/* ========================================
   汉威声屏障 - 高端专业版样式
   参考设计：德航噪声治理网站
   ======================================== */

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --blue-dark: #0f2540;
    --blue-mid: #1a365d;
    --blue-primary: #2b6cb0;
    --blue-light: #4a8bc2;
    --blue-bg: #e8f0fe;
    --gold: #c9a96e;
    --gold-light: #e8d5a3;
    --text-dark: #1a202c;
    --text-mid: #4a5568;
    --text-light: #718096;
    --white: #ffffff;
    --shadow-sm: 0 4px 20px rgba(26, 54, 93, 0.08);
    --shadow-md: 0 12px 40px rgba(26, 54, 93, 0.12);
    --shadow-lg: 0 24px 60px rgba(26, 54, 93, 0.18);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    background: #f5f8fc;
    line-height: 1.6;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Animation Keyframes === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}
@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}
@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}
@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

/* === Scroll Reveal Animation === */
.service-card, .advantage-card, .case-card, .industry-card, .highlight-card, .step-content, .faq-item, .partner-item {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.service-card.revealed, .advantage-card.revealed, .case-card.revealed, .industry-card.revealed,
.highlight-card.revealed, .step-content.revealed, .faq-item.revealed, .partner-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* === Active Nav Link === */
.main-nav a.active {
    color: var(--gold-light);
}
.main-nav a.active::after {
    width: 100%;
    background: var(--gold-light);
}

/* === Header Scroll Effect === */
.site-header.header-scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* === Skip Link === */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--blue-primary);
    color: #fff;
    padding: 8px 16px;
    z-index: 9999;
    font-size: 14px;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
    letter-spacing: 0.3px;
}
.btn-lg { padding: 16px 42px; font-size: 16px; }
.btn-primary {
    background: linear-gradient(135deg, var(--gold) 0%, #b8943e 100%);
    color: var(--text-dark);
    box-shadow: 0 8px 32px rgba(201, 169, 110, 0.35);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(201, 169, 110, 0.5);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--gold-light);
}

/* === Header === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 54, 93, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
    height: 72px;
    display: flex;
    align-items: center;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}
.logo {
    display: flex;
    align-items: center;
    gap: 4px;
}
.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 320px;
    display: block;
}
.main-nav ul {
    display: flex;
    align-items: center;
    gap: 32px;
}
.main-nav a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}
.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}
.main-nav a:hover {
    color: var(--white);
}
.main-nav a:hover::after {
    width: 100%;
}

/* === Section Link Nav Items === */
.nav-section-link a {
    color: rgba(201, 169, 110, 0.85);
    font-size: 14px;
    font-weight: 500;
}
.nav-section-link a::before {
    content: '›';
    margin-right: 6px;
    color: var(--gold);
    opacity: 0.7;
}
.nav-section-link a:hover {
    color: var(--white);
}
.nav-section-link a:hover::after {
    background: var(--gold-light);
}

/* === Dropdown Menu === */
.nav-dropdown { position: relative; }
.nav-more { cursor: pointer; }
.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(26, 54, 93, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 8px 0;
    min-width: 160px;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    list-style: none;
    margin: 0;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
    display: block;
    animation: fadeInUp 0.25s ease;
}
.nav-dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
    transition: var(--transition);
}
.nav-dropdown-menu li a:hover {
    color: var(--white);
    background: rgba(201, 169, 110, 0.1);
    padding-left: 24px;
}
.nav-dropdown-menu li a::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--gold);
    border-radius: 50%;
    margin-right: 10px;
    opacity: 0.6;
}

.section-nav-desktop {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.section-nav-desktop::-webkit-scrollbar { display: none; }
.section-nav-desktop .section-nav-link { white-space: nowrap; }

