f920faq-section .row > [class*="col"],
.z2f920article-section .row > [class*="col"] {
    min-width: 0;
}

/* ===== 通用组件 ===== */
.z2f920section-header {
    max-width: 680px;
    margin: 0 auto 2.5rem;
}

.z2f920section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.3;
    overflow-wrap: anywhere;
}

.z2f920section-tag {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.z2f920section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 0;
    line-height: 1.8;
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: #fff;
    border: none;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed) var(--transition-easing);
}

.btn-accent:hover {
    background: linear-gradient(135deg, var(--accent-hover), #be123c);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(244, 63, 94, 0.35);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

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

/* ===== 导航栏 ===== */
.z2f920navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    padding: 0.85rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.z2f920navbar-brand img {
    height: 45px;
}

.z2f920nav-link {
    color: var(--gray-700) !important;
    font-weight: 500;
    padding: 0.5rem 0.85rem !important;
    transition: color var(--transition-speed) ease;
    font-size: 0.95rem;
}

.z2f920nav-link:hover {
    color: var(--primary-color) !important;
}

/* ===== 统一卡片基础（浅色背景区块；注册步骤区单独见下） ===== */
.z2f920about-card,
.z2f920bento-item,
.z2f920download-card,
.z2f920security-card,
.z2f920certificate-card,
.z2f920article-card,
.z2f920svc-card {
    border: var(--card-border);
    border-radius: var(--radius-lg);
}

/* ===== 英雄区域 ===== */
.z2f920hero-section {
    background: linear-gradient(145deg, #0f0a1e 0%, #312e81 42%, #5b21b6 78%, #7c3aed 100%);
    color: white;
    padding: var(--section-padding) 0 calc(var(--section-padding) + 8px);
    position: relative;
    overflow: hidden;
}

.z2f920hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 85%, rgba(244, 63, 94, 0.18) 0%, transparent 45%),
        radial-gradient(circle at 88% 12%, rgba(124, 58, 237, 0.35) 0%, transparent 48%);
    pointer-events: none;
}

.z2f920hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    max-width: 100%;
}

.z2f920hero-kicker > span:last-of-type {
    line-height: 1.45;
    min-width: 0;
}

.z2f920hero-kicker-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), #fb7185);
    box-shadow: 0 0 12px rgba(244, 63, 94, 0.7);
}

.z2f920hero-points {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
}

.z2f920hero-points li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 0.45rem;
}

.z2f920hero-points li i {
    color: #fda4af;
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.z2f920quick-strip {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 0;
    position: relative;
    z-index: 5;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
}

.z2f920quick-strip-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.35rem 0.5rem;
    max-width: 100%;
}

.z2f920quick-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    min-height: 44px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gray-700);
    text-decoration: none;
    border: 1px solid transparent;
    transition: background var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
    touch-action: manipulation;
}

.z2f920quick-item i {
    font-size: 1rem;
    color: var(--primary-color);
}

.z2f920quick-item:hover {
    background: var(--light-bg);
    color: var(--secondary-color);
    border-color: rgba(124, 58, 237, 0.2);
}

.z2f920about-band {
    padding-top: 0.5rem;
}

.z2f920about-band .row > [class*="col"] {
    min-width: 0;
}

.z2f920about-pill {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.1rem;
    background: var(--surface);
    border: var(--card-border);
    border-radius: var(--radius-lg);
    height: 100%;
    min-width: 0;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.z2f920about-pill > div {
    min-width: 0;
}

.z2f920about-pill strong,
.z2f920about-pill span {
    overflow-wrap: anywhere;
}

.z2f920about-pill i {
    font-size: 1.35rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.z2f920about-pill strong {
    display: block;
    font-size: 0.95rem;
    color: var(--gray-900);
}

.z2f920about-pill span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
    line-height: 1.4;
}

.z2f920about-pill:hover {
    border-color: rgba(124, 58, 237, 0.25);
    box-shadow: var(--shadow-sm);
}

.z2f920svc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.z2f920svc-card {
    background: var(--surface);
    padding: var(--card-padding);
    min-width: 0;
    transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.z2f920svc-card:hover {
    border-color: rgba(124, 58, 237, 0.28);
    box-shadow: var(--shadow-md);
}

.z2f920svc-card-wide {
    grid-column: 1 / -1;
}

.z2f920svc-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.z2f920svc-num {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--primary-color);
    background: rgba(124, 58, 237, 0.1);
    padding: 0.25rem 0.55rem;
    border-radius: 6px;
}

