:root {
    --bg-deep: #020208;
    --bg-dark: #08080f;
    --bg-section: #0a0a14;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-input: #1a1a20;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-muted: rgba(255, 255, 255, 0.35);

    --cyan: #6ec9ff;
    --blue: #2577ff;
    --indigo: #4b39ff;
    --purple: #8b5cf6;
    --magenta: #f654ff;
    --pink: #fe53ff;
    --orange: #ff8654;
    --gold: #fff2bc;
    --gold-dark: #cd720b;

    --gradient-rainbow: linear-gradient(90deg, #6ec9ff, #2577ff, #4b39ff, #f654ff, #fe53ff, #ff8654);
    --gradient-primary: linear-gradient(135deg, #4b39ff, #8b5cf6);
    --gradient-glow: linear-gradient(135deg, rgba(75, 57, 255, 0.3), rgba(139, 92, 246, 0.3));
    --gradient-text: linear-gradient(135deg, #6ec9ff, #2577ff, #8b5cf6, #f654ff);
    --gradient-gold: linear-gradient(90deg, #fff2bc, #cd720b);
    --gradient-stats: linear-gradient(135deg, #ff8654, #fe53ff, #2577ff, #6ec9ff);

    --glow-purple: rgba(75, 59, 220, 0.4);
    --glow-magenta: rgba(216, 28, 211, 0.25);
    --glow-blue: rgba(37, 119, 255, 0.2);

    --border-color: rgba(139, 92, 246, 0.12);
    --border-glow: rgba(139, 92, 246, 0.25);
    --shadow-glow: 0 0 40px rgba(75, 57, 255, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 90% 70% at 90% 40%, rgba(110, 201, 255, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 20%, rgba(37, 119, 255, 0.025) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 95% 60%, rgba(139, 92, 246, 0.02) 0%, transparent 50%);
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: radial-gradient(ellipse 60% 80% at 10% 50%, rgba(0, 0, 0, 0.4) 0%, transparent 60%);
}

::selection {
    background: var(--purple);
    color: #fff;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: var(--purple);
    border-radius: 3px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Glow Decorations ===== */
.glow {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    mix-blend-mode: screen;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(ellipse at center, rgba(110, 201, 255, 0.15) 0%, rgba(37, 119, 255, 0.08) 40%, transparent 70%);
    filter: blur(100px);
    top: -15%;
    right: -5%;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.1) 0%, rgba(75, 57, 255, 0.05) 40%, transparent 70%);
    filter: blur(90px);
    bottom: -20%;
    right: 10%;
}

.glow-3 {
    width: 700px;
    height: 400px;
    background: linear-gradient(90deg, transparent 0%, rgba(37, 119, 255, 0.04) 30%, rgba(110, 201, 255, 0.06) 60%, transparent 100%);
    filter: blur(80px);
    top: 30%;
    right: 0;
    transform: translateX(30%);
}

.glow-4 {
    width: 500px;
    height: 500px;
    background: radial-gradient(ellipse at center, rgba(37, 119, 255, 0.08) 0%, rgba(110, 201, 255, 0.04) 40%, transparent 70%);
    filter: blur(100px);
    bottom: -10%;
    right: 0;
}

/* ===== Sections ===== */
.section {
    position: relative;
    z-index: 1;
    padding: 120px 0;
    overflow: hidden;
    background: var(--bg-section);
}

#about {
    background: linear-gradient(110deg, #070710 0%, #0a0a16 40%, #0d0d1e 70%, #0f0f24 100%);
}

#contact {
    background: linear-gradient(110deg, #090914 0%, #0b0b18 40%, #0d0d1c 70%, #0f0f22 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header.left {
    text-align: left;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: 50px;
    color: var(--blue);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.gradient-rainbow-text {
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-stats-text {
    background: var(--gradient-stats);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-rainbow);
    color: #fff;
    box-shadow: 0 4px 25px rgba(75, 57, 255, 0.35);
    background-size: 200% auto;
    animation: rainbowShift 4s ease infinite;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(75, 57, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid rgba(139, 92, 246, 0.35);
}

.btn-outline:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: var(--purple);
    transform: translateY(-3px);
}

.btn-gold {
    background: var(--gradient-gold);
    color: #1a1a1a;
    font-weight: 700;
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(205, 114, 11, 0.4);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

