/* ============================================================
   智朵 SaaS 官网样式
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #4DBA87;
    --primary-dark: #3aa06e;
    --primary-light: #6fd0a0;
    --primary-bg: #f0faf5;
    --primary-bg-2: #e8f7ef;

    --text-1: #1a1f2e;
    --text-2: #4a5568;
    --text-3: #718096;
    --text-4: #a0aec0;

    --bg-1: #ffffff;
    --bg-2: #f7fafc;
    --bg-3: #edf2f7;

    --border: #e2e8f0;
    --border-light: #edf2f7;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --container: 1200px;
    --nav-height: 72px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
        Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-1);
    background: var(--bg-1);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

img, svg {
    max-width: 100%;
    display: block;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ---------- 通用布局 ---------- */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-1);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-3);
    max-width: 640px;
    margin: 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 44px;
    padding: 0 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(77, 186, 135, 0.35);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(77, 186, 135, 0.45);
}

.btn-ghost {
    color: var(--text-1);
    background: transparent;
    border: 1px solid transparent;
}

.btn-ghost:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-lg {
    height: 54px;
    padding: 0 32px;
    font-size: 16px;
}

/* ---------- 导航栏 ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--border-light);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-1);
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.logo-sub {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.5px;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    display: block;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-2);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: var(--primary-bg);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 20px;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-1);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.mobile-mask {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}

.mobile-mask.show {
    display: block;
    opacity: 1;
}

/* ---------- Hero 区 ---------- */
.hero {
    position: relative;
    padding: calc(var(--nav-height) + 100px) 0 120px;
    background: linear-gradient(135deg, #f0faf5 0%, #ffffff 50%, #f0f7ff 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(77, 186, 135, 0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -300px;
    left: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(77, 186, 135, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--primary-dark);
    background: var(--primary-bg-2);
    padding: 8px 16px;
    border-radius: 999px;
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-1);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-3);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.hero-stat-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-1);
}

.hero-stat-num .unit {
    font-size: 16px;
    color: var(--text-3);
    font-weight: 400;
    margin-left: 2px;
}

.hero-stat-label {
    font-size: 14px;
    color: var(--text-3);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
}

.hero-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 24px;
    position: relative;
}

.hero-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.hero-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-1);
}

.hero-card-badge {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--primary-bg);
    color: var(--primary-dark);
    border-radius: 999px;
    font-weight: 500;
}

.hero-card-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.hero-card-item:hover {
    background: var(--bg-2);
}

.hero-card-item + .hero-card-item {
    margin-top: 4px;
}

.hero-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--primary-bg);
    color: var(--primary);
}

.hero-card-icon svg {
    width: 22px;
    height: 22px;
}

.hero-card-item-info {
    flex: 1;
    min-width: 0;
}

.hero-card-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-1);
    margin-bottom: 4px;
}

.hero-card-item-desc {
    font-size: 13px;
    color: var(--text-3);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hero-card-item-status {
    font-size: 13px;
    font-weight: 500;
    flex-shrink: 0;
}

.status-success { color: var(--primary); }
.status-warning { color: #f59e0b; }
.status-pending { color: var(--text-4); }

/* ---------- 功能卡片 ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--primary-bg);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.05);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.7;
}

.feature-card ul {
    margin-top: 16px;
}

.feature-card li {
    font-size: 14px;
    color: var(--text-2);
    padding: 6px 0 6px 20px;
    position: relative;
}

.feature-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

/* ---------- 平台集成 ---------- */
.platforms {
    background: var(--bg-2);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.platform-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.platform-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.platform-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.platform-logo.meituan { background: linear-gradient(135deg, #ffd100, #ffb800); color: #333; }
.platform-logo.sftc { background: linear-gradient(135deg, #e53935, #c62828); }
.platform-logo.eleme { background: linear-gradient(135deg, #0097ff, #0077cc); }
.platform-logo.dada { background: linear-gradient(135deg, #ff6b35, #e55a2b); }

.platform-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.platform-card p {
    font-size: 14px;
    color: var(--text-3);
}

/* ---------- 适用场景 ---------- */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scenario-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-2);
    transition: var(--transition);
}

