/* ============================================
   MV视觉志 - 主样式表
   设计风格：胶片色彩浓郁风
   CSS前缀：mv-
   ============================================ */

/* --- Google Fonts Local Fallback --- */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&display=swap');

/* --- CSS Variables --- */
:root {
    --mv-primary: #E63946;
    --mv-secondary: #457B9D;
    --mv-accent: #F1FAEE;
    --mv-text: #1D3557;
    --mv-link: #A8DADC;
    --mv-dark: #0d1b2a;
    --mv-grain-opacity: 0.04;
    --mv-font-heading: 'Bebas Neue', 'Arial Black', sans-serif;
    --mv-font-body: 'Source Han Sans', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --mv-radius: 4px;
    --mv-shadow: 0 4px 20px rgba(0,0,0,0.3);
    --mv-transition: 0.3s ease;
}

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

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

body {
    font-family: var(--mv-font-body);
    color: var(--mv-text);
    background-color: var(--mv-dark);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--mv-primary);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--mv-font-heading);
    letter-spacing: 0.05em;
    line-height: 1.2;
}

/* --- Film Grain Overlay --- */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    opacity: var(--mv-grain-opacity);
}

/* --- Jammer Block (Hidden) --- */
.tone-jammer-block {
    display: none !important;
}

/* --- Navigation --- */
#mv-header {
    width: 100%;
    background: rgba(13, 27, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(168, 218, 220, 0.15);
}

.mv-nav-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mv-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.mv-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--mv-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.mv-logo-icon::before {
    content: '';
    width: 0;
    height: 0;
    border-left: 12px solid var(--mv-accent);
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    margin-left: 3px;
}

.mv-logo-icon::after {
    content: '';
    position: absolute;
    width: 32px;
    height: 32px;
    border: 2px solid rgba(241, 250, 238, 0.4);
    border-radius: 50%;
}

.sp-logo-text {
    font-family: var(--mv-font-heading);
    font-size: 1.5rem;
    color: var(--mv-accent);
    letter-spacing: 0.1em;
}

.mv-nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.mv-nav-links a {
    font-family: var(--mv-font-body);
    font-size: 0.9rem;
    color: var(--mv-accent);
    padding: 0.4rem 0;
    position: relative;
    transition: color var(--mv-transition), text-shadow var(--mv-transition);
}

.mv-nav-links a:hover,
.mv-nav-links a.mv-active {
    color: var(--mv-link);
    text-shadow: 0 0 10px rgba(168, 218, 220, 0.5);
}

.mv-nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--mv-primary);
    transition: width var(--mv-transition);
}

.mv-nav-links a:hover::after,
.mv-nav-links a.mv-active::after {
    width: 100%;
}

/* --- Hamburger Menu --- */
.mv-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    z-index: 1100;
}

.mv-hamburger span {
    width: 28px;
    height: 2px;
    background: var(--mv-accent);
    transition: all var(--mv-transition);
}

.mv-hamburger.mv-open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mv-hamburger.mv-open span:nth-child(2) {
    opacity: 0;
}

.mv-hamburger.mv-open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Mobile Menu --- */
.mv-mobile-menu {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(13, 27, 42, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    overflow: hidden;
    transition: height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.mv-mobile-menu.mv-open {
    height: 100vh;
}

.mv-mobile-menu a {
    font-family: var(--mv-font-heading);
    font-size: 2rem;
    color: var(--mv-accent);
    letter-spacing: 0.15em;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

.mv-mobile-menu.mv-open a {
    opacity: 1;
    transform: translateY(0);
}

.mv-mobile-menu a:hover {
    color: var(--mv-primary);
}

/* --- Hero Section --- */
.mv-hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--mv-dark);
}

.mv-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    filter: saturate(1.3);
}

.mv-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(13,27,42,0.4) 0%, rgba(13,27,42,0.8) 100%);
}

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

.mv-hero-slogan {
    font-family: var(--mv-font-heading);
    font-size: 4rem;
    color: var(--mv-accent);
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    text-shadow: 0 0 40px rgba(230, 57, 70, 0.5);
}

.mv-hero-desc {
    font-size: 1.15rem;
    color: rgba(241, 250, 238, 0.85);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.mv-btn-primary {
    display: inline-block;
    padding: 0.85rem 2.5rem;
    background: var(--mv-primary);
    color: var(--mv-accent);
    font-family: var(--mv-font-heading);
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    border: none;
    border-radius: var(--mv-radius);
    cursor: pointer;
    transition: all var(--mv-transition);
    position: relative;
    overflow: hidden;
}

