/* ============================================================
   CSS Variables & Reset
   ============================================================ */
:root {
    --brand: #2563eb;
    --brand-light: #3b82f6;
    --brand-dark: #1d4ed8;
    --bg-light: #f5faff;
    --bg-white: #ffffff;
    --text-primary: #0b1e3a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --shadow-sm: 0 4px 24px rgba(37, 99, 235, 0.08);
    --shadow-md: 0 8px 40px rgba(37, 99, 235, 0.12);
    --shadow-lg: 0 16px 64px rgba(37, 99, 235, 0.16);
    --radius: 20px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.3);
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-text: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --trust-green: #10b981;
    --trust-gold: #f59e0b;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-light);
}
::-webkit-scrollbar-thumb {
    background: var(--brand);
    border-radius: 10px;
}


/* ============================================================
   Utilities
   ============================================================ */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
}

.text-center {
    text-align: center;
}
.mt-8 {
    margin-top: 8px;
}
.mb-8 {
    margin-bottom: 8px;
}
.gap-8 {
    gap: 8px;
}


/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--brand);
    border: 2px solid var(--brand);
}
.btn-outline:hover {
    background: var(--brand);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
}

.btn-white {
    background: #fff;
    color: var(--brand);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.85rem;
}

.btn-download {
    background: var(--gradient-primary);
    color: #fff;
    padding: 10px 32px;
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.30);
}
.btn-download:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.45);
}


/* ============================================================
   Section Common
   ============================================================ */
.section {
    padding: 80px 0;
}
.section-alt {
    background: var(--bg-white);
}
.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 12px;
}
.section-title .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-sub {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto 48px;
}


/* ============================================================
   Navbar (全局)
   ============================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(37, 99, 235, 0.06);
}
.navbar.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--brand);
    letter-spacing: -0.02em;
}
.nav-brand .brand-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}
.nav-links li a {
    padding: 8px 16px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}
.nav-links li a:hover {
    color: var(--brand);
    background: rgba(37, 99, 235, 0.06);
}
.nav-links li a .nav-prefix {
    color: var(--brand);
    font-weight: 600;
}

.nav-download-btn {
    background: var(--gradient-primary);
    color: #fff !important;
    padding: 8px 22px !important;
    border-radius: 40px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}
.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.35);
    background: var(--gradient-primary) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
    background: none;
    border: none;
}
.nav-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}


/* ============================================================
   Homepage – Hero
   ============================================================ */
.hero {
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 70%;
    height: 120%;
    background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
    pointer-events: none;
}
.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero-image img {
    width: 100%;
    max-width: 480px;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(245, 250, 255, 0.6));
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}
.hero-image img:hover {
    transform: translateY(-4px);
    box-shadow: 0 24px 80px rgba(37, 99, 235, 0.18);
}

.hero-text .brand-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.08);
    color: var(--brand);
    padding: 4px 16px;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 16px;
    border: 1px solid rgba(37, 99, 235, 0.08);
}
.hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 16px;
}
.hero-text h1 .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-text .desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 24px;
    line-height: 1.7;
}
.hero-text .platform-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}
.hero-text .platform-tags span {
    background: rgba(37, 99, 235, 0.06);
    padding: 4px 14px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid rgba(37, 99, 235, 0.06);
}
.hero-text .actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}


/* ============================================================
   Homepage – Advantages (产品介绍)
   ============================================================ */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.adv-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    cursor: default;
    position: relative;
    overflow: hidden;
}
.adv-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}
.adv-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.10);
}
.adv-card:hover::before {
    opacity: 1;
}
.adv-card .icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(37, 99, 235, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--brand);
}
.adv-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.adv-card h3 .prefix {
    color: var(--brand);
}
.adv-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}


/* ============================================================
   Homepage – Stats (技术参数)
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.stat-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
}
.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.stat-item .number {
    font-size: 2.8rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}
.stat-item .label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 4px;
}


