/* ============================================
   HHPOKER - Molten Metal Theme Stylesheet
   Theme: Molten Metal (熔岩金属风)
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    --forge-900: #0a0a0a;
    --forge-800: #0d0d0d;
    --forge-700: #1a1a1a;
    --forge-600: #252525;
    --molten-400: #ff6b00;
    --molten-500: #ff4500;
    --molten-600: #e63900;
    --metal-gold: #d4a745;
    --metal-silver: #c0c0c0;
    --metal-chrome: #e8e8e8;
    --metal-bronze: #cd7f32;
    --transition-speed: 0.3s;
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--forge-800);
    color: #fff;
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--forge-900);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--molten-600), var(--molten-400), var(--molten-600));
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--molten-400), var(--metal-gold), var(--molten-400));
}

/* ===== SELECTION ===== */
::selection {
    background: rgba(255, 107, 0, 0.3);
    color: #fff;
}

/* ===== MOLTEN GRADIENTS ===== */
.molten-gradient {
    background: linear-gradient(135deg, var(--molten-600), var(--molten-400), var(--molten-500), var(--molten-400), var(--molten-600));
    background-size: 300% 300%;
    animation: molten-flow 4s ease infinite;
}

.molten-gradient-light {
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.2), rgba(255, 69, 0, 0.3), rgba(255, 107, 0, 0.2));
    border: 1px solid rgba(255, 107, 0, 0.2);
}

.molten-btn {
    background: linear-gradient(135deg, var(--molten-600), var(--molten-400), var(--molten-500));
    background-size: 200% 200%;
    animation: molten-btn-shift 3s ease infinite;
    border: 1px solid rgba(255, 107, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.molten-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
}

.molten-btn:hover::before {
    opacity: 1;
}

.molten-btn:hover {
    box-shadow: 0 0 30px rgba(255, 107, 0, 0.4), 0 0 60px rgba(255, 107, 0, 0.15);
}

@keyframes molten-btn-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Metal text */
.metal-text {
    background: linear-gradient(180deg, var(--metal-chrome) 0%, var(--metal-silver) 30%, #808080 50%, var(--metal-silver) 70%, var(--metal-chrome) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.molten-glow-text {
    text-shadow: 0 0 20px rgba(255, 107, 0, 0.5), 0 0 40px rgba(255, 107, 0, 0.25), 0 0 80px rgba(255, 107, 0, 0.1);
}

/* ===== NAVBAR ===== */
#navbar {
    background: rgba(13, 13, 13, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

#navbar.scrolled {
    background: rgba(13, 13, 13, 0.95);
    border-bottom: 1px solid rgba(255, 107, 0, 0.15);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--molten-400);
    transition: width 0.3s ease;
}

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

/* Hamburger animation */
#hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
#hamburger.active span:nth-child(2) {
    opacity: 0;
}
#hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile menu */
#mobileMenu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== HERO ===== */
.hero-glow {
    background:
        radial-gradient(ellipse at 50% 40%, rgba(255, 107, 0, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 30% 60%, rgba(255, 69, 0, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(212, 167, 69, 0.06) 0%, transparent 50%);
}

@keyframes pulse-slow {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}
.animate-pulse-slow {
    animation: pulse-slow 3s ease-in-out infinite;
}

/* ===== METAL TEXTURE OVERLAY ===== */
.metal-texture {
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.01) 2px,
            rgba(255, 255, 255, 0.01) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.005) 2px,
            rgba(255, 255, 255, 0.005) 4px
        );
    pointer-events: none;
}

/* ===== FEATURE CARDS ===== */
.feature-card {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(255, 107, 0, 0.08);
}

.feature-card-inner {
    position: relative;
    background: linear-gradient(145deg, rgba(37, 37, 37, 0.9), rgba(26, 26, 26, 0.95));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1rem;
    padding: 2rem;
    height: 100%;
    z-index: 1;
}

