:root {
    --rose: #E11D48;
    --rose-light: #FB7185;
    --rose-dark: #BE123C;
    --midnight: #0F172A;
    --midnight-soft: #1E293B;
    --surface: #F8FAFC;
    --border: #E2E8F0;
    --text: #334155;
    --text-light: #94A3B8;
    --radius: 12px;
    --transition: 0.25s ease;
}

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

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    color: var(--text);
    line-height: 1.65;
    background: #fff;
    overflow-x: hidden;
}

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

.zec499navbar {
    background: rgba(15, 23, 42, 0.97) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(225, 29, 72, 0.25);
    padding: 0.65rem 0;
    box-shadow: none;
}

.zec499navbar .navbar-brand img { height: 40px; }

.zec499navbar .navbar-toggler {
    border: 1px solid rgba(225, 29, 72, 0.4);
    padding: 0.35rem 0.55rem;
}

.zec499navbar .navbar-toggler-icon { filter: invert(1); }

.zec499nav-link {
    color: #CBD5E1 !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 0.85rem !important;
    border-radius: 6px;
    transition: var(--transition);
}

.zec499nav-link:hover,
.zec499nav-item.zec499this .zec499nav-link {
    color: #fff !important;
    background: rgba(225, 29, 72, 0.15);
}

.zec499hero-section {
    background: var(--midnight);
    color: #fff;
    padding: 5rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.zec499hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 85% 20%, rgba(225, 29, 72, 0.35), transparent),
        radial-gradient(ellipse 40% 40% at 10% 80%, rgba(225, 29, 72, 0.12), transparent);
    pointer-events: none;
}

.zec499hero-content { position: relative; z-index: 1; }

.zec499hero-title {
    font-size: clamp(1.85rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.zec499hero-title span { color: var(--rose-light); }

.zec499hero-subtitle {
    font-size: 1.05rem;
    color: #94A3B8;
    margin-bottom: 1rem;
    max-width: 540px;
}

.zec499hero-lead {
    font-size: 0.95rem;
    color: #64748B;
    margin-bottom: 2rem;
    max-width: 560px;
    border-left: 3px solid var(--rose);
    padding-left: 1rem;
}

.zec499hero-buttons { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.zec499hero-buttons .btn {
    border-radius: 8px;
    font-weight: 600;
    padding: 0.7rem 1.35rem;
    border: 1px solid transparent;
}

.zec499hero-buttons .btn-light { background: #fff; color: var(--midnight); }

.zec499hero-buttons .btn-primary,
.btn-primary.zec499btn {
    background: var(--rose);
    border-color: var(--rose);
}

.zec499hero-buttons .btn-primary:hover,
.btn-primary.zec499btn:hover {
    background: var(--rose-dark);
    border-color: var(--rose-dark);
}

.zec499hero-image-container {
    position: relative;
    display: flex;
    justify-content: center;
    padding: 1rem;
}

.zec499hero-image {
    max-width: 280px;
    border-radius: var(--radius);
    border: 1px solid rgba(225, 29, 72, 0.3);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
}

.zec499hero-image-shadow { display: none; }

.zec499section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--rose);
    margin-bottom: 0.5rem;
}

.zec499section-heading {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--midnight);
    margin-bottom: 0.75rem;
}

#features { background: var(--surface); }

.zec499feature-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    height: 100%;
    transition: var(--transition);
    box-shadow: none;
}

.zec499feature-card:hover {
    border-color: var(--rose-light);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(225, 29, 72, 0.08);
}

.zec499feature-icon {
    width: 56px;
    height: 56px;
    font-size: 1.4rem;
    color: var(--rose);
    background: rgba(225, 29, 72, 0.08);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.zec499feature-card h3 { font-size: 1.1rem; color: var(--midnight); margin-bottom: 0.5rem; }

.zec499stats-section {
    background: linear-gradient(135deg, var(--midnight) 0%, var(--midnight-soft) 100%);
    padding: 3.5rem 0;
    border-top: 1px solid rgba(225, 29, 72, 0.2);
    border-bottom: 1px solid rgba(225, 29, 72, 0.2);
}

.zec499stat-number {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--rose-light);
}

.zec499stat-label { color: #94A3B8; font-size: 0.95rem; }

.zec499stat-item { text-align: center; padding: 1rem; }

.zec499download-section { padding: 4.5rem 0; background: #fff; }

.zec499download-header h2 { color: var(--midnight); font-weight: 700; }

.zec499download-subtitle { color: var(--text-light); }

.zec499download-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: none;
    overflow: hidden;
    transition: var(--transition);
}

