/* ============================================
   灵动未来网络 - 全域广告营销官方网站
   科技商务轻奢蓝色主调 · PC + 移动端响应式
   ============================================ */

/* ============ CSS 变量 ============ */
:root {
    /* 主色系 - 科技商务轻奢蓝 */
    --c-primary: #0A2463;
    --c-primary-light: #1E3A8A;
    --c-secondary: #2563EB;
    --c-accent: #06B6D4;
    --c-accent-light: #0EA5E9;

    /* 辅助色 */
    --c-gold: #C9A961;
    --c-gold-light: #E5C76B;

    /* 背景色 */
    --c-bg: #F8FBFF;
    --c-bg-light: #F0F7FF;
    --c-bg-card: #FFFFFF;
    --c-bg-dark: #0A1B3D;

    /* 文字色 */
    --c-text: #0F172A;
    --c-text-gray: #475569;
    --c-text-light: #94A3B8;
    --c-text-white: #FFFFFF;

    /* 边框 */
    --c-border: #E2E8F0;
    --c-border-light: #F1F5F9;

    /* 渐变 */
    --grad-primary: linear-gradient(135deg, #0A2463 0%, #1E3A8A 50%, #2563EB 100%);
    --grad-accent: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
    --grad-gold: linear-gradient(135deg, #C9A961 0%, #E5C76B 100%);
    --grad-hero: linear-gradient(160deg, #061A40 0%, #0A2463 30%, #1E3A8A 60%, #2563EB 100%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(10, 36, 99, 0.06);
    --shadow-md: 0 8px 30px rgba(10, 36, 99, 0.10);
    --shadow-lg: 0 20px 60px rgba(10, 36, 99, 0.15);
    --shadow-xl: 0 30px 80px rgba(10, 36, 99, 0.20);
    --shadow-blue: 0 8px 30px rgba(37, 99, 235, 0.25);
    --shadow-gold: 0 8px 30px rgba(201, 169, 97, 0.20);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 布局 */
    --container-max: 1280px;
    --header-height: 76px;
}

/* ============ Reset ============ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

ul {
    list-style: none;
}

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

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

/* 移动端输入框防止 iOS 缩放 */
@media (max-width: 768px) {
    input, textarea, select {
        font-size: 16px !important;
    }
}

/* ============ 布局 ============ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
    cursor: pointer;
    letter-spacing: 0.5px;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 17px; }
.btn-block { width: 100%; }

.btn-primary {
    background: var(--grad-accent);
    color: #fff;
    box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(37, 99, 235, 0.35);
}

.btn-cta {
    background: var(--grad-gold);
    color: #fff;
    box-shadow: var(--shadow-gold);
    font-size: 16px;
    padding: 16px 36px;
}
.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(201, 169, 97, 0.40);
}

.btn-outline {
    background: transparent;
    color: var(--c-secondary);
    border: 2px solid var(--c-secondary);
}
.btn-outline:hover {
    background: var(--c-secondary);
    color: #fff;
    transform: translateY(-2px);
}

/* ============ 头部导航 ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    height: 64px;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
}

.logo-icon-sm { width: 36px; height: 36px; }

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-size: 19px;
    font-weight: 700;
    color: var(--c-primary);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 10px;
    color: var(--c-text-light);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-list {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text-gray);
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--c-secondary);
    background: var(--c-bg-light);
}

.nav-link.active {
    color: var(--c-secondary);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--grad-accent);
    border-radius: 2px;
}

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 17px;
    font-weight: 700;
    color: var(--c-primary);
    letter-spacing: 0.5px;
}

.header-phone svg {
    width: 18px;
    height: 18px;
    color: var(--c-accent);
}

.header-phone:hover {
    color: var(--c-accent);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--c-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ============ 首屏横幅 ============ */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: calc(var(--vh, 1vh) * 100);
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--grad-hero);
    padding-top: var(--header-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(6, 182, 212, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(6, 182, 212, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 12s ease-in-out infinite;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #06B6D4, transparent);
    top: -100px;
    right: -100px;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #2563EB, transparent);
    bottom: -50px;
    left: -80px;
    animation-delay: -4s;
}

.hero-orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #C9A961, transparent);
    top: 40%;
    left: 50%;
    opacity: 0.15;
    animation-delay: -8s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.1); }
    66% { transform: translate(-30px, 30px) scale(0.95); }
}

/* --- 首屏内容 --- */
.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1280px;
    padding: 60px 32px;
    width: 100%;
    margin: 0 auto;
}

/* --- 左侧文字区 --- */
.hero-left {
    max-width: 620px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px 6px 12px;
    background: rgba(37, 99, 235, 0.2);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: #93C5FD;
    letter-spacing: 1px;
    margin-bottom: 28px;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #06B6D4;
    box-shadow: 0 0 10px #06B6D4;
    animation: badgePulse 2s ease-in-out infinite;
}

