/* Bamboo Shadow Grey Zen Style */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;600;900&family=Noto+Sans+SC:wght@300;400;600&display=swap');

:root {
    --zen-bg: #E8EAE6; /* Ash white / pale grey */
    --zen-bamboo: #6B7B6E; /* Muted bamboo green */
    --zen-bamboo-dark: #4A574C;
    --zen-slate: #5C605D; /* Slate grey */
    --zen-ink: #2A2D2B; /* Dark ink */
    --zen-wood: #8C7A6B; /* Muted wood */
    
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Noto Sans SC', sans-serif;
}

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

body {
    background-color: var(--zen-bg);
    color: var(--zen-ink);
    font-family: var(--font-sans);
    line-height: 1.8;
    overflow-x: hidden;
    /* Subtle bamboo leaf shadow texture */
    background-image: radial-gradient(circle at 100% 0%, rgba(107, 123, 110, 0.05) 0%, transparent 50%),
                      radial-gradient(circle at 0% 100%, rgba(92, 96, 93, 0.05) 0%, transparent 50%);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

/* --- Layout Skeleton --- */
.zen-layout {
    display: flex;
    min-height: 100vh;
    flex-direction: row-reverse; /* Right sidebar */
}

/* --- Right Sidebar (Folding Screen Style) --- */
.zen-sidebar {
    width: 100px;
    background: var(--zen-bg);
    border-left: 2px solid var(--zen-bamboo);
    position: fixed;
    top: 0; right: 0; height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 0;
    z-index: 100;
    box-shadow: -10px 0 30px rgba(0,0,0,0.02);
}
/* Screen folds effect */
.zen-sidebar::before {
    content: '';
    position: absolute;
    top: 0; left: 10px; bottom: 0; width: 1px;
    background: rgba(107, 123, 110, 0.3);
}
.zen-sidebar::after {
    content: '';
    position: absolute;
    top: 0; right: 10px; bottom: 0; width: 1px;
    background: rgba(107, 123, 110, 0.3);
}
.z-brand {
    writing-mode: vertical-rl;
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 900;
    color: var(--zen-bamboo-dark);
    letter-spacing: 5px;
    margin-bottom: auto;
    position: relative;
    z-index: 2;
}
.z-nav {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: auto;
    z-index: 2;
}
.z-nav a {
    writing-mode: vertical-rl;
    font-size: 15px;
    color: var(--zen-slate);
    letter-spacing: 2px;
    transition: color 0.3s;
    position: relative;
}
.z-nav a:hover, .z-nav a.active {
    color: var(--zen-bamboo-dark);
    font-weight: 600;
}
.z-nav a.active::before {
    content: '·';
    position: absolute;
    top: -15px; left: 50%; transform: translateX(-50%);
    color: var(--zen-bamboo);
    font-weight: bold;
}
.z-tools {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    z-index: 2;
}
.z-lang {
    writing-mode: vertical-rl;
    font-size: 13px;
    color: var(--zen-wood);
    cursor: pointer;
}
.btn-zen-side {
    writing-mode: vertical-rl;
    background: var(--zen-bamboo);
    color: #fff;
    padding: 20px 10px;
    font-size: 14px;
    letter-spacing: 2px;
    border-radius: 2px;
    transition: background 0.3s;
}
.btn-zen-side:hover {
    background: var(--zen-bamboo-dark);
}

/* --- Main Content Area --- */
.zen-main {
    width: calc(100% - 100px);
    margin-right: 100px;
}
.zen-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 60px;
}

