/* ================================================================
   龙禁漫 · 笔绘乾坤 — 纸墨设计系统
   "Paper & Ink" Awwwards Style CSS
================================================================ */

/* ===== 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-color: #F8F4EC;
    background-image:
        radial-gradient(ellipse at 85% 15%, rgba(196, 58, 43, 0.05), transparent 55%),
        radial-gradient(ellipse at 10% 85%, rgba(61, 107, 93, 0.05), transparent 55%);
    color: #2A2825;
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(196, 58, 43, 0.15);
    color: #A02A1D;
}

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

.section {
    padding: 90px 0;
    position: relative;
}

.section:nth-child(even) {
    background:
        radial-gradient(ellipse at 25% 30%, rgba(61, 107, 93, 0.04), transparent 50%),
        radial-gradient(ellipse at 75% 70%, rgba(196, 58, 43, 0.03), transparent 45%),
        #F0EAE0;
}

/* ===== 导航 — 固定顶部 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(248, 244, 236, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(42, 40, 37, 0.08);
    box-shadow: 0 1px 30px rgba(42, 40, 37, 0.03);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.3rem;
    text-decoration: none;
    color: #2A2825;
    font-family: 'Songti SC', 'SimSun', serif;
    letter-spacing: 0.02em;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    background: linear-gradient(135deg, #C43A2B, #8C2A1E);
    color: #F8F4EC;
    box-shadow: 0 4px 14px rgba(196, 58, 43, 0.35);
    font-family: 'Songti SC', serif;
    font-weight: 900;
}

.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: #2A2825;
    transition: color 0.3s ease;
    position: relative;
    letter-spacing: 0.03em;
    padding: 4px 0;
}

.main-nav a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #C43A2B;
    border-radius: 2px;
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:not(.nav-cta):hover {
    color: #C43A2B;
}

.main-nav a:not(.nav-cta):hover::after {
    width: 100%;
}

.nav-cta {
    padding: 9px 24px;
    border-radius: 100px;
    color: #F8F4EC !important;
    font-weight: 600;
    background: #2A2825;
    box-shadow: 0 2px 12px rgba(42, 40, 37, 0.18);
    transition: all 0.3s ease;
}

.nav-cta:hover {
    transform: translateY(-2px);
    background: #C43A2B;
    box-shadow: 0 6px 20px rgba(196, 58, 43, 0.3);
}

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

.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(42, 40, 37, 0.1);
    background: transparent;
    border-radius: 14px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: border-color 0.3s;
}

.menu-toggle::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: #2A2825;
    border-radius: 2px;
    box-shadow: 0 6px 0 #2A2825, 0 -6px 0 #2A2825;
    transition: transform 0.3s;
}

.menu-toggle:hover {
    border-color: rgba(196, 58, 43, 0.4);
}

/* ===== 首页 Hero ===== */
.hero {
    min-height: 88vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(196, 58, 43, 0.02), transparent 60%),
        linear-gradient(315deg, rgba(61, 107, 93, 0.02), transparent 60%);
    padding-top: 76px;
}

/* 巨大“龍”字作为背景装饰 */
.hero::before {
    content: '龍';
    position: absolute;
    right: 3%;
    top: 50%;
    transform: translateY(-50%) rotate(8deg);
    font-family: 'Songti SC', 'SimSun', serif;
    font-size: clamp(12rem, 28vw, 24rem);
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(42, 40, 37, 0.06);
    pointer-events: none;
    z-index: 0;
    line-height: 1;
}

.hero::after {
    content: 'SCROLL ↓';
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.62rem;
    letter-spacing: 5px;
    color: rgba(42, 40, 37, 0.35);
    font-weight: 600;
    z-index: 1;
}

.hero-content {
    max-width: 720px;
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 7px 20px;
    border-radius: 100px;
    margin-bottom: 24px;
    background: rgba(196, 58, 43, 0.08);
    color: #C43A2B;
    letter-spacing: 3px;
    border: 1px solid rgba(196, 58, 43, 0.12);
}

.hero h1 {
    font-size: clamp(2.6rem, 5.5vw, 3.8rem);
    line-height: 1.12;
    margin-bottom: 24px;
    font-family: 'Songti SC', 'SimSun', serif;
    font-weight: 900;
    letter-spacing: 0.01em;
    color: #2A2825;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.65;
    max-width: 560px;
    margin-bottom: 40px;
    line-height: 1.9;
}

