/* ============================================
   全局变量 & 重置
   ============================================ */
:root {
    --primary: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #64b5f6;
    --accent: #00bcd4;
    --accent-dark: #00838f;
    --dark: #0d1b2a;
    --dark-2: #1b263b;
    --gray-1: #f5f7fa;
    --gray-2: #e8eef5;
    --gray-3: #cfd8e3;
    --gray-text: #5a6b7e;
    --text: #1a2332;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #1e88e5 0%, #00bcd4 100%);
    --gradient-dark: linear-gradient(135deg, #0d1b2a 0%, #1b263b 100%);
    --shadow-sm: 0 2px 8px rgba(13, 27, 42, 0.06);
    --shadow-md: 0 8px 30px rgba(13, 27, 42, 0.10);
    --shadow-lg: 0 20px 60px rgba(13, 27, 42, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
    --header-h: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-h);
}

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

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 40px;
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(207, 216, 227, 0.4);
    z-index: 1000;
    transition: var(--transition);
}

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

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

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

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

.logo-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.logo-en {
    font-size: 10px;
    color: var(--gray-text);
    letter-spacing: 0.5px;
    margin-top: 2px;
}

.nav {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 4px 0;
}

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

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

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

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

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

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-h);
    overflow: hidden;
    background: linear-gradient(135deg, #0a1628 0%, #0d2b4e 40%, #0a1f3a 100%);
    color: var(--white);
}

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

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.hero-orb-1 {
    width: 500px; height: 500px;
    background: #1e88e5;
    top: -100px; right: -100px;
    animation: orbFloat1 12s ease-in-out infinite;
}

.hero-orb-2 {
    width: 400px; height: 400px;
    background: #00bcd4;
    bottom: -80px; left: -80px;
    animation: orbFloat2 14s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-40px, 40px); }
}
@keyframes orbFloat2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(40px, -30px); }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(100, 181, 246, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(100, 181, 246, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    padding-top: 60px;
    padding-bottom: 60px;
}

.hero-content {
    flex: 1;
    max-width: 620px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(30, 136, 229, 0.15);
    border: 1px solid rgba(100, 181, 246, 0.3);
    border-radius: 30px;
    font-size: 13px;
    color: #90caf9;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #bbdefb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-slogan {
    font-size: 24px;
    font-weight: 600;
    color: #64b5f6;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(30, 136, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(30, 136, 229, 0.5);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 48px;
}

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

.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* Hero 视觉 */
.hero-visual {
    flex-shrink: 0;
    width: 420px;
    height: 420px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-ring {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring-core {
    width: 140px; height: 140px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 60px rgba(30, 136, 229, 0.5);
    z-index: 5;
}

.core-text {
    font-size: 24px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 2px;
}

.ring-orbit {
    position: absolute;
    border: 1px solid rgba(100, 181, 246, 0.2);
    border-radius: 50%;
    animation: spin 30s linear infinite;
}

.ring-orbit-1 { width: 240px; height: 240px; }
.ring-orbit-2 { width: 340px; height: 340px; animation-duration: 40s; animation-direction: reverse; }
.ring-orbit-3 { width: 420px; height: 420px; animation-duration: 50s; }

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.orbit-dot {
    position: absolute;
    width: 56px; height: 56px;
    border-radius: 50%;
    background: rgba(30, 136, 229, 0.15);
    border: 1px solid rgba(100, 181, 246, 0.3);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: #bbdefb;
}

.dot-1 { top: 10%; left: 50%; transform: translateX(-50%); }
.dot-2 { top: 50%; right: 5%; transform: translateY(-50%); }
.dot-3 { bottom: 10%; left: 50%; transform: translateX(-50%); }
.dot-4 { top: 50%; left: 5%; transform: translateY(-50%); }

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

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 3px;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.section-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-sub {
    font-size: 16px;
    color: var(--gray-text);
    max-width: 640px;
    margin: 0 auto;
}

/* ============================================
   公司简介
   ============================================ */
.about {
    background: var(--gray-1);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .lead {
    font-size: 22px;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.6;
    margin-bottom: 24px;
}

.about-text p {
    font-size: 15px;
    color: var(--gray-text);
    line-height: 1.9;
    margin-bottom: 18px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 36px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.feature-icon {
    flex-shrink: 0;
    width: 52px; height: 52px;
    border-radius: 14px;
    background: var(--gradient);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(30, 136, 229, 0.25);
}

.feature-text h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 13px;
    color: var(--gray-text);
    margin: 0;
}

/* 公司简介 - 技术卡片 */
.about-visual {
    display: flex;
    justify-content: center;
}

