/* ============================================
   莱斯口腔门诊部 - LACE DENTAL CLINIC
   Premium Dental Clinic Website Stylesheet
   Blue & White Premium Theme
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    /* Primary Blues */
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;
    --blue-950: #172554;

    /* Accent - Soft Silver */
    --silver-100: #f8fafc;
    --silver-200: #f1f5f9;
    --silver-300: #e2e8f0;
    --silver-400: #cbd5e1;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Functional */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-light: #f8fafc;
    --bg-section: #f1f5f9;

    /* Typography */
    --font-serif: 'Noto Serif SC', 'Playfair Display', serif;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', 'Noto Serif SC', serif;

    /* Spacing */
    --section-padding: 120px;
    --container-width: 1200px;

    /* Transitions */
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.3s var(--ease-smooth);
    --transition-normal: 0.5s var(--ease-smooth);
    --transition-slow: 0.8s var(--ease-smooth);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--white);
    line-height: 1.8;
    overflow-x: hidden;
}

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

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

ul { list-style: none; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 1px 20px rgba(15, 23, 42, 0.06);
}

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

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

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
}

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

.logo-cn {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 2px;
}

.logo-en {
    font-family: var(--font-display);
    font-size: 10px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* Navbar scrolled text colors */
.navbar.scrolled .logo-cn { color: var(--gray-900); }
.navbar.scrolled .logo-en { color: var(--blue-500); }
.navbar.scrolled .nav-toggle span { background: var(--gray-800); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 1px;
    position: relative;
    padding: 4px 0;
}

.navbar.scrolled .nav-links a {
    color: var(--gray-600);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue-500);
    transition: width var(--transition-fast);
    border-radius: 1px;
}

.nav-links a:hover {
    color: var(--blue-400);
}

.navbar.scrolled .nav-links a:hover {
    color: var(--blue-600);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 30px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: all var(--transition-fast);
}

.navbar.scrolled .nav-phone {
    border-color: var(--blue-500);
    color: var(--blue-600);
}

.nav-phone:hover {
    background: var(--blue-500);
    color: var(--white);
    border-color: var(--blue-500);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--blue-950) 0%, var(--blue-900) 40%, var(--blue-800) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(96, 165, 250, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(23, 37, 84, 0.8) 0%, transparent 60%);
    z-index: 1;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 2;
    opacity: 0.4;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--blue-300);
    border-radius: 50%;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 0 24px;
    margin-top: -40px;
}

.hero-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
}

.badge-line {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-400));
}

.badge-line:last-child {
    background: linear-gradient(90deg, var(--blue-400), transparent);
}

.badge-text {
    font-family: var(--font-serif);
    font-size: 13px;
    color: var(--blue-300);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-title-cn {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700;
    color: var(--white);
    letter-spacing: 8px;
    line-height: 1.3;
    margin-bottom: 12px;
}

.hero-title-en {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(12px, 1.5vw, 16px);
    font-weight: 400;
    color: var(--blue-300);
    letter-spacing: 8px;
    text-transform: uppercase;
    opacity: 0.7;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 2;
    letter-spacing: 2px;
    margin-bottom: 48px;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 2px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-family: var(--font-sans);
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: var(--white);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
    background: linear-gradient(135deg, var(--blue-400), var(--blue-500));
}

.btn-primary i {
    font-size: 12px;
    transition: transform var(--transition-fast);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--blue-400);
    color: var(--blue-300);
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.hero-scroll span {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--blue-400), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Hero Stats */
.hero-stats {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    border-top: 1px solid rgba(147, 197, 253, 0.15);
    background: rgba(23, 37, 84, 0.6);
    backdrop-filter: blur(20px);
}

.stat-item {
    flex: 1;
    text-align: center;
    padding: 30px 20px;
    border-right: 1px solid rgba(147, 197, 253, 0.1);
    transition: background var(--transition-fast);
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover {
    background: rgba(59, 130, 246, 0.08);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--blue-300);
    line-height: 1;
}

.stat-unit {
    font-size: 14px;
    color: var(--blue-400);
    margin-left: 2px;
}

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 2px;
}

/* ---------- Section Common ---------- */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 12px;
    color: var(--blue-500);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 16px;
    font-weight: 500;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: 4px;
    margin-bottom: 20px;
}

.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.section-divider span {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-400));
}