.z2f920svc-head i {
    font-size: 1.35rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

.z2f920svc-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
    overflow-wrap: anywhere;
}

.z2f920svc-card p {
    color: var(--text-muted);
    font-size: 0.925rem;
    margin: 0;
    line-height: 1.75;
    overflow-wrap: anywhere;
}

.z2f920stats-intro {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, 0.88);
}

.z2f920stats-heading {
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
}

.z2f920stats-intro p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.9;
}

.z2f920hero-content {
    position: relative;
    z-index: 2;
}

.z2f920hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(8px);
    flex-wrap: wrap;
    max-width: 100%;
}

.z2f920hero-badge i {
    color: var(--accent-color);
}

.z2f920hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.z2f920hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    opacity: 0.92;
    line-height: 1.8;
}

.z2f920hero-subtitle strong {
    color: var(--accent-color);
    font-weight: 600;
}

.z2f920hero-desc {
    font-size: 0.95rem;
    opacity: 0.75;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.z2f920hero-trust {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.25rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.z2f920trust-item {
    display: flex;
    flex-direction: column;
}

.z2f920trust-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.z2f920trust-label {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 0.15rem;
}

.z2f920hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.z2f920hero-buttons .btn {
    padding: 0.85rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
}

.z2f920hero-buttons .btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.4);
    color: white;
    background: transparent;
}

.z2f920hero-buttons .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
}

/* 英雄视觉区 */
.z2f920hero-visual {
    position: relative;
    z-index: 2;
    overflow: hidden;
    max-width: 100%;
    padding: 0.5rem 0;
}

.z2f920hero-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1rem;
}

.z2f920hero-image {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
    object-fit: contain;
}

.z2f920hero-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1.15rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--gray-800);
    font-size: 0.85rem;
    animation: floatCard 4s ease-in-out infinite;
    max-width: min(260px, calc(100% - 1rem));
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.z2f920hero-float-card i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.z2f920hero-float-card strong {
    display: block;
    font-size: 0.9rem;
}

.z2f920hero-float-card small {
    color: var(--text-muted);
}

.z2f920float-1 {
    top: 8%;
    left: 2%;
    animation-delay: 0s;
}

.z2f920float-2 {
    bottom: 12%;
    right: 2%;
    animation-delay: 2s;
}

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

/* ===== 品牌介绍 ===== */
.z2f920about-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z2f920about-section .row > [class*="col"] {
    display: flex;
}

.z2f920about-card {
    background: var(--gray-100);
    padding: var(--card-padding);
    height: 100%;
    width: 100%;
    transition: all var(--transition-speed) var(--transition-easing);
}

.z2f920about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.2);
}

.z2f920about-card-featured {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(76, 29, 149, 0.06));
}

.z2f920about-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.z2f920about-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
    overflow-wrap: anywhere;
}

.z2f920about-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
    line-height: 1.75;
    overflow-wrap: anywhere;
}

/* ===== 核心优势 Bento Grid ===== */
.z2f920features-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z2f920bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.z2f920bento-item {
    background: var(--surface);
    padding: var(--card-padding);
    transition: all var(--transition-speed) var(--transition-easing);
    min-width: 0;
}

.z2f920bento-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(124, 58, 237, 0.2);
}

.z2f920bento-large {
    grid-column: span 2;
}

.z2f920bento-wide {
    grid-column: span 3;
}

.z2f920bento-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.z2f920bento-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
}

.z2f920bento-item p {
    color: var(--text-muted);
    font-size: 0.925rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== 平台数据 ===== */
.z2f920stats-section {
    padding: clamp(2.5rem, 5vw, 3.5rem) 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

.z2f920stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.z2f920stat-item {
    text-align: center;
    padding: 1.25rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-lg);
    min-width: 0;
}

.z2f920stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
}

.z2f920stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

.z2f920stat-label {
    font-size: 0.95rem;
    opacity: 0.85;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

/* ===== 下载区域 ===== */
.z2f920download-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z2f920download-section .row > [class*="col"] {
    display: flex;
}

.z2f920download-card {
    background: var(--gray-100);
    padding: var(--card-padding);
    transition: all var(--transition-speed) var(--transition-easing);
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    min-width: 0;
}

.z2f920download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.z2f920download-card-featured {
    background: linear-gradient(160deg, rgba(124, 58, 237, 0.06), rgba(244, 63, 94, 0.05));
    padding-top: 2.25rem;
}

