/* Landscape Sea of Clouds Poetic 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 {
    --cyan-dark: #1A3B47; /* Deep mountain cyan */
    --cyan-main: #4A7C89; /* Mountain cyan */
    --cyan-light: #A8C8CE; /* Misty cyan */
    --cloud-white: #F5F7F8;
    --ink-black: #2C363F;
    --gold-accent: #D4B872;
    
    --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(--cloud-white);
    color: var(--ink-black);
    font-family: var(--font-sans);
    line-height: 1.8;
    overflow-x: hidden;
}

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

/* --- Cloud Nav --- */
.cloud-nav {
    position: fixed;
    top: 30px; left: 50%; transform: translateX(-50%);
    background: rgba(245, 247, 248, 0.85);
    backdrop-filter: blur(15px);
    border-radius: 50px;
    padding: 12px 40px;
    display: flex;
    gap: 40px;
    align-items: center;
    box-shadow: 0 10px 30px rgba(26, 59, 71, 0.08);
    z-index: 1000;
    border: 1px solid rgba(255,255,255,0.5);
}
.nav-brand {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 900;
    color: var(--cyan-dark);
    letter-spacing: 2px;
}
.nav-links {
    display: flex;
    gap: 25px;
}
.nav-links a {
    font-size: 15px;
    color: var(--cyan-dark);
    position: relative;
    padding-bottom: 4px;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--gold-accent);
    opacity: 0;
    transition: all 0.3s;
}
.nav-links a:hover::after, .nav-links a.active::after {
    opacity: 1;
}
.nav-tools {
    display: flex;
    align-items: center;
    gap: 20px;
    border-left: 1px solid rgba(26, 59, 71, 0.1);
    padding-left: 20px;
}
.lang-btn {
    font-size: 14px;
    color: var(--cyan-main);
    cursor: pointer;
}
.btn-cloud {
    background: var(--cyan-dark);
    color: #fff;
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(26, 59, 71, 0.2);
}
.btn-cloud:hover {
    background: var(--cyan-main);
    transform: translateY(-2px);
}
.btn-cloud-outline {
    background: transparent;
    color: var(--cyan-dark);
    border: 1px solid var(--cyan-dark);
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}
.btn-cloud-outline:hover {
    background: rgba(26, 59, 71, 0.05);
}

/* --- Hero Peak --- */
.hero-peak {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(to bottom, #E0EBED, var(--cloud-white));
    position: relative;
    overflow: hidden;
    padding: 0 10%;
}
.hero-peak::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; width: 100%; height: 200px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1440 320" xmlns="http://www.w3.org/2000/svg"><path fill="%23F5F7F8" fill-opacity="1" d="M0,160L48,170.7C96,181,192,203,288,192C384,181,480,139,576,133.3C672,128,768,160,864,181.3C960,203,1056,213,1152,197.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom center/cover no-repeat;
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin-top: 50px;
}
.h-title {
    font-family: var(--font-serif);
    font-size: 64px;
    font-weight: 300;
    color: var(--cyan-dark);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 2px;
}
.h-title strong {
    font-weight: 900;
    display: block;
}
.h-desc {
    font-size: 18px;
    color: var(--cyan-main);
    margin-bottom: 40px;
}
.h-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}
.trust-tags {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: var(--cyan-main);
}
.trust-tags span {
    display: flex;
    align-items: center;
    gap: 5px;
}
.trust-tags span::before {
    content: '☁';
    color: var(--gold-accent);
}
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    height: 80%;
    z-index: 0;
    mask-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><path d="M44.7,-76.4C58.8,-69.2,71.8,-59.1,81.3,-46.3C90.8,-33.5,96.8,-18,97.2,-2.4C97.6,13.2,92.4,28.9,82.8,41.5C73.2,54.1,59.2,63.6,44.5,71.2C29.8,78.8,14.9,84.5,0.1,84.3C-14.7,84.1,-29.4,78.2,-43.3,70.3C-57.2,62.4,-70.3,52.5,-79.4,39.6C-88.5,26.7,-93.6,10.8,-92.5,-4.7C-91.4,-20.2,-84.1,-35.3,-73.4,-47.1C-62.7,-58.9,-48.6,-67.4,-34.5,-74.6C-20.4,-81.8,-6.2,-87.7,7.6,-91.9C21.4,-96.1,30.6,-83.6,44.7,-76.4Z" transform="translate(100 100)" /></svg>');
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><path d="M44.7,-76.4C58.8,-69.2,71.8,-59.1,81.3,-46.3C90.8,-33.5,96.8,-18,97.2,-2.4C97.6,13.2,92.4,28.9,82.8,41.5C73.2,54.1,59.2,63.6,44.5,71.2C29.8,78.8,14.9,84.5,0.1,84.3C-14.7,84.1,-29.4,78.2,-43.3,70.3C-57.2,62.4,-70.3,52.5,-79.4,39.6C-88.5,26.7,-93.6,10.8,-92.5,-4.7C-91.4,-20.2,-84.1,-35.3,-73.4,-47.1C-62.7,-58.9,-48.6,-67.4,-34.5,-74.6C-20.4,-81.8,-6.2,-87.7,7.6,-91.9C21.4,-96.1,30.6,-83.6,44.7,-76.4Z" transform="translate(100 100)" /></svg>');
    -webkit-mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
    background: url('1.webp') center/cover;
    opacity: 0.8;
}