.mv-btn-primary:hover {
    background: #c1303b;
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(230, 57, 70, 0.4);
    color: var(--mv-accent);
}

.mv-btn-secondary {
    display: inline-block;
    padding: 0.85rem 2.5rem;
    background: transparent;
    color: var(--mv-accent);
    font-family: var(--mv-font-heading);
    font-size: 1.1rem;
    letter-spacing: 0.1em;
    border: 2px solid var(--mv-accent);
    border-radius: var(--mv-radius);
    cursor: pointer;
    transition: all var(--mv-transition);
    margin-left: 1rem;
}

.mv-btn-secondary:hover {
    background: var(--mv-accent);
    color: var(--mv-dark);
}

/* --- Section Common --- */
.mv-section {
    padding: 5rem 2rem;
    max-width: 1440px;
    margin: 0 auto;
}

.mv-section-title {
    font-family: var(--mv-font-heading);
    font-size: 2.5rem;
    color: var(--mv-accent);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.mv-section-subtitle {
    font-size: 1rem;
    color: rgba(168, 218, 220, 0.7);
    margin-bottom: 3rem;
    max-width: 700px;
}

.mv-section-dark {
    background: var(--mv-dark);
}

.mv-section-alt {
    background: #0a1628;
}

/* --- Polaroid Card (Director Spotlight) --- */
.mv-polaroid-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.mv-polaroid-card {
    background: #fff;
    padding: 1rem 1rem 2rem;
    border-radius: 2px;
    box-shadow: var(--mv-shadow);
    transition: transform var(--mv-transition);
    cursor: pointer;
}

.mv-polaroid-card:hover {
    transform: rotate(-2deg) scale(1.03);
}

.mv-polaroid-img-wrap {
    overflow: hidden;
    aspect-ratio: 3/4;
    margin-bottom: 1rem;
}

.mv-polaroid-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.6s ease;
}

.mv-polaroid-card:hover .mv-polaroid-img {
    filter: grayscale(0%) saturate(1.4);
}

.mv-polaroid-name {
    font-family: var(--mv-font-heading);
    font-size: 1.3rem;
    color: var(--mv-text);
    margin-bottom: 0.3rem;
}

.mv-polaroid-quote {
    font-size: 0.85rem;
    color: #666;
    font-style: italic;
}

/* --- BTS Section --- */
.mv-bts-card {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
    background: rgba(69, 123, 157, 0.1);
    border-radius: var(--mv-radius);
    overflow: hidden;
    border: 1px solid rgba(168, 218, 220, 0.15);
}

.mv-bts-img-wrap {
    overflow: hidden;
    aspect-ratio: 16/9;
}

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

.mv-bts-card:hover .mv-bts-img {
    transform: scale(1.05);
}

.mv-bts-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.mv-bts-tag {
    font-family: var(--mv-font-heading);
    font-size: 0.85rem;
    color: var(--mv-primary);
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
}

.mv-bts-title {
    font-family: var(--mv-font-heading);
    font-size: 1.8rem;
    color: var(--mv-accent);
    margin-bottom: 1rem;
}

.mv-bts-excerpt {
    color: rgba(241, 250, 238, 0.7);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* --- Color Grading Lab --- */
.mv-color-lab {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.mv-color-compare {
    position: relative;
    overflow: hidden;
    border-radius: var(--mv-radius);
    aspect-ratio: 16/9;
    cursor: pointer;
}

.mv-color-compare img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mv-color-label {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background: rgba(13, 27, 42, 0.8);
    color: var(--mv-accent);
    padding: 0.3rem 0.8rem;
    font-family: var(--mv-font-heading);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    border-radius: var(--mv-radius);
}

/* --- Gear Section --- */
.mv-gear-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.mv-gear-card {
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    overflow: hidden;
    transition: transform var(--mv-transition), border-color var(--mv-transition);
}

.mv-gear-card:hover {
    transform: translateY(-5px);
    border-color: var(--mv-primary);
}

.mv-gear-img-wrap {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.mv-gear-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mv-gear-info {
    padding: 1.5rem;
}

.mv-gear-name {
    font-family: var(--mv-font-heading);
    font-size: 1.2rem;
    color: var(--mv-accent);
    margin-bottom: 0.5rem;
}

.mv-gear-specs {
    font-size: 0.85rem;
    color: rgba(168, 218, 220, 0.6);
    line-height: 1.6;
}