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

.hero-headline {
    font-size: 56px;
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    letter-spacing: 2px;
    margin-bottom: 24px;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.hero-headline-accent {
    background: linear-gradient(135deg, #06B6D4 0%, #38BDF8 40%, #C9A961 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-desc strong {
    color: #06B6D4;
    font-weight: 700;
}

/* --- 四大业务卡片行 --- */
.hero-biz {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 36px;
}

.hero-biz-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all .3s ease;
    overflow: hidden;
    text-decoration: none;
}

.hero-biz-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    opacity: 0;
    transition: opacity .3s;
}

.hero-biz-wx::before  { background: #07C160; }
.hero-biz-dy::before  { background: #FF0050; }
.hero-biz-geo::before { background: #6366F1; }
.hero-biz-xhs::before { background: #FF2442; }

.hero-biz-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.hero-biz-card:hover::before {
    opacity: 1;
}

.hero-biz-geo {
    border-color: rgba(99, 102, 241, 0.35);
    background: rgba(99, 102, 241, 0.1);
}

.hero-biz-geo::before {
    opacity: 1;
}

.hero-biz-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
}

.hero-biz-icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

.hero-biz-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.hero-biz-name {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    line-height: 1.2;
}

.hero-biz-sub {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
    line-height: 1.2;
}

.hero-biz-hot {
    position: absolute;
    top: 6px;
    right: 8px;
    font-size: 9px;
    font-weight: 700;
    color: #C9A961;
    background: rgba(201, 169, 97, 0.15);
    border: 1px solid rgba(201, 169, 97, 0.3);
    border-radius: 4px;
    padding: 1px 6px;
    letter-spacing: 0.5px;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-phone-box {
    text-align: left;
}

.hero-phone-label {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 2px;
    margin-bottom: 2px;
}

.hero-phone-number {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #fff, #B8DAFF);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity .3s;
}

.hero-phone-number:hover {
    opacity: 0.85;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

.hero-stat-num {
    font-size: 38px;
    font-weight: 800;
    color: #06B6D4;
    line-height: 1;
}

.hero-stat-unit {
    font-size: 18px;
    font-weight: 700;
    color: #06B6D4;
}

.hero-stat-label {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 4px;
    letter-spacing: 1px;
}

.hero-stat-divider {
    width: 1px;
    height: 44px;
    background: rgba(255, 255, 255, 0.12);
}

/* --- 右侧可视化区 --- */
.hero-right {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-visual {
    position: relative;
    width: 480px;
    height: 420px;
}

/* 核心枢纽 */
.hero-hub {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 5;
}

.hero-hub-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 1.5px solid rgba(6, 182, 212, 0.3);
    animation: ringPulse 3s ease-in-out infinite;
}

.hero-hub-ring-2 {
    width: 160px;
    height: 160px;
    border-color: rgba(6, 182, 212, 0.15);
    animation-delay: -1.5s;
}

@keyframes ringPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.15); opacity: 0.5; }
}

.hero-hub-core {
    position: relative;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1E3A8A, #2563EB, #06B6D4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(6, 182, 212, 0.4), 0 0 80px rgba(37, 99, 235, 0.2);
    animation: hubGlow 3s ease-in-out infinite;
}

@keyframes hubGlow {
    0%, 100% { box-shadow: 0 0 40px rgba(6, 182, 212, 0.4), 0 0 80px rgba(37, 99, 235, 0.2); }
    50% { box-shadow: 0 0 60px rgba(6, 182, 212, 0.6), 0 0 120px rgba(37, 99, 235, 0.35); }
}

.hero-hub-label {
    font-size: 14px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 2px;
    line-height: 1.2;
}

.hero-hub-sub {
    font-size: 10px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}

/* 四大平台卡片 */
.hero-platform {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    background: rgba(10, 30, 70, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 14px;
    cursor: default;
    transition: all .3s ease;
    z-index: 3;
}

.hero-platform:hover {
    transform: scale(1.05);
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.2);
}

.hero-plat-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
}

.hero-plat-icon svg {
    width: 100%;
    height: 100%;
}

.hero-plat-name {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    white-space: nowrap;
}

.hero-plat-desc {
    display: block;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
}

/* 平台卡片定位 */
.hero-plat-wx  { top: 10px;   left: 50px; }
.hero-plat-dy  { top: 10px;   right: 50px; }
.hero-plat-geo { bottom: 10px; left: 50px; }
.hero-plat-xhs { bottom: 10px; right: 50px; }

/* 连线SVG */
.hero-lines {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* 底部滚动提示 */
.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    letter-spacing: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============ 通用 Section Header ============ */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--c-accent);
    margin-bottom: 12px;
}

.section-label-light {
    color: var(--c-accent-light);
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--c-primary);
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--grad-accent);
    border-radius: 2px;
    margin: 0 auto 24px;
}

