/* =============================================
   问鼎国际平台 — "翠微晨光" 设计系统
   风格：东方极简 · 自然光影 · 温润质感
   ============================================= */

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
    background: #F7F4EE;
    color: #3D3833;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #F0EBE0;
}
::-webkit-scrollbar-thumb {
    background: #B8A898;
    border-radius: 3px;
}

/* 选中文本颜色 */
::selection {
    background: #5BA88C;
    color: #fff;
}

/* =============================================
   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: #F0EBE0;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #D4A84B, transparent);
    opacity: 0.4;
}

/* =============================================
   导航 — 固定顶部 · 极简通透
   ============================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(247, 244, 238, 0.92);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(180, 160, 140, 0.15);
    transition: all 0.4s ease;
}

.site-header.scrolled {
    background: rgba(247, 244, 238, 0.98);
    box-shadow: 0 2px 30px rgba(61, 56, 51, 0.06);
}

.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: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: #3D3833;
    letter-spacing: 0.5px;
    position: relative;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: linear-gradient(135deg, #5BA88C, #3D8A72);
    color: #fff;
    box-shadow: 0 4px 12px rgba(91, 168, 140, 0.25);
    transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
    transform: rotate(-5deg) scale(1.05);
}

.logo span {
    font-weight: 300;
    color: #8A7A6A;
    font-size: 0.85rem;
    letter-spacing: 2px;
    margin-left: 2px;
}

.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: #5D5248;
    transition: all 0.25s ease;
    position: relative;
    padding: 4px 0;
    letter-spacing: 0.3px;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #5BA88C;
    transition: width 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.main-nav a:hover {
    color: #3D3833;
}

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

.nav-cta {
    padding: 10px 24px !important;
    border-radius: 8px;
    color: #fff !important;
    font-weight: 600;
    background: linear-gradient(135deg, #5BA88C, #4A9A7E) !important;
    box-shadow: 0 4px 14px rgba(91, 168, 140, 0.3);
    transition: all 0.3s ease !important;
    letter-spacing: 0.5px;
}

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

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(91, 168, 140, 0.4) !important;
    color: #fff !important;
}

.menu-toggle {
    display: none;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(91, 168, 140, 0.1);
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: rgba(91, 168, 140, 0.2);
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: #3D3833;
    position: relative;
    transition: 0.3s;
}

.menu-toggle span::before,
.menu-toggle span::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: #3D3833;
    transition: 0.3s;
}

.menu-toggle span::before {
    top: -6px;
}

.menu-toggle span::after {
    top: 6px;
}

.menu-toggle.open span {
    background: transparent;
}

.menu-toggle.open span::before {
    top: 0;
    transform: rotate(45deg);
}

.menu-toggle.open span::after {
    top: 0;
    transform: rotate(-45deg);
}

/* =============================================
   Hero — 大标题 · 光影层次
   ============================================= */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(165deg, #F7F4EE 0%, #F0EBE0 40%, #E8F0EC 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(91, 168, 140, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 168, 75, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 580px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 20px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(91, 168, 140, 0.12), rgba(212, 168, 75, 0.08));
    color: #4A9A7E;
    letter-spacing: 1.5px;
    border: 1px solid rgba(91, 168, 140, 0.15);
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.18;
    margin-bottom: 22px;
    font-weight: 800;
    color: #2D3833;
    letter-spacing: -0.5px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #5BA88C, #3D8A72);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    color: #7A6E62;
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.7;
    font-weight: 400;
}

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

.hero-image {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 60px rgba(61, 56, 51, 0.08);
    background: #E8F0EC;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image::before {
    content: '✦';
    font-size: 4rem;
    color: rgba(91, 168, 140, 0.2);
    position: absolute;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

/* =============================================
   按钮系统
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #5BA88C, #3D8A72);
    box-shadow: 0 6px 20px rgba(91, 168, 140, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(91, 168, 140, 0.4);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid #C4B8A8;
    color: #3D3833;
}

.btn-outline:hover {
    border-color: #5BA88C;
    color: #5BA88C;
    background: rgba(91, 168, 140, 0.04);
    transform: translateY(-2px);
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
    top: -100px;
    left: -100px;
}

/* =============================================
   标签 / 标题
   ============================================= */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 16px;
    color: #8A7A6A;
    text-transform: uppercase;
    position: relative;
    padding-left: 28px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 18px;
    height: 1.5px;
    background: #D4A84B;
    transform: translateY(-50%);
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-weight: 700;
    color: #2D3833;
    letter-spacing: -0.3px;
    line-height: 1.25;
}

