/* ============================================================
   多多28 · 惊喜无限 | 独家视觉设计系统
   概念：数字韵律 · 几何惊喜
   主色：珊瑚橙 #FF6B35 · 碧蓝 #2EC4B6 · 暖杏 #FFF4ED
   ============================================================ */

/* ---- 基础重置 ---- */
*, *::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: #FFF8F2;
    color: #2D3436;
    line-height: 1.6;
}

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

.section {
    padding: 100px 0;
    position: relative;
}

.section:nth-child(even) {
    background: #FFF4ED;
}

/* 独特的几何装饰 — 每个section的伪元素 */
.section::before {
    content: '28';
    position: absolute;
    right: -20px;
    top: 20px;
    font-size: 12rem;
    font-weight: 900;
    color: rgba(255, 107, 53, 0.04);
    line-height: 1;
    pointer-events: none;
    z-index: 0;
    letter-spacing: -8px;
    user-select: none;
}

.section:nth-child(even)::before {
    color: rgba(46, 196, 182, 0.04);
    right: auto;
    left: -20px;
}

/* ---- 导航 ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 248, 242, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(255, 107, 53, 0.10);
    transition: background 0.3s;
}

.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: #2D3436;
    letter-spacing: -0.5px;
    position: relative;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 900;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    color: #fff;
    position: relative;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 15px;
    border: 2px solid rgba(255, 107, 53, 0.15);
}

.logo span:last-child {
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.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: #2D3436;
    transition: all 0.25s;
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2.5px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6);
    border-radius: 4px;
    transition: width 0.3s ease;
}

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

.main-nav a:hover {
    color: #FF6B35;
}

.nav-cta {
    padding: 10px 24px !important;
    border-radius: 50px !important;
    color: #fff !important;
    font-weight: 700 !important;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.25);
    transition: transform 0.25s, box-shadow 0.25s !important;
    position: relative;
    overflow: hidden;
}

.nav-cta::before {
    content: '✨';
    margin-right: 6px;
}

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

.nav-cta:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 28px rgba(255, 107, 53, 0.35) !important;
    color: #fff !important;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border-radius: 8px;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: rgba(255, 107, 53, 0.08);
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2.5px;
    background: #2D3436;
    border-radius: 4px;
    transition: 0.3s;
}

/* ---- Hero ---- */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
    background: linear-gradient(165deg, #FFF8F2 0%, #FFE8D6 40%, #FFF4ED 100%);
}

.hero::before {
    content: '';
    position: absolute;
    right: -10%;
    top: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '28';
    position: absolute;
    right: 5%;
    bottom: 10%;
    font-size: 18rem;
    font-weight: 900;
    color: rgba(46, 196, 182, 0.06);
    line-height: 1;
    letter-spacing: -12px;
    pointer-events: none;
    user-select: none;
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.10), rgba(46, 196, 182, 0.10));
    color: #FF6B35;
    border: 1px solid rgba(255, 107, 53, 0.12);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-eyebrow::before {
    content: '🎉';
    font-size: 0.9rem;
}

.hero h1 {
    font-size: 3.4rem;
    line-height: 1.15;
    margin-bottom: 20px;
    font-weight: 900;
    letter-spacing: -1.5px;
    color: #1A1A2E;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero h1 .highlight-2 {
    color: #2EC4B6;
    -webkit-text-fill-color: #2EC4B6;
}

.hero p {
    font-size: 1.15rem;
    opacity: 0.7;
    max-width: 560px;
    margin-bottom: 36px;
    color: #555;
    line-height: 1.7;
}

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

.hero-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(255, 107, 53, 0.12);
    transform: perspective(1000px) rotateY(-3deg);
    transition: transform 0.5s ease;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.hero-image:hover {
    transform: perspective(1000px) rotateY(0deg);
}

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

/* ---- 按钮 ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(255, 107, 53, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid #FF6B35;
    color: #FF6B35;
}

.btn-outline:hover {
    background: rgba(255, 107, 53, 0.06);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.12);
}

.btn::after {
    content: '→';
    transition: transform 0.3s;
}

.btn-primary::after {
    color: rgba(255, 255, 255, 0.8);
}

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

/* ---- 标签/标题 ---- */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 16px;
    color: #FF6B35;
    text-transform: uppercase;
    position: relative;
}