@keyframes rainbowShift {
    0% { background-position: 0% center; }
    50% { background-position: 100% center; }
    100% { background-position: 0% center; }
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0,0,0,0.3) 0%, transparent 50%, rgba(110, 201, 255, 0.02) 100%);
    pointer-events: none;
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.08);
}

.nav-container {
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 48px;
    flex: 1;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.6rem;
    font-weight: 800;
}

@media (max-width: 768px) {
    .nav-logo {
        gap: 0;
    }

    .logo-text {
        display: none;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
        margin-right: 0;
    }
}

.logo-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-rainbow);
    border-radius: 12px;
    font-size: 1.3rem;
    color: #fff;
    background-size: 200% auto;
    animation: rainbowShift 4s ease infinite;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-download-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.nav-download-hint {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 4px 9px;
    border: 1px solid rgba(0, 212, 255, 0.28);
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.13), rgba(139, 92, 246, 0.16));
    box-shadow: 0 0 18px rgba(0, 212, 255, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.12);
    color: #c9fbff;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0.02em;
    white-space: nowrap;
    transform: translateY(-1px);
}

.nav-download-hint::before {
    content: '';
    width: 5px;
    height: 5px;
    margin-right: 5px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.8);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-rainbow);
    transition: var(--transition);
    border-radius: 1px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== Lang Toggle ===== */
.lang-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 14px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.lang-toggle:hover {
    border-color: rgba(139, 92, 246, 0.4);
    background: rgba(139, 92, 246, 0.06);
}

.lang-icon {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1;
}

.lang-toggle:hover .lang-icon {
    color: var(--cyan);
}

.lang-text {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1;
}

.login-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 50px;
    background: rgba(139, 92, 246, 0.08);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    line-height: 1;
}

.login-btn:hover {
    border-color: rgba(139, 92, 246, 0.4);
    background: rgba(139, 92, 246, 0.16);
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero ===== */
.pricing-hero {
    position: relative;
    z-index: 1;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(110deg, var(--bg-deep) 0%, #04040e 40%, #080818 70%, #0a0a1a 100%);
}

.pricing-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 60% at 90% 50%, rgba(37, 119, 255, 0.03) 0%, transparent 60%);
    pointer-events: none;
}

#hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(110deg, var(--bg-deep) 0%, #04040e 40%, #080818 70%, #0a0a1a 100%);
}

#hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 60% at 90% 50%, rgba(37, 119, 255, 0.03) 0%, transparent 60%);
    pointer-events: none;
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(75, 57, 255, 0.04) 0%, transparent 70%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--blue);
    font-weight: 500;
    margin-bottom: 32px;
    animation: fadeInDown 0.8s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    margin-bottom: 24px;
}

.title-line {
    display: block;
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
}

.title-line:first-child {
    animation: fadeInUp 0.8s ease 0.2s both;
}

.title-line.gradient-text {
    font-size: 3.2rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.service-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin: 0 auto 40px;
    padding: 0;
    animation: fadeInUp 0.8s ease 0.7s both;
    max-width: 640px;
}

.service-tag {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 1;
    padding: 16px 4px 14px;
    background: rgba(255, 255, 255, 0.04);
    border-right: 1px solid rgba(139, 92, 246, 0.1);
    transition: var(--transition);
    cursor: default;
    position: relative;
}

.service-tag:first-child {
    border-radius: 12px 0 0 12px;
}

.service-tag:last-child {
    border-radius: 0 12px 12px 0;
    border-right: none;
}

.service-tag:hover {
    background: rgba(255, 255, 255, 0.08);
}

.service-tag i {
    font-size: 1.4rem;
    color: rgba(110, 201, 255, 0.7);
    transition: var(--transition);
}

.service-tag:hover i {
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-tag span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.service-tag:hover span {
    color: var(--text-primary);
}

.scroll-indicator {
    position: absolute;
    bottom: -120px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: fadeInUp 0.8s ease 1.2s both;
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--blue);
    border-radius: 2px;
    animation: scrollDown 2s infinite;
}

/* ===== Features ===== */
#features {
    background: linear-gradient(110deg, var(--bg-deep) 0%, #080810 40%, #0c0c1a 70%, #0e0e20 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-rainbow);
    opacity: 0;
    transition: var(--transition);
    background-size: 200% auto;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 0 50px rgba(75, 57, 255, 0.08);
}

