/* ============ 基础重置与变量 ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1877F2;          /* Facebook蓝 */
    --primary-dark: #0E5FCB;
    --primary-light: #4A91F5;
    --accent: #00C6FF;           /* 亮色辅助 */
    --dark: #0F1B2D;
    --text: #2C3E50;
    --text-light: #6B7C8C;
    --bg: #FFFFFF;
    --bg-soft: #F5F8FC;
    --bg-section: #F0F4F9;
    --border: #E4EAF1;
    --gradient-1: linear-gradient(135deg, #1877F2 0%, #00C6FF 100%);
    --gradient-2: linear-gradient(135deg, #0E5FCB 0%, #1877F2 100%);
    --gradient-soft: linear-gradient(180deg, #F5F8FC 0%, #FFFFFF 100%);
    --shadow-sm: 0 2px 8px rgba(24, 119, 242, 0.06);
    --shadow-md: 0 6px 24px rgba(24, 119, 242, 0.1);
    --shadow-lg: 0 20px 60px rgba(24, 119, 242, 0.12);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -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;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

em {
    font-style: normal;
    color: var(--primary);
    font-weight: 600;
}

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

/* ============ 顶部导航 ============ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* LOGO 区域 */
.logo {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-weight: 700;
    font-size: 22px;
    color: var(--dark);
    flex-shrink: 0;
    white-space: nowrap;
}

.logo-brand {
    color: var(--primary);
    font-size: 24px;
    letter-spacing: 0.5px;
    font-weight: 800;
    position: relative;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-right: 2px;
}

.trademark-mark {
    font-size: 12px;
    vertical-align: super;
    -webkit-text-fill-color: var(--primary);
    color: var(--primary);
    margin-left: 1px;
    font-weight: 600;
}

.logo-divider {
    color: var(--text-light);
    font-weight: 300;
    margin: 0 10px;
    font-size: 22px;
}

.logo-biz {
    color: var(--dark);
    font-size: 22px;
    font-weight: 700;
    display: inline-flex;
    align-items: baseline;
}

.logo-biz-em {
    color: var(--primary);
    margin-left: 4px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.main-nav a {
    display: block;
    padding: 8px 14px;
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: rgba(24, 119, 242, 0.06);
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    border-radius: 2px;
    transition: var(--transition);
    transform: translateX(-50%);
}

.main-nav a:hover::after {
    width: 20px;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

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

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============ Banner 区域 ============ */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 120px 24px 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--gradient-soft);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at top right, rgba(24, 119, 242, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(0, 198, 255, 0.12) 0%, transparent 50%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(24, 119, 242, 0.08) 0%, transparent 30%),
        radial-gradient(circle at 80% 70%, rgba(0, 198, 255, 0.06) 0%, transparent 30%);
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, 20px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-inner {
    max-width: 900px;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    font-size: 56px;
    line-height: 1.15;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.title-line-1 {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 600;
    animation-delay: 0.1s;
}

.title-line-2 {
    font-size: 64px;
    background: linear-gradient(135deg, #0F1B2D 0%, #1877F2 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation-delay: 0.3s;
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.5s forwards;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.7s forwards;
}

.hero-tag {
    padding: 8px 20px;
    background: rgba(24, 119, 242, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(24, 119, 242, 0.12);
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.9s forwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 100px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 8px 24px rgba(24, 119, 242, 0.32);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(24, 119, 242, 0.4);
}

.btn-ghost {
    background: #fff;
    color: var(--primary);
    border: 2px solid rgba(24, 119, 242, 0.2);
}

.btn-ghost:hover {
    border-color: var(--primary);
    background: rgba(24, 119, 242, 0.04);
}

.hero-data {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 40px 32px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    opacity: 0;
    animation: fadeUp 0.8s ease 1.1s forwards;
}

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

.data-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    display: inline-block;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.data-unit {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-left: 2px;
}

.data-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 12px;
    opacity: 0;
    animation: fadeUp 0.8s ease 1.3s forwards;
}

.scroll-arrow {
    width: 1px;
    height: 30px;
    background: var(--text-light);
    position: relative;
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============ 通用板块 ============ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}

.section-head.left {
    text-align: left;
    margin: 0 0 40px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-title em {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 44px;
    margin: 0 2px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-light);
}