.tech-card {
    position: relative;
    width: 340px;
    padding: 40px 36px;
    background: var(--gradient-dark);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.card-glow {
    position: absolute;
    top: -50%; right: -30%;
    width: 250px; height: 250px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.3;
}

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

.tech-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
    font-size: 16px;
    font-weight: 500;
}

.tech-row:last-child { border-bottom: none; }

.tech-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
}

/* ============================================
   核心业务板块
   ============================================ */
.business {
    background: var(--white);
}

.business-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.biz-tab {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 36px;
    background: var(--gray-1);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    min-width: 200px;
    text-align: left;
}

.biz-tab:hover {
    background: var(--gray-2);
}

.biz-tab.active {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.tab-num {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.tab-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
}

.tab-en {
    font-size: 11px;
    color: var(--gray-text);
    margin-top: 4px;
}

/* Tab Panel */
.biz-panel {
    display: none;
    animation: fadeIn 0.5s ease;
}

.biz-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.panel-intro h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.panel-intro p {
    font-size: 15px;
    color: var(--gray-text);
    line-height: 1.8;
}

.biz-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

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

.biz-card {
    background: var(--white);
    border: 1px solid var(--gray-2);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.biz-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

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

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

.card-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--gray-2);
    margin-bottom: 12px;
}

.biz-card h4 {
    font-size: 19px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

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

.card-tags {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 12px;
    background: var(--gray-1);
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary);
    font-weight: 500;
}

/* ============================================
   典型项目成果
   ============================================ */
.outcomes {
    background: var(--gray-1);
}

.outcome-summary {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 56px;
    padding: 28px 40px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary);
    text-align: left;
}

.outcome-summary p {
    font-size: 16px;
    color: var(--text);
    line-height: 1.8;
}

.outcome-summary strong {
    color: var(--primary);
}

.outcome-projects {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.outcome-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

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

.outcome-num {
    flex-shrink: 0;
    width: 52px; height: 52px;
    border-radius: 14px;
    background: var(--gradient);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
}

.outcome-content h4 {
    font-size: 19px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

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

/* ============================================
   精选案例
   ============================================ */
.cases {
    background: var(--white);
}

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

.case-category.full {
    grid-column: 1 / -1;
}

.case-cat-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.cat-bar {
    width: 4px; height: 24px;
    background: var(--gradient);
    border-radius: 2px;
}

.case-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.case-item {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--gray-1);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.case-logo {
    flex-shrink: 0;
    width: 64px; height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--white);
    text-align: center;
    line-height: 1.3;
}

.case-logo.read { background: linear-gradient(135deg, #e53935, #ff6f00); }
.case-logo.jx { background: linear-gradient(135deg, #43a047, #00897b); }
.case-logo.online { background: linear-gradient(135deg, #1e88e5, #5e35b1); }
.case-logo.wallet { background: linear-gradient(135deg, #fb8c00, #f4511e); }
.case-logo.coupon { background: linear-gradient(135deg, #d81b60, #e53935); }
.case-logo.jzz { background: linear-gradient(135deg, #00897b, #1e88e5); }

.case-info h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

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

/* 嘉广传媒大厦 */
.tower-case {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 48px;
    background: var(--gradient-dark);
    border-radius: var(--radius);
    color: var(--white);
    overflow: hidden;
    position: relative;
}

.tower-case::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 300px; height: 300px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
}

.tower-info {
    position: relative;
    z-index: 2;
}

.tower-info h4 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tower-info > p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
}

.tower-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tower-features li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    padding-left: 20px;
    position: relative;
}

.tower-features li::before {
    content: '';
    position: absolute;
    left: 0; top: 8px;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.tower-features li strong {
    color: #90caf9;
}

.tower-visual {
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.tower-circle {
    position: relative;
    width: 300px; height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.circle-center {
    width: 120px; height: 120px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(30, 136, 229, 0.4);
    z-index: 5;
}

.center-num {
    font-size: 22px;
    font-weight: 800;
    color: var(--white);
}

.center-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

.circle-seg {
    position: absolute;
    width: 60px; height: 60px;
    border-radius: 50%;
    background: rgba(30, 136, 229, 0.15);
    border: 1px solid rgba(100, 181, 246, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: #bbdefb;
    backdrop-filter: blur(10px);
}

.seg-1 { top: 0; left: 50%; transform: translateX(-50%); }
.seg-2 { top: 50%; right: 0; transform: translateY(-50%); }
.seg-3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.seg-4 { top: 50%; left: 0; transform: translateY(-50%); }
.seg-5 { top: 15%; left: 15%; }
.seg-6 { bottom: 15%; right: 15%; }