/* --- Visual Dictionary --- */
.mv-dict-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.mv-dict-item {
    display: flex;
    gap: 1.5rem;
    background: rgba(69, 123, 157, 0.08);
    padding: 1.5rem;
    border-radius: var(--mv-radius);
    border: 1px solid rgba(168, 218, 220, 0.1);
    transition: border-color var(--mv-transition);
}

.mv-dict-item:hover {
    border-color: var(--mv-secondary);
}

.mv-dict-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: var(--mv-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mv-font-heading);
    font-size: 1.5rem;
    color: var(--mv-accent);
}

.mv-dict-term {
    font-family: var(--mv-font-heading);
    font-size: 1.2rem;
    color: var(--mv-accent);
    margin-bottom: 0.3rem;
}

.mv-dict-def {
    font-size: 0.9rem;
    color: rgba(241, 250, 238, 0.7);
    line-height: 1.7;
}

/* --- Challenge Section --- */
.mv-challenge-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.mv-challenge-current {
    background: rgba(230, 57, 70, 0.1);
    border: 1px solid rgba(230, 57, 70, 0.3);
    border-radius: var(--mv-radius);
    padding: 2rem;
}

.mv-challenge-past {
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    padding: 2rem;
}

.mv-challenge-label {
    font-family: var(--mv-font-heading);
    font-size: 0.85rem;
    color: var(--mv-primary);
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
}

.mv-challenge-theme {
    font-family: var(--mv-font-heading);
    font-size: 1.8rem;
    color: var(--mv-accent);
    margin-bottom: 1rem;
}

.mv-challenge-desc {
    color: rgba(241, 250, 238, 0.7);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* --- Collab Board --- */
.mv-collab-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.mv-collab-item {
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    padding: 1.5rem;
    transition: border-color var(--mv-transition);
}

.mv-collab-item:hover {
    border-color: var(--mv-link);
}

.mv-collab-role {
    font-family: var(--mv-font-heading);
    font-size: 0.8rem;
    color: var(--mv-primary);
    letter-spacing: 0.15em;
    margin-bottom: 0.3rem;
}

.mv-collab-title {
    font-family: var(--mv-font-heading);
    font-size: 1.2rem;
    color: var(--mv-accent);
    margin-bottom: 0.5rem;
}

.mv-collab-detail {
    font-size: 0.9rem;
    color: rgba(241, 250, 238, 0.6);
    line-height: 1.6;
}

/* --- Academy Section --- */
.mv-academy-card {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    overflow: hidden;
}

.mv-academy-img-wrap {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.mv-academy-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mv-academy-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.mv-academy-date {
    font-family: var(--mv-font-heading);
    font-size: 0.85rem;
    color: var(--mv-primary);
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
}

.mv-academy-title {
    font-family: var(--mv-font-heading);
    font-size: 1.6rem;
    color: var(--mv-accent);
    margin-bottom: 0.8rem;
}

.mv-academy-speaker {
    font-size: 0.9rem;
    color: var(--mv-link);
    margin-bottom: 0.8rem;
}

.mv-academy-desc {
    font-size: 0.9rem;
    color: rgba(241, 250, 238, 0.7);
    line-height: 1.7;
}

/* --- Hall of Fame --- */
.mv-fame-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.mv-fame-card {
    text-align: center;
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    padding: 2rem;
    transition: border-color var(--mv-transition), transform var(--mv-transition);
}

.mv-fame-card:hover {
    border-color: #d4a843;
    transform: translateY(-5px);
}

.mv-fame-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    border: 3px solid #d4a843;
}

.mv-fame-name {
    font-family: var(--mv-font-heading);
    font-size: 1.3rem;
    color: var(--mv-accent);
    margin-bottom: 0.3rem;
}

.mv-fame-award {
    font-size: 0.85rem;
    color: #d4a843;
    margin-bottom: 0.5rem;
}

.mv-fame-work {
    font-size: 0.85rem;
    color: rgba(241, 250, 238, 0.6);
}

/* --- Footer --- */
#mv-footer {
    background: #060e1a;
    border-top: 1px solid rgba(168, 218, 220, 0.1);
    padding: 3rem 2rem 1.5rem;
}

.mv-footer-inner {
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.mv-footer-col h4 {
    font-family: var(--mv-font-heading);
    font-size: 1.1rem;
    color: var(--mv-accent);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.mv-footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(241, 250, 238, 0.6);
    margin-bottom: 0.5rem;
    transition: color var(--mv-transition);
}