.scenario-card:hover {
    background: var(--primary-bg);
    transform: translateY(-4px);
}

.scenario-card.pending {
    opacity: 0.6;
    cursor: default;
}

.scenario-card.pending:hover {
    background: var(--bg-2);
    transform: none;
}

.scenario-badge {
    display: inline-block;
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 999px;
    background: var(--bg-3);
    color: var(--text-4);
    margin-top: 8px;
    font-weight: 500;
}

.scenario-card:not(.pending) .scenario-badge {
    background: var(--primary-bg);
    color: var(--primary-dark);
}

.scenario-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.scenario-icon svg {
    width: 36px;
    height: 36px;
}

.scenario-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.scenario-card p {
    font-size: 14px;
    color: var(--text-3);
}

/* ---------- 数据亮点 ---------- */
.stats {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
}

.stats::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.stats-inner {
    position: relative;
    z-index: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item-num {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 12px;
}

.stat-item-num .unit {
    font-size: 24px;
    font-weight: 500;
    margin-left: 4px;
    opacity: 0.8;
}

.stat-item-label {
    font-size: 16px;
    opacity: 0.85;
}

/* ---------- 定价 ---------- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    align-items: stretch;
}

.pricing-card {
    background: #fff;
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 10px 40px rgba(77, 186, 135, 0.2);
    transform: translateY(-8px);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: 16px;
    right: -28px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 32px;
    transform: rotate(45deg);
    letter-spacing: 1px;
}

.pricing-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-3);
    margin-bottom: 28px;
    min-height: 42px;
}

.pricing-price {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
}

.pricing-price-num {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-1);
    line-height: 1;
}

.pricing-price-num .currency {
    font-size: 24px;
    font-weight: 500;
    vertical-align: super;
    margin-right: 2px;
}

.pricing-price-num .period {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-3);
    margin-left: 4px;
}

.pricing-price-note {
    font-size: 13px;
    color: var(--text-4);
    margin-top: 8px;
}

.pricing-features {
    flex: 1;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-2);
}

.pricing-features .check {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.pricing-features .cross {
    color: var(--text-4);
    flex-shrink: 0;
    margin-top: 2px;
}

.pricing-btn {
    width: 100%;
}

/* 定价对比表 */
.compare-section {
    margin-top: 80px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.compare-table th,
.compare-table td {
    padding: 18px 24px;
    text-align: center;
    border-bottom: 1px solid var(--border-light);
}

.compare-table th {
    background: var(--bg-2);
    font-weight: 600;
    color: var(--text-1);
    font-size: 15px;
}

.compare-table th:first-child {
    text-align: left;
    width: 200px;
}

.compare-table td:first-child {
    text-align: left;
    font-weight: 500;
    color: var(--text-2);
}

.compare-table .check { color: var(--primary); }
.compare-table .cross { color: var(--text-4); }
.compare-table tr:last-child td { border-bottom: none; }

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

.faq-item {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-1);
    font-size: 16px;
}

.faq-question::after {
    content: '+';
    font-size: 20px;
    color: var(--text-3);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.8;
}

/* ---------- CTA 区块 ---------- */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, #2d8f65 100%);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.cta-inner {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.cta-section .btn-primary:hover {
    background: #f7fafc;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-outline {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
}

/* ---------- 页脚 ---------- */
.site-footer {
    background: #1a1f2e;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-brand .logo-text {
    color: #fff;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.7;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col a:hover {
    color: var(--primary-light);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.contact-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--primary-light);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    opacity: 0.6;
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-bottom a:hover {
    color: var(--primary-light);
    opacity: 1;
}

/* ---------- 子页面通用 ---------- */
.page-hero {
    padding: calc(var(--nav-height) + 80px) 0 80px;
    text-align: center;
    background: linear-gradient(135deg, #f0faf5 0%, #ffffff 50%, #f0f7ff 100%);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(77, 186, 135, 0.1) 0%, transparent 70%);
}

.page-hero-inner {
    position: relative;
    z-index: 1;
}

.page-hero-tag {
    display: inline-block;
    font-size: 14px;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 20px;
    font-weight: 500;
}