/* ============================================================
   Homepage – Pricing
   ============================================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 960px;
    margin: 0 auto;
}
.pricing-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 36px 28px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    position: relative;
    text-align: center;
}
.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.pricing-card.popular {
    border-color: var(--brand);
    box-shadow: 0 8px 40px rgba(37, 99, 235, 0.12);
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}
.pricing-card.popular .badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: #fff;
    padding: 4px 20px;
    border-radius: 40px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}
.pricing-card .plan-name {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.pricing-card .plan-price {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--brand);
    margin: 12px 0 4px;
}
.pricing-card .plan-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}
.pricing-card .plan-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}
.pricing-card ul {
    list-style: none;
    text-align: left;
    margin: 16px 0 24px;
    padding: 0;
}
.pricing-card ul li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.pricing-card ul li::before {
    content: '✓';
    color: var(--brand);
    font-weight: 700;
}
.pricing-card .btn {
    width: 100%;
    justify-content: center;
}


/* ============================================================
   Homepage – Downloads (首页下载入口)
   ============================================================ */
.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.download-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px 24px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}
.download-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.10);
}
.download-card:hover::before {
    opacity: 1;
}
.download-card .platform-icon {
    font-size: 3.2rem;
    margin-bottom: 12px;
    line-height: 1;
}
.download-card h3 {
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 4px;
}
.download-card .platform-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 6px;
}
.download-card .version {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(37, 99, 235, 0.04);
    padding: 2px 14px;
    border-radius: 30px;
    margin-bottom: 16px;
    display: inline-block;
}
.download-card .btn-download {
    width: 100%;
    max-width: 200px;
    justify-content: center;
}
.download-card .system-req {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}
.download-card .download-count {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 8px;
    background: rgba(37, 99, 235, 0.04);
    padding: 2px 14px;
    border-radius: 30px;
}

/* 信任徽章（下载页专用） */
.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 14px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(37, 99, 235, 0.06);
    width: 100%;
}
.trust-badges .badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    background: rgba(37, 99, 235, 0.04);
    padding: 3px 10px;
    border-radius: 30px;
    transition: var(--transition);
    font-weight: 500;
}
.trust-badges .badge:hover {
    background: rgba(16, 185, 129, 0.08);
    color: var(--trust-green);
}
.trust-badges .badge.badge-green {
    color: var(--trust-green);
    background: rgba(16, 185, 129, 0.08);
}
.trust-badges .badge.badge-gold {
    color: var(--trust-gold);
    background: rgba(245, 158, 11, 0.08);
}
.trust-badges .badge.badge-blue {
    color: var(--brand);
    background: rgba(37, 99, 235, 0.08);
}

/* 安全声明横幅（下载页） */
.security-banner {
    margin-top: 32px;
    padding: 20px 28px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.04), rgba(37, 99, 235, 0.04));
    border: 1px solid rgba(16, 185, 129, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 16px 32px;
    backdrop-filter: blur(4px);
}
.security-banner .sec-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.security-banner .sec-item .sec-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.10);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
}
.security-banner .sec-item strong {
    color: var(--text-primary);
}
.security-banner .sec-divider {
    width: 1px;
    height: 28px;
    background: rgba(37, 99, 235, 0.08);
}


/* ============================================================
   Scenarios (使用场景)
   ============================================================ */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.scenario-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    text-align: center;
}
.scenario-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.scenario-card .emoji {
    font-size: 2.4rem;
    margin-bottom: 12px;
}
.scenario-card h4 {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 4px;
}
.scenario-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}


/* ============================================================
   Process (功能介绍)
   ============================================================ */
.process-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    max-width: 960px;
    margin: 0 auto;
    flex-wrap: wrap;
}
.process-step {
    flex: 1;
    min-width: 120px;
    text-align: center;
    padding: 20px 12px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
}
.process-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.process-step .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 10px;
}
.process-step h4 {
    font-weight: 700;
    font-size: 0.95rem;
}
.process-step p {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 2px;
}
.process-arrow {
    font-size: 1.4rem;
    color: var(--brand);
    padding: 0 4px;
    font-weight: 300;
    opacity: 0.5;
    flex-shrink: 0;
}