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

.mv-social-links {
    display: flex;
    gap: 1rem;
}

.mv-social-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(168, 218, 220, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mv-accent);
    font-size: 0.85rem;
    transition: background var(--mv-transition);
}

.mv-social-icon:hover {
    background: var(--mv-primary);
}

.mv-footer-bottom {
    max-width: 1440px;
    margin: 0 auto;
    border-top: 1px solid rgba(168, 218, 220, 0.08);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(241, 250, 238, 0.4);
    line-height: 2;
}

.mv-footer-bottom a {
    color: rgba(241, 250, 238, 0.5);
}

.mv-footer-bottom a:hover {
    color: var(--mv-link);
}

.mv-footer-honor {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: #d4a843;
    font-size: 0.85rem;
}

.mv-honor-badge {
    width: 20px;
    height: 20px;
    background: #d4a843;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
    color: var(--mv-dark);
    font-weight: bold;
}

/* --- Inner Page Banner --- */
.mv-page-banner {
    position: relative;
    width: 100%;
    min-height: 45vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.mv-page-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    filter: saturate(1.2);
}

.mv-page-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(13,27,42,0.5) 0%, rgba(13,27,42,0.9) 100%);
}

.mv-page-banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 2rem;
}

.mv-page-banner-title {
    font-family: var(--mv-font-heading);
    font-size: 3rem;
    color: var(--mv-accent);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.mv-page-banner-desc {
    font-size: 1rem;
    color: rgba(241, 250, 238, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Content Area --- */
.mv-content-area {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.mv-content-area p {
    color: rgba(241, 250, 238, 0.8);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 1.5rem;
}

.mv-content-area h2 {
    font-family: var(--mv-font-heading);
    font-size: 1.8rem;
    color: var(--mv-accent);
    margin: 2rem 0 1rem;
}

.mv-content-area h3 {
    font-family: var(--mv-font-heading);
    font-size: 1.4rem;
    color: var(--mv-link);
    margin: 1.5rem 0 0.8rem;
}

/* --- Video Grid for Inner Pages --- */
.mv-video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.mv-video-card {
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    overflow: hidden;
    transition: transform var(--mv-transition), border-color var(--mv-transition);
}

.mv-video-card:hover {
    transform: translateY(-5px);
    border-color: var(--mv-primary);
}

.mv-video-thumb {
    aspect-ratio: 16/9;
    overflow: hidden;
    position: relative;
}

.mv-video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: filter 0.5s ease;
}

.mv-video-card:hover .mv-video-thumb img {
    filter: grayscale(0%) saturate(1.4);
}

.mv-video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: rgba(230, 57, 70, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mv-video-play::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 14px solid var(--mv-accent);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    margin-left: 3px;
}

.mv-video-info {
    padding: 1.2rem;
}

.mv-video-title {
    font-family: var(--mv-font-heading);
    font-size: 1.1rem;
    color: var(--mv-accent);
    margin-bottom: 0.3rem;
}

.mv-video-meta {
    font-size: 0.8rem;
    color: rgba(168, 218, 220, 0.6);
}

/* --- Tiaose Tai (Color Grading Tool) --- */
.mv-tiaose-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    min-height: 70vh;
}

.mv-tiaose-sidebar {
    background: rgba(69, 123, 157, 0.08);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    padding: 1.5rem;
}

.mv-tiaose-upload {
    border: 2px dashed rgba(168, 218, 220, 0.3);
    border-radius: var(--mv-radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--mv-transition);
    margin-bottom: 1.5rem;
}

.mv-tiaose-upload:hover {
    border-color: var(--mv-primary);
}

.mv-tiaose-upload-icon {
    font-size: 2.5rem;
    color: var(--mv-secondary);
    margin-bottom: 0.5rem;
}

.mv-tiaose-upload-text {
    font-size: 0.9rem;
    color: rgba(241, 250, 238, 0.6);
}

.mv-tiaose-styles-title {
    font-family: var(--mv-font-heading);
    font-size: 1.1rem;
    color: var(--mv-accent);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.mv-tiaose-style-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.mv-tiaose-style-btn {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(69, 123, 157, 0.15);
    border: 1px solid rgba(168, 218, 220, 0.1);
    border-radius: var(--mv-radius);
    color: var(--mv-accent);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--mv-transition);
    text-align: left;
    font-family: var(--mv-font-body);
}