.section-desc {
    font-size: 16px;
    color: var(--c-text-gray);
    line-height: 1.9;
}

.section-desc strong {
    color: var(--c-secondary);
    font-weight: 700;
}

/* ============ 全国服务网络 ============ */
.network {
    padding: 100px 0;
    background: var(--c-bg);
    position: relative;
}

.network::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.03), transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.03), transparent 40%);
    pointer-events: none;
}

.city-regions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
    position: relative;
}

.city-region {
    background: var(--c-bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border-light);
    transition: var(--transition);
}

.city-region:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.15);
}

.region-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--c-bg-light);
    position: relative;
}

.region-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--grad-accent);
}

.city-cards {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.city-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--c-bg-light);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: 1px solid transparent;
}

.city-card:hover {
    background: #fff;
    border-color: var(--c-accent);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.city-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--c-text);
}

.city-phone {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-secondary);
    font-family: "SF Mono", "Consolas", monospace;
    letter-spacing: 0.5px;
}

.city-phone:hover {
    color: var(--c-accent);
}

.network-cta {
    text-align: center;
    padding: 40px;
    background: var(--grad-primary);
    border-radius: var(--radius-xl);
    color: #fff;
}

.network-cta p {
    font-size: 18px;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.network-cta .btn {
    background: var(--grad-gold);
    color: #fff;
}

/* ============ 四大核心业务 ============ */
.business {
    padding: 100px 0;
    background: var(--c-bg-light);
    position: relative;
}

.business-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.business-item {
    display: flex;
    align-items: center;
    gap: 48px;
    background: var(--c-bg-card);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--c-border-light);
    overflow: hidden;
    position: relative;
}

.business-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--grad-accent);
    opacity: 0;
    transition: var(--transition);
}

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

.business-item:hover::before {
    opacity: 1;
}

.business-item-reverse {
    flex-direction: row-reverse;
}

.business-icon {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.business-icon svg {
    width: 60px;
    height: 60px;
}

.business-icon-wechat {
    background: linear-gradient(135deg, #07C160, #06AD56);
    color: #fff;
}

.business-icon-douyin {
    background: linear-gradient(135deg, #000000, #25F4EE);
    color: #fff;
}

.business-icon-geo {
    background: linear-gradient(135deg, #2563EB, #06B6D4);
    color: #fff;
}

.business-icon-redbook {
    background: linear-gradient(135deg, #FF2442, #FF6078);
    color: #fff;
}

.business-icon:hover {
    transform: scale(1.05) rotate(-3deg);
}

.business-content {
    flex: 1;
}

.business-num {
    font-size: 56px;
    font-weight: 900;
    color: var(--c-bg-light);
    line-height: 1;
    position: absolute;
    right: 32px;
    top: 24px;
    font-family: "Georgia", serif;
}

.business-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.business-desc {
    font-size: 15px;
    color: var(--c-text-gray);
    line-height: 1.9;
    margin-bottom: 20px;
}

.business-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.business-features li {
    font-size: 13px;
    color: var(--c-secondary);
    background: var(--c-bg-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

/* ============ 核心业务 - 着重介绍样式 ============ */
.business-item-featured {
    border: 1px solid rgba(6, 182, 212, 0.2);
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(6, 182, 212, 0.08);
    background: linear-gradient(135deg, #fff, #f0faff);
    position: relative;
    overflow: visible;
}

.business-item-featured::before {
    opacity: 1 !important;
    background: var(--grad-accent);
    width: 5px;
}

.business-badge {
    position: absolute;
    top: -14px;
    left: 36px;
    background: var(--grad-accent);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 4px 18px;
    border-radius: 50px;
    letter-spacing: 1px;
    box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3);
}

.business-title-highlight {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: var(--grad-accent);
    padding: 3px 12px;
    border-radius: 50px;
    vertical-align: middle;
    margin-left: 8px;
    letter-spacing: 0.5px;
}

.business-sub-sections {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--c-border-light);
}

.business-sub {
    background: var(--c-bg-light);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--c-border-light);
    transition: var(--transition);
}

.business-sub:hover {
    background: #fff;
    border-color: rgba(6, 182, 212, 0.2);
    box-shadow: var(--shadow-sm);
}

.business-sub h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 8px;
}

.business-sub p {
    font-size: 13px;
    color: var(--c-text-gray);
    line-height: 1.7;
    margin-bottom: 12px;
}

/* ============ 紧凑版城市列表 ============ */
.city-compact {
    margin-bottom: 32px;
}

.city-compact-region {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--c-border-light);
    transition: var(--transition);
}

.city-compact-region:hover {
    background: var(--c-bg-light);
    margin: 0 -12px;
    padding-left: 12px;
    padding-right: 12px;
    border-radius: var(--radius-sm);
}

.cc-region-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--c-secondary);
    background: var(--c-bg-light);
    padding: 3px 10px;
    border-radius: 4px;
    white-space: nowrap;
    min-width: 48px;
    text-align: center;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.cc-cities {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px;
}

