:root {
    --bg: #fdfdfd;
    --text-primary: #121212;
    --text-secondary: #555555;
    --accent: #d32f2f;
    /* Premium Manga Red */
    --gold: #b8860b;
    /* Dark Goldenrod */
    --border: #e0e0e0;
    --card-bg: #ffffff;
    --font-serif: "Noto Serif SC", "Georgia", serif;
    --font-sans: "Inter", "Noto Sans SC", "PingFang SC", sans-serif;
}

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

html {
    background-color: var(--bg);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
}

/* Broad Content Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    padding: 0 40px;
    transition: 0.3s;
}

/* Elegant Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 0.5px solid var(--border);
    transition: all 0.3s ease;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 400;
}

.logo img {
    height: 28px;
}

nav ul {
    display: flex;
    gap: 40px;
    list-style: none;
}

nav a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Hero Section - Editorial Style */
.hero {
    min-height: 90vh;
    padding: 180px 0 100px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
}

.hero-text {
    padding-right: 80px;
}

.hero-text h1 {
    font-family: var(--font-serif);
    font-size: clamp(4.5rem, 9vw, 6.5rem);
    line-height: 1.05;
    margin-bottom: 32px;
    font-weight: 400;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 48px;
}

.hero-image {
    height: 80vh;
    background: #f0f0f0;
    position: relative;
    overflow: hidden;
}

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

/* Downloaad Button - Elegant */
.btn-elegant {
    display: inline-block;
    padding: 18px 40px;
    background: var(--text-primary);
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    font-weight: 600;
    transition: 0.3s;
}

.btn-elegant:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

/* Editorial Sections */
.section-editorial {
    padding: 80px 0;
}

.section-label {
    font-size: 0.8rem;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.4em;
    margin-bottom: 20px;
    display: block;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    margin-bottom: 40px;
    line-height: 1.2;
    font-weight: 400;
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 40px;
}

.feature-card {
    grid-column: span 4;
    max-width: 400px;
    margin: 0 auto;
}

#features .container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 16px;
    font-weight: 400;
}

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

/* Large Editorial Block */
.editorial-block {
    grid-column: span 12;
    background: #f9f9f9;
    padding: 100px;
    display: flex;
    align-items: center;
    gap: 80px;
}

.editorial-block-text {
    flex: 1;
}

.editorial-block-image {
    flex: 1;
    height: 720px;
    background: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

/* Secondary Mockup (Detailed 1:1 Close-up) */
.phone-mockup-secondary {
    width: 340px;
    height: 680px;
    background: #000;
    border-radius: 50px;
    padding: 12px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.3), 0 0 0 10px #1a1a1a;
    position: relative;
    transform: none;
    transition: 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.phone-mockup-secondary:hover {
    transform: translateY(-10px);
    box-shadow: 0 60px 120px rgba(0, 0, 0, 0.4), 0 0 0 10px #222;
}

/* Stats Section */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    padding: 30px;
    border: 1px solid var(--border);
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Showcase Grid */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 60px;
}

.showcase-item {
    aspect-ratio: 9/16;
    background: #f5f5f5;
    overflow: hidden;
    position: relative;
    border-radius: 4px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.03);
    transition: 0.5s;
}

.showcase-item:hover {
    transform: scale(1.02);
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* QR Section */
.qr-section {
    background: #121212;
    color: #fff;
    padding: 100px 0;
    margin-top: 120px;
}

.qr-text {
    flex: 2;
}

.qr-code-box {
    flex: 1;
    background: #fff;
    padding: 20px;
    max-width: 240px;
    text-align: center;
}

.qr-code-box img {
    width: 100%;
    height: auto;
}

.qr-code-box span {
    color: #121212;
    font-size: 0.75rem;
    margin-top: 10px;
    display: block;
}

/* Footer - Clean and Structured */
footer {
    padding: 100px 20px 60px;
    border-top: 0.5px solid var(--border);
    margin-top: 100px;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 80px;
    margin-bottom: 100px;
}

.footer-col h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 30px;
    color: var(--text-secondary);
}

.footer-col ul {
    list-style: none;
}

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

.footer-col a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    opacity: 0.7;
    transition: 0.3s;
}

.footer-col a:hover {
    opacity: 1;
    color: var(--accent);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 0.5px solid var(--border);
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
}


/* Manga Grid for Density */
.manga-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.manga-card {
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    transition: 0.3s;
    border: 1px solid var(--border);
}

.manga-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.manga-cover {
    width: 100%;
    aspect-ratio: 3/4;
    background: #eee;
    object-fit: cover;
}

.manga-info {
    padding: 15px;
}

.manga-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.manga-tag {
    font-size: 0.75rem;
    color: var(--accent);
    background: rgba(211, 47, 47, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Tech Stack Section */
.tech-stack-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    opacity: 0.6;
    flex-wrap: wrap;
    margin-top: 40px;
}

.tech-item {
    font-size: 1.2rem;
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--text-secondary);
}