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

.hero-image {
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 30px 80px rgba(42, 40, 37, 0.08);
    background:
        radial-gradient(circle at 30% 70%, rgba(196, 58, 43, 0.14), transparent 60%),
        radial-gradient(circle at 70% 30%, rgba(61, 107, 93, 0.12), transparent 55%),
        linear-gradient(145deg, #EDE5D9, #F7F3EC);
    min-height: 420px;
}

.hero-image::before {
    content: '筆';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Songti SC', serif;
    font-size: 9rem;
    font-weight: 900;
    color: rgba(42, 40, 37, 0.06);
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: 24px;
    border: 1px solid rgba(42, 40, 37, 0.08);
    border-radius: 14px;
    pointer-events: none;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    position: relative;
    z-index: 1;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 34px;
    border-radius: 100px;
    font-weight: 600;
    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: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #C43A2B, #A02E20);
    color: #F8F4EC;
    box-shadow: 0 6px 24px rgba(196, 58, 43, 0.28);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -120%;
    width: 80%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
    transform: skewX(-20deg);
    transition: left 0.55s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(196, 58, 43, 0.36);
}

.btn-primary:hover::before {
    left: 130%;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid rgba(42, 40, 37, 0.35);
    color: #2A2825;
}

.btn-outline:hover {
    background: #2A2825;
    color: #F8F4EC;
    border-color: #2A2825;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(42, 40, 37, 0.15);
}

/* ===== 标签 / 标题 ===== */
.section-label {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 5px;
    margin-bottom: 14px;
    color: #C43A2B;
    text-transform: uppercase;
    padding-left: 16px;
    position: relative;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    background: #C43A2B;
    transform: translateY(-50%) rotate(45deg);
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 2.6rem);
    margin-bottom: 16px;
    font-family: 'Songti SC', 'SimSun', serif;
    font-weight: 900;
    color: #2A2825;
    line-height: 1.25;
    letter-spacing: 0.01em;
}

.section-desc {
    max-width: 600px;
    opacity: 0.6;
    margin-bottom: 48px;
    line-height: 1.9;
    font-size: 1.05rem;
}

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

.category-card {
    border-radius: 18px;
    padding: 36px 28px;
    border: 1px solid rgba(42, 40, 37, 0.06);
    background: #FDFBF7;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #C43A2B, #E5A39B);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-card::after {
    content: '';
    position: absolute;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(196, 58, 43, 0.1);
    transition: all 0.4s ease;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(42, 40, 37, 0.07);
}

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

.category-card:hover::after {
    transform: scale(1.4);
    border-color: rgba(196, 58, 43, 0.05);
}

.card-icon {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.4rem;
    background: rgba(196, 58, 43, 0.07);
    color: #C43A2B;
    transition: all 0.4s ease;
}

.category-card:hover .card-icon {
    background: rgba(196, 58, 43, 0.12);
    transform: scale(1.05) rotate(-3deg);
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: #C43A2B;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    transition: gap 0.3s ease;
}

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

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

.card-link:hover::after {
    transform: translateX(2px);
}

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

.feature-image {
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    background:
        radial-gradient(circle at 50% 50%, rgba(196, 58, 43, 0.06), transparent 60%),
        #EFE9DD;
    box-shadow: 0 24px 60px rgba(42, 40, 37, 0.07);
    min-height: 340px;
}

.feature-image::before {
    content: '繪';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Songti SC', serif;
    font-size: 7rem;
    font-weight: 900;
    color: rgba(42, 40, 37, 0.05);
}

.feature-image::after {
    content: '';
    position: absolute;
    inset: 20px;
    border: 1px solid rgba(42, 40, 37, 0.08);
    border-radius: 14px;
    pointer-events: none;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    position: relative;
    z-index: 1;
}

.feature-text {
    position: relative;
    z-index: 1;
}

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

.feature-list li {
    padding: 9px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: rgba(42, 40, 37, 0.85);
    border-bottom: 1px dashed rgba(42, 40, 37, 0.05);
}

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

.feature-list li::before {
    content: '✦';
    font-weight: 700;
    color: #C43A2B;
    font-size: 0.9rem;
    flex-shrink: 0;
}