.feature-card:hover::before {
    opacity: 1;
    animation: rainbowShift 3s ease infinite;
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 92, 246, 0.08);
    border-radius: 14px;
    font-size: 1.5rem;
    color: var(--blue);
    margin-bottom: 24px;
    transition: var(--transition);
}

.feature-card:hover .card-icon {
    background: var(--gradient-rainbow);
    color: #fff;
    background-size: 200% auto;
    box-shadow: 0 0 25px rgba(75, 57, 255, 0.25);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Coming Soon state */
.feature-card.is-coming-soon {
    opacity: 0.5;
    filter: grayscale(0.7);
    cursor: not-allowed;
    position: relative;
}

.feature-card.is-coming-soon:hover {
    transform: none;
    border-color: var(--border-color);
    box-shadow: none;
}

.feature-card.is-coming-soon:hover::before,
.feature-card.is-coming-soon:hover .card-icon {
    opacity: 1;
    transform: none;
    background: var(--bg-card);
    color: var(--cyan);
    border-color: var(--border-color);
}

.coming-soon-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    padding: 3px 10px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.85), rgba(254, 83, 255, 0.85));
    border: 1px solid rgba(254, 83, 255, 0.4);
    border-radius: 999px;
    letter-spacing: 0.04em;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.coming-soon-badge-lg {
    position: static;
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    font-size: 0.78rem;
    margin-bottom: 16px;
}

.product-row.is-coming-soon {
    opacity: 0.5;
    filter: grayscale(0.7);
}

.product-cta.is-disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

.product-cta.is-disabled:hover {
    color: var(--text-muted);
    gap: 8px;
}

/* ===== Pain Points (Three Pain Points vs FengQiao AI) ===== */
.pp-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 56px;
    position: relative;
    z-index: 1;
}

.pp-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.pp-card:hover {
    transform: translateY(-6px);
    border-color: rgba(139, 92, 246, 0.4);
    box-shadow: 0 18px 60px rgba(75, 57, 255, 0.25);
}

.pp-problem {
    padding: 26px 24px 56px;
    background:
        linear-gradient(135deg, rgba(28, 16, 32, 0.95) 0%, rgba(20, 18, 30, 0.95) 100%);
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pp-problem-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    gap: 12px;
}

.pp-icon {
    width: 38px;
    height: 38px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.pp-icon-1 { background: rgba(110, 201, 255, 0.15); color: var(--cyan); border: 1px solid rgba(110, 201, 255, 0.3); }
.pp-icon-2 { background: rgba(139, 92, 246, 0.18); color: var(--purple); border: 1px solid rgba(139, 92, 246, 0.35); }
.pp-icon-3 { background: rgba(254, 83, 255, 0.15); color: #fe53ff; border: 1px solid rgba(254, 83, 255, 0.3); }

.pp-badges {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pp-urgent {
    padding: 3px 10px;
    background: rgba(255, 77, 79, 0.15);
    border: 1px solid rgba(255, 77, 79, 0.35);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #ff7875;
    letter-spacing: 0.04em;
}

.pp-stars {
    display: flex;
    gap: 2px;
    font-size: 0.7rem;
    color: #ff7875;
}

.pp-stars .far {
    color: rgba(255, 255, 255, 0.2);
}

.pp-problem-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    padding-left: 14px;
    line-height: 1.3;
}

.pp-problem-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: linear-gradient(180deg, #ff7875, #ff4d4f);
    border-radius: 2px;
}

.pp-problem-desc {
    font-size: 0.86rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.65;
}

.pp-vs {
    position: absolute;
    left: 50%;
    top: 197px;
    transform: translate(-50%, -50%);
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    z-index: 3;
    box-shadow:
        0 0 0 5px var(--bg-section),
        0 8px 24px rgba(75, 57, 255, 0.45);
    animation: rainbowShift 4s ease infinite;
}

.pp-solution {
    padding: 48px 24px 0;
    background: var(--bg-card);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.pp-solution-title {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 6px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbowShift 4s ease infinite;
    color: var(--cyan);
}

.pp-solution-tagline {
    font-size: 0.86rem;
    color: var(--text-secondary);
    margin-bottom: 22px;
    line-height: 1.5;
}

.pp-feats {
    list-style: none;
    margin: 0 0 24px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.pp-feats li {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    font-size: 0.83rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