/* === Mobile Menu Animations === */
.main-nav li {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.main-nav.open li {
    opacity: 1;
    transform: translateX(0);
}
.section-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-nav-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 20px;
    transition: var(--transition);
    white-space: nowrap;
}
.section-nav-link:hover {
    color: var(--white);
    background: rgba(201, 169, 110, 0.15);
}
.btn-phone {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gold-light);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
    background: rgba(255, 255, 255, 0.06);
    padding: 10px 22px;
    border-radius: 50px;
    border: 1px solid rgba(201, 169, 110, 0.25);
    transition: var(--transition);
}
.btn-phone:hover {
    background: rgba(201, 169, 110, 0.15);
    border-color: var(--gold);
}
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 6px;
}
.mobile-toggle span {
    width: 28px;
    height: 2.5px;
    background: var(--white);
    border-radius: 4px;
    transition: var(--transition);
}
.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, var(--blue-dark) 0%, var(--blue-mid) 40%, var(--blue-primary) 70%, #1e3a5f 100%);
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(74, 139, 194, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(201, 169, 110, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(43, 108, 176, 0.10) 0%, transparent 50%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='0.5'/%3E%3C/svg%3E");
    background-size: 60px 60px;
    opacity: 0.4;
    pointer-events: none;
}
.hero-float {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}
.hero-float-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(201, 169, 110, 0.4) 0%, transparent 70%);
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}
.hero-float-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(74, 139, 194, 0.5) 0%, transparent 70%);
    bottom: 10%;
    left: 5%;
    animation-delay: 2s;
}
.hero-content {
    text-align: center;
    max-width: 960px;
    position: relative;
    z-index: 2;
}
.hero-badge {
    display: inline-block;
    background: rgba(201, 169, 110, 0.15);
    border: 1px solid rgba(201, 169, 110, 0.25);
    color: var(--gold-light);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 26px;
    border-radius: 50px;
    letter-spacing: 2px;
    margin-bottom: 28px;
    backdrop-filter: blur(4px);
    animation: fadeInUp 1s ease both 0.2s;
}
.hero-title {
    font-size: clamp(40px, 7vw, 72px);
    font-weight: 800;
    color: var(--white);
    line-height: 1.12;
    letter-spacing: 2px;
    margin-bottom: 16px;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 1s ease both 0.4s;
}
.hero-title .highlight {
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-sub {
    font-size: clamp(18px, 2.5vw, 28px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 14px;
    letter-spacing: 4px;
    animation: fadeInUp 1s ease both 0.6s;
}
.hero-desc {
    font-size: clamp(15px, 1.6vw, 19px);
    color: rgba(255, 255, 255, 0.72);
    max-width: 720px;
    margin: 16px auto 36px;
    line-height: 1.8;
    font-weight: 300;
    animation: fadeInUp 1s ease both 0.8s;
}
.hero-desc strong {
    color: var(--gold-light);
    font-weight: 500;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 24px;
    animation: fadeInUp 1s ease both 1s;
}
.hero-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    animation: fadeInUp 1s ease both 1.2s;
}
.hero-phone-number {
    font-size: 28px;
    color: var(--gold-light);
    letter-spacing: 1.5px;
    font-weight: 800;
    text-shadow: 0 2px 12px rgba(201, 169, 110, 0.4);
}
.hero-phone-number:hover { color: var(--white); }

/* === Stats Bar === */
.stats-bar {
    background: linear-gradient(135deg, var(--blue-mid) 0%, var(--blue-dark) 100%);
    padding: 56px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}
.stat-item {
    position: relative;
    padding: 16px;
}
.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: rgba(255, 255, 255, 0.12);
}
.stat-num {
    display: block;
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--white) 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    letter-spacing: -1px;
}
.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* === Section Common === */
.section { padding: 100px 0; }
.section:nth-child(even) { background: #fff; }
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(201, 169, 110, 0.12) 0%, rgba(201, 169, 110, 0.08) 100%);
    border: 1px solid rgba(201, 169, 110, 0.25);
    color: var(--gold);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    padding: 8px 22px;
    border-radius: 50px;
    margin-bottom: 18px;
}
.section-header h2 {
    font-size: 40px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.section-header p {
    font-size: 17px;
    color: var(--text-light);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* === About Section === */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
    align-items: center;
}
.about-text p {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-mid);
    margin-bottom: 18px;
}
.about-text .btn { margin-top: 16px; }
.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.highlight-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.08);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.highlight-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(201, 169, 110, 0.3);
}
.hl-icon {
    font-size: 36px;
    display: block;
    margin-bottom: 16px;
}
.highlight-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}
.highlight-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* === Services Grid === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.service-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(201, 169, 110, 0.3);
}
.service-img {
    background: linear-gradient(145deg, #f8fafc 0%, #e8f0fe 100%);
    padding: 56px 24px;
    text-align: center;
    border-bottom: 1px solid rgba(26, 54, 93, 0.06);
}
.service-icon { font-size: 56px; display: block; }
.service-info { padding: 32px; }
.service-info h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}
.service-info p {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 18px;
    line-height: 1.7;
}
.service-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--blue-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.service-link:hover { gap: 10px; }
.service-link::after { content: '→'; }

