:root {
    --primary-color: #0d9488;
    --primary-dark: #0f766e;
    --primary-light: #14b8a6;
    --secondary-color: #134e4a;
    --accent-color: #f59e0b;
    --accent-hover: #d97706;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --light-bg: #f0fdfa;
    --surface: #ffffff;
    --dark-bg: #0f172a;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 48px rgba(13, 148, 136, 0.12);
    --radius: 12px;
    --radius-lg: 16px;
    --section-py: 4rem;
    --card-pad: 1.5rem;
    --transition-speed: 0.3s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

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

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

/* 全局容器与栅格防溢出 */
.zf2b46container.container,
.container {
    padding-left: 1rem;
    padding-right: 1rem;
}

.zf2b46row.row,
.zf2b46row.row > [class*="col"] {
    min-width: 0;
}

section {
    overflow-x: clip;
}

/* ========== 导航栏 ========== */
.zf2b46navbar {
    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: 1030;
}

.zf2b46navbar-brand img {
    height: 42px;
}

.zf2b46nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 8px;
    transition: color var(--transition-speed), background var(--transition-speed);
}

.zf2b46nav-link:hover,
.zf2b46nav-item.active .zf2b46nav-link {
    color: var(--primary-color) !important;
    background: rgba(13, 148, 136, 0.08);
}

.zf2b46nav-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff !important;
    border-radius: 10px;
    padding: 0.5rem 1.1rem !important;
    margin-left: 0.5rem;
}

.zf2b46nav-cta:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color)) !important;
    color: #fff !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ========== 英雄区 ========== */
.zf2b46hero-section {
    background: linear-gradient(145deg, #0f766e 0%, #134e4a 45%, #0f172a 100%);
    color: #fff;
    padding: 4rem 0 3.5rem;
    position: relative;
    overflow: hidden;
}

.zf2b46hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 90% 20%, rgba(20, 184, 166, 0.35), transparent),
        radial-gradient(ellipse 50% 40% at 10% 80%, rgba(245, 158, 11, 0.15), transparent);
    pointer-events: none;
}

.zf2b46hero-content {
    position: relative;
    z-index: 1;
}

.zf2b46hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
}

.zf2b46hero-title {
    font-size: clamp(1.85rem, 4vw, 3.25rem);
    font-weight: 800;
    margin-bottom: 1.25rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.zf2b46hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    margin-bottom: 1.75rem;
    opacity: 0.92;
    max-width: 540px;
    line-height: 1.75;
}

.zf2b46hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.zf2b46hero-buttons .btn {
    padding: 0.65rem 1.15rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
    line-height: 1.35;
    transition: all var(--transition-speed) var(--transition-easing);
}

.zf2b46btn-accent {
    background: var(--accent-color);
    color: var(--dark-bg);
    border: none;
}

.zf2b46btn-accent:hover {
    background: var(--accent-hover);
    color: var(--dark-bg);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.35);
}

.zf2b46btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    background: transparent;
}

.zf2b46btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: #fff;
    transform: translateY(-2px);
}

.zf2b46btn-primary-solid {
    background: var(--primary-light);
    border: none;
    color: #fff;
}

.zf2b46btn-primary-solid:hover {
    background: #2dd4bf;
    color: #fff;
    transform: translateY(-2px);
}

.zf2b46hero-image-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.zf2b46hero-image {
    width: 100%;
    max-width: 320px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: contain;
}

.zf2b46hero-image-shadow {
    display: none;
}

.zf2b46hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.zf2b46hero-trust-item {
    font-size: 0.85rem;
    opacity: 0.85;
}

.zf2b46hero-trust-item i {
    color: var(--accent-color);
    margin-right: 0.35rem;
}

/* ========== 通用区块标题 ========== */
.zf2b46section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
    padding: 0 0.5rem;
}

.zf2b46section-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary-color);
    background: rgba(13, 148, 136, 0.1);
    padding: 0.35rem 0.9rem;
    border-radius: 50px;
    margin-bottom: 0.75rem;
}

.zf2b46section-header h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.zf2b46section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin: 0;
}

/* ========== 简介区 ========== */
.zf2b46intro-section {
    padding: var(--section-py) 0;
    background: var(--light-bg);
}

.zf2b46intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.zf2b46intro-text h2 {
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.zf2b46intro-text p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.zf2b46intro-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.zf2b46intro-highlight {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.125rem 1rem;
    border: 1px solid var(--border-color);
    transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
    overflow: hidden;
    min-height: 0;
}