.section-desc {
    max-width: 600px;
    color: #7A6E62;
    margin-bottom: 48px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* =============================================
   卡片网格
   ============================================= */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.category-card {
    border-radius: 16px;
    padding: 32px 28px;
    background: #FAF8F4;
    border: 1px solid rgba(196, 184, 168, 0.2);
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #5BA88C, #D4A84B);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(61, 56, 51, 0.07);
    border-color: rgba(91, 168, 140, 0.2);
}

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

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.4rem;
    background: linear-gradient(135deg, rgba(91, 168, 140, 0.1), rgba(212, 168, 75, 0.05));
    color: #5BA88C;
    transition: all 0.3s ease;
}

.category-card:hover .card-icon {
    background: linear-gradient(135deg, #5BA88C, #3D8A72);
    color: #fff;
    transform: scale(1.05) rotate(-5deg);
}

.category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #2D3833;
}

.category-card p {
    font-size: 0.9rem;
    color: #8A7A6A;
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: #5BA88C;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.card-link:hover {
    gap: 12px;
    color: #3D8A72;
}

/* =============================================
   特性块 — 图文交错
   ============================================= */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-block.reverse {
    direction: rtl;
}

.feature-block.reverse > * {
    direction: ltr;
}

.feature-image {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    background: #E8F0EC;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 40px rgba(61, 56, 51, 0.06);
}

.feature-image::before {
    content: '◆';
    font-size: 3rem;
    color: rgba(91, 168, 140, 0.12);
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.feature-image:hover img {
    transform: scale(1.04);
}

.feature-text {
    padding: 20px 0;
}

.feature-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #2D3833;
}

.feature-text p {
    color: #7A6E62;
    line-height: 1.7;
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
    display: grid;
    gap: 12px;
}

.feature-list li {
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: #4D4843;
}

.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: #5BA88C;
    background: rgba(91, 168, 140, 0.1);
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* =============================================
   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: 16px;
    background: #FAF8F4;
    border: 1px solid rgba(196, 184, 168, 0.15);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: #D4A84B;
    border-radius: 1px;
    opacity: 0;
    transition: opacity 0.3s, width 0.3s;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(61, 56, 51, 0.06);
}

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

.stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: #2D3833;
    line-height: 1;
    margin-bottom: 6px;
    background: linear-gradient(135deg, #5BA88C, #3D8A72);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: #8A7A6A;
    font-weight: 500;
    letter-spacing: 0.5px;
}

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

.content-wall-item {
    border-radius: 16px;
    overflow: hidden;
    background: #FAF8F4;
    border: 1px solid rgba(196, 184, 168, 0.15);
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(61, 56, 51, 0.07);
    border-color: rgba(91, 168, 140, 0.2);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.content-wall-item:hover img {
    transform: scale(1.05);
}

.content-wall-body {
    padding: 24px 24px 28px;
}

.content-wall-body .meta {
    font-size: 0.75rem;
    color: #A89A8A;
    letter-spacing: 1px;
    margin-bottom: 8px;
    display: flex;
    gap: 12px;
}

.content-wall-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #2D3833;
    line-height: 1.4;
}

.content-wall-body p {
    font-size: 0.9rem;
    color: #7A6E62;
    line-height: 1.6;
}

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

.faq-item {
    border: 1px solid rgba(196, 184, 168, 0.2);
    border-radius: 12px;
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: #FAF8F4;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(91, 168, 140, 0.25);
}

.faq-item .faq-question {
    padding: 20px 24px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    color: #2D3833;
    letter-spacing: 0.2px;
    user-select: none;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 300;
    color: #B8A898;
    transition: transform 0.4s ease, color 0.3s;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    color: #5BA88C;
}

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    color: #7A6E62;
    line-height: 1.7;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    display: block;
    animation: fadeSlideUp 0.4s ease;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =============================================
   CTA 横幅
   ============================================= */
.cta-banner {
    padding: 72px 40px;
    text-align: center;
    border-radius: 20px;
    background: linear-gradient(135deg, #5BA88C, #3D8A72, #2D7A62);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 168, 75, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 520px;
    margin: 0 auto 32px;
    font-size: 1.05rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #3D8A72;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
}

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

/* =============================================
   页脚
   ============================================= */
.site-footer {
    padding: 64px 0 32px;
    background: #2D3833;
    color: rgba(255, 255, 255, 0.85);
}

