/* ========================================
   王者霸业 - 传奇手游响应式网站
   主样式表
   ======================================== */

/* CSS 变量 */
:root {
    --primary: #e63946;
    --primary-dark: #c1121f;
    --gold: #f4a261;
    --gold-light: #f7cd7d;
    --dark: #0a0a0a;
    --dark-2: #141414;
    --dark-3: #1a1a2e;
    --dark-4: #16213e;
    --text: #e0e0e0;
    --text-muted: #999;
    --white: #ffffff;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gold-light);
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

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

.nav-menu a {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--white);
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}

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

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

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    z-index: 1001;
    transition: var(--transition);
}

.nav-toggle.active {
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--text);
    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);
}

/* ========================================
   主横幅 Hero
   ======================================== */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    max-height: 900px;
    background: var(--dark);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(10, 10, 10, 0.4) 0%,
        rgba(10, 10, 10, 0.6) 40%,
        rgba(10, 10, 10, 0.85) 80%,
        var(--dark) 100%
    );
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content {
    padding: 20px;
    animation: fadeInUp 1s ease;
}

.hero-icon img {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    margin: 0 auto 20px;
    box-shadow: 0 8px 40px rgba(244, 162, 97, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--gold-light);
    text-shadow: 0 0 40px rgba(244, 162, 97, 0.5), 0 4px 8px rgba(0, 0, 0, 0.5);
    margin-bottom: 12px;
    letter-spacing: 4px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: 6px;
}

.hero-tags {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.hero-tags span {
    padding: 6px 20px;
    border: 1px solid rgba(244, 162, 97, 0.4);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--gold-light);
    background: rgba(244, 162, 97, 0.1);
}

.hero-launch {
    font-size: 1.1rem;
    color: var(--gold);
    margin-bottom: 30px;
    letter-spacing: 2px;
    animation: pulse 2s infinite;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 20px rgba(230, 57, 70, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(230, 57, 70, 0.6);
}

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

.btn-outline:hover {
    background: rgba(244, 162, 97, 0.1);
    transform: translateY(-2px);
}

/* 二维码弹出层 */
.btn-qr-wrapper {
    position: relative;
    display: inline-block;
}

.qr-popup {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 1100;
    pointer-events: none;
}

.btn-qr-wrapper:hover .qr-popup {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.qr-popup-inner {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    width: 150px;
}

.qr-popup-inner canvas,
.qr-popup-inner img {
    display: block;
    margin: 0 auto;
    border-radius: 4px;
}

.qr-popup-inner p {
    margin-top: 8px;
    font-size: 0.8rem;
    color: #333;
    font-weight: 500;
}

/* 下载区二维码 */
.download-qr {
    text-align: center;
    margin-bottom: 20px;
}

.download-qr #downloadQrcode {
    display: inline-block;
    background: var(--white);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 10px;
}

.download-qr #downloadQrcode canvas,
.download-qr #downloadQrcode img {
    display: block;
    border-radius: 4px;
}

.download-qr p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========================================
   倒计时
   ======================================== */
.countdown-section {
    padding: 60px 0;
    background: var(--dark-2);
    position: relative;
}

.countdown-section::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.countdown-box {
    text-align: center;
}

.countdown-box h2 {
    font-size: 1.4rem;
    color: var(--gold-light);
    letter-spacing: 8px;
    margin-bottom: 30px;
    font-weight: 500;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--dark-3);
    border: 1px solid rgba(244, 162, 97, 0.2);
    border-radius: var(--radius);
    padding: 20px 24px;
    min-width: 90px;
}

.countdown-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--gold-light);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.countdown-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.countdown-sep {
    font-size: 2rem;
    color: var(--gold);
    font-weight: 700;
}

/* ========================================
   通用区块标题
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--gold-light);
    letter-spacing: 8px;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    border-radius: 2px;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: 16px;
}

/* ========================================
   职业介绍
   ======================================== */
.classes-section {
    padding: 80px 0;
    background: var(--dark);
}

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

.class-card {
    background: var(--dark-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.class-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0;
    transition: var(--transition);
}

.class-card:hover {
    transform: translateY(-8px);
    border-color: rgba(244, 162, 97, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

