:root {
    --cream: #FFF8F0;
    --cream-deep: #F5EBDF;
    --white: #FFFFFF;
    --text: #2D2A32;
    --text-light: rgba(45,42,50,0.65);
    --primary: #FF4A6A;
    --primary-deep: #E63E5C;
    --secondary: #00C2A8;
    --teal-deep: #009B8A;
    --accent: #FFB84D;
    --border: rgba(45,42,50,0.08);
    --card-shadow: 0 4px 24px rgba(255,74,106,0.06);
    --card-shadow-hover: 0 12px 36px rgba(255,74,106,0.12);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: var(--cream);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: var(--primary);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--cream);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 8px;
}

/* ============ 核心布局 ============ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 96px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--cream-deep);
    background-image: radial-gradient(rgba(0, 194, 168, 0.05) 1.5px, transparent 1.5px);
    background-size: 28px 28px;
}

/* ============ 导航 ============ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 248, 240, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header:hover {
    box-shadow: 0 4px 30px rgba(255, 74, 106, 0.07);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    text-decoration: none;
    color: var(--text);
    letter-spacing: -0.5px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 4px 16px rgba(255, 74, 106, 0.3);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    position: relative;
    transition: color 0.25s ease;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2.5px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.nav-cta {
    padding: 10px 24px;
    border-radius: 50px;
    color: #fff !important;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 4px 16px rgba(255, 74, 106, 0.35);
    transition: all 0.3s ease !important;
    position: relative;
    overflow: hidden;
}

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

.nav-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.5s ease;
}

.nav-cta:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 24px rgba(255, 74, 106, 0.45);
}

.nav-cta:hover::before {
    left: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: 0;
    border-radius: 12px;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: rgba(255, 74, 106, 0.08);
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2.5px;
    border-radius: 3px;
    background: var(--text);
    transition: all 0.3s ease;
}

/* ============ Hero 弹幕同频 ============ */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    background:
        radial-gradient(circle at 85% 40%, rgba(255, 74, 106, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 15% 85%, rgba(0, 194, 168, 0.07) 0%, transparent 45%),
        radial-gradient(circle at 50% 20%, rgba(255, 184, 77, 0.06) 0%, transparent 40%),
        var(--cream);
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '哈哈哈哈哈哈 🎉 高能预警！';
    position: absolute;
    top: 25%;
    left: -200px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 2px solid var(--primary);
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(255, 74, 106, 0.15);
    white-space: nowrap;
    animation: danmaku 18s linear infinite;
    z-index: 1;
}

.hero::after {
    content: '前方高能！✨ 弹幕拉满！';
    position: absolute;
    top: 55%;
    right: -200px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 2px solid var(--secondary);
    color: var(--secondary);
    box-shadow: 0 4px 20px rgba(0, 194, 168, 0.15);
    white-space: nowrap;
    animation: danmaku 22s 4s linear infinite;
    z-index: 1;
}

@keyframes danmaku {
    0% {
        transform: translateX(0) rotate(-2deg);
        opacity: 0;
    }
    5% {
        opacity: 1;
    }
    45% {
        transform: translateX(calc(-100vw - 400px)) rotate(2deg);
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        transform: translateX(calc(-100vw - 400px)) rotate(2deg);
        opacity: 0;
    }
}

.hero-content {
    max-width: 720px;
    position: relative;
    z-index: 3;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 7px 20px;
    border-radius: 50px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(255, 74, 106, 0.12), rgba(255, 184, 77, 0.12));
    color: var(--primary);
    border: 1px solid rgba(255, 74, 106, 0.25);
    letter-spacing: 1.5px;
    text-transform: lowercase;
    position: relative;
    transition: transform 0.3s ease;
}

.hero-eyebrow:hover {
    transform: scale(1.03);
}

.hero h1 {
    font-size: 3.6rem;
    line-height: 1.12;
    margin-bottom: 24px;
    font-weight: 800;
    letter-spacing: -2px;
    background: linear-gradient(120deg, var(--text) 20%, var(--primary) 60%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.18rem;
    color: var(--text-light);
    max-width: 540px;
    margin-bottom: 40px;
    line-height: 1.8;
    font-weight: 400;
}