/* ============================================================
   News (资讯动态)
   ============================================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.news-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.12);
}
.news-card .card-image {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(245, 250, 255, 0.8), rgba(37, 99, 235, 0.04));
    position: relative;
}
.news-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.news-card:hover .card-image img {
    transform: scale(1.04);
}
.news-card .card-body {
    padding: 20px 22px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.news-card .news-tag {
    display: inline-block;
    align-self: flex-start;
    background: rgba(37, 99, 235, 0.08);
    color: var(--brand);
    padding: 3px 14px;
    border-radius: 30px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 10px;
}
.news-card .news-tag.tag-update {
    background: rgba(37, 99, 235, 0.10);
    color: var(--brand);
}
.news-card .news-tag.tag-event {
    background: rgba(124, 58, 237, 0.10);
    color: #7c3aed;
}
.news-card .news-tag.tag-promo {
    background: rgba(236, 72, 153, 0.10);
    color: #db2777;
}
.news-card .news-tag.tag-insight {
    background: rgba(16, 185, 129, 0.10);
    color: #059669;
}
.news-card .news-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.news-card h3 {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
    line-height: 1.4;
    overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2; /* 显示2行，可改3/4 */
  -webkit-box-orient: vertical;
}
.news-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    flex: 1;
    overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2; /* 显示2行，可改3/4 */
  -webkit-box-orient: vertical;
}
.news-card .news-link {
    margin-top: 16px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--brand);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    align-self: flex-start;
}
.news-card .news-link:hover {
    gap: 12px;
}
.news-card .news-link::after {
    content: '→';
    transition: var(--transition);
}
.news-card .news-link:hover::after {
    transform: translateX(4px);
}


/* ============================================================
   FAQ (通用)
   ============================================================ */
.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover {
    box-shadow: var(--shadow-md);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    user-select: none;
    gap: 16px;
}
.faq-question:hover {
    background: rgba(37, 99, 235, 0.02);
}
.faq-question .faq-q-prefix {
    color: var(--brand);
    margin-right: 4px;
}
.faq-question .faq-icon {
    font-size: 1.2rem;
    transition: var(--transition);
    flex-shrink: 0;
    color: var(--brand);
}
.faq-item.active .faq-question .faq-icon {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease;
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}
.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 24px;
}


/* ============================================================
   CTA Section (全局)
   ============================================================ */
.cta-section {
    background: var(--gradient-primary);
    color: #fff;
    text-align: center;
    padding: 80px 0;
    border-radius: var(--radius);
    margin: 40px auto 0;
    max-width: 960px;
}
.cta-section h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 24px;
}
.cta-section .btn-white {
    background: #fff;
    color: var(--brand);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.cta-section .btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
#home-news-grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 960px;
    margin: 0 auto;
}
#home-news-grid .news-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
}
#home-news-grid  .news-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: block;
}
#home-news-grid  .news-card h4 {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 6px;
    overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2; /* 显示2行，可改3/4 */
  -webkit-box-orient: vertical;
}
#home-news-grid  .news-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2; /* 显示2行，可改3/4 */
  -webkit-box-orient: vertical;
}
/* ============================================================
   Footer (全局)
   ============================================================ */
.footer {
    background: #0b1e3a;
    color: rgba(255, 255, 255, 0.7);
    padding: 48px 0 24px;
    margin-top: 60px;
}
.footer .container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
}
.footer-brand .brand-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: #fff;
    font-weight: 700;
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 32px;
}
.footer-links a {
    font-size: 0.9rem;
    transition: var(--transition);
}
.footer-links a:hover {
    color: #fff;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
}
.footer-bottom .keywords {
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}


/* ============================================================
   Features Page (features-hero + feat-grid + compare-table)
   ============================================================ */
.features-hero {
    padding: 140px 0 60px;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}
.features-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.features-hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}
.features-hero-text {
    max-width: 780px;
}
.features-hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 16px;
}
.features-hero-text h1 .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.features-hero-text .desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 24px;
    line-height: 1.7;
}
.features-hero-text .actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.feat-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.feat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}
.feat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.10);
}
.feat-card:hover::before {
    opacity: 1;
}
.feat-card .icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(37, 99, 235, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--brand);
}
.feat-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.feat-card h3 .prefix {
    color: var(--brand);
}
.feat-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

.compare-table {
    max-width: 860px;
    margin: 0 auto;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid rgba(37, 99, 235, 0.04);
}
.compare-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}
.compare-table th {
    background: var(--gradient-primary);
    color: #fff;
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
}
.compare-table td {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(37, 99, 235, 0.06);
    color: var(--text-secondary);
}
.compare-table tr:last-child td {
    border-bottom: none;
}
.compare-table td:first-child {
    font-weight: 600;
    color: var(--text-primary);
}
.compare-table .check {
    color: var(--brand);
    font-weight: 700;
}