.mv-tiaose-style-btn:hover,
.mv-tiaose-style-btn.mv-active {
    background: rgba(230, 57, 70, 0.2);
    border-color: var(--mv-primary);
}

.mv-tiaose-style-name {
    font-family: var(--mv-font-heading);
    font-size: 1rem;
    display: block;
    margin-bottom: 0.2rem;
}

.mv-tiaose-style-desc {
    font-size: 0.75rem;
    color: rgba(241, 250, 238, 0.5);
}

.mv-tiaose-preview {
    background: rgba(13, 27, 42, 0.5);
    border: 1px solid rgba(168, 218, 220, 0.12);
    border-radius: var(--mv-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.mv-tiaose-preview-placeholder {
    text-align: center;
    color: rgba(241, 250, 238, 0.4);
    padding: 2rem;
}

.mv-tiaose-preview-placeholder .mv-icon-large {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.mv-tiaose-preview-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: none;
}

.mv-tiaose-slider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 3px;
    height: 100%;
    background: var(--mv-primary);
    cursor: ew-resize;
    display: none;
    z-index: 10;
}

.mv-tiaose-slider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    background: var(--mv-primary);
    border-radius: 50%;
    border: 2px solid var(--mv-accent);
}

.mv-tiaose-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: center;
}

/* --- APP Download Page --- */
.mv-app-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.mv-app-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    filter: saturate(1.3);
}

.mv-app-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(13,27,42,0.6) 0%, rgba(13,27,42,0.95) 100%);
}

.mv-app-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 2rem;
    max-width: 700px;
}

.mv-app-title {
    font-family: var(--mv-font-heading);
    font-size: 3rem;
    color: var(--mv-accent);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.mv-app-subtitle {
    font-size: 1.1rem;
    color: rgba(241, 250, 238, 0.75);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.mv-qr-wrap {
    width: 200px;
    height: 200px;
    margin: 0 auto 2rem;
    background: var(--mv-accent);
    border-radius: 12px;
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mv-qr-code {
    width: 100%;
    height: 100%;
}

.mv-store-badges {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.mv-store-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(241, 250, 238, 0.1);
    border: 1px solid rgba(241, 250, 238, 0.2);
    border-radius: var(--mv-radius);
    color: var(--mv-accent);
    font-size: 0.9rem;
    transition: all var(--mv-transition);
}

.mv-store-badge:hover {
    background: rgba(241, 250, 238, 0.2);
    color: var(--mv-accent);
}

/* --- Responsive Design --- */

/* 1440px */
@media (max-width: 1440px) {
    .mv-section {
        max-width: 1200px;
    }
}

/* 1024px */
@media (max-width: 1024px) {
    .mv-polaroid-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .mv-gear-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .mv-fame-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .mv-video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .mv-bts-card {
        grid-template-columns: 1fr;
    }
    .mv-academy-card {
        grid-template-columns: 1fr;
    }
    .mv-tiaose-container {
        grid-template-columns: 1fr;
    }
    .mv-hero-slogan {
        font-size: 3rem;
    }
}

/* 768px */
@media (max-width: 768px) {
    .mv-nav-links {
        display: none;
    }
    .mv-hamburger {
        display: flex;
    }
    .mv-hero-slogan {
        font-size: 2.2rem;
    }
    .mv-section {
        padding: 3rem 1.5rem;
    }
    .mv-section-title {
        font-size: 2rem;
    }
    .mv-polaroid-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    .mv-color-lab {
        grid-template-columns: 1fr;
    }
    .mv-gear-grid {
        grid-template-columns: 1fr;
    }
    .mv-dict-grid {
        grid-template-columns: 1fr;
    }
    .mv-challenge-wrap {
        grid-template-columns: 1fr;
    }
    .mv-collab-list {
        grid-template-columns: 1fr;
    }
    .mv-fame-grid {
        grid-template-columns: 1fr;
    }
    .mv-video-grid {
        grid-template-columns: 1fr;
    }
    .mv-footer-inner {
        grid-template-columns: 1fr;
    }
    .mv-page-banner-title {
        font-size: 2rem;
    }
}

/* 360px */
@media (max-width: 360px) {
    html {
        font-size: 14px;
    }
    .mv-hero-slogan {
        font-size: 1.8rem;
    }
    .mv-nav-inner {
        padding: 0.5rem 1rem;
    }
    .mv-section {
        padding: 2rem 1rem;
    }
    .mv-btn-primary,
    .mv-btn-secondary {
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
    }
}