.pp-feats li i {
    color: var(--cyan);
    font-size: 0.65rem;
    margin-top: 5px;
    flex-shrink: 0;
    background: rgba(110, 201, 255, 0.15);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pp-metric {
    margin: 0 -24px;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    position: relative;
}

.pp-accent-1-bg {
    background: linear-gradient(135deg, rgba(110, 201, 255, 0.18) 0%, rgba(37, 119, 255, 0.18) 100%);
}
.pp-accent-2-bg {
    background: linear-gradient(135deg, rgba(75, 57, 255, 0.22) 0%, rgba(139, 92, 246, 0.25) 100%);
}
.pp-accent-3-bg {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.25) 0%, rgba(254, 83, 255, 0.22) 100%);
}

.pp-metric-num {
    font-size: 1.45rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 6px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbowShift 4s ease infinite;
}

.pp-metric-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* ===== Product Detail (Kuaizi-style alternating rows) ===== */
.product-detail {
    margin-top: 100px;
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.product-row {
    display: flex;
    align-items: center;
    gap: 60px;
}

.product-row-reverse {
    flex-direction: row-reverse;
}

.product-visual {
    flex: 0 0 420px;
    height: 360px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(139, 92, 246, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.product-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(37, 119, 255, 0.06) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

.product-visual:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
}

.product-visual:hover::before {
    opacity: 1;
}

.product-visual-inner {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    color: var(--accent-blue);
    background: rgba(37, 119, 255, 0.08);
    border-radius: 24px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.product-visual:hover .product-visual-inner {
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    color: #fff;
    box-shadow: 0 0 30px rgba(75, 57, 255, 0.25);
}

.product-info {
    flex: 1;
    min-width: 0;
}

.product-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.product-tag {
    font-size: 0.82rem;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(110, 201, 255, 0.05);
    border: 1px solid rgba(139, 92, 246, 0.15);
    color: rgba(110, 201, 255, 0.85);
    white-space: nowrap;
    transition: var(--transition);
}

.product-tag:hover {
    background: rgba(110, 201, 255, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
    color: rgba(110, 201, 255, 1);
}

.product-info p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-blue);
    text-decoration: none;
    padding: 10px 24px;
    border-radius: 8px;
    background: rgba(37, 119, 255, 0.08);
    border: 1px solid rgba(37, 119, 255, 0.15);
    transition: var(--transition);
    cursor: pointer;
}

.product-cta i {
    font-size: 0.8rem;
    transition: var(--transition);
}

.product-cta:hover {
    background: rgba(37, 119, 255, 0.15);
    border-color: rgba(37, 119, 255, 0.3);
    gap: 12px;
}

.product-cta:hover i {
    transform: translateX(4px);
}

/* ===== Cases (Tab-based) ===== */
.cases-tabs {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 48px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(139, 92, 246, 0.08);
    border-radius: 14px;
    padding: 4px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cases-tab {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.cases-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.cases-tab.active {
    color: #fff;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    box-shadow: 0 0 20px rgba(75, 57, 255, 0.2);
}

.cases-panes {
    position: relative;
}

.cases-pane {
    display: none;
    align-items: center;
    gap: 60px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(139, 92, 246, 0.08);
    border-radius: 24px;
    padding: 48px;
    overflow: hidden;
    animation: fadeInPane 0.4s ease;
}

.cases-pane.active {
    display: flex;
}

@keyframes fadeInPane {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Partners ===== */
.partners-section {
    padding-bottom: 80px;
    overflow: hidden;
}

.partners-section .container {
    position: relative;
    z-index: 1;
}

.partners-track {
    position: relative;
    margin-top: 48px;
}

.partners-track::before,
.partners-track::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 120px;
    z-index: 2;
    pointer-events: none;
}

.partners-track::before {
    left: 0;
    background: linear-gradient(90deg, var(--bg-section) 0%, transparent 100%);
}

.partners-track::after {
    right: 0;
    background: linear-gradient(270deg, var(--bg-section) 0%, transparent 100%);
}

.partners-row {
    overflow: hidden;
    padding: 8px 0;
}

.partners-row-inner {
    display: flex;
    gap: 0;
    width: fit-content;
}

.partners-row.odd .partners-row-inner {
    animation: scrollRightToLeft 30s linear infinite;
}

.partners-row.even .partners-row-inner {
    animation: scrollLeftToRight 30s linear infinite;
}

@keyframes scrollRightToLeft {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes scrollLeftToRight {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