/* ============================================================
   News / Blog Listing Page
   ============================================================ */
.news-hero {
    padding: 140px 0 60px;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}
.news-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.news-hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}
.news-hero-text {
    max-width: 780px;
}
.news-hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 16px;
}
.news-hero-text h1 .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.news-hero-text .desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 24px;
    line-height: 1.7;
}
.news-hero-text .actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.search-wrapper {
    max-width: 600px;
    margin: 0 auto 40px;
    position: relative;
}
.search-wrapper input {
    width: 100%;
    padding: 14px 20px 14px 50px;
    border-radius: 60px;
    border: 1px solid rgba(37, 99, 235, 0.12);
    background: var(--bg-white);
    font-size: 1rem;
    font-family: var(--font);
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    outline: none;
}
.search-wrapper input::placeholder {
    color: var(--text-muted);
}
.search-wrapper input:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08), var(--shadow-md);
}
.search-wrapper .search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    color: var(--text-muted);
    pointer-events: none;
}
.search-wrapper .search-clear {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    display: none;
    padding: 4px;
}
.search-wrapper .search-clear.show {
    display: block;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
}
.pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-xs);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid rgba(37, 99, 235, 0.08);
    transition: var(--transition);
}
.pagination a:hover {
    background: rgba(37, 99, 235, 0.06);
    border-color: rgba(37, 99, 235, 0.15);
}
.pagination a.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}
.pagination a.arrow {
    border: none;
    font-size: 1.1rem;
}
.pagination a.arrow:hover {
    background: transparent;
}


/* ============================================================
   FAQ Page
   ============================================================ */
.faq-hero {
    padding: 140px 0 60px;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}
.faq-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.faq-hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}
.faq-hero-text {
    max-width: 780px;
}
.faq-hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 16px;
}
.faq-hero-text h1 .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.faq-hero-text .desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 24px;
    line-height: 1.7;
}
.faq-hero-text .actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.faq-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}
.faq-tab {
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--bg-white);
    color: var(--text-secondary);
    border: 1px solid rgba(37, 99, 235, 0.10);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
}
.faq-tab:hover {
    background: rgba(37, 99, 235, 0.06);
    color: var(--brand);
    border-color: rgba(37, 99, 235, 0.20);
}
.faq-tab.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}
.faq-tab.active:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
}

.faq-section {
    display: none;
}
.faq-section.active {
    display: block;
}

.contact-card {
    max-width: 720px;
    margin: 40px auto 0;
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 40px 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.06);
    text-align: center;
    transition: var(--transition);
}
.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.contact-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.contact-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}
.contact-card .contact-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}


/* ============================================================
   Download Page
   ============================================================ */
.download-hero {
    padding: 140px 0 60px;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}
.download-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.download-hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}
.download-hero-text {
    max-width: 780px;
}
.download-hero-text h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-bottom: 16px;
}
.download-hero-text h1 .highlight {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.download-hero-text .desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 24px;
    line-height: 1.7;
}
.download-hero-text .trust-badge {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px 40px;
    margin-top: 16px;
}
.download-hero-text .trust-badge span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}
.download-hero-text .trust-badge span strong {
    color: var(--text-primary);
    font-weight: 700;
}


/* ============================================================
   Article / Blog Post Page
   ============================================================ */
.breadcrumb-wrapper {
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(37, 99, 235, 0.04);
    padding: 12px 0;
    position: relative;
    z-index: 5;
}
.breadcrumb-wrapper .container {
    max-width: 820px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.breadcrumb a {
    color: var(--brand);
    font-weight: 500;
    transition: var(--transition);
    padding: 2px 6px;
    border-radius: 4px;
}
.breadcrumb a:hover {
    background: rgba(37, 99, 235, 0.06);
    color: var(--brand-dark);
}
.breadcrumb .separator {
    color: var(--text-muted);
    opacity: 0.35;
    font-weight: 300;
    font-size: 0.7rem;
    margin: 0 2px;
}
.breadcrumb .current {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 2px 6px;
    background: rgba(37, 99, 235, 0.04);
    border-radius: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}
.breadcrumb .home-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    margin-right: 2px;
}

.article-hero {
    padding: 40px 0 32px;
    background: linear-gradient(180deg, var(--bg-light) 0%, rgba(255, 255, 255, 0.3) 100%);
    position: relative;
}
.article-hero .container {
    max-width: 820px;
}
.article-hero h1 {
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 14px;
}
.article-hero .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.article-hero .article-meta .meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}
.article-hero .article-meta .meta-divider {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
    opacity: 0.3;
}

