/* National Trend Gilded Starry Sky Style - Floating Archipelago Layout */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700;900&family=Noto+Sans+SC:wght@300;400;700&family=Ma+Shan+Zheng&display=swap');

:root {
    --space-bg: #050814;
    --space-bg-light: #0B112C;
    --gold-main: #D4AF37;
    --gold-light: #FFDF73;
    --gold-dark: #997A00;
    --crimson: #C82829;
    --text-main: #F0F0F0;
    --text-muted: #A0A5B5;
    
    --font-title: 'Ma Shan Zheng', 'Noto Serif SC', serif;
    --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(--space-bg);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    padding-bottom: 100px; /* Space for bottom nav */
}

/* Starry Sky Background */
.starfield {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -2;
    background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
    overflow: hidden;
}
.stars {
    position: absolute;
    width: 2px; height: 2px;
    background: transparent;
    box-shadow: 174px 246px #FFF, 842px 146px #FFF, 432px 546px #FFF, 234px 846px #FFF, 942px 346px #FFF, 532px 946px #FFF, 124px 446px #FFF, 742px 646px #FFF, 332px 246px #FFF, 634px 746px #FFF;
    animation: animStar 50s linear infinite;
}
.stars::after {
    content: " ";
    position: absolute;
    top: 2000px;
    width: 2px; height: 2px;
    background: transparent;
    box-shadow: 174px 246px #FFF, 842px 146px #FFF, 432px 546px #FFF, 234px 846px #FFF, 942px 346px #FFF, 532px 946px #FFF, 124px 446px #FFF, 742px 646px #FFF, 332px 246px #FFF, 634px 746px #FFF;
}
@keyframes animStar {
    from { transform: translateY(0px); }
    to { transform: translateY(-2000px); }
}

/* Gilded Clouds (Decorative) */
.gilded-clouds {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    opacity: 0.1;
    background-image: radial-gradient(circle at 20% 30%, var(--gold-main) 0%, transparent 20%),
                      radial-gradient(circle at 80% 70%, var(--gold-main) 0%, transparent 20%);
    filter: blur(60px);
}

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

/* --- Skeleton: Bottom Floating Dock Navigation --- */
.dock-nav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(11, 17, 44, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 40px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 20px rgba(212, 175, 55, 0.1);
}
.dock-brand {
    font-family: var(--font-title);
    font-size: 24px;
    color: var(--gold-light);
    padding-right: 20px;
    border-right: 1px solid rgba(212, 175, 55, 0.3);
    text-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
}
.dock-links {
    display: flex;
    gap: 15px;
}
.dock-links a {
    font-size: 14px;
    color: var(--text-main);
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
}
.dock-links a:hover, .dock-links a.active {
    background: rgba(212, 175, 55, 0.1);
    color: var(--gold-light);
}
.dock-tools {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-left: 20px;
    border-left: 1px solid rgba(212, 175, 55, 0.3);
}
.lang-btn {
    font-size: 14px;
    color: var(--gold-main);
    cursor: pointer;
}
.btn-gold {
    background: linear-gradient(135deg, var(--gold-dark), var(--gold-light), var(--gold-main));
    color: var(--space-bg);
    padding: 10px 24px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 14px;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
    transition: transform 0.3s, box-shadow 0.3s;
}
.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(212, 175, 55, 0.6);
}

/* --- Skeleton: Central Axis Layout --- */
.axis-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    padding-top: 100px;
}
/* The Gilded Thread */
.axis-container::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    transform: translateX(-50%);
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--gold-main), var(--gold-dark), transparent);
    z-index: -1;
    opacity: 0.3;
}