.site-footer .container {
    position: relative;
}

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

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

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, #D4A84B, #B8923A);
    box-shadow: 0 4px 12px rgba(212, 168, 75, 0.25);
}

.footer-brand .logo span {
    color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 12px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: #D4A84B;
    border-radius: 1px;
}

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

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

.footer-col ul a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-col ul a:hover {
    color: #D4A84B;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.5px;
}

/* =============================================
   工具类
   ============================================= */
.text-accent {
    color: #5BA88C;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    color: #7A6E62;
    line-height: 1.7;
}

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

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

/* 装饰分隔线 */
.divider {
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, #5BA88C, #D4A84B);
    border-radius: 2px;
    margin: 24px 0;
}

/* 标签云 */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #5D5248;
    background: rgba(91, 168, 140, 0.08);
    border: 1px solid rgba(91, 168, 140, 0.12);
    transition: all 0.3s ease;
    text-decoration: none;
}

.tag:hover {
    background: rgba(91, 168, 140, 0.15);
    border-color: rgba(91, 168, 140, 0.25);
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.animate-in-delay-1 {
    animation-delay: 0.1s;
}

.animate-in-delay-2 {
    animation-delay: 0.2s;
}

.animate-in-delay-3 {
    animation-delay: 0.3s;
}

/* =============================================
   响应式 — 768px
   ============================================= */
@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .hero p {
        margin: 0 auto 32px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        aspect-ratio: 16/10;
        max-width: 500px;
        margin: 0 auto;
    }

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

    .feature-block.reverse {
        direction: ltr;
    }

    .feature-text {
        padding: 0;
    }

    .feature-list {
        text-align: left;
        max-width: 400px;
        margin: 0 auto;
    }

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

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

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

    .footer-brand {
        grid-column: 1 / -1;
        max-width: 100%;
        text-align: center;
    }

    .footer-brand .logo {
        justify-content: center;
    }

    .footer-col h4::after {
        left: 50%;
        transform: translateX(-50%);
    }

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

    .main-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(247, 244, 238, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px 28px;
        gap: 18px;
        border-bottom: 1px solid rgba(196, 184, 168, 0.15);
        box-shadow: 0 20px 40px rgba(61, 56, 51, 0.06);
        animation: fadeSlideUp 0.3s ease;
    }

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

    .main-nav.open .nav-cta {
        text-align: center;
        margin-top: 8px;
    }

    .section {
        padding: 72px 0;
    }

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

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }

    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }

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

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

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

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

    .section-title {
        font-size: 1.5rem;
    }

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

    .header-inner {
        height: 64px;
        padding: 0 16px;
    }

    .container {
        padding: 0 16px;
    }

    .section {
        padding: 56px 0;
    }

    .cta-banner {
        padding: 36px 20px;
        border-radius: 12px;
    }

    .cta-banner h2 {
        font-size: 1.4rem;
    }

    .feature-list li {
        font-size: 0.85rem;
    }

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

    .content-wall-body {
        padding: 18px 18px 22px;
    }

    .faq-item .faq-question {
        padding: 16px 18px;
        font-size: 0.9rem;
    }

    .faq-item .faq-answer {
        padding: 0 18px 16px;
        font-size: 0.85rem;
    }
}

/* =============================================
   响应式 — 1024px 优化
   ============================================= */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero .container {
        gap: 40px;
    }

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

    .feature-block {
        gap: 40px;
    }

    .stats-bar {
        gap: 20px;
    }

    .footer-grid {
        gap: 32px;
    }

    .main-nav {
        gap: 24px;
    }
}

/* =============================================
   打印样式
   ============================================= */
@media print {
    .site-header {
        position: relative;
        background: #fff;
        border-bottom: 1px solid #ddd;
    }

    .hero {
        min-height: auto;
        padding: 40px 0;
        background: #fff;
    }

    .btn,
    .nav-cta,
    .cta-banner .btn-primary {
        box-shadow: none;
        color: #000 !important;
        background: #f5f5f5 !important;
        border: 1px solid #ddd;
    }

    .cta-banner {
        background: #f5f5f5 !important;
        color: #000 !important;
    }

    .cta-banner h2 {
        color: #000 !important;
    }

    .site-footer {
        background: #f5f5f5 !important;
        color: #000 !important;
    }

    .site-footer .logo {
        color: #000 !important;
    }

    .footer-col ul a {
        color: #555 !important;
    }

    .stat-number {
        -webkit-text-fill-color: #2D3833;
    }
}