.article-content {
    padding: 0 0 60px;
    background: var(--bg-white);
    position: relative;
}
.article-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0.10;
}
.article-content .container {
    max-width: 820px;
}

.content-wrapper {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 40px 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    position: relative;
    margin-top: 0;
}
.content-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius) var(--radius) 0 0;
    opacity: 0.25;
}

.content-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}
.content-body p {
    margin-bottom: 20px;
}
.content-body p:last-child {
    margin-bottom: 0;
}
.content-body h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 36px 0 16px;
}
.content-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 12px;
}
.content-body ul,
.content-body ol {
    padding-left: 24px;
    margin-bottom: 20px;
}
.content-body ul li,
.content-body ol li {
    margin-bottom: 8px;
}
.content-body .highlight-box {
    background: rgba(37, 99, 235, 0.04);
    border-left: 4px solid var(--brand);
    padding: 20px 24px;
    border-radius: var(--radius-xs);
    margin: 24px 0;
    transition: var(--transition);
}
.content-body .highlight-box:hover {
    background: rgba(37, 99, 235, 0.06);
}
.content-body .highlight-box strong {
    color: var(--brand);
}
.content-body .cta-inline {
    background: var(--gradient-primary);
    color: #fff;
    padding: 28px 32px;
    border-radius: var(--radius-sm);
    margin: 32px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.content-body .cta-inline::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    pointer-events: none;
}
.content-body .cta-inline p {
    margin-bottom: 12px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}
.content-body .cta-inline .btn-white {
    background: #fff;
    color: var(--brand);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
}
.content-body .cta-inline .btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.article-footer {
    border-top: 1px solid rgba(37, 99, 235, 0.06);
    padding-top: 28px;
    margin-top: 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.article-footer .share-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.share-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(37, 99, 235, 0.08);
    background: var(--bg-white);
    transition: var(--transition);
    font-size: 1.1rem;
    color: var(--text-secondary);
    cursor: pointer;
    position: relative;
}
.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}
.share-btn .tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    background: var(--text-primary);
    color: #fff;
    font-size: 0.7rem;
    padding: 4px 12px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    font-weight: 500;
}
.share-btn .tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--text-primary);
}
.share-btn:hover .tooltip {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}
.share-btn.share-twitter {
    color: #1DA1F2;
}
.share-btn.share-twitter:hover {
    background: #1DA1F2;
    color: #fff;
    border-color: #1DA1F2;
}
.share-btn.share-facebook {
    color: #1877F2;
}
.share-btn.share-facebook:hover {
    background: #1877F2;
    color: #fff;
    border-color: #1877F2;
}
.share-btn.share-linkedin {
    color: #0A66C2;
}
.share-btn.share-linkedin:hover {
    background: #0A66C2;
    color: #fff;
    border-color: #0A66C2;
}
.share-btn.share-weibo {
    color: #E6162D;
}
.share-btn.share-weibo:hover {
    background: #E6162D;
    color: #fff;
    border-color: #E6162D;
}
.share-btn.share-copy {
    color: var(--text-muted);
}
.share-btn.share-copy:hover {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.related-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(37, 99, 235, 0.04);
    transition: var(--transition);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.12);
}
.related-card .card-image {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(245, 250, 255, 0.8), rgba(37, 99, 235, 0.04));
}
.related-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.related-card:hover .card-image img {
    transform: scale(1.04);
}
.related-card .card-body {
    padding: 18px 20px 22px;
}
.related-card .card-body .related-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.08);
    color: var(--brand);
    padding: 2px 12px;
    border-radius: 30px;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 8px;
}
.related-card .card-body .related-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.related-card .card-body h4 {
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.4;
    margin-bottom: 6px;
    verflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    height: 45px;
}
.related-card .card-body p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}
.related-card .card-body .read-more {
    display: inline-block;
    margin-top: 12px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--brand);
    transition: var(--transition);
}
.related-card .card-body .read-more::after {
    content: '→';
    margin-left: 4px;
    transition: var(--transition);
}
.related-card .card-body .read-more:hover::after {
    margin-left: 10px;
}


/* ============================================================
   Responsive (全局断点)
   ============================================================ */

/* 1024px */
@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

/* 820px */
@media (max-width: 820px) {
    /* Nav */
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 4px;
        display: none;
        border-radius: 0 0 var(--radius) var(--radius);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-links li a {
        padding: 12px 16px;
        width: 100%;
        text-align: center;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-download-btn {
        margin-top: 4px;
    }