.feature-card-border {
    position: absolute;
    inset: 0;
    border-radius: 1rem;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255, 107, 0, 0.05), rgba(212, 167, 69, 0.1), rgba(255, 107, 0, 0.05));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.3s ease;
    opacity: 0.3;
}

.feature-card:hover .feature-card-border {
    opacity: 1;
    background: linear-gradient(135deg, var(--molten-400), var(--metal-gold), var(--molten-500), var(--metal-gold), var(--molten-400));
    background-size: 300% 300%;
    animation: border-shift 4s ease infinite;
}

@keyframes border-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes molten-flow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ===== STATS SECTION ===== */
.stats-bg {
    background: linear-gradient(180deg,
        rgba(255, 107, 0, 0.08) 0%,
        rgba(255, 69, 0, 0.05) 30%,
        rgba(212, 167, 69, 0.03) 60%,
        rgba(255, 107, 0, 0.06) 100%
    );
}

.stat-card {
    padding: 2rem 1.5rem;
    border-radius: 1rem;
    background: linear-gradient(145deg, rgba(37, 37, 37, 0.6), rgba(26, 26, 26, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 107, 0, 0.15);
}

.stat-card:hover .stat-icon {
    border-color: rgba(255, 107, 0, 0.5);
    box-shadow: 0 0 20px rgba(255, 107, 0, 0.15);
}

.stat-icon {
    transition: all 0.3s ease;
}

/* ===== TESTIMONIALS ===== */
.testimonial-card {
    background: linear-gradient(145deg, rgba(37, 37, 37, 0.8), rgba(26, 26, 26, 0.9));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.testimonial-card::before {
    content: '\201C';
    position: absolute;
    top: 0.5rem;
    right: 1.2rem;
    font-size: 3rem;
    color: rgba(255, 107, 0, 0.1);
    font-family: serif;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 107, 0, 0.12);
}

/* ===== FAQ ACCORDION ===== */
.faq-item {
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(255, 107, 0, 0.15) !important;
}

.faq-item.active {
    border-color: rgba(255, 107, 0, 0.25) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 107, 0, 0.05);
}

.faq-header {
    cursor: pointer;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    border-color: rgba(255, 107, 0, 0.5);
    background: rgba(255, 107, 0, 0.1);
}

.faq-body {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-body {
    max-height: 300px;
}

/* ===== CTA SECTION ===== */
.cta-bg {
    background:
        radial-gradient(ellipse at 20% 30%, rgba(255, 107, 0, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 60%, rgba(255, 69, 0, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(212, 167, 69, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, var(--forge-800), rgba(26, 26, 26, 0.8));
}

.cta-lines {
    background-image:
        repeating-linear-gradient(45deg, rgba(255,107,0,0.05) 0px, rgba(255,107,0,0.05) 1px, transparent 1px, transparent 10px),
        repeating-linear-gradient(-45deg, rgba(255,107,0,0.03) 0px, rgba(255,107,0,0.03) 1px, transparent 1px, transparent 10px);
}

/* ===== BACK TO TOP & CS BUTTONS ===== */
#backToTop.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#csButton {
    animation: cs-pulse 2.5s ease-in-out infinite;
}

@keyframes cs-pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 107, 0, 0.3);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(255, 107, 0, 0);
    }
}

/* ===== ANIMATIONS ===== */
/* Fade in up */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1023px) {
    .feature-card-inner {
        padding: 1.5rem;
    }
}

@media (max-width: 767px) {
    #hero h1 {
        font-size: 2.25rem;
        line-height: 1.2;
    }

    .stat-card {
        padding: 1.5rem 1rem;
    }

    .stat-card .font-orbitron {
        font-size: 1.75rem;
    }

    #backToTop {
        bottom: 6rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }

    #csButton {
        bottom: 10rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

@media (max-width: 640px) {
    section {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }

    .feature-card-inner {
        padding: 1.25rem;
    }

    #hero h1 {
        font-size: 1.75rem;
    }
}