/* Neo-Chinese Minimalist (Zen Blank Space) Style */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;700;900&family=Noto+Sans+SC:wght@300;400;600&display=swap');

:root {
    --z-bg: #FAF9F5; /* Warm off-white */
    --z-text: #1C1C1C; /* Soft black */
    --z-text-light: #666666;
    --z-red: #9E2A2B; /* Cinnabar red */
    --z-border: #E5E3DB;
    --z-gold: #B89E7A;
    
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Noto Sans SC', sans-serif;
}

body {
    background-color: var(--z-bg);
    color: var(--z-text);
    font-family: var(--font-sans);
    line-height: 1.8;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* Header */
.zen-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    padding: 30px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: linear-gradient(to bottom, var(--z-bg) 60%, transparent);
}

.zen-logo {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 2px;
}
.zen-logo .seal {
    background: var(--z-red);
    color: #fff;
    width: 36px; height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    border-radius: 4px;
}

.zen-nav {
    display: flex;
    gap: 40px;
}
.zen-nav a {
    text-decoration: none;
    color: var(--z-text);
    font-size: 15px;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 5px;
}
.zen-nav a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 0; height: 1px;
    background: var(--z-red);
    transition: width 0.3s;
}
.zen-nav a:hover::after, .zen-nav a.active::after {
    width: 100%;
}

.zen-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}
.lang-btn {
    font-family: var(--font-serif);
    color: var(--z-text-light);
    cursor: pointer;
}
.btn-zen {
    text-decoration: none;
    border: 1px solid var(--z-text);
    padding: 10px 24px;
    color: var(--z-text);
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.3s;
    background: transparent;
}
.btn-zen:hover {
    background: var(--z-text);
    color: var(--z-bg);
}
.btn-zen.primary {
    background: var(--z-red);
    color: #fff;
    border-color: var(--z-red);
}
.btn-zen.primary:hover {
    background: transparent;
    color: var(--z-red);
}

/* Hero */
.zen-hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 10%;
}
.hero-content {
    max-width: 600px;
    margin-top: 100px;
}
.hero-title {
    font-family: var(--font-serif);
    font-size: 72px;
    line-height: 1.1;
    font-weight: 300;
    margin-bottom: 30px;
    letter-spacing: 4px;
}
.hero-title strong {
    font-weight: 900;
    color: var(--z-red);
}
.hero-desc {
    font-size: 18px;
    color: var(--z-text-light);
    margin-bottom: 50px;
    max-width: 80%;
}
.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}
.trust-marks {
    display: flex;
    gap: 30px;
    font-size: 13px;
    color: var(--z-gold);
    font-family: var(--font-serif);
}

/* Vertical Metrics in Hero */
.hero-metrics {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 60px;
}
.metric-col {
    writing-mode: vertical-rl;
    display: flex;
    align-items: center;
    gap: 20px;
}
.m-num {
    font-family: var(--font-serif);
    font-size: 32px;
    color: var(--z-red);
}
.m-txt {
    font-size: 14px;
    color: var(--z-text-light);
    letter-spacing: 2px;
}
.m-line {
    width: 1px; height: 60px;
    background: var(--z-border);
}

/* Section Title */
.zen-section {
    padding: 150px 10%;
}
.section-header {
    text-align: center;
    margin-bottom: 100px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 300;
    letter-spacing: 4px;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px; left: 50%; transform: translateX(-50%);
    width: 2px; height: 30px;
    background: var(--z-red);
}

/* Features - Asymmetric Z-Pattern */
.feature-block {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 150px;
    gap: 10%;
}
.feature-block:nth-child(even) {
    flex-direction: row-reverse;
}
.f-text {
    flex: 1;
    max-width: 400px;
}
.f-num {
    font-family: var(--font-serif);
    font-size: 60px;
    color: var(--z-border);
    line-height: 1;
    margin-bottom: 20px;
}
.f-title {
    font-family: var(--font-serif);
    font-size: 28px;
    margin-bottom: 20px;
}
.f-desc {
    color: var(--z-text-light);
    margin-bottom: 30px;
}
.f-list {
    list-style: none;
    padding: 0;
}
.f-list li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 10px;
    font-size: 14px;
}
.f-list li::before {
    content: '';
    position: absolute;
    left: 0; top: 10px;
    width: 4px; height: 4px;
    background: var(--z-red);
    border-radius: 50%;
}
.f-image {
    flex: 1;
    position: relative;
}
.f-image img {
    width: 100%;
    max-width: 500px;
    filter: grayscale(50%);
    transition: filter 0.5s;
}
.f-image img:hover {
    filter: grayscale(0%);
}
.f-image::after {
    content: '';
    position: absolute;
    bottom: -20px; right: -20px;
    width: 100px; height: 100px;
    border-right: 1px solid var(--z-red);
    border-bottom: 1px solid var(--z-red);
    z-index: -1;
}
.feature-block:nth-child(even) .f-image::after {
    right: auto; left: -20px;
    border-right: none; border-left: 1px solid var(--z-red);
}

/* Nodes - Ledger Table */
.ledger-table {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-top: 2px solid var(--z-text);
    border-bottom: 2px solid var(--z-text);
}
.ledger-row {
    display: flex;
    justify-content: space-between;
    padding: 25px 0;
    border-bottom: 1px solid var(--z-border);
}
.ledger-row:last-child {
    border-bottom: none;
}
.l-city {
    font-family: var(--font-serif);
    font-size: 20px;
    width: 30%;
}
.l-speed {
    color: var(--z-red);
    font-family: var(--font-sans);
    width: 30%;
    text-align: center;
}
.l-status {
    color: var(--z-text-light);
    width: 30%;
    text-align: right;
}