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

.class-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

.class-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 6px;
}

.class-role {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.class-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 20px;
}

.class-awaken {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.class-awaken span {
    padding: 4px 14px;
    background: rgba(244, 162, 97, 0.1);
    border: 1px solid rgba(244, 162, 97, 0.2);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--gold);
}

/* ========================================
   游戏特色
   ======================================== */
.features-section {
    padding: 80px 0;
    background: var(--dark-2);
}

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

.feature-card {
    background: var(--dark-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: rgba(244, 162, 97, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================
   游戏风采展示
   ======================================== */
.showcase-section {
    padding: 80px 0;
    background: var(--dark);
}

.showcase-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.showcase-scroll::-webkit-scrollbar {
    display: none;
}

.showcase-grid {
    display: flex;
    gap: 16px;
}

.showcase-item {
    flex: 1;
    min-width: 0;
    aspect-ratio: 9 / 16;
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

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

.showcase-item:hover img {
    transform: scale(1.05);
}

/* ========================================
   精彩截图
   ======================================== */
.gallery-section {
    padding: 80px 0;
    background: var(--dark-2);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

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

.gallery-item::after {
    content: '🔍 点击查看大图';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--white);
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover::after {
    opacity: 1;
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

/* ========================================
   上线福利
   ======================================== */
.gifts-section {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-3) 100%);
}

.gifts-content {
    max-width: 800px;
    margin: 0 auto;
}

.gift-highlight {
    text-align: center;
    margin-bottom: 40px;
}

.gift-rate {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 30px 50px;
    background: linear-gradient(135deg, var(--dark-4), var(--dark-3));
    border: 2px solid rgba(244, 162, 97, 0.3);
    border-radius: var(--radius-lg);
}

.rate-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 4px;
}

.rate-value {
    font-size: 1.2rem;
    color: var(--text);
}

.rate-value span {
    margin: 0 8px;
    color: var(--text-muted);
}

.rate-value strong {
    font-size: 2rem;
    color: var(--gold-light);
    font-weight: 900;
}

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

.gift-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.gift-item:hover {
    background: rgba(244, 162, 97, 0.05);
    border-color: rgba(244, 162, 97, 0.2);
    transform: translateX(4px);
}

.gift-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.gift-info h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gold-light);
    margin-bottom: 4px;
}

.gift-info p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ========================================
   宣传视频
   ======================================== */
.video-section {
    padding: 80px 0;
    background: var(--dark);
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.video-wrapper video {
    width: 100%;
    display: block;
}

/* ========================================
   下载区域
   ======================================== */
.download-section {
    padding: 80px 0;
    background: var(--dark-2);
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(244, 162, 97, 0.05) 0%, transparent 70%);
}

.download-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.download-icon img {
    width: 90px;
    height: 90px;
    border-radius: 20px;
    margin: 0 auto 20px;
    box-shadow: 0 8px 30px rgba(244, 162, 97, 0.25);
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--gold-light);
    letter-spacing: 6px;
    margin-bottom: 8px;
}

.download-subtitle {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 8px;
}

.download-date {
    font-size: 1rem;
    color: var(--gold);
    margin-bottom: 36px;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    transition: var(--transition);
    min-width: 200px;
    justify-content: center;
}

.btn-ios {
    background: linear-gradient(135deg, #333, #000);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ios:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.btn-android {
    background: linear-gradient(135deg, #a4c639, #8bc34a);
    color: var(--white);
}

.btn-android:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(164, 198, 57, 0.4);
}

.btn-icon {
    font-size: 1.3rem;
}

.download-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}


/* ========================================
   友情链接
   ======================================== */
.links-section {
    padding: 40px 0;
    background: var(--dark-2);
    border-top: 1px solid var(--border);
}

.links-title {
    text-align: center;
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 24px;
    max-width: 900px;
    margin: 0 auto;
}

.link-item {
    font-size: 0.85rem;
    color: #888;
    transition: var(--transition);
    position: relative;
}

.link-item:hover {
    color: var(--gold-light);
}

.link-item::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: var(--transition);
}