.cc-city {
    font-size: 13px;
    color: var(--c-text);
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 4px;
    transition: var(--transition);
    white-space: nowrap;
}

.cc-city span {
    font-size: 11px;
    color: var(--c-accent);
    font-family: "SF Mono", "Consolas", monospace;
    font-weight: 600;
    margin-left: 4px;
    opacity: 0;
    transition: var(--transition);
}

.cc-city:hover {
    background: var(--c-bg-light);
    color: var(--c-accent);
}

.cc-city:hover span {
    opacity: 1;
}

.cc-sep {
    color: var(--c-border);
    font-size: 12px;
    user-select: none;
}

.section-title-sm { font-size: 28px; }
.section-desc-sm { font-size: 14px; max-width: 600px; }

.network .network-cta {
    padding: 20px;
    border-radius: var(--radius-md);
}

.network .network-cta p {
    font-size: 15px;
    margin-bottom: 0;
}

/* ============ 品牌核心优势 ============ */
.advantages {
    padding: 100px 0;
    background: var(--c-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.advantage-card {
    background: var(--c-bg-card);
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--grad-accent);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.advantage-card:hover::after {
    transform: scaleX(1);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-bg-light);
    border-radius: var(--radius-md);
    color: var(--c-secondary);
    transition: var(--transition);
}

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

.advantage-card:hover .advantage-icon {
    background: var(--grad-accent);
    color: #fff;
    transform: scale(1.1);
}

.advantage-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--c-text-gray);
    line-height: 1.8;
}

.advantage-card strong {
    color: var(--c-secondary);
}

/* ============ 品牌案例展示 ============ */
.cases {
    padding: 100px 0;
    background: var(--c-bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
    margin-bottom: 50px;
}

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

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

.case-image {
    height: 200px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.case-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(10, 36, 99, 0.75));
}

.case-image-1 { background: linear-gradient(135deg, #FF6B6B, #FF8E53, #FFA500); }
.case-image-2 { background: linear-gradient(135deg, #E056FD, #C44569, #F8B500); }
.case-image-3 { background: linear-gradient(135deg, #2563EB, #06B6D4, #0EA5E9); }
.case-image-4 { background: linear-gradient(135deg, #0FBCF9, #00D8D6, #05C46B); }
.case-image-5 { background: linear-gradient(135deg, #1E3A8A, #2563EB, #7C3AED); }
.case-image-6 { background: linear-gradient(135deg, #C9A961, #E5C76B, #F0D984); }

.case-card:hover .case-image {
    filter: brightness(1.08);
}

.case-industry {
    position: relative;
    z-index: 2;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 50px;
    letter-spacing: 1px;
}

.case-info {
    padding: 24px;
}

.case-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 10px;
}

.case-info p {
    font-size: 14px;
    color: var(--c-text-gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

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

.case-tags span {
    font-size: 12px;
    color: var(--c-accent);
    background: rgba(6, 182, 212, 0.08);
    padding: 4px 12px;
    border-radius: 50px;
    font-weight: 500;
}

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

/* ============ 案例展示 - 精选大图 ============ */
.cases-featured {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 48px;
}

.case-featured-item {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    background: var(--c-bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--c-border-light);
    transition: var(--transition);
}

.case-featured-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.case-featured-reverse {
    grid-template-columns: 1fr 1.2fr;
    direction: rtl;
}

.case-featured-reverse .case-featured-body {
    direction: ltr;
}

.case-featured-image {
    position: relative;
    min-height: 320px;
    display: flex;
    align-items: flex-end;
    padding: 32px;
    overflow: hidden;
}

.case-fi-1 { background: linear-gradient(135deg, #FF6B6B, #FF8E53, #F97316); }
.case-fi-2 { background: linear-gradient(135deg, #E056FD, #C44569, #F8B500); }
.case-fi-3 { background: linear-gradient(135deg, #2563EB, #06B6D4, #0EA5E9); }

.case-fi-1::before,
.case-fi-2::before,
.case-fi-3::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.15), transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(255,255,255,0.08), transparent 40%);
}

.case-featured-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.5));
}

.case-featured-tag {
    position: absolute;
    top: 24px;
    left: 24px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    z-index: 2;
}

.case-fi-label {
    background: rgba(255,255,255,0.95);
    color: var(--c-primary);
    font-size: 14px;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: 50px;
    letter-spacing: 1px;
}

.case-fi-scale {
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 50px;
}

.case-featured-data {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 32px;
}

.case-fi-stat {
    text-align: center;
}

.case-fi-num {
    font-size: 42px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
    text-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.case-fi-unit {
    font-size: 18px;
    font-weight: 700;
    color: rgba(255,255,255,0.85);
}

.case-fi-desc {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.75);
    margin-top: 4px;
}