    /* Hero */
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .hero-text .desc {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-text .platform-tags {
        justify-content: center;
    }
    .hero-text .actions {
        justify-content: center;
    }
    .hero-image img {
        max-width: 400px;
        margin: 0 auto;
    }
    .hero-text h1 {
        font-size: 2.6rem;
    }

    /* Grids */
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
    }
    .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .feat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Process */
    .process-flow {
        gap: 8px;
    }
    .process-step {
        min-width: 80px;
        padding: 16px 10px;
    }
    .process-arrow {
        display: none;
    }

    /* Sections */
    .section {
        padding: 56px 0;
    }
    .section-title {
        font-size: 2rem;
    }
    .cta-section {
        padding: 60px 24px;
        border-radius: var(--radius);
    }
    .compare-table {
        overflow-x: auto;
    }

    /* Article */
    .article-hero h1 {
        font-size: 2.2rem;
    }
    .article-hero .article-meta {
        gap: 14px;
        font-size: 0.85rem;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .content-wrapper {
        padding: 28px 24px;
    }
    .content-body {
        font-size: 1rem;
    }
    .content-body h2 {
        font-size: 1.4rem;
    }
    .content-body .cta-inline {
        padding: 20px;
    }
    .share-btn {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
    .breadcrumb .current {
        max-width: 160px;
    }

    /* FAQ Page */
    .faq-hero-text h1 {
        font-size: 2.6rem;
    }
    .faq-tabs {
        gap: 8px;
    }
    .faq-tab {
        padding: 8px 18px;
        font-size: 0.85rem;
    }
    .contact-card {
        padding: 32px 24px;
    }

    /* Download Page */
    .download-hero-text h1 {
        font-size: 2.6rem;
    }
    .download-hero-text .trust-badge {
        gap: 16px 24px;
    }
    .download-hero-text .trust-badge span {
        font-size: 0.8rem;
    }
    .trust-badges {
        gap: 6px 10px;
    }
    .trust-badges .badge {
        font-size: 0.65rem;
        padding: 2px 8px;
    }

    /* News Page */
    .news-hero-text h1 {
        font-size: 2.6rem;
    }
    .search-wrapper {
        max-width: 100%;
        margin: 0 auto 32px;
    }
}

/* 600px */
@media (max-width: 600px) {
    .container {
        padding: 0 16px;
    }

    /* Hero */
    .hero {
        padding: 120px 0 48px;
    }
    .hero-text h1 {
        font-size: 2rem;
    }
    .hero-text .desc {
        font-size: 1rem;
    }
    .hero-image img {
        max-width: 320px;
    }
    .hero-text .actions {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    .hero-text .actions .btn {
        width: 100%;
        max-width: 260px;
    }

    /* Grids */
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .stat-item .number {
        font-size: 2rem;
    }
    .pricing-grid {
        max-width: 100%;
        padding: 0 4px;
    }
    .pricing-card {
        padding: 28px 20px;
    }
    .download-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .download-card {
        padding: 24px 16px 20px;
    }
    .download-card .platform-icon {
        font-size: 2.6rem;
    }
    .download-card h3 {
        font-size: 1.1rem;
    }
    .download-card .btn-download {
        max-width: 100%;
        font-size: 0.85rem;
        padding: 8px 16px;
    }
    .download-card .version {
        font-size: 0.7rem;
    }
    .download-card .system-req {
        font-size: 0.7rem;
    }
    .scenario-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .scenario-card {
        padding: 20px 16px;
    }
    .feat-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Process */
    .process-flow {
        flex-direction: column;
        gap: 12px;
        max-width: 320px;
    }
    .process-step {
        width: 100%;
        min-width: unset;
    }
    .process-arrow {
        transform: rotate(90deg);
        padding: 0;
    }

    /* News */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .news-card .card-body {
        padding: 16px 18px 20px;
    }
    .news-card h3 {
        font-size: 1rem;
    }
    .news-card p {
        font-size: 0.85rem;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Sections */
    .section {
        padding: 40px 0;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .section-sub {
        font-size: 0.95rem;
        margin-bottom: 32px;
    }