/* Hero Island */
.hero-island {
    background: rgba(11, 17, 44, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 30px;
    padding: 80px 60px;
    text-align: center;
    margin: 0 auto 100px;
    width: 90%;
    position: relative;
    box-shadow: inset 0 0 50px rgba(212, 175, 55, 0.05), 0 20px 50px rgba(0,0,0,0.5);
}
.hero-island::before {
    content: '';
    position: absolute;
    top: -2px; left: 50%; transform: translateX(-50%);
    width: 100px; height: 4px;
    background: var(--gold-light);
    border-radius: 4px;
    box-shadow: 0 0 15px var(--gold-light);
}
.h-title {
    font-family: var(--font-title);
    font-size: 72px;
    background: linear-gradient(to bottom, #FFF, var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    letter-spacing: 5px;
}
.h-desc {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto; margin-right: auto;
}
.h-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}
.btn-outline-gold {
    background: transparent;
    color: var(--gold-light);
    border: 1px solid var(--gold-main);
    padding: 10px 24px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 14px;
    transition: all 0.3s;
}
.btn-outline-gold:hover {
    background: rgba(212, 175, 55, 0.1);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.2);
}
.trust-tags {
    display: flex;
    justify-content: center;
    gap: 30px;
}
.trust-tags span {
    font-size: 13px;
    color: var(--gold-main);
    display: flex;
    align-items: center;
    gap: 5px;
}
.trust-tags span::before {
    content: '✦';
    color: var(--crimson);
}

/* Metrics - Orbiting Satellites */
.metrics-orbit {
    position: relative;
    height: 200px;
    margin-bottom: 150px;
}
.m-satellite {
    position: absolute;
    width: 160px; height: 160px;
    background: rgba(11, 17, 44, 0.8);
    border: 1px solid var(--gold-main);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.1);
}
.m-satellite::after {
    content: '';
    position: absolute;
    top: 5px; left: 5px; right: 5px; bottom: 5px;
    border: 1px dashed rgba(212, 175, 55, 0.5);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}
@keyframes rotate { 100% { transform: rotate(360deg); } }
.ms-1 { top: 0; left: 10%; }
.ms-2 { top: 40px; left: 35%; }
.ms-3 { top: -20px; right: 35%; }
.ms-4 { top: 20px; right: 10%; }
.m-val {
    font-family: var(--font-serif);
    font-size: 32px;
    color: var(--gold-light);
    font-weight: 900;
    z-index: 1;
}
.m-lbl {
    font-size: 12px;
    color: var(--text-muted);
    z-index: 1;
}

/* Features - Alternating Timeline Islands */
.timeline-features {
    margin-bottom: 150px;
}
.sec-title {
    text-align: center;
    font-family: var(--font-title);
    font-size: 42px;
    color: var(--gold-light);
    margin-bottom: 80px;
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
}
.tl-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 80px;
    position: relative;
}
.tl-item::before {
    content: '◈';
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    color: var(--gold-light);
    font-size: 24px;
    text-shadow: 0 0 10px var(--gold-main);
    background: var(--space-bg);
    padding: 10px 0;
}
.tl-content {
    width: 42%;
    background: linear-gradient(135deg, rgba(11, 17, 44, 0.8), rgba(5, 8, 20, 0.9));
    border: 1px solid rgba(212, 175, 55, 0.3);
    padding: 40px;
    border-radius: 20px;
    position: relative;
}
.tl-item:nth-child(odd) .tl-content { margin-left: auto; }
.tl-item:nth-child(even) .tl-content { margin-right: auto; }
/* Connecting lines */
.tl-item:nth-child(odd) .tl-content::before {
    content: ''; position: absolute; top: 50%; right: -19%; width: 19%; height: 1px; background: var(--gold-main);
}
.tl-item:nth-child(even) .tl-content::before {
    content: ''; position: absolute; top: 50%; left: -19%; width: 19%; height: 1px; background: var(--gold-main);
}

.tl-icon { font-size: 36px; margin-bottom: 20px; }
.tl-content h3 { font-family: var(--font-serif); font-size: 24px; color: var(--gold-light); margin-bottom: 15px; }
.tl-content p { color: var(--text-muted); margin-bottom: 20px; font-size: 14px; }
.tl-list { list-style: none; }
.tl-list li { font-size: 13px; padding: 5px 0; color: var(--text-main); display: flex; align-items: center; gap: 8px; }
.tl-list li::before { content: ''; width: 4px; height: 4px; background: var(--crimson); border-radius: 50%; }