.z2f920download-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    background: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50px;
}

.z2f920download-card-top {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
    padding-right: 2.5rem;
    min-width: 0;
}

.z2f920download-card-top > div:last-child {
    min-width: 0;
    flex: 1;
}

.z2f920platform-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;
}

.z2f920ios-icon {
    background: linear-gradient(135deg, #1c1c1e, #3a3a3c);
    color: white;
}

.z2f920android-icon {
    background: linear-gradient(135deg, #3ddc84, #2bb673);
    color: white;
}

.z2f920windows-icon {
    background: linear-gradient(135deg, #0078d4, #005a9e);
    color: white;
}

.z2f920download-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
    overflow-wrap: anywhere;
    line-height: 1.35;
}

.z2f920platform-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.z2f920download-features {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
    flex-grow: 1;
}

.z2f920download-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.5rem 0;
    color: var(--gray-700);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.z2f920download-features li:last-child {
    border-bottom: none;
}

.z2f920download-features li i {
    color: var(--primary-color);
    margin-top: 0.2rem;
    font-size: 0.8rem;
}

.z2f920download-action {
    margin-top: auto;
}

.z2f920download-action .btn {
    padding: 0.75rem 1.5rem;
}

/* 安装步骤（外容器仅作分区，线框落在每步卡片上） */
.z2f920install-guide {
    background: var(--light-bg);
    padding: var(--card-padding);
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.08);
}

.z2f920install-guide .row > [class*="col"] {
    display: flex;
}

.z2f920install-guide h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.z2f920guide-step {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--surface);
    border: var(--card-border);
    border-radius: var(--radius-lg);
    width: 100%;
    height: 100%;
    min-width: 0;
}

.z2f920step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.z2f920guide-step h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.z2f920guide-step p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== 注册指南 ===== */
.z2f920register-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(160deg, var(--dark-bg) 0%, #312e81 45%, #4c1d95 100%);
    color: white;
}

.z2f920register-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.75rem 0 1rem;
    line-height: 1.3;
    overflow-wrap: anywhere;
}

.z2f920register-desc {
    color: rgba(255, 255, 255, 0.75);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    overflow-wrap: anywhere;
}

.z2f920register-section .z2f920section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
}

.z2f920register-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.04);
    padding: 0.5rem var(--card-padding);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.z2f920reg-step {
    display: flex;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    align-items: flex-start;
}

.z2f920reg-step-content {
    min-width: 0;
    flex: 1;
}

.z2f920reg-step:last-child {
    border-bottom: none;
}

.z2f920reg-step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-color);
    color: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    flex-shrink: 0;
}

.z2f920reg-step-content h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.z2f920reg-step-content p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.925rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== 安全保障 ===== */
.z2f920security-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z2f920security-section .row > [class*="col"] {
    display: flex;
}

.z2f920security-card {
    background: var(--surface);
    padding: var(--card-padding);
    height: 100%;
    width: 100%;
    transition: all var(--transition-speed) var(--transition-easing);
    text-align: center;
    display: flex;
    flex-direction: column;
}

.z2f920security-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.z2f920security-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    flex-shrink: 0;
}

.z2f920security-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.z2f920security-list {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
    flex: 1;
}

.z2f920security-list li {
    padding: 0.45rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: 1.25rem;
    overflow-wrap: anywhere;
}

.z2f920security-list li:last-child {
    border-bottom: none;
}

.z2f920security-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
}

.z2f920certificate-card {
    background: var(--surface);
    padding: var(--card-padding);
    text-align: center;
    height: 100%;
    width: 100%;
    transition: all var(--transition-speed) var(--transition-easing);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.z2f920certificate-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.z2f920certificate-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    flex-shrink: 0;
}

.z2f920certificate-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
}

.z2f920certificate-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.65;
    flex: 1;
}

/* ===== FAQ ===== */
.z2f920faq-section {
    padding: var(--section-padding) 0;
    background: var(--surface);
}

.z2f920faq-accordion {
    --bs-accordion-border-width: 0;
    --bs-accordion-border-radius: var(--radius-lg);
    --bs-accordion-inner-border-radius: var(--radius-lg);
    --bs-accordion-btn-focus-box-shadow: none;
    --bs-accordion-active-bg: rgba(124, 58, 237, 0.08);
    --bs-accordion-active-color: var(--primary-color);
}