.partner-logo {
    flex-shrink: 0;
    width: 160px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 8px;
    border: 1px solid rgba(139, 92, 246, 0.1);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    font-size: 2.2rem;
    color: rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.partner-logo:hover {
    border-color: rgba(139, 92, 246, 0.25);
    color: var(--accent-blue);
    background: rgba(37, 119, 255, 0.05);
}

/* ===== Download Page ===== */
.download-hero {
    padding-top: 140px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #000 0%, #04040e 40%, #080818 70%, #0a0a1a 100%);
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-hero .hero-content {
    text-align: center;
    max-width: 800px;
    padding: 0 24px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.download-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(139, 92, 246, 0.08);
    border-radius: 20px;
    padding: 40px 32px;
    transition: var(--transition);
    cursor: default;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.download-card.available {
    cursor: pointer;
    border-color: rgba(139, 92, 246, 0.15);
}

.download-card.available::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    opacity: 0;
    transition: var(--transition);
}

.download-card.available:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(139, 92, 246, 0.25);
    transform: translateY(-4px);
}

.download-card.available:hover::before {
    opacity: 1;
}

.download-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.download-os-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    color: var(--accent-blue);
    background: rgba(37, 119, 255, 0.08);
    border-radius: 18px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.download-card.available:hover .download-os-icon {
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    color: #fff;
    box-shadow: 0 0 25px rgba(75, 57, 255, 0.2);
}

.download-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.download-meta {
    display: flex;
    justify-content: center;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.download-btn {
    display: inline-block;
    padding: 10px 28px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.download-card.available .download-btn {
    background: rgba(37, 119, 255, 0.1);
    border: 1px solid rgba(37, 119, 255, 0.2);
    color: var(--accent-blue);
}

.download-card.available:hover .download-btn {
    background: rgba(37, 119, 255, 0.2);
    border-color: rgba(37, 119, 255, 0.35);
}

.download-card.disabled .download-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
}

/* ===== Changelog ===== */
.changelog-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.changelog-item {
    display: flex;
    gap: 32px;
    position: relative;
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 60px;
    bottom: -40px;
    width: 1px;
    background: rgba(139, 92, 246, 0.1);
}

.changelog-item:last-child::before {
    display: none;
}

.changelog-version {
    flex-shrink: 0;
    width: 100px;
    text-align: right;
    padding-top: 4px;
}

.version-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    color: #fff;
    white-space: nowrap;
}

.version-date {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.changelog-content {
    flex: 1;
    padding-left: 32px;
    border-left: 2px solid rgba(139, 92, 246, 0.1);
    padding-bottom: 8px;
}

.changelog-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.changelog-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.changelog-content li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    padding-left: 18px;
    position: relative;
    margin-bottom: 4px;
}

.changelog-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-blue);
    opacity: 0.5;
}

@media (max-width: 768px) {
    .changelog-item {
        flex-direction: column;
        gap: 12px;
    }

    .changelog-item::before {
        display: none;
    }

    .changelog-version {
        width: auto;
        text-align: left;
    }

    .version-date {
        display: inline-block;
        margin-left: 12px;
        margin-top: 0;
    }

    .changelog-content {
        padding-left: 0;
        border-left: none;
        padding-left: 16px;
        border-left: 2px solid rgba(139, 92, 246, 0.1);
    }

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

@media (max-width: 480px) {
    .download-grid {
        grid-template-columns: 1fr;
    }
}

.cases-pane-img {
    flex: 0 0 380px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--accent-blue);
    background: radial-gradient(ellipse at 30% 40%, rgba(37, 119, 255, 0.08) 0%, rgba(139, 92, 246, 0.04) 50%, transparent 80%);
    border-radius: 16px;
    border: 1px solid rgba(139, 92, 246, 0.06);
    position: relative;
    overflow: hidden;
}

.cases-pane-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37, 119, 255, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.cases-pane-content {
    flex: 1;
    min-width: 0;
}

.cases-pane-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.cases-pane-tags span {
    font-size: 0.78rem;
    padding: 4px 14px;
    border-radius: 20px;
    background: rgba(110, 201, 255, 0.06);
    border: 1px solid rgba(110, 201, 255, 0.1);
    color: rgba(110, 201, 255, 0.8);
}

.cases-pane-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 14px;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
}

.cases-pane-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.cases-pane-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 28px;
}

.cases-pane-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cases-pane-stat strong {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cases-pane-stat span {
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
}