.section-label::before {
    content: '◆';
    font-size: 0.5rem;
    color: #2EC4B6;
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-weight: 900;
    letter-spacing: -1px;
    color: #1A1A2E;
    line-height: 1.2;
}

.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 48px;
    color: #555;
    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: 20px;
    padding: 32px 28px;
    border: 1px solid rgba(255, 107, 53, 0.08);
    background: #fff;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.category-card:hover::before {
    transform: scaleX(1);
}

.category-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 16px 48px rgba(255, 107, 53, 0.10);
    border-color: rgba(255, 107, 53, 0.15);
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(46, 196, 182, 0.08));
    color: #FF6B35;
    transition: all 0.3s;
}

.category-card:hover .card-icon {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.15), rgba(46, 196, 182, 0.15));
    transform: scale(1.05);
}

.category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1A1A2E;
}

.category-card p {
    font-size: 0.9rem;
    opacity: 0.65;
    margin-bottom: 16px;
    line-height: 1.6;
    color: #555;
}

.card-link {
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: #FF6B35;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s;
}

.card-link::after {
    content: '→';
    transition: transform 0.3s;
}

.card-link:hover::after {
    transform: translateX(4px);
}

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

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

.feature-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(46, 196, 182, 0.10);
    position: relative;
}

.feature-image::after {
    content: '28';
    position: absolute;
    right: 16px;
    bottom: 16px;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.15);
    letter-spacing: -4px;
    pointer-events: none;
}

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

.feature-text h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    color: #1A1A2E;
}

.feature-text p {
    opacity: 0.7;
    line-height: 1.7;
    margin-bottom: 20px;
    color: #555;
}

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

.feature-list li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

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

.feature-list li::before {
    content: '✓';
    font-weight: 800;
    color: #2EC4B6;
    font-size: 1.1rem;
}

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

.stat-item {
    padding: 32px 20px;
    border-radius: 20px;
    border: 1px solid rgba(255, 107, 53, 0.06);
    background: #fff;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, #FF6B35, #2EC4B6);
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.3s, width 0.3s;
}

.stat-item:hover::before {
    opacity: 1;
    width: 60px;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(255, 107, 53, 0.08);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    letter-spacing: -2px;
}

.stat-item:nth-child(even) .stat-number {
    background: linear-gradient(135deg, #2EC4B6, #45D4C0);
    -webkit-background-clip: text;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 8px;
    font-weight: 500;
    color: #555;
}

/* ---- 内容墙 ---- */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 107, 53, 0.06);
    background: #fff;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(255, 107, 53, 0.08);
    border-color: rgba(255, 107, 53, 0.12);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.content-wall-item:hover img {
    transform: scale(1.03);
}

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

.content-wall-body .tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(255, 107, 53, 0.08);
    color: #FF6B35;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
}

.content-wall-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1A1A2E;
    line-height: 1.3;
}

.content-wall-body p {
    font-size: 0.88rem;
    opacity: 0.65;
    line-height: 1.6;
    color: #555;
}

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

.faq-item {
    border: 1px solid rgba(255, 107, 53, 0.06);
    border-radius: 16px;
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(255, 107, 53, 0.12);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.04);
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    color: #1A1A2E;
    user-select: none;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 300;
    color: #FF6B35;
    transition: transform 0.3s ease;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    color: #2EC4B6;
}

.faq-item .faq-answer {
    padding: 0 24px 18px;
    display: none;
    opacity: 0.7;
    line-height: 1.7;
    color: #555;
}

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

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 0.7;
        transform: translateY(0);
    }
}

/* ---- CTA横幅 ---- */
.cta-banner {
    padding: 64px 32px;
    text-align: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #FF6B35, #FF8F65, #FF6B35);
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(255, 107, 53, 0.25);
}

.cta-banner::before {
    content: '28';
    position: absolute;
    right: -20px;
    bottom: -20px;
    font-size: 16rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.06);
    line-height: 1;
    letter-spacing: -12px;
    pointer-events: none;
}

.cta-banner::after {
    content: '✨';
    position: absolute;
    top: 20px;
    right: 40px;
    font-size: 2.5rem;
    opacity: 0.2;
    animation: float 3s ease-in-out infinite;
}

