:root {
    --primary: #5FBBA7;
    --primary-bright: #5BB89E;
    --primary-dark: #3DAF92;
    --accent: #4A8FE8;
    --bg: #FFFFFF;
    --bg-soft: #F4FAF8;
    --card: rgba(255, 255, 255, 0.92);
    --card-border: rgba(95, 187, 167, 0.28);
    --text: #1E2E2A;
    --text-dim: #6B8480;
    --glow: rgba(95, 187, 167, 0.35);
    --shadow: 0 8px 32px rgba(30, 60, 50, 0.08);
    --max: 1040px;
    --legal-max: 760px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: var(--primary-dark); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); text-decoration: none; }

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(95, 187, 167, 0.09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(95, 187, 167, 0.09) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 85% 65% at 50% 0%, black 15%, transparent 72%);
}
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}
.bg-glow-1 {
    width: 480px; height: 480px;
    background: rgba(95, 187, 167, 0.22);
    top: -140px; left: 50%;
    transform: translateX(-50%);
    animation: floatCenter 9s ease-in-out infinite;
}
.bg-glow-2 {
    width: 360px; height: 360px;
    background: rgba(91, 157, 255, 0.12);
    bottom: 8%; right: -100px;
    animation: float 11s ease-in-out infinite reverse;
}
.bg-glow-3 {
    width: 280px; height: 280px;
    background: rgba(95, 187, 167, 0.15);
    bottom: 28%; left: -80px;
    animation: float 13s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(0, -20px) scale(1.04); }
}
@keyframes floatCenter {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-18px); }
}

.site-header, main, .site-footer { position: relative; z-index: 1; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8);
}
.header-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
    font-size: 18px;
    text-decoration: none;
    letter-spacing: 0.5px;
}
.brand:hover { text-decoration: none; color: var(--primary-dark); }
.brand img {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    box-shadow: 0 2px 10px var(--glow);
}
.nav { display: flex; gap: 8px; flex-wrap: wrap; }
.nav a {
    color: var(--text-dim);
    font-size: 13px;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.2s;
}
.nav a:hover {
    color: var(--primary-dark);
    border-color: var(--card-border);
    background: var(--bg-soft);
    text-decoration: none;
}

.site-footer {
    margin-top: 64px;
    padding: 40px 24px;
    border-top: 1px solid var(--card-border);
    text-align: center;
    font-size: 13px;
    color: var(--text-dim);
    background: linear-gradient(180deg, transparent, var(--bg-soft));
}
.footer-inner { max-width: var(--max); margin: 0 auto; }
.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--primary-dark); }

.hero {
    max-width: var(--max);
    margin: 0 auto;
    padding: 72px 24px 56px;
    text-align: center;
}
.hero-visual {
    position: relative;
    display: inline-block;
    margin-bottom: 28px;
}
.hero-ring {
    position: absolute;
    inset: -12px;
    border-radius: 22px;
    border: 1px solid var(--card-border);
    background: conic-gradient(from 180deg, transparent, rgba(95, 187, 167, 0.5), transparent, rgba(91, 157, 255, 0.35), transparent);
    animation: spin 12s linear infinite;
    opacity: 0.85;
}
.hero-ring::after {
    content: "";
    position: absolute;
    inset: 2px;
    border-radius: 20px;
    background: var(--bg);
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-logo {
    position: relative;
    z-index: 1;
    width: 72px;
    height: 72px;
    border-radius: 16px;
    box-shadow: 0 6px 24px var(--glow), var(--shadow);
}
.hero-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--primary-dark);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    background: var(--bg-soft);
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--text) 0%, var(--primary-dark) 45%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero .tagline {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    max-width: 480px;
    margin: 0 auto 12px;
    line-height: 1.6;
}
.hero-sub {
    font-size: 15px;
    color: var(--text-dim);
    max-width: 520px;
    margin: 0 auto 32px;
    line-height: 1.8;
}
.hero-badges {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-dark);
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 6px var(--primary);
}
.badge:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 20px var(--glow);
}
.hero-actions {
    margin-top: 28px;
    text-align: center;
}

.section {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px 64px;
}
.section-head { text-align: center; margin-bottom: 36px; }
.section-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--accent);
    margin-bottom: 10px;
}
.section-title { font-size: 26px; font-weight: 700; color: var(--text); }
.section-title::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    margin: 14px auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    box-shadow: 0 0 8px var(--glow);
}
.section-desc {
    max-width: 560px;
    margin: 16px auto 0;
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.75;
}
.about-notice-inline {
    max-width: 720px;
    margin: 0 auto;
    text-align: left;
}
.about-notice > strong:first-child {
    display: block;
    font-size: 15px;
    color: var(--primary-dark);
    margin-bottom: 10px;
}
.about-notice p {
    font-size: 14px;
    line-height: 1.9;
    color: var(--text);
    margin: 0;
}
.about-notice p + p {
    margin-top: 10px;
}
.about-notice p strong {
    display: inline;
    font-weight: 600;
    color: var(--primary-dark);
}
.footer-slogan {
    font-size: 14px;
    color: var(--text);
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.step-card {
    position: relative;
    background: var(--card);
    border-radius: 16px;
    padding: 28px 24px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    text-align: left;
    transition: transform 0.25s, border-color 0.25s;
}
.step-card:hover {
    transform: translateY(-3px);
    border-color: rgba(95, 187, 167, 0.45);
}
.step-num {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary-dark);
    background: var(--bg-soft);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 4px 10px;
    margin-bottom: 14px;
}
.step-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}
.step-card p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.75;
    margin: 0;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}
.feature-card {
    position: relative;
    background: var(--card);
    border-radius: 16px;
    padding: 26px 24px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.feature-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.7;
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(95, 187, 167, 0.5);
    box-shadow: 0 16px 40px rgba(30, 60, 50, 0.1), 0 0 24px rgba(95, 187, 167, 0.15);
}
.feature-icon { font-size: 22px; margin-bottom: 12px; }
.feature-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--primary-dark);
    font-weight: 600;
}
.feature-card p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.75;
}