/* === Advantages === */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 40px 28px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(201, 169, 110, 0.3);
}
.adv-icon { font-size: 48px; display: block; margin-bottom: 20px; }
.advantage-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}
.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* === Cases === */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.case-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(201, 169, 110, 0.3);
}
.case-icon { font-size: 48px; display: block; margin-bottom: 20px; }
.case-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}
.case-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 14px;
}
.case-tag {
    display: inline-block;
    padding: 5px 14px;
    background: linear-gradient(135deg, rgba(201, 169, 110, 0.12) 0%, rgba(201, 169, 110, 0.08) 100%);
    color: var(--gold);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid rgba(201, 169, 110, 0.25);
}

/* === FAQ === */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item {
    border: 1px solid rgba(26, 54, 93, 0.08);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.faq-item:hover {
    box-shadow: var(--shadow-md);
}
.faq-q {
    padding: 22px 28px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    position: relative;
    background: #fff;
    transition: var(--transition);
    color: var(--text-dark);
}
.faq-q::after {
    content: '+';
    position: absolute;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: var(--gold);
    font-weight: 300;
}
.faq-q:hover { background: #f8fafc; }
.faq-item.active .faq-q::after { content: '−'; }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    background: #f8fafc;
}
.faq-item.active .faq-a { max-height: 320px; }
.faq-a div {
    padding: 0 28px 22px;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* === CTA Section === */
.cta-section { padding: 96px 0; }
.cta-box {
    background: linear-gradient(145deg, var(--blue-mid) 0%, var(--blue-dark) 100%);
    border-radius: var(--radius);
    padding: 72px 48px;
    text-align: center;
    color: #fff;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 30%, rgba(201, 169, 110, 0.12) 0%, transparent 50%);
}
.cta-box h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
}
.cta-box p {
    font-size: 17px;
    opacity: 0.88;
    margin-bottom: 28px;
    position: relative;
}
.cta-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 32px;
    font-size: 15px;
    opacity: 0.85;
    position: relative;
}
.cta-phone a {
    font-size: 40px;
    color: var(--gold-light);
    letter-spacing: 1.5px;
    font-weight: 800;
    text-shadow: 0 2px 12px rgba(201, 169, 110, 0.4);
}
.cta-phone a:hover { opacity: 0.9; }
.cta-box .btn-primary {
    background: linear-gradient(135deg, var(--gold) 0%, #b8943e 100%);
    color: var(--text-dark);
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(201, 169, 110, 0.4);
}
.cta-box .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(201, 169, 110, 0.55);
}

/* === Industry Section === */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.industry-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.industry-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(201, 169, 110, 0.3);
}
.industry-icon { font-size: 48px; margin-bottom: 16px; display: block; }
.industry-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}
.industry-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 14px;
}
.industry-features { margin-bottom: 14px; }
.industry-features li {
    font-size: 14px;
    color: var(--text-mid);
    padding: 6px 0 6px 22px;
    position: relative;
    line-height: 1.6;
}
.industry-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: 700;
}
.industry-card .service-link { font-size: 14px; font-weight: 600; }

/* === Process Section (Horizontal Steps with Arrows) === */
.process-section { background: #f8fafc; padding: 80px 0; }
.process-steps {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    padding: 20px 0;
}
.process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
}
/* 步骤编号圆圈 */
.step-num {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue-primary) 0%, var(--blue-mid) 100%);
    color: #fff;
    font-size: 28px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 6px 24px rgba(43, 108, 176, 0.35);
    border: 4px solid #f8fafc;
    position: relative;
    z-index: 2;
}
/* 步骤内容卡片 */
.step-content {
    background: #fff;
    border: 2px solid rgba(43, 108, 176, 0.12);
    border-radius: var(--radius);
    padding: 24px 20px;
    max-width: 180px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.step-content:hover {
    border-color: var(--blue-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}
.step-content h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}
.step-content p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}
/* 箭头连接 */
.step-connector {
    flex: 0 0 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.step-connector .arrow {
    font-size: 64px;
    color: var(--gold);
    font-weight: 900;
    line-height: 1;
}
/* 移动端适配 */
@media (max-width: 768px) {
    .process-steps {
        flex-direction: column;
        gap: 32px;
    }
    .step-connector {
        display: none;
    }
    .step-num {
        width: 60px;
        height: 60px;
        font-size: 22px;
        margin-bottom: 12px;
    }
    .step-content {
        max-width: 100%;
        padding: 16px;
    }
}

