:root {
    --bg-black: #050505;
    --gold: #D4AF37;
    --gold-bright: #f1e5ac;
    --cyan: #00E5FF;
    --text-white: #FFFFFF;
    --text-gray: #A0A0A0;
    --glass: rgba(255, 255, 255, 0.03);
    --pink: #ff99cc;
    --border-glass: rgba(255, 255, 255, 0.1);
    --pure-white: #FFFFFF;
    --pearl: #F5F5F7;
    --rose-gold: #E5B7AD;
    --gold-gradient: linear-gradient(135deg, #D4AF37 0%, #f1e5ac 100%);
}

/* Theme: Pearl White (For Glow/Women) */
.theme-white {
    --bg-black: #F5F5F7;
    --text-white: #1D1D1F;
    --text-gray: #86868B;
    --glass: rgba(0, 0, 0, 0.02);
    --border-glass: rgba(0, 0, 0, 0.08);
    --gold: var(--rose-gold);
    --cyan: #34C759;
}

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

body {
    background-color: var(--bg-black);
    color: var(--text-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.5s ease;
}

h1, h2, h3, .logo {
    font-family: 'Noto Serif SC', serif;
    letter-spacing: 1px;
    font-weight: 700;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.center { text-align: center; }

.responsive-grid {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
    .responsive-grid {
        grid-template-columns: 1fr;
    }
}

/* Glow Background */
.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    transition: background 1s ease;
}

.theme-white .glow-bg {
    background: radial-gradient(circle at 50% 50%, rgba(229, 183, 173, 0.2) 0%, transparent 70%);
}

/* Nav */
nav {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 clamp(20px, 5vw, 60px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.5);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
}

.theme-white nav {
    background: rgba(245, 245, 247, 0.5);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--gold);
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-white);
    margin-left: 40px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s;
    opacity: 0.8;
}

.nav-links a:hover {
    color: var(--gold);
    opacity: 1;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1.2;
    z-index: 10;
}

h1 {
    font-size: clamp(3rem, 10vw, 5.5rem);
    line-height: 1;
    margin-bottom: 30px;
    background: linear-gradient(to bottom, #fff, #999);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.theme-white h1 {
    background: linear-gradient(to bottom, #1d1d1f, #86868b);
    -webkit-background-clip: text;
    background-clip: text;
}

.highlight {
    color: var(--gold);
    -webkit-text-fill-color: initial;
    text-shadow: 0 0 40px rgba(212, 175, 55, 0.4);
}

.subtitle {
    font-size: 1.4rem;
    color: var(--text-gray);
    margin-bottom: 25px;
    letter-spacing: 4px;
    font-weight: 300;
}

.hma-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid var(--gold);
    color: var(--gold);
    font-size: 0.75rem;
    border-radius: 4px;
    margin-bottom: 20px;
    font-weight: 600;
}

.safety-badge {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-white);
    margin-bottom: 40px;
    backdrop-filter: blur(10px);
}

.btn-primary {
    display: inline-block;
    padding: 20px 48px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-bright) 100%);
    color: #000;
    text-decoration: none;
    font-weight: 700;
    border-radius: 100px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.3);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(212, 175, 55, 0.5);
}

.stock-status {
    display: block;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--cyan);
    font-weight: 600;
    text-transform: uppercase;
}

.hero-visual {
    flex: 0.8;
    display: flex;
    justify-content: center;
    position: relative;
}

.pulse-container {
    position: relative;
    width: 450px;
}

.hero-img {
    width: 100%;
    z-index: 2;
    position: relative;
    filter: drop-shadow(0 0 80px rgba(212, 175, 55, 0.25));
    transition: transform 0.1s ease-out;
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid var(--gold);
    animation: pulse 6s infinite;
    opacity: 0;
}

@keyframes pulse {
    0% { width: 10%; height: 10%; opacity: 0.8; }
    50% { opacity: 0.3; }
    100% { width: 180%; height: 180%; opacity: 0; }
}

/* Glass Section */
.glass {
    background: var(--glass);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(40px);
    padding: 80px;
    border-radius: 24px;
    box-shadow: 0 40px 100px rgba(0,0,0,0.2);
}

/* Sections */
section {
    padding: 160px 0;
}

h2 {
    font-size: 4rem;
    margin-bottom: 40px;
    line-height: 1.1;
}

.section-label {
    display: block;
    color: var(--gold);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 5px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

/* Price Anchor Notice */
.price-anchor {
    margin-bottom: 50px;
    padding: 30px;
    background: rgba(212, 175, 55, 0.03);
    border-radius: 20px;
    border: 1px dashed rgba(212, 175, 55, 0.2);
}

