/* ========== 基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #ff6b35;
    --primary-dark: #e55a25;
    --primary-light: #ff8c5e;
    --dark: #0a0a0a;
    --dark2: #111;
    --dark3: #1a1a1a;
    --dark4: #222;
    --text: #e0e0e0;
    --text-muted: #999;
    --gold: #d4a853;
    --gold-light: #f0d080;
    --border: #2a2a2a;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.header.scrolled {
    background: rgba(10,10,10,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo img {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    object-fit: cover;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav a {
    font-size: 15px;
    color: var(--text-muted);
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}

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

.nav a:hover {
    color: #fff;
}

.nav a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

/* ========== 英雄区 ========== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 650px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0,0,0,0.4) 0%,
        rgba(0,0,0,0.6) 40%,
        rgba(0,0,0,0.85) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-icon {
    margin-bottom: 24px;
}

.hero-icon img {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    margin: 0 auto;
    box-shadow: 0 0 40px rgba(255,107,53,0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 800;
    background: linear-gradient(180deg, #fff 30%, var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 12px;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 8px;
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-muted);
    background: rgba(255,255,255,0.06);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.08);
}

.meta-item svg {
    color: var(--primary);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 20px rgba(255,107,53,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,107,53,0.5);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.05);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ========== 首屏下载按钮二维码悬浮 ========== */
.btn-qr-wrapper {
    position: relative;
    display: inline-block;
}

.btn-qr-popup {
    position: absolute;
    bottom: calc(100% + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 100;
    width: 200px;
}

.btn-qr-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: #fff;
}

.btn-qr-wrapper:hover .btn-qr-popup {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.qr-popup-inner {
    text-align: center;
}

.qr-popup-inner canvas,
.qr-popup-inner img {
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}

.qr-popup-inner p {
    margin-top: 12px;
    font-size: 13px;
    color: #666;
    letter-spacing: 1px;
}

/* ========== 下载区域二维码 ========== */
.page-qr-section {
    margin-top: 50px;
    text-align: center;
}

.page-qr-card {
    display: inline-block;
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 48px;
    transition: var(--transition);
}

.page-qr-card:hover {
    border-color: rgba(255,107,53,0.3);
    box-shadow: 0 8px 30px rgba(255,107,53,0.08);
}

.page-qr-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.page-qr-card canvas,
.page-qr-card img {
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    background: #fff;
    padding: 12px;
}

.page-qr-card p {
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-muted);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255,255,255,0.5);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========== 区块标题 ========== */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 16px;
    margin-top: 20px;
}

/* ========== 特色区域 ========== */
.features {
    background: var(--dark2);
}

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

.feature-card {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255,107,53,0.3);
    box-shadow: 0 12px 40px rgba(255,107,53,0.1);
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,107,53,0.08);
    border-radius: 18px;
}

.feature-icon img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ========== 截图区域 ========== */
.gallery {
    background: var(--dark);
}

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

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

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

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

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

/* ========== 展示区域 ========== */
.showcase {
    background: var(--dark2);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.showcase-grid img {
    border-radius: var(--radius);
    aspect-ratio: 3/4;
    object-fit: cover;
    transition: var(--transition);
    cursor: pointer;
}

.showcase-grid img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

/* ========== 福利区域 ========== */
.welfare {
    background: var(--dark);
}

.welfare-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.welfare-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 32px;
    transition: var(--transition);
}

.welfare-card:hover {
    border-color: rgba(255,107,53,0.3);
    transform: translateX(8px);
    box-shadow: 0 8px 30px rgba(255,107,53,0.08);
}

.welfare-number {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 60px;
}

.welfare-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.welfare-content p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ========== 下载区域 ========== */
.download {
    background: linear-gradient(180deg, var(--dark2) 0%, var(--dark) 100%);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
}

.download-card {
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
}

.download-card:hover {
    border-color: rgba(255,107,53,0.3);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(255,107,53,0.1);
}

.download-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 30px rgba(255,107,53,0.3);
}

.download-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.download-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--dark);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.footer-logo span {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* ========== 友情链接 ========== */
.friend-links {
    margin-bottom: 24px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.friend-links h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 14px;
    letter-spacing: 2px;
}

.friend-links-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.friend-links-list a {
    color: var(--text-muted);
    font-size: 13px;
    transition: var(--transition);
    padding: 4px 12px;
    border-radius: 4px;
}

.friend-links-list a:hover {
    color: var(--primary);
    background: rgba(255,107,53,0.08);
}

.copyright {
    color: var(--text-muted);
    font-size: 13px;
    opacity: 0.6;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10,10,10,0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav a {
        padding: 16px 0;
        border-bottom: 1px solid rgba(255,255,255,0.05);
        text-align: center;
        font-size: 16px;
    }

    .nav-toggle {
        display: flex;
    }

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

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

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

    .download-cards {
        grid-template-columns: 1fr;
    }

    .welfare-card {
        padding: 20px 24px;
    }

    section {
        padding: 60px 0;
    }

    .hero-title {
        letter-spacing: 6px;
    }

    .btn-qr-popup {
        display: none;
    }

    .page-qr-card {
        padding: 24px 28px;
    }
}

/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 16px rgba(255,107,53,0.4);
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255,107,53,0.6);
}

/* ========== 动画 ========== */
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,107,53,0.4); }
    50% { box-shadow: 0 0 0 20px rgba(255,107,53,0); }
}

.btn-primary {
    animation: pulse 2s infinite;
}

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

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

/* ========== 图片灯箱 ========== */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

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

.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    background: transparent;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.lightbox-close:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
}