/* ===== Stats ===== */
.stats-section {
    background: linear-gradient(110deg, rgba(0,0,0,0.4) 0%, rgba(8,8,16,0.6) 40%, rgba(12,12,26,0.8) 70%, rgba(14,14,32,0.9) 100%),
                linear-gradient(135deg, rgba(37, 119, 255, 0.03), rgba(139, 92, 246, 0.03));
    border-top: 1px solid rgba(139, 92, 246, 0.06);
    border-bottom: 1px solid rgba(139, 92, 246, 0.06);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.stat-item {
    position: relative;
    padding: 32px 16px;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60px;
    background: rgba(139, 92, 246, 0.1);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-stats);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
}

.stat-suffix {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-stats);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 2px;
}

.stat-label {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ===== Pricing ===== */
#pricing {
    background: linear-gradient(110deg, #0c0c1a 0%, #0a0a14 40%, #06060e 70%, var(--bg-deep) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
}
.pricing-card .pricing-body {
    flex: 1;
}

.pricing-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 0 50px rgba(75, 57, 255, 0.08);
}

.pricing-card.featured {
    border: 2px solid transparent;
    background-clip: padding-box;
    background-image: linear-gradient(var(--bg-section), var(--bg-section)), var(--gradient-rainbow);
    background-origin: border-box;
    transform: scale(1.05);
    box-shadow: 0 0 50px rgba(75, 57, 255, 0.12);
}

.pricing-card.featured .pricing-header {
    border-bottom-color: rgba(139, 92, 246, 0.15);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-4px);
    box-shadow: 0 0 70px rgba(75, 57, 255, 0.2);
}

.pricing-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 16px;
    background: var(--gradient-rainbow);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    background-size: 200% auto;
    animation: rainbowShift 3s ease infinite;
    z-index: 1;
}

.pricing-header {
    padding: 40px 32px 24px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.plan-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    font-size: 1rem;
    color: var(--text-muted);
}

.pricing-body {
    padding: 24px 32px;
}

.plan-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.spec-item {
    text-align: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(139, 92, 246, 0.06);
}

.spec-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.spec-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
}

.plan-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.plan-features li i {
    color: var(--blue);
    font-size: 0.8rem;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 119, 255, 0.1);
    border-radius: 50%;
    flex-shrink: 0;
}

.pricing-footer {
    padding: 24px 32px 32px;
}

.pricing-cta {
    text-align: center;
    margin-top: 48px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.pricing-cta p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ===== Pricing V2 (refactored package cards) ===== */
.pricing-grid-v2 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
}

.pc-card {
    position: relative;
    background: var(--bg-section);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.25);
    min-height: 720px;
}

.pc-card:hover {
    transform: translateY(-6px);
    border-color: rgba(139, 92, 246, 0.35);
    box-shadow: 0 16px 60px rgba(75, 57, 255, 0.22);
}

.pc-card.featured {
    transform: scale(1.04);
    border-color: rgba(139, 92, 246, 0.35);
    box-shadow: 0 12px 60px rgba(75, 57, 255, 0.18);
    z-index: 1;
}

.pc-card.featured:hover {
    transform: scale(1.04) translateY(-6px);
    box-shadow: 0 18px 70px rgba(75, 57, 255, 0.28);
}

.pc-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 5px 14px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
    z-index: 5;
    animation: rainbowShift 3s ease infinite;
    box-shadow: 0 4px 16px rgba(75, 57, 255, 0.35);
}

.pc-top {
    position: relative;
    padding: 36px 28px 28px;
    color: #fff;
    overflow: hidden;
    isolation: isolate;
}

.pc-basic .pc-top { background: linear-gradient(135deg, #6ec9ff 0%, #2577ff 55%, #4b39ff 100%); }
.pc-pro .pc-top { background: linear-gradient(135deg, #2577ff 0%, #4b39ff 45%, #8b5cf6 100%); }
.pc-flagship .pc-top { background: linear-gradient(135deg, #4b39ff 0%, #8b5cf6 45%, #f654ff 100%); }

.pc-top::after {
    content: '';
    position: absolute;
    inset: auto 0 0 0;
    height: 50%;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.18) 100%);
    z-index: 0;
    pointer-events: none;
}