/* --- Section Title --- */
.sec-title {
    text-align: center;
    font-family: var(--font-serif);
    font-size: 36px;
    color: var(--cyan-dark);
    margin-bottom: 60px;
    position: relative;
}
.sec-title::after {
    content: '';
    display: block;
    width: 40px; height: 2px;
    background: var(--gold-accent);
    margin: 15px auto 0;
}

/* --- Metrics Mist --- */
.metrics-mist {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    padding: 80px 10%;
    position: relative;
    z-index: 2;
}
.cloud-bubble {
    width: 200px; height: 200px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 15px 35px rgba(26, 59, 71, 0.05);
    animation: morph 8s ease-in-out infinite;
    border: 1px solid rgba(255,255,255,0.5);
}
.cloud-bubble:nth-child(2) { animation-delay: -2s; width: 180px; height: 180px; }
.cloud-bubble:nth-child(3) { animation-delay: -4s; width: 220px; height: 220px; }
.cloud-bubble:nth-child(4) { animation-delay: -6s; width: 190px; height: 190px; }
@keyframes morph {
    0%, 100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
    34% { border-radius: 70% 30% 50% 50% / 30% 30% 70% 70%; }
    67% { border-radius: 100% 60% 60% 100% / 100% 100% 60% 60%; }
}
.m-val { font-family: var(--font-serif); font-size: 36px; color: var(--cyan-dark); font-weight: 900; }
.m-lbl { font-size: 14px; color: var(--cyan-main); }

/* --- Features Scroll --- */
.features-section {
    padding: 80px 0;
}
.features-scroll-container {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 40px;
    padding: 20px 10% 60px;
    scrollbar-width: none;
}
.features-scroll-container::-webkit-scrollbar { display: none; }
.feature-scroll-card {
    min-width: 350px;
    scroll-snap-align: center;
    background: #fff;
    border-radius: 20px;
    padding: 50px 40px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}
.feature-scroll-card::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px; width: 150px; height: 150px;
    background: var(--cyan-light);
    opacity: 0.1;
    border-radius: 50%;
}
.f-icon { font-size: 40px; margin-bottom: 20px; color: var(--cyan-dark); }
.f-title { font-family: var(--font-serif); font-size: 24px; color: var(--cyan-dark); margin-bottom: 15px; }
.f-desc { color: var(--cyan-main); font-size: 15px; margin-bottom: 20px; }
.f-list { list-style: none; }
.f-list li { padding: 8px 0; font-size: 14px; display: flex; align-items: center; gap: 10px; color: var(--ink-black); }
.f-list li::before { content: ''; width: 6px; height: 6px; background: var(--gold-accent); border-radius: 50%; }

/* --- Nodes River --- */
.nodes-section {
    padding: 80px 0;
    background: linear-gradient(to bottom, var(--cloud-white), #E0EBED, var(--cloud-white));
}
.nodes-river {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    padding: 40px 0;
    max-width: 800px;
    margin: 0 auto;
}
.river-path {
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    width: 80px;
    margin-left: -40px;
    background: rgba(168, 200, 206, 0.15);
    border-radius: 40px;
    z-index: 0;
}
.river-node {
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(5px);
    padding: 20px 40px;
    border-radius: 40px;
    margin: 15px 0;
    box-shadow: 0 10px 20px rgba(26, 59, 71, 0.05);
    display: flex;
    gap: 30px;
    align-items: center;
    border: 1px solid rgba(255,255,255,0.8);
}
.river-node:nth-child(even) { transform: translateX(60px); }
.river-node:nth-child(odd) { transform: translateX(-60px); }
.n-city { font-family: var(--font-serif); font-size: 20px; color: var(--cyan-dark); width: 100px; }
.n-speed { color: var(--gold-accent); font-weight: 600; }
.n-dot { width: 12px; height: 12px; background: var(--cyan-main); border-radius: 50%; box-shadow: 0 0 10px var(--cyan-main); }

