/* ===== 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: #FDF6EC;
    color: #2D3436;
    line-height: 1.6;
}

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

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

.section:nth-child(even) {
    background: #F5F0EB;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #FF7A59 0%, #4ECDC4 100%);
    opacity: 0.3;
}

/* ===== 导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(253, 246, 236, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 122, 89, 0.15);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.3rem;
    text-decoration: none;
    color: #FF7A59;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    background: linear-gradient(135deg, #FF7A59 0%, #FFB347 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(255, 122, 89, 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: #2D3436;
    transition: 0.3s;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #FF7A59;
    transition: width 0.3s;
}

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

.nav-cta {
    padding: 10px 24px;
    border-radius: 50px;
    background: linear-gradient(135deg, #FF7A59, #FF9A5C);
    color: #fff !important;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(255, 122, 89, 0.25);
    transition: all 0.25s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 122, 89, 0.35);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: #2D3436;
    border-radius: 2px;
    transition: 0.3s;
}

/* ===== Hero ===== */
.hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    background: linear-gradient(160deg, #FDF6EC 40%, #F1E8D9 100%);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    right: -20%;
    top: -30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(78, 205, 196, 0.15), transparent);
    border-radius: 50%;
    pointer-events: none;
}

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

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 18px;
    background: rgba(255, 122, 89, 0.12);
    color: #FF7A59;
    letter-spacing: 1px;
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.15;
    margin-bottom: 22px;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero h1 .text-accent {
    background: linear-gradient(135deg, #FF7A59, #FFB347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.7;
    max-width: 520px;
    margin-bottom: 36px;
    color: #555;
}

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

.hero-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(45, 52, 54, 0.12);
    transform: perspective(1000px) rotateY(-4deg);
    transition: 0.5s;
}

.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: 0.25s;
    font-size: 0.95rem;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #FF7A59, #FF9A5C);
    box-shadow: 0 4px 14px rgba(255, 122, 89, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 122, 89, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid #FF7A59;
    color: #FF7A59;
}

.btn-outline:hover {
    background: rgba(255, 122, 89, 0.08);
    border-color: #FF9A5C;
}

/* ===== 标签/标题 ===== */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 14px;
    color: #4ECDC4;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 16px;
    font-weight: 800;
    line-height: 1.2;
}

.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 44px;
    color: #555;
}

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

.category-card {
    border-radius: 20px;
    padding: 32px;
    background: #fff;
    border: 1px solid rgba(78, 205, 196, 0.2);
    transition: 0.35s;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(255, 122, 89, 0.12);
    border-color: #FF7A59;
}

.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, #FF7A59 0%, #FFB347 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(255, 122, 89, 0.25);
}

.category-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.category-card p {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 16px;
}

.card-link {
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    color: #FF7A59;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

/* ===== 特性块 ===== */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.feature-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

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

.feature-text h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.feature-text p {
    opacity: 0.7;
    margin-bottom: 20px;
}

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

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: #4ECDC4;
    font-size: 1.1rem;
}

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

.stat-item {
    padding: 28px 16px;
    border-radius: 20px;
    border: 1px solid rgba(78, 205, 196, 0.25);
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: 0.3s;
}

.stat-item:hover {
    border-color: #FF7A59;
    transform: scale(1.03);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: #FF7A59;
    line-height: 1;
}

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

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

.content-wall-item {
    border-radius: 20px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(78, 205, 196, 0.15);
    transition: 0.3s;
}

.content-wall-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(255, 122, 89, 0.1);
    border-color: #FF7A59;
}

.content-wall-item img {
    width: 100%;
    height: 210px;
    object-fit: cover;
}

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

.content-wall-body h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.content-wall-body p {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 12px;
}

.content-wall-body .card-link {
    font-size: 0.8rem;
}

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

.faq-item {
    border: 1px solid rgba(78, 205, 196, 0.2);
    border-radius: 16px;
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
    transition: 0.3s;
}

.faq-item:hover {
    border-color: #FF7A59;
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    color: #2D3436;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    transition: 0.3s;
    color: #FF7A59;
}

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

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    opacity: 0.7;
    line-height: 1.7;
}

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

/* ===== CTA横幅 ===== */
.cta-banner {
    padding: 64px 24px;
    text-align: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #FF7A59 0%, #FF9A5C 100%);
    color: #fff;
    box-shadow: 0 12px 36px rgba(255, 122, 89, 0.25);
}

.cta-banner h2 {
    color: #fff;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.cta-banner p {
    opacity: 0.9;
    max-width: 500px;
    margin: 0 auto 28px;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #FF7A59;
    box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}

.cta-banner .btn-primary:hover {
    background: #f8f8f8;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* ===== 页脚 ===== */
.site-footer {
    padding: 64px 0 28px;
    background: #F5F0EB;
}

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

.footer-brand p {
    opacity: 0.6;
    margin-top: 16px;
    font-size: 0.9rem;
    max-width: 280px;
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    font-weight: 700;
}

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

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    text-decoration: none;
    color: #555;
    font-size: 0.9rem;
    transition: 0.2s;
}

.footer-col ul li a:hover {
    color: #FF7A59;
}

.footer-bottom {
    border-top: 1px solid rgba(45, 52, 54, 0.1);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ===== 工具类 ===== */
.text-accent {
    color: #FF7A59;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.7;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .feature-block {
        grid-template-columns: 1fr;
    }

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

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

    .main-nav {
        display: none;
        background: #fff;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        border-radius: 0 0 20px 20px;
    }

    .menu-toggle {
        display: flex;
    }

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

    .hero {
        min-height: 60vh;
    }

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

@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;
    }

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

    .btn {
        padding: 12px 24px;
    }
}