/* ========================================
   问鼎游戏 — 波普像素主义设计系统
   风格：波普像素主义 (Pop Pixelism)
   色彩：朱红 × 亮蓝 × 明黄 × 珊瑚 × 薄荷
   背景：暖白基底 + 彩色像素装饰
   ======================================== */

/* ----- 基础重置 & 变量 ----- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 波普像素主义色彩系统 */
    --clr-primary: #FF3D00;
    --clr-secondary: #00B4D8;
    --clr-accent: #FFD600;
    --clr-coral: #FF6B6B;
    --clr-mint: #4ECDC4;
    --clr-lavender: #C9B1FF;
    --clr-peach: #FFB088;
    --clr-bg: #FFFAF5;
    --clr-bg-alt: #F0F6FF;
    --clr-card: #FFFFFF;
    --clr-text: #1A1A2E;
    --clr-text-light: #6C6C8A;
    --clr-border: #E8E0D8;

    /* 像素尺寸 */
    --pixel-sm: 4px;
    --pixel-md: 8px;
    --pixel-lg: 16px;

    /* 阴影 */
    --shadow-pixel: 4px 4px 0 rgba(26, 26, 46, 0.08);
    --shadow-pixel-hover: 6px 6px 0 rgba(26, 26, 46, 0.12);
    --shadow-card: 0 2px 12px rgba(26, 26, 46, 0.06);

    /* 圆角 — 像素风格用微圆角或直角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;

    /* 字体 */
    --font-display: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    --font-body: 'Microsoft YaHei', 'PingFang SC', system-ui, sans-serif;
}

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

/* ----- 像素装饰背景（全局微纹理） ----- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image:
        radial-gradient(circle at 20% 50%, var(--clr-accent) 0.5px, transparent 0.5px),
        radial-gradient(circle at 80% 30%, var(--clr-coral) 0.5px, transparent 0.5px),
        radial-gradient(circle at 50% 80%, var(--clr-mint) 0.5px, transparent 0.5px),
        radial-gradient(circle at 10% 90%, var(--clr-secondary) 0.5px, transparent 0.5px);
    background-size: 40px 40px, 60px 60px, 50px 50px, 70px 70px;
    opacity: 0.15;
}

/* ----- 容器 & 区块 ----- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    padding: 80px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--clr-bg-alt);
}

/* 每个区块顶部彩色像素装饰线 */
.section::before {
    content: '';
    display: block;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--clr-primary) 0px,
        var(--clr-primary) 20px,
        var(--clr-accent) 20px,
        var(--clr-accent) 40px,
        var(--clr-secondary) 40px,
        var(--clr-secondary) 60px,
        var(--clr-coral) 60px,
        var(--clr-coral) 80px,
        var(--clr-mint) 80px,
        var(--clr-mint) 100px
    );
    width: 100%;
    max-width: 200px;
    margin: 0 auto 40px;
    border-radius: 2px;
}

.section:first-child::before {
    display: none;
}

/* ----- 站点头部 / 导航 ----- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 250, 245, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 3px solid var(--clr-primary);
    box-shadow: var(--shadow-pixel);
}

/* 导航底部彩色像素条 */
.site-header::after {
    content: '';
    display: block;
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        var(--clr-accent) 0px,
        var(--clr-accent) 15px,
        var(--clr-secondary) 15px,
        var(--clr-secondary) 30px,
        var(--clr-coral) 30px,
        var(--clr-coral) 45px,
        var(--clr-mint) 45px,
        var(--clr-mint) 60px
    );
    position: absolute;
    bottom: -7px;
    left: 0;
    width: 100%;
    height: 4px;
    opacity: 0.6;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    font-size: 1.3rem;
    text-decoration: none;
    color: var(--clr-text);
    letter-spacing: -0.5px;
    position: relative;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral));
    color: #fff;
    box-shadow: 3px 3px 0 rgba(255, 61, 0, 0.3);
    transform: rotate(-2deg);
}