.pc-glow {
    position: absolute;
    top: -80px;
    right: -80px;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.22) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.pc-deco {
    position: absolute;
    top: 18px;
    right: 22px;
    font-size: 5rem;
    line-height: 1;
    color: rgba(255, 255, 255, 0.16);
    z-index: 0;
    pointer-events: none;
    filter: drop-shadow(0 0 24px rgba(255, 255, 255, 0.1));
}

.pc-head {
    position: relative;
    z-index: 2;
    margin-bottom: 16px;
    min-height: 64px;
}

.pc-name {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 4px;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    letter-spacing: 0.01em;
}

.pc-sub {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.78);
}

.pc-price {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 12px;
    color: #fff;
}

.pc-price-yen {
    font-size: 1.6rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.92);
}

.pc-price-num {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, #b3e0ff 0%, #7eb1ff 25%, #b39dff 50%, #ff9aff 75%, #ffb88a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.3));
}

.pc-price-unit {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.88);
    font-weight: 500;
    margin-left: 2px;
}

.pc-renewal {
    position: relative;
    z-index: 2;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 14px;
    line-height: 1.6;
}

.pc-tags {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.pc-tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.4;
}

.pc-tag-trial {
    background: rgba(0, 0, 0, 0.28);
    color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.pc-tag-renew {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.85), rgba(22, 163, 74, 0.95));
    color: #ecfdf5;
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.25);
}

.pc-cd {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 7px 14px;
    margin-bottom: 16px;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    letter-spacing: 0.04em;
}

.pc-cd-num {
    color: #fff;
    font-weight: 700;
    min-width: 22px;
    text-align: center;
}

.pc-cd i {
    color: rgba(255, 255, 255, 0.5);
    font-style: normal;
}

.pc-cta {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 22px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    animation: rainbowShift 4s ease infinite;
    color: #fff;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    box-shadow: 0 6px 24px rgba(75, 57, 255, 0.4);
    gap: 12px;
    margin-top: auto;
}

.pc-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 32px rgba(75, 57, 255, 0.55);
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    animation: rainbowShift 4s ease infinite;
}

.pc-cta-text {
    font-size: 0.98rem;
    color: #fff;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.pc-cta-text em {
    font-style: normal;
    margin-left: 4px;
    font-weight: 700;
    color: #fff;
    font-size: 1.1rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.pc-cta-bonus {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 0.88rem;
    color: #fff;
    font-weight: 800;
    white-space: nowrap;
}

.pc-cta-bonus i {
    color: #fff;
    font-size: 1.15rem;
    filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.5));
}

.pc-note {
    position: relative;
    z-index: 2;
    text-align: center;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.72);
    margin-top: 12px;
    margin-bottom: 0;
}

.pc-bottom {
    padding: 22px 28px 28px;
    background: var(--bg-section);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.pc-points {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 18px;
    position: relative;
    overflow: hidden;
}

.pc-points::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--gradient-rainbow);
    background-size: 200% 100%;
    animation: rainbowShift 4s ease infinite;
}

.pc-points-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.pc-points-row i {
    color: var(--cyan);
    font-size: 1rem;
    margin-right: 2px;
}

.pc-points-row strong {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
}

.pc-points-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.7;
    padding-left: 22px;
}

.pc-feat {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 11px;
    margin: 0;
    padding: 0;
}

.pc-feat li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.pc-feat-name {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pc-new {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 800;
    color: #22c55e;
    letter-spacing: 0.05em;
    background: rgba(34, 197, 94, 0.12);
    padding: 1px 5px;
    border-radius: 3px;
    line-height: 1.4;
    flex-shrink: 0;
}

.pc-hot {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, #ff4d4f 0%, #ff7a45 100%);
    padding: 1px 5px;
    border-radius: 3px;
    line-height: 1.4;
    flex-shrink: 0;
    box-shadow: 0 1px 4px rgba(255, 77, 79, 0.35);
    margin-left: 2px;
}

.pc-feat-tag {
    padding: 3px 9px;
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
    line-height: 1.5;
    border: 1px solid transparent;
}

.pc-tag-d9 { background: rgba(34, 197, 94, 0.18); color: #4ade80; border-color: rgba(34, 197, 94, 0.25); }
.pc-tag-d8 { background: rgba(34, 197, 94, 0.24); color: #22c55e; border-color: rgba(34, 197, 94, 0.32); }
.pc-tag-d7 { background: rgba(34, 197, 94, 0.3); color: #16a34a; border-color: rgba(34, 197, 94, 0.4); }
.pc-tag-d5 { background: rgba(168, 85, 247, 0.2); color: #c084fc; border-color: rgba(168, 85, 247, 0.3); }
.pc-tag-free { background: rgba(110, 201, 255, 0.15); color: var(--cyan); border-color: rgba(110, 201, 255, 0.25); }
.pc-tag-free-year { background: rgba(254, 83, 255, 0.16); color: #fe53ff; border-color: rgba(254, 83, 255, 0.28); }