/* --- Hero: Moon Window (月洞门) --- */
.zen-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    border-bottom: 1px solid rgba(107, 123, 110, 0.2);
}
.hero-split {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}
.hero-text {
    width: 50%;
    padding-right: 40px;
}
.h-title {
    font-family: var(--font-serif);
    font-size: 60px;
    font-weight: 300;
    color: var(--zen-ink);
    line-height: 1.3;
    margin-bottom: 30px;
}
.h-title span {
    color: var(--zen-bamboo-dark);
    font-weight: 600;
}
.h-desc {
    font-size: 16px;
    color: var(--zen-slate);
    margin-bottom: 40px;
    text-align: justify;
}
.h-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}
.btn-zen {
    padding: 12px 30px;
    font-size: 15px;
    letter-spacing: 1px;
    border-radius: 2px;
    transition: all 0.3s;
}
.btn-zen.primary {
    background: var(--zen-bamboo);
    color: #fff;
    border: 1px solid var(--zen-bamboo);
}
.btn-zen.primary:hover {
    background: var(--zen-bamboo-dark);
    border-color: var(--zen-bamboo-dark);
}
.btn-zen.outline {
    background: transparent;
    color: var(--zen-bamboo-dark);
    border: 1px solid var(--zen-bamboo);
}
.btn-zen.outline:hover {
    background: rgba(107, 123, 110, 0.1);
}
.trust-marks {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--zen-wood);
}
.trust-marks span::before {
    content: '🌿';
    margin-right: 5px;
    opacity: 0.7;
}

.hero-visual {
    width: 45%;
    display: flex;
    justify-content: center;
    position: relative;
}
.moon-window {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    overflow: hidden;
    border: 10px solid var(--zen-bg);
    box-shadow: 0 0 0 2px var(--zen-bamboo), 20px 20px 60px rgba(0,0,0,0.05);
    position: relative;
}
.moon-window img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: sepia(0.2) hue-rotate(-20deg) saturate(0.8);
    transition: transform 10s linear;
}
.moon-window:hover img {
    transform: scale(1.1);
}
/* Bamboo leaves decoration */
.hero-visual::after {
    content: '🎋';
    position: absolute;
    bottom: -20px; right: 20px;
    font-size: 60px;
    opacity: 0.2;
    transform: rotate(-15deg);
}

/* --- Section Title --- */
.sec-title {
    text-align: center;
    font-family: var(--font-serif);
    font-size: 32px;
    color: var(--zen-ink);
    margin-bottom: 80px;
    letter-spacing: 4px;
    position: relative;
}
.sec-title::after {
    content: '';
    display: block;
    width: 2px; height: 30px;
    background: var(--zen-bamboo);
    margin: 20px auto 0;
}

/* --- Metrics: Hanging Bamboo Tags --- */
.zen-metrics {
    padding: 100px 0;
}
.tags-container {
    display: flex;
    justify-content: center;
    gap: 40px;
}
.bamboo-tag {
    width: 120px;
    background: #F4F5F3;
    border: 1px solid var(--zen-bamboo);
    padding: 30px 10px;
    text-align: center;
    position: relative;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.03);
}
/* Hanging string */
.bamboo-tag::before {
    content: '';
    position: absolute;
    top: -30px; left: 50%; transform: translateX(-50%);
    width: 2px; height: 30px;
    background: var(--zen-wood);
}
.bamboo-tag::after {
    content: '';
    position: absolute;
    top: -32px; left: 50%; transform: translateX(-50%);
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--zen-wood);
}
.m-val {
    font-family: var(--font-serif);
    font-size: 28px;
    color: var(--zen-bamboo-dark);
    margin-bottom: 15px;
    writing-mode: vertical-rl;
    margin: 0 auto 15px;
}
.m-lbl {
    font-size: 13px;
    color: var(--zen-slate);
    writing-mode: vertical-rl;
    margin: 0 auto;
    letter-spacing: 2px;
}