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

.stat-item {
    padding: 40px 24px;
    border-radius: 18px;
    border: 1px solid rgba(42, 40, 37, 0.06);
    background: #FDFBF7;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.stat-item::before {
    content: '';
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(196, 58, 43, 0.04);
    top: -50px;
    right: -40px;
    transition: transform 0.4s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(42, 40, 37, 0.06);
}

.stat-item:hover::before {
    transform: scale(1.5);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    font-family: 'Songti SC', 'SimSun', serif;
    color: #2A2825;
    line-height: 1.1;
    display: block;
}

.stat-label {
    font-size: 0.82rem;
    opacity: 0.55;
    margin-top: 12px;
    letter-spacing: 2px;
    font-weight: 500;
}

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

.content-wall-item {
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(42, 40, 37, 0.06);
    background: #FDFBF7;
    transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.content-wall-item::after {
    content: '筆';
    position: absolute;
    top: 16px;
    right: 16px;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #C43A2B, #A02E20);
    color: #F8F4EC;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-family: 'Songti SC', serif;
    font-weight: 700;
    opacity: 0;
    transform: scale(0.4) rotate(-20deg);
    transition: all 0.4s ease;
    z-index: 3;
    box-shadow: 0 4px 16px rgba(196, 58, 43, 0.3);
    pointer-events: none;
}

.content-wall-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 60px rgba(42, 40, 37, 0.1);
}

.content-wall-item:hover::after {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

.content-wall-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(135deg, #E8E0D4, #F0EBE3);
}

.content-wall-item:hover img {
    transform: scale(1.06);
}

.content-wall-item:nth-child(2n) img {
    background: linear-gradient(135deg, rgba(61, 107, 93, 0.12), #E8E0D4);
}

.content-wall-item:nth-child(3n) img {
    background: linear-gradient(135deg, rgba(196, 58, 43, 0.1), #F0EBE3);
}

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

.content-wall-body h3 {
    font-family: 'Songti SC', serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #2A2825;
}

.content-wall-body p {
    font-size: 0.88rem;
    opacity: 0.6;
    line-height: 1.7;
}

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

.faq-item {
    border: 1px solid rgba(42, 40, 37, 0.07);
    border-radius: 16px;
    margin-bottom: 12px;
    overflow: hidden;
    cursor: pointer;
    background: #FDFBF7;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(196, 58, 43, 0.2);
    box-shadow: 0 4px 20px rgba(42, 40, 37, 0.03);
}

.faq-item.open {
    border-color: rgba(196, 58, 43, 0.25);
    box-shadow: 0 8px 30px rgba(196, 58, 43, 0.05);
}

.faq-item .faq-question {
    padding: 22px 28px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Songti SC', 'SimSun', serif;
    font-size: 1.02rem;
    color: #2A2825;
    transition: color 0.3s;
}

.faq-item .faq-question::after {
    content: '＋';
    font-size: 1.3rem;
    font-weight: 300;
    color: #C43A2B;
    transition: transform 0.4s ease, color 0.3s;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
    color: #C43A2B;
}

.faq-item .faq-answer {
    padding: 0 28px 24px;
    display: none;
    opacity: 0;
    line-height: 1.9;
    font-size: 0.92rem;
    color: rgba(42, 40, 37, 0.7);
    animation: faqReveal 0.45s ease forwards;
}

.faq-item.open .faq-answer {
    display: block;
    opacity: 1;
}

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

/* ===== CTA 横幅 ===== */
.cta-banner {
    padding: 72px 40px;
    text-align: center;
    border-radius: 24px;
    color: #F8F4EC;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.12), transparent 50%),
        linear-gradient(135deg, #C43A2B, #7A2418);
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(196, 58, 43, 0.25);
}

.cta-banner::before {
    content: '龍';
    position: absolute;
    right: 4%;
    top: 50%;
    transform: translateY(-50%) rotate(15deg);
    font-family: 'Songti SC', serif;
    font-size: 12rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.06);
    pointer-events: none;
    line-height: 1;
}

.cta-banner::after {
    content: '';
    position: absolute;
    left: 4%;
    bottom: 30%;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    pointer-events: none;
}

.cta-banner h2 {
    color: #F8F4EC;
    font-family: 'Songti SC', serif;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(248, 244, 236, 0.8);
    margin-bottom: 28px;
    font-size: 1.05rem;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary {
    background: #F8F4EC;
    color: #C43A2B;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary::before {
    display: none;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
}