.z2f920faq-accordion .accordion-item {
    border: var(--card-border) !important;
    border-radius: var(--radius-lg) !important;
    margin-bottom: 0.5rem;
    overflow: hidden;
    background: var(--gray-100);
}

.z2f920faq-accordion .accordion-item:last-child {
    margin-bottom: 0;
}

.z2f920faq-accordion .accordion-button {
    font-weight: 600;
    font-size: 1rem;
    color: var(--gray-900);
    background: var(--gray-100);
    padding: 1rem 1.25rem;
    box-shadow: none;
    border-radius: var(--radius-lg);
    white-space: normal;
    text-align: left;
    line-height: 1.55;
}

.z2f920faq-accordion .accordion-button.collapsed {
    border-radius: var(--radius-lg);
}

.z2f920faq-accordion .accordion-button:not(.collapsed) {
    background: rgba(124, 58, 237, 0.08);
    color: var(--primary-color);
}

.z2f920faq-accordion .accordion-button:focus {
    box-shadow: none;
    border-color: transparent;
}

.z2f920faq-accordion .accordion-body {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* ===== 文章板块 ===== */
.z2f920article-section {
    padding: var(--section-padding) 0;
    background: var(--light-bg);
}

.z2f920article-section .row > .col {
    display: flex;
    min-width: 0;
}

.z2f920article-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.z2f920article-card {
    background: var(--surface);
    overflow: hidden;
    transition: all var(--transition-speed) var(--transition-easing);
    width: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.z2f920article-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.z2f920article-thumb {
    display: block;
    overflow: hidden;
}

.z2f920thumb-home {
    width: 100%;
    height: 140px;
    object-fit: cover;
    transition: transform var(--transition-speed) ease;
}

.z2f920article-card:hover .z2f920thumb-home {
    transform: scale(1.05);
}

.z2f920article-body {
    padding: 1rem 1.15rem 1.25rem;
}

.z2f920article-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.z2f920article-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.45;
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.z2f920article-title a {
    color: var(--gray-900);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.z2f920article-title a:hover {
    color: var(--primary-color);
}

/* ===== 页脚 ===== */
.z2f920footer {
    background: var(--gray-900);
    padding: 60px 0 30px;
    color: rgba(255, 255, 255, 0.7);
}

.z2f920footer-brand img {
    max-width: 100%;
    height: auto;
}

.z2f920footer-title {
    color: white;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.z2f920footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.z2f920footer-links li {
    margin-bottom: 0.6rem;
}

.z2f920footer-link {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
    font-size: 0.925rem;
}

.z2f920footer-link:hover {
    color: var(--accent-color);
}

.z2f920footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.z2f920footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.z2f920footer-bottom a:hover {
    color: var(--accent-color);
}

.z2f920friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.z2f920friend-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.875rem;
    line-height: 1.6;
    word-break: break-word;
}

.z2f920friend-links a:hover {
    color: var(--accent-color);
}

/* ===== 旧版兼容（列表页/内容页） ===== */
.z2f920feature-card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-speed) var(--transition-easing),
                box-shadow var(--transition-speed) var(--transition-easing);
    border: 1px solid var(--border-color);
    height: 100%;
    background: white;
}

.z2f920feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.z2f920feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    background: rgba(124, 58, 237, 0.1);
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
}

.z2f920security-features {
    background: rgba(124, 58, 237, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
}

.z2f920feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.z2f920feature-item:last-child {
    margin-bottom: 0;
}

.z2f920feature-item i {
    color: var(--primary-color);
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.z2f920feature-item span {
    color: var(--gray-700);
}

.z2f920info-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.z2f920info-item:last-child {
    margin-bottom: 0;
}

.z2f920info-item i {
    color: var(--primary-color);
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.z2f920info-item span {
    color: var(--gray-700);
}

.z2f920download-info {
    background: rgba(124, 58, 237, 0.05);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
}

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

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

.btn {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-speed) var(--transition-easing);
    touch-action: manipulation;
}

.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);
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
    .z2f920hero-title {
        font-size: 2.5rem;
    }

    .z2f920bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z2f920bento-large {
        grid-column: span 2;
    }

    .z2f920bento-wide {
        grid-column: span 2;
    }
}

@media (max-width: 991px) {
    .z2f920hero-section {
        padding: var(--section-padding) 0 calc(var(--section-padding) + 8px);
    }

    .z2f920hero-title {
        font-size: 2.25rem;
    }

    .z2f920hero-trust {
        gap: 1.25rem;
    }

    .z2f920hero-float-card {
        display: none;
    }

    .z2f920stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .z2f920bento-grid {
        grid-template-columns: 1fr;
    }