/* ===== About ===== */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.about-tags span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(139, 92, 246, 0.06);
    border: 1px solid rgba(139, 92, 246, 0.12);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.about-tags span i {
    color: var(--blue);
}

.visual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.visual-item {
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.visual-item:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(75, 57, 255, 0.06);
}

.visual-item i {
    font-size: 2rem;
    color: var(--blue);
    margin-bottom: 12px;
}

.visual-item span {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
    background-size: 200% auto;
}

.visual-item small {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.contact-item:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateX(4px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 92, 246, 0.08);
    border-radius: 12px;
    font-size: 1.2rem;
    color: var(--blue);
    flex-shrink: 0;
}

.contact-detail {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-value {
    font-size: 1.05rem;
    font-weight: 600;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-input);
    border: 1px solid rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 119, 255, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid rgba(139, 92, 246, 0.06);
    padding: 64px 0 32px;
    background: linear-gradient(110deg, #06060e 0%, #04040a 40%, #020206 70%, var(--bg-deep) 100%);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(139, 92, 246, 0.06);
    margin-bottom: 32px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-logo i {
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--blue);
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}
.footer-bottom .icp-info {
    margin-top: 4px;
    font-size: 0.78rem;
}
.footer-bottom .icp-info a {
    color: var(--text-muted);
    text-decoration: none;
}
.footer-bottom .icp-info a:hover {
    color: var(--accent-blue);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes scrollDown {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2.2rem;
    }

    .title-line {
        font-size: 3rem;
    }

    .title-line.gradient-text {
        font-size: 2.4rem;
    }

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

    .product-row {
        flex-direction: column;
        gap: 40px;
    }

    .product-row-reverse {
        flex-direction: column;
    }

    .product-visual {
        flex: none;
        width: 100%;
        height: 280px;
    }

    .product-info h3 {
        font-size: 1.4rem;
    }

    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .pp-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }

    .pp-card {
        max-width: 480px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }

    .nav-left {
        gap: 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(0, 0, 0, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        padding: 80px 40px;
        transition: right 0.3s ease;
        gap: 24px;
        border-left: 1px solid rgba(139, 92, 246, 0.08);
        z-index: 999;
    }

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

    .nav-link {
        font-size: 1.1rem;
    }

    .nav-download-item {
        flex-direction: column;
        gap: 10px;
    }

    .nav-download-hint {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .title-line {
        font-size: 2.2rem;
    }

    .title-line.gradient-text {
        font-size: 1.8rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .partner-logo {
        width: 120px;
        height: 64px;
        font-size: 1.6rem;
    }

    .partners-track::before,
    .partners-track::after {
        width: 60px;
    }

    .cases-pane {
        flex-direction: column;
        padding: 32px;
    }

    .cases-pane-img {
        flex: none;
        width: 100%;
        height: 200px;
        font-size: 3rem;
    }

    .cases-pane-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .cases-tabs {
        flex-wrap: wrap;
    }

    .cases-tab {
        flex: 1 1 auto;
        font-size: 0.8rem;
        padding: 10px 14px;
    }

    .product-detail {
        gap: 60px;
        margin-top: 60px;
    }

    .product-row {
        flex-direction: column;
        gap: 32px;
    }

    .product-row-reverse {
        flex-direction: column;
    }

    .product-visual {
        flex: none;
        width: 100%;
        height: 220px;
    }

    .product-visual-inner {
        width: 72px;
        height: 72px;
        font-size: 2rem;
        border-radius: 18px;
    }

    .product-info h3 {
        font-size: 1.25rem;
    }

    .product-info p {
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-item:not(:last-child)::after {
        display: none;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .stat-suffix {
        font-size: 1.5rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-grid-v2 {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .pc-card.featured,
    .pc-card.featured:hover {
        transform: none;
    }

    .pc-deco {
        font-size: 4rem;
    }

    .pc-price-num {
        font-size: 2.8rem;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .visual-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}