.zf2b46intro-highlight:hover {
    box-shadow: var(--shadow-sm);
    border-color: rgba(13, 148, 136, 0.35);
}

.zf2b46intro-highlight i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.zf2b46intro-highlight h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.zf2b46intro-highlight p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* ========== 特点卡片 ========== */
.zf2b46features-section {
    padding: var(--section-py) 0;
    background: #fff;
}

.zf2b46features-section .row.g-4 {
    --bs-gutter-x: 1.25rem;
    --bs-gutter-y: 1.25rem;
}

.zf2b46feature-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--card-pad) 1.25rem;
    height: 100%;
    background: var(--surface);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    text-align: center;
    overflow: hidden;
    word-wrap: break-word;
}

.zf2b46feature-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.zf2b46feature-icon {
    width: 56px;
    height: 56px;
    font-size: 1.45rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(20, 184, 166, 0.06));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.zf2b46feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-color);
}

.zf2b46feature-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
}

/* ========== 统计数据 ========== */
.zf2b46stats-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
    color: #fff;
    padding: 3rem 0;
}

.zf2b46stat-item {
    text-align: center;
    padding: 1rem;
}

.zf2b46stat-number {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 0.35rem;
    color: var(--accent-color);
}

.zf2b46stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ========== 注册流程 ========== */
.zf2b46register-section {
    padding: var(--section-py) 0;
    background: #fff;
}

.zf2b46steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    position: relative;
}

.zf2b46step-card {
    text-align: center;
    padding: 1.25rem 1rem;
    position: relative;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.zf2b46step-num {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    margin: 0 auto 1rem;
}

.zf2b46step-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.zf2b46step-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
}

/* ========== 下载区 ========== */
.zf2b46download-section {
    padding: var(--section-py) 0;
    background: var(--light-bg);
}

.zf2b46download-section .row.g-4 {
    --bs-gutter-x: 1.25rem;
    --bs-gutter-y: 1.25rem;
}

.zf2b46download-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.zf2b46download-card:hover {
    border-color: rgba(13, 148, 136, 0.4);
    box-shadow: var(--shadow-md);
}

.zf2b46download-card-header {
    padding: 1.125rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.zf2b46download-card-header > div:last-child {
    min-width: 0;
    flex: 1;
}

.zf2b46download-card-header h3 {
    font-size: 1rem;
    line-height: 1.3;
}

.zf2b46ios-card .zf2b46download-card-header {
    background: linear-gradient(135deg, #1e293b, #334155);
    color: #fff;
}

.zf2b46android-card .zf2b46download-card-header {
    background: linear-gradient(135deg, #059669, #047857);
    color: #fff;
}

.zf2b46windows-card .zf2b46download-card-header {
    background: linear-gradient(135deg, #0d9488, #0f766e);
    color: #fff;
}

.zf2b46platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

.zf2b46download-card-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.zf2b46download-info {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    flex: 1;
}

.zf2b46info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
    word-break: break-word;
}

.zf2b46info-item span {
    flex: 1;
    min-width: 0;
}

.zf2b46info-item:last-child {
    margin-bottom: 0;
}

.zf2b46info-item i {
    color: var(--primary-color);
    margin-top: 0.2rem;
}

.zf2b46download-action {
    margin-top: auto;
}

.zf2b46download-action .btn {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    color: #fff;
    white-space: normal;
    line-height: 1.4;
}

.zf2b46download-action .btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
    color: #fff;
}

/* ========== 安全区 ========== */
.zf2b46security-section {
    padding: var(--section-py) 0;
    background: #fff;
}

.zf2b46security-section .row.g-4,
.zf2b46security-certificates .row.g-4 {
    --bs-gutter-x: 1.25rem;
    --bs-gutter-y: 1.25rem;
}

.zf2b46security-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: var(--card-pad);
    height: 100%;
    overflow: hidden;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.zf2b46security-card:hover {
    border-color: rgba(13, 148, 136, 0.35);
    box-shadow: var(--shadow-sm);
}

.zf2b46security-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.zf2b46security-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.zf2b46security-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zf2b46feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.zf2b46feature-item i {
    color: var(--primary-color);
    font-size: 0.85rem;
}

.zf2b46certificate-card {
    background: var(--light-bg);
    border-radius: var(--radius);
    padding: var(--card-pad);
    text-align: center;
    height: 100%;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.zf2b46certificate-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 auto 1rem;
    background: var(--primary-color);
    color: #fff;
}

.zf2b46certificate-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.zf2b46certificate-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
}