/* ============================================
   联系我们
   ============================================ */
.contact {
    background: var(--gray-1);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 56px;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.contact-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.contact-icon {
    width: 60px; height: 60px;
    margin: 0 auto 20px;
    border-radius: 16px;
    background: var(--gradient);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(30, 136, 229, 0.25);
}

.contact-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

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

.cta-block {
    text-align: center;
    padding: 56px 40px;
    background: var(--gradient-dark);
    border-radius: var(--radius);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.cta-block::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px;
    width: 200px; height: 200px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.2;
}

.cta-block h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.cta-block p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 28px;
    position: relative;
    z-index: 2;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

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

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

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}

.footer-left p {
    font-size: 14px;
    margin-bottom: 4px;
}

.footer-tag {
    color: var(--primary-light) !important;
    margin-top: 8px !important;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-col h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 10px;
    transition: var(--transition);
    cursor: pointer;
}

.footer-col a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

/* ============================================
   动画
   ============================================ */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================
   响应式 - 平板 (≤1024px)
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 32px;
    }

    .hero-title {
        font-size: 38px;
    }

    .hero-slogan {
        font-size: 20px;
    }

    .hero-visual {
        width: 320px;
        height: 320px;
    }

    .ring-core { width: 110px; height: 110px; }
    .core-text { font-size: 20px; }
    .ring-orbit-1 { width: 190px; height: 190px; }
    .ring-orbit-2 { width: 270px; height: 270px; }
    .ring-orbit-3 { width: 340px; height: 340px; }
    .orbit-dot { width: 48px; height: 48px; font-size: 12px; }

    .section-title {
        font-size: 32px;
    }

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

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

    .biz-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .outcome-projects {
        grid-template-columns: 1fr;
    }

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

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

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

    .footer-inner {
        flex-direction: column;
        gap: 32px;
    }

    .footer-links {
        gap: 40px;
        flex-wrap: wrap;
    }
}

/* ============================================
   响应式 - 手机 (≤768px)
   ============================================ */
@media (max-width: 768px) {
    :root {
        --header-h: 60px;
    }

    .container {
        padding: 0 20px;
    }

    /* 导航栏 - 移动端 */
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        border-bottom: 1px solid var(--gray-2);
    }

    .nav.open {
        max-height: 400px;
        padding: 8px 0;
    }

    .nav-link {
        padding: 14px 24px;
        font-size: 16px;
        border-bottom: 1px solid var(--gray-2);
    }

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

    .nav-link:hover,
    .nav-link.active {
        color: var(--primary);
        background: var(--gray-1);
    }

    .menu-toggle {
        display: flex;
    }

    .logo-title {
        font-size: 17px;
    }

    .logo-en {
        font-size: 9px;
    }

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

    /* Hero - 移动端 */
    .hero {
        min-height: auto;
        padding-top: calc(var(--header-h) + 30px);
        padding-bottom: 50px;
    }

    .hero-inner {
        flex-direction: column-reverse;
        gap: 30px;
        text-align: center;
        align-items: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-tag {
        font-size: 12px;
        padding: 6px 14px;
    }

    .hero-title {
        font-size: 30px;
        line-height: 1.3;
    }

    .hero-slogan {
        font-size: 17px;
        letter-spacing: 1px;
    }

    .hero-desc {
        font-size: 14px;
    }

    .hero-actions {
        justify-content: center;
        margin-bottom: 36px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    .hero-stats {
        justify-content: center;
        gap: 24px;
        flex-wrap: wrap;
    }

    .stat-num {
        font-size: 28px;
    }

    .stat-label {
        font-size: 11px;
    }

    .hero-visual {
        width: 260px;
        height: 260px;
    }

    .ring-core { width: 90px; height: 90px; }
    .core-text { font-size: 16px; }
    .ring-orbit-1 { width: 150px; height: 150px; }
    .ring-orbit-2 { width: 210px; height: 210px; }
    .ring-orbit-3 { width: 270px; height: 270px; }
    .orbit-dot { width: 40px; height: 40px; font-size: 10px; }

    .hero-orb-1 { width: 300px; height: 300px; }
    .hero-orb-2 { width: 250px; height: 250px; }

    /* Section 通用 */
    .section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

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

    .section-sub {
        font-size: 14px;
    }

    .section-tag {
        font-size: 11px;
        letter-spacing: 2px;
    }

    /* 公司简介 */
    .about-text .lead {
        font-size: 18px;
    }

    .about-text p {
        font-size: 14px;
    }

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

    .feature-item {
        gap: 12px;
    }

    .feature-icon {
        width: 44px; height: 44px;
    }

    .feature-icon svg {
        width: 22px; height: 22px;
    }

    .feature-text h4 {
        font-size: 15px;
    }

    .feature-text p {
        font-size: 12px;
    }

    .tech-card {
        width: 100%;
        max-width: 320px;
        padding: 28px 24px;
    }