.case-featured-body {
    padding: 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-featured-body h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.case-featured-body p {
    font-size: 14px;
    color: var(--c-text-gray);
    line-height: 1.9;
    margin-bottom: 20px;
}

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

.case-fi-tags span {
    font-size: 12px;
    color: var(--c-accent);
    background: rgba(6, 182, 212, 0.08);
    padding: 5px 14px;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid rgba(6, 182, 212, 0.12);
    transition: var(--transition);
}

.case-fi-tags span:hover {
    background: var(--c-accent);
    color: #fff;
}

/* ============ 联系我们 ============ */
.contact {
    padding: 100px 0;
    background: var(--grad-hero);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(6, 182, 212, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(6, 182, 212, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.contact-info {
    color: #fff;
}

.contact-title {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 32px;
    letter-spacing: 2px;
}

.contact-phone-block {
    margin-bottom: 28px;
}

.contact-phone-label {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.contact-phone-number {
    font-size: 56px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 4px;
    line-height: 1.1;
    background: linear-gradient(135deg, #fff, #06B6D4, #C9A961);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 4px 30px rgba(6, 182, 212, 0.3);
}

.contact-phone-number:hover {
    opacity: 0.92;
}

.contact-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 2;
    margin-bottom: 32px;
}

.contact-highlights {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-highlight {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
}

.contact-highlight svg {
    color: #06B6D4;
    flex-shrink: 0;
}

.contact-form {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.form-title {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 28px;
    text-align: center;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group label span {
    color: #06B6D4;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 15px;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--c-accent);
    background: rgba(6, 182, 212, 0.08);
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: var(--c-primary);
    color: #fff;
}

.form-group textarea {
    resize: vertical;
}

.contact-form .btn {
    margin-top: 8px;
}

.form-note {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
}

.form-note a {
    color: var(--c-accent-light);
}

.form-success {
    text-align: center;
    padding: 40px 20px;
    color: #fff;
}

.form-success svg {
    width: 64px;
    height: 64px;
    color: #06B6D4;
    margin-bottom: 16px;
}

.form-success h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.form-success p {
    color: rgba(255, 255, 255, 0.7);
}

/* ============ 页脚 ============ */
.footer {
    background: var(--c-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-col-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

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

.footer-company-name {
    font-size: 15px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 12px;
}

.footer-intro {
    font-size: 14px;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.5);
}

.footer-col-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--c-accent);
    padding-left: 4px;
}

.footer-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.footer-phone svg {
    width: 22px;
    height: 22px;
    color: var(--c-accent);
}

.footer-phone:hover {
    color: var(--c-accent);
}

.footer-business-scope {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.footer-scope-detail {
    font-size: 13px;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.45);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    gap: 20px;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.55);
}

.footer-bottom-phone:hover {
    color: var(--c-accent);
}

/* ============ 悬浮客服弹窗 ============ */
.floating-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
}

.floating-popup {
    position: absolute;
    bottom: 70px;
    right: 0;
    width: 360px;
    background: var(--c-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: var(--transition);
    overflow: hidden;
}

.floating-popup.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.popup-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--c-bg-light);
    color: var(--c-text-gray);
    transition: var(--transition);
    z-index: 2;
}

.popup-close:hover {
    background: var(--c-border);
    color: var(--c-text);
}

.popup-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 24px 24px 16px;
    background: var(--grad-primary);
    color: #fff;
}

.popup-avatar {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.popup-title {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.popup-name {
    font-size: 15px;
    font-weight: 600;
}

.popup-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

.popup-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 8px #22c55e;
}

.popup-body {
    padding: 20px 24px;
}

.popup-msg {
    font-size: 14px;
    color: var(--c-text-gray);
    line-height: 1.8;
    margin-bottom: 8px;
}

.popup-phone-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 0 24px 24px;
    padding: 14px;
    background: var(--grad-accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: var(--shadow-blue);
    transition: var(--transition);
}

.popup-phone-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(37, 99, 235, 0.35);
}

.floating-toggle {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--grad-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-blue);
    transition: var(--transition);
}

.floating-toggle:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 36px rgba(37, 99, 235, 0.4);
}

.floating-toggle-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 22px;
    height: 22px;
    background: #EF4444;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #fff;
}

/* ============ 悬浮电话按钮 ============ */
.floating-phone-btn {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--grad-gold);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-gold);
    z-index: 998;
    transition: var(--transition);
}

.floating-phone-btn:hover {
    transform: scale(1.08);
}

.floating-phone-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--c-gold);
    animation: phonePulse 2s ease-out infinite;
    z-index: -1;
}

@keyframes phonePulse {
    0% { transform: scale(1); opacity: 0.5; }
    100% { transform: scale(1.6); opacity: 0; }
}

/* ============ 回到顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--c-bg-card);
    color: var(--c-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 997;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