    .z2f920svc-grid {
        grid-template-columns: 1fr;
    }

    .z2f920bento-large,
    .z2f920bento-wide {
        grid-column: span 1;
    }

    .z2f920section-header h2 {
        font-size: 1.65rem;
    }

    :root {
        --section-padding: 56px;
        --card-padding: 1.25rem;
    }

    .z2f920stats-section {
        padding: 48px 0;
    }

    .z2f920navbar .navbar-collapse {
        margin-top: 0.5rem;
        max-height: 70vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        background: white;
        padding: 0.5rem 0.75rem;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-md);
        border: var(--card-border);
    }

    .z2f920navbar .navbar-nav {
        width: 100%;
    }

    .z2f920navbar .nav-item {
        width: 100%;
    }

    .z2f920navbar .nav-link {
        display: block;
        width: 100%;
        padding: 0.7rem 0.5rem !important;
        border-bottom: 1px solid var(--border-color);
    }

    .z2f920navbar .nav-item:last-child .nav-link {
        border-bottom: none;
    }
}

@media (max-width: 767px) {
    html {
        scroll-padding-top: 64px;
    }

    .z2f920section-header {
        margin-bottom: 1.75rem;
    }

    .z2f920section-header h2 {
        font-size: 1.5rem;
    }

    .z2f920section-desc {
        font-size: 0.95rem;
        line-height: 1.7;
    }

    .z2f920stats-heading {
        font-size: 1.2rem;
    }

    .z2f920stats-intro {
        margin-bottom: 1.5rem;
    }

    .z2f920quick-strip-inner {
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.25rem;
        margin: 0;
        padding-left: 0;
        padding-right: 0;
        scrollbar-width: thin;
    }

    .z2f920quick-item {
        flex-shrink: 0;
    }

    .z2f920hero-section {
        padding-top: calc(var(--section-padding) - 8px);
        padding-bottom: var(--section-padding);
    }

    .z2f920hero-title {
        font-size: 1.85rem;
        margin-bottom: 1rem;
    }

    .z2f920hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 0.75rem;
    }

    .z2f920hero-desc {
        margin-bottom: 1.25rem;
    }

    .z2f920hero-badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.85rem;
        margin-bottom: 1rem;
        max-width: 100%;
    }

    .z2f920hero-trust {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
        margin-bottom: 1.5rem;
        padding: 1rem 0;
    }

    .z2f920trust-item {
        text-align: center;
        min-width: 0;
    }

    .z2f920trust-num {
        font-size: 1.15rem;
    }

    .z2f920trust-label {
        font-size: 0.72rem;
    }

    .z2f920hero-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }

    .z2f920hero-buttons .btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem 1.25rem;
    }

    .z2f920hero-image-container {
        padding: 0.5rem 0 0;
    }

    .z2f920hero-image {
        max-width: 240px;
    }

    .z2f920hero-points li {
        font-size: 0.85rem;
    }

    .z2f920svc-grid {
        gap: 0.9rem;
    }

    .z2f920bento-grid {
        gap: 1rem;
    }

    .z2f920stat-number {
        font-size: 1.85rem;
    }

    .z2f920stat-label {
        font-size: 0.85rem;
    }

    .z2f920stat-icon {
        width: 44px;
        height: 44px;
        font-size: 1.15rem;
        margin-bottom: 0.75rem;
    }

    .z2f920register-title {
        font-size: 1.5rem;
    }

    .z2f920register-desc {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .z2f920register-section .btn {
        width: 100%;
        justify-content: center;
    }

    .z2f920reg-step {
        padding: 1rem 0;
    }

    .z2f920reg-step-content h4 {
        font-size: 1rem;
    }

    .z2f920reg-step-content p {
        font-size: 0.875rem;
    }

    .z2f920install-guide h3 {
        font-size: 1.1rem;
    }

    .z2f920install-guide .row {
        --bs-gutter-y: 0.75rem;
    }

    .z2f920guide-step {
        padding: 1rem 0.75rem;
    }

    .z2f920download-section .row {
        --bs-gutter-y: 1rem;
    }

    .z2f920download-card-top {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding-right: 0;
        gap: 0.75rem;
    }