/* Reviews - Sparse Masonry-like */
.reviews-container {
    display: flex;
    gap: 40px;
    justify-content: center;
}
.review-card {
    flex: 1;
    max-width: 350px;
    padding: 40px;
    background: #fff;
    border: 1px solid var(--z-border);
    position: relative;
}
.review-card::before {
    content: '「';
    font-family: var(--font-serif);
    font-size: 60px;
    color: var(--z-border);
    position: absolute;
    top: 10px; left: 20px;
}
.r-text {
    font-size: 15px;
    color: var(--z-text);
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
    line-height: 2;
}
.r-author {
    display: flex;
    align-items: center;
    gap: 15px;
}
.r-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--z-bg);
    border: 1px solid var(--z-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    color: var(--z-red);
}
.r-stars {
    color: var(--z-gold);
    font-size: 14px;
    margin-top: 5px;
}

/* Pricing - Minimal Columns */
.pricing-wrap {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}
.price-col {
    flex: 1;
    padding: 60px 40px;
    background: #fff;
    border: 1px solid var(--z-border);
    text-align: center;
    transition: transform 0.3s;
}
.price-col.recommended {
    border-color: var(--z-red);
    border-top: 4px solid var(--z-red);
    padding: 80px 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    z-index: 2;
}
.price-col:not(.recommended) {
    background: var(--z-bg);
}
.p-name {
    font-family: var(--font-serif);
    font-size: 20px;
    margin-bottom: 10px;
}
.p-price {
    font-family: var(--font-serif);
    font-size: 48px;
    color: var(--z-red);
    margin-bottom: 30px;
}
.p-price span {
    font-size: 16px;
    color: var(--z-text-light);
}
.p-features {
    list-style: none;
    padding: 0;
    margin-bottom: 40px;
    text-align: left;
}
.p-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--z-border);
    font-size: 14px;
    color: var(--z-text-light);
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--z-border);
    padding: 30px 0;
}
.faq-q {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--z-text);
}
.faq-a {
    font-size: 15px;
    color: var(--z-text-light);
    line-height: 1.8;
}

/* Footer */
.zen-footer {
    background: var(--z-text);
    color: #fff;
    padding: 80px 10% 40px;
}
.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}
.f-brand {
    font-family: var(--font-serif);
    font-size: 24px;
    margin-bottom: 20px;
}
.f-links {
    display: flex;
    gap: 60px;
}
.f-links dl {
    margin: 0;
}
.f-links dt {
    color: var(--z-gold);
    font-family: var(--font-serif);
    margin-bottom: 20px;
}
.f-links dd {
    margin: 0 0 10px 0;
}
.f-links a {
    color: #aaa;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}
.f-links a:hover {
    color: #fff;
}
.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 30px;
    text-align: center;
    font-size: 12px;
    color: #666;
    letter-spacing: 1px;
}

/* Subpages */
.sub-hero {
    padding: 180px 10% 80px;
    text-align: center;
    background: #fff;
    border-bottom: 1px solid var(--z-border);
}
.sub-title {
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 20px;
    letter-spacing: 4px;
}
.sub-desc {
    color: var(--z-text-light);
    font-size: 18px;
}

.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}
.dl-card {
    border: 1px solid var(--z-border);
    padding: 50px;
    text-align: center;
    background: #fff;
    transition: box-shadow 0.3s;
}
.dl-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.dl-icon {
    font-size: 48px;
    margin-bottom: 20px;
}
.dl-card h3 {
    font-family: var(--font-serif);
    font-size: 24px;
    margin-bottom: 15px;
}
.dl-card p {
    color: var(--z-text-light);
    margin-bottom: 30px;
    font-size: 14px;
}

.help-layout {
    display: flex;
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto;
}
.help-sidebar {
    width: 250px;
    flex-shrink: 0;
}
.help-nav {
    position: sticky;
    top: 120px;
    border-left: 1px solid var(--z-border);
    padding-left: 20px;
}
.help-nav a {
    display: block;
    padding: 10px 0;
    color: var(--z-text-light);
    text-decoration: none;
    font-size: 15px;
    position: relative;
}
.help-nav a.active {
    color: var(--z-red);
    font-weight: 600;
}
.help-nav a.active::before {
    content: '';
    position: absolute;
    left: -21px; top: 15px;
    width: 3px; height: 15px;
    background: var(--z-red);
}
.help-content {
    flex: 1;
}
.help-section {
    margin-bottom: 80px;
}
.help-section h2 {
    font-family: var(--font-serif);
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--z-text);
}
.help-section h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--z-text);
}
.help-section p, .help-section li {
    color: var(--z-text-light);
    font-size: 15px;
    margin-bottom: 15px;
    line-height: 1.8;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-metrics { display: none; }
    .feature-block, .feature-block:nth-child(even) { flex-direction: column; gap: 40px; }
    .f-image { width: 100%; }
    .pricing-wrap { flex-direction: column; align-items: stretch; }
    .price-col.recommended { padding: 60px 40px; }
    .reviews-container { flex-direction: column; align-items: center; }
    .help-layout { flex-direction: column; }
    .help-sidebar { width: 100%; }
    .help-nav { border-left: none; border-bottom: 1px solid var(--z-border); padding-left: 0; padding-bottom: 20px; display: flex; gap: 20px; flex-wrap: wrap; }
    .help-nav a.active::before { display: none; }
}
@media (max-width: 768px) {
    .zen-nav { display: none; }
    .hero-title { font-size: 48px; }
    .hero-buttons { flex-direction: column; }
    .dl-grid { grid-template-columns: 1fr; }
    .footer-top { flex-direction: column; gap: 40px; }
    .f-links { flex-wrap: wrap; }
}