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

.back-to-top:hover {
    background: var(--c-primary);
    color: #fff;
    transform: translateY(-4px);
}

/* ============ 移动端底部固定栏 ============ */
.mobile-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 996;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--c-border);
    padding: 8px 16px env(safe-area-inset-bottom, 8px);
}

.mobile-bar-phone,
.mobile-bar-consult {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-bar-phone {
    background: var(--c-bg-light);
    color: var(--c-primary);
    margin-right: 8px;
}

.mobile-bar-consult {
    background: var(--grad-accent);
    color: #fff;
}

/* ============ 动画 ============ */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============ 响应式 - 平板 ============ */
@media (max-width: 1024px) {
    .hero-content { gap: 40px; padding: 60px 24px; }
    .hero-headline { font-size: 42px; }
    .hero-headline-accent { font-size: 42px; }
    .hero-desc { font-size: 14px; }
    .hero-biz { gap: 10px; margin-bottom: 32px; }
    .hero-biz-card { padding: 12px 14px; }
    .hero-phone-number { font-size: 28px; }
    .hero-visual { width: 380px; height: 360px; transform: scale(0.85); }
    .hero-plat-wx { top: 5px; left: 20px; }
    .hero-plat-dy { top: 5px; right: 20px; }
    .hero-plat-geo { bottom: 5px; left: 20px; }
    .hero-plat-xhs { bottom: 5px; right: 20px; }
    .section-title { font-size: 30px; }
    .contact-phone-number { font-size: 44px; }
    .business-item { gap: 32px; padding: 36px; }
    .business-num { font-size: 44px; }
    .business-sub-sections { grid-template-columns: repeat(2, 1fr); }
    .business-sub:last-child { grid-column: 1 / -1; }
    .case-featured-item, .case-featured-reverse { grid-template-columns: 1fr 1fr; }
    .case-featured-image { min-height: 260px; }
    .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* ============ 响应式 - 中等平板/小笔记本 ============ */
@media (max-width: 900px) and (min-width: 769px) {
    .hero-content { gap: 24px; }
    .hero-visual { width: 320px; height: 300px; transform: scale(0.8); }
    .hero-headline { font-size: 36px; }
    .hero-headline-accent { font-size: 36px; }
    .hero-biz { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .hero-biz-card { padding: 10px 12px; }
    .hero-biz-name { font-size: 13px; }
    .hero-biz-sub { font-size: 11px; }
}

/* ============ 响应式 - 移动端 ============ */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .container { padding: 0 16px; }

    /* 导航 */
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        padding: 80px 24px 24px;
        box-shadow: var(--shadow-xl);
        transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 1001;
    }

    .nav.active { right: 0; }

    .nav-list {
        flex-direction: column;
        gap: 4px;
    }

    .nav-link {
        padding: 14px 16px;
        font-size: 16px;
        border-radius: var(--radius-sm);
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .nav-link.active::after { display: none; }

    .header-contact { display: none; }

    .hamburger { display: flex; }

    /* 首屏 */
    .hero { min-height: auto; padding: 90px 0 60px; }
    .hero-content { grid-template-columns: 1fr; gap: 32px; text-align: center; }
    .hero-left { max-width: 100%; }
    .hero-badge { font-size: 12px; padding: 6px 14px; letter-spacing: 1px; }
    .hero-headline { font-size: 30px; line-height: 1.35; }
    .hero-headline-accent { font-size: 30px; }
    .hero-desc { font-size: 14px; margin-left: auto; margin-right: auto; line-height: 1.8; }

    /* 四大业务卡片 - 移动端 2 列 */
    .hero-biz {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-bottom: 28px;
    }
    .hero-biz-card {
        padding: 10px 12px;
        gap: 8px;
        border-radius: 12px;
        min-height: 56px;
    }
    .hero-biz-icon { width: 32px; height: 32px; flex-shrink: 0; }
    .hero-biz-name { font-size: 12px; }
    .hero-biz-sub { font-size: 10px; }
    .hero-biz-hot { font-size: 8px; padding: 1px 4px; top: 4px; right: 4px; }

    .hero-cta {
        flex-direction: column;
        gap: 16px;
        align-items: center;
        margin-bottom: 32px;
    }
    .hero-phone-box { text-align: center; }
    .hero-phone-label { font-size: 11px; letter-spacing: 1.5px; }
    .hero-phone-number { font-size: 26px; letter-spacing: 1px; }
    .hero-cta .btn-cta { width: 100%; max-width: 320px; padding: 14px 28px; font-size: 15px; }

    .hero-stats { justify-content: center; gap: 16px; }
    .hero-stat-num { font-size: 26px; }
    .hero-stat-unit { font-size: 13px; }
    .hero-stat-label { font-size: 10px; letter-spacing: 0.5px; }
    .hero-stat-divider { height: 30px; }
    .hero-right { display: none; }
    .hero-scroll { display: none; }