    .z2f920download-card-top > div:last-child {
        text-align: center;
    }

    .z2f920download-card-featured {
        padding-top: 2.5rem;
    }

    .z2f920download-badge {
        top: 0.85rem;
        right: 0.85rem;
    }

    .z2f920download-action .btn {
        width: 100%;
        justify-content: center;
        white-space: normal;
    }

    .z2f920faq-accordion .accordion-button {
        font-size: 0.925rem;
        padding: 0.9rem 1rem;
        padding-right: 2.5rem;
    }

    .z2f920faq-accordion .accordion-body {
        padding: 0 1rem 1rem;
        font-size: 0.9rem;
    }

    .z2f920article-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        margin-bottom: 1.75rem;
    }

    .z2f920article-header .btn {
        width: 100%;
        text-align: center;
    }

    .z2f920thumb-home {
        height: 140px;
    }

    .z2f920article-body {
        padding: 0.85rem;
    }

    .z2f920article-title {
        font-size: 0.9rem;
    }

    .z2f920navbar {
        padding: 0.5rem 0;
    }

    .z2f920navbar-brand img {
        height: 38px;
    }

    .z2f920navbar .navbar-toggler {
        min-width: 44px;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .z2f920about-card:hover,
    .z2f920bento-item:hover,
    .z2f920download-card:hover,
    .z2f920security-card:hover,
    .z2f920certificate-card:hover,
    .z2f920article-card:hover {
        transform: none;
    }

    .z2f920about-icon,
    .z2f920bento-icon {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .z2f920thumb-list,
    .z2f920thumb-related {
        height: 72px !important;
    }

    .z2f920thumb-side {
        height: 50px !important;
    }

    .z2f920thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        margin: 0 auto;
    }

    .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) {
    .z2f920hero-kicker {
        font-size: 0.7rem;
        letter-spacing: 0.04em;
    }

    .z2f920hero-title {
        font-size: 1.55rem;
    }

    .z2f920hero-desc {
        font-size: 0.85rem;
    }

    .z2f920hero-badge span {
        line-height: 1.4;
    }

    .z2f920hero-trust {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.65rem;
    }

    .z2f920trust-num {
        font-size: 1rem;
    }

    .z2f920trust-label {
        font-size: 0.68rem;
    }

    .z2f920stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.65rem;
    }

    .z2f920stat-item {
        padding: 0.85rem 0.5rem;
    }

    .z2f920stat-number {
        font-size: 1.5rem;
    }

    .z2f920stat-label {
        font-size: 0.78rem;
        line-height: 1.35;
    }

    .z2f920stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .z2f920section-header {
        margin-bottom: 1.5rem;
    }

    .z2f920section-header h2 {
        font-size: 1.35rem;
    }

    .z2f920section-desc {
        font-size: 0.9rem;
    }

    :root {
        --section-padding: 44px;
        --card-padding: 1rem;
    }

    .z2f920stats-section {
        padding: 36px 0;
    }

    .z2f920about-card h3,
    .z2f920bento-item h3,
    .z2f920download-card h3 {
        font-size: 1.05rem;
    }

    .z2f920about-band .row > [class*="col-"] {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .z2f920about-pill {
        padding: 0.85rem 0.95rem;
    }

    .z2f920svc-grid {
        gap: 0.75rem;
    }

    .z2f920platform-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .z2f920register-title {
        font-size: 1.35rem;
    }

    .z2f920reg-step-num {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .z2f920thumb-home {
        height: 120px;
    }

    .z2f920article-section .row {
        --bs-gutter-y: 0.75rem;
        --bs-gutter-x: 0.65rem;
    }

    .z2f920thumb-list,
    .z2f920thumb-related {
        height: 64px !important;
    }

    .z2f920thumb-side {
        height: 46px !important;
    }

    .z2f920thumb-cover {
        height: 150px !important;
    }

    .z2f920footer {
        padding: 36px 0 18px;
        text-align: center;
    }

    .z2f920footer-title {
        margin-top: 1rem;
    }

    .z2f920footer-bottom {
        font-size: 0.82rem;
        line-height: 1.7;
    }

    .z2f920friend-links {
        justify-content: center;
        gap: 0.4rem 0.75rem;
    }

    .pagebar .pagelist {
        display: flex;
        flex-wrap: wrap;
        gap: 0.35rem;
    }
}

@media (max-width: 400px) {
    .z2f920hero-trust {
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .z2f920trust-item {
        text-align: center;
    }
}

.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;
}

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

.form-control {
    width: 100%;
}

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

.card {
    margin-bottom: 1rem;
}

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

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