.page-hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-1);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.page-hero p {
    font-size: 18px;
    color: var(--text-3);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ---------- 功能详情页 ---------- */
.feature-detail {
    padding: 100px 0;
}

.feature-detail-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    padding: 80px 0;
}

.feature-detail-row + .feature-detail-row {
    border-top: 1px solid var(--border-light);
}

.feature-detail-row.reverse .feature-detail-text {
    order: 2;
}

.feature-detail-row.reverse .feature-detail-visual {
    order: 1;
}

.feature-detail-tag {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
    font-weight: 500;
}

.feature-detail-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 20px;
    line-height: 1.3;
}

.feature-detail-text p {
    font-size: 16px;
    color: var(--text-3);
    line-height: 1.8;
    margin-bottom: 24px;
}

.feature-detail-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.feature-detail-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-2);
}

.feature-detail-list .check {
    color: var(--primary);
    flex-shrink: 0;
}

.feature-detail-visual {
    background: var(--bg-2);
    border-radius: var(--radius-lg);
    padding: 40px;
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-mock {
    width: 100%;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 24px;
}

.visual-mock-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 20px;
}

.visual-mock-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ff5f57;
}
.visual-mock-dot:nth-child(2) { background: #febc2e; }
.visual-mock-dot:nth-child(3) { background: #28c840; }

.visual-mock-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.visual-mock-bar-item {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-2);
    position: relative;
    overflow: hidden;
}

.visual-mock-bar-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background: var(--primary);
    border-radius: 4px;
}

.visual-mock-bar-item:nth-child(1)::after { width: 85%; }
.visual-mock-bar-item:nth-child(2)::after { width: 65%; }
.visual-mock-bar-item:nth-child(3)::after { width: 92%; }

.visual-mock-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

.visual-mock-row:last-child { border-bottom: none; }

.visual-mock-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.visual-mock-icon svg {
    width: 18px;
    height: 18px;
}

.visual-mock-text { flex: 1; }
.visual-mock-text-name { font-size: 13px; font-weight: 500; color: var(--text-1); }
.visual-mock-text-desc { font-size: 12px; color: var(--text-3); margin-top: 2px; }

.visual-mock-status {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--primary-bg);
    color: var(--primary-dark);
    font-weight: 500;
}

/* 技术架构 */
.tech-arch {
    background: var(--bg-2);
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.arch-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
}

.arch-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.arch-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.arch-card h4::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: 2px;
}

.arch-card p {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.7;
}

.arch-card ul {
    margin-top: 12px;
}

.arch-card li {
    font-size: 13px;
    color: var(--text-2);
    padding: 4px 0 4px 16px;
    position: relative;
}

.arch-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
}

/* ---------- 关于我们 ---------- */
.about-intro {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 24px;
    line-height: 1.3;
}

.about-intro-text p {
    font-size: 16px;
    color: var(--text-3);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-intro-visual {
    background: linear-gradient(135deg, var(--primary-bg), #fff);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    border: 1px solid var(--border-light);
}

.about-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.about-stat-item {
    text-align: center;
    padding: 24px;
}

.about-stat-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}

.about-stat-num .unit {
    font-size: 18px;
    font-weight: 500;
    margin-left: 2px;
}

.about-stat-label {
    font-size: 14px;
    color: var(--text-3);
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -40px;
    top: 4px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-dot::after {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}

.timeline-year {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 15px;
    color: var(--text-3);
    line-height: 1.7;
}

/* 核心优势 */
.advantages {
    background: var(--bg-2);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-icon svg {
    width: 32px;
    height: 32px;
}

.advantage-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.7;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-card {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-info-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateX(4px);
}

.contact-info-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--primary-bg);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon svg {
    width: 28px;
    height: 28px;
}

.contact-info-text h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.contact-info-text p {
    font-size: 15px;
    color: var(--text-3);
    line-height: 1.6;
}

.contact-map {
    background: var(--bg-2);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.contact-map-placeholder {
    height: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-3);
    background: linear-gradient(135deg, var(--bg-2), #fff);
}

.contact-map-placeholder svg {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: 16px;
    opacity: 0.6;
}