/* Nodes - Constellation Map */
.constellation-map {
    position: relative;
    height: 400px;
    margin-bottom: 150px;
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.05) 0%, transparent 70%);
}
.c-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.c-star {
    width: 16px; height: 16px;
    background: var(--gold-light);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--gold-main), 0 0 40px var(--gold-light);
    position: relative;
}
.c-star::after {
    content: ''; position: absolute; top: -10px; left: -10px; right: -10px; bottom: -10px;
    border: 1px solid rgba(212, 175, 55, 0.5); border-radius: 50%; animation: pulse 2s infinite;
}
@keyframes pulse { 0% { transform: scale(0.8); opacity: 1; } 100% { transform: scale(1.5); opacity: 0; } }
.c-info {
    background: rgba(11, 17, 44, 0.8);
    border: 1px solid var(--gold-main);
    padding: 5px 15px;
    border-radius: 15px;
    text-align: center;
}
.c-city { font-family: var(--font-serif); font-size: 14px; color: var(--gold-light); }
.c-speed { font-size: 12px; color: var(--text-muted); }
/* Positioning */
.cn-1 { top: 20%; left: 20%; }
.cn-2 { top: 60%; left: 35%; }
.cn-3 { top: 30%; left: 50%; transform: translateX(-50%); }
.cn-4 { top: 70%; right: 30%; }
.cn-5 { top: 25%; right: 15%; }
/* Lines between stars (SVG background would be better, using simple borders here for effect) */
.constellation-map::before {
    content: ''; position: absolute; top: 25%; left: 22%; width: 20%; height: 1px;
    background: rgba(212, 175, 55, 0.3); transform: rotate(45deg);
}

/* Reviews - Stacked Cards */
.reviews-stack {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 150px;
    flex-wrap: wrap;
}
.r-card {
    width: 320px;
    background: rgba(11, 17, 44, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 15px;
    padding: 30px;
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}
.r-card:hover {
    transform: translateY(-10px);
    border-color: var(--gold-main);
}
.r-card::before {
    content: '❝';
    position: absolute; top: 10px; left: 20px;
    font-family: var(--font-title); font-size: 40px; color: rgba(212, 175, 55, 0.2);
}
.r-stars { color: var(--gold-main); margin-bottom: 15px; font-size: 14px; }
.r-text { font-size: 14px; color: var(--text-main); margin-bottom: 20px; line-height: 1.8; }
.r-user { display: flex; align-items: center; gap: 15px; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 15px; }
.r-avatar { width: 36px; height: 36px; background: var(--gold-dark); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); color: #fff; }
.r-name { font-size: 14px; color: var(--gold-light); }

/* Pricing - Diagonal Overlap */
.pricing-overlap {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 150px;
}
.p-card {
    width: 300px;
    background: rgba(11, 17, 44, 0.9);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
}
.p-card.left { transform: translateX(30px) scale(0.9); z-index: 1; opacity: 0.8; }
.p-card.right { transform: translateX(-30px) scale(0.9); z-index: 1; opacity: 0.8; }
.p-card.center { z-index: 2; border-color: var(--gold-light); box-shadow: 0 0 40px rgba(212, 175, 55, 0.2); transform: scale(1.05); background: rgba(5, 8, 20, 0.95); }
.p-card:hover { opacity: 1; z-index: 3; }
.p-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--crimson); color: #fff; padding: 4px 15px; border-radius: 10px; font-size: 12px; font-weight: bold; }
.p-title { font-family: var(--font-serif); font-size: 20px; color: var(--gold-main); margin-bottom: 10px; }
.p-price { font-family: var(--font-title); font-size: 48px; color: var(--gold-light); margin-bottom: 20px; }
.p-price span { font-size: 14px; font-family: var(--font-sans); color: var(--text-muted); }
.p-feat { list-style: none; margin-bottom: 30px; text-align: left; }
.p-feat li { font-size: 13px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.05); color: var(--text-main); }
.p-feat li::before { content: '✓'; color: var(--gold-main); margin-right: 10px; }

/* FAQ - Glowing Panels */
.faq-panels {
    max-width: 800px;
    margin: 0 auto 150px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.faq-panel {
    background: rgba(11, 17, 44, 0.5);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 15px;
    padding: 25px 30px;
    transition: background 0.3s;
}
.faq-panel:hover { background: rgba(212, 175, 55, 0.05); }
.fq-title { font-family: var(--font-serif); font-size: 18px; color: var(--gold-light); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.fq-title::before { content: '问'; background: var(--crimson); color: #fff; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; border-radius: 4px; font-size: 12px; }
.fq-ans { font-size: 14px; color: var(--text-muted); padding-left: 34px; line-height: 1.8; }