/* Logo 文字 "问鼎" 特殊样式 */
.logo span:last-child {
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-text);
    transition: 0.2s;
    position: relative;
    padding: 4px 0;
    letter-spacing: 0.3px;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--clr-primary);
    transition: 0.25s;
    border-radius: 2px;
}

.main-nav a:hover {
    color: var(--clr-primary);
}

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

.nav-cta {
    padding: 10px 24px !important;
    border-radius: var(--radius-sm) !important;
    color: #fff !important;
    font-weight: 700 !important;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral));
    box-shadow: 3px 3px 0 rgba(255, 61, 0, 0.25);
    transition: 0.2s !important;
    border: none !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0 rgba(255, 61, 0, 0.3) !important;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--clr-text);
    background: none;
    border: 2px solid var(--clr-text);
    border-radius: var(--radius-sm);
    transition: 0.2s;
}

.menu-toggle:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

/* ----- Hero 区域 ----- */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--clr-accent) 0%, transparent 70%);
    opacity: 0.15;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: -60px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, var(--clr-secondary) 0%, transparent 70%);
    opacity: 0.1;
    pointer-events: none;
}

.hero-content {
    max-width: 720px;
    position: relative;
    z-index: 2;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    background: var(--clr-accent);
    color: var(--clr-text);
    letter-spacing: 2px;
    text-transform: uppercase;
    box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.1);
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.15;
    margin-bottom: 20px;
    font-weight: 900;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--clr-text) 40%, var(--clr-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.7;
    max-width: 560px;
    margin-bottom: 36px;
    color: var(--clr-text-light);
    line-height: 1.7;
}

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

.hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    border: 4px solid var(--clr-card);
    box-shadow: 8px 8px 0 rgba(255, 61, 0, 0.15);
    transform: rotate(1deg);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ----- 按钮系统 ----- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: 0.2s;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    position: relative;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral));
    box-shadow: 4px 4px 0 rgba(255, 61, 0, 0.25);
}

.btn-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(255, 61, 0, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2.5px solid var(--clr-text);
    color: var(--clr-text);
    box-shadow: 4px 4px 0 rgba(26, 26, 46, 0.06);
}

.btn-outline:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
    box-shadow: 4px 4px 0 rgba(255, 61, 0, 0.15);
    transform: translate(-1px, -1px);
}

/* 按钮里的箭头/图标 */
.btn .arrow {
    display: inline-block;
    transition: 0.2s;
}

.btn:hover .arrow {
    transform: translateX(4px);
}

/* ----- 区块标签 / 标题 ----- */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 14px;
    text-transform: uppercase;
    color: var(--clr-primary);
    background: rgba(255, 61, 0, 0.08);
    padding: 4px 16px;
    border-radius: var(--radius-sm);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: var(--clr-text);
}

.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 44px;
    color: var(--clr-text-light);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* ----- 卡片网格 ----- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 28px;
}

.category-card {
    border-radius: var(--radius-md);
    padding: 32px 28px;
    border: 2px solid var(--clr-border);
    background: var(--clr-card);
    transition: 0.25s;
    position: relative;
    box-shadow: var(--shadow-card);
}

.category-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 4px;
    background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent), var(--clr-secondary));
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    opacity: 0;
    transition: 0.3s;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 6px 6px 0 rgba(255, 61, 0, 0.12);
    border-color: var(--clr-primary);
}

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

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--clr-accent), var(--clr-peach));
    color: var(--clr-text);
    box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.06);
}

.category-card:nth-child(2) .card-icon {
    background: linear-gradient(135deg, var(--clr-secondary), var(--clr-mint));
    color: #fff;
}

.category-card:nth-child(3) .card-icon {
    background: linear-gradient(135deg, var(--clr-coral), var(--clr-primary));
    color: #fff;
}