/* === Footer === */
.site-footer {
    background: linear-gradient(180deg, var(--blue-dark) 0%, #0c1220 100%);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand h3 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 14px;
}
.footer-brand p {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
}
.footer-col h4 {
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}
.footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.55);
    font-size: 14px;
    padding: 6px 0;
    transition: var(--transition);
}
.footer-col a:hover { color: var(--gold-light); padding-left: 6px; }
.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.35);
}

/* === Page Hero (Inner Pages) === */
.page-hero {
    background: linear-gradient(145deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
    color: #fff;
    padding: 96px 0 72px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(201, 169, 110, 0.08) 0%, transparent 70%);
}
.page-hero h1 {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 14px;
    position: relative;
}
.page-hero p {
    font-size: 18px;
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

/* === Region Hero === */
.region-hero { padding: 48px 0; }
.region-hero h1 { font-size: 28px; }
.region-overview { margin-bottom: 40px; }
.region-info h2 { font-size: 24px; font-weight: 700; margin-bottom: 16px; }
.region-info p { font-size: 15px; color: var(--text-light); line-height: 1.8; margin-bottom: 12px; }
.region-highlights { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin: 24px 0; }
.highlight { background: var(--blue-bg); border-radius: var(--radius-sm); padding: 20px; text-align: center; }
.highlight .num { font-size: 28px; font-weight: 800; color: var(--blue-primary); display: block; }
.highlight .label { font-size: 13px; color: var(--text-light); }

/* === Contact Page === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}
.contact-info h2 { font-size: 26px; font-weight: 700; margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 22px; align-items: flex-start; }
.contact-item .icon { font-size: 24px; flex-shrink: 0; }
.contact-item h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--text-light); }
.contact-form {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.08);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}
.contact-form h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-dark); }
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(26, 54, 93, 0.12);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: #f8fafc;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.12);
    background: #fff;
}

/* === News Page === */
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.news-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.news-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(201, 169, 110, 0.3);
}
.news-date { font-size: 13px; color: var(--text-light); font-weight: 500; }
.news-card h3 { font-size: 17px; font-weight: 700; margin: 10px 0; color: var(--text-dark); }
.news-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* === Article Page === */
.article-content { max-width: 820px; margin: 0 auto; }
.article-content h1 { font-size: 32px; font-weight: 800; margin-bottom: 18px; color: var(--text-dark); }
.article-meta { font-size: 14px; color: var(--text-light); margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid rgba(26, 54, 93, 0.08); }
.article-body { font-size: 16px; line-height: 2; color: var(--text-dark); }
.article-body h2 { font-size: 24px; font-weight: 700; margin: 36px 0 18px; color: var(--text-dark); }
.article-body h3 { font-size: 20px; font-weight: 700; margin: 28px 0 14px; color: var(--text-dark); }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { padding-left: 26px; margin-bottom: 18px; }
.article-body li { margin-bottom: 10px; }

/* === Services Page === */
.services-page-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.service-page-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.service-page-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: rgba(201, 169, 110, 0.3);
}
.service-page-card .icon { font-size: 48px; display: block; margin-bottom: 18px; }
.service-page-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 14px; color: var(--text-dark); }
.service-page-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 18px; }

/* === Cases Page === */
.cases-page-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.case-page-card {
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.case-page-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: rgba(201, 169, 110, 0.3);
}
.case-page-card .icon { font-size: 40px; display: block; margin-bottom: 14px; }
.case-page-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.case-page-card .industry {
    font-size: 12px;
    color: var(--gold);
    background: rgba(201, 169, 110, 0.12);
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 14px;
    font-weight: 600;
    border: 1px solid rgba(201, 169, 110, 0.25);
}
.case-page-card p { font-size: 15px; color: var(--text-light); line-height: 1.7; }

/* === About Page === */
.about-page h2 { font-size: 26px; font-weight: 700; margin-bottom: 18px; color: var(--text-dark); }
.about-page p { font-size: 16px; color: var(--text-light); line-height: 1.9; margin-bottom: 18px; }
.timeline { position: relative; padding-left: 36px; margin: 36px 0; }
.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 169, 110, 0.3) 100%);
}
.timeline-item { position: relative; margin-bottom: 28px; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gold);
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.3);
}
.timeline-item .year { font-size: 14px; font-weight: 700; color: var(--gold); }
.timeline-item h4 { font-size: 17px; font-weight: 600; margin: 4px 0; color: var(--text-dark); }
.timeline-item p { font-size: 15px; color: var(--text-light); }