/* --- Features: Stepped Stone Layout --- */
.zen-features {
    padding: 100px 0;
    background: rgba(255,255,255,0.5);
    border-top: 1px solid rgba(107, 123, 110, 0.2);
    border-bottom: 1px solid rgba(107, 123, 110, 0.2);
}
.stepped-layout {
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.step-card {
    width: 60%;
    background: var(--zen-bg);
    border: 1px solid rgba(107, 123, 110, 0.3);
    padding: 40px;
    position: relative;
    transition: transform 0.3s;
}
.step-card:hover {
    transform: translateY(-5px);
    background: #fff;
}
.step-card:nth-child(1) { align-self: flex-start; }
.step-card:nth-child(2) { align-self: center; }
.step-card:nth-child(3) { align-self: flex-end; }
.f-icon {
    font-size: 32px;
    color: var(--zen-bamboo);
    margin-bottom: 20px;
}
.f-title {
    font-family: var(--font-serif);
    font-size: 22px;
    color: var(--zen-ink);
    margin-bottom: 15px;
}
.f-desc {
    font-size: 14px;
    color: var(--zen-slate);
    margin-bottom: 20px;
}
.f-list { list-style: none; }
.f-list li {
    font-size: 13px;
    padding: 5px 0;
    color: var(--zen-ink);
    display: flex;
    align-items: center;
    gap: 10px;
}
.f-list li::before {
    content: '';
    width: 4px; height: 4px;
    background: var(--zen-bamboo);
    transform: rotate(45deg);
}

/* --- Nodes: Zen Sand Garden Ripples --- */
.zen-nodes {
    padding: 120px 0;
    overflow: hidden;
}
.sand-garden {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ripple {
    position: absolute;
    border: 1px solid rgba(107, 123, 110, 0.2);
    border-radius: 50%;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
}
.r-1 { width: 200px; height: 200px; }
.r-2 { width: 350px; height: 350px; }
.r-3 { width: 500px; height: 500px; }
.r-4 { width: 650px; height: 650px; }
.center-stone {
    position: relative;
    z-index: 2;
    background: var(--zen-bamboo-dark);
    color: #fff;
    padding: 20px 30px;
    border-radius: 2px;
    font-family: var(--font-serif);
    font-size: 20px;
    letter-spacing: 2px;
}
.node-stone {
    position: absolute;
    background: #fff;
    border: 1px solid var(--zen-bamboo);
    padding: 10px 20px;
    border-radius: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    z-index: 2;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.05);
}
.ns-city { font-family: var(--font-serif); font-size: 15px; color: var(--zen-ink); }
.ns-speed { font-size: 12px; color: var(--zen-slate); }
/* Positioning on ripples */
.ns-1 { top: 15%; left: 30%; }
.ns-2 { top: 25%; right: 20%; }
.ns-3 { bottom: 20%; left: 25%; }
.ns-4 { bottom: 10%; right: 35%; }
.ns-5 { top: 50%; left: 10%; transform: translateY(-50%); }

/* --- Reviews: Folding Fan / Scroll Segments --- */
.zen-reviews {
    padding: 100px 0;
    background: rgba(255,255,255,0.5);
    border-top: 1px solid rgba(107, 123, 110, 0.2);
}
.scroll-segments {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.segment {
    width: 300px;
    background: #F4F5F3;
    padding: 40px 30px;
    position: relative;
    border-top: 4px solid var(--zen-wood);
    border-bottom: 4px solid var(--zen-wood);
    box-shadow: 0 10px 20px rgba(0,0,0,0.03);
}
.segment::before {
    content: '“';
    position: absolute;
    top: 20px; left: 20px;
    font-family: var(--font-serif);
    font-size: 40px;
    color: rgba(107, 123, 110, 0.2);
    line-height: 1;
}
.r-stars { color: var(--zen-bamboo); margin-bottom: 15px; font-size: 12px; letter-spacing: 2px; }
.r-text { font-size: 14px; color: var(--zen-slate); margin-bottom: 30px; text-align: justify; }
.r-user {
    display: flex;
    align-items: center;
    gap: 15px;
    border-top: 1px dashed rgba(107, 123, 110, 0.3);
    padding-top: 15px;
}
.r-avatar {
    width: 36px; height: 36px;
    background: var(--zen-bg);
    border: 1px solid var(--zen-bamboo);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    color: var(--zen-bamboo-dark);
}
.r-name { font-size: 14px; color: var(--zen-ink); font-weight: 600; }