/* --- Reviews Lanterns --- */
.reviews-section {
    padding: 80px 10%;
}
.lantern-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}
.lantern-card {
    width: 300px;
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px 10px 30px 30px;
    position: relative;
    box-shadow: 0 15px 30px rgba(0,0,0,0.03);
    text-align: center;
    border-top: 4px solid var(--gold-accent);
}
.lantern-card::before {
    content: '';
    position: absolute;
    top: -15px; left: 50%; transform: translateX(-50%);
    width: 20px; height: 10px;
    border: 2px solid var(--gold-accent);
    border-bottom: none;
    border-radius: 10px 10px 0 0;
}
.r-stars { color: var(--gold-accent); margin-bottom: 20px; letter-spacing: 2px; }
.r-text { font-size: 14px; color: var(--ink-black); margin-bottom: 30px; line-height: 1.8; }
.r-user { font-family: var(--font-serif); color: var(--cyan-dark); font-weight: 700; }
.r-user span { display: block; font-size: 12px; color: var(--cyan-main); font-family: var(--font-sans); font-weight: 400; }

/* --- Pricing Peaks --- */
.pricing-section {
    padding: 80px 10% 120px;
}
.pricing-peaks {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 15px;
}
.peak-card {
    background: #fff;
    width: 300px;
    padding: 80px 30px 40px;
    text-align: center;
    clip-path: polygon(50% 0%, 100% 10%, 100% 100%, 0% 100%, 0% 10%);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    position: relative;
    transition: transform 0.3s;
}
.peak-card:hover { transform: translateY(-10px); }
.peak-card.pro {
    clip-path: polygon(50% 0%, 100% 8%, 100% 100%, 0% 100%, 0% 8%);
    background: var(--cyan-dark);
    color: #fff;
    width: 340px;
    padding-top: 100px;
    z-index: 2;
    margin: 0 -15px;
}
.p-title { font-family: var(--font-serif); font-size: 22px; margin-bottom: 10px; color: inherit; }
.peak-card:not(.pro) .p-title { color: var(--cyan-dark); }
.p-price { font-family: var(--font-serif); font-size: 42px; margin-bottom: 30px; color: var(--gold-accent); }
.p-price span { font-size: 14px; font-family: var(--font-sans); color: inherit; opacity: 0.7; }
.p-feat { list-style: none; margin-bottom: 40px; text-align: left; }
.p-feat li { padding: 10px 0; border-bottom: 1px solid rgba(0,0,0,0.05); font-size: 14px; }
.peak-card.pro .p-feat li { border-bottom-color: rgba(255,255,255,0.1); }
.p-feat li::before { content: '✓'; color: var(--gold-accent); margin-right: 10px; }

/* --- FAQ Fan --- */
.faq-section {
    padding: 80px 10%;
    background: #fff;
}
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid rgba(26, 59, 71, 0.1);
    padding: 30px 0;
}
.fq-title { font-family: var(--font-serif); font-size: 18px; color: var(--cyan-dark); margin-bottom: 15px; display: flex; align-items: center; gap: 15px; }
.fq-title::before { content: ''; width: 8px; height: 8px; background: var(--gold-accent); transform: rotate(45deg); }
.fq-ans { font-size: 15px; color: var(--cyan-main); padding-left: 23px; line-height: 1.8; }

/* --- Footer --- */
.cloud-footer {
    background: var(--cyan-dark);
    color: #fff;
    padding: 80px 10% 40px;
    position: relative;
    overflow: hidden;
}
.cloud-footer::before {
    content: '';
    position: absolute;
    top: -50px; left: 0; width: 100%; height: 100px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1440 320" xmlns="http://www.w3.org/2000/svg"><path fill="%231A3B47" fill-opacity="1" d="M0,160L48,170.7C96,181,192,203,288,192C384,181,480,139,576,133.3C672,128,768,160,864,181.3C960,203,1056,213,1152,197.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') top center/cover no-repeat;
    transform: rotate(180deg);
}
.f-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; position: relative; z-index: 1; margin-bottom: 60px; }
.f-brand { font-family: var(--font-serif); font-size: 28px; color: var(--gold-accent); margin-bottom: 20px; }
.f-desc { color: var(--cyan-light); font-size: 14px; max-width: 300px; }
.f-links-wrap { display: flex; gap: 60px; }
.f-col h4 { font-family: var(--font-serif); font-size: 18px; margin-bottom: 20px; color: #fff; }
.f-col a { display: block; color: var(--cyan-light); margin-bottom: 10px; font-size: 14px; transition: color 0.3s; }
.f-col a:hover { color: var(--gold-accent); }
.f-copy { text-align: center; color: rgba(168, 200, 206, 0.5); font-size: 12px; border-top: 1px solid rgba(168, 200, 206, 0.1); padding-top: 30px; position: relative; z-index: 1; }