/* ========== FAQ ========== */
.zf2b46faq-section {
    padding: var(--section-py) 0;
    background: var(--light-bg);
}

.zf2b46faq-accordion {
    --bs-accordion-border-width: 0;
    --bs-accordion-border-radius: var(--radius);
    --bs-accordion-inner-border-radius: var(--radius);
    --bs-accordion-btn-padding-x: 1.25rem;
    --bs-accordion-btn-padding-y: 1rem;
    --bs-accordion-body-padding-x: 1.25rem;
    --bs-accordion-body-padding-y: 1rem;
}

.zf2b46faq-accordion .accordion-item {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius) !important;
    margin-bottom: 0.625rem;
    overflow: hidden;
    background: var(--surface);
}

.zf2b46faq-accordion .accordion-item:last-child {
    margin-bottom: 0;
}

.zf2b46faq-accordion .accordion-button {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
    background: var(--surface);
    box-shadow: none;
    padding: 1rem 1.25rem;
    line-height: 1.45;
}

.zf2b46faq-accordion .accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background: rgba(13, 148, 136, 0.06);
}

.zf2b46faq-accordion .accordion-button:focus {
    box-shadow: none;
    border-color: transparent;
}

.zf2b46faq-accordion .accordion-body {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
    padding: 0 1.25rem 1.125rem;
}

/* ========== 文章区 ========== */
.zf2b46article-section {
    padding: var(--section-py) 0;
    background: #fff;
}

.zf2b46article-section .row {
    --bs-gutter-x: 1rem;
    --bs-gutter-y: 1rem;
}

.zf2b46article-section .card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    height: 100%;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.zf2b46article-section .card:hover {
    border-color: rgba(13, 148, 136, 0.35);
    box-shadow: var(--shadow-sm);
}

.zf2b46article-section .card-body {
    padding: 0.875rem 1rem;
}

.zf2b46thumb-home {
    height: 130px;
    object-fit: cover;
    width: 100%;
    display: block;
}

.zf2b46thumb-side-wrap {
    width: 72px;
    flex: 0 0 72px;
}

.zf2b46thumb-side {
    width: 100%;
    height: 54px;
    object-fit: cover;
    display: block;
    border-radius: 8px;
}

.zf2b46article-section .card-body h3 a {
    color: var(--text-color);
    font-weight: 600;
}

.zf2b46article-section .card-body h3 a:hover {
    color: var(--primary-color);
}

/* ========== 页脚 ========== */
.zf2b46footer {
    background: var(--dark-bg);
    padding: 4rem 0 2rem;
    color: #94a3b8;
}

.zf2b46footer-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.zf2b46footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.zf2b46footer-links li {
    margin-bottom: 0.6rem;
}

.zf2b46footer-link {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.92rem;
    transition: color var(--transition-speed);
}

.zf2b46footer-link:hover {
    color: var(--primary-light);
}

.zf2b46footer p {
    font-size: 0.92rem;
    line-height: 1.7;
}

.zf2b46friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.zf2b46friend-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.88rem;
}

.zf2b46friend-links a:hover {
    color: var(--primary-light);
}

.zf2b46footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.5rem;
    margin-top: 2rem;
    text-align: center;
}

.zf2b46footer-bottom a {
    color: #94a3b8;
    text-decoration: none;
}

.zf2b46footer-bottom a:hover {
    color: var(--primary-light);
}

/* ========== 内页/列表页 ========== */
.zf2b46page-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
    color: #fff;
    padding: 2.5rem 0;
    margin-bottom: 0;
}

.zf2b46page-hero h1 {
    font-size: clamp(1.35rem, 3vw, 1.75rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.zf2b46page-hero p {
    opacity: 0.88;
    margin: 0;
    font-size: 0.95rem;
}

.zf2b46content-section {
    padding: 3rem 0 4rem;
    background: var(--light-bg);
}

.zf2b46sidebar-card,
.zf2b46content-section .card.shadow-sm {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm) !important;
    margin-bottom: 1.25rem;
    overflow: hidden;
}

.zf2b46content-section .card-body {
    padding: 1.25rem;
}

.zf2b46sidebar-card .card-body h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.zf2b46article-content {
    line-height: 1.85;
    font-size: 1rem;
}

.zf2b46article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
}

/* ========== 按钮通用 ========== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

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

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

/* ========== 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;
}

/* ========== 响应式 ========== */
@media (max-width: 991px) {
    .zf2b46intro-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }

    .zf2b46steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .zf2b46hero-section {
        padding: 3rem 0 2.5rem;
    }