.category-card:nth-child(4) .card-icon {
    background: linear-gradient(135deg, var(--clr-lavender), var(--clr-secondary));
    color: #fff;
}

.category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 0.9rem;
    color: var(--clr-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-link {
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--clr-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: 0.2s;
}

.card-link:hover {
    gap: 10px;
    color: var(--clr-coral);
}

/* ----- 特性块 （左右布局） ----- */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.feature-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 4px solid var(--clr-card);
    box-shadow: 8px 8px 0 rgba(0, 180, 216, 0.15);
    transform: rotate(-1deg);
    transition: 0.3s;
}

.feature-block:nth-child(even) .feature-image {
    transform: rotate(1deg);
    box-shadow: 8px 8px 0 rgba(255, 61, 0, 0.15);
}

.feature-image:hover {
    transform: rotate(0deg) scale(1.01);
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-text {
    padding: 8px 0;
}

.feature-text h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.2;
}

.feature-text p {
    color: var(--clr-text-light);
    margin-bottom: 20px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    border-bottom: 1px dashed var(--clr-border);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '✦';
    font-weight: 700;
    color: var(--clr-primary);
    font-size: 1.1rem;
}

.feature-block:nth-child(even) .feature-list li::before {
    color: var(--clr-secondary);
}

/* ----- 数据条 ----- */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    text-align: center;
}

.stat-item {
    padding: 32px 20px;
    border-radius: var(--radius-md);
    border: 2px solid var(--clr-border);
    background: var(--clr-card);
    transition: 0.25s;
    position: relative;
    box-shadow: var(--shadow-card);
}

.stat-item:hover {
    transform: translateY(-3px);
    box-shadow: 6px 6px 0 rgba(255, 61, 0, 0.1);
    border-color: var(--clr-accent);
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 20%;
    right: 20%;
    height: 4px;
    background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
    border-radius: 2px;
    opacity: 0.3;
}

.stat-number {
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item:nth-child(2) .stat-number {
    background: linear-gradient(135deg, var(--clr-secondary), var(--clr-mint));
    -webkit-background-clip: text;
    background-clip: text;
}

.stat-item:nth-child(3) .stat-number {
    background: linear-gradient(135deg, var(--clr-accent), var(--clr-coral));
    -webkit-background-clip: text;
    background-clip: text;
}

.stat-item:nth-child(4) .stat-number {
    background: linear-gradient(135deg, var(--clr-lavender), var(--clr-secondary));
    -webkit-background-clip: text;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 8px;
    font-weight: 500;
    color: var(--clr-text-light);
}

/* ----- 内容墙 ----- */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--clr-border);
    background: var(--clr-card);
    transition: 0.25s;
    box-shadow: var(--shadow-card);
}

.content-wall-item:hover {
    transform: translateY(-4px);
    box-shadow: 6px 6px 0 rgba(0, 180, 216, 0.12);
    border-color: var(--clr-secondary);
}

.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    border-bottom: 3px solid var(--clr-accent);
}

.content-wall-item:nth-child(2) img {
    border-bottom-color: var(--clr-secondary);
}

.content-wall-item:nth-child(3) img {
    border-bottom-color: var(--clr-coral);
}

.content-wall-body {
    padding: 22px 20px 24px;
}

.content-wall-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.content-wall-body p {
    font-size: 0.88rem;
    color: var(--clr-text-light);
    line-height: 1.6;
    margin-bottom: 12px;
}

.content-wall-body .meta {
    font-size: 0.78rem;
    color: var(--clr-text-light);
    opacity: 0.6;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ----- FAQ ----- */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 2px solid var(--clr-border);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: var(--clr-card);
    transition: 0.2s;
    box-shadow: var(--shadow-card);
}

.faq-item:hover {
    border-color: var(--clr-primary);
}

.faq-item .faq-question {
    padding: 18px 22px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    color: var(--clr-text);
    transition: 0.2s;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--clr-primary);
    transition: 0.3s;
}