    /* Section */
    .section-header { margin-bottom: 36px; }
    .section-title { font-size: 22px; }
    .section-desc { font-size: 13px; line-height: 1.8; }
    .section-label { font-size: 11px; letter-spacing: 2px; }

    /* 各板块间距 */
    .network, .business, .advantages, .cases, .contact { padding: 50px 0; }

    .city-regions { grid-template-columns: 1fr; gap: 20px; }
    .city-region { padding: 24px; }
    .network-cta { padding: 28px 20px; }
    .network-cta p { font-size: 15px; margin-bottom: 18px; }

    /* 核心业务 */
    .business-list { gap: 24px; }
    .business-item, .business-item-reverse {
        flex-direction: column;
        gap: 20px;
        padding: 28px 20px;
        text-align: center;
    }
    .business-icon { width: 72px; height: 72px; }
    .business-icon svg { width: 36px; height: 36px; }
    .business-num { font-size: 36px; right: 16px; top: 12px; }
    .business-title { font-size: 19px; }
    .business-desc { font-size: 14px; line-height: 1.8; text-align: left; }
    .business-features { justify-content: center; gap: 8px; }
    .business-features li { font-size: 12px; padding: 5px 12px; }

    /* 核心业务 - 子区域 & 着重介绍 */
    .business-item-featured { text-align: left; padding: 32px 20px 28px; }
    .business-badge { left: 20px; top: -12px; font-size: 11px; padding: 3px 12px; }
    .business-title-highlight { font-size: 10px; padding: 2px 8px; margin-left: 4px; }
    .business-sub-sections {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-top: 16px;
        padding-top: 16px;
    }
    .business-sub { padding: 16px; }
    .business-sub h4 { font-size: 14px; }
    .business-sub p { font-size: 12px; line-height: 1.8; }

    /* 优势 */
    .advantages-grid { grid-template-columns: 1fr; gap: 16px; }
    .advantage-card { padding: 24px 20px; }
    .advantage-card h3 { font-size: 17px; }
    .advantage-card p { font-size: 14px; }

    /* 案例 */
    .cases-grid { grid-template-columns: 1fr; gap: 20px; }
    .case-featured-item, .case-featured-reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    .case-featured-image {
        min-height: 180px;
        padding: 20px;
    }
    .case-featured-tag { top: 16px; left: 16px; gap: 6px; }
    .case-fi-label { font-size: 12px; padding: 4px 12px; }
    .case-fi-scale { font-size: 11px; padding: 4px 10px; }
    .case-featured-data {
        gap: 16px;
        flex-wrap: wrap;
    }
    .case-fi-num { font-size: 28px; }
    .case-fi-unit { font-size: 14px; }
    .case-fi-desc { font-size: 11px; }
    .case-featured-body { padding: 20px; }
    .case-featured-body h3 { font-size: 17px; }
    .case-featured-body p { font-size: 13px; line-height: 1.8; }
    .case-fi-tags { gap: 6px; }
    .case-fi-tags span { font-size: 11px; padding: 4px 10px; }

    /* 紧凑版城市列表 */
    .city-compact-region { flex-direction: column; gap: 6px; padding: 14px 0; }
    .cc-region-label { font-size: 12px; min-width: auto; align-self: flex-start; }
    .cc-cities { gap: 0; flex-wrap: wrap; }
    .cc-city { font-size: 12px; padding: 4px 6px; }
    .cc-city span { display: none; }
    .cc-sep { display: none; }
    .section-title-sm { font-size: 20px; }

    /* 联系我们 */
    .contact-wrapper { grid-template-columns: 1fr; gap: 36px; }
    .contact-title { font-size: 26px; margin-bottom: 24px; }
    .contact-phone-number { font-size: 34px; letter-spacing: 2px; }
    .contact-desc { font-size: 14px; line-height: 1.8; }
    .contact-highlights { gap: 12px; }
    .contact-highlight { font-size: 13px; }
    .contact-form { padding: 28px 20px; }
    .form-group { margin-bottom: 16px; }
    .form-group label { font-size: 14px; }
    .form-group input,
    .form-group select,
    .form-group textarea {
        min-height: 48px;
        padding: 12px 16px;
        font-size: 16px;
    }

    /* 页脚 */
    .footer-top { grid-template-columns: 1fr; gap: 28px; padding-bottom: 32px; }
    .footer-col-brand { padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.08); }
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding-top: 20px;
    }
    .footer-bottom-left p { font-size: 12px; }
    .footer-phone { font-size: 22px; }

