/* ================================
   上海犬迷训犬基地 - 全局样式表
   移动优先 · 圆润可爱 · 专业可信
   ================================ */

/* ===== CSS变量 ===== */
:root {
    --primary: #1e3a5f;
    --primary-light: #2d5a8a;
    --primary-dark: #142841;
    --accent: #f07d3d;
    --accent-light: #f9a062;
    --accent-dark: #d4661e;
    --accent-soft: #fef3ec;
    --bg-cream: #faf6f0;
    --bg-light: #f5f8fb;
    --bg-gray: #eef2f6;
    --bg-warm: #fdf8f3;
    --text-dark: #1a2332;
    --text-body: #4a5568;
    --text-light: #8a96a8;
    --white: #ffffff;
    --success: #2d9e6f;
    --success-soft: #e8f8f0;
    --border: #e8ecf0;
    --border-soft: #f0f3f7;
    --shadow-sm: 0 2px 12px rgba(30, 58, 95, 0.06);
    --shadow-md: 0 6px 28px rgba(30, 58, 95, 0.10);
    --shadow-lg: 0 12px 48px rgba(30, 58, 95, 0.14);
    --shadow-accent: 0 6px 20px rgba(240, 125, 61, 0.30);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --header-h: 64px;
    --bottom-nav-h: 60px;
}

/* ===== 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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    color: var(--text-body);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--accent);
}

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

ul, ol {
    list-style: none;
}

/* ===== 通用容器 ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 16px;
}

.section {
    padding: 48px 0;
}

.section-sm {
    padding: 32px 0;
}

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

.bg-gray {
    background: var(--bg-gray);
}

.bg-cream {
    background: var(--bg-cream);
}

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

.bg-primary {
    background: var(--primary);
    color: var(--white);
}

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

/* ===== 标题 ===== */
.section-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    line-height: 1.4;
}

.section-title span {
    color: var(--accent);
    position: relative;
}

.section-title span::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--accent-soft);
    z-index: -1;
    border-radius: 4px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 36px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.section-divider {
    width: 48px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 2px;
    margin: 0 auto 36px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    letter-spacing: 0.5px;
    min-height: 48px;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--white);
    box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(240, 125, 61, 0.40);
    color: var(--white);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: var(--white);
    color: var(--white);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.05rem;
    min-height: 52px;
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ===== 头部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.04);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 16px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--primary);
    white-space: nowrap;
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 3px 12px rgba(240,125,61,0.3);
}

.logo-icon svg {
    width: 22px;
    height: 22px;
    color: var(--white);
}

.logo-text {
    line-height: 1.2;
}

.logo-text small {
    display: block;
    font-size: 0.6rem;
    font-weight: 500;
    color: var(--text-light);
    letter-spacing: 1.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.92rem;
    position: relative;
    padding: 6px 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent);
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--white) !important;
    padding: 9px 18px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 0.88rem;
    box-shadow: var(--shadow-accent);
}

.nav-phone:hover {
    transform: translateY(-1px);
    color: var(--white) !important;
    box-shadow: 0 6px 24px rgba(240,125,61,0.4);
}

.nav-phone svg {
    width: 15px;
    height: 15px;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero区域 ===== */
.hero {
    min-height: 520px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding-top: var(--header-h);
    color: var(--white);
}

/* 爪印装饰背景 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(255,255,255,0.04) 0%, transparent 25%),
        radial-gradient(circle at 85% 70%, rgba(240,125,61,0.08) 0%, transparent 30%);
}

/* 爪印SVG装饰 */
.hero-paw-deco {
    position: absolute;
    opacity: 0.06;
    pointer-events: none;
}

.hero-paw-deco svg {
    width: 80px;
    height: 80px;
    fill: var(--white);
}

.hero-paw-1 { top: 15%; left: 5%; transform: rotate(-20deg); }
.hero-paw-2 { top: 60%; left: 8%; transform: rotate(15deg); }
.hero-paw-3 { top: 25%; right: 6%; transform: rotate(25deg); }
.hero-paw-4 { bottom: 10%; right: 12%; transform: rotate(-10deg); }

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 40px 16px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: center;
}

.hero-text h1 {
    font-size: 1.7rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 16px;
}

.hero-text h1 span {
    color: var(--accent-light);
}

.hero-text p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.hero-tag {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.hero-tag svg {
    width: 14px;
    height: 14px;
    color: var(--accent-light);
}

.hero-cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-align: center;
    width: 100%;
    max-width: 340px;
}

