/* ============================================
   育见未来心理咨询 - 青少年心理咨询官网
   样式表 - 参考 ai.ingcare.com 布局结构
   ============================================ */

/* ========== CSS 变量 / 主题色彩 ========== */
:root {
    /* 主色调 - 育见未来心理咨询青绿色 */
    --color-primary: #1A9C9C;
    --color-primary-dark: #158585;
    --color-primary-light: #E8F6F6;

    /* 辅助色 */
    --color-secondary: #FF8C42;
    --color-secondary-dark: #E6732F;
    --color-secondary-light: #FFF2EB;

    /* 强调色 */
    --color-accent: #FFB800;
    --color-accent-dark: #E6A600;

    /* 中性色 */
    --color-dark: #1A2B3C;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-border: #E8E8E8;
    --color-border-light: #F0F0F0;

    /* 背景 */
    --bg-white: #FFFFFF;
    --bg-light: #F7F9FA;
    --bg-warm: #FFF9F5;
    --bg-dark: #1A2B3C;
    --bg-teal: #E8F6F6;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 4px 20px rgba(26, 156, 156, 0.3);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 999px;

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

    /* 容器宽度 */
    --container-max: 1200px;
    --container-narrow: 900px;
}

/* ========== 全局重置 ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

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

/* ========== 工具类 ========== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-light {
    background: var(--bg-light);
}

.section-warm {
    background: var(--bg-warm);
}

.section-dark {
    background: var(--bg-dark);
    color: #fff;
}

.section-teal {
    background: var(--bg-teal);
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 50px;
}

.section-label {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-dark .section-title {
    color: #fff;
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.section-dark .section-desc {
    color: rgba(255,255,255,0.8);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--color-secondary-dark);
}

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

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

.btn-outline-light {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.5);
}

.btn-outline-light:hover {
    background: rgba(255,255,255,0.1);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

/* ========== 顶部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    z-index: 1000;
    transition: var(--transition);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    justify-content: center;
    min-width: 0;
    flex-wrap: nowrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 24px 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.nav-item:hover .nav-arrow {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    padding: 10px;
    min-width: 220px;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    border: 1px solid var(--color-border-light);
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-link {
    display: block;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.dropdown-link:hover {
    background: var(--bg-light);
    color: var(--color-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
}

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

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* ========== Hero 区域 ========== */
.hero {
    position: relative;
    min-height: 620px;
    background: linear-gradient(135deg, #1A4B5C 0%, #1A9C9C 100%);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 130px 0 90px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-content {
    max-width: 760px;
    text-align: center;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    color: #fff;
    font-size: 14px;
    padding: 8px 18px;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 20px;
    opacity: 0.95;
}

.hero-desc {
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 32px;
    opacity: 0.9;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 760px;
    margin: 0 auto;
}

.hero-stat {
    text-align: center;
    padding: 20px;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.hero-stat-number {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 6px;
}

.hero-stat-label {
    font-size: 14px;
    opacity: 0.85;
}

/* ========== 核心业务 ========== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.business-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
}

.business-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.business-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 18px;
}

.business-card:nth-child(1) .business-icon { background: var(--color-primary-light); }
.business-card:nth-child(2) .business-icon { background: var(--color-secondary-light); }
.business-card:nth-child(3) .business-icon { background: #E8F4FD; }
.business-card:nth-child(4) .business-icon { background: #F5F0FF; }

.business-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.business-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.business-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.business-link:hover {
    gap: 8px;
}

/* ========== 课程/服务卡片网格 ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.card-link {
    display: block;
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.card-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.card-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.card-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
}

/* ========== 核心理念 ========== */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.philosophy-item {
    text-align: center;
    padding: 28px 16px;
    background: #fff;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
}

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

.philosophy-letter {
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 14px;
}

.philosophy-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.philosophy-desc {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========== 产品/工具 ========== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.product-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
}

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

.product-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.product-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    flex-shrink: 0;
}

