/* ============================================
   OTV 官网样式 - Notion 风格
   黑白为主 + 极简文字 + 大量留白
   ============================================ */

/* === 基础变量 === */
:root {
    /* 颜色 */
    --color-bg: #ffffff;
    --color-text: #37352f;
    --color-text-light: #6b6b6b;
    --color-border: #e3e2e0;
    --color-border-dark: #cfcfcf;
    --color-accent: #37352f;
    --color-accent-hover: #1a1a1a;
    --color-success: #0f7b6c;
    --color-error: #e03e3e;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
    
    /* 尺寸 */
    --max-width: 1100px;
    --nav-height: 60px;
    --radius: 4px;
    --radius-lg: 8px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* 过渡 */
    --transition: 0.2s ease;
}

/* === 重置样式 === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 隐藏滚动条但保留滚动功能 */
html {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

    html::-webkit-scrollbar {
        display: none; /* Chrome/Safari */
    }

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* === 导航栏 === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 18px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    color: var(--color-text-light);
    transition: color var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-text);
    transition: width var(--transition);
}

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

/* === 主要内容区 === */
main {
    padding-top: var(--nav-height);
}

.section {
    padding: 80px 24px;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* === 首屏 Hero === */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 24px;
}

.hero-title {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(16px, 2.5vw, 20px);
    color: var(--color-text-light);
    margin-bottom: 48px;
    letter-spacing: 0.5px;
}

.hero-subtitle span {
    margin: 0 12px;
    opacity: 0.4;
}

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


/* === Hero 按钮盒子 === */
.btn-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 5px 20px;
    min-width: 160px;
    border-radius: var(--radius);
    transition: all var(--transition);
    text-align: center;
}

.btn-box-main {
    font-size: 16px;
    font-weight: 600;
}

.btn-box-sub {
    font-size: 12px;
    margin-top: 4px;
    opacity: 0.8;
}

.btn-box-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-box-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-box-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border-dark);
}

.btn-box-secondary:hover {
    border-color: var(--color-text);
    transform: translateY(-1px);
}

/* === 按钮样式 === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border-dark);
}

.btn-secondary:hover {
    border-color: var(--color-text);
    transform: translateY(-1px);
}

.btn-icon {
    margin-right: 8px;
}

/* === 功能特性 === */
.features {
    background: #fafafa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--color-bg);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--color-border-dark);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    font-size: 28px;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* === 定价区 === */
.pricing {
    text-align: center;
}

.pricing-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 700px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: left;
    transition: all var(--transition);
    position: relative;
}

.pricing-card:hover {
    border-color: var(--color-text);
    box-shadow: var(--shadow-md);
}

.pricing-card.featured {
    border-color: var(--color-text);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--color-text);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: var(--radius);
}

.pricing-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 4px;
}

.pricing-price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-light);
}

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

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    font-size: 14px;
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 600;
}

.pricing-btn {
    width: 100%;
}

/* === 产品截图展示 === */
.screenshots {
    text-align: center;
}

.screenshots-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.screenshots-subtitle {
    font-size: 16px;
    color: var(--color-text-light);
    margin-bottom: 48px;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.screenshot-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.screenshot-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.screenshot-item img {
    width: 100%;
    display: block;
}

.screenshot-caption {
    padding: 16px;
    font-size: 14px;
    color: var(--color-text-light);
    background: #fafafa;
}

/* === 页脚 === */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 24px;
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-link {
    font-size: 14px;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.footer-link:hover {
    color: var(--color-text);
}

.footer-copyright {
    font-size: 13px;
    color: var(--color-text-light);
}

.footer-copyright a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.footer-copyright a:hover {
    color: var(--color-text);
}

/* === 购买弹层 === */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 420px;
    width: 90%;
    transform: translateY(20px);
    transition: transform var(--transition);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--color-text-light);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.modal-close:hover {
    background: #f0f0f0;
    color: var(--color-text);
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

.modal-product {
    background: #fafafa;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-product-name {
    font-weight: 500;
}

.modal-product-price {
    font-size: 18px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color var(--transition);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-text);
}

.form-input::placeholder {
    color: #aaa;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 6px;
}

.form-error {
    color: var(--color-error);
}

/* === 验证页面 === */
.verify-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.verify-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.verify-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.verify-desc {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 40px;
    line-height: 1.7;
}

