/* ========================================
   太吾纪元 - 响应式官网样式
   设计主题：中国神话 / 洪荒西游
   ======================================== */

/* === CSS Variables === */
:root {
    --color-bg: #0a0a0f;
    --color-bg-alt: #111118;
    --color-bg-card: #151520;
    --color-gold: #d4a843;
    --color-gold-light: #f0d78c;
    --color-gold-dark: #a07828;
    --color-red: #c0392b;
    --color-red-light: #e74c3c;
    --color-red-dark: #8b1a1a;
    --color-white: #e8e0d0;
    --color-text: #b8b0a0;
    --color-text-dim: #6a6458;
    --color-border: #2a2a30;
    --color-border-gold: rgba(212, 168, 67, 0.3);
    --font-serif: 'Noto Serif SC', 'SimSun', serif;
    --font-sans: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --shadow-gold: 0 0 30px rgba(212, 168, 67, 0.15);
    --shadow-red: 0 0 30px rgba(192, 57, 43, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

/* === Section Common === */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--color-gold);
    letter-spacing: 4px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}

.section-subtitle {
    margin-top: 20px;
    font-size: 1.1rem;
    color: var(--color-text-dim);
    letter-spacing: 2px;
}

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

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1001;
}

.logo img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 2px solid var(--color-gold);
    box-shadow: 0 0 15px rgba(212, 168, 67, 0.3);
}

.logo span {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-gold-light);
    letter-spacing: 3px;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--color-text);
    letter-spacing: 1px;
    position: relative;
    padding: 6px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold-light);
}

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

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition);
    border-radius: 2px;
}

.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);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 120px 24px 80px;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(212, 168, 67, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
}

.hero-slider .slide.active {
    opacity: 1;
}

.hero-slider .slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-slider::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(10, 10, 15, 0.75) 0%,
        rgba(10, 10, 15, 0.6) 40%,
        rgba(10, 10, 15, 0.85) 100%
    );
    z-index: 1;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 2;
}

.slider-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dots .dot.active {
    background: var(--color-gold);
    box-shadow: 0 0 10px rgba(212, 168, 67, 0.5);
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-arrow:hover {
    background: rgba(212, 168, 67, 0.2);
    border-color: var(--color-gold);
}

.slider-arrow.prev { left: 24px; }
.slider-arrow.next { right: 24px; }

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 900;
    color: var(--color-gold-light);
    letter-spacing: 8px;
    text-shadow: 0 0 60px rgba(212, 168, 67, 0.3), 0 4px 8px rgba(0,0,0,0.5);
    margin-bottom: 16px;
    position: relative;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    color: var(--color-white);
    letter-spacing: 6px;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

/* Hero按钮QR码浮层包装 */
.btn-qr-wrapper {
    position: relative;
    display: inline-flex;
}

.hero-qr-popup {
    position: absolute;
    top: calc(100% + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-gold);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.6), 0 0 20px rgba(212,168,67,0.1);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 100;
    display: none;
    width: 160px;
}

.hero-qr-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.hero-qr-inner canvas,
.hero-qr-inner img {
    width: 140px !important;
    height: 140px !important;
    border-radius: 6px;
}

.hero-qr-inner span {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    letter-spacing: 1px;
}

/* 桌面端 hover 显示QR浮层 */
@media (hover: hover) and (min-width: 769px) {
    .hero-qr-popup {
        display: block;
    }
    
    .btn-qr-wrapper:hover .hero-qr-popup {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold), var(--color-gold-dark));
    color: #1a1a1a;
    box-shadow: 0 4px 20px rgba(212, 168, 67, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(212, 168, 67, 0.6);
}

.btn-outline {
    border: 2px solid var(--color-gold);
    color: var(--color-gold-light);
    background: transparent;
}

.btn-outline:hover {
    background: rgba(212, 168, 67, 0.1);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.2rem;
}

.hero-highlights {
    display: flex;
    gap: 40px;
    justify-content: center;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.highlight-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 8px rgba(212, 168, 67, 0.4));
}

.highlight-item span {
    font-size: 0.85rem;
    color: var(--color-gold);
    letter-spacing: 2px;
}

.scroll-indicator {
    position: absolute;
    bottom: 80px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-gold);
    border-bottom: 2px solid var(--color-gold);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.5; }
    50% { transform: rotate(45deg) translate(8px, 8px); opacity: 1; }
}