/* ===== 页脚 ===== */
.site-footer {
    padding: 70px 0 32px;
    background: #EDE7DA;
    color: #2A2825;
    margin-top: 30px;
    border-top: 1px solid rgba(42, 40, 37, 0.05);
    position: relative;
}

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

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

.footer-brand {
    font-family: 'Songti SC', 'SimSun', serif;
    font-size: 1.3rem;
    font-weight: 900;
    color: #2A2825;
}

.footer-brand p {
    font-size: 0.88rem;
    opacity: 0.55;
    margin-top: 14px;
    line-height: 1.9;
    max-width: 260px;
    font-family: system-ui, sans-serif;
    font-weight: 400;
}

.footer-col h4 {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 18px;
    color: #2A2825;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: #C43A2B;
    border-radius: 2px;
}

.footer-col a {
    display: block;
    color: rgba(42, 40, 37, 0.6);
    text-decoration: none;
    padding: 5px 0;
    font-size: 0.88rem;
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-col a:hover {
    color: #C43A2B;
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid rgba(42, 40, 37, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.82rem;
    color: rgba(42, 40, 37, 0.45);
}

/* ===== 工具类 ===== */
.text-accent {
    color: #C43A2B;
    font-family: 'Songti SC', 'SimSun', serif;
    font-weight: 900;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 56px;
    opacity: 0.6;
    line-height: 1.9;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero {
        min-height: 75vh;
    }

    .hero::before {
        font-size: 14rem;
        right: -20px;
    }

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

@media (max-width: 768px) {
    .section {
        padding: 70px 0;
    }

    .site-header {
        background: rgba(248, 244, 236, 0.96);
    }

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

    .feature-image {
        min-height: 260px;
    }

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

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

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

    .main-nav {
        display: none;
        position: absolute;
        top: 76px;
        left: 16px;
        right: 16px;
        width: auto;
        background: rgba(248, 244, 236, 0.98);
        backdrop-filter: blur(20px);
        border-radius: 20px;
        padding: 24px;
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        box-shadow: 0 20px 60px rgba(42, 40, 37, 0.12);
        border: 1px solid rgba(42, 40, 37, 0.06);
        list-style: none;
        z-index: 1000;
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        padding: 12px 16px;
        border-radius: 12px;
        font-size: 1rem;
    }

    .main-nav a:not(.nav-cta):hover {
        background: rgba(196, 58, 43, 0.06);
    }

    .main-nav a:not(.nav-cta)::after {
        display: none;
    }

    .nav-cta {
        text-align: center;
        padding: 14px 24px;
    }

    .menu-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 80px;
    }

    .hero::before {
        font-size: 9rem;
        right: -10px;
        opacity: 0.5;
    }

    .hero::after {
        display: none;
    }

    .hero h1 {
        font-size: 2.4rem;
    }

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

    .cta-banner {
        padding: 48px 24px;
        border-radius: 20px;
    }

    .cta-banner::before {
        font-size: 7rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 56px 0;
    }

    .container {
        padding: 0 20px;
    }

    .stats-bar {
        grid-template-columns: 1fr 1fr;
    }

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

    .cards-grid,
    .content-wall {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

    .hero-eyebrow {
        font-size: 0.7rem;
        padding: 6px 14px;
    }

    .feature-block {
        gap: 32px;
    }

    .feature-image {
        min-height: 220px;
        border-radius: 16px;
    }

    .feature-image::before {
        font-size: 5rem;
    }

    .faq-item .faq-question {
        padding: 18px 20px;
        font-size: 0.95rem;
    }

    .faq-item .faq-answer {
        padding: 0 20px 20px;
    }

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

    .cta-banner::before {
        font-size: 5rem;
    }
}

/* ===== 移动端菜单开合状态 ===== */
.main-nav.open a {
    opacity: 0;
    animation: navFadeIn 0.4s ease forwards;
}

.main-nav.open a:nth-child(1) { animation-delay: 0.05s; }
.main-nav.open a:nth-child(2) { animation-delay: 0.1s; }
.main-nav.open a:nth-child(3) { animation-delay: 0.15s; }
.main-nav.open a:nth-child(4) { animation-delay: 0.2s; }
.main-nav.open a:nth-child(5) { animation-delay: 0.25s; }
.main-nav.open a:nth-child(6) { animation-delay: 0.3s; }

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