/* ========================================
   pt电子平台 - 铂金科技，智享不凡
   设计风格：威尼斯灰泥·暖调极简
   配色：奶油白 + 鼠尾草绿 + 赤陶锈色
   ======================================== */

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

:root {
    --cream: #faf7f2;
    --warm-gray: #f0ebe4;
    --sage: #7d9b76;
    --sage-dark: #5a7a53;
    --terracotta: #c17d60;
    --terracotta-light: #d9a68c;
    --text-primary: #3d3533;
    --text-secondary: #6b5f5a;
    --text-muted: #9a8c85;
    --white: #ffffff;
    --border: #e8e0d8;
    --shadow-sm: 0 2px 12px rgba(61, 53, 51, 0.06);
    --shadow-md: 0 6px 24px rgba(61, 53, 51, 0.10);
    --shadow-lg: 0 12px 40px rgba(61, 53, 51, 0.14);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    overflow-x: hidden;
    background: var(--cream);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 核心布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 28px;
}

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

.section:nth-child(even) {
    background: var(--warm-gray);
}

/* 导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(250, 247, 242, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 28px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    transition: var(--transition);
}

.logo:hover {
    color: var(--terracotta);
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--terracotta), var(--terracotta-light));
    color: #fff;
    font-weight: 800;
    letter-spacing: 1px;
    box-shadow: 0 2px 8px rgba(193, 125, 96, 0.3);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.main-nav li {
    position: relative;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition);
    letter-spacing: 0.2px;
}

.main-nav a:hover {
    color: var(--terracotta);
    background: rgba(193, 125, 96, 0.06);
}

.main-nav a.nav-active {
    color: var(--terracotta);
    background: rgba(193, 125, 96, 0.08);
    font-weight: 600;
}

.nav-cta {
    padding: 9px 22px !important;
    border-radius: 22px !important;
    color: #fff !important;
    font-weight: 600 !important;
    background: var(--sage) !important;
    letter-spacing: 0.3px !important;
    box-shadow: 0 2px 10px rgba(125, 155, 118, 0.3);
    transition: var(--transition) !important;
}

.nav-cta:hover {
    background: var(--sage-dark) !important;
    box-shadow: 0 4px 16px rgba(125, 155, 118, 0.4) !important;
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
    font-size: 1.4rem;
}

/* Hero */
.hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    background: linear-gradient(170deg, #faf7f2 0%, #f5efe6 40%, #faf7f2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(125, 155, 118, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -60px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(193, 125, 96, 0.07) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    width: 100%;
}

.hero-content {
    max-width: 720px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 5px 16px;
    border-radius: 20px;
    margin-bottom: 18px;
    background: rgba(193, 125, 96, 0.1);
    color: var(--terracotta);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.18;
    margin-bottom: 22px;
    font-weight: 800;
    letter-spacing: -0.6px;
    color: var(--text-primary);
}

.hero h1 .highlight {
    color: var(--sage);
    position: relative;
    display: inline-block;
}

.hero h1 .highlight::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(125, 155, 118, 0.18);
    border-radius: 4px;
    z-index: -1;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.hero-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: rotate(0.5deg);
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--white);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image:hover {
    transform: rotate(0deg) translateY(-4px);
    box-shadow: 0 18px 48px rgba(61, 53, 51, 0.18);
}

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

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 24px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.btn-primary {
    color: #fff;
    background: var(--sage);
    box-shadow: 0 3px 14px rgba(125, 155, 118, 0.3);
}

.btn-primary:hover {
    background: var(--sage-dark);
    box-shadow: 0 6px 20px rgba(125, 155, 118, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1.8px solid var(--text-secondary);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--terracotta);
    color: var(--terracotta);
    background: rgba(193, 125, 96, 0.04);
    transform: translateY(-2px);
}

/* 标签/标题 */
.section-label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    margin-bottom: 14px;
    color: var(--terracotta);
    text-transform: uppercase;
    position: relative;
    padding-left: 28px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 2px;
    background: var(--terracotta);
    border-radius: 1px;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: -0.4px;
    color: var(--text-primary);
    line-height: 1.25;
}

.section-desc {
    max-width: 600px;
    color: var(--text-secondary);
    margin-bottom: 44px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* 卡片网格 */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 24px;
}