/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
    margin-top: 30px;
}

.category-item {
    background: #f5f5f5;
    padding: 20px;
    text-align: center;
    border-radius: 4px;
    transition: 0.3s;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid transparent;
}

.category-item:hover {
    background: #fff;
    border-color: var(--accent);
    transform: translateY(-3px);
}

.category-icon {
    font-size: 1.5rem;
    margin-bottom: 10px;
    display: block;
}

/* Update Feed */
.update-feed {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px;
    margin-top: 40px;
}

.update-row {
    display: grid;
    grid-template-columns: 100px 1fr 100px;
    padding: 15px 0;
    border-bottom: 0.5px solid var(--border);
    font-size: 0.9rem;
}

.update-row:last-child {
    border-bottom: none;
}

.update-time {
    color: var(--text-secondary);
}

.update-name {
    font-weight: 600;
    color: var(--text-primary);
}

.update-chapter {
    color: var(--accent);
    text-align: right;
}

/* Partner Row */
.partner-row {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    margin-top: 40px;
    filter: grayscale(1);
    opacity: 0.3;
}

.partner-logo {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    font-family: var(--font-serif);
}


/* Version History Timeline */
.version-section {
    background: #1a1a1a;
    color: #fff;
    padding: 100px 0;
}

.version-timeline {
    position: relative;
    max-width: 900px;
    margin: 60px auto 0;
}

.version-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.version-node {
    position: relative;
    padding-left: 0;
    margin-bottom: 60px;
}

.version-flex {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.version-logo-container {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
}

.version-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.version-content {
    flex: 1;
}

.btn-download-version {
    display: inline-flex;
    align-items: center;
    background: rgba(251, 200, 83, 0.1);
    color: var(--accent);
    padding: 8px 20px;
    border: 1px solid var(--accent);
    border-radius: 4px;
    font-size: 0.85rem;
    text-decoration: none;
    margin-top: 20px;
    font-weight: 600;
    transition: 0.3s;
}

.btn-download-version:hover {
    background: var(--accent);
    color: #1a1a1a;
}

.version-node h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-family: var(--font-serif);
    display: flex;
    align-items: center;
}

.version-tag {
    font-size: 0.7rem;
    background: var(--accent);
    padding: 2px 8px;
    border-radius: 2px;
    margin-left: 10px;
    vertical-align: middle;
}

.version-date {
    display: block;
    font-size: 0.85rem;
    opacity: 0.5;
    margin-bottom: 15px;
}

.version-desc {
    font-size: 1rem;
    opacity: 0.7;
    line-height: 1.6;
}

/* Phone Mockup in Hero */
.hero-image {
    background: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.phone-mockup {
    width: 380px;
    height: 760px;
    background: #000;
    border-radius: 50px;
    padding: 12px;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.2), 0 0 0 10px #1a1a1a;
    position: relative;
    transform: rotateY(-10deg) rotateX(5deg);
    transition: 0.5s;
}

.phone-mockup:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 40px;
    overflow: hidden;
    position: relative;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.phone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 30px;
    background: #000;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    z-index: 10;
}


/* App UI Internal Styles */
.app-ui {
    width: 100%;
    height: 100%;
    background: #121212;
    color: #fff;
    display: flex;
    flex-direction: column;
    font-size: 14px;
    font-family: var(--font-sans);
    overflow: hidden;
    text-align: left;
}

.app-header {
    padding: 30px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.app-avatar {
    width: 60px;
    height: 60px;
    background: #fbc853;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
}

.app-user-info {
    flex: 1;
}

.app-user-info h4 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: #fff;
}

.btn-register {
    background: #fbc853;
    color: #121212;
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    display: inline-block;
    text-decoration: none;
}

.app-stats-card {
    background: #1e1e1e;
    margin: 0 20px 20px;
    padding: 20px;
    border-radius: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    text-align: center;
}

.stat-group i {
    color: #fbc853;
    font-size: 0.9rem;
    margin-right: 5px;
}

.stat-val-app {
    font-size: 1.3rem;
    font-weight: 700;
    display: block;
    margin-top: 8px;
    color: #fff;
}

.stat-label-app {
    font-size: 0.75rem;
    opacity: 0.5;
    color: #fff;
}

.app-menu {
    padding: 0 20px;
}

.menu-item-app {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.menu-item-app:last-child {
    border-bottom: none;
}

.menu-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-icon {
    font-size: 1.1rem;
    opacity: 0.7;
}

.menu-arrow {
    opacity: 0.3;
    font-size: 0.8rem;
}

.app-banner {
    background: linear-gradient(90deg, #2c2518, #3d321d);
    margin: 10px 20px;
    padding: 15px 20px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 0.5px solid rgba(251, 200, 83, 0.15);
}

.banner-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: #fbc853;
}

.btn-qiandao {
    background: #fbc853;
    color: #121212;
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
}

.app-nav {
    background: #181818;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: 12px 0 25px;
    /* Extra padding for bottom home indicator */
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-item-app {
    text-align: center;
    font-size: 0.75rem;
    opacity: 0.4;
    color: #fff;
    cursor: pointer;
}