    /* Footer */
    .footer-top {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .footer-links {
        justify-content: center;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    /* FAQ */
    .faq-question {
        padding: 14px 18px;
        font-size: 0.92rem;
    }
    .faq-answer {
        font-size: 0.88rem;
    }
    .btn {
        padding: 10px 22px;
        font-size: 0.88rem;
    }
    .security-banner {
        flex-direction: column;
        gap: 10px;
        padding: 16px 20px;
    }
    .security-banner .sec-divider {
        display: none;
    }
    .security-banner .sec-item {
        font-size: 0.75rem;
    }

    /* Article */
    .article-hero {
        padding: 24px 0 20px;
    }
    .article-hero h1 {
        font-size: 1.7rem;
    }
    .article-hero .article-meta {
        gap: 8px;
        font-size: 0.8rem;
        flex-direction: column;
        align-items: flex-start;
    }
    .article-hero .article-meta .meta-divider {
        display: none;
    }
    .article-content {
        padding: 0 0 40px;
    }
    .content-wrapper {
        padding: 20px 16px;
        border-radius: var(--radius-sm);
    }
    .content-body {
        font-size: 0.95rem;
    }
    .content-body h2 {
        font-size: 1.2rem;
    }
    .content-body .highlight-box {
        padding: 16px 18px;
    }
    .content-body .cta-inline {
        padding: 16px;
    }
    .share-section {
        gap: 8px;
    }
    .share-btn {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
    }
    .breadcrumb-wrapper {
        padding: 8px 0;
    }
    .breadcrumb {
        font-size: 0.72rem;
        gap: 2px;
    }
    .breadcrumb .current {
        max-width: 120px;
        font-size: 0.7rem;
    }
    .breadcrumb a {
        font-size: 0.72rem;
    }

    /* CTA */
    .cta-section {
        padding: 40px 16px;
        margin: 20px 0 0;
        border-radius: var(--radius-sm);
    }
    .cta-section h2 {
        font-size: 1.6rem;
    }

    /* FAQ Page */
    .faq-hero {
        padding: 120px 0 40px;
    }
    .faq-hero-text h1 {
        font-size: 2rem;
    }
    .faq-hero-text .desc {
        font-size: 1rem;
        padding: 0 4px;
    }
    .faq-tabs {
        gap: 6px;
    }
    .faq-tab {
        padding: 6px 14px;
        font-size: 0.8rem;
    }
    .contact-card {
        padding: 24px 16px;
    }
    .contact-card h3 {
        font-size: 1.1rem;
    }

    /* Download Page */
    .download-hero {
        padding: 120px 0 40px;
    }
    .download-hero-text h1 {
        font-size: 2rem;
    }
    .download-hero-text .desc {
        font-size: 1rem;
        padding: 0 4px;
    }
    .download-hero-text .trust-badge {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }
    .trust-badges .badge {
        font-size: 0.6rem;
        padding: 2px 6px;
    }

    /* News Page */
    .news-hero {
        padding: 120px 0 40px;
    }
    .news-hero-text h1 {
        font-size: 2rem;
    }
    .news-hero-text .desc {
        font-size: 1rem;
        padding: 0 4px;
    }
    .search-wrapper input {
        padding: 12px 16px 12px 44px;
        font-size: 0.92rem;
    }
    .search-wrapper .search-icon {
        left: 14px;
        font-size: 1rem;
    }
    .pagination a {
        width: 34px;
        height: 34px;
        font-size: 0.8rem;
    }

    /* Features Page */
    .features-hero {
        padding: 120px 0 40px;
    }
    .features-hero-text h1 {
        font-size: 2rem;
    }
    .features-hero-text .desc {
        font-size: 1rem;
        padding: 0 4px;
    }
}

/* 480px */
@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .download-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .download-card {
        padding: 18px 12px 16px;
    }
    .download-card .platform-icon {
        font-size: 2.2rem;
    }
    .download-card h3 {
        font-size: 1rem;
    }
    .download-card .platform-desc {
        font-size: 0.75rem;
    }
    .download-card .btn-download {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
    .scenario-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .hero-text h1 {
        font-size: 1.7rem;
    }
    .features-hero-text h1 {
        font-size: 1.7rem;
    }
    .news-hero-text h1 {
        font-size: 1.7rem;
    }
    .faq-hero-text h1 {
        font-size: 1.7rem;
    }
    .faq-tab {
        font-size: 0.75rem;
        padding: 5px 12px;
    }
    .download-hero-text h1 {
        font-size: 1.7rem;
    }
}