    /* 悬浮元素 - 重新排列避免重叠 */
    .floating-widget { bottom: calc(76px + env(safe-area-inset-bottom, 0px)); right: 14px; }
    .floating-toggle { width: 48px; height: 48px; }
    .floating-popup {
        width: calc(100vw - 28px);
        max-width: 340px;
        bottom: calc(60px + env(safe-area-inset-bottom, 0px));
        right: 0;
    }
    .floating-phone-btn {
        bottom: calc(76px + env(safe-area-inset-bottom, 0px));
        left: 14px;
        width: 48px;
        height: 48px;
    }
    .back-to-top {
        bottom: calc(136px + env(safe-area-inset-bottom, 0px));
        right: 14px;
        width: 42px;
        height: 42px;
    }

    /* 移动端底部固定栏 */
    .mobile-bar {
        display: flex;
        gap: 0;
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }
    .mobile-bar-phone,
    .mobile-bar-consult {
        min-height: 56px;
        font-size: 14px;
    }
}

/* ============ 响应式 - 大屏手机 ============ */
@media (max-width: 480px) {
    .hero { padding: 80px 0 50px; }
    .hero-headline { font-size: 26px; }
    .hero-headline-accent { font-size: 26px; }
    .hero-badge { font-size: 11px; padding: 5px 12px; letter-spacing: 0.5px; }
    .hero-desc { font-size: 13px; }
    .hero-phone-number { font-size: 22px; }
    .hero-cta .btn-cta { padding: 12px 24px; font-size: 14px; }
    .hero-biz { gap: 8px; }
    .hero-biz-card { padding: 8px 10px; gap: 6px; min-height: 50px; }
    .hero-biz-icon { width: 28px; height: 28px; }
    .hero-biz-name { font-size: 11px; }
    .hero-biz-sub { font-size: 9px; }
    .hero-biz-hot { font-size: 7px; padding: 1px 3px; }
    .hero-stat-num { font-size: 22px; }
    .hero-stat-unit { font-size: 12px; }
    .hero-stat-label { font-size: 9px; }
    .hero-stat-divider { height: 26px; }

    .section-title { font-size: 20px; }
    .section-desc { font-size: 12px; }
    .contact-phone-number { font-size: 28px; }

    /* 案例数据 - 超小屏适配 */
    .case-featured-data { gap: 12px; }
    .case-fi-num { font-size: 22px; }
    .case-fi-unit { font-size: 12px; }
    .case-fi-desc { font-size: 10px; }

    .business-title { font-size: 17px; }
    .contact-title { font-size: 22px; }
}

/* ============ 响应式 - 小屏手机 ============ */
@media (max-width: 360px) {
    .hero-headline { font-size: 22px; }
    .hero-headline-accent { font-size: 22px; }
    .hero-phone-number { font-size: 19px; letter-spacing: 0.5px; }
    .hero-badge { font-size: 10px; padding: 4px 10px; }

    /* 超小屏业务卡片改为 1 列 */
    .hero-biz { grid-template-columns: 1fr; gap: 8px; }
    .hero-biz-card {
        padding: 10px 14px;
        gap: 10px;
        min-height: 48px;
    }
    .hero-biz-icon { width: 32px; height: 32px; }
    .hero-biz-name { font-size: 13px; }
    .hero-biz-sub { font-size: 10px; }

    .hero-stats { gap: 10px; }
    .hero-stat-num { font-size: 20px; }
    .hero-stat-unit { font-size: 11px; }
    .hero-stat-label { font-size: 8px; }
    .hero-stat-divider { height: 24px; }

    .section-title { font-size: 18px; }
    .contact-phone-number { font-size: 24px; letter-spacing: 1px; }
    .business-title { font-size: 16px; }
    .contact-title { font-size: 20px; }

    .case-fi-num { font-size: 20px; }
    .case-fi-unit { font-size: 11px; }

    /* 悬浮弹窗占满宽度 */
    .floating-popup {
        width: calc(100vw - 20px);
        max-width: none;
    }
}

/* ============ 横屏适配 ============ */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: 100vh;
        padding: 70px 0 40px;
    }
    .hero-content { gap: 20px; padding: 20px 24px; }
    .hero-headline { font-size: 26px; }
    .hero-headline-accent { font-size: 26px; }
    .hero-biz { margin-bottom: 20px; }
    .hero-cta { margin-bottom: 20px; }
    .hero-right { display: none; }
}

/* ============ 移动端导航热线区 ============ */
.nav-mobile-contact {
    display: none;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--c-border);
}

.nav-mobile-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    font-size: 20px;
    font-weight: 800;
    color: var(--c-secondary);
    background: var(--c-bg-light);
    border-radius: var(--radius-md);
    letter-spacing: 1px;
    min-height: 52px;
}

.nav-mobile-phone svg {
    color: var(--c-accent);
}

.nav-mobile-consult {
    min-height: 48px;
    font-size: 15px;
}

/* PC 端隐藏移动导航热线区 */
@media (min-width: 769px) {
    .nav-mobile-contact { display: none !important; }
}

/* 移动端显示 */
@media (max-width: 768px) {
    .nav-mobile-contact { display: flex; }
}

/* ============ 遮罩层 ============ */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}