.product-card:nth-child(1) .product-icon { background: var(--color-primary-light); }
.product-card:nth-child(2) .product-icon { background: var(--color-secondary-light); }
.product-card:nth-child(3) .product-icon { background: #E8F4FD; }
.product-card:nth-child(4) .product-icon { background: #F5F0FF; }

.product-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.product-subtitle {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 600;
}

.product-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 18px;
}

.product-stats {
    display: flex;
    gap: 24px;
}

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

.product-stat-number {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-dark);
}

.product-stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ========== 核心数据 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-number {
    font-size: 40px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
}

/* ========== 权威背书 ========== */
.backing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.backing-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.backing-card:hover {
    box-shadow: var(--shadow-md);
}

.backing-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 14px;
}

.backing-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.backing-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

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

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

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
    text-align: left;
}

.faq-icon {
    font-size: 20px;
    color: var(--color-primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 22px 18px;
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========== 资讯/文章列表 ========== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.article-card {
    display: block;
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

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

.article-thumb {
    height: 160px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 40px;
}

.article-body {
    padding: 20px;
}

.article-date {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.article-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.5;
    margin-bottom: 10px;
}

.article-excerpt {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========== CTA 区域 ========== */
.cta-section {
    background: var(--bg-dark);
    color: #fff;
    padding: 70px 0;
    text-align: center;
}

.cta-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
}

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

/* ========== 页脚 ========== */
.footer {
    background: #142230;
    color: rgba(255,255,255,0.8);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.65);
}

.footer-phone {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
    display: block;
}

.footer-column-title {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
}

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

.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.65);
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

.footer-bottom a {
    color: rgba(255,255,255,0.5);
    margin-left: 20px;
}

/* ========== 浮动按钮 ========== */
.float-buttons {
    position: fixed;
    right: 20px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    transition: var(--transition);
}

.float-btn:hover {
    transform: scale(1.1);
}

.float-btn-phone { background: var(--color-primary); }
.float-btn-form { background: var(--color-secondary); }
.float-btn-top { background: var(--color-dark); }

/* ========== 子页面通用 ========== */
.sub-hero {
    position: relative;
    background: linear-gradient(135deg, #1A4B5C 0%, #1A9C9C 100%);
    color: #fff;
    padding: 130px 0 60px;
    text-align: center;
}

.sub-hero-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.sub-hero-subtitle {
    font-size: 16px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 20px;
    opacity: 0.85;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb .current {
    color: #fff;
    font-weight: 600;
    opacity: 1;
}

.breadcrumb span {
    opacity: 0.7;
}

.hero-lead {
    font-size: 17px;
    line-height: 1.95;
    max-width: 780px;
    margin: 22px auto 0;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
}

/* ========== 长文章页面 (about/xianxia 风格) ========== */
.article-page {
    padding: 50px 0 80px;
}

.article-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
}

.article-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
    line-height: 1.3;
}

.article-meta {
    font-size: 14px;
    color: var(--color-text-muted);
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin: 48px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-primary-light);
}

.article-body h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--color-dark);
    margin: 28px 0 14px;
}

.article-body p {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 16px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 20px 24px;
    list-style: disc;
}

.article-body li {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 8px;
}

.article-body strong {
    color: var(--color-dark);
    font-weight: 700;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.info-table th,
.info-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 14px;
}

.info-table th {
    width: 160px;
    background: var(--bg-light);
    color: var(--color-dark);
    font-weight: 600;
    vertical-align: top;
}

.info-table td {
    color: var(--color-text);
    line-height: 1.7;
}

.info-table tr:last-child th,
.info-table tr:last-child td {
    border-bottom: none;
}

.case-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.case-table th,
.case-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 14px;
}

.case-table th {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 600;
}

.highlight-box {
    background: var(--bg-light);
    border-left: 4px solid var(--color-primary);
    padding: 20px 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 24px 0;
}