.nav-item-app.active {
    opacity: 1;
    color: #fbc853;
}


.nav-item-app div {
    margin-bottom: 5px;
}

.nav-item-app svg,
.menu-item-app svg {
    vertical-align: middle;
}

/* SVG Icon Coloring */
.menu-icon svg {
    color: #fbc853;
}

.nav-item-app svg {
    width: 22px;
    height: 22px;
    margin-bottom: 4px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.nav-item-app.active svg {
    color: #fbc853;
}

/* Avatar Img */
.app-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* Responsive Overrides */
@media (max-width: 1200px) {
    .footer-top {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .footer-col:last-child {
        display: none;
    }
}

@media (max-width: 1024px) {

    .container,
    .header-inner,
    .footer-inner {
        padding: 0 20px;
    }

    .section-editorial {
        padding: 60px 0;
    }

    .hero {
        grid-template-columns: 1fr !important;
        padding-top: 240px;
        min-height: auto;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 30px;
    }

    .section-label {
        margin-bottom: 12px;
        letter-spacing: 0.2em;
    }

    .stat-grid,
    .manga-grid,
    .showcase-grid,
    .tech-stack-row,
    .category-grid,
    .update-feed,
    .tech-spec-grid,
    .faq-grid {
        margin-top: 30px;
    }

    .hero-text {
        padding-right: 0;
        margin-bottom: 60px;
        text-align: center;
    }

    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-text div {
        justify-content: center;
    }

    .hero-image {
        height: 600px;
        transform: scale(0.85);
        margin-top: -40px;
    }

    .phone-mockup,
    .phone-mockup-secondary {
        transform: none !important;
        width: 300px;
        height: 600px;
        margin: 0 auto;
    }

    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

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

    #features {
        max-width: 600px;
        margin: 0 auto;
        overflow: hidden;
    }

    .feature-card {
        margin-bottom: 50px;
        max-width: 100%;
        text-align: left;
    }

    #features .section-grid {
        display: flex;
        flex-direction: column;
    }

    #features .container {
        max-width: 100%;
        padding: 0 25px;
    }

    .manga-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 15px;
    }

    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .update-time {
        display: none;
    }

    .partner-row {
        gap: 30px;
    }

    .version-timeline {
        margin-left: 20px;
    }

    .editorial-block {
        flex-direction: column;
        padding: 60px 40px;
        text-align: center;
    }

    .editorial-block-image {
        height: auto;
        margin-top: 40px;
    }
}

@media (max-width: 768px) {
    header {
        padding: 12px 0;
    }

    .header-inner {
        display: grid;
        grid-template-areas: 
            "logo actions"
            "nav nav";
        grid-template-columns: 1fr auto;
        align-items: center;
        gap: 15px;
    }

    .logo { 
        grid-area: logo; 
        width: auto !important;
        justify-content: flex-start !important;
        margin-bottom: 0 !important;
        font-size: 1.3rem !important;
    }

    .header-inner > div:last-child {
        grid-area: actions;
        display: flex;
        justify-content: flex-end;
    }

    nav { 
        grid-area: nav; 
        width: 100%;
        padding-top: 10px;
        border-top: 0.5px solid rgba(0,0,0,0.05);
    }

    nav ul {
        justify-content: space-between;
        gap: 10px;
    }

    nav a {
        font-size: 0.8rem;
    }

    .btn-elegant {
        padding: 10px 20px !important;
        font-size: 0.75rem !important;
        width: auto !important;
    }

    .hero {
        padding-top: 160px;
    }

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

    .footer-top {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-col {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-col .logo {
        justify-content: center;
        margin-bottom: 20px !important;
    }

    .footer-col p {
        padding-right: 0;
        max-width: 400px;
        margin: 0 auto;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .hero-grid {
        grid-template-columns: 1fr !important;
    }

    .feed-grid,
    .tech-spec-grid,
    .faq-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-text h1 {
        font-size: 3.8rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .btn-elegant {
        width: 100%;
        padding: 16px 20px;
        font-size: 0.85rem;
    }

    .hero-text div {
        flex-direction: column;
        gap: 15px;
    }

    .phone-mockup,
    .phone-mockup-secondary {
        width: 260px;
        height: 520px;
    }

    .hero-image {
        height: 550px;
        transform: scale(1);
    }

    .stat-number {
        font-size: 1.8rem;
    }

    nav ul {
        gap: 12px;
    }

    nav a {
        font-size: 0.75rem;
    }

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

    .editorial-block {
        padding: 40px 20px;
    }
}

/* Page Specific Responsive Adjustments */
@media (max-width: 1024px) {
    .versions-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
    }

    .versions-sidebar {
        position: static !important;
        margin-bottom: 60px;
    }

    .about-text-cols {
        columns: 1 !important;
    }

    .about-hero h1 {
        font-size: 3.5rem !important;
    }
}

@media (max-width: 768px) {
    .about-hero h1 {
        font-size: 2.8rem !important;
    }

    .tech-feature-grid {
        grid-template-columns: 1fr;
    }
}