/* --- Subpages --- */
.sub-hero {
    padding: 180px 10% 80px;
    text-align: center;
    background: linear-gradient(to bottom, #E0EBED, var(--cloud-white));
}
.sub-title { font-family: var(--font-serif); font-size: 48px; color: var(--cyan-dark); margin-bottom: 20px; }
.sub-desc { font-size: 18px; color: var(--cyan-main); }

.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    padding: 80px 10%;
    max-width: 1200px;
    margin: 0 auto;
}
.dl-card {
    background: #fff;
    border-radius: 20px;
    padding: 50px;
    display: flex;
    align-items: center;
    gap: 30px;
    box-shadow: 0 10px 30px rgba(26, 59, 71, 0.05);
    transition: transform 0.3s;
}
.dl-card:hover { transform: translateY(-5px); }
.dl-icon { font-size: 50px; color: var(--cyan-dark); }
.dl-info h3 { font-family: var(--font-serif); font-size: 24px; color: var(--cyan-dark); margin-bottom: 10px; }
.dl-info p { font-size: 14px; color: var(--cyan-main); margin-bottom: 20px; }

.help-layout {
    display: flex;
    gap: 60px;
    padding: 80px 10%;
    max-width: 1200px;
    margin: 0 auto;
}
.help-nav {
    width: 250px;
    position: sticky;
    top: 120px;
    height: fit-content;
}
.help-nav a {
    display: block;
    padding: 15px 20px;
    color: var(--cyan-main);
    border-radius: 10px;
    margin-bottom: 5px;
    transition: all 0.3s;
}
.help-nav a.active, .help-nav a:hover {
    background: #fff;
    color: var(--cyan-dark);
    box-shadow: 0 5px 15px rgba(26, 59, 71, 0.05);
    font-weight: 600;
}
.help-content {
    flex: 1;
    background: #fff;
    border-radius: 20px;
    padding: 60px;
    box-shadow: 0 10px 30px rgba(26, 59, 71, 0.05);
}
.help-content h2 { font-family: var(--font-serif); font-size: 32px; color: var(--cyan-dark); margin-bottom: 40px; border-bottom: 1px solid rgba(26, 59, 71, 0.1); padding-bottom: 15px; }
.help-content h3 { font-size: 20px; color: var(--cyan-dark); margin: 30px 0 15px; }
.help-content p, .help-content li { font-size: 15px; color: var(--cyan-main); margin-bottom: 15px; line-height: 1.8; }
.help-content ul { padding-left: 20px; }

/* Responsive */
@media (max-width: 1024px) {
    .cloud-nav { width: 90%; justify-content: space-between; padding: 12px 20px; }
    .nav-links { display: none; }
    .hero-visual { display: none; }
    .hero-content { max-width: 100%; text-align: center; margin: 100px auto 0; }
    .h-actions { justify-content: center; }
    .trust-tags { justify-content: center; }
    .pricing-peaks { flex-direction: column; align-items: center; }
    .peak-card, .peak-card.pro { width: 100%; max-width: 350px; clip-path: none; border-radius: 20px; margin: 0; padding: 40px; }
    .f-grid { grid-template-columns: 1fr; }
    .help-layout { flex-direction: column; }
    .help-nav { width: 100%; position: static; display: flex; flex-wrap: wrap; gap: 10px; }
    .help-nav a { margin: 0; }
}
@media (max-width: 768px) {
    .h-title { font-size: 42px; }
    .h-actions { flex-direction: column; }
    .river-node, .river-node:nth-child(even), .river-node:nth-child(odd) { transform: none; flex-direction: column; text-align: center; gap: 10px; }
    .river-path { display: none; }
    .dl-grid { grid-template-columns: 1fr; }
    .dl-card { flex-direction: column; text-align: center; }
}