.faq-item.open .faq-question::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-item .faq-answer {
    padding: 0 22px 20px;
    display: none;
    opacity: 0.7;
    color: var(--clr-text-light);
    line-height: 1.7;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-item.open {
    border-color: var(--clr-primary);
    box-shadow: 4px 4px 0 rgba(255, 61, 0, 0.08);
}

/* ----- CTA 横幅 ----- */
.cta-banner {
    padding: 60px 32px;
    text-align: center;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-coral), var(--clr-secondary));
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: 8px 8px 0 rgba(255, 61, 0, 0.15);
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(255, 255, 255, 0.05) 20px,
        rgba(255, 255, 255, 0.05) 40px
    );
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 500px;
    margin: 0 auto 28px;
    font-size: 1.05rem;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary {
    background: #fff;
    color: var(--clr-primary);
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.2);
    transform: translate(-2px, -2px);
}

/* ----- 页脚 ----- */
.site-footer {
    padding: 64px 0 28px;
    background: var(--clr-text);
    color: rgba(255, 255, 255, 0.8);
    position: relative;
}

.site-footer::before {
    content: '';
    display: block;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--clr-primary) 0px,
        var(--clr-primary) 25px,
        var(--clr-accent) 25px,
        var(--clr-accent) 50px,
        var(--clr-secondary) 50px,
        var(--clr-secondary) 75px,
        var(--clr-mint) 75px,
        var(--clr-mint) 100px
    );
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand {
    max-width: 320px;
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 14px;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, var(--clr-accent), var(--clr-coral));
    color: var(--clr-text);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-col h5 {
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    font-size: 0.88rem;
    transition: 0.2s;
}

.footer-col ul a:hover {
    color: var(--clr-accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 44px;
    padding-top: 22px;
    text-align: center;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.35);
}

/* ----- 工具类 ----- */
.text-accent {
    color: var(--clr-primary);
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.7;
    color: var(--clr-text-light);
    line-height: 1.7;
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

/* 像素装饰块（可复用的彩色方块） */
.pixel-dots {
    display: flex;
    gap: 6px;
    margin-top: 12px;
}

.pixel-dots span {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    display: block;
}

.pixel-dots span:nth-child(1) { background: var(--clr-primary); }
.pixel-dots span:nth-child(2) { background: var(--clr-accent); }
.pixel-dots span:nth-child(3) { background: var(--clr-secondary); }
.pixel-dots span:nth-child(4) { background: var(--clr-coral); }
.pixel-dots span:nth-child(5) { background: var(--clr-mint); }

/* ----- 响应式 ----- */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.6rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .feature-block {
        gap: 40px;
    }

    .stats-bar {
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

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

    .feature-block {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .feature-image {
        order: -1;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }

    .main-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: var(--clr-bg);
        padding: 24px 28px;
        gap: 16px;
        border-bottom: 3px solid var(--clr-primary);
        box-shadow: var(--shadow-pixel);
    }

    .main-nav.open a {
        font-size: 1rem;
        padding: 8px 0;
    }

    .section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .cards-grid {
        gap: 20px;
    }

    .content-wall {
        gap: 20px;
    }

    .cta-banner {
        padding: 40px 20px;
    }

    .cta-banner h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

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

    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .stat-item {
        padding: 24px 16px;
    }

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

    .section-title {
        font-size: 1.4rem;
    }

    .feature-text h3 {
        font-size: 1.3rem;
    }

    .logo {
        font-size: 1.1rem;
    }

    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 1rem;
    }
}

/* ----- 小交互增强 ----- */
::selection {
    background: var(--clr-accent);
    color: var(--clr-text);
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--clr-bg);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--clr-primary), var(--clr-coral));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--clr-coral), var(--clr-primary));
}

/* 链接通用样式 */
a {
    color: inherit;
}

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