    .zf2b46hero-subtitle {
        max-width: none;
    }

    .zf2b46hero-image {
        max-width: 260px;
    }

    .zf2b46security-section .row.g-4 > [class*="col-lg-3"] {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

@media (max-width: 767px) {
    html {
        font-size: 15px;
    }

    :root {
        --section-py: 2.75rem;
        --card-pad: 1.125rem;
    }

    .zf2b46container.container,
    .container {
        padding-left: max(0.875rem, env(safe-area-inset-left, 0px));
        padding-right: max(0.875rem, env(safe-area-inset-right, 0px));
    }

    /* 导航 */
    .zf2b46navbar {
        padding: 0.5rem 0;
    }

    .zf2b46navbar-brand img {
        height: 36px;
    }

    .zf2b46navbar .navbar-collapse {
        margin-top: 0.5rem;
        max-height: min(75vh, 520px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        padding: 0.5rem;
        box-shadow: var(--shadow-md);
    }

    .zf2b46navbar .navbar-nav {
        width: 100%;
        margin: 0 !important;
    }

    .zf2b46navbar .nav-item {
        width: 100%;
    }

    .zf2b46navbar .nav-link {
        display: block;
        width: 100%;
        text-align: left;
        padding: 0.55rem 0.65rem !important;
        font-size: 0.9rem;
    }

    .zf2b46nav-cta {
        display: block;
        width: 100%;
        margin: 0.35rem 0 0;
        text-align: center;
        padding: 0.6rem 1rem !important;
    }

    /* 英雄区 */
    .zf2b46hero-section {
        padding: 2.25rem 0 2rem;
    }

    .zf2b46hero-section .row {
        --bs-gutter-y: 1.25rem;
    }

    .zf2b46hero-badge {
        font-size: 0.75rem;
        padding: 0.35rem 0.75rem;
        line-height: 1.45;
        max-width: 100%;
        white-space: normal;
    }

    .zf2b46hero-title {
        font-size: clamp(1.45rem, 6vw, 1.85rem);
        margin-bottom: 0.875rem;
    }

    .zf2b46hero-subtitle {
        font-size: 0.92rem;
        margin-bottom: 1.25rem;
        line-height: 1.65;
    }

    .zf2b46hero-buttons {
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 1rem;
    }

    .zf2b46hero-buttons .btn {
        width: 100%;
        justify-content: center;
        padding: 0.7rem 1rem;
    }

    .zf2b46hero-image-container {
        padding: 0.5rem 0 0;
    }

    .zf2b46hero-image {
        max-width: min(240px, 72vw);
    }

    .zf2b46hero-trust {
        flex-direction: column;
        gap: 0.5rem;
        margin-top: 1.25rem;
        padding-top: 1rem;
    }

    .zf2b46hero-trust-item {
        font-size: 0.8rem;
        line-height: 1.4;
    }

    /* 通用区块 */
    .zf2b46section-header {
        margin-bottom: 1.5rem;
    }

    .zf2b46section-header h2 {
        font-size: clamp(1.25rem, 5vw, 1.5rem);
    }

    .zf2b46section-header p {
        font-size: 0.9rem;
    }

    .zf2b46section-eyebrow {
        font-size: 0.72rem;
        letter-spacing: 0.08em;
    }

    .zf2b46intro-text h2 {
        font-size: clamp(1.2rem, 4.5vw, 1.45rem);
    }

    .zf2b46intro-text p {
        font-size: 0.9rem;
    }

    .zf2b46intro-highlights {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .zf2b46steps {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .zf2b46register-section .btn-lg {
        width: 100%;
        font-size: 0.95rem;
        padding: 0.75rem 1rem;
    }

    .zf2b46features-section,
    .zf2b46intro-section,
    .zf2b46download-section,
    .zf2b46security-section,
    .zf2b46faq-section,
    .zf2b46article-section,
    .zf2b46register-section {
        padding: var(--section-py) 0;
    }

    .zf2b46download-section .row.g-4,
    .zf2b46features-section .row.g-4,
    .zf2b46security-section .row.g-4 {
        --bs-gutter-y: 0.875rem;
        --bs-gutter-x: 0.875rem;
    }

    .zf2b46security-section .row.g-4 > [class*="col-"] {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .zf2b46feature-card {
        padding: var(--card-pad) 1rem;
    }