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

@media (max-width: 768px) {
    .links-grid {
        gap: 8px 16px;
    }

    .link-item {
        font-size: 0.8rem;
    }
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 40px 0;
    background: var(--dark-3);
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.footer-logo span {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gold-light);
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-copy {
    color: #666;
    font-size: 0.8rem;
}

/* ========================================
   返回顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(230, 57, 70, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ========================================
   图片预览模态框
   ======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.modal.show {
    display: flex;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 300;
    cursor: pointer;
    z-index: 2001;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--primary);
}

.modal-content {
    max-width: 90%;
    max-height: 85vh;
    border-radius: var(--radius);
    object-fit: contain;
    animation: zoomIn 0.3s ease;
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========================================
   滚动动画
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   响应式设计
   ======================================== */

/* 平板设备 (≤1024px) */
@media (max-width: 1024px) {
    .classes-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .gifts-list {
        grid-template-columns: 1fr 1fr;
    }

    .hero-title {
        font-size: 2.8rem;
    }
}

/* 小屏平板 (≤768px) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        padding: 100px 30px 40px;
        gap: 24px;
        transition: var(--transition);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

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

    .nav-menu a {
        font-size: 1.1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        height: 80vh;
        min-height: 500px;
    }

    .hero-title {
        font-size: 2.2rem;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 1rem;
        letter-spacing: 3px;
    }

    .hero-icon img {
        width: 70px;
        height: 70px;
        border-radius: 16px;
    }

    .section-title {
        font-size: 1.6rem;
        letter-spacing: 4px;
    }

    .classes-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .showcase-grid {
        min-width: max-content;
    }

    .showcase-item {
        flex: none;
        width: 180px;
        aspect-ratio: 9 / 16;
    }

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

    .gifts-list {
        grid-template-columns: 1fr;
    }

    .countdown-item {
        min-width: 65px;
        padding: 14px 16px;
    }

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

    .download-content h2 {
        font-size: 1.8rem;
    }

    .btn-download {
        min-width: 160px;
        padding: 14px 28px;
        font-size: 0.95rem;
    }

    .class-card {
        padding: 24px 16px;
    }
}

/* 手机设备 (≤480px) */
@media (max-width: 480px) {
    .nav {
        height: 60px;
    }

    .nav-logo {
        font-size: 1rem;
    }

    .nav-logo img {
        width: 32px;
        height: 32px;
    }

    .hero {
        height: 70vh;
        min-height: 420px;
    }

    .hero-title {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 0.85rem;
        letter-spacing: 2px;
    }

    .hero-tags span {
        font-size: 0.75rem;
        padding: 4px 14px;
    }

    .hero-launch {
        font-size: 0.9rem;
    }

    .hero-icon img {
        width: 56px;
        height: 56px;
        border-radius: 14px;
    }

    .section-title {
        font-size: 1.4rem;
        letter-spacing: 3px;
    }

    .section-desc {
        font-size: 0.85rem;
    }

    .section-header {
        margin-bottom: 40px;
    }

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

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

    .showcase-grid {
        min-width: max-content;
    }

    .showcase-item {
        flex: none;
        width: 150px;
        aspect-ratio: 9 / 16;
    }

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

    .countdown-timer {
        gap: 6px;
    }

    .countdown-item {
        min-width: 55px;
        padding: 12px 10px;
    }

    .countdown-number {
        font-size: 1.4rem;
    }

    .countdown-sep {
        font-size: 1.3rem;
    }

    .countdown-box h2 {
        font-size: 1rem;
        letter-spacing: 4px;
    }

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

    .hero-buttons .btn-qr-wrapper {
        width: 100%;
        max-width: 260px;
    }

    .hero-buttons .btn-qr-wrapper .btn {
        width: 100%;
    }

    .btn {
        width: 100%;
        max-width: 260px;
        text-align: center;
    }

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

    .btn-download {
        width: 100%;
        max-width: 280px;
    }

    .gift-rate {
        padding: 20px 30px;
    }

    .rate-value strong {
        font-size: 1.5rem;
    }

    .download-content h2 {
        font-size: 1.5rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }

    .video-section,
    .classes-section,
    .features-section,
    .showcase-section,
    .gallery-section,
    .gifts-section,
    .download-section {
        padding: 50px 0;
    }
}