.highlight-box p {
    margin-bottom: 0;
}

/* ========== 文章内：关键要点 / FAQ（AI 收录友好，内容常显可被抓取） ========== */
.key-takeaways {
    background: linear-gradient(135deg, #EAF6F6 0%, #F4FBFB 100%);
    border: 1px solid var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 22px 26px;
    margin: 8px 0 36px;
}
.key-takeaways h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.key-takeaways h3::before {
    content: "★";
    color: var(--color-primary);
}
.key-takeaways ul {
    margin: 0;
    list-style: none;
}
.key-takeaways li {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.85;
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}
.key-takeaways li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

.article-faq {
    margin: 44px 0 8px;
}
.article-faq-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 6px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-primary-light);
}
.article-faq-sub {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}
.article-faq-item {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    margin-bottom: 14px;
}
.article-faq-q {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
    display: flex;
    gap: 10px;
    align-items: baseline;
}
.article-faq-q .q-tag {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
}
.article-faq-a {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.9;
}
.article-faq-a p {
    margin-bottom: 10px;
}
.article-faq-a p:last-child {
    margin-bottom: 0;
}

/* ========== 知识库页面 ========== */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.knowledge-card {
    display: block;
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
}

.knowledge-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.knowledge-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.knowledge-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.knowledge-count {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.knowledge-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.knowledge-tag {
    font-size: 12px;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

/* ========== 云课堂/课程页面 ========== */
.course-hero {
    background: linear-gradient(135deg, #1A4B5C 0%, #1A9C9C 100%);
    color: #fff;
    padding: 130px 600px 70px;
}

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

.course-hero-title {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.course-hero-desc {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 28px;
    opacity: 0.9;
}

.course-hero-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 28px;
}

.course-hero-stat {
    text-align: center;
}

.course-hero-stat-number {
    font-size: 28px;
    font-weight: 700;
}

.course-hero-stat-label {
    font-size: 13px;
    opacity: 0.85;
}

.course-hero-image {
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    backdrop-filter: blur(10px);
}

.course-section {
    padding: 60px 0;
}

.course-section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 24px;
    text-align: center;
}

.course-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.course-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.course-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.course-card-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-dark);
}

.course-card-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ========== 表单 ========== */
.form-section {
    max-width: 720px;
    margin: 0 auto;
    padding: 50px 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 156, 156, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-note {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 16px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .business-grid,
    .philosophy-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .product-grid,
    .course-hero-inner {
        grid-template-columns: 1fr;
    }

    .course-hero-image {
        height: 240px;
    }

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

@media (max-width: 768px) {
    .header {
        height: 64px;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 16px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transform: translateY(-150%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: 14px 12px;
        border-bottom: 1px solid var(--color-border-light);
        justify-content: space-between;
    }

    .dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        padding: 0 0 0 16px;
        min-width: auto;
        display: none;
    }

    .nav-item.active .dropdown {
        display: block;
    }

    .dropdown-link {
        padding: 10px 12px;
    }

    .header-phone {
        display: none;
    }

    .hero {
        padding: 110px 0 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .hero-stat-number {
        font-size: 24px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .business-grid,
    .cards-grid,
    .article-grid,
    .knowledge-grid,
    .backing-grid,
    .product-grid,
    .philosophy-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        gap: 30px;
    }

    .stat-number {
        font-size: 32px;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .article-header h1 {
        font-size: 26px;
    }

    .article-body h2 {
        font-size: 20px;
    }

    .course-hero-title,
    .sub-hero-title {
        font-size: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .float-buttons {
        right: 12px;
        bottom: 80px;
    }

    .float-btn {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
}

/* ========== 可访问性 ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========== 动画类 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== 知识库卡片描述 ========== */
.knowledge-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

/* ========== 面包屑（位于 sub-hero 内） ========== */
.sub-hero .breadcrumb {
    justify-content: center;
}
.sub-hero .breadcrumb a {
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
}
.sub-hero .breadcrumb a:hover {
    text-decoration: underline;
}
.sub-hero .breadcrumb span {
    color: rgba(255, 255, 255, 0.7);
}