    .zf2b46download-card-header {
        padding: 1rem;
    }

    .zf2b46download-card-body {
        padding: 1rem;
    }

    .zf2b46stat-number {
        font-size: 1.75rem;
    }

    .zf2b46stat-label {
        font-size: 0.85rem;
    }

    .zf2b46stats-section {
        padding: 2.25rem 0;
    }

    /* FAQ */
    .zf2b46faq-accordion .accordion-button {
        font-size: 0.88rem;
        padding: 0.875rem 1rem;
    }

    .zf2b46faq-accordion .accordion-body {
        font-size: 0.85rem;
        padding: 0 1rem 1rem;
    }

    /* 文章区 */
    .zf2b46article-section .d-flex.flex-column.flex-md-row {
        align-items: stretch !important;
    }

    .zf2b46article-section .btn-outline-primary {
        width: 100%;
        text-align: center;
    }

    .zf2b46article-section .row {
        --bs-gutter-y: 0.75rem;
    }

    .zf2b46thumb-home {
        height: 120px !important;
    }

    .zf2b46article-section .card-body h3,
    .zf2b46article-section .card-body .h6 {
        font-size: 0.9rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* 内页 / 列表页 */
    .zf2b46page-hero {
        padding: 1.75rem 0;
    }

    .zf2b46page-hero h1 {
        font-size: clamp(1.2rem, 5vw, 1.45rem);
        line-height: 1.35;
    }

    .zf2b46page-hero p {
        font-size: 0.85rem;
        line-height: 1.55;
    }

    .zf2b46content-section {
        padding: 1.75rem 0 2.5rem;
    }

    .zf2b46content-section .card-body {
        padding: 1rem;
    }

    .listbox .e2 li h2.h5 {
        font-size: 0.95rem;
        line-height: 1.35;
    }

    .listbox .e2 li p {
        font-size: 0.85rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .listbox .e2 li .small {
        font-size: 0.75rem;
    }

    .zf2b46thumb-list {
        width: 100%;
        height: 80px !important;
        object-fit: cover;
        display: block;
    }

    .zf2b46thumb-related {
        height: 80px !important;
        object-fit: cover;
    }

    .zf2b46thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: auto !important;
        min-height: 160px;
        max-height: 220px;
        object-fit: cover;
    }

    .zf2b46content-section aside .d-flex.gap-2 {
        align-items: flex-start;
    }

    .zf2b46content-section aside .d-flex.gap-2 > a:last-child {
        flex: 1;
        min-width: 0;
        font-size: 0.85rem;
        line-height: 1.4;
        word-break: break-word;
    }

    /* 页脚 */
    .zf2b46footer {
        padding: 2.5rem 0 1.5rem;
        text-align: center;
    }

    .zf2b46footer .row > [class*="col"]:first-child .zf2b46footer-title {
        margin-top: 0;
    }

    .zf2b46footer-title {
        margin-top: 1.25rem;
    }

    .zf2b46friend-links {
        justify-content: center;
        gap: 0.35rem 0.85rem;
    }

    .zf2b46footer-bottom {
        font-size: 0.85rem;
        line-height: 1.6;
    }
}

@media (max-width: 575px) {
    html {
        font-size: 14px;
    }

    :root {
        --section-py: 2.25rem;
    }

    .zf2b46stat-item {
        padding: 0.5rem 0.35rem;
    }

    .zf2b46stat-number {
        font-size: 1.5rem;
    }

    .zf2b46stat-label {
        font-size: 0.78rem;
        line-height: 1.35;
    }

    /* 列表项：小屏改为上图下文 */
    .listbox .e2 li .row.g-3 {
        flex-direction: column;
    }

    .listbox .e2 li [class*="col-"] {
        width: 100%;
        max-width: 100%;
    }

    .zf2b46thumb-list {
        height: 150px !important;
        border-radius: var(--radius);
    }

    .listbox .e2 li h2.h5 {
        margin-top: 0.25rem;
    }

    .zf2b46thumb-side-wrap {
        width: 64px;
        flex: 0 0 64px;
    }

    .zf2b46thumb-side {
        height: 48px !important;
    }

    .zf2b46certificate-card,
    .zf2b46security-card {
        padding: 1rem;
    }
}

@media (max-width: 380px) {
    .zf2b46hero-title {
        font-size: 1.35rem;
    }

    .zf2b46hero-badge {
        font-size: 0.7rem;
    }

    .zf2b46navbar .nav-link {
        font-size: 0.85rem;
    }

    .zf2b46footer-bottom p {
        display: flex;
        flex-direction: column;
        gap: 0.35rem;
        align-items: center;
    }

    .zf2b46footer-bottom a {
        display: inline-block;
    }
}

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