/* ============ 服务板块 ============ */
.section-services {
    background: #fff;
}

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

.service-card {
    padding: 36px 30px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

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

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

.service-icon {
    font-size: 40px;
    margin-bottom: 20px;
    display: inline-flex;
    width: 64px;
    height: 64px;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(24, 119, 242, 0.1) 0%, rgba(0, 198, 255, 0.05) 100%);
    border-radius: 16px;
}

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

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

.service-list {
    border-top: 1px dashed var(--border);
    padding-top: 16px;
}

.service-list li {
    font-size: 14px;
    color: var(--text);
    padding: 4px 0 4px 20px;
    position: relative;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* ============ 优势板块 ============ */
.section-advantages {
    background: var(--bg-soft);
}

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

.advantage-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(24, 119, 242, 0.2);
}

.advantage-num {
    font-size: 36px;
    font-weight: 800;
    color: transparent;
    -webkit-text-stroke: 1.5px var(--primary);
    line-height: 1;
    flex-shrink: 0;
}

.advantage-body h3 {
    font-size: 18px;
    color: var(--dark);
    font-weight: 700;
    margin-bottom: 8px;
}

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

/* ============ 流程板块 ============ */
.section-process {
    background: #fff;
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: 30px;
    color: var(--primary);
    font-size: 18px;
    font-weight: 700;
    opacity: 0.5;
}

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

.step-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-1);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    margin: 0 auto 16px;
    box-shadow: 0 6px 20px rgba(24, 119, 242, 0.3);
}

.process-step h3 {
    font-size: 16px;
    color: var(--dark);
    font-weight: 700;
    margin-bottom: 6px;
}

.process-step p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ============ 案例板块 ============ */
.section-cases {
    background: var(--bg-soft);
}

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

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

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

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(24, 119, 242, 0.1);
    color: var(--primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.case-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}

.case-data {
    display: flex;
    gap: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.case-data-item {
    display: flex;
    flex-direction: column;
}

.case-data-num {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.case-data-label {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ============ 关于板块 ============ */
.section-about {
    background: #fff;
}

.about-wrap {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

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

.about-feature strong {
    display: block;
    font-size: 32px;
    color: var(--primary);
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.about-feature span {
    font-size: 13px;
    color: var(--text-light);
}

.about-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    position: relative;
}

.about-card {
    padding: 32px 24px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    color: #fff;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-6px) rotate(-2deg);
}

.about-card-2 {
    background: linear-gradient(135deg, #00C6FF 0%, #0072FF 100%);
    transform: translateY(20px);
}

.about-card-3 {
    grid-column: span 2;
    background: linear-gradient(135deg, #0F1B2D 0%, #1E3A5F 100%);
}

.about-card-year {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 8px;
}

.about-card-year sup {
    font-size: 24px;
}

.about-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.about-card-desc {
    font-size: 13px;
    opacity: 0.85;
}

/* ============ FAQ 板块 ============ */
.section-faq {
    background: var(--bg-soft);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

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

.faq-item:hover {
    border-color: rgba(24, 119, 242, 0.2);
}

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

.faq-question {
    width: 100%;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    background: #fff;
    transition: var(--transition);
    gap: 16px;
}

.faq-item.active .faq-question {
    color: var(--primary);
    background: linear-gradient(180deg, rgba(24, 119, 242, 0.02) 0%, transparent 100%);
}

.faq-icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    position: relative;
    transition: var(--transition);
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--primary);
    border-radius: 1px;
    transition: var(--transition);
}

.faq-icon::before {
    width: 14px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    width: 2px;
    height: 14px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) scaleY(0);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

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

.faq-answer p {
    padding: 0 28px 24px;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ============ 联系板块 ============ */
.section-contact {
    background: #fff;
}

.contact-wrap {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-soft);
    border-radius: var(--radius);
    transition: var(--transition);
    align-items: center;
}

.contact-item:hover {
    background: linear-gradient(135deg, rgba(24, 119, 242, 0.04) 0%, rgba(0, 198, 255, 0.04) 100%);
    transform: translateX(6px);
}

.contact-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    background: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    box-shadow: var(--shadow-sm);
}

.contact-detail h4 {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 4px;
}

.contact-detail p {
    font-size: 17px;
    color: var(--dark);
    font-weight: 600;
}