/* ========== FAQ 分类标题 ========== */
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.faq-category-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-dark);
    margin: 44px 0 18px;
    padding-left: 14px;
    border-left: 4px solid var(--color-primary);
}
.faq-category-title:first-child {
    margin-top: 0;
}

/* ========== 咨询流程步骤 ========== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.process-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    text-align: center;
    transition: var(--transition);
}
.process-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.process-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.process-card h3 {
    font-size: 17px;
    color: var(--color-dark);
    margin-bottom: 10px;
}
.process-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== 文档预览 / 下载（白皮书、家长手册） ========== */
.pdf-section {
    background: var(--bg-light, #f7f8fa);
    padding: 50px 0;
}
.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    margin: 18px 0 26px;
}
.doc-meta-item {
    font-size: 14px;
    color: var(--color-text-light);
}
.doc-meta-item strong {
    color: var(--color-dark);
    margin-right: 6px;
}
.pdf-preview-wrap {
    background: #fff;
    border: 1px solid var(--color-border-light, #e8ebf0);
    border-radius: var(--radius-lg, 16px);
    box-shadow: var(--shadow-md, 0 10px 30px rgba(20, 30, 60, 0.08));
    overflow: hidden;
}
.pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border-light, #e8ebf0);
    background: #fafbfc;
    flex-wrap: wrap;
}
.pdf-toolbar-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
}
.pdf-toolbar-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.pdf-preview {
    width: 100%;
    height: 78vh;
    min-height: 520px;
    border: 0;
    display: block;
    background: #525659;
}
.download-box {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    background: linear-gradient(135deg, rgba(255,179,71,0.12), rgba(232,133,75,0.12));
    border: 1px solid rgba(232,133,75,0.35);
    border-radius: var(--radius-md, 12px);
    padding: 20px 24px;
    margin-top: 24px;
}
.download-box-icon {
    font-size: 34px;
}
.download-box-text strong {
    display: block;
    font-size: 16px;
    color: var(--color-dark);
    margin-bottom: 4px;
}
.download-box-text span {
    font-size: 13px;
    color: var(--color-text-light);
}

.pdf-fallback-card {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    background: linear-gradient(135deg, rgba(255,179,71,0.12), rgba(232,133,75,0.12));
    border: 1px solid rgba(232,133,75,0.35);
    border-radius: var(--radius-md, 12px);
    padding: 20px 24px;
    margin-top: 24px;
}
.pdf-fallback-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 24px;
    background: linear-gradient(135deg, #FFB347, #E8854B);
    color: #fff;
    flex-shrink: 0;
}
.pdf-fallback-text {
    flex: 1;
    min-width: 220px;
}
.pdf-fallback-text strong {
    display: block;
    font-size: 16px;
    color: var(--color-dark);
    margin-bottom: 4px;
}
.pdf-fallback-text span {
    font-size: 13px;
    color: var(--color-text-light);
}

/* ========== 文章详情页附加排版 ========== */
.article-cover {
    width: 100%;
    height: 220px;
    border-radius: var(--radius-md, 12px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 64px;
    margin-bottom: 28px;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 22px 0;
}
.article-tag {
    font-size: 13px;
    color: var(--color-primary);
    background: rgba(255,179,71,0.12);
    border: 1px solid rgba(255,179,71,0.3);
    padding: 4px 12px;
    border-radius: 999px;
}
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-primary);
    margin-bottom: 18px;
}
.back-link:hover { text-decoration: underline; }

@media (max-width: 768px) {
    .pdf-preview { height: 60vh; min-height: 420px; }
    .pdf-toolbar { flex-direction: column; align-items: flex-start; }
}

/* ========== 锚点滚动偏移（防止固定导航遮挡） ========== */
*[id] {
    scroll-margin-top: 90px;
}

@media (max-width: 768px) {
    *[id] {
        scroll-margin-top: 70px;
    }
}

/* ========== 可点击区域扩大 ========== */
@media (pointer: coarse) {
    .nav-link,
    .dropdown-link,
    .btn,
    .faq-question,
    .float-btn {
        min-height: 44px;
    }
}