/* === About Section === */
.about {
    background: var(--color-bg-alt);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-gold), transparent);
}

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

.about-intro {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: 32px;
    text-indent: 2em;
}

.about-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--color-bg-card);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.info-card:hover {
    border-color: var(--color-border-gold);
    box-shadow: var(--shadow-gold);
}

.info-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.info-text h4 {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    letter-spacing: 1px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.info-text p {
    font-size: 1rem;
    color: var(--color-white);
    font-weight: 600;
}

.about-closing {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-gold-light);
    letter-spacing: 2px;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-gold);
}

.about-image img {
    border-radius: var(--radius-lg);
    transition: transform 0.6s ease;
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--color-border-gold);
    border-radius: var(--radius-lg);
    pointer-events: none;
}

/* === Features Section === */
.features {
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    border-color: var(--color-border-gold);
    box-shadow: var(--shadow-gold);
    transform: translateY(-4px);
}

.feature-image {
    height: 240px;
    overflow: hidden;
    position: relative;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.feature-card:hover .feature-image img {
    transform: scale(1.08);
}

.feature-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, var(--color-bg-card), transparent);
}

.feature-content {
    padding: 24px 28px 32px;
    position: relative;
}

.feature-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 900;
    color: rgba(212, 168, 67, 0.08);
    position: absolute;
    top: -8px;
    right: 20px;
    line-height: 1;
}

.feature-content h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--color-white);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.feature-content p {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.8;
}

/* === Screenshots Section === */
.screenshots {
    background: var(--color-bg-alt);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.screenshot-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 9/16;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.screenshot-item:hover {
    border-color: var(--color-gold);
    box-shadow: var(--shadow-gold);
    transform: translateY(-4px);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.screenshot-item:hover img {
    transform: scale(1.06);
}

.screenshot-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.screenshot-item:hover .screenshot-overlay {
    opacity: 1;
}

.zoom-icon {
    font-size: 2rem;
    color: var(--color-gold);
    transform: scale(0.8);
    transition: var(--transition);
}

.screenshot-item:hover .zoom-icon {
    transform: scale(1);
}

/* === Benefits Section === */
.benefits {
    position: relative;
}

.benefits::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-gold), transparent);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.benefits-grid .benefit-card:first-child {
    grid-column: 1 / -1;
    max-width: 500px;
    justify-self: center;
}

.benefit-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
    opacity: 0;
    transition: var(--transition);
}

.benefit-card:hover {
    border-color: var(--color-border-gold);
    box-shadow: var(--shadow-gold);
    transform: translateY(-4px);
}

.benefit-card:hover::before {
    opacity: 1;
}

.benefit-card.featured {
    border-color: var(--color-gold-dark);
    background: linear-gradient(180deg, rgba(212, 168, 67, 0.08), var(--color-bg-card));
    box-shadow: var(--shadow-gold);
}

.benefit-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--color-red), var(--color-red-light));
    color: white;
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 1px;
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 8px rgba(212, 168, 67, 0.3));
}

.benefit-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-gold-light);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.benefit-card p {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.7;
}

/* === Download Section === */
.download {
    background: var(--color-bg-alt);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 67, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

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

.download-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.2rem);
    color: var(--color-white);
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.download-desc {
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 36px;
    line-height: 1.8;
}

.download-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 28px;
    border-radius: var(--radius);
    transition: var(--transition);
    min-width: 180px;
}

.btn-ios {
    background: #1a1a1a;
    color: white;
    border: 1px solid #444;
}

.btn-ios:hover {
    background: #2a2a2a;
    border-color: #888;
    transform: translateY(-2px);
}

.btn-android {
    background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
    color: #1a1a1a;
}

.btn-android:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(212, 168, 67, 0.4);
}

.dl-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.dl-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.dl-text small {
    font-size: 0.65rem;
    letter-spacing: 1px;
    opacity: 0.7;
    font-weight: 400;
}

.download-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    justify-content: center;
}

.qr-placeholder {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--color-border-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    padding: 6px;
}

.qr-placeholder canvas,
.qr-placeholder img {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
    display: block;
}

.download-qr span {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    letter-spacing: 1px;
}



/* === Friend Links === */
.friend-links {
    padding: 30px 0;
    border-top: 1px solid var(--color-border);
    margin-bottom: 10px;
}