.zec499download-card:hover {
    border-color: var(--rose);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.zec499platform-icon {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    font-size: 1.25rem;
    background: var(--midnight);
    color: var(--rose-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.zec499ios-icon, .zec499android-icon { background: var(--midnight); color: var(--rose-light); }

.zec499download-info {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.zec499info-item i { color: var(--rose); }

.zec499security-section { padding: 4.5rem 0; background: var(--surface); }

.zec499security-header h2 { color: var(--midnight); font-weight: 700; }

.zec499security-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    height: 100%;
    transition: var(--transition);
}

.zec499security-card:hover { border-color: var(--rose-light); }

.zec499security-icon {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    background: var(--rose);
    color: #fff;
    font-size: 1.2rem;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zec499security-card h3 { color: var(--midnight); text-align: center; font-size: 1.05rem; }

.zec499security-features {
    background: var(--surface);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border);
}

.zec499feature-item i { color: var(--rose); }

.zec499certificate-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    height: 100%;
}

.zec499certificate-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--midnight);
    color: var(--rose-light);
    font-size: 1.3rem;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zec499certificate-card h4 { color: var(--midnight); font-size: 1rem; }

#faq { background: #fff; }

#faq .card { border: 1px solid var(--border); border-radius: var(--radius); box-shadow: none; }

#faq .card-title { color: var(--midnight); font-size: 1rem; }

#article { background: var(--surface); }

#article .card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: none;
}

.btn-outline-primary.zec499btn { color: var(--rose); border-color: var(--rose); }

.btn-outline-primary.zec499btn:hover { background: var(--rose); border-color: var(--rose); color: #fff; }

.zec499footer {
    background: var(--midnight);
    color: #94A3B8;
    padding: 3rem 0 1.5rem;
}

.zec499footer-title { color: #fff; font-size: 1rem; font-weight: 600; }

.zec499footer-link { color: #94A3B8; text-decoration: none; }

.zec499footer-link:hover { color: var(--rose-light); }

.zec499footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.25rem;
    color: #64748B;
}

.zec499friend-links { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; list-style: none; padding: 0; }

.zec499friend-links a { color: #94A3B8; text-decoration: none; font-size: 0.88rem; }

.zec499friend-links a:hover { color: var(--rose-light); }

.zec499inner-page { background: var(--surface); padding: 2rem 0 3rem; min-height: 60vh; }

.zec499inner-page .card { border: 1px solid var(--border); border-radius: var(--radius); box-shadow: none; }

.zec499article-content { line-height: 1.85; word-break: break-word; }

.zec499article-content img { max-width: 100%; height: auto; border-radius: 8px; }

.zec499meta-tags .zec499tagitem a {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--rose);
    text-decoration: none;
}

.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.pagebar .pagelist a,
.pagebar .pagelist span {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.88rem;
}

.pagebar .pagelist a:hover { border-color: var(--rose); color: var(--rose); }

.navbar-collapse {
    background: var(--midnight-soft);
    border: 1px solid rgba(225, 29, 72, 0.2);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-top: 0.5rem;
}

@media (max-width: 991px) {
    .zec499hero-section { padding: 4rem 0 3rem; text-align: center; }
    .zec499hero-lead { margin-left: auto; margin-right: auto; text-align: left; }
    .zec499hero-buttons { justify-content: center; }
    .zec499hero-image-container { margin-top: 2rem; }
}

@media (max-width: 767px) {
    .zec499navbar { padding: 0.4rem 0; }
    .zec499navbar .navbar-collapse { max-height: 70vh; overflow-y: auto; }
    .zec499hero-buttons { flex-direction: column; }
    .zec499hero-buttons .btn { width: 100%; }
    .zec499download-section .d-flex.align-items-center { flex-direction: column; text-align: center; }
    .zec499download-section .d-flex.align-items-center .ms-3 { margin-left: 0 !important; }
    .zec499download-action .btn { width: 100%; white-space: normal; }
    .zec499inner-page .row { min-width: 0; margin-left: 0; margin-right: 0; }
    .zec499inner-page .col-lg-8,
    .zec499inner-page .col-lg-4 { max-width: 100%; padding-left: 12px; padding-right: 12px; }
    .zec499inner-page .card { overflow: hidden; }
    #article .zec499thumb-home { height: 96px !important; }
    .zec499thumb-list, .zec499thumb-related { height: 72px !important; }
    .zec499thumb-side { height: 50px !important; }
    .zec499thumb-cover { max-width: 100% !important; width: 100%; height: 170px !important; }
    .zec499footer { text-align: center; }
}

@media (max-width: 575px) {
    #article .zec499thumb-home { height: 88px !important; }
    .zec499thumb-list, .zec499thumb-related { height: 64px !important; }
    .zec499thumb-cover { height: 150px !important; }
}