.hero-card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.hero-card-icon svg {
    width: 36px;
    height: 36px;
    color: var(--accent-light);
}

.hero-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.hero-card > p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 20px;
}

.hero-card-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.hero-card-stat {
    text-align: center;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius);
    padding: 12px 8px;
}

.hero-card-stat .num {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-light);
    display: block;
}

.hero-card-stat .label {
    font-size: 0.72rem;
    opacity: 0.8;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: calc(var(--header-h) + 16px) 0 12px;
    background: var(--bg-cream);
}

.breadcrumb nav {
    font-size: 0.85rem;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb span {
    margin: 0 6px;
}

/* ===== 服务卡片 ===== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-soft);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

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

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

.service-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-soft), var(--bg-warm));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.6rem;
}

.service-card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

.service-card h3 {
    font-size: 1.15rem;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 700;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.service-card ul {
    margin-bottom: 18px;
}

.service-card ul li {
    font-size: 0.86rem;
    color: var(--text-body);
    padding: 5px 0;
    padding-left: 24px;
    position: relative;
}

.service-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: var(--success-soft);
    border-radius: 50%;
}

.service-card ul li::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 5px;
    height: 8px;
    border-right: 2px solid var(--success);
    border-bottom: 2px solid var(--success);
}

.service-card .price {
    font-size: 0.82rem;
    color: var(--accent);
    font-weight: 700;
    padding: 10px 0 0;
    border-top: 1px dashed var(--border);
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.service-card .price svg {
    width: 14px;
    height: 14px;
}

/* ===== 服务区域 ===== */
.districts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 24px;
}

.district-tag {
    background: var(--white);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 12px 8px;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    cursor: default;
}

.district-tag:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.district-tag .icon {
    display: block;
    font-size: 1.3rem;
    margin-bottom: 4px;
}

/* ===== 优势区域 ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.advantage-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
    transition: var(--transition);
}

.advantage-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--accent-soft), var(--bg-warm));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.8rem;
}

.advantage-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
}

.advantage-item:hover .advantage-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    transform: scale(1.08);
}

.advantage-item:hover .advantage-icon svg {
    color: var(--white);
}

.advantage-item h3 {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 700;
}

.advantage-item p {
    font-size: 0.88rem;
    color: var(--text-body);
    line-height: 1.7;
}

/* ===== 训练流程 ===== */
.process-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    position: relative;
}

.process-item {
    text-align: center;
    position: relative;
    padding: 24px 16px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
}

.process-number {
    width: 44px;
    height: 44px;
    margin: 0 auto 14px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    box-shadow: var(--shadow-accent);
}

.process-item h3 {
    font-size: 1.02rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 700;
}

.process-item p {
    font-size: 0.86rem;
    color: var(--text-body);
    line-height: 1.7;
}

/* ===== 案例展示 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-soft);
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.case-card-img {
    height: 140px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    font-size: 2.5rem;
}

.case-card-img svg {
    width: 48px;
    height: 48px;
    color: rgba(255,255,255,0.5);
}

.case-card-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(to top, rgba(0,0,0,0.25), transparent);
}

.case-card-body {
    padding: 20px;
}

.case-card-body h3 {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 6px;
    font-weight: 700;
}

.case-card-body .case-meta {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.case-card-body p {
    font-size: 0.88rem;
    color: var(--text-body);
    line-height: 1.7;
}

.case-tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-dark);
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.76rem;
    font-weight: 600;
    margin-right: 5px;
    margin-bottom: 4px;
}

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

.faq-item {
    background: var(--white);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 16px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-toggle {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--accent-soft);
    border-radius: 50%;
    transition: var(--transition);
}

.faq-toggle svg {
    width: 14px;
    height: 14px;
    color: var(--accent);
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    background: var(--accent);
}

.faq-item.active .faq-toggle svg {
    color: var(--white);
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 20px;
}

.faq-item.active .faq-answer {
    max-height: 400px;
    padding: 0 20px 18px;
}

.faq-answer p {
    font-size: 0.9rem;
    color: var(--text-body);
    line-height: 1.8;
}

/* ===== CTA横幅 ===== */
.cta-banner {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: var(--white);
    text-align: center;
    padding: 48px 16px;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(240,125,61,0.12), transparent 70%);
    border-radius: 50%;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(240,125,61,0.08), transparent 70%);
    border-radius: 50%;
}

.cta-banner h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.cta-banner p {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 24px;
    position: relative;
    z-index: 2;
}