.friend-links-title {
    font-size: 0.85rem;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.friend-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
}

.friend-links-list a {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    transition: var(--transition);
    position: relative;
}

.friend-links-list a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-gold);
    transition: width 0.3s ease;
}

.friend-links-list a:hover {
    color: var(--color-gold);
}

.friend-links-list a:hover::after {
    width: 100%;
}

/* === Footer === */
.footer {
    background: #08080d;
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 280px;
}

.footer-brand img {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    border: 2px solid var(--color-gold);
    margin-bottom: 16px;
}

.footer-brand h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--color-gold-light);
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-col h4 {
    font-size: 0.85rem;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    line-height: 1.8;
}

/* === Article Pages === */
.article-hero {
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    padding: 120px 0 60px;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.article-hero .back-link {
    display: inline-block;
    color: var(--color-gold);
    font-size: 0.9rem;
    margin-bottom: 24px;
    transition: var(--transition);
    letter-spacing: 1px;
}

.article-hero .back-link:hover {
    color: var(--color-gold-light);
}

.article-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.article-summary {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.8;
}

.article-content {
    padding: 60px 0 80px;
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
}

.article-body h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-gold-light);
    margin: 48px 0 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-gold);
    letter-spacing: 2px;
}

.article-body p {
    font-size: 1rem;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 24px;
    text-indent: 2em;
}

.hero-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin-bottom: 20px;
    transition: var(--transition);
    border-left: 3px solid var(--color-gold-dark);
}

.hero-card:hover {
    border-color: var(--color-border-gold);
    box-shadow: 0 4px 20px rgba(212, 168, 67, 0.1);
}

.hero-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-white);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.hero-card p {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 14px;
    text-indent: 0;
}

.hero-tag {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--color-gold);
    background: rgba(212, 168, 67, 0.1);
    border: 1px solid rgba(212, 168, 67, 0.25);
    border-radius: 20px;
    padding: 3px 12px;
    margin-right: 8px;
    letter-spacing: 1px;
}

/* === Strategy Section === */
.strategy {
    background: var(--color-bg);
    position: relative;
}

.strategy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-gold), transparent);
}

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

.strategy-card {
    display: block;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 30px 24px;
    transition: var(--transition);
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.strategy-card:hover {
    border-color: var(--color-border-gold);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(212, 168, 67, 0.15);
}

.strategy-card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.strategy-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    color: var(--color-gold-light);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.strategy-card p {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === Lightbox === */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(10px);
}

.lightbox.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox.active .lightbox-img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 40px;
    font-size: 3rem;
    color: var(--color-white);
    cursor: pointer;
    z-index: 2001;
    transition: var(--transition);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.lightbox-close:hover {
    color: var(--color-gold);
    background: rgba(255, 255, 255, 0.05);
}

.lightbox-caption {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* === Back to Top === */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 900;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-gold);
    color: var(--color-gold);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-gold-dark);
    color: #fff;
    border-color: var(--color-gold);
    box-shadow: 0 0 20px rgba(212, 168, 67, 0.3);
}

/* === Scroll Animations === */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* === Responsive === */
@media (max-width: 1024px) {
    .section { padding: 80px 0; }
    
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

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

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

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

    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .download-buttons {
        justify-content: center;
    }

    .download-qr {
        flex-direction: row;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .section-header { margin-bottom: 40px; }

    /* Mobile nav */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(15, 15, 20, 0.98);
        backdrop-filter: blur(20px);
        padding: 100px 40px 40px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--color-border);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 24px;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-highlights {
        gap: 24px;
    }

    .highlight-item span {
        font-size: 0.75rem;
    }

    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .screenshot-item {
        aspect-ratio: 9/16;
    }

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

    .benefits-grid .benefit-card:first-child {
        max-width: 100%;
    }

    .about-info {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
    }

    .slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .slider-arrow.prev { left: 10px; }
    .slider-arrow.next { right: 10px; }
}

@media (max-width: 480px) {
    .hero-title {
        letter-spacing: 4px;
    }

    .hero-subtitle {
        letter-spacing: 3px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-highlights {
        flex-direction: column;
        gap: 16px;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
        max-width: 280px;
        margin: 0 auto;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-download {
        width: 100%;
        max-width: 260px;
        justify-content: center;
    }

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

    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}