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

.cta-banner h2 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    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: #FF6B35;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.10);
}

.cta-banner .btn-primary::after {
    color: #FF6B35;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

/* ---- 页脚 ---- */
.site-footer {
    padding: 64px 0 32px;
    background: #1A1A2E;
    color: rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '28';
    position: absolute;
    left: -40px;
    top: -40px;
    font-size: 20rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.02);
    letter-spacing: -16px;
    pointer-events: none;
}

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

.footer-brand p {
    opacity: 0.6;
    margin-top: 12px;
    line-height: 1.7;
    max-width: 320px;
    font-size: 0.9rem;
}

.footer-brand .logo {
    color: #fff;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, #FF6B35, #FF8F65);
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}

.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: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul a:hover {
    color: #FF6B35;
}

.footer-col ul a::before {
    content: '›';
    font-weight: 700;
    font-size: 1.1rem;
    opacity: 0.4;
    transition: opacity 0.2s, transform 0.2s;
}

.footer-col ul a:hover::before {
    opacity: 1;
    transform: translateX(2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.82rem;
    opacity: 0.4;
    position: relative;
    z-index: 1;
}

/* ---- 工具类 ---- */
.text-accent {
    color: #FF6B35;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.7;
    color: #555;
    line-height: 1.7;
}

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

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

/* ---- 额外装饰元素 ---- */
/* 数字28浮动装饰 */
.float-number {
    position: absolute;
    font-size: 14rem;
    font-weight: 900;
    color: rgba(255, 107, 53, 0.03);
    pointer-events: none;
    user-select: none;
    letter-spacing: -10px;
    line-height: 1;
}

/* 彩色圆点装饰 */
.dots-pattern {
    position: absolute;
    width: 120px;
    height: 120px;
    background-image:
        radial-gradient(circle, #FF6B35 2px, transparent 2px),
        radial-gradient(circle, #2EC4B6 2px, transparent 2px);
    background-size: 16px 16px, 16px 16px;
    background-position: 0 0, 8px 8px;
    opacity: 0.08;
    pointer-events: none;
    border-radius: 20px;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.6rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .feature-block {
        gap: 40px;
    }
    .footer-grid {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .site-header {
        background: rgba(255, 248, 242, 0.96);
    }

    .header-inner {
        height: 64px;
    }

    .main-nav {
        display: none;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(255, 248, 242, 0.98);
        backdrop-filter: blur(16px);
        padding: 24px 28px;
        gap: 18px;
        border-bottom: 1px solid rgba(255, 107, 53, 0.08);
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.04);
    }

    .main-nav.open a {
        font-size: 1.05rem;
        padding: 8px 0;
    }

    .main-nav.open .nav-cta {
        margin-top: 8px;
        text-align: center;
        padding: 12px 0 !important;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

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

    .hero-content {
        max-width: 100%;
    }

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

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

    .hero::after {
        font-size: 10rem;
        right: 0;
        bottom: 5%;
    }

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

    .feature-text h3 {
        font-size: 1.5rem;
    }

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

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

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

    .section {
        padding: 60px 0;
    }

    .section::before {
        font-size: 6rem;
        right: -10px;
        top: 10px;
    }

    .section:nth-child(even)::before {
        left: -10px;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }

    .cta-banner {
        padding: 40px 24px;
    }

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

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

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

    .hero {
        padding: 90px 0 40px;
    }

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

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

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

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

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

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

    .stat-item {
        padding: 20px 16px;
    }

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

    .feature-block {
        gap: 24px;
    }

    .cta-banner {
        padding: 32px 20px;
        border-radius: 16px;
    }

    .cta-banner h2 {
        font-size: 1.3rem;
    }

    .section::before {
        display: none;
    }

    .site-footer {
        padding: 40px 0 24px;
    }

    .faq-item .faq-question {
        padding: 14px 18px;
        font-size: 0.9rem;
    }

    .faq-item .faq-answer {
        padding: 0 18px 14px;
    }
}

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

::-webkit-scrollbar-track {
    background: #FFF4ED;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #FF6B35, #FF8F65);
    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #FF8F65, #FF6B35);
}

/* ---- 选中文字颜色 ---- */
::selection {
    background: rgba(255, 107, 53, 0.20);
    color: #1A1A2E;
}