.contact-detail a:hover {
    color: var(--primary);
}

.contact-qr {
    display: flex;
    justify-content: center;
}

.qr-card {
    padding: 24px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    width: 100%;
    max-width: 280px;
}

.qr-card img {
    width: 200px;
    height: 200px;
    margin: 0 auto 12px;
    border-radius: 8px;
    object-fit: cover;
}

.qr-card p {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

/* ============ 其他业务 ============ */
.section-others {
    background: var(--bg-soft);
}

.others-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.other-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.other-link:hover {
    background: var(--gradient-1);
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.other-link.active {
    background: var(--gradient-1);
    color: #fff;
    border-color: transparent;
}

/* ============ 底部 ============ */
.site-footer {
    background: var(--dark);
    color: #B8C2D0;
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    color: #fff;
    margin-bottom: 16px;
    font-size: 20px;
}

.footer-logo .logo-brand,
.footer-logo .logo-biz-em {
    -webkit-text-fill-color: #4A91F5;
    color: #4A91F5;
}

.footer-logo .trademark-mark {
    -webkit-text-fill-color: #4A91F5;
    color: #4A91F5;
}

.footer-desc {
    font-size: 13px;
    line-height: 1.8;
    color: #8A98AB;
    margin-bottom: 16px;
}

.footer-weibo a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 100px;
    font-size: 13px;
    color: #B8C2D0;
    transition: var(--transition);
}

.footer-weibo a:hover {
    background: rgba(24, 119, 242, 0.2);
    color: #fff;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

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

.footer-col ul li {
    padding: 6px 0;
    font-size: 13px;
}

.footer-col ul a {
    color: #8A98AB;
    transition: var(--transition);
}

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

.footer-contact li {
    color: #B8C2D0;
    line-height: 1.7;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #8A98AB;
    line-height: 1.8;
}

.footer-bottom a {
    color: #B8C2D0;
    margin: 0 2px;
}

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

/* ============ 悬浮按钮 ============ */
.float-actions {
    position: fixed;
    right: 24px;
    bottom: 80px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.float-actions.show {
    opacity: 1;
    transform: translateY(0);
}

.float-btn {
    width: 60px;
    height: 60px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    font-size: 18px;
}

.float-btn span {
    font-size: 18px;
    line-height: 1;
}

.float-btn p {
    font-size: 10px;
    margin-top: 2px;
    color: var(--text-light);
}

.float-btn:hover {
    background: var(--gradient-1);
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
}

.float-btn:hover p {
    color: #fff;
}

/* ============ 动画入场 ============ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in {
    opacity: 1;
    transform: translateY(0);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero-title { font-size: 48px; }
    .title-line-1 { font-size: 28px; }
    .title-line-2 { font-size: 52px; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .process-timeline { grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .process-step::after { display: none; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        border-top: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }

    .main-nav.active { max-height: 600px; }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px;
    }

    .main-nav a {
        padding: 12px 16px;
        font-size: 16px;
    }

    .logo {
        font-size: 18px;
    }
    .logo-brand { font-size: 20px; }
    .logo-biz { font-size: 18px; }
    .logo-divider { font-size: 18px; margin: 0 6px; }
    .trademark-mark { font-size: 10px; }

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero-title { font-size: 36px; }
    .title-line-1 { font-size: 22px; }
    .title-line-2 { font-size: 38px; }
    .hero-subtitle { font-size: 15px; }
    .hero-data { grid-template-columns: repeat(2, 1fr); padding: 24px 16px; gap: 16px; }
    .data-num { font-size: 30px; }
    .data-unit { font-size: 18px; }

    .section { padding: 64px 0; }
    .section-title { font-size: 30px; }
    .section-title em { font-size: 32px; }

    .services-grid,
    .advantage-list { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .process-timeline { grid-template-columns: repeat(2, 1fr); }
    .about-wrap { grid-template-columns: 1fr; gap: 40px; }
    .contact-wrap { grid-template-columns: 1fr; gap: 32px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .float-actions { right: 12px; bottom: 60px; }
    .float-btn { width: 50px; height: 50px; }
    .hero-scroll { display: none; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 28px; }
    .title-line-2 { font-size: 30px; }
    .hero-data { grid-template-columns: repeat(2, 1fr); }
    .process-timeline { grid-template-columns: 1fr; }
    .case-data { flex-direction: column; gap: 12px; }
}