/* Footer */
.gilded-footer {
    border-top: 1px solid rgba(212, 175, 55, 0.3);
    padding: 60px 20px 40px;
    text-align: center;
    background: rgba(5, 8, 20, 0.9);
}
.f-logo { font-family: var(--font-title); font-size: 32px; color: var(--gold-main); margin-bottom: 20px; }
.f-nav { display: flex; justify-content: center; gap: 30px; margin-bottom: 30px; flex-wrap: wrap; }
.f-nav a { color: var(--text-muted); font-size: 14px; transition: color 0.3s; }
.f-nav a:hover { color: var(--gold-light); }
.f-copy { font-size: 12px; color: rgba(255,255,255,0.3); }

/* Subpages */
.sub-island {
    background: rgba(11, 17, 44, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 30px;
    padding: 60px;
    text-align: center;
    margin: 0 auto 60px;
    width: 90%;
    max-width: 1000px;
}
.sub-title { font-family: var(--font-title); font-size: 48px; color: var(--gold-light); margin-bottom: 20px; }
.sub-desc { color: var(--text-muted); font-size: 16px; }

.dl-archipelago {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-bottom: 100px;
}
.dl-isle {
    width: 280px;
    background: rgba(11, 17, 44, 0.8);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 20px;
    padding: 40px 20px;
    text-align: center;
    transition: transform 0.3s;
}
.dl-isle:hover { transform: translateY(-5px); border-color: var(--gold-light); }
.dl-icon { font-size: 48px; margin-bottom: 20px; }
.dl-isle h3 { font-family: var(--font-serif); font-size: 20px; color: var(--gold-main); margin-bottom: 15px; }
.dl-isle p { font-size: 13px; color: var(--text-muted); margin-bottom: 25px; }

.help-archipelago {
    display: flex;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto 100px;
}
.help-nav-isle {
    width: 250px;
    background: rgba(11, 17, 44, 0.8);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 20px;
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 20px;
}
.help-nav-isle a {
    display: block; padding: 12px 15px; color: var(--text-muted); font-size: 14px; border-radius: 10px; margin-bottom: 5px; transition: all 0.3s;
}
.help-nav-isle a.active, .help-nav-isle a:hover { background: rgba(212, 175, 55, 0.1); color: var(--gold-light); }
.help-content-isle {
    flex: 1;
    background: rgba(11, 17, 44, 0.8);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: 20px;
    padding: 40px;
}
.help-content-isle h2 { font-family: var(--font-serif); font-size: 28px; color: var(--gold-light); border-bottom: 1px solid rgba(212, 175, 55, 0.2); padding-bottom: 15px; margin-bottom: 30px; }
.help-content-isle h3 { font-size: 18px; color: var(--gold-main); margin: 30px 0 15px; }
.help-content-isle p, .help-content-isle li { font-size: 14px; color: var(--text-main); margin-bottom: 15px; line-height: 1.8; }
.help-content-isle ul { padding-left: 20px; }

/* Responsive */
@media (max-width: 1024px) {
    .dock-nav { width: 90%; justify-content: space-between; }
    .dock-links { display: none; }
    .tl-item, .tl-item:nth-child(even) { flex-direction: column; text-align: center; }
    .tl-content, .tl-item:nth-child(odd) .tl-content, .tl-item:nth-child(even) .tl-content { width: 90%; margin: 0 auto; }
    .tl-item::before, .tl-content::before { display: none; }
    .metrics-orbit { height: auto; display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; }
    .m-satellite { position: relative; top: auto; left: auto; right: auto; width: 140px; height: 140px; }
    .pricing-overlap { flex-direction: column; gap: 30px; }
    .p-card.left, .p-card.right { transform: none; width: 90%; max-width: 350px; }
    .p-card.center { transform: none; width: 90%; max-width: 350px; }
    .help-archipelago { flex-direction: column; padding: 0 20px; }
    .help-nav-isle { width: 100%; position: static; display: flex; flex-wrap: wrap; gap: 10px; }
    .help-nav-isle a { margin: 0; }
}
@media (max-width: 768px) {
    .h-title { font-size: 42px; }
    .h-actions { flex-direction: column; }
    .constellation-map { height: auto; display: flex; flex-direction: column; gap: 30px; padding: 40px 0; }
    .c-node { position: relative; top: auto; left: auto; right: auto; transform: none; }
    .constellation-map::before { display: none; }
}