/* === Breadcrumb === */
.breadcrumb { padding: 18px 0; font-size: 13px; color: var(--text-light); background: #f5f8fc; }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--blue-primary); }
.breadcrumb span { margin: 0 8px; }

/* === Partners Section === */
.partners-section { background: #fff; }
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
    max-width: 960px;
    margin: 0 auto;
}
.partner-item {
    background: #f8fafc;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius-sm);
    padding: 24px 18px;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition);
}
.partner-item:hover {
    box-shadow: var(--shadow-md);
    color: var(--blue-primary);
    border-color: rgba(201, 169, 110, 0.3);
    transform: translateY(-2px);
}

/* === Regions Grid === */
.regions-grid a {
    display: block;
    background: #fff;
    border: 1px solid rgba(26, 54, 93, 0.06);
    border-radius: var(--radius);
    padding: 22px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.regions-grid a:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: rgba(201, 169, 110, 0.3);
}
.regions-grid h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); }
.regions-grid span { font-size: 13px; color: var(--gold); font-weight: 600; }

/* === Mobile === */
@media (max-width: 1024px) {
    .services-grid,
    .advantages-grid,
    .cases-grid,
    .industry-grid { grid-template-columns: repeat(2, 1fr); }
    .about-content { gap: 40px; }
}
@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(26, 54, 93, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 24px 32px 32px;
        flex-direction: column;
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }
    .main-nav.open { display: flex; }
    .main-nav ul { flex-direction: column; gap: 4px; }
    .main-nav li { width: 100%; }
    .main-nav a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .main-nav a:last-child { border-bottom: none; }
    .mobile-toggle { display: flex; }
    .hero { padding: 100px 24px 60px; min-height: auto; }
    .hero-title { font-size: 36px; }
    .hero-desc { font-size: 16px; }
    .hero-phone-number { font-size: 24px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .stat-num { font-size: 32px; }
    .stat-item:not(:last-child)::after { display: none; }
    .about-content { grid-template-columns: 1fr; gap: 36px; }
    .about-highlights { grid-template-columns: 1fr 1fr; }
    .services-grid,
    .advantages-grid,
    .cases-grid,
    .industry-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .contact-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .services-page-grid { grid-template-columns: 1fr; }
    .cases-page-grid { grid-template-columns: 1fr; }
    .cta-box { padding: 48px 28px; }
    .cta-box h2 { font-size: 24px; }
    .cta-phone a { font-size: 28px; }
    .region-highlights { grid-template-columns: 1fr; }
    .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .process-step {
        flex-direction: column;
        gap: 12px;
    }
    .step-content {
        max-width: 100%;
        padding: 16px;
    }
    .section { padding: 64px 0; }
    .section-header h2 { font-size: 26px; }

    /* Mobile dropdown styling */
    .nav-dropdown-menu {
        position: static;
        display: none;
        background: rgba(0, 0, 0, 0.2);
        border: none;
        border-radius: 8px;
        margin-top: 8px;
        box-shadow: none;
    }
    .nav-dropdown.open .nav-dropdown-menu { display: block; }
    .nav-dropdown-menu li a { padding: 10px 16px; }
}

/* 移动端锚点导航 */
.section-nav-mobile {
    display: none;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 0;
}

@media (max-width: 768px) {
    .section-nav-mobile {
        display: flex;
    }
    
    .section-nav-mobile .section-nav-link {
        font-size: 13px;
        padding: 5px 10px;
        background: rgba(255,255,255,0.1);
        border-radius: 4px;
    }
}

/* 桌面锚点导航移动端隐藏 */
@media (max-width: 768px) {
    .section-nav-desktop {
        display: none !important;
    }
    .btn-phone span.phone-text {
        display: none;
    }
    .btn-phone {
        padding: 10px 14px;
        font-size: 0;
    }
}

/* Desktop nav always visible */
@media (min-width: 769px) {
    .main-nav li {
        opacity: 1;
        transform: none;
    }
}

/* === 联系页样式优化 === */
.contact-item { display: flex; gap: 8px; margin-bottom: 16px; align-items: baseline; flex-wrap: wrap; }
.contact-item .label { font-size: 14px; color: var(--text-dark); font-weight: 600; min-width: 70px; }
.contact-item p { font-size: 14px; color: var(--text-light); margin: 0; }
.contact-info h2 { font-size: 22px; font-weight: 700; margin-bottom: 20px; color: var(--text-dark); }