.official-label {
    font-size: 0.9rem;
    color: var(--gold);
    letter-spacing: 6px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 15px;
    font-weight: 700;
}

.anchor-content {
    font-size: clamp(1.5rem, 5vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    letter-spacing: -1px;
}

.anchor-content .strike {
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.4);
    font-weight: 400;
    margin-left: 10px;
}

.subsidy-badge {
    background: linear-gradient(135deg, var(--gold) 0%, #f1d592 100%);
    color: #000;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 900;
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.4);
    text-transform: none;
}

@media (max-width: 576px) {
    .anchor-content {
        flex-direction: column;
        gap: 10px;
        font-size: 1.2rem;
    }
}

/* Audience Section */
.audience {
    background: rgba(0, 0, 0, 0.3);
}

.audience-card {
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    cursor: default;
}

.audience-card:hover {
    transform: translateY(-10px);
    border-color: var(--gold);
    background: rgba(212, 175, 55, 0.05);
}

.audience-card h3 {
    font-size: 1.5rem;
}

/* Pricing/Stage Section */
.stages {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 60px;
}

.stage-card {
    padding: 30px;
    border-radius: 16px;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-glass);
    text-align: center;
    transition: all 0.3s ease;
}

.stage-card.active {
    background: linear-gradient(180deg, rgba(212, 175, 55, 0.1) 0%, transparent 100%);
    border-color: var(--gold);
    transform: scale(1.05);
}

.stage-num {
    font-size: 0.8rem;
    color: var(--text-gray);
    margin-bottom: 10px;
}

.stage-price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-white);
}

.active .stage-price {
    color: var(--gold);
}

/* Mastery Section */
.grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.features {
    list-style: none;
    margin-top: 50px;
}

.features li {
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 500;
}

.features li::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--gold);
    margin-right: 20px;
    border-radius: 2px;
}

/* Testimony */
.testimony-card {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.quote-icon {
    font-size: 8rem;
    color: var(--gold);
    position: absolute;
    top: -40px;
    left: 40px;
    opacity: 0.15;
}

.story {
    font-size: clamp(1.2rem, 5vw, 1.8rem);
    line-height: 1.7;
    font-weight: 300;
}

/* Science Section */
.science-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 80px;
}

.science-card {
    text-align: center;
    padding: 30px 15px;
}

.science-card h4 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--gold);
    /* Allow wrapping on small mobile */
}

/* Form Container */
.form-container {
    max-width: 800px;
    margin: 60px auto 0;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    text-align: left;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-gray);
    margin-bottom: 8px;
    margin-left: 10px;
}

input, select {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    color: var(--text-white);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    border-color: var(--gold);
}

/* Modal / Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(20px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal {
    width: 90%;
    max-width: 600px;
    padding: 60px;
    background: var(--bg-black);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 30px;
    right: 30px;
    cursor: pointer;
    font-size: 2rem;
    opacity: 0.5;
}

footer {
    padding: 80px 0;
    text-align: center;
    color: var(--text-gray);
    border-top: 1px solid var(--border-glass);
}

/* Vision Roadmap Section */
.vision {
    padding: 120px 0;
    background: linear-gradient(to bottom, transparent, rgba(212, 175, 55, 0.05));
}

.roadmap {
    position: relative;
    max-width: 900px;
    margin: 80px auto 0;
    padding-left: 40px;
}

.roadmap::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--gold), transparent);
    opacity: 0.3;
}

.roadmap-item {
    position: relative;
    margin-bottom: 60px;
    display: flex;
    gap: 30px;
}

.roadmap-icon {
    width: 30px;
    height: 30px;
    background: var(--bg);
    border: 2px solid var(--gold);
    color: var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.2);
    z-index: 1;
}

.roadmap-content {
    background: rgba(255, 255, 255, 0.02);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-glass);
    transition: all 0.4s ease;
}

.roadmap-content:hover {
    background: rgba(212, 175, 55, 0.05);
    border-color: var(--gold);
    transform: translateX(10px);
}

.roadmap-content h4 {
    color: var(--gold);
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.roadmap-date {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    color: var(--gold-bright);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 15px;
    opacity: 0.8;
}

.roadmap-content p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Mobile */
@media (max-width: 992px) {
    h1 { font-size: clamp(2.8rem, 8vw, 4rem); }
    h2 { font-size: clamp(2.2rem, 6vw, 3rem); }
    .hero .container { flex-direction: column; text-align: center; gap: 40px; }
    .hero-visual { margin-top: 40px; width: 100%; }
    .hero-img { max-width: 300px; margin: 0 auto; }
    .stages { grid-template-columns: repeat(2, 1fr); }
    .grid, .science-grid, .form-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; } /* Hide desktop nav on mobile/tablet to avoid overflow */
}