.formats-panel {
    position: relative;
    text-align: center;
    background: var(--card);
    border-radius: 20px;
    padding: 36px 28px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.formats-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(95, 187, 167, 0.1), transparent 60%);
    pointer-events: none;
}
.formats-groups {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
}
.format-group { text-align: center; }
.format-group-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dim);
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.formats-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    position: relative;
}
.format-tag {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    font-family: "SF Mono", "Menlo", monospace;
    color: var(--primary-dark);
    background: var(--bg-soft);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    letter-spacing: 0.5px;
    transition: all 0.2s;
}
.format-tag:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--glow);
    background: #fff;
}
.formats-note {
    margin-top: 18px;
    font-size: 13px;
    color: var(--text-dim);
    position: relative;
}

.download { text-align: center; padding-bottom: 32px; }
.download-box {
    display: inline-block;
    padding: 40px 48px;
    border-radius: 24px;
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
}
.download p {
    font-size: 14px;
    color: var(--text-dim);
    margin-top: 16px;
    max-width: 400px;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    border: none;
    box-shadow: 0 6px 24px var(--glow);
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 10px 32px var(--glow);
    color: #fff;
}
.btn-primary::after { content: "→"; font-size: 18px; }

.legal-page {
    max-width: var(--legal-max);
    margin: 0 auto;
    padding: 48px 24px 64px;
}
.legal-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 36px 32px;
    box-shadow: var(--shadow);
}
.legal-page h1 {
    font-size: 28px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.legal-meta {
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--card-border);
}
.legal-page h2 {
    font-size: 16px;
    margin: 26px 0 10px;
    color: var(--primary-dark);
    padding-left: 12px;
    border-left: 3px solid var(--primary);
}
.legal-page p, .legal-page li {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.85;
    margin-bottom: 10px;
}
.legal-page strong { color: var(--text); }
.legal-page ul, .legal-page ol {
    padding-left: 22px;
    margin-bottom: 14px;
}
.legal-long-link {
    word-break: break-all;
    overflow-wrap: anywhere;
}

.about-page {
    max-width: var(--legal-max);
    margin: 0 auto;
    padding: 48px 24px 64px;
}
.about-hero {
    text-align: center;
    margin-bottom: 32px;
}
.about-logo {
    width: 110px;
    height: 110px;
    margin-bottom: 20px;
}
.about-page > .about-hero h1 {
    font-size: 28px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.about-tagline {
    font-size: 14px;
    color: var(--text-dim);
}
.about-download {
    margin-top: 20px;
}
.about-notice {
    padding: 20px 22px;
    margin-bottom: 24px;
    border-radius: 16px;
    background: rgba(95, 187, 167, 0.12);
    border: 1px solid var(--card-border);
}
.about-block {
    text-align: left;
    padding: 24px 22px;
    margin-bottom: 16px;
    border-radius: 16px;
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
}
.about-block h2 {
    font-size: 16px;
    margin: 0 0 14px;
    color: var(--primary-dark);
    padding-left: 12px;
    border-left: 3px solid var(--primary);
}
.about-block p,
.about-block li {
    font-size: 14px;
    line-height: 1.85;
    color: var(--text-dim);
}
.about-block p { margin-bottom: 10px; }
.about-block p:last-child { margin-bottom: 0; }
.about-block ul,
.about-block ol {
    padding-left: 20px;
    margin: 0;
}
.about-block li { margin-bottom: 8px; }
.about-block li:last-child { margin-bottom: 0; }
.about-block strong { color: var(--text); }
.about-block-warn {
    background: rgba(255, 248, 240, 0.95);
    border-color: rgba(230, 180, 100, 0.35);
}
.about-block-warn h2 { color: #B8860B; border-left-color: #E6B464; }
.about-block-note {
    margin-top: 14px !important;
    padding-top: 14px;
    border-top: 1px dashed var(--card-border);
    font-size: 13px !important;
}
.about-block-muted {
    background: var(--bg-soft);
    box-shadow: none;
}
.footer-beian { margin-top: 8px; }
.footer-contact { font-size: 14px; color: var(--text-dim); margin-top: 6px; }

.vip-table-wrap {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 28px 24px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}
.vip-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.vip-table th,
.vip-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}
.vip-table th {
    color: var(--primary-dark);
    font-weight: 600;
    background: var(--bg-soft);
}
.vip-table td { color: var(--text-dim); }
.vip-table td:last-child { color: var(--primary-dark); font-weight: 600; }
.vip-table .vip-dash { color: #777; font-weight: 400; }
.vip-table .vip-check {
    color: #7B6FD4;
    font-weight: 700;
    font-size: 18px;
}
.vip-table tbody tr:last-child td { border-bottom: none; }
.vip-table-note {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.75;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    padding: 20px 22px;
    border-radius: 16px;
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
}
.faq-item h3 {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 8px;
}
.faq-item p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.75;
}

.legal-note {
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.75;
}
.legal-block-plain p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.85;
    margin-bottom: 14px;
}
.legal-block-plain strong {
    color: var(--text);
}

@media (max-width: 768px) {
    .steps { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .hero h1 { font-size: 30px; }
    .hero .tagline { font-size: 17px; }
    .nav { gap: 4px; }
    .nav a { padding: 5px 8px; font-size: 12px; }
    .download-box { padding: 28px 20px; width: 100%; }
    .legal-card { padding: 24px 18px; }
}