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

.hero-buttons .btn:first-child {
    animation: pulse-cta 2.5s ease-in-out infinite;
}

@keyframes pulse-cta {
    0%, 100% {
        box-shadow: 0 4px 16px rgba(255, 74, 106, 0.3);
    }
    50% {
        box-shadow: 0 4px 28px rgba(255, 74, 106, 0.5);
    }
}

.hero-image {
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, rgba(255, 74, 106, 0.1), rgba(0, 194, 168, 0.1));
    padding: 20px;
    margin-top: 40px;
    display: none;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 4px 18px rgba(255, 74, 106, 0.35);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(255, 74, 106, 0.45);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--text);
    color: var(--text);
    padding: 12px 28px;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(255, 74, 106, 0.1);
    background: rgba(255, 74, 106, 0.04);
}

/* ============ 标签/标题 ============ */
.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 14px;
    color: var(--primary);
    text-transform: lowercase;
    position: relative;
    padding-left: 28px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 20px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.section-title {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
    line-height: 1.2;
    color: var(--text);
}

.section-desc {
    max-width: 620px;
    color: var(--text-light);
    margin-bottom: 48px;
    font-size: 1rem;
    line-height: 1.8;
}

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

.category-card {
    background: var(--white);
    border-radius: 24px;
    padding: 36px 32px;
    border: 1px solid var(--border);
    transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 0 0 4px 4px;
}

.category-card::after {
    content: '';
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 74, 106, 0.06) 0%, transparent 70%);
    transition: transform 0.5s ease;
}

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

.category-card:hover::after {
    transform: scale(2.5);
}

.category-card:hover {
    transform: translateY(-8px) rotate(-0.5deg);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(255, 74, 106, 0.15);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    background: linear-gradient(135deg, rgba(255, 74, 106, 0.1), rgba(255, 184, 77, 0.12));
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-card:hover .card-icon {
    transform: scale(1.15) rotate(-8deg);
}

.card-link {
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    position: relative;
    z-index: 1;
    transition: gap 0.25s ease;
}

.card-link:hover {
    gap: 10px;
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.category-card p {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-bottom: 18px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ============ 特性块 ============ */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: center;
}

.feature-image {
    border-radius: 24px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(0, 194, 168, 0.15), rgba(255, 184, 77, 0.15));
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid var(--border);
}

.feature-image::before {
    content: '🎬';
    font-size: 6rem;
    opacity: 0.6;
    animation: float-element 3.5s ease-in-out infinite;
    filter: drop-shadow(0 8px 16px rgba(255, 74, 106, 0.2));
}

@keyframes float-element {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
    }
    50% {
        transform: translateY(-18px) rotate(5deg) scale(1.05);
    }
}

.feature-image img {
    width: 100%;
    height: auto;
    position: absolute;
    inset: 0;
    object-fit: cover;
    opacity: 0;
    border-radius: 24px;
}

.feature-text {
    position: relative;
}

.feature-text h2 {
    font-size: 2.4rem;
    line-height: 1.2;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.feature-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 1rem;
}

.feature-list {
    list-style: none;
    margin-top: 24px;
}

.feature-list li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.95rem;
    color: var(--text);
    transition: transform 0.2s ease;
}

.feature-list li:hover {
    transform: translateX(4px);
}

.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: rgba(0, 194, 168, 0.12);
    border-radius: 50%;
    font-size: 0.8rem;
    flex-shrink: 0;
    transition: background 0.2s, transform 0.2s;
}

.feature-list li:hover::before {
    background: rgba(0, 194, 168, 0.25);
    transform: scale(1.1);
}

/* ============ 数据条 ============ */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    background: var(--white);
    padding: 36px 24px;
    border-radius: 24px;
    border: 1px solid var(--border);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s;
    position: relative;
    overflow: hidden;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 4px;
    border-radius: 4px 4px 0 0;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--card-shadow-hover);
}