.cta-banner .btn {
    position: relative;
    z-index: 2;
}

.cta-phone {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-light);
    margin-top: 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 2;
}

.cta-phone svg {
    width: 24px;
    height: 24px;
}

.cta-address {
    font-size: 0.92rem;
    margin-top: 8px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    opacity: 0.85;
    position: relative;
    z-index: 2;
}

.cta-address svg {
    width: 16px;
    height: 16px;
}

/* ===== 关于我们 ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: center;
}

.about-text h2 {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-text h2 svg {
    width: 28px;
    height: 28px;
    color: var(--accent);
    flex-shrink: 0;
}

.about-text p {
    font-size: 0.95rem;
    color: var(--text-body);
    line-height: 1.9;
    margin-bottom: 14px;
}

.about-visual {
    display: flex;
    justify-content: center;
}

.about-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    width: 100%;
    max-width: 360px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(240,125,61,0.15), transparent 70%);
    border-radius: 50%;
}

.about-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    position: relative;
    z-index: 2;
}

.about-stat {
    text-align: center;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 14px 8px;
}

.about-stat .num {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-light);
    display: block;
}

.about-stat .label {
    font-size: 0.78rem;
    opacity: 0.85;
}

/* 团队卡片 */
.team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.team-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-soft);
    text-align: center;
}

.team-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.team-card-avatar {
    width: 80px;
    height: 80px;
    margin: 24px auto 16px;
    background: linear-gradient(135deg, var(--accent-soft), var(--bg-warm));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.team-card-avatar svg {
    width: 36px;
    height: 36px;
    color: var(--accent);
}

.team-card h3 {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.team-card .role {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
}

.team-card p {
    font-size: 0.86rem;
    color: var(--text-body);
    line-height: 1.7;
    padding: 0 20px 24px;
}

/* ===== 联系页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.contact-info-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-soft);
}

.contact-info-card h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-soft);
}

.contact-info-item:last-child {
    border-bottom: none;
}

.contact-info-icon {
    width: 42px;
    height: 42px;
    background: var(--accent-soft);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-icon svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

.contact-info-text h4 {
    font-size: 0.92rem;
    color: var(--text-dark);
    margin-bottom: 3px;
}

.contact-info-text p {
    font-size: 0.9rem;
    color: var(--text-body);
}

.contact-info-text .phone-link {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent);
}

/* 表单 */
.contact-form-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-soft);
}

.contact-form-card h3 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: var(--transition);
    -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(240,125,61,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 90px;
}

.form-message {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.88rem;
    margin-bottom: 18px;
    display: none;
}

.form-message.success {
    display: block;
    background: var(--success-soft);
    color: var(--success);
    border: 1px solid #b8e6d0;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 48px 0 0;
    /* 为移动端底部导航留空间 */
    margin-bottom: 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 32px;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 14px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-brand .footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.footer-brand .footer-tags span {
    font-size: 0.76rem;
    background: rgba(255,255,255,0.08);
    padding: 4px 10px;
    border-radius: 10px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 14px;
    font-weight: 700;
}

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

.footer-col ul li a {
    color: rgba(255,255,255,0.55);
    font-size: 0.88rem;
}

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

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.88rem;
}

.footer-contact-item .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.footer-contact-item .icon svg {
    width: 16px;
    height: 16px;
    color: var(--accent-light);
}

.footer-contact-item .phone-big {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--accent-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 16px 0;
    text-align: center;
    font-size: 0.82rem;
}

.footer-bottom a {
    color: rgba(255,255,255,0.4);
}

/* ===== 浮动电话按钮 ===== */
.float-contact {
    position: fixed;
    right: 16px;
    bottom: 76px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.float-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
}

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

.float-btn svg {
    width: 22px;
    height: 22px;
}

.float-btn.phone {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    animation: pulse 2s infinite;
}

.float-btn.top {
    background: var(--primary);
    opacity: 0;
    visibility: hidden;
}

.float-btn.top.visible {
    opacity: 1;
    visibility: visible;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(240,125,61,0.4), var(--shadow-md); }
    70% { box-shadow: 0 0 0 14px rgba(240,125,61,0), var(--shadow-md); }
    100% { box-shadow: 0 0 0 0 rgba(240,125,61,0), var(--shadow-md); }
}

/* ===== 移动端底部导航栏 ===== */
.mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--bottom-nav-h);
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 -2px 16px rgba(0,0,0,0.06);
    z-index: 998;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.mobile-bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--text-light);
    font-size: 0.68rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.mobile-bottom-nav-item svg {
    width: 22px;
    height: 22px;
    transition: var(--transition);
}