.section-divider span:last-child {
    background: linear-gradient(90deg, var(--blue-400), transparent);
}

.section-divider i {
    font-size: 14px;
    color: var(--blue-500);
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- About Section ---------- */
.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-img-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, var(--blue-100), var(--blue-200));
}

.about-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: var(--blue-400);
}

.about-img-placeholder i {
    font-size: 64px;
    opacity: 0.5;
}

.about-img-placeholder span {
    font-size: 14px;
    letter-spacing: 4px;
    opacity: 0.6;
}

.about-exp-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: 0 10px 40px rgba(59, 130, 246, 0.3);
}

.exp-number {
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}

.exp-text {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.4;
    letter-spacing: 1px;
    margin-top: 4px;
}

.about-content {
    padding: 20px 0;
}

.about-lead {
    font-family: var(--font-serif);
    font-size: 20px;
    color: var(--gray-900);
    line-height: 1.8;
    margin-bottom: 20px;
    font-weight: 500;
}

.about-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 16px;
}

.about-features {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.feature-item i {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--blue-600);
}

.feature-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

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

/* ---------- Services Section ---------- */
.services {
    background: var(--bg-section);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: 16px;
    padding: 48px 36px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
    border-color: var(--blue-200);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-400), var(--blue-600));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

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

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--blue-500);
    margin-bottom: 24px;
    transition: all var(--transition-fast);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: var(--white);
}

.service-number {
    position: absolute;
    top: 24px;
    right: 24px;
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--blue-50);
    line-height: 1;
    transition: color var(--transition-fast);
}

.service-card:hover .service-number {
    color: var(--blue-100);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.service-tags li {
    padding: 4px 14px;
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 12px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

.service-card:hover .service-tags li {
    background: var(--blue-100);
}

/* ---------- Team Section ---------- */
.team {
    background: var(--white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    transition: transform var(--transition-fast);
}

.team-card:hover {
    transform: translateY(-8px);
}

.team-photo {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 3/4;
    margin-bottom: 20px;
}

.team-photo-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--blue-100), var(--blue-200));
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-photo-placeholder i {
    font-size: 48px;
    color: var(--blue-300);
    opacity: 0.6;
}

.team-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(30, 58, 138, 0.95));
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.team-card:hover .team-overlay {
    transform: translateY(0);
}

.team-overlay p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.team-info h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.team-title {
    display: block;
    font-size: 12px;
    color: var(--blue-500);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.team-tags {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.team-tags span {
    padding: 3px 12px;
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 11px;
    border-radius: 20px;
}

/* ---------- Environment Section ---------- */
.environment {
    background: linear-gradient(135deg, var(--blue-950) 0%, var(--blue-900) 100%);
    color: var(--white);
}

.environment .section-tag { color: var(--blue-300); }
.environment .section-title { color: var(--white); }
.environment .section-subtitle { color: rgba(255,255,255,0.6); }

.env-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
}

.env-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(147, 197, 253, 0.1);
    transition: all var(--transition-normal);
}

.env-card:hover {
    border-color: var(--blue-400);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.env-img-placeholder {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(96, 165, 250, 0.05));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--blue-300);
}

.env-img-placeholder i {
    font-size: 40px;
    opacity: 0.4;
}

.env-img-placeholder span {
    font-size: 13px;
    opacity: 0.5;
    letter-spacing: 2px;
}

.env-large .env-img-placeholder {
    aspect-ratio: 16/12;
}

.env-caption {
    padding: 24px;
}

.env-caption h4 {
    font-family: var(--font-serif);
    font-size: 17px;
    color: var(--white);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.env-caption p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.5px;
}

.env-side {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.env-side .env-img-placeholder {
    aspect-ratio: 16/8;
}

/* ---------- Advantages Section ---------- */
.advantages {
    background: var(--bg-section);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 48px 24px;
    background: var(--white);
    border-radius: 16px;
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.advantage-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.06);
    border-color: var(--blue-200);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--blue-500);
    transition: all var(--transition-fast);
}

.advantage-item:hover .advantage-icon {
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: var(--white);
    transform: scale(1.1);
}

.advantage-item h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

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

/* ---------- Testimonials Section ---------- */
.testimonials {
    background: var(--white);
    position: relative;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-200), transparent);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-light);
    border-radius: 16px;
    padding: 40px 32px;
    position: relative;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(15, 23, 42, 0.06);
    border-color: var(--blue-100);
}