.stat-item:hover::after {
    width: 64px;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.92rem;
    color: var(--text-light);
    margin-top: 10px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

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

.content-wall-item {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.content-wall-item:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(0, 194, 168, 0.2);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: block;
}

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

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

.content-wall-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
}

.content-wall-body p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 12px;
}

.content-wall-body .card-link {
    font-size: 0.82rem;
}

.content-wall-item .tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(255, 74, 106, 0.08), rgba(255, 184, 77, 0.08));
    color: var(--primary);
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

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

.faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 18px;
    margin-bottom: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item:hover {
    border-color: rgba(255, 74, 106, 0.2);
    box-shadow: 0 6px 20px rgba(255, 74, 106, 0.06);
}

.faq-item.open {
    border-color: rgba(255, 74, 106, 0.25);
    box-shadow: 0 8px 24px rgba(255, 74, 106, 0.08);
}

.faq-item .faq-question {
    padding: 20px 28px;
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    position: relative;
    color: var(--text);
    transition: color 0.2s;
}

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

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 74, 106, 0.08);
    flex-shrink: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
}

.faq-item .faq-answer {
    padding: 0 28px 24px;
    display: none;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============ CTA 横幅 ============ */
.cta-banner {
    padding: 72px 48px;
    text-align: center;
    border-radius: 32px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
    background-size: 300% 300%;
    animation: gradient-flow 8s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(255, 74, 106, 0.25);
}

@keyframes gradient-flow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    pointer-events: none;
    animation: float-blob 6s ease-in-out infinite alternate;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: -60px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(0, 194, 168, 0.15);
    pointer-events: none;
    animation: float-blob 8s ease-in-out infinite alternate-reverse;
}

@keyframes float-blob {
    0% {
        transform: translateY(0) scale(1);
    }
    100% {
        transform: translateY(-20px) scale(1.1);
    }
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 28px;
    font-size: 1.05rem;
    position: relative;
    z-index: 1;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.cta-banner .btn-primary {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transform: translateY(-3px) scale(1.02);
}

/* ============ 页脚 ============ */
.site-footer {
    padding: 72px 0 32px;
    background: var(--cream-deep);
    border-top: 1px solid var(--border);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
    opacity: 0.4;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    padding-right: 24px;
}

.footer-brand .logo {
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.8;
    max-width: 320px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    background: var(--white);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
    position: relative;
    display: inline-block;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 20px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: var(--text-light);
    text-decoration: none;
    padding: 5px 0;
    transition: all 0.2s ease;
    position: relative;
}

.footer-col a:hover {
    color: var(--primary);
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ============ 工具类 ============ */
.text-accent {
    color: var(--primary);
    font-weight: 700;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    color: var(--text-light);
    text-align: center;
    line-height: 1.8;
    font-size: 0.95rem;
}

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

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

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3rem;
    }
    .feature-block {
        gap: 40px;
    }
    .stats-bar {
        gap: 16px;
    }
    .footer-grid {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255, 248, 240, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        box-shadow: 0 16px 40px rgba(45, 42, 50, 0.1);
        border-bottom: 1px solid var(--border);
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav.open {
        display: flex;
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .hero {
        min-height: 70vh;
    }

    .hero h1 {
        font-size: 2.6rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .cta-banner {
        padding: 48px 28px;
        border-radius: 24px;
    }

    .cta-banner h2 {
        font-size: 1.8rem;
    }

    .feature-text h2 {
        font-size: 1.8rem;
    }

    .hero::before,
    .hero::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

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

    .hero h1 {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }

    .hero p {
        font-size: 0.95rem;
    }

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

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .stat-number {
        font-size: 2.2rem;
    }

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

    .cta-banner h2 {
        font-size: 1.5rem;
    }

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

    .category-card {
        padding: 28px 24px;
    }

    .feature-image {
        min-height: 240px;
    }
}