/* --- Pricing: Wooden Window Frames --- */
.zen-pricing {
    padding: 100px 0;
}
.window-frames {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 30px;
}
.w-frame {
    flex: 1;
    background: var(--zen-bg);
    border: 8px solid var(--zen-wood);
    padding: 40px 30px;
    text-align: center;
    position: relative;
    transition: transform 0.3s;
}
.w-frame::before {
    content: '';
    position: absolute;
    top: 10px; left: 10px; right: 10px; bottom: 10px;
    border: 1px solid rgba(140, 122, 107, 0.5);
}
.w-frame.pro {
    background: #fff;
    transform: scale(1.05);
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}
.p-badge {
    position: absolute;
    top: -15px; left: 50%; transform: translateX(-50%);
    background: var(--zen-bamboo-dark);
    color: #fff;
    padding: 5px 20px;
    font-size: 12px;
    letter-spacing: 2px;
    border-radius: 2px;
}
.p-title { font-family: var(--font-serif); font-size: 20px; color: var(--zen-ink); margin-bottom: 10px; }
.p-price { font-family: var(--font-serif); font-size: 42px; color: var(--zen-bamboo-dark); margin-bottom: 30px; line-height: 1; }
.p-price span { font-size: 14px; font-family: var(--font-sans); color: var(--zen-slate); }
.p-feat { list-style: none; margin-bottom: 40px; text-align: left; position: relative; z-index: 1; }
.p-feat li { padding: 10px 0; border-bottom: 1px solid rgba(107, 123, 110, 0.2); font-size: 14px; color: var(--zen-ink); }
.p-feat li::before { content: '✓'; color: var(--zen-bamboo); margin-right: 10px; }

/* --- FAQ --- */
.zen-faq {
    padding: 100px 0;
    background: rgba(255,255,255,0.5);
    border-top: 1px solid rgba(107, 123, 110, 0.2);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    margin-bottom: 20px;
    background: #fff;
    border: 1px solid rgba(107, 123, 110, 0.2);
    padding: 25px 30px;
    border-radius: 2px;
}
.fq-title {
    font-family: var(--font-serif);
    font-size: 16px;
    color: var(--zen-ink);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.fq-title::before {
    content: '问';
    background: var(--zen-bamboo);
    color: #fff;
    width: 24px; height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    border-radius: 2px;
}
.fq-ans {
    font-size: 14px;
    color: var(--zen-slate);
    padding-left: 34px;
    text-align: justify;
}

/* --- Footer --- */
.zen-footer {
    background: var(--zen-ink);
    color: var(--zen-bg);
    padding: 80px 0 40px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}
.f-brand {
    font-family: var(--font-serif);
    font-size: 28px;
    letter-spacing: 4px;
    margin-bottom: 20px;
    color: var(--zen-bamboo);
}
.f-desc { font-size: 14px; color: rgba(232, 234, 230, 0.6); }
.f-links-wrap { display: flex; gap: 60px; }
.f-col h4 { font-family: var(--font-serif); font-size: 16px; margin-bottom: 20px; color: var(--zen-bg); letter-spacing: 2px; }
.f-col a { display: block; font-size: 14px; margin-bottom: 10px; color: rgba(232, 234, 230, 0.6); transition: color 0.3s; }
.f-col a:hover { color: var(--zen-bamboo); }
.f-copy { text-align: center; font-size: 12px; color: rgba(232, 234, 230, 0.4); border-top: 1px solid rgba(232, 234, 230, 0.1); padding-top: 30px; letter-spacing: 1px; }

/* --- Subpages --- */
.sub-header {
    padding: 120px 0 60px;
    text-align: center;
    border-bottom: 1px solid rgba(107, 123, 110, 0.2);
}
.sub-title { font-family: var(--font-serif); font-size: 42px; color: var(--zen-ink); margin-bottom: 20px; letter-spacing: 4px; }
.sub-desc { font-size: 16px; color: var(--zen-slate); }