@media (max-width: 576px) {
    h1 { font-size: clamp(2.2rem, 10vw, 3.5rem); line-height: 1.1; }
    h2 { font-size: clamp(1.8rem, 8vw, 2.8rem); line-height: 1.2; }
    .container { padding: 0 24px; }
    .glass { padding: 40px 24px; }
    .stages { grid-template-columns: 1fr; gap: 20px; }
    .section { padding: 60px 0; }
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
}

/* Mobile Nav Styles */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--gold);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    transition: 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    z-index: 999;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1.5rem;
    font-family: 'Noto Serif SC', serif;
}

/* Differentiation Section Styles */
.differentiation {
    padding: 120px 0;
    background: rgba(255,255,255,0.01);
}

.diff-glass {
    border: 1px solid var(--gold) !important;
    background: rgba(212, 175, 55, 0.05) !important;
    padding: 80px 100px !important;
}

.diff-title {
    margin-bottom: 50px !important;
    font-size: 3.5rem !important;
}

.diff-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    text-align: left;
    align-items: center;
}

.diff-sub-label {
    color: var(--gold-bright);
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.diff-description {
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    font-size: 1rem;
}

.diff-list-container {
    padding-left: 40px;
    border-left: 1px solid var(--border-glass);
}

.diff-list {
    list-style: none;
    color: var(--gold-bright);
    line-height: 2.8;
    font-size: 1.05rem;
}

.diff-list li {
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    transition: transform 0.3s ease;
    white-space: nowrap; /* Avoid awkward wrapping */
}

.diff-list li:hover {
    transform: translateX(10px);
    color: var(--gold);
}

@media (max-width: 992px) {
    .diff-glass {
        padding: 60px 40px !important;
    }
    .diff-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .diff-list-container {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--border-glass);
        padding-top: 40px;
    }
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
    align-items: stretch; /* Ensure cards are same height */
}

.benefit-card {
    padding: 60px 45px;
    border-radius: 28px;
    position: relative;
    transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(15px);
    overflow: visible;
}

.benefit-card:hover {
    transform: translateY(-10px);
    background: rgba(212, 175, 55, 0.05);
    border-color: rgba(212, 175, 55, 0.3);
}

.tier-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    display: block;
}

.tier-label.highlight {
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.benefit-card h3 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.positioning {
    font-size: 1rem;
    color: var(--gold-bright);
    margin-bottom: 40px;
    padding-bottom: 25px;
    font-weight: 600;
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    min-height: 85px; /* Alignment anchor */
    display: flex;
    align-items: flex-start;
}

.benefit-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefit-list li {
    font-size: 0.88rem; /* Slightly smaller for better fit */
    margin-bottom: 16px;
    padding-left: 24px;
    position: relative;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.9);
    white-space: nowrap; /* Prevent messy wrapping */
}

.benefit-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: bold;
    opacity: 0.8;
}

.primary-tier {
    background: rgba(212, 175, 55, 0.06);
    border: 1px solid rgba(212, 175, 55, 0.4);
    transform: scale(1.05);
    z-index: 2;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 20px rgba(212, 175, 55, 0.1);
}

.primary-tier::after {
    content: '★ 首选核心席位';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #d4af37 0%, #f1d592 100%);
    color: #000;
    padding: 8px 28px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 900;
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4);
    white-space: nowrap;
    border: 2px solid rgba(0,0,0,0.1);
}

@media (max-width: 992px) {
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .benefit-card {
        padding: 50px 30px;
    }
    .benefit-list li {
        white-space: normal; /* Allow wrapping on mobile */
        padding-right: 10px;
    }
    .primary-tier {
        transform: scale(1);
        margin: 20px 0;
    }
    .primary-tier::after {
        top: -15px;
        padding: 6px 20px;
        font-size: 0.85rem;
    }
}

/* Footer Heading Optimization */
footer h2 {
    font-size: clamp(2.2rem, 8vw, 3.5rem);
    background: linear-gradient(135deg, #fff 0%, var(--gold) 50%, #fff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(212, 175, 55, 0.3);
    margin-bottom: 25px;
    letter-spacing: -1px;
    line-height: 1.2;
}

/* Breathing Pulse Animation */
@keyframes breathing-pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.6); }
    50% { transform: scale(1.12); box-shadow: 0 0 30px 15px rgba(212, 175, 55, 0.2); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

.btn-pulse {
    animation: breathing-pulse 2s infinite ease-in-out;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-bright) 100%) !important;
    position: relative;
    z-index: 1;
}

.btn-pulse:hover {
    animation-play-state: paused;
    transform: scale(1.1);
}