.upload-area {
    width: 100%;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    transition: all var(--transition);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--color-text);
    background: #fafafa;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.upload-text {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 13px;
    color: #aaa;
}

.upload-input {
    display: none;
}

/* 验证结果 */
.verify-result {
    width: 100%;
    text-align: left;
    display: none;
}

.verify-result.active {
    display: block;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.result-header.success {
    background: #e6f7f4;
    color: var(--color-success);
}

.result-header.error {
    background: #fde8e8;
    color: var(--color-error);
}

.result-icon {
    font-size: 24px;
}

.result-text {
    font-weight: 500;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fafafa;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-light);
}

.result-table {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.result-table-header {
    display: grid;
    grid-template-columns: 100px 80px 100px 1fr;
    background: #fafafa;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-light);
}

.result-table-header > div {
    padding: 12px 16px;
}

.result-table-body {
    max-height: 400px;
    overflow-y: auto;
}

.result-table-row {
    display: grid;
    grid-template-columns: 100px 80px 100px 1fr;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
}

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

.result-table-row > div {
    padding: 12px 16px;
}

.result-table-row:hover {
    background: #fafafa;
}

/* === 支付成功页 === */
.success-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #e6f7f4;
    color: var(--color-success);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    margin-bottom: 24px;
}

.success-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.success-desc {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 32px;
}

.license-box {
    background: #fafafa;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px 32px;
    margin-bottom: 24px;
}

.license-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.license-key {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
    word-break: break-all;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.copy-btn:hover {
    border-color: var(--color-text);
}

.copy-btn.copied {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.success-steps {
    text-align: left;
    max-width: 400px;
    margin: 0 auto 32px;
}

.success-steps h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.success-steps ol {
    padding-left: 20px;
}

.success-steps li {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 8px;
    line-height: 1.6;
}

/* === 响应式 === */
@media (max-width: 768px) {
    .nav-links {
        gap: 20px;
    }
    
    .hero {
        padding: 40px 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
    }
    
    .btn {
        width: 100%;
    }
    
    .section {
        padding: 60px 20px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .result-stats {
        grid-template-columns: 1fr;
    }
    
    .result-table-header,
    .result-table-row {
        grid-template-columns: 90px 70px 80px 1fr;
        font-size: 12px;
    }
    
    .result-table-header > div,
    .result-table-row > div {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    .nav-logo span {
        display: none;
    }
    
    .hero-subtitle span {
        display: none;
    }
    
    .hero-subtitle {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
}

/* === 加载动画 === */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-text);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === 淡入动画 === */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ========================================
   弹幕墙背景效果 - 追加到 style.css 末尾
   ======================================== */

.marquee-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none; /* 不阻挡点击 */
    z-index: 0; /* 确保在内容下方 */
}

.hero {
    position: relative; /* 确保层级关系正确 */
}

    .hero > *:not(.marquee-background) {
        position: relative;
        z-index: 1; /* 内容在弹幕上方 */
    }

/* 每一行弹幕 */
.marquee-row {
    display: flex;
    gap: 40px;
    margin-bottom: 24px;
    white-space: nowrap;
    animation: marquee-scroll linear infinite;
}

/* 滚动动画 */
@keyframes marquee-scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* 弹幕消息气泡 */
.marquee-item {
    display: inline-flex;
    align-items: center;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    font-size: 14px;
    color: #333;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    white-space: nowrap;
}

/* 径向遮罩 - 中心区域变暗 */
.marquee-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient( 
        ellipse 700px 450px at center,    /* 👈 扩大遮罩范围 */
        rgba(255, 255, 255, 0.99) 0%,    /* 👈 中心更不透明 */
        rgba(255, 255, 255, 0.85) 40%,    /* 👈 过渡更平滑 */
        rgba(255, 255, 255, 0.5) 70%,    /* 👈 增强遮罩强度 */
        rgba(255, 255, 255, 0) 100% 
    );
    pointer-events: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .marquee-item {
        font-size: 13px;
        padding: 10px 16px;
    }

    .marquee-row {
        gap: 24px;
        margin-bottom: 16px;
    }

    /* 移动端调整遮罩范围 */
    .marquee-background::after {
        background: radial-gradient( ellipse 300px 250px at center, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.7) 40%, rgba(255, 255, 255, 0.3) 70%, rgba(255, 255, 255, 0) 100% );
    }
}