.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    padding: 80px 0;
}
.dl-card {
    background: #fff;
    border: 1px solid rgba(107, 123, 110, 0.2);
    padding: 40px;
    display: flex;
    align-items: center;
    gap: 30px;
    transition: transform 0.3s;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.03); }
.dl-icon { font-size: 48px; color: var(--zen-bamboo); }
.dl-info h3 { font-family: var(--font-serif); font-size: 22px; margin-bottom: 10px; color: var(--zen-ink); }
.dl-info p { font-size: 14px; margin-bottom: 20px; color: var(--zen-slate); }

.help-layout {
    display: flex;
    gap: 60px;
    padding: 80px 0;
}
.help-nav {
    width: 200px;
    border-right: 1px solid rgba(107, 123, 110, 0.2);
    padding-right: 20px;
}
.help-nav a {
    display: block;
    padding: 12px 0;
    font-size: 15px;
    color: var(--zen-slate);
    border-bottom: 1px dashed rgba(107, 123, 110, 0.2);
    transition: color 0.3s;
}
.help-nav a.active, .help-nav a:hover { color: var(--zen-bamboo-dark); font-weight: 600; }
.help-content {
    flex: 1;
    background: #fff;
    padding: 60px;
    border: 1px solid rgba(107, 123, 110, 0.2);
}
.help-content h2 { font-family: var(--font-serif); font-size: 28px; color: var(--zen-ink); margin-bottom: 30px; border-bottom: 2px solid var(--zen-bamboo); padding-bottom: 10px; display: inline-block; }
.help-content h3 { font-size: 18px; color: var(--zen-ink); margin: 30px 0 15px; }
.help-content p, .help-content li { font-size: 15px; color: var(--zen-slate); margin-bottom: 15px; text-align: justify; line-height: 1.8; }
.help-content ul { padding-left: 20px; }

/* Responsive */
@media (max-width: 1024px) {
    .zen-layout { flex-direction: column; }
    .zen-sidebar { position: static; width: 100%; height: auto; flex-direction: row; justify-content: space-between; padding: 15px 20px; border-left: none; border-bottom: 2px solid var(--zen-bamboo); box-shadow: none; }
    .zen-sidebar::before, .zen-sidebar::after { display: none; }
    .z-brand { writing-mode: horizontal-tb; font-size: 20px; margin: 0; }
    .z-nav { display: none; }
    .z-tools { flex-direction: row; margin: 0; }
    .z-lang { writing-mode: horizontal-tb; }
    .btn-zen-side { writing-mode: horizontal-tb; padding: 8px 15px; }
    .zen-main { width: 100%; margin-right: 0; }
    .zen-container { padding: 0 40px; }
    .hero-split { flex-direction: column; text-align: center; }
    .hero-text { width: 100%; padding-right: 0; margin-bottom: 40px; }
    .h-actions { justify-content: center; }
    .trust-marks { justify-content: center; }
    .hero-visual { width: 100%; }
    .moon-window { width: 300px; height: 300px; margin: 0 auto; }
    .tags-container { flex-wrap: wrap; }
    .stepped-layout { align-items: center; }
    .step-card, .step-card:nth-child(1), .step-card:nth-child(2), .step-card:nth-child(3) { width: 100%; align-self: center; }
    .sand-garden { height: auto; padding: 40px 0; display: flex; flex-direction: column; gap: 20px; }
    .ripple, .node-stone { position: static; transform: none; }
    .ripple { display: none; }
    .scroll-segments { flex-direction: column; align-items: center; }
    .window-frames { flex-direction: column; align-items: center; }
    .w-frame, .w-frame.pro { width: 100%; max-width: 350px; transform: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .help-layout { flex-direction: column; }
    .help-nav { width: 100%; border-right: none; border-bottom: 1px solid rgba(107, 123, 110, 0.2); padding-right: 0; padding-bottom: 20px; display: flex; flex-wrap: wrap; gap: 20px; }
    .help-nav a { border-bottom: none; }
}
@media (max-width: 768px) {
    .zen-container { padding: 0 20px; }
    .h-title { font-size: 42px; }
    .h-actions { flex-direction: column; }
    .dl-grid { grid-template-columns: 1fr; }
    .dl-card { flex-direction: column; text-align: center; }
}