.testimonial-quote {
    margin-bottom: 16px;
}

.testimonial-quote i {
    font-size: 24px;
    color: var(--blue-300);
    opacity: 0.6;
}

.testimonial-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 28px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.author-avatar {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--white);
    font-family: var(--font-serif);
}

.testimonial-author h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
}

.testimonial-author span {
    font-size: 12px;
    color: var(--text-light);
}

/* ---------- Contact Section ---------- */
.contact {
    background: var(--bg-section);
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.contact-card-item {
    background: var(--white);
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: all var(--transition-normal);
}

.contact-card-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(15, 23, 42, 0.06);
    border-color: var(--blue-200);
}

.contact-card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--blue-500);
    transition: all var(--transition-fast);
}

.contact-card-item:hover .contact-card-icon {
    background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
    color: var(--white);
}

.contact-card-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.contact-card-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-card-note {
    display: inline-block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--blue-500);
}

.contact-bottom {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 30px;
    align-items: stretch;
}

.contact-map-placeholder {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--blue-300);
}

.contact-map-placeholder i {
    font-size: 48px;
    opacity: 0.5;
}

.contact-map-placeholder span {
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: 1px;
}

.contact-extra {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-social-block {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    padding: 32px;
    flex: 1;
}

.contact-social-block h4 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.contact-social-block p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--bg-light);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--blue-500);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--blue-500);
    color: var(--white);
    border-color: var(--blue-500);
    transform: translateY(-2px);
}

.contact-cta {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    border-radius: 16px;
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
    color: var(--white);
}

.contact-cta > i {
    font-size: 36px;
    opacity: 0.8;
}

.contact-cta h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-cta p {
    font-size: 13px;
    line-height: 1.7;
    opacity: 0.85;
}

.contact-cta strong {
    color: var(--blue-200);
}

/* ---------- Footer ---------- */
.footer {
    background: var(--blue-950);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 18px;
}

.footer-logo .logo-cn {
    font-size: 16px;
}

.footer-slogan {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 2px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

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

.footer-col ul li a,
.footer-col ul li {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
    color: var(--blue-300);
}

.footer-col ul li i {
    width: 20px;
    margin-right: 8px;
    color: var(--blue-400);
    font-size: 12px;
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
}

.footer-bottom p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--blue-500);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-fast);
    z-index: 100;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

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

.back-to-top:hover {
    background: var(--blue-600);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

/* ---------- Scroll Animations ---------- */
[data-animate] {
    opacity: 0;
    transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

[data-animate="fade-up"] {
    transform: translateY(40px);
}

[data-animate="fade-down"] {
    transform: translateY(-40px);
}

[data-animate="fade-right"] {
    transform: translateX(-40px);
}

[data-animate="fade-left"] {
    transform: translateX(40px);
}

[data-animate].animated {
    opacity: 1;
    transform: translate(0, 0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    :root { --section-padding: 80px; }

    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .env-showcase { grid-template-columns: 1fr; }
    .env-side { flex-direction: row; }
    .env-side .env-card { flex: 1; }
}

@media (max-width: 768px) {
    :root { --section-padding: 60px; }

    .nav-links, .nav-phone { display: none; }
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 0;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    }
    .nav-links.active li {
        border-bottom: 1px solid var(--gray-100);
    }
    .nav-links.active a {
        display: block;
        padding: 16px 0;
        color: var(--gray-700) !important;
    }
    .nav-toggle { display: flex; }

    .hero-stats { flex-wrap: wrap; }
    .stat-item { flex: 1 1 50%; }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-exp-badge { right: 20px; bottom: -20px; width: 100px; height: 100px; }
    .exp-number { font-size: 30px; }

    .services-grid { grid-template-columns: 1fr; }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .advantages-grid { grid-template-columns: 1fr 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .contact-cards { grid-template-columns: repeat(2, 1fr); }
    .contact-bottom { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr; }

    .env-side { flex-direction: column; }

    .hero-actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 280px; justify-content: center; }
}

@media (max-width: 480px) {
    .team-grid { grid-template-columns: 1fr; max-width: 320px; margin: 0 auto; }
    .advantages-grid { grid-template-columns: 1fr; }
    .contact-cards { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
    .stat-item { padding: 20px 10px; }
    .stat-number { font-size: 28px; }
}