    .tech-row {
        font-size: 14px;
        padding: 12px 0;
    }

    /* 核心业务 */
    .business-tabs {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }

    .biz-tab {
        min-width: auto;
        padding: 16px 20px;
        flex-direction: row;
        align-items: center;
        gap: 12px;
    }

    .tab-num {
        margin-bottom: 0;
    }

    .tab-name {
        font-size: 16px;
    }

    .tab-en {
        margin-top: 0;
    }

    .panel-intro h3 {
        font-size: 20px;
    }

    .panel-intro p {
        font-size: 14px;
    }

    .biz-grid,
    .biz-grid-4 {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .biz-card {
        padding: 24px 20px;
    }

    .card-num {
        font-size: 26px;
    }

    .biz-card h4 {
        font-size: 17px;
    }

    .biz-card p {
        font-size: 13px;
    }

    /* 典型项目成果 */
    .outcome-summary {
        padding: 20px 24px;
    }

    .outcome-summary p {
        font-size: 14px;
    }

    .outcome-card {
        flex-direction: row;
        padding: 24px 20px;
        gap: 16px;
    }

    .outcome-num {
        width: 44px; height: 44px;
        font-size: 18px;
    }

    .outcome-content h4 {
        font-size: 17px;
    }

    .outcome-content p {
        font-size: 13px;
    }

    /* 精选案例 */
    .case-cat-title {
        font-size: 18px;
    }

    .case-item {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }

    .case-logo {
        width: 56px; height: 56px;
        font-size: 12px;
    }

    .case-info h4 {
        font-size: 16px;
    }

    .case-info p {
        font-size: 13px;
    }

    /* 嘉广传媒大厦 */
    .tower-case {
        padding: 28px 20px;
    }

    .tower-info h4 {
        font-size: 20px;
    }

    .tower-info > p {
        font-size: 14px;
    }

    .tower-features li {
        font-size: 13px;
    }

    .tower-circle {
        width: 240px; height: 240px;
    }

    .circle-center {
        width: 90px; height: 90px;
    }

    .center-num {
        font-size: 18px;
    }

    .circle-seg {
        width: 48px; height: 48px;
        font-size: 11px;
    }

    /* 联系我们 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .contact-card {
        padding: 28px 20px;
    }

    .contact-icon {
        width: 50px; height: 50px;
    }

    .contact-card h4 {
        font-size: 16px;
    }

    .contact-card p {
        font-size: 13px;
    }

    .cta-block {
        padding: 36px 24px;
    }

    .cta-block h3 {
        font-size: 22px;
    }

    .cta-block p {
        font-size: 14px;
    }

    /* 页脚 */
    .footer {
        padding-top: 40px;
    }

    .footer-inner {
        gap: 28px;
        padding-bottom: 28px;
    }

    .footer-logo {
        font-size: 20px;
    }

    .footer-links {
        gap: 32px;
    }

    .footer-bottom .container {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

/* ============================================
   响应式 - 小手机 (≤480px)
   ============================================ */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

    .hero-slogan {
        font-size: 15px;
    }

    .hero-desc {
        font-size: 13px;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-num {
        font-size: 24px;
    }

    .hero-visual {
        width: 220px;
        height: 220px;
    }

    .ring-core { width: 80px; height: 80px; }
    .core-text { font-size: 14px; }
    .ring-orbit-1 { width: 130px; height: 130px; }
    .ring-orbit-2 { width: 180px; height: 180px; }
    .ring-orbit-3 { width: 230px; height: 230px; }
    .orbit-dot { width: 36px; height: 36px; font-size: 9px; }

    .section-title {
        font-size: 22px;
    }

    .btn {
        padding: 11px 20px;
        font-size: 13px;
    }

    .hero-actions {
        gap: 12px;
    }

    .biz-tab {
        padding: 14px 16px;
    }

    .tab-name {
        font-size: 15px;
    }

    .biz-card {
        padding: 20px 18px;
    }

    .case-item {
        padding: 16px;
    }

    .tower-case {
        padding: 20px 16px;
    }

    .tower-circle {
        width: 200px; height: 200px;
    }

    .circle-center {
        width: 76px; height: 76px;
    }

    .center-num {
        font-size: 16px;
    }

    .circle-seg {
        width: 40px; height: 40px;
        font-size: 10px;
    }

    .contact-card {
        padding: 24px 16px;
    }

    .cta-block {
        padding: 28px 20px;
    }

    .cta-block h3 {
        font-size: 20px;
    }
}