.mobile-bottom-nav-item.active {
    color: var(--accent);
}

.mobile-bottom-nav-item.active svg {
    transform: scale(1.1);
}

.mobile-bottom-nav-item.phone-btn {
    position: relative;
}

.mobile-bottom-nav-item.phone-btn .nav-phone-circle {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: -20px;
    box-shadow: var(--shadow-accent);
}

.mobile-bottom-nav-item.phone-btn .nav-phone-circle svg {
    width: 20px;
    height: 20px;
    color: var(--white);
}

.mobile-bottom-nav-item.phone-btn span {
    color: var(--accent);
    font-size: 0.62rem;
}

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

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

/* ===== AI概览区域统计 ===== */
.ai-stats-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 28px;
}

.ai-stat-item {
    text-align: center;
    min-width: 80px;
}

.ai-stat-item .ai-num {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
}

.ai-stat-item .ai-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== 平板响应式 ===== */
@media (min-width: 768px) {
    .container {
        padding: 0 24px;
    }

    .section {
        padding: 64px 0;
    }

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

    .section-subtitle {
        font-size: 1.05rem;
        margin-bottom: 40px;
    }

    .section-divider {
        width: 60px;
        margin-bottom: 40px;
    }

    .hero-content {
        grid-template-columns: 1.2fr 1fr;
        gap: 40px;
        padding: 60px 24px;
    }

    .hero-text h1 {
        font-size: 2.4rem;
    }

    .hero-text p {
        font-size: 1.1rem;
    }

    .hero-card {
        padding: 40px 32px;
    }

    .hero-card-stat .num {
        font-size: 1.8rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .service-card {
        padding: 32px 28px;
    }

    .districts-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .process-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .case-card-img {
        height: 180px;
    }

    .case-card-img svg {
        width: 56px;
        height: 56px;
    }

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

    .about-text h2 {
        font-size: 1.6rem;
    }

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

    .contact-info-card,
    .contact-form-card {
        padding: 36px 32px;
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
        gap: 36px;
    }

    .cta-banner {
        padding: 60px 24px;
    }

    .cta-banner h2 {
        font-size: 2rem;
    }

    .cta-phone {
        font-size: 2.2rem;
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .ai-stat-item .ai-num {
        font-size: 2rem;
    }
}

/* ===== 桌面响应式 ===== */
@media (min-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

    .hero-content {
        grid-template-columns: 1.2fr 1fr;
    }
}

/* ===== 隐藏移动端元素（桌面） ===== */
@media (min-width: 768px) {
    .mobile-bottom-nav {
        display: none;
    }

    .float-contact {
        bottom: 30px;
    }

    .footer {
        padding-bottom: 0;
    }
}

/* ===== 移动端微调（<768px） ===== */
@media (max-width: 767px) {
    /* 隐藏桌面导航菜单 */
    .nav-menu {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        width: 100%;
        text-align: left;
        padding: 14px 16px;
        border-radius: var(--radius);
        font-size: 0.95rem;
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
        display: none;
    }

    .nav-menu a.active {
        background: var(--accent-soft);
        color: var(--accent);
    }

    .nav-phone {
        justify-content: center;
        margin-top: 8px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 底部留出导航栏空间 */
    body {
        padding-bottom: var(--bottom-nav-h);
    }

    .footer {
        margin-bottom: 0;
    }

    .logo-text small {
        display: none;
    }

    .logo {
        font-size: 1.05rem;
    }

    .hero {
        min-height: auto;
        padding-top: calc(var(--header-h) + 8px);
    }

    .hero-content {
        padding: 24px 16px 32px;
    }

    .section {
        padding: 36px 0;
    }

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

    .btn {
        width: 100%;
    }

    .hero-cta .btn {
        width: auto;
        flex: 1;
    }

    .hero-cta .btn-outline {
        min-width: 120px;
    }

    .faq-question {
        font-size: 0.9rem;
        padding: 14px 16px;
    }

    .about-card {
        max-width: 320px;
    }
}

/* ===== 超小屏幕微调（<380px） ===== */
@media (max-width: 380px) {
    .hero-text h1 {
        font-size: 1.4rem;
    }

    .hero-tags {
        gap: 6px;
    }

    .hero-tag {
        font-size: 0.72rem;
        padding: 5px 10px;
    }

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

    .section-title {
        font-size: 1.2rem;
    }

    .cta-phone {
        font-size: 1.4rem;
    }
}