.contact-map-placeholder p {
    font-size: 16px;
}

/* ---------- 滚动动画 ---------- */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
    :root {
        --container: 960px;
    }

    .hero h1 { font-size: 42px; }
    .section-title { font-size: 34px; }
    .page-hero h1 { font-size: 40px; }

    .features-grid { grid-template-columns: repeat(3, 1fr); }
    .platforms-grid { grid-template-columns: repeat(4, 1fr); }
    .scenarios-grid { grid-template-columns: repeat(4, 1fr); }
    .pricing-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }
    .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .arch-grid { grid-template-columns: repeat(3, 1fr); }

    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 30px; }
}

@media (max-width: 960px) {
    :root {
        --nav-height: 64px;
    }

    .section { padding: 70px 0; }
    .section-title { font-size: 28px; }
    .section-desc { font-size: 16px; }

    .main-nav { display: none; }
    .nav-actions { display: none; }
    .menu-toggle { display: flex; }

    .main-nav.show {
        display: block;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px;
        box-shadow: var(--shadow-md);
        z-index: 1000;
        max-height: calc(100vh - var(--nav-height));
        overflow-y: auto;
    }

    .main-nav.show ul {
        flex-direction: column;
        gap: 4px;
    }

    .main-nav.show a {
        padding: 14px 16px;
        font-size: 16px;
    }

    .main-nav.show + .nav-actions {
        display: flex;
    }

    .hero {
        padding: calc(var(--nav-height) + 60px) 0 80px;
    }

    .hero-inner {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }

    .hero h1 { font-size: 36px; }
    .hero-desc { margin-left: auto; margin-right: auto; font-size: 16px; }
    .hero-actions { justify-content: center; flex-wrap: wrap; }
    .hero-stats { justify-content: center; flex-wrap: wrap; gap: 30px; }

    .hero-visual { order: -1; max-width: 400px; margin: 0 auto; }

    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .platforms-grid { grid-template-columns: repeat(2, 1fr); }
    .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 700px; margin: 0 auto; }
    .pricing-card.featured { transform: none; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .stat-item-num { font-size: 36px; }

    .page-hero { padding: calc(var(--nav-height) + 50px) 0 60px; }
    .page-hero h1 { font-size: 32px; }
    .page-hero p { font-size: 16px; }

    .feature-detail { padding: 60px 0; }
    .feature-detail-row {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 50px 0;
    }
    .feature-detail-row.reverse .feature-detail-text { order: 1; }
    .feature-detail-row.reverse .feature-detail-visual { order: 2; }
    .feature-detail-text h2 { font-size: 28px; }

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

    .about-intro {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-intro-text h2 { font-size: 28px; }

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

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .footer-brand { grid-column: 1 / -1; }

    .cta-title { font-size: 28px; }
    .cta-desc { font-size: 16px; }
}

@media (max-width: 600px) {
    .container { padding: 0 16px; }
    .section { padding: 50px 0; }
    .section-header { margin-bottom: 40px; }
    .section-title { font-size: 24px; }

    .hero h1 { font-size: 28px; }
    .hero-stats { gap: 20px; }
    .hero-stat-num { font-size: 22px; }

    .features-grid { grid-template-columns: 1fr; }
    .platforms-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .platform-card { padding: 24px 16px; }
    .scenarios-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .scenario-card { padding: 28px 16px; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .stat-item-num { font-size: 28px; }
    .stat-item-label { font-size: 14px; }

    .feature-card { padding: 28px 24px; }

    .compare-table th,
    .compare-table td {
        padding: 12px 14px;
        font-size: 13px;
    }
    .compare-table th:first-child,
    .compare-table td:first-child {
        width: 100px;
        min-width: 100px;
    }

    .page-hero h1 { font-size: 26px; }
    .feature-detail-text h2 { font-size: 24px; }
    .feature-detail-list { grid-template-columns: 1fr; }

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

    .contact-info-card { padding: 20px; }
    .contact-map-placeholder { height: 280px; }

    .cta-actions { flex-direction: column; }
    .cta-actions .btn { width: 100%; }

    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; gap: 8px; }

    .btn-lg { height: 48px; padding: 0 24px; font-size: 15px; }
}