.category-card {
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    border: 1px solid var(--border);
    background: var(--white);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.4rem;
    background: var(--warm-gray);
    color: var(--sage);
    transition: var(--transition);
}

.category-card:hover .card-icon {
    background: var(--sage);
    color: #fff;
    box-shadow: 0 4px 14px rgba(125, 155, 118, 0.3);
}

.category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.category-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.6;
}

.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--sage);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.card-link:hover {
    color: var(--sage-dark);
    gap: 10px;
}

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

.feature-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
}

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

.feature-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.feature-text p {
    color: var(--text-secondary);
    margin-bottom: 18px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    margin-top: 8px;
}

.feature-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: #fff;
    background: var(--sage);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
}

/* 数据条 */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-item {
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--white);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--terracotta);
    letter-spacing: -0.5px;
    line-height: 1;
}

.stat-number .suffix {
    font-size: 1.4rem;
    color: var(--sage);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 0.5px;
}

/* 内容墙 */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 24px;
}

.content-wall-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--white);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.content-wall-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.content-wall-body {
    padding: 22px 20px;
    flex: 1;
}

.content-wall-body h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.content-wall-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.content-wall-body .tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
    background: rgba(125, 155, 118, 0.1);
    color: var(--sage);
    letter-spacing: 0.5px;
}

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

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: var(--white);
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--sage);
}

.faq-item .faq-question {
    padding: 18px 22px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.faq-item .faq-question .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--warm-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: var(--transition);
    flex-shrink: 0;
    color: var(--sage);
    font-weight: 700;
}

.faq-item .faq-answer {
    padding: 0 22px 18px;
    display: none;
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.7;
}

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

.faq-item.open .faq-question {
    color: var(--sage);
}

.faq-item.open .faq-icon {
    background: var(--sage);
    color: #fff;
    transform: rotate(45deg);
}

/* CTA横幅 */
.cta-banner {
    padding: 60px 28px;
    text-align: center;
    border-radius: var(--radius-xl);
    color: #fff;
    background: linear-gradient(135deg, #6b8a63 0%, var(--sage) 30%, #8db386 60%, #6b8a63 100%);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -40px;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: -30px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.cta-banner h2 {
    color: #fff;
    font-size: 2rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    margin: 12px 0 28px;
    position: relative;
    z-index: 1;
    font-size: 1.05rem;
}

.cta-banner .btn-primary {
    background: #fff;
    color: var(--sage-dark);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    position: relative;
    z-index: 1;
    font-weight: 700;
}

.cta-banner .btn-primary:hover {
    background: var(--cream);
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.16);
    transform: translateY(-2px);
}

/* 页脚 */
.site-footer {
    padding: 60px 0 28px;
    background: #3d3533;
    color: rgba(255, 255, 255, 0.8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 36px;
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 14px;
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.7;
    line-height: 1.7;
    max-width: 280px;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 0.3px;
}

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

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

.footer-col ul li a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--terracotta-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 0;
    padding-top: 22px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* 工具类 */
.text-accent {
    color: var(--terracotta);
}

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

.seo-description {
    max-width: 620px;
    margin: 0 auto 52px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

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

/* 装饰分隔线 */
.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--terracotta), var(--sage));
    border-radius: 2px;
    margin: 0 auto 40px;
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

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

    .feature-block {
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

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

    .hero {
        min-height: auto;
        padding: 100px 0 50px;
    }

    .hero h1 {
        font-size: 2.1rem;
    }

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

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

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

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

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

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

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

    .main-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: rgba(250, 247, 242, 0.97);
        backdrop-filter: blur(18px);
        padding: 20px 28px;
        border-bottom: 1px solid var(--border);
        gap: 6px;
        box-shadow: var(--shadow-md);
    }

    .main-nav.open a {
        padding: 12px 16px;
        width: 100%;
        border-radius: 8px;
    }

    .nav-cta {
        text-align: center;
        justify-content: center;
        margin-top: 6px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 18px;
    }

    .header-inner {
        padding: 0 18px;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

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

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

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

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

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

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

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

    .feature-list li {
        font-size: 0.88rem;
    }
}

/* 无障碍与焦点样式 */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--sage);
    outline-offset: 3px;
    border-radius: 4px;
}

/* 打印样式 */
@media print {
    .site-header {
        position: static;
    }

    .hero {
        min-height: auto;
    }

    .cta-banner {
        background: var(--sage) !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}