/* ============================================
   问鼎H5 · 青瓷叠翠 — 温润如玉的东方美学
   设计语言：圆弧层叠 + 青瓷釉色 + 轻透质感
   ============================================ */

/* 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: #FDF8F4;
    color: #2D4A40;
    line-height: 1.6;
}

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

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

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

/* ======== 导航 ======== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(253, 248, 244, 0.88);
    backdrop-filter: blur(20px) saturate(1.4);
    border-bottom: 1px solid rgba(91, 154, 139, 0.12);
}

.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: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: #2D4A40;
    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, #5B9A8B, #7DBBA8);
    color: #fff;
    box-shadow: 0 4px 12px rgba(91, 154, 139, 0.25);
}

.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: #4A6B60;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #5B9A8B;
    border-radius: 2px;
    transition: width 0.3s ease;
}

.main-nav a:hover {
    color: #5B9A8B;
}

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

.nav-cta {
    padding: 10px 24px !important;
    border-radius: 50px !important;
    color: #fff !important;
    font-weight: 600 !important;
    background: linear-gradient(135deg, #5B9A8B, #E8836B) !important;
    box-shadow: 0 4px 16px rgba(91, 154, 139, 0.3);
    transition: all 0.3s ease !important;
}

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

.nav-cta:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px rgba(91, 154, 139, 0.35) !important;
    color: #fff !important;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1.5px solid rgba(91, 154, 139, 0.25);
    background: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #5B9A8B;
    transition: 0.2s;
}

.menu-toggle:hover {
    background: #5B9A8B;
    color: #fff;
    border-color: #5B9A8B;
}

/* ======== Hero ======== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
    background: linear-gradient(165deg, #FDF8F4 0%, #F0EBE3 40%, #E8F3EF 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -15%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(91, 154, 139, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 131, 107, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 20px;
    background: rgba(91, 154, 139, 0.12);
    color: #5B9A8B;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.15;
    margin-bottom: 20px;
    color: #2D4A40;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.hero h1 .text-accent {
    background: linear-gradient(135deg, #5B9A8B, #E8836B);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.7;
    max-width: 560px;
    margin-bottom: 36px;
    color: #4A6B60;
    line-height: 1.7;
}

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

.hero-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(91, 154, 139, 0.12);
    background: #E8F3EF;
}

.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: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #5B9A8B, #4A8A7A);
    box-shadow: 0 6px 24px rgba(91, 154, 139, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 10px 32px rgba(91, 154, 139, 0.4);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(91, 154, 139, 0.3);
    color: #5B9A8B;
}

.btn-outline:hover {
    border-color: #5B9A8B;
    background: rgba(91, 154, 139, 0.06);
    transform: translateY(-3px);
}

/* ======== 标签/标题 ======== */
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 12px;
    color: #5B9A8B;
    text-transform: uppercase;
    padding: 4px 14px;
    border-radius: 50px;
    background: rgba(91, 154, 139, 0.08);
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 14px;
    color: #2D4A40;
    font-weight: 700;
    letter-spacing: -0.3px;
    line-height: 1.2;
}

.section-title .text-accent {
    color: #E8836B;
}

.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 48px;
    color: #4A6B60;
    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: 20px;
    padding: 32px 28px;
    border: 1px solid rgba(91, 154, 139, 0.08);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #5B9A8B, #E8836B);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(91, 154, 139, 0.12);
    border-color: rgba(91, 154, 139, 0.2);
}

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

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.4rem;
    background: linear-gradient(135deg, #E8F3EF, #F0EBE3);
    color: #5B9A8B;
    transition: all 0.3s ease;
}

.category-card:hover .card-icon {
    background: linear-gradient(135deg, #5B9A8B, #7DBBA8);
    color: #fff;
    box-shadow: 0 6px 20px rgba(91, 154, 139, 0.25);
}

.category-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: #2D4A40;
    font-weight: 700;
}

.category-card p {
    font-size: 0.9rem;
    opacity: 0.65;
    margin-bottom: 16px;
    color: #4A6B60;
    line-height: 1.6;
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: #5B9A8B;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.card-link:hover {
    gap: 12px;
    color: #E8836B;
}

/* ======== 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(91, 154, 139, 0.08);
    background: #E8F3EF;
}

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

.feature-text h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: #2D4A40;
}

.feature-text p {
    opacity: 0.7;
    margin-bottom: 24px;
    color: #4A6B60;
    line-height: 1.7;
}

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

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: #2D4A40;
}

.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: #5B9A8B;
    background: rgba(91, 154, 139, 0.1);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    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: 20px;
    border: 1px solid rgba(91, 154, 139, 0.08);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(91, 154, 139, 0.08);
    border-color: rgba(91, 154, 139, 0.15);
}

.stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: #5B9A8B;
    line-height: 1.1;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 8px;
    color: #4A6B60;
    font-weight: 500;
}

/* ======== 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(91, 154, 139, 0.08);
    background: #fff;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.content-wall-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(91, 154, 139, 0.1);
    border-color: rgba(91, 154, 139, 0.15);
}

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

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

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

.content-wall-body h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #2D4A40;
    font-weight: 700;
}

.content-wall-body p {
    font-size: 0.9rem;
    opacity: 0.65;
    color: #4A6B60;
    line-height: 1.6;
}

.content-wall-body .card-link {
    margin-top: 12px;
}

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

.faq-item {
    border: 1px solid rgba(91, 154, 139, 0.1);
    border-radius: 16px;
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(91, 154, 139, 0.2);
    box-shadow: 0 4px 16px rgba(91, 154, 139, 0.04);
}

.faq-item .faq-question {
    padding: 20px 24px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #2D4A40;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.faq-item .faq-question::after {
    content: '↓';
    font-size: 0.85rem;
    opacity: 0.4;
    transition: transform 0.3s ease;
    color: #5B9A8B;
}

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

.faq-item.open .faq-question {
    color: #5B9A8B;
}

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    opacity: 0.7;
    color: #4A6B60;
    line-height: 1.7;
}

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

@keyframes faqFadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 0.7;
        transform: translateY(0);
    }
}

/* ======== CTA横幅 ======== */
.cta-banner {
    padding: 72px 32px;
    text-align: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #5B9A8B 0%, #4A8A7A 40%, #E8836B 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -15%;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 500px;
    margin: 0 auto 28px;
    position: relative;
    z-index: 1;
    line-height: 1.6;
}

.cta-banner .btn-primary {
    background: #fff;
    color: #5B9A8B;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    background: #fff;
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.18);
    transform: translateY(-3px) scale(1.02);
    color: #2D4A40;
}

/* ======== 页脚 ======== */
.site-footer {
    padding: 64px 0 28px;
    background: #2D4A40;
    color: rgba(255, 255, 255, 0.8);
}

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

.footer-brand h3 {
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.footer-brand p {
    opacity: 0.6;
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 16px;
    font-weight: 600;
}

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

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

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: #7DBBA8;
}

.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;
    opacity: 0.5;
}

/* ======== 工具类 ======== */
.text-accent {
    color: #5B9A8B;
}

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

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.7;
    color: #4A6B60;
    line-height: 1.7;
}

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

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

/* ======== 装饰性圆点背景 ======== */
.dots-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(rgba(91, 154, 139, 0.06) 1.5px, transparent 1.5px);
    background-size: 28px 28px;
    pointer-events: none;
}

/* ======== 响应式 ======== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.6rem;
    }

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

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

@media (max-width: 768px) {
    .hero {
        min-height: 60vh;
        padding-top: 72px;
    }

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

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

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

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

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

    .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(253, 248, 244, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px 28px;
        gap: 16px;
        border-bottom: 1px solid rgba(91, 154, 139, 0.1);
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.06);
    }

    .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: 1.6rem;
    }

    .cards-grid {
        gap: 20px;
    }

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

    .cta-banner {
        padding: 48px 24px;
        border-radius: 16px;
    }

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

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

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

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

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

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

    .section-title {
        font-size: 1.35rem;
    }

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

    .feature-block {
        gap: 24px;
    }

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

    .container {
        padding: 0 16px;
    }
}

/* ======== 平滑滚动 ======== */
html {
    scroll-behavior: smooth;
}

/* ======== 选中文本颜色 ======== */
::selection {
    background: rgba(91, 154, 139, 0.2);
    color: #2D4A40;
}

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

::-webkit-scrollbar-track {
    background: #F5F0EB;
}

::-webkit-scrollbar-thumb {
    background: #5B9A8B;
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4A8A7A;
}