/* ==================== 基础变量 & 重置 ==================== */
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4fc3f7;
    --accent: #0d47a1;
    --bg-white: #ffffff;
    --bg-light: #f8fafd;
    --bg-soft: #f0f5ff;
    --text-primary: #1a1a2e;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;
    --border: #e8eaed;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.nav-link {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(26, 115, 232, 0.06);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

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

.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);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 50%, #f8fafd 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.06;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -150px;
    animation: floatShape 20s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--primary-light);
    bottom: -100px;
    left: -100px;
    animation: floatShape 15s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 60%;
    animation: floatShape 18s ease-in-out infinite;
    opacity: 0.04;
}

.shape-4 {
    width: 200px;
    height: 200px;
    background: var(--primary-light);
    top: 20%;
    left: 5%;
    animation: floatShape 12s ease-in-out infinite reverse;
    opacity: 0.05;
}

.shape-5 {
    width: 150px;
    height: 150px;
    background: var(--primary);
    top: 60%;
    right: 10%;
    border-radius: 30px;
    animation: floatShape 14s ease-in-out infinite;
    opacity: 0.04;
    transform: rotate(45deg);
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
    padding: 60px 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: rgba(26, 115, 232, 0.08);
    border: 1px solid rgba(26, 115, 232, 0.15);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    margin-right: 8px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.title-line {
    display: block;
}

.title-line.highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: rgba(26, 115, 232, 0.06);
    transform: translateY(-2px);
}

.btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

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

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.stat-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.stat-suffix {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

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

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--border);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
    0% { top: 6px; opacity: 1; }
    50% { top: 16px; opacity: 0.3; }
    100% { top: 6px; opacity: 1; }
}

/* ==================== Section 通用样式 ==================== */
section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(26, 115, 232, 0.08);
    color: var(--primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-title .accent {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==================== 关于我们 ==================== */
.about {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
}

.image-decor {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    top: 16px;
    left: 16px;
    opacity: 0.2;
    z-index: 0;
}

.image-main {
    position: relative;
    z-index: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-main svg {
    display: block;
}

.about-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 28px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-soft);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition);
}

.feature-item:hover {
    background: rgba(26, 115, 232, 0.08);
    transform: translateX(4px);
}

.feature-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* ==================== 核心服务 ==================== */
.services {
    background: var(--bg-light);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

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

.service-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-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);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.service-icon-wrap {
    margin-bottom: 20px;
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.08), rgba(79, 195, 247, 0.08));
    border-radius: var(--radius);
    color: var(--primary);
    transition: all var(--transition);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    transform: scale(1.1) rotate(-5deg);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    transition: all var(--transition);
}

.service-link:hover {
    gap: 12px;
}

/* ==================== 服务流程 ==================== */
.process {
    background: var(--bg-white);
}

.process-steps {
    max-width: 800px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    gap: 0;
    position: relative;
}

.process-step:last-child .step-line {
    display: none;
}

.step-number {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 70px;
}

.step-number span {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 50%;
    font-size: 15px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.step-line {
    width: 2px;
    flex: 1;
    background: linear-gradient(180deg, var(--primary), rgba(26, 115, 232, 0.1));
    margin: 8px 0;
    min-height: 60px;
}

.step-content {
    padding: 0 0 44px 32px;
    flex: 1;
}

.step-icon-box {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-soft);
    border-radius: var(--radius);
    color: var(--primary);
    margin-bottom: 16px;
    transition: all var(--transition);
}

.process-step:hover .step-icon-box {
    background: rgba(26, 115, 232, 0.1);
    transform: scale(1.05);
}

.step-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== CTA Banner ==================== */
.cta-banner {
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
    padding: 80px 0;
    text-align: center;
    overflow: hidden;
}

.cta-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
}

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

.cta-content h2 {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.cta-content h2 .highlight {
    color: #fff;
    background: none;
    -webkit-text-fill-color: #fff;
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.4);
    text-underline-offset: 8px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

/* ==================== 联系我们 ==================== */
.contact {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateY(-2px);
}

.contact-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.08), rgba(79, 195, 247, 0.08));
    border-radius: var(--radius-sm);
    color: var(--primary);
    flex-shrink: 0;
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-link {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    transition: color var(--transition);
}

.contact-link:hover {
    color: var(--primary-dark);
}

.contact-form-wrap {
    position: sticky;
    top: 100px;
}

.contact-form-card {
    background: var(--bg-white);
    padding: 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.contact-form-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-form-card > p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group label span {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-white);
    transition: all var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239aa0a6' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--text-primary);
    color: #b0b8c1;
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #8899aa;
}

.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.footer-links ul,
.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 14px;
    color: #8899aa;
    transition: all var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    color: #8899aa;
    line-height: 1.6;
}

.footer-contact ul li svg {
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: #6b7c8e;
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.4);
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out both;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .section-title {
        font-size: 34px;
    }

    .hero-title {
        font-size: 44px;
    }

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

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

@media (max-width: 768px) {
    .navbar {
        padding: 12px 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        justify-content: center;
        gap: 12px;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition);
        padding: 40px;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-link {
        font-size: 17px;
        padding: 12px 20px;
    }

    section {
        padding: 64px 0;
    }

    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: 60px;
    }

    .hero-content {
        padding: 40px 0;
    }

    .hero-title {
        font-size: 34px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: 20px;
        flex-wrap: wrap;
    }

    .stat-divider {
        display: none;
    }

    .stat-number {
        font-size: 30px;
    }

    .scroll-indicator {
        display: none;
    }

    .section-title {
        font-size: 28px;
    }

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

    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .process-step {
        flex-direction: column;
    }

    .step-number {
        flex-direction: row;
        width: 100%;
        gap: 16px;
        align-items: center;
    }

    .step-line {
        width: auto;
        flex: 1;
        height: 2px;
        min-height: auto;
    }

    .step-content {
        padding: 20px 0 32px 0;
    }

    .cta-content h2 {
        font-size: 26px;
    }

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

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

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 24px;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .contact-form-card {
        padding: